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WO2024213770A1 - Dispositif et procédé de fabrication d'un film pour accumulateur d'énergie électrique - Google Patents

Dispositif et procédé de fabrication d'un film pour accumulateur d'énergie électrique Download PDF

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Publication number
WO2024213770A1
WO2024213770A1 PCT/EP2024/060089 EP2024060089W WO2024213770A1 WO 2024213770 A1 WO2024213770 A1 WO 2024213770A1 EP 2024060089 W EP2024060089 W EP 2024060089W WO 2024213770 A1 WO2024213770 A1 WO 2024213770A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
polyethylene
screw machine
housing
shaft screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/060089
Other languages
German (de)
English (en)
Inventor
Tim EBINGER
Cornelia Koch
Frank Lechner
Bernhard Stark
Michael Dürr
Thorsten Stirner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coperion GmbH
Original Assignee
Coperion GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coperion GmbH filed Critical Coperion GmbH
Priority to CN202480025428.3A priority Critical patent/CN121079189A/zh
Publication of WO2024213770A1 publication Critical patent/WO2024213770A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/94—Liquid charges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/29—Feeding the extrusion material to the extruder in liquid form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/297—Feeding the extrusion material to the extruder at several locations, e.g. using several hoppers or using a separate additive feeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/94—Lubricating
    • B29C48/95—Lubricating by adding lubricant to the moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/82—Heating or cooling
    • B29B7/823—Temperature control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/286—Raw material dosing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene

Definitions

  • the invention relates to a device and a method for producing a film for electrical energy storage devices, in particular for batteries and/or accumulators.
  • Films are used in electrical energy storage devices, such as batteries and/or accumulators, to electrically insulate the electrodes. This is why such films are also called separator films. In order to enable the necessary exchange of electrons or ions, the films must have a porous structure.
  • EP 3 281 767 A1 discloses a device and a method for producing a film for electrical energy storage.
  • the device comprises a multi-shaft screw machine which is used to produce a melt from a polyethylene and a heated oil.
  • the multi-shaft screw machine comprises a housing in which at least two mutually penetrating housing bores are formed.
  • a treatment element shaft which has at least three-start treatment elements is rotatably arranged in the respective housing bore.
  • the respective treatment element shaft has an outer diameter D a and a core diameter Di, where: 1.1 ⁇ Da/Di ⁇ 1.3.
  • the design of the treatment element shafts enables intensive mixing of the melted polyethylene and the oil at a low speed of the at least two treatment element shafts, so that the polyethylene and the oil are not thermally damaged.
  • the invention is based on the object of creating a device which enables a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • a device having the features of claim 1. Due to the fact that Da/Di > 1.4 applies to at least one treatment element per treatment element shaft, the free cross-sectional area and thus the free volume is increased in at least some sections in the at least two housing bores of the multi-shaft screw machine. Due to the higher free volume, a small amount of pressure acts on the at least one polyethylene and/or the oil. lower shear, in particular a lower shear force and/or a lower shear rate, so that the at least one polyethylene and the oil are gently processed into a melt.
  • the mechanical energy supplied to the at least one polyethylene and/or the oil by the shear is low, so that the at least one polyethylene and/or the oil is/are not thermally impaired or damaged, or at least not to a relevant extent.
  • the device according to the invention thus enables a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the at least one treatment element is designed in particular as a conveying element and/or as a kneading element and/or as a mixing element.
  • the at least one treatment element is designed as a kneading disk.
  • Several kneading disks arranged one after the other in a conveying direction of the multi-shaft screw machine can be designed individually and/or in one piece as a kneading block.
  • the multi-shaft screw machine has several treatment elements per treatment element shaft, the ratio D a /Di of which lies in the claimed range.
  • the treatment elements can have an identical ratio D a /Di and/or different ratios Da/Di in the claimed range.
  • each treatment element shaft comprises several conveying elements and/or several kneading elements and/or several mixing elements, the ratio Da/Di of which lies in the claimed range.
  • the conveying elements and/or kneading elements and/or mixing elements can have an identical ratio Da/Di and/or different ratios Da/Di in the claimed range.
  • the multi-shaft screw machine is designed to rotate in the same direction.
  • the at least two treatment element shafts are rotatable or can be driven in rotation in the same direction of rotation about a respective axis of rotation.
  • the at least two treatment element shafts are preferably designed to mesh with one another, in particular to mesh closely.
  • the multi-shaft screw machine is preferably designed as a two-shaft screw machine, in particular as a two-shaft screw machine rotating in the same direction.
  • the two-shaft screw machine comprises two housing bores formed in the housing and penetrating one another, which in particular have the shape of a horizontal figure eight in cross-section.
  • a treatment element shaft is arranged rotatably in each of the two housing bores.
  • the respective The treatment element shaft preferably comprises a profiled shaft on which several treatment elements, in particular conveying elements and/or kneading elements and/or mixing elements, are fastened.
  • the at least two treatment element shafts are designed in particular to mesh closely with one another, so that adjacent treatment elements strip one another in a closely meshing manner.
  • the at least two treatment element shafts are designed in particular in such a way that an inner wall of the housing delimiting the at least two housing bores is stripped. This achieves sufficient mixing of the at least one polyethylene and the oil as well as a cleaning effect. The cleaning effect ensures that the at least one polyethylene and/or the oil do not remain in the multi-shaft screw machine for an inadmissibly long time and thermally degrade.
  • the multi-shaft screw machine preferably comprises a heating device for heating the at least one polyethylene and/or the oil in the at least two housing bores and/or a cooling device for cooling the melted at least one polyethylene and/or the oil in the at least two housing bores.
  • the heating device is arranged in particular on the housing and/or in the housing.
  • the heating device preferably comprises heating plates which rest against the housing and/or heating cartridges which are arranged in associated bores in the housing.
  • the heating device can preferably be operated electrically and/or by means of a heat transfer fluid. For example, at least one heating channel for the heat transfer fluid is formed in the housing.
  • the cooling device serves in particular to cool the melt.
  • the cooling device is operated in particular by means of a cooling fluid.
  • at least one cooling channel for the cooling fluid is formed in the housing.
  • the housing of the multi-shaft screw machine forms a heating area and/or a cooling area.
  • the cooling area is arranged after the heating area in a conveying direction of the multi-shaft screw machine.
  • the heating area has a length LH in the conveying direction, whereas the cooling area has a length LK in the conveying direction.
  • LH/LK ratio applies: 0.5 ⁇ LH/LK ⁇ 3, in particular 0.75 ⁇ LH/LK ⁇ 2.5, and in particular 1 ⁇ LH/LK ⁇ 2.
  • the device preferably comprises a first feed device for feeding the at least one polyethylene into the multi-shaft screw machine and/or into a comminution device or mixing device.
  • the first feed device is arranged upstream of the comminution device or mixing device, so that the at least one polyethylene is fed from the first feed device via the comminution device or mixing device into the multi-shaft screw machine.
  • the first feed device in particular comprises at least one gravimetric dosing device.
  • the first feed device can in particular be thermally insulated and/or heated.
  • a first preheating device for heating the at least one polyethylene is preferably arranged upstream of the first feed device.
  • the device preferably comprises a comminution device for comminution of the at least one polyethylene.
  • the at least one polyethylene is in particular designed as a bulk material, for example as granules and/or powder.
  • the comminution device is used in particular for comminution of granules and/or powder and/or agglomerates.
  • the comminution device is arranged in front of the first feed device, in particular in front of the first preheating device.
  • the at least one polyethylene is fed to the multi-shaft screw machine in a comminuted form.
  • the at least one polyethylene is preferably heated after comminution by means of the first preheating device.
  • the at least one polyethylene can be melted or plasticized more easily and/or more quickly in the multi-shaft screw machine.
  • the comminution device comprises, for example, a mill and/or a turbo mixer and/or an intensive mixer.
  • the device preferably comprises a second feed device for feeding the oil into the multi-shaft screw machine.
  • the second feed device comprises in particular at least one metering pump and/or at least one nozzle.
  • the second feed device is in particular thermally insulated and/or heated and/or cooled.
  • a second preheating device for heating the oil and/or a cooling device for cooling the oil is preferably arranged upstream of the second feed device.
  • a first part of the oil is heated by means of the second preheating device, whereas a second part of the oil is not heated and/or is cooled by means of the cooling device.
  • the first part of the oil is fed in a conveying direction of the multi-shaft screw machine upstream of the second part of the oil.
  • the second preheating device is thus connected in particular to at least one first oil supply opening of the multi-shaft screw machine, whereas the cooling device is connected to at least one second oil supply opening of the multi-shaft screw machine, which is arranged downstream of the at least one first oil supply opening in the conveying direction.
  • the device preferably comprises at least one screening device for cleaning the melt.
  • the at least one screening device is arranged in a conveying direction after the multi-shaft screw machine.
  • the at least one screening device improves the quality of the melt in a simple and energy-efficient manner.
  • several screening devices are provided which have a staggered screening fineness in the conveying direction of the melt.
  • the at least one screening device is designed in particular as a screen changing device, crusher plate, disk filter and/or candle filter.
  • the device preferably comprises at least one melt pump, which is arranged downstream of the multi-shaft screw machine in a conveying direction.
  • the at least one melt pump is preferably arranged upstream of a discharge nozzle in the conveying direction.
  • the at least one melt pump increases the pressure of the melt for discharge through the discharge nozzle in a simple and energy-efficient manner.
  • at least one screening device is arranged between the at least one melt pump and the discharge nozzle.
  • the melt pump is designed as a gear pump, for example.
  • the device preferably comprises at least one discharge nozzle.
  • the at least one discharge nozzle is arranged in a conveying direction after the at least one screening device and/or after the at least one melt pump.
  • the at least one discharge nozzle serves to produce a film from the melt.
  • the discharge nozzle is preferably designed as a slot nozzle, in particular as a wide slot nozzle.
  • the device preferably comprises a control device.
  • the control device serves in particular to control a first preheating device for heating the at least one polyethylene and/or a second preheating device for heating the oil and/or a cooling device for cooling the oil and/or the multi-shaft screw machine and/or a first feed device for feeding the at least one polyethylene and/or a second feed device for feeding the oil and/or at least one screening device and/or at least one melt pump.
  • the control device controls in particular the first preheating device such that the heated at least one polyethylene has a temperature Tp and/or controls in particular the second preheating device such that the heated oil has a temperature To.
  • control device controls the multi-shaft screw machine in particular such that the at least two treatment element shafts are driven in rotation at the speed N and/or a torque Md and/or the at least one polyethylene in the multi-shaft screw machine has an average residence time tv.
  • control device controls the first feed device and the second feed device such that the melt comprises 15 vol.% to 50 vol.% polyethylene and 50 vol.% to 85 vol.% oil, in particular 20 vol.% to 35 vol.% polyethylene and 65 vol.% to 80 vol.% oil.
  • a device ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the higher the ratio Da/Di the higher the free cross-sectional area and thus the free volume in the at least two housing bores and the lower the shear acting on the at least one polyethylene and/or the oil.
  • the upper limit for the ratio Da/Di ensures sufficient mechanical energy input for melting the at least one polyethylene and/or for mixing the melted at least one polyethylene and the oil.
  • the lower the upper limit the higher the minimum input of mechanical energy into the at least one polyethylene and/or the oil.
  • each treatment element shaft has a plurality of treatment elements which are arranged one after the other in a conveying direction and whose ratio Da /Di lies in the claimed range.
  • the treatment elements can have an identical ratio Da/Di and/or different ratios Da/Di in the claimed range.
  • a device ensures simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the L/D ratio ensures, on the one hand, a sufficiently long residence time of the at least one polyethylene and/or the oil in the multi-shaft screw machine in order to ensure sufficient mixing and a homogeneous melt, and, on the other hand, uneconomical production and/or excessive mechanical energy input are avoided.
  • the higher the L/D ratio the longer the residence time of the at least one polyethylene and/or the oil in the multi-shaft screw machine and the better their mixing and homogenization.
  • the lower the L/D ratio the more economical and/or gentle the production of the melt.
  • a device ensures simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the treatment elements of the respective treatment element shaft which have a ratio Da/Di in the claimed range, define the total length LM.
  • the treatment elements can be arranged directly one after the other in the conveying direction and/or distributed in the conveying direction.
  • the total length LM is the sum of the widths of all treatment elements of the respective treatment element shaft whose ratio Da/Di is in the claimed range.
  • the ratio LM/L ensures that the shear acting on the at least one polyethylene and/or the oil is reduced over the length LM, since there is a higher free cross-sectional area and thus a higher free volume in the at least two housing bores over the length LM.
  • a device ensures simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the at least one treatment element has at least one comb.
  • the number of combs is denoted below as k.
  • the following preferably applies to the number of combs k: k 2.
  • the number of combs k ensures, on the one hand, a sufficient free cross-sectional area or a sufficient free volume and, on the other hand, sufficient mixing of the at least one polyethylene and the oil.
  • the number of combs k corresponds to the number of gears.
  • a device ensures simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the at least one polyethylene is heated to a temperature Tp by means of the first preheating device.
  • the at least one polyethylene to be heated or heated is in particular designed as a bulk material, for example as a powder and/or granulate.
  • the first preheating device is arranged in front of the multi-shaft screw machine for feeding the heated at least one polyethylene.
  • the first preheating device is arranged in particular in front of a first feed device for feeding the at least one polyethylene into the multi-shaft screw machine.
  • the at least one polyethylene is heated to the temperature Tp when fed into the multi-shaft screw machine, less mechanical energy has to be introduced into the at least one polyethylene in order to melt the at least one polyethylene in the multi-shaft screw machine. This makes the melting or processing of the at least one polyethylene gentler and more energy-efficient.
  • the first preheating device is used in particular for the direct and/or indirect transfer of heat to the at least one polyethylene.
  • Direct heat transfer is understood in particular to mean that a heat transfer fluid, for example a warm gas, is in direct contact with the at least one polyethylene.
  • indirect heat transfer is understood in particular to mean that a heat transfer fluid is not in direct contact with the at least one polyethylene, i.e. is separated from the at least one polyethylene by a heat transfer element, such as a metal plate and/or a metal pipe.
  • the first preheating device preferably comprises a bulk material heat exchanger.
  • the bulk material heat exchanger serves in particular for the indirect transfer of heat to the at least one polyethylene.
  • the at least one polyethylene is conveyed, for example, gravimetrically and/or pneumatically through the bulk material heat exchanger.
  • a heated gas, steam and/or in particular a heated liquid serves as the heat transfer fluid, for example.
  • the first preheating device preferably comprises a heating screw machine.
  • the heating screw machine comprises in particular a housing, at least one housing bore formed therein and at least one conveyor shaft.
  • the at least one conveyor shaft is arranged rotatably in the respective associated housing bore.
  • the respective conveyor shaft preferably comprises a shaft and conveyor elements which are fastened to the shaft one after the other in a conveying direction.
  • the at least one conveyor element is in particular a full-blade screw which is welded onto the shaft.
  • the housing and/or the at least one conveyor shaft can be heated.
  • the shaft and/or at least one conveyor element can be heated.
  • a respective channel for a heat transfer fluid is formed in the housing and/or in the shaft and/or in the at least one conveyor element.
  • a heat transfer fluid flows through the screw flanks.
  • the heating screw machine enables a low installation height and can in particular be operated flexibly with different throughputs.
  • the heating screw machine is used in particular for the indirect transfer of heat to the at least one polyethylene.
  • Additives can optionally also be added or dosed into the heating screw machine. The additives are then mixed into the at least one polyethylene and also preheated.
  • the first preheating device for the at least one polyethylene comprises a fluidized bed heater and/or a silo container.
  • a gas flows through fluidized bed heaters and/or silo containers, which is supplied, for example, via a blower.
  • the first preheating device comprises a heating chamber and/or a heating cabinet for directly and/or indirectly transferring heat to the at least one polyethylene.
  • the first preheating device in particular a direct transfer and an indirect transfer of heat can be combined.
  • a device ensures simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the second preheating device serves to heat at least part of the oil to be fed to a temperature To. Because the oil is heated to the temperature To when fed into the multi-shaft screw machine, the at least one polyethylene in the multi-shaft screw machine is further heated by the heated oil. As a result, less energy has to be introduced into the at least one polyethylene and/or the oil by means of the multi-shaft screw machine.
  • the second preheating device comprises in particular a heat exchanger and/or electrical resistance heating elements.
  • the second preheating device is connected to the multi-shaft screw machine for supplying heated oil via the second supply device.
  • the multi-shaft screw machine preferably comprises at least two oil supply openings which are arranged one after the other in a conveying direction. At least one second oil supply opening is thus arranged downstream of at least one first oil supply opening in the conveying direction.
  • the second preheating device is connected to the multi-shaft screw machine via the second feed device in such a way that heated oil is fed through the at least one first oil feed opening and through the at least one second oil feed opening.
  • heated oil is fed through all oil feed openings.
  • the second preheating device is connected to the multi-shaft screw machine via the second feed device in such a way that heated oil is fed into the multi-shaft screw machine through the at least one first oil feed opening, but not through the at least one second oil feed opening.
  • the second preheating device is thus not connected to the at least one second oil feed opening via the second feed device.
  • Unheated oil and/or cooled oil is fed into the multi-shaft screw machine through the at least one second oil feed opening by means of the second feed device.
  • the device according to the invention comprises in particular a cooling device.
  • the cooling device is connected to the at least one second oil feed opening by means of the second feed device for feeding the cooled oil.
  • Unheated oil and/or cooled oil can be fed in a corresponding manner through any oil feed openings that are arranged after the at least one second oil feed opening in the conveying direction.
  • Either heated oil or unheated and uncooled oil or cooled oil can be fed through each oil feed opening in the manner described above.
  • heated oil is fed through at least one first oil feed opening as seen in the conveying direction
  • unheated or cooled oil is fed through at least one last oil feed opening as seen in the conveying direction.
  • the melt is cooled by the unheated oil or the cooled oil, whereby the temperature of the melt at a discharge opening of the multi-shaft screw machine is reduced. This can in particular increase the throughput.
  • the oil has a temperature of at least 60 °C when fed through the at least one first oil feed opening and the oil has a temperature of less than 60 °C, in particular of at most 40 °C, when fed through the at least one last oil feed opening.
  • a device ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the at least one feed opening for feeding the at least one polyethylene is referred to below as at least one polyethylene feed opening, whereas the at least one feed opening for feeding the oil is referred to below as oil feed opening.
  • the at least one oil feed opening is arranged in a conveying direction of the multi-shaft screw machine, in particular after the at least one polyethylene feed opening. As a result, the oil is fed into the at least one polyethylene already in the multi-shaft screw machine.
  • the at least one polyethylene feed opening and/or the at least one oil feed opening are in particular in the housing and open into the at least two housing bores.
  • the respective oil feed opening is arranged after at least one polyethylene feed opening in the conveying direction.
  • the multi-shaft screw machine comprises at least two oil feed openings, in particular at least three oil feed openings, which are arranged one after the other in the conveying direction and after at least one polyethylene feed opening.
  • the multi-shaft screw machine comprises at most 20, in particular at most 16, and in particular at most 12 oil feed openings. The oil feed openings enable the oil to be fed in successively and the oil to be mixed better with the at least one polyethylene, in particular with the melted at least one polyethylene.
  • a device ensures simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the feed openings for feeding the oil are referred to below as oil feed openings.
  • the distance LA or the ratio LA/D ensures that the oil is fed successively into the multi-shaft screw machine and mixed with the at least one polyethylene or the melted at least one polyethylene.
  • the distance LA or the ratio LA/D ensures in particular that oil already fed in is sufficiently mixed with the at least one polyethylene before further oil is fed into the multi-shaft screw machine.
  • the distances LA between two adjacent feed openings or the ratios LA/D can be the same and/or different.
  • a device ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the feed openings for feeding the oil are referred to below as oil feed openings. Because several oil feed openings open into the at least two housing bores at different positions along the circumferential contour of the at least two housing bores, the at least one polyethylene or melted at least one polyethylene located in the at least two housing bores is wetted from different sides with the supplied oil. This improves the mixing of the oil with the at least one polyethylene or the melted at least one polyethylene.
  • At least one oil feed opening opens into a gusset area, preferably in each gusset area, and/or at least one oil supply opening in a side region, preferably in each side region, in the at least two housing bores.
  • the oil supply openings can be arranged in the conveying direction at the same position of the housing and/or at different positions of the housing.
  • the multi-shaft screw machine preferably comprises a number m of different positions along the circumferential contour at which oil supply openings are arranged, where: 2 ⁇ m ⁇ 8, in particular 3 ⁇ m ⁇ 7, and in particular 4 ⁇ m ⁇ 6.
  • the oil is preferably supplied into the at least two housing bores by means of a respective nozzle.
  • the respective nozzle is arranged in an associated oil supply opening and/or connected to an associated oil supply opening.
  • a device ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the treatment elements of the at least two treatment element shafts whose ratio D a /Di lies in the claimed range, limit the free cross-sectional area AF with the housing.
  • the cross-sectional area of the at least two housing bores is designated as cross-sectional area A.
  • the ratio AF/A ensures a comparatively high free cross-sectional area AF and thus a high free volume in the at least two housing bores. Accordingly, the ratio AF/A ensures that a low shear acts on the at least one polyethylene and/or the oil and that the processing is gentle.
  • a device ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the shredding device is arranged in particular in front of the first feed device.
  • the at least one polyethylene is designed as a bulk material, for example as granules and/or powder.
  • the shredding device serves to shred granules and/or powder and/or agglomerates.
  • the at least one polyethylene is fed to the multi-shaft screw machine in shredded form.
  • the smaller the particle size of the at least one polyethylene the easier it is to mix the at least one polyethylene and the oil together to form a homogeneous melt.
  • the at least one polyethylene can be melted or plasticized more easily and/or more quickly in the multi-shaft screw machine.
  • the comminution device comprises, for example, a housing in which at least one comminution element is arranged.
  • the comminution device comprises, for example, a mill and/or a turbo mixer.
  • the comminution device is preferably arranged upstream of the first preheating device.
  • a device ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the shredding device By feeding part of the oil to the shredding device, at least part of the at least one polyethylene and part of the oil can be mixed with one another before being fed into the at least two housing bores of the multi-shaft screw machine.
  • the at least one polyethylene is pre-wetted using the oil.
  • the at least one polyethylene in the multi-shaft screw machine can be more easily mixed with the oil that is fed into the at least two housing bores due to the surface provided with the oil.
  • the wetting of the surface of the at least one polyethylene can improve the feed into the at least two housing bores of the multi-shaft screw machine.
  • the comminution device preferably comprises at least one comminution element which is arranged in a housing.
  • the at least one comminution element is used in particular for mixing the at least one polyethylene with the oil.
  • the at least one comminution element can preferably be rotated about a rotation axis by means of a drive. As a result, agglomerates are comminuted by means of the at least one comminution element on the one hand and the at least one polyethylene is mixed and/or pre-wetted with the oil on the other.
  • the comminution device is arranged after the first feed device.
  • the comminution device is arranged in particular between the first feed device and the multi-shaft screw machine.
  • a first preheating device for heating the at least one polyethylene in front of the comminution device and/or in front of the first feed device.
  • the comminution device is in particular directly connected to the multi-shaft screw machine.
  • a device ensures simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the oil cooling device is used to feed unheated or cooled oil into the multi-shaft screw machine.
  • the oil cooling device is connected to at least one oil feed opening of the multi-shaft screw machine for feeding the cooled oil by means of the second feed device.
  • the second preheating device is connected to at least one first oil feed opening and the oil cooling device is connected to at least one second oil feed opening, which is arranged downstream of the at least one first oil feed opening in the conveying direction.
  • the melt in the multi-shaft screw machine is cooled by the cooled oil, whereby the temperature of the melt at a discharge opening of the multi-shaft screw machine is reduced. This can in particular increase the throughput.
  • a device ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the housing of the multi-shaft screw machine comprises several housing sections which are arranged one after the other in a conveying direction and connected to one another.
  • the housing sections comprise, for example, flanges which are screwed together.
  • At least one of the housing sections comprises a housing shell and a sleeve.
  • the sleeve is arranged in the housing shell and forms the at least two housing bores which penetrate one another in sections.
  • At least one spiral-shaped fluid channel is formed between the housing shell and the sleeve.
  • At least one spiral-shaped fluid channel is formed on an outer wall of the sleeve and/or on an inner wall of the housing shell.
  • the at least one fluid channel runs spirally around the at least two treatment element shafts.
  • at least two spiral-shaped fluid channels are formed between the housing shell and the sleeve.
  • the at least two fluid channels are arranged one after the other in a conveying direction at least in sections.
  • At least one supply opening and at least one discharge opening are formed in the housing shell, which open into the at least one fluid channel.
  • the at least one housing section can be used for heating and/or cooling.
  • the at least one fluid channel is connected to a heating device for heating and/or to a cooling device for cooling.
  • a fluid flowing through the at least one fluid channel is heated by means of the heating device.
  • the heated fluid can release heat energy to the at least one polyethylene located in the at least two housing bores and/or to the oil.
  • a fluid flowing through the at least one fluid channel is cooled by means of the cooling device.
  • the melt located in the at least two housing bores can release heat energy to the fluid, which transports the heat energy away from the at least one housing section.
  • the housing preferably comprises a plurality of housing sections, each of which comprises a housing casing and a sleeve, which together form at least one fluid channel.
  • at least one of these housing sections preferably a plurality of these housing sections, is used for heating and/or at least one of these housing sections, preferably a plurality of these housing sections, is used for cooling.
  • housing sections can be connected to the heating device together and/or independently or individually, so that the housing sections can be heated in the same way by means of a heated fluid and/or can be heated independently or individually by means of a respective heated fluid.
  • housing sections can be connected to the cooling device together and/or independently or individually, so that the housing sections can be cooled in the same way by means of a cooled fluid and/or can be cooled independently or individually by means of a respective cooled fluid.
  • the at least one housing section enables improved heat transfer.
  • the sleeve is made in particular from a material with high thermal conductivity.
  • the sleeve has a higher thermal conductivity than the housing shell.
  • the thermal conductivity X of the sleeve is in particular 20 W/(m • K) ⁇ k ⁇ 60 W/(m • K), in particular 28 W/(m • K) ⁇ k ⁇ 52 W/(m • K), and in particular 30 W/(m • K) ⁇ k ⁇ 45 W/(m • K).
  • the at least one polyethylene and/or oil can be heated more quickly and efficiently, thereby improving the production of a homogeneous melt. Furthermore, the melt produced can be cooled more quickly and efficiently, whereby overheating and deterioration of the melt can be easily avoided.
  • the at least one fluid channel forms in particular a number W of turns around the at least two treatment element shafts.
  • the at least one fluid channel has a maximum channel width or a diameter DF. Adjacent turns of the at least one fluid channel are spaced Aw apart from one another in the conveying direction. The following applies in particular to the maximum channel width or the diameter DF: 5 mm ⁇ DF ⁇ 40 mm, in particular 7 mm ⁇ DF ⁇ 30 mm, and in particular 9 mm ⁇ DF ⁇ 20 mm.
  • the preferred ratio AW/DF is: 0.5 ⁇ AW/DF ⁇ 3.5, in particular 1 ⁇ AW/DF ⁇ 3, and in particular 1.5 ⁇ AW/DF ⁇ 2.5.
  • a device ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the throttle device serves to adjust a filling level of the multi-shaft screw machine and/or a residence time of the at least one polyethylene and the oil in the multi-shaft screw machine. This can improve the mixing and homogenization of the at least one polyethylene with the oil.
  • the throughput through the multi-shaft screw machine can be increased and/or a length L of the at least two treatment element shafts or a length of the multi-shaft screw machine can be reduced.
  • the throttle device preferably comprises a housing in which a passage channel is formed. In the passage channel there is at least one throttle body for adjusting a free cross-sectional area of the passage channel.
  • the at least one throttle body is adjustable in particular by means of a drive, in particular rotatable about a rotation axis.
  • the invention is based on the object of creating a method which enables a simple, gentle and energy-efficient production of a film for electrical energy storage devices.
  • the at least one polyethylene and the oil are first fed through the at least one feed opening into the at least two housing bores of the multi-shaft screw machine.
  • the at least one polyethylene is selected from at least one of the polyethylene types HMW-PE, UHMW-PE, HD-PE, LD-PE and/or LLD-PE.
  • the at least one polyethylene can be selected from at least one of the polyethylene types.
  • the at least one polyethylene can comprise or combine the same polyethylene types and/or different polyethylene types with the same molecular weights and/or different molecular weights.
  • the oil is selected, for example, from white oil and/or paraffin oil.
  • the at least one polyethylene is, for example, in the form of bulk material, in particular as powder and/or granulate.
  • powdered polyethylene is fed into the multi-shaft screw machine.
  • the at least one polyethylene and the oil can be fed into the at least two housing bores via a common feed opening and/or via separate feed openings.
  • the at least one polyethylene and the oil can, for example, be fed separately into the multi-shaft screw machine via a common feed opening and/or fed as a premix into the multi-shaft screw machine via the common feed opening.
  • To produce a premix at least a portion of the at least one polyethylene and at least a portion of the oil, in particular of the heated oil, mixed together before feeding into the multi-shaft screw machine.
  • the at least one polyethylene supplied is melted to form a polyethylene melt and mixed with the oil supplied to form a homogeneous melt.
  • the ratio Da/Di of the at least one treatment element of the respective treatment element shaft results in a higher free cross-sectional area and thus a higher free volume, which reduces the shear acting on the at least one polyethylene or the polyethylene melt and the oil and the associated thermal load.
  • the melt comprises in particular 15 vol.% to 50 vol.% polyethylene and 50 vol.% to 85 vol.% oil, in particular 20 vol.% to 35 vol.% polyethylene and 65 vol.% to 80 vol.% oil.
  • 40% to 80%, in particular 55% to 75%, of the oil is fed through a first oil feed opening and 20% to 60%, in particular 25% to 45%, of the oil is fed through at least one further oil feed opening which is arranged downstream of the first oil feed opening in a conveying direction.
  • mixing with the at least one polyethylene is simplified if the oil is fed through several oil feed openings arranged one after the other in the conveying direction and is successively mixed with the at least one polyethylene in several associated mixing zones. Downstream of the respective oil supply opening, in particular an associated mixing zone is formed, in which the at least two treatment element shafts each have at least one treatment element with the ratio Da/Di.
  • additives and/or fillers can be mixed into the melt, such as stabilizers, lubricants, titanium dioxide or calcium carbonate.
  • the additives and/or fillers can be mixed with the at least one polyethylene to form a premix and the premix fed into the multi-shaft screw machine and/or fed separately to the at least one polyethylene into the multi-shaft screw machine.
  • the additives and/or fillers can be mixed as a premix and/or separately through at least one Polyethylene feed opening into the multi-shaft screw machine.
  • the additives and/or fillers can be fed in particular to the first preheating device, preferably a heating screw machine, so that the additives and/or fillers are mixed and heated with the at least one polyethylene to form a premix.
  • the melt produced is discharged through a discharge nozzle.
  • the discharge nozzle is preferably designed as a slot nozzle, in particular as a wide slot nozzle.
  • the film produced is then smoothed, stretched and/or cooled in the usual way.
  • the oil in the film is then washed out of the film in a solvent bath in order to form the desired pore structure in the film.
  • the film is used, for example, for the production of lithium-ion batteries and/or lithium-ion accumulators.
  • a method according to claim 18 ensures a simple, gentle and energy-efficient production of a film for electrical energy storage. Because the at least one polyethylene is heated and has the temperature Tp when fed in and/or at least part of the oil is heated and has the temperature To when fed in, less mechanical energy has to be introduced into the at least one polyethylene or the melted at least one polyethylene and/or the oil by means of the multi-shaft screw machine in order to produce the homogeneous melt. This makes the production of the film gentle and energy-efficient. Due to the low mechanical energy input, the at least one polyethylene and/or the oil is not impaired or thermally damaged.
  • the at least one polyethylene is heated by means of a first preheating device and fed into the multi-shaft screw machine by means of a first feed device.
  • the first preheating device comprises, for example, a bulk material heat exchanger, a heating screw machine, a fluidized bed heater, a blower, a heating chamber and/or a heating cabinet.
  • the first feed device can in particular be thermally insulated and/or heated, so that the temperature of the at least one polyethylene essentially does not decrease from the first preheating device to the feed into the multi-shaft screw machine.
  • the oil is heated by means of a second preheating device and fed into the multi-shaft screw machine by means of a second feed device.
  • the second preheating device comprises in particular a heat exchanger and/or electrical resistance heating elements.
  • the second feed device is in particular thermally insulated and/or heated and/or cooled, so that the oil has a desired temperature when fed into the multi-shaft screw machine.
  • a method according to claim 19 ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the at least two treatment element shafts are driven in rotation at a low speed N.
  • This achieves a low mechanical energy input into the at least one polyethylene and/or the oil.
  • the low speed N achieves a low average shear rate y.
  • the shear rate y depends on the ratio Da/Di and the speed N.
  • the average shear rate y can be calculated in the usual way. The following preferably applies to the shear rate y: 3-1/s ⁇ y ⁇ 33-1/s, in particular 8-1/s ⁇ y ⁇ 28-1/s, and in particular 13-1/s ⁇ y ⁇ 23-1/s.
  • the low speed N increases the average residence time tv of the at least one polyethylene in the multi-shaft screw machine. This ensures sufficient mixing of the melted at least one polyethylene and the oil to form a homogeneous melt.
  • a method according to claim 20 ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the residence time tv ensures that the at least one polyethylene is melted and sufficiently mixed with the oil to form a homogeneous melt.
  • the average residence time tv can be determined, for example, by adding dye and an associated time measurement until the dye is discharged.
  • the residence time tv is determined by the length L of the at least two Treatment element shafts can be adjusted by the configuration of the at least two treatment element shafts, by the throughput and/or by the rotational speed N of the at least two treatment element shafts.
  • a throttle device is arranged downstream of the multi-shaft screw machine in a conveying direction.
  • the throttle device serves to adjust a filling level of the multi-shaft screw machine and/or the residence time tv of the at least one polyethylene and the oil in the multi-shaft screw machine.
  • a method according to claim 21 ensures simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the method according to the invention allows the multi-shaft screw machine to be operated at a low speed N. This introduces low shear and ensures gentle processing, whereby the installed power can be used as optimally as possible.
  • the drive power or motor power required is low. Because the method according to the invention is carried out at a low speed N, the processing or preparation of the at least one polyethylene and the oil is gentle and requires little mechanical energy. This leads to a low effectively used torque density or a low effectively used specific torque Md/a 3 .
  • Md refers in particular to a nominal drive torque.
  • a method according to claim 22 ensures a simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the comminution takes place in particular by means of a comminution device.
  • the at least one polyethylene is in the form of bulk material, for example as granules and/or powder.
  • the comminution reduces the particle size of the granules and/or the powder and/or the agglomerates.
  • the smaller the particle size of the at least one polyethylene the easier it is to mix the at least one polyethylene and the oil together to form a homogeneous melt.
  • the at least one polyethylene can be melted or plasticized more easily and/or more quickly in the multi-shaft screw machine.
  • the throughput through the multi-shaft screw machine can be increased and/or the machine size of the multi-shaft screw machine can be reduced.
  • the comminuted at least one polyethylene is the multi-shaft screw machine is heated.
  • a first preheating device is used in particular for heating.
  • a method according to claim 23 ensures simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the temperature TN of the supplied oil cools the melt in the multi-shaft screw machine, whereby the temperature of the melt at a discharge opening of the multi-shaft screw machine is reduced.
  • the supplied oil is neither heated nor cooled.
  • An oil cooling device is used in particular for cooling.
  • heated oil with a temperature To is fed into the multi-shaft screw machine through at least one first oil feed opening and unheated oil with a temperature TN is fed into the multi-shaft screw machine through at least one second oil feed opening.
  • the at least one second oil feed opening is arranged downstream of the at least one first oil feed opening in the conveying direction.
  • a method according to claim 24 ensures simple, gentle and energy-efficient production of a film for electrical energy storage.
  • the mixing takes place in particular by means of a shredding device.
  • the shredding device serves not only to shred agglomerates of the at least one polyethylene, but also to mix the at least one polyethylene with the oil.
  • the shredding device thus also serves as a mixing device or mixer.
  • a proportion of 0.1% to 10%, in particular 0.5% to 9%, and in particular 1% to 8% based on the total mass of the oil fed in is mixed or premixed with the at least one polyethylene.
  • the at least one polyethylene used for premixing and/or the oil used for premixing is heated.
  • Fig. 1 is a partially sectioned schematic view of an apparatus for producing a film for electrical energy storage according to a first embodiment
  • Fig. 2 is a partially sectioned plan view of the device in Fig. 1,
  • Fig. 3 is a section through a multi-shaft screw machine of the device along a section line III-III in Fig. 2,
  • Fig. 4 is a partially sectioned schematic view of an apparatus for producing a film for electrical energy storage according to a second embodiment with an oil cooling device
  • Fig. 5 is a partially sectioned schematic view of an apparatus for producing a film for electrical energy storage according to a third embodiment
  • Fig. 6 is a schematic view of a housing section of a multi-shaft screw machine of the device in Fig. 5,
  • Fig. 7 is a partially sectioned view of an apparatus for producing a film for electrical energy storage according to a fourth embodiment, in which polyethylene is wetted with oil before being fed into a multi-shaft screw machine,
  • Fig. 8 is a partially sectioned view of an apparatus for producing a film for electrical energy storage according to a fifth embodiment, in which polyethylene is wetted with oil before being fed into a multi-shaft screw machine, and
  • Fig. 9 is a partially sectioned schematic view of an apparatus for producing a film for electrical energy storage according to a sixth embodiment, in which a throttle device is arranged after a multi-shaft screw machine.
  • a throttle device is arranged after a multi-shaft screw machine.
  • a first embodiment of the invention is described below with reference to Figs. 1 to 3.
  • Figs. 1 to 3 show a device 1 for producing a film 2 for electrical energy storage.
  • the device 1 comprises a multi-shaft screw machine 3, a first preheating device 4 for heating polyethylene 5, a first feed device 6 for feeding the heated polyethylene 5 into the multi-shaft screw machine 3, a second preheating device 7 for heating oil 8, a second feed device 9 for feeding the heated oil 8 into the multi-shaft screw machine 3, two screening devices 10, 11, a melt pump 12, a discharge nozzle 13 and a control device 14.
  • the device 1 further comprises a comminution device 67 for comminution of the polyethylene 5.
  • the multi-shaft screw machine 3 comprises a housing 15 made up of several housing sections 17 to 25 arranged one after the other in a conveying direction 16 and connected to one another.
  • a discharge plate 35 is attached to the last housing section 25, which forms a discharge opening 36.
  • the discharge opening 36 serves to discharge a melt 66 produced from the polyethylene 5 and the oil 8.
  • the multi-shaft screw machine 3 is designed as a two-shaft screw machine rotating in the same direction.
  • two housing bores 26, 27 are formed which are parallel to one another and penetrate one another and have the shape of a horizontal figure eight in cross-section.
  • the housing bores 26, 27 each have a diameter D.
  • Two treatment element shafts 28, 29 are arranged concentrically in the housing bores 26, 27 and can rotate about associated axes of rotation 30, 31.
  • the treatment element shafts 28, 29 have a length L in the conveying direction 16.
  • the length L includes the area of the treatment element shafts 28, 29 in which treatment elements are arranged.
  • the multi-shaft screw machine 3 includes a drive motor 32 and a branching gear 34, between which a coupling 33 is arranged.
  • the treatment element shafts 28, 29 are driven in rotation in the same direction, i.e. in the same directions of rotation, about the rotation axes 30, 31.
  • the rotation axes 30, 31 have an axis distance a.
  • the ratio of the length L of the treatment element shafts 28, 29 to the diameter D of the housing bores 26, 27 is: 30 ⁇ L/D ⁇ 85, in particular 35 ⁇ L/D ⁇ 80, in particular 40 ⁇ L/D ⁇ 75, in particular 45 ⁇ L/D ⁇ 70, in particular 50 ⁇ L/D ⁇ 65, and in particular 55 ⁇ L/D ⁇ 60.
  • the multi-shaft screw machine 3 has, in the conveying direction 16, a first feed zone 37, a first mixing zone 38, a second feed zone 39, a second mixing zone 40, a third feed zone 41, a third mixing zone 42 and a pressure build-up zone 43.
  • a polyethylene feed opening Zp is formed in the housing section 17, which opens into the housing bores 26, 27.
  • the powdered polyethylene 5 is fed into the housing bores 26, 27 of the multi-shaft screw machine 3 through the polyethylene feed opening Zp.
  • the comminution device 67 is used to comminute the powdered polyethylene 5.
  • the powdered polyethylene forms, for example, agglomerates and/or has powder particles that have an undesirably large particle size.
  • the comminution device 67 is used to destroy or break up any agglomerates and/or to comminute powder particles with an undesirably large particle size.
  • the comminution device 67 comprises a housing 68 in which at least one comminution element 69 is arranged.
  • the at least one comminution element 69 is in particular driven in rotation relative to the housing 68 by means of a drive.
  • the comminution device 67 is arranged in front of the first preheating device 4.
  • the first preheating device 4 serves to heat the comminuted powdered polyethylene 5 so that it is fed at a temperature Tp through the polyethylene feed opening Zp into the multi-shaft screw machine 3.
  • the first preheating device 4 comprises, for example, a bulk material heat exchanger and/or a heating screw machine.
  • the first preheating device 4 opens into the first feed device 6, which serves for the metered feeding of the heated powdered polyethylene 5.
  • the first feed device 6 comprises, for example, a gravimetric doser.
  • the first feed device 6 opens into the polyethylene feed opening Zp.
  • three first oil supply openings are formed in the housing section 18, which are individually designated with Z01, Z012, Z013 and together with Z01.
  • the second intake zone 39 three second oil supply openings are formed in the housing section 20, which are individually designated with Z021, Z022, Z023 and together with Z02. Furthermore, in a corresponding manner, in the third intake zone 41, three third oil supply openings are formed in the housing section 22, which are individually designated with Z031, Z032, Z033 and together with Z03.
  • the arrangement of the oil supply openings Z01, Z02 and Z03 is explained in more detail below.
  • the second preheating device 7 serves to preheat the oil 8 so that the oil 8 at a temperature To is fed through the oil feed openings Z01, Z02 and Z03 into the housing bores 26, 27 of the multi-shaft screw machine 3.
  • the second preheating device 7 comprises, for example, a heat exchanger or electrical resistance heating cartridges.
  • the second preheating device 7 is connected to the second feed device 9, which serves to feed the heated oil 8 through the oil feed openings Z01, Z02 and Z03 into the housing bores 26, 27.
  • the second feed device 9 comprises a distribution line 44, which connects the second preheating device 7 to metering pumps 45, 46, 47.
  • a first metering pump 45 is in turn connected via a distribution line 48 to the first oil feed openings Z011, Z012 and Z013. Accordingly, a second metering pump 46 is connected via a distribution line 49 to the second oil supply openings Z021, Z022 and Z023 and a third metering pump 47 is connected via a distribution line 49 to the third oil supply openings Z031, Z032 and Z033.
  • the second oil supply openings Z02 are arranged in the conveying direction 16 after the first oil supply openings Z01 and are at a distance LA relative to these in the conveying direction 16.
  • the third oil supply openings Z03 are correspondingly arranged in the conveying direction 16 after the second oil supply openings Z02 and are at a distance LA from these.
  • the distances LA can be the same or different. The following applies in particular: 5 ⁇ LA/D ⁇ 45, in particular 10 ⁇ LA/D ⁇ 40, in particular 15 ⁇ LA/D ⁇ 35, and in particular 20 ⁇ LA/D ⁇ 30.
  • the housing bores 26, 27 or an inner wall of the housing 15 delimiting the housing bores 26, 27 has a circumferential contour U which has the shape of a horizontal figure eight.
  • the circumferential The circumferential contour U defines a first, upper region So and a second, lower region Su between the rotation axes 30, 31.
  • the regions So and Su are also referred to as gusset regions or penetration regions of the housing bores 26, 27.
  • the circumferential contour U defines a first side region SL and a second side region SR.
  • the oil supply opening Zon is formed in the upper region So, whereas the oil supply opening Z012 is formed in the first side region SL and the oil supply opening Z013 is formed in the second side region SR.
  • the oil supply openings Z011, Z012, Z013 are thus distributed along the circumferential contour U and arranged at three different positions so that they open into the housing bores 26, 27 at three different positions along the circumferential contour U. This is illustrated in Figs. 2 and 3.
  • the treatment element shafts 28, 29 comprise conveying elements 53, 53' in the first intake zone 37, kneading elements 54, 54' in the first mixing zone 38, conveying elements 55, 55' in the second intake zone 39, kneading elements 56, 56' in the second mixing zone 40, conveying elements 57, 57' in the third intake zone 41, kneading elements 58, 58' and mixing elements 59, 59' in the third mixing zone 42, and conveying elements 60, 60' in the pressure build-up zone 43.
  • the kneading elements 54, 54', 56, 56', 58, 58' are designed, for example, as individual kneading disks and/or as at least one kneading block with several kneading disks connected to one another in one piece.
  • the conveying elements 53, 53', 55, 55', 57, 57', 60, 60', the kneading elements 54, 54', 56, 56', 58, 58' and the mixing elements 59, 59' are collectively referred to as treatment elements.
  • the treatment element shafts 28, 29 have profiled shafts 51, 52 on which the treatment elements 53, 53' to 60, 60' are attached one after the other in the conveying direction 16.
  • the conveying elements 53, 55, 57, 60, the kneading elements 54, 56, 58 and the mixing elements 59 are arranged on the shaft 51 and are part of the treatment element shaft 28, whereas the conveying elements 53', 55', 57', 60', the kneading elements 54', 56', 58' and the mixing elements 59' are arranged on the Shaft 52 and are part of the treatment element shaft 29.
  • the treatment element shafts 28, 29 are designed to mesh closely with one another. Treatment elements with corresponding reference numerals, which only differ by a ', are arranged adjacent to one another and mesh closely with one another. This is illustrated, for example, for the kneading elements 54, 54' in Fig. 3.
  • the treatment elements 53, 53' to 60, 60' are designed with two flights. This means that the treatment elements 53, 53' to 60, 60' each have a first comb Ki and a second comb K2 opposite the respective axis of rotation 30 or 31.
  • the treatment elements 53, 53' to 60, 60' can have a different number of flights or number of combs k.
  • the number of flights or number of combs k of the mixing elements 59, 59' can differ from the number of combs k of the conveying elements 53, 53', 55, 55', 57, 57', 60, 60' and/or the kneading elements 54, 54', 56, 56', 58, 58'.
  • the treatment element shafts 28, 29 or the respective treatment elements 53, 53' to 60, 60' have an outer diameter D a and a core diameter Di.
  • the treatment elements 53, 53' to 60, 60' which have a ratio D a /Di according to the invention, define a total length LM.
  • the circumferential contour U of the housing bores 26, 27 delimits a cross-sectional area A.
  • the housing 15 and the treatment element shafts 28, 29 or the treatment elements 53, 53' to 60, 60' delimit a free cross-sectional area AF between them.
  • the free cross-sectional area AF is illustrated in Fig. 3.
  • the multi-shaft screw machine 3 comprises a heating device 61.
  • the heating device 61 serves to heat the housing 15 in a heating area.
  • the heating area has a length Lu in the conveying direction 16.
  • the heating device 61 comprises several heating elements 62 which are attached to the housing sections 17 to 22 and form the heating area.
  • the heating device 61 is designed to be electrical, for
  • the multi-shaft screw machine 3 also comprises a cooling device 63 for cooling the melted polyethylene 5 and the oil 8 or the melt 66.
  • the cooling device 63 forms a cooling area.
  • the cooling area has a length LK in the conveying direction 16.
  • the cooling device 63 comprises cooling channels 64 which are formed in the housing sections 23 to 25 and define the cooling area.
  • the cooling channels 64 are connected to a cooling unit 65 which conveys a cooling fluid through the cooling channels 64.
  • the polyethylene 5 located in the housing bores 26, 27 and the oil 8 or the melt 66 are cooled by the cooling fluid.
  • LH/LK ratio 0.5 ⁇ LH/LK ⁇ 3, in particular 0.75 ⁇ LH/LK ⁇ 2.5, and in particular 1 ⁇ LH/LK ⁇ 2.
  • the first screening device 10 is arranged in the conveying direction 16 after the multi-shaft screw machine 3.
  • the first screening device 10 is designed as a coarse screening device.
  • the melt pump 12 is arranged in the conveying direction 16 after the first screening device 10 or between the first screening device 10 and the second screening device 11.
  • the second screening device 11 is designed as a fine screening device.
  • the coarse screening device is designed, for example, as a breaker plate.
  • the fine screening device is designed, for example, as a disk filter or candle filter.
  • the screening devices 10, 11 can be designed as screen changing devices.
  • the melt pump 12 serves to build up pressure and convey the melt 66 through the second screening device 11.
  • the second screening device 11 is arranged after the melt pump 12 in the conveying direction 16.
  • the melt pump 12 is designed, for example, as a gear pump.
  • the discharge nozzle 13 is arranged in the conveying direction 16 after the second screening device 11.
  • the discharge nozzle 13 is used to produce the film 2 from the melt 66 that was produced in the multi-shaft screw machine 3 from the polyethylene 5 and the oil 8.
  • the discharge nozzle 13 is designed as a slot nozzle.
  • the control device 14 serves to control the multi-shaft screw machine 3, the comminution device 67, the first preheating device 4, the first feed device 6, the second preheating device 7, the second feed device 9, the screening devices 10, 11 and the melt pump 12.
  • the control device 14 is in particular in signal connection with the drive motor 32, the preheating devices 4, 7, the first feed device 6, the metering pumps 45, 46, 47 of the second feed device 9, the screening devices 10, 11 and the melt pump 12.
  • the powdered polyethylene 5 is first comminuted by means of the comminution device 67. Any agglomerates present are destroyed or broken up and/or any powder particles that have an undesirably large particle size are comminuted.
  • the comminuted powdered polyethylene 5 is heated by means of the first preheating device 4 and fed by means of the first feed device 6 through the polyethylene feed opening Zp into the housing bores 26, 27 of the multi-shaft screw machine 3.
  • the heated polyethylene 5 has the temperature Tp when fed, where in particular: 20 °C ⁇ Tp ⁇ 120 °C, in particular 40 °C ⁇ Tp ⁇ 100 °C, and in particular 60 °C ⁇ Tp ⁇ 80 °C.
  • the oil 8 is heated by means of the second preheating device 7 and fed by means of the second feed device 9 through the oil feed openings Zoi, Z02 and Z03 into the housing bores 26, 27.
  • the oil 8 has the temperature To when fed, where in particular the following applies: 30 °C ⁇ To ⁇ 110 °C, in particular 40 °C ⁇ To ⁇ 100 °C, in particular 50 °C ⁇ To ⁇ 90 °C, and in particular 60 °C ⁇ To ⁇ 80 °C. For example the following applies: 80 °C ⁇ To ⁇ 100 °C.
  • the first intake zone 37 a first portion of the oil 8 is fed through the feed openings Zon, Z012, Zoi3 from different sides into the housing bores 26, 27, so that the polyethylene 5 is wetted with the oil 8 from different sides.
  • the powdered polyethylene 5 and the oil 8 are conveyed to the first mixing zone 38.
  • the powdered polyethylene 5 and the oil 8 are at least partially mixed with one another.
  • the powdered polyethylene 5 is at least partially melted and further mixed with the oil 8.
  • mechanical energy is introduced into the polyethylene 5 and the oil 8 by means of the kneading elements 54, 54'.
  • the treatment element shafts 28, 29 are each driven in rotation by means of the drive motor 32 and the branching gear 34 at a speed N and a torque Md.
  • the second intake zone 39 a second portion of the oil 8 is fed through the oil feed openings Z021, Z022, Zo23 from different sides into the housing bores 26, 27, so that the polyethylene 5 is wetted from different sides with the oil 8.
  • the second mixing zone 40 any polyethylene 5 that has not yet melted is melted by mechanical energy input by means of the kneading elements 56, 56' and the oil 8, in particular the oil 8 fed in the second intake zone 39, is mixed with the melted polyethylene 5.
  • a third portion of the oil 8 is fed through the feed openings Z031, Zo32, Zo33 from different sides into the housing bores 26, 27, so that the polyethylene 5 is wetted with the oil 8 from different sides.
  • the melted polyethylene 5 or the polyethylene melt is further mixed with the oil 8, in particular with the oil 8 supplied in the third feed zone 41, by means of the kneading elements 58, 58' and the mixing elements 59, 59' to form the homogeneous melt 66.
  • the housing 15 is heated in the heating area by means of the heating device 61, so that thermal energy is supplied to the polyethylene 5 and the supplied oil 8 via the housing 15. As a result, less mechanical energy has to be supplied to the polyethylene 5 and the oil 8 by means of the treatment element shafts 28, 29, which makes the processing gentle.
  • the melt 66 produced is cooled by means of the cooling device 63.
  • the cooling device 63 conveys a cooling fluid through the cooling channels 64 so that thermal energy is extracted from the melt 66.
  • the cooling unit 65 removes the thermal energy from the cooling fluid again. By cooling the melt 66, thermal impairment is avoided. By lowering the temperature of the melt 66, the throughput can be increased in particular.
  • the multi-shaft screw machine 3 Due to the ratio Da/Di, the multi-shaft screw machine 3 has a comparatively high free cross-sectional area AF and the housing bores 26, 27 therefore have a comparatively high free volume.
  • the polyethylene 5 and the oil 8 are subjected to low shear, in particular a low shear force and/or a low shear rate y, so that the mechanical energy input into the multi-shaft screw machine 3 is low when the polyethylene 5 and the oil 8 are well mixed.
  • the polyethylene 5 and the oil 8 or the melt 66 produced therefrom are not thermally affected or damaged to a relevant extent. Due to the length L of the treatment element shafts 28, 29, the residence time tv of the polyethylene 5 in the multi-shaft screw machine 3 is comparatively high.
  • the low speed N in conjunction with the ratio Da/Di and the resulting high free cross-sectional area AF or the high free volume ensure a low shear rate y. This promotes a low thermal load on the polyethylene 5 and the oil 8 due to the mechanical energy input. Because the polyethylene 5 is fed into the multi-shaft screw machine 3 at the temperature Tp and the oil 8 at the temperature To, less mechanical energy is required in the multi-shaft screw machine 3.
  • the feeding of the oil 8 at different positions along the circumferential contour U of the housing bores 26, 27 enables wetting of the polyethylene 5 from different sides, so that the production of the homogeneous melt 66 is simplified.
  • the oil 8 is finely dispersed in the melted polyethylene 5 or the polyethylene melt.
  • the melt 66 comprises 15 vol.% to 50 vol.% polyethylene 5 and 50 vol.% to 85 vol.% oil 8, in particular 20 vol.% to 35 vol.% polyethylene and 65 vol.% to 80 vol.% oil.
  • the first proportion of oil 8 is in particular 40% to 80%, in particular 55% to 75%, whereas the subsequently added proportion or proportions of oil 8 are 20% to 60%, in particular 25% to 45%. Fillers and/or additives that are not taken into account in the aforementioned volume proportions can be mixed into the melt 66.
  • the pressure in the melt 66 is increased so that the melt 66 is conveyed through the first screening device 10.
  • the first screening device 10 any agglomerates present in the melt 66 are caught and/or broken up so that the melt pump 12 is protected.
  • the melt 66 is then conveyed through the second screening device 11 by means of the melt pump 12 and cleaned or filtered and any agglomerates are broken up.
  • the second screening device 11 is designed as a fine screening device
  • the first screening device 10 is designed as a coarse screening device.
  • the cleaned melt 66 is then discharged through the discharge nozzle 13 and the film 2 is thus produced.
  • the film 2 is then smoothed, cooled and/or stretched in the usual way.
  • the film 2 then passes through a solvent bath so that the finely dispersed oil 8 in the film 2 is washed out in order to expose the pore structure formed in the polyethylene 5.
  • the film 2 serves as a so-called separator film and is used to produce electrical energy storage devices, such as lithium-ion batteries or lithium-ion accumulators.
  • a second embodiment of the invention is described below with reference to Fig. 4. In contrast to the first embodiment, the second feed device 9 is only partially connected to the second preheating device 7.
  • heated oil 8 is fed via the distributor line 44, the first metering pump 45 and the distributor line 48 into the first oil feed openings Z01, Z012 and Z013 and via the distributor line 44, the second metering pump 46 and the distributor line 49 into the second oil feed openings Z021, Z022 and Z023.
  • oil 8 is fed via a supply line 70 to an oil cooling device 71 and cooled there.
  • the unheated or cooled oil 8 is fed into the third oil supply openings Z031, Z032 and Z033 via a distributor line 44', the third metering pump 47 and the distributor line 50.
  • the oil cooling device 71 and the distributor line 44' branch off from the supply line 70 before the second preheating device 7, so that the distributor line 44' bypasses the second preheating device 7.
  • no heating elements are arranged in the third intake zone 41.
  • the melt 66 is cooled by feeding unheated or cooled oil 8 into the housing bores 26, 27 through the third oil supply openings Z031, Z032 and Z033.
  • the unheated or cooled oil 8 has, for example, a temperature TN of less than 60°C, in particular of at most 40°C. In particular, the following applies: 5°C ⁇ TN ⁇ 40°C, in particular 10°C ⁇ TN ⁇ 35°C, and in particular 15°C ⁇ TN ⁇ 30°C.
  • the housing sections 18 to 25 each comprise a housing shell 72 and an associated sleeve 73, which is arranged in the housing shell 72.
  • the respective sleeve 73 delimits the housing bores 26, 27 in sections.
  • the housing sections 18 to 25 are designed to correspond to one another, with the housing sections 18, 20 and 22 additionally comprising the oil supply openings Z01, Z02 and Z03 in comparison to the housing sections 19, 21 and 23 to 25.
  • the housing section 18 is described in detail below using Fig. 6 as an example.
  • the housing casing 72 and the sleeve 73 together form a first fluid channel 74 and a second fluid channel 75.
  • the fluid channels 74, 75 are arranged one after the other in the conveying direction 16.
  • the fluid channels 74, 75 run spirally around the housing bores 26, 27 and the treatment element shafts 28, 29 arranged therein.
  • the fluid channels 74, 75 have a maximum channel width or a diameter DF. Adjacent turns of the fluid channels 74, 75 are spaced apart Aw in the conveying direction 16.
  • the fluid channels 74, 75 have, for example, a number W of turns together, where the following applies: 4 ⁇ W ⁇ 40, in particular 8 ⁇ W ⁇ 30, and in particular 12 ⁇ W ⁇ 20.
  • the sleeve 73 has a higher thermal conductivity X than the housing shell 72.
  • a spiral-shaped first groove 76 is formed on an outer wall of the sleeve 73.
  • a spiral-shaped second groove 77 is formed on the outer wall of the sleeve 73.
  • a first supply opening 78 and a first discharge opening 79 are formed in the housing shell 72, which open into the first fluid channel 74 at opposite ends.
  • a second supply opening 80 and a second discharge opening 81 are formed in the housing shell 72, which open into the second fluid channel 75 at opposite ends.
  • the housing sections 18 to 22 serve to heat the polyethylene 5 and the oil 8 located in the housing bores 26, 27.
  • the heating device 61 comprises a Heating unit 82.
  • the respective heating unit 82 is connected to the feed openings 78, 80 via a feed line 83 and to the discharge openings 79, 81 via a discharge line 84.
  • the respective heating unit 82 can heat the housing sections 18 to 22 individually via a temperature of the heated fluid F.
  • the housing sections 23 to 25 are used for cooling.
  • the cooling device 63 comprises a cooling unit 65 for each housing section 23 to 25.
  • the respective cooling unit 65 is connected to the supply openings 78, 80 via a supply line 85 and to the discharge openings 79, 81 via a discharge line 86.
  • a respective fluid F is individually cooled to a temperature by the cooling units 65, so that the housing sections 23 to 25 through which the respective cooled fluid F flows are individually cooled.
  • a fourth exemplary embodiment of the invention is described below with reference to Fig. 7.
  • a portion of the heated oil 8 is mixed with the polyethylene 5 so that the polyethylene 5 is wetted with the oil 8.
  • the housing 68 of the comminution device 67 has a polyethylene feed opening 87 and an oil feed opening 88.
  • the first preheating device 4 is connected to the polyethylene feed opening 87 so that heated polyethylene 5 is fed into the comminution device 67.
  • the oil feed opening 88 is connected to the second preheating device 7 via a fourth metering pump 89.
  • Comminution elements 69 are arranged in the housing 68 and can be driven in rotation about an axis of rotation 91 by means of a drive 90.
  • the rotating crushing elements 69 crush agglomerates formed by the polyethylene 5 on the one hand and mix the polyethylene 5 with the supplied oil 8 on the other.
  • the crushing device 67 thus also acts as a mixing device or mixer.
  • the polyethylene 5 wetted with the oil 8 is fed into the multi-shaft screw machine 3 by means of the first feed device 6. Wetting the polyethylene 5 improves the intake behavior of the multi-shaft screw machine 3.
  • the pre-wetted polyethylene 5 can be more easily mixed into the oil fed into the multi-shaft screw machine 3. 8.
  • a fifth embodiment of the invention is described below with reference to Fig. 8.
  • the comminution device 67 is arranged between the first feed device 6 and the multi-shaft screw machine 3.
  • the first feed device 6 is thus arranged between the first preheating device 4 and the comminution device 67.
  • the polyethylene 5 is heated by means of the first preheating device 4 and fed directly to the first feed device 6.
  • the first feed device 6 is connected to the polyethylene feed opening 87 of the comminution device 67.
  • the heated polyethylene 5 passes from the first feed device 6 via the polyethylene feed opening 87 into the comminution device 67.
  • a portion of the heated oil 8 is fed to the comminution device 67 via the oil feed opening 88, in accordance with the previous embodiment.
  • the shredding device 67 the heated polyethylene 5 and the heated oil 8 are mixed with one another in the manner already described and agglomerates formed by the polyethylene 5 are shredded.
  • the shredding device 67 is directly connected to the multi-shaft screw machine 3.
  • the shredding device 67 thus opens directly into the polyethylene feed opening Zp. Because the shredding device 67 is arranged between the first feed device 6 and the multi-shaft screw machine 3, only the shredding device 67 and not the first feed device 6 is exposed to the oil 8.
  • the device 1 comprises a throttle device 92, which is arranged in the conveying direction 16 after the multi-shaft screw machine 3.
  • the throttle device 92 comprises a housing 93, in which a passage channel 94 is formed.
  • a throttle body 95 is arranged in the passage channel 94, which is controlled by means of a Drive 96 is rotatably driven about a rotational axis 97.
  • a free cross-sectional area of the passage channel 94 is adjustable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un dispositif destiné à la fabrication d'un film pour accumulateur d'énergie électrique, ledit dispositif comprenant une machine à vis multi-arbres (3) servant à produire une masse fondue à partir d'au moins un polyéthylène (5) et d'une huile (8). La machine à vis multi-arbres (3) comprend un carter (15) dans lequel sont ménagés des alésages (26, 27) à l'intérieur desquels sont disposés des arbres à éléments de traitement (28, 29) destinés à mélanger ledit au moins un polyéthylène (5) et l'huile (8). Les arbres à éléments de traitement (28, 29) comprennent chacun plusieurs éléments de traitement (54, 54'), l'équation suivante s'appliquant à au moins un élément de traitement (54, 54') par arbre à éléments de traitement (28, 29) : Da/Di ≥ 1,4. Da désigne un diamètre extérieur et Di un diamètre de la partie centrale des éléments de traitement (54, 54'). On garantit ainsi une préparation avec ménagement et économe en énergie.
PCT/EP2024/060089 2023-04-13 2024-04-12 Dispositif et procédé de fabrication d'un film pour accumulateur d'énergie électrique Pending WO2024213770A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202480025428.3A CN121079189A (zh) 2023-04-13 2024-04-12 用于生产用于电能存储系统的薄膜的装置和方法

Applications Claiming Priority (2)

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DE102023203382.8 2023-04-13
DE102023203382.8A DE102023203382A1 (de) 2023-04-13 2023-04-13 Vorrichtung und Verfahren zur Herstellung einer Folie für elektrische Energiespeicher

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WO2024213770A1 true WO2024213770A1 (fr) 2024-10-17

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CN (1) CN121079189A (fr)
DE (1) DE102023203382A1 (fr)
WO (1) WO2024213770A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10100224A (ja) * 1996-09-30 1998-04-21 Nippon Muki Co Ltd 電池用セパレータの製造方法
EP3281767A1 (fr) 2016-08-11 2018-02-14 Coperion GmbH Procede et dispositif de fabrication d'une feuille pour dispositif de stockage d'energie electrique
US10207424B2 (en) * 2014-07-11 2019-02-19 Covestro Deutschland Ag Mixing elements having an improved dispersing effect
EP4350795A1 (fr) * 2022-10-05 2024-04-10 Coperion GmbH Installation de traitement et procédé de traitement d'un matériau accumulateur d'énergie

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5017455B2 (ja) * 2007-10-19 2012-09-05 東レバッテリーセパレータフィルム合同会社 ポリマーと希釈剤の混合物を調製するための押出機、システム、及び方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10100224A (ja) * 1996-09-30 1998-04-21 Nippon Muki Co Ltd 電池用セパレータの製造方法
US10207424B2 (en) * 2014-07-11 2019-02-19 Covestro Deutschland Ag Mixing elements having an improved dispersing effect
EP3281767A1 (fr) 2016-08-11 2018-02-14 Coperion GmbH Procede et dispositif de fabrication d'une feuille pour dispositif de stockage d'energie electrique
EP4350795A1 (fr) * 2022-10-05 2024-04-10 Coperion GmbH Installation de traitement et procédé de traitement d'un matériau accumulateur d'énergie

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CN121079189A (zh) 2025-12-05

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