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WO2021152163A1 - Dispositif mélangeur destiné à former un mélange de fibres minérales et de liants, installation de production d'un mat de fibres minérales et procédé de production d'un mélange de fibres minérales et de liants - Google Patents

Dispositif mélangeur destiné à former un mélange de fibres minérales et de liants, installation de production d'un mat de fibres minérales et procédé de production d'un mélange de fibres minérales et de liants Download PDF

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Publication number
WO2021152163A1
WO2021152163A1 PCT/EP2021/052229 EP2021052229W WO2021152163A1 WO 2021152163 A1 WO2021152163 A1 WO 2021152163A1 EP 2021052229 W EP2021052229 W EP 2021052229W WO 2021152163 A1 WO2021152163 A1 WO 2021152163A1
Authority
WO
WIPO (PCT)
Prior art keywords
mineral
mineral fibers
fiber
fibers
conveying
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.)
Ceased
Application number
PCT/EP2021/052229
Other languages
German (de)
English (en)
Inventor
Matthias Graf
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.)
Dieffenbacher GmbH Maschinen und Anlagenbau
Original Assignee
Dieffenbacher GmbH Maschinen und Anlagenbau
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 Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen und Anlagenbau
Publication of WO2021152163A1 publication Critical patent/WO2021152163A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • D04H1/4226—Glass fibres characterised by the apparatus for manufacturing the glass fleece
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/655—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions characterised by the apparatus for applying bonding agents
    • 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
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/78—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant by gravity, e.g. falling particle mixers
    • 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
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • B29B7/905—Fillers or reinforcements, e.g. fibres with means for pretreatment of the charges or fibres
    • 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

Definitions

  • MINERAL FIBERS AND BINDERS PLANT FOR PRODUCING A MINERAL FIBER MAT AND PROCESS FOR PRODUCING A MIXTURE OF MINERAL FIBERS AND BINDERS
  • the invention relates to a mixing device for producing a mixture of mineral fibers and binding agents in the course of the production of mineral fiber boards, with at least one comminution device for comminuting mineral fiber agglomerates.
  • the invention also relates to a system for producing mineral fiber mats from a mixture of mineral fibers and binding agents on a molding belt in the course of the production of mineral fiber boards, with at least one conveyor device for conveying the mineral fibers and with at least one comminution device for comminuting mineral fiber agglomerates.
  • the invention also relates to a method for producing a mixture of mineral fibers and binding agents in the course of the production of mineral fiber boards, in which mineral fiber agglomerates are comminuted.
  • a method for producing a mineral fiber-containing composite material and the novel mineral fiber-containing element produced by this method are known.
  • the method relates in particular to elements containing mineral fibers, which are produced by pressing and curing a mixture of mineral fibers and binding agent to produce a pressed board, often with a thickness of 4 mm to 25 mm.
  • These panels generally have a density of 120 kg / m 3 to 1000 kg / m 3 , such as 170 kg / m 3 to 1000 kg / m 3 and can be used as protective cladding on the outside of buildings or as sound-insulating / absorbent ceiling or Wall panels are used.
  • a fiber-forming apparatus and a collector are configured to have a Carrying mineral fiber web to the inlet channel, a binder feed is positioned so that it feeds the mineral fibers to the inlet channel.
  • the apparatus comprises an inlet channel for starting materials, for example binding agents and mineral fibers, and for specific raw materials the apparatus can comprise a shredder at the inlet channel in order to at least partially shred bulky material.
  • the invention is based on the object of designing a mixing device, a system and a method of the type mentioned at the outset, in which a more uniform mixing of the mineral fibers and the binders can be achieved.
  • the object is achieved according to the invention with the mixing device in that at least one comminution device for comminuting mineral fiber agglomerates has at least one fiber opener for removing mineral fibers from mineral fiber agglomerates and at least one binding agent introduction device is functionally provided immediately behind at least one ejection of at least one fiber opener, with which binder can be introduced into the conveying path of the dissolved mineral fibers.
  • the mixing device has at least one fiber opener with which mineral fibers can be extracted from mineral fiber agglomerates.
  • the mineral fiber agglomerates are crushed by breaking them down into their constituent parts, namely mineral fibers.
  • the mineral fibers that have been removed are conveyed at a distance from one another behind the ejection of the fiber opener.
  • At least one binding agent introduction device is provided on or in the conveying path of the dissolved mineral fibers. With the at least one binding agent introduction device, binding agent is introduced into the conveying path and mixed with the mineral fibers. The binding agent can adhere to the mineral fibers, so that the mineral fibers are wetted with binding agent.
  • the binder can advantageously be introduced as close as possible to the at least one ejection of the at least one fiber opener.
  • the dissolved mineral fibers can be provided with binding agent in an area in which the mineral fibers are spaced apart from one another. In this way, a more even mixture between the mineral fibers and the binding agent can be achieved overall.
  • the binder can advantageously be a liquid binder, in particular glue.
  • the mineral fibers can be evenly wetted with liquid binders. In this way, the mineral fibers can be homogeneously wetted with binder particles.
  • the binding agent is introduced immediately after the mineral fibers have been dissolved out, the risk of the mineral fibers being reunited can be reduced. In this way, even extremely fine mineral fibers can be mixed evenly with binders. A renewed combination of the finely dissolved mineral fibers before or during the introduction of the binder can lead to the binder particles not being able to get into the interior of the fiber clumps.
  • the fiber lumps made of mineral fibers can only be glued on the surface. In the interior of the fiber clumps, however, there is no bond between the mineral fibers. This can lead to impairments during the subsequent processing of the mixture of mineral fibers and binding agents.
  • mineral fibers from different types of rock in particular basalt, dolomite, feldspar, and slag, in particular from blast furnaces in steel production, can be mixed evenly with binders.
  • the mineral fibers can advantageously have slag fibers, recycled fibers and / or new fibers.
  • mineral fibers with a very small diameter in particular between 3 ⁇ m and 15 ⁇ m, can also be mixed uniformly with binders. Staple fibers with a length of 1 mm to 25 mm can be processed into mineral fiber mats and later into mineral fiber boards.
  • the binder can have one component or several components.
  • Thermoset binders can be used as binders.
  • reactive resin systems based on phenol-formaldehyde or isocyanate can be used as binders.
  • a binder content of 5% to 15% based on the dry fiber mass of the mineral fibers can be introduced.
  • the mixture of mineral fibers and binders can be brought onto a molding belt, in particular sprinkled.
  • a mineral fiber mat can be produced from the mixture on the molding tape.
  • the mineral fiber mat can then be pressed with a press arrangement to form mechanically stable, in particular rigid mineral fiber boards with an adjustable modulus of elasticity.
  • the mineral fiber boards produced with the aid of the invention can in particular be used as protective cladding on ceilings and walls of buildings.
  • mineral fiber boards can also be produced with the invention, which have sound and / or heat insulating / absorbing properties.
  • a feed chute of the at least one fiber opener and / or the at least one fiber opener can be designed according to a desired spread on the forming belt. In this way, a more even distribution on the forming belt can be achieved.
  • At least one fiber opener can have at least one rotatably drivable roller which is arranged in a conveying path for mineral fiber agglomerates and which has a plurality of projections, in particular webs and / or needles or the like, which are located on the outside of the at least one roller Are arranged distributed circumferentially.
  • mineral fibers can be separated from mineral fiber agglomerates, in particular torn, by means of the projections during the rotation of the at least one roller.
  • At least one fiber opener can have at least two rotatably drivable rollers whose axes of rotation run parallel to one another and which delimit a passage gap for mineral fibers on opposite sides. In this way, mineral fiber agglomerates and / or dissolved mineral fibers can be passed between the at least two rollers.
  • At least two of the rollers in particular two web rollers, can be driven in opposite directions of rotation.
  • mineral fiber agglomerates can be actively conveyed through the passage gap.
  • At least two of the rollers can be driven in the same direction of rotation.
  • mineral fibers can be torn out more easily from mineral fiber agglomerates.
  • the axes of rotation of the rollers can advantageously run transversely, in particular perpendicular, to a conveying direction of the forming belt to which the mixture of mineral fibers and binding agent is to be applied to form a mineral fiber mat. In this way, the spreading width and the spreading direction on the forming tape can be specified.
  • At least one fiber opener can have at least three rotatably drivable rollers, with at least two web rollers equipped with webs delimiting at least one passage gap for mineral fiber agglomerates on opposite sides and at least one knockdown roller being functionally arranged behind the at least two web rollers. With the rotating web rollers, mineral fiber agglomerates can be conveyed to the at least one chopping roller.
  • the at least two web rollers can advantageously be driven in opposite directions of rotation. In this way, mineral fiber agglomerates can be actively transported.
  • mineral fibers can be torn out of mineral fiber agglomerates.
  • the at least one chopping roller can advantageously be implemented as a needle roller which has a plurality of needles on its peripheral side. With the needles, mineral fibers can be torn out of mineral fiber agglomerates better.
  • At least one chopping roller and at least one of the web rollers can be driven to rotate in the same direction of rotation.
  • mineral fibers can be torn out of mineral fiber agglomerates even better.
  • at least one chopping roller can be driven to rotate at a higher speed than the web rollers. In this way, mineral fiber agglomerates can be retained between the two web rollers, while the mineral fibers are torn out with the at least one chopping roller.
  • At least one conveying channel for conveying detached mineral fibers can be arranged immediately behind an ejection of at least one fiber opener.
  • the released mineral fibers can be conveyed on the fly, in particular at a distance from one another. In this way, the mineral fibers can be prevented from reconnecting.
  • At least one binding agent introduction device can open into at least one conveying channel.
  • the binding agent can be introduced directly into the at least one conveying channel.
  • At least one conveying channel can expand at least in sections in at least one dimension transversely to the conveying direction of the mineral fibers from an ejection of at least one fiber opener and / or at least one conveying channel can have a constant cross-section at least in sections transversely to the conveying direction of the mineral fibers and / or at least one conveying channel can be curved at least in sections.
  • the at least one conveying channel can advantageously be designed at least in sections in the manner of a Venturi tube. In this way a more uniform flow can be achieved. With the help of the more even flow, a better mixing of the binding agent with the dissolved mineral fibers can be achieved. This enables the binding agent to better reach the free areas between the mineral fibers and to wet the mineral fibers more evenly.
  • the expansion is also associated with the fact that the load per m 3 is reduced and thus the individual fibers can be more easily glued homogeneously.
  • the course of the at least one conveying channel can be adapted to a trajectory of the mineral fibers that have been detached.
  • the course of the at least one conveying channel can be adapted to the corresponding trajectory being. In this way it can be avoided that the mineral fibers hit the walls of the at least one conveyor channel.
  • At least one wall of the at least one conveying channel can have a plurality of gas passage holes. Gas, in particular air, for example from the environment into the interior of the at least one can pass through the gas passage holes Conveying channel arrive. In this way, a slight gas flow away from the at least one wall towards the interior of the at least one conveying channel can be achieved, with which mineral fibers and / or binding agents dissolved out in the interior of the at least one conveying channel are kept away from the at least one wall. In this way it can be prevented that mineral fibers and / or binders are deposited on the at least one wall.
  • At least one of the gas passage holes can be designed as an inlet nozzle for gas, in particular external air.
  • the gas can be introduced into the at least one delivery channel in a more targeted manner.
  • inlet nozzles With inlet nozzles, a stream of mineral fibers can be better formed in the at least one conveying channel.
  • At least one gas passage hole in particular the inlet nozzle, can advantageously be adjustable. In this way, a gas supply can be adapted from the outside.
  • a gas pressure, in particular air pressure, within the at least one delivery channel can advantageously be lower than a gas pressure outside the at least one delivery channel. In this way, a pressure gradient can be generated which causes a gas flow from outside the at least one delivery channel through the through-holes into the interior of the delivery channel.
  • At least one conveying channel can be connected directly or indirectly to at least one gas flow generating device with which a gas flow for conveying dissolved mineral fibers and possibly binding agent can be generated in the at least one conveying channel.
  • the at least one gas flow generating device can advantageously have at least one suction means for gas, in particular a fan, a pump or the like. In this way, the gas can be sucked off in the at least one delivery channel.
  • the at least one gas flow generating device in the form of a suction means can advantageously be located on the side of the outlet of the at least one conveying channel facing away from the at least one fiber opener. In this way, the gas in the at least one conveying channel can be sucked away from the at least one fiber opener.
  • At least one suction point of a suction means can be spatially located below a gas-permeable conveyor belt, in particular a forming belt or a vacuum belt, on which the mixture of binding agent and mineral fibers is to be arranged.
  • the mixture can be shaped into a mineral fiber mat on a molding belt.
  • the mixture can be sucked in on a vacuum belt by means of negative pressure and conveyed further.
  • the forming belt can also be designed as a vacuum belt.
  • the suction point can be located on the side of the gas-permeable conveyor belt, in particular the forming belt or the vacuum belt, opposite an exit of the at least one conveying channel.
  • the gas can be sucked from the at least one conveyor channel through the gas-permeable conveyor belt, in particular the conveyor belt or the vacuum belt.
  • the mixture of mineral fibers and binding agent can also be sucked to the surface of the gas-permeable conveyor belt, in particular the conveyor belt or the vacuum belt, and distributed there evenly.
  • the gas can advantageously be air.
  • ambient air can be used to provide a corresponding gas flow, in particular air flow, to generate in the at least one conveying channel.
  • At least one binding agent introduction device can have at least one spray nozzle with which the binding agent can be sprayed into the conveying path of the dissolved mineral fibers, wherein at least one spray nozzle can be directed transversely to a conveying direction of the mineral fibers with respect to its spray direction and / or at least one The spray nozzle can be directed at least partially against the conveying direction of the mineral fibers with respect to its spray direction and / or at least one spray nozzle can be directed at least partially in the conveying direction of the mineral fibers with respect to its spray direction.
  • the binding agent can be sprayed evenly into the conveying channel.
  • the efficiency of the mixing and wetting of the mineral fibers can be influenced and improved.
  • At least one binding agent introduction device can be designed for introducing liquid and / or gaseous binding agent.
  • Liquid and / or gaseous binder can penetrate free areas between the dissolved mineral fibers better than powdered binder.
  • the liquid and / or gaseous binder can adhere directly to the surfaces of the individual mineral fibers and evenly wet them.
  • At least one mixing device in particular a mechanical mixing device, can be arranged behind at least one binding agent introduction device in the conveying direction of the mineral fibers.
  • the mixture of mineral fibers and binders can be further mixed so that the Mixture becomes more even. In this way, a homogeneous mixture of mineral fibers and binders can be achieved.
  • At least one mechanical mixing device can advantageously have at least two rotatingly drivable mixing rollers. With the help of the mixing rollers, the mixture of mineral fibers and binding agents can be continuously mixed further.
  • the axes of rotation of at least two rotatingly drivable mixing rollers can advantageously run in parallel.
  • the at least two mixing rollers can be arranged next to one another in such a way that they delimit a passage gap for the mixture of mineral fibers and binders.
  • the mixture of mineral fibers and binding agents can be conveyed through the passage gap with the aid of the rotation of the mixing rollers, the mixture of mineral fibers and binding agents being drummed and thus mixed more evenly.
  • At least one of the mixing rollers can be designed as a web roller.
  • web rollers On their radially outer circumferential side, web rollers have a plurality of projecting webs which each extend parallel or obliquely to the axis of rotation of the web roller. With the bars, the mixture of mineral fibers and binding agents can be milled in an improved manner.
  • At least one shredding device for shredding mineral fiber agglomerates has at least one fiber opener for triggering mineral fibers from mineral fiber agglomerates and at least one binding agent introduction device is functionally provided directly behind at least one ejection of at least one fiber opener , with which binding agent can be introduced into the conveying path of the dissolved mineral fibers, whereby the conveying path of the dissolved mineral fibers becomes one Conveyor belt leads, on which the mixture of mineral fibers and binding agent is to be arranged distributed.
  • the end of the at least one conveying path of the dissolved mineral fibers is located above a conveyor belt, in particular a forming belt or a vacuum belt.
  • a conveyor belt in particular a forming belt or a vacuum belt.
  • the mixture produced can advantageously be distributed directly on the molding belt.
  • a mineral fiber mat can thus be realized on the molding belt.
  • the mineral fiber mat can be conveyed to a press with the shaping belt and, if necessary, further conveyor belts.
  • the mineral fiber mat can be pressed into mineral fiber boards with the press.
  • the mixture can first be spread on a vacuum belt.
  • the vacuum belt can be part of a further mixing device. With the vacuum belt, the mixture can then be conveyed onto the molding belt and distributed there.
  • the conveyor belt can be gas-permeable and at least one suction means for gas can be arranged below the conveyor belt. With the aid of the at least one suction means, gas can be sucked through the conveyor belt from above the conveyor belt become. In this way, the mixture of mineral fibers and binding agents can be sucked onto the surface of the conveyor belt. In this way, a more even distribution of the mixture of mineral fibers and binding agents on the conveyor belt can be achieved.
  • the system can have at least one bale opener for breaking up mineral fiber bales and / or the system can have at least one cleaning device for separating physical impurities and mineral fibers and / or the system can have at least one metering device for metering the mineral fibers.
  • Mineral fiber balls can be crushed with the help of at least one bale opener. In this way, mineral fibers in the form of pressed mineral fiber balls can be processed with the system. The mineral fiber balls will be broken up into mineral fibers in the plant.
  • At least one bale opener can advantageously have at least one chopping roller.
  • Mineral fiber balls can be torn apart with a chopping roller.
  • At least one bale opener can have at least one chopping roller with needle pins. Tightly compressed mineral fiber balls can be milled off with needle pins and thus broken up into fiber clumps. The fiber clumps can later be broken up into individual mineral fibers, in particular with at least one fiber opener.
  • the system can have at least one cleaning device.
  • the at least one cleaning device physical contaminants, in particular stones, sand, bits or the like, can be separated from the mineral fibers.
  • at least one cleaning device can act on the basis of air separation. An efficient separation of the impurities can take place with air separation.
  • at least one cleaning device can have at least one vibration cutting table.
  • the at least one cleaning device can advantageously be arranged functionally behind at least one bale opener and / or in front of a mixing device for producing a mixture of mineral fibers.
  • a mixing device for producing a mixture of mineral fibers.
  • the system can have at least one metering device with which the amount of mineral fibers can be metered.
  • the at least one metering device can advantageously have a weighing device, in particular a belt scale, for detecting and regulating the discharge weight of the mineral fibers.
  • the at least one metering device can advantageously have a metering hopper.
  • the mineral fibers can be temporarily collected in the dosing bunker.
  • the metering hopper can advantageously be designed according to the required spread of the mixture of mineral fibers and binders on the forming belt. In this way, the spread can already be specified with the at least one metering device.
  • the at least one metering device can advantageously have at least one rotationally drivable discharge roller at its discharge. With the help of At least one discharge roller, the mineral fibers can be better discharged from the metering device, in particular the metering hopper.
  • the at least one discharge roller can advantageously have a plurality of projections, in particular pins, spikes or teeth or the like, on its peripheral side. In this way, clumps of mineral fibers can be further broken down.
  • the object is achieved according to the invention in the method in that mineral fibers are extracted from mineral fiber agglomerates with at least one fiber opener and the released mineral fibers are mixed with binding agent immediately after the release.
  • the mineral fibers can be mixed with binders, in particular crosslinked, before they can reunite to form fiber agglomerates. In this way, a more even mixing of the binding agent with the dissolved mineral fibers can be achieved.
  • FIG. 1 shows a system for producing mineral fiber mats from a mixture of mineral fibers and binding agents for the purpose of felling mineral fiber boards, with a mixing device for producing the mixture of mineral fibers and binding agents according to a first embodiment
  • FIG. 2 shows a mixing device according to a second exemplary embodiment, which can be used in the system from FIG. 1;
  • FIG. 3 shows a mixing device according to a third embodiment, which can be used in the system from FIG. 1, and
  • FIG. 4 shows a system for producing mineral fibers from a mixture of mineral fibers and binders according to a fourth embodiment, which has four mixing devices above a molding belt.
  • FIG. 1 a system 10 for the production of mineral fiber mats 12 from a mixture 14 of mineral fibers 16 and a binding agent 18 is shown in a functional illustration.
  • the mineral fiber mats 12 are fed to a press, not shown, with which the mineral fiber mat 12 is pressed into mineral fiber boards and, if necessary, cut as required.
  • a press not shown
  • rigid mineral fiber boards with an adjustable modulus of elasticity are produced.
  • Such mineral fiber boards can be used in particular as protective cladding on ceilings and walls of buildings.
  • sound and / or heat insulating / absorbing mineral fiber panels can be produced from the mineral fiber mats 12.
  • the mineral fibers 16 can be made from different types of rock, for example basalt, dolomite or feldspar, as well as slag from blast furnaces in steel production.
  • the mineral fibers 16 can comprise or consist of slag fibers, recycled fibers and / or new fibers.
  • the mineral fibers 16 can, for example, have a fiber diameter between approximately 3 ⁇ m and 15 ⁇ m.
  • the mineral fibers 16 can be staple fibers with lengths between approximately 1 mm and 25 mm, for example.
  • the mineral fibers 16 are provided, for example, in the form of pressed mineral fiber balls 20.
  • the mineral fiber balls 20 have, for example, a mass of about 500 kg.
  • the mineral fiber balls 20 can consist of recycled goods or a combination of recycled goods and new goods.
  • Liquid glue can be used as the binder 18, for example.
  • the liquid glue can have reactive resin systems based on phenol-formaldehyde or isocyanate, for example.
  • the proportion of binding agent 18 in the mixture 14 can be, for example, about 5% to 15% based on the dry mass of the mineral fibers 16.
  • the mineral fiber bales 20 are conveyed via a feed conveyor belt 22, on the right in FIG. 1, to a first ascending conveyor 24 of a bale opener 26.
  • the mineral fiber bales 20 are milled off, for example with a first needle roller 28, as a result of which the mineral fiber bales 20 are broken up into coarse fiber lumps.
  • the coarse fiber lumps fall onto a connecting conveyor belt 30 and are conveyed with this to a second needle roller 32.
  • the coarse fiber lumps are milled off with the second needle roller 32 and so further reduced.
  • the smaller fiber lumps fall onto an ascending conveyor 34.
  • a collecting container 36 is arranged, with which bits can be collected which, due to their spherical shape, roll backwards from the ascending conveyor 34.
  • the mineral fibers 16 which are for the most part piled up in smaller fiber clumps, are conveyed upwards to a sifting device 38.
  • a sifting device 38 With the sifting device 38, impurities such as sand, bits or the like are removed, for example by means of air sifting.
  • the sifting device 38 is part of a mixing device 88 with which the mixture 14 of mineral fibers 16 and binding agent 18 is realized.
  • the metering bunker 40 is designed according to a required spread width with which the mixture 14 to produce the mineral fiber mats 12 is transferred to a conveyor belt Form of a molding tape 50, as described below, is scattered.
  • the dosing hopper 40 is also part of the mixing device 88.
  • the dosing hopper 40 has a weighing device 42, for example in the form of a belt scale on a conveyor belt 44. With the weighing device 42, the discharge weight of the mineral fibers 16 is recorded and regulated.
  • the mineral fibers 16 are conveyed to a rotatingly driven discharge roller 46.
  • the axis of rotation of the discharge roller 46 runs perpendicular to a conveying direction 48 of the forming belt 50.
  • the discharge roller 46 has a plurality of sawtooth-shaped projections on its radially outer peripheral side, with which mineral fibers 16 are torn out of the fiber clumps.
  • the direction of rotation of the discharge roller 46 is predetermined such that its side facing the upper run of the conveyor belt 44 moves in the conveying direction of the conveyor belt 44.
  • a back scraping rake 52 in the form of a circulating belt.
  • the lower run of the backscatter rake 52 moves in the opposite direction to the upper run of the conveyor belt 44.
  • the backscatter rake 52 With the backscatter rake 52, the mineral fibers 16, which are largely still in fiber clumps, are brought on the conveyor belt 14 to a constant level. In this way, a constant delivery volume is achieved.
  • the discharge of the dosing hopper 40 is located below the discharge roller 46.
  • a feed shaft 54 of a fiber opener 56 is arranged below the discharge of the dosing hopper 40.
  • the fiber opener 56 is part of the mixing device 88 for generating the mixture 14 of mineral fibers 16 and binding agent 18.
  • the fiber opener 56 is also designed in accordance with the spread of the mixture 14 on the forming belt 50.
  • the fiber opener 56 has two rotatingly driven web rollers 58, at the top in FIG. 1, and a rotatingly driven chopping roller 60, below.
  • the axes of rotation of the web rollers 58 and the cut-off roller 60 run parallel to one another and perpendicular to the conveying direction 48 of the forming belt 50.
  • the web rollers 58 are located approximately at the same level. Each web roller 58 has a plurality of webs 62 on its circumferential side which is radially outer with respect to its axis of rotation. The webs 62 each run parallel to the axes of rotation of the web rollers 58 and extend radially outward. The web rollers 58 are arranged, for example, in such a way that their webs interlock with one another.
  • the two web rollers 58 delimit a passage gap 64 for the mineral fibers 16, which are mostly present as clumps of fibers.
  • the web rollers 58 are driven in the opposite direction of rotation.
  • the directions of rotation are predefined in such a way that the circumferential sides of the web rollers 58 facing each other move downwards towards the knock-off roller 60. In this way, the fiber lumps of mineral fibers 16 are clamped in the passage gap 64 between the web rollers 58 and conveyed downwards.
  • the knock-off roller 60 is implemented as a pin roller which has a multiplicity of needle pins 66 on its radially outer circumferential side.
  • the needle pins 66 are distributed on the circumferential side of the cut-off roller 60 and arranged offset from one another in such a way that, viewed over the entire circumference, no gaps remain in the circumferential direction of the removal roller 60.
  • the chopping roller 60 rotates at a higher rotational speed than the web rollers 58.
  • the cut-off roller 60 is located at the exit of the passage gap 64, spatially below the web rollers 58. As the cut-off roller 60 rotates, the needle pins 66 tear mineral fibers 16 from the fiber clumps, which in the passage gap 64 between the web rollers 58 are clamped. As a result, the fiber lumps are broken up further, so that finely dissolved mineral fibers 16 are discharged behind the chopping roller 60.
  • the direction of rotation of the chopping roller 60 is specified in such a way that the torn mineral fibers 16 are thrown into the upper region of a conveying channel 68.
  • the distance between the chopping roller 60 and the opposite wall of the conveying channel 68 is dimensioned such that the mineral fibers 16 thrown out do not collide with the wall.
  • the conveying channel 68 is also part of the mixing device 88.
  • the conveying channel 68 there is an air flow 70 which is generated by a fan 72 with a high air throughput.
  • the finely dissolved mineral fibers 16 are conveyed downward to the forming belt 50 through the conveying channel 68 with the aid of the air flow 70.
  • the conveying channel 68 and the air flow 70 behind the fiber opener 56 provide a conveying path for the mineral fibers 16, which is indicated in FIG. 1 by arrows which characterize the conveying direction 76.
  • the conveying channel 68 widens in the dimension parallel to the conveying direction 48 of the forming belt 50.
  • the conveying channel 60 has the effect of a Venturi tube there. The conveying speed of the mineral fibers 16 is reduced there.
  • the walls of the conveying channel 68 have a multiplicity of air passage holes 74 in the widened section. Ambient air enters the conveying channel 68 from outside through the air passage holes 74. A fine air flow is thus generated on the walls of the conveying channel 68, which prevents the mineral fibers 16 and binding agent 18 from sticking to the walls.
  • a plurality of binder introduction devices in the form of spray nozzles 78 are arranged, for example, directly behind the chopping roller 60.
  • the spray nozzles 78 are also part of the mixing device 88.
  • two spatially upper spray nozzles 78 are directed downwards, that is to say partially in the conveying direction 76 of the mineral fibers 16.
  • Two central spray nozzles 78 are directed transversely to the conveying direction 76.
  • Two lower spray nozzles 78 are directed obliquely against the conveying direction 76.
  • a relatively thin curtain of mineral fibers 16 is produced in the conveying channel 68 in accordance with the flow path of the air stream, which is sprayed with binding agents 18 on its front and rear side with respect to the conveying direction 48. Since the mineral fibers 16 are finely dissolved immediately behind the chopping roller 60 and are kept at a distance from one another with the aid of the specially predetermined flow path of the air stream 70 in the thin curtain, the mineral fibers 16 are evenly cross-linked with the binding agent. In this way, a uniform mixture 14 of mineral fibers 16 and binding agent 18 is produced. When the binder 18 is introduced, many particles of the binder 18 hit the mineral fibers 16 directly and adhere there. The remaining free particles of the binder 18 are conveyed downward to the forming belt 50 by the air flow 70. The air flow 70 prevents mineral fibers 16 and free particles of the binding agent 18 from hitting the walls of the conveying channel 68 and adhering there.
  • the mixing device 82 comprises, for example, four rotatingly driven mixing rollers with which the glued mineral fibers 16, the non-glued mineral fibers 18 and the free particles of binding agent 18 are mechanically mixed.
  • the axes of rotation of the mixing rollers are parallel.
  • the mixing rollers are arranged next to one another in such a way that a passage gap for the mixture 14 is formed between adjacent mixing rollers.
  • the mixture 14 is conveyed through the passage gap with the rotating mixing rollers, the mixture 14 being drummed.
  • the free particles of binder 18 are distributed evenly between the mineral fibers 16.
  • the upper run of the forming belt 50 is located below the mixing device 82.
  • the forming belt 50 is air-permeable.
  • the molding tape 50 made of an air-permeable plastic fabric tape is exemplary.
  • a suction chamber 84 is arranged below the upper run of the forming belt 50 and is open to the upper run of the forming belt 50.
  • An air distribution system leads from the suction chamber 84 to the fan 72 mentioned above. With the fan 72, air is sucked through the upper run of the forming belt 50 and through the suction chamber 84.
  • the fan 72 and the suction chamber 84 are also part of the mixing device 88.
  • the negative pressure that prevails in the suction chamber 84 Due to the negative pressure that prevails in the suction chamber 84, the mixture 14, or the glued mineral fibers 16, is sucked onto the upper side of the upper run of the forming belt 50.
  • the negative pressure causes a self-regulating distribution of the glued mineral fibers 16 on the upper side of the upper run of the forming belt 50 and binding agent 18 are located, a higher one Realized flow velocity, so that the mixture 14 coming from the conveying channel 68 is preferably directed there.
  • a homogeneous mineral fiber mat 12 is thus continuously formed on the forming belt 50.
  • a so-called scalper 86 is arranged in the conveying direction 48 of the forming belt 50 behind the conveying channel 68. With the scalper 86, the top of the mineral fiber mat 12 is evenly milled off. The mineral fiber mat 12 thus has a uniform fleas, a uniform surface and a reduction in the fluctuation in weight per unit area.
  • the mineral fiber mat 12 is fed behind the scalper 86 with appropriate conveyor tracks to a press arrangement (not shown), for example with a pre-press and a fleece press. With the pressing arrangement, the mineral fiber mat 12 is pressed into solid mineral fiber boards. If necessary, the mineral fiber boards are cut to length with appropriate cutting tools, for example diagonal saws or the like.
  • a fiber opener 156 according to a second exemplary embodiment is shown in FIG. Those elements which are similar to those of the first exemplary embodiment from FIG. 1 are provided with the same reference symbols.
  • the second exemplary embodiment differs from the first exemplary embodiment in that the conveying channel 168 has a curved profile at its end facing the chopping roller 60.
  • the curvature is adapted to the trajectory of the finely dissolved mineral fibers 16, which are thrown with the help of the chopping roller 60 in the tangential direction, to the right in FIG. 2. In this way, the risk of mineral fibers 16 being thrown against the wall of the conveying channel 168 opposite the chopping roller 60 is reduced.
  • two external air inlet nozzles 190 are provided in the walls of the conveying channel 168 by way of example.
  • the external air inlet nozzles 190 are located on the inside of the curve and the outside of the curve of the curved section of the conveying channel 168.
  • the external air inlet nozzles 190 are adjustable.
  • the external air inlet nozzles 190 serve to form the stream of mineral fibers 16.
  • FIG. 3 shows a fiber opener 256 in accordance with a third exemplary embodiment.
  • the second exemplary embodiment differs from the first exemplary embodiment in that the conveying channel 268 is constantly widened in its lower region. In this way, the lower area of the conveying channel 268 is designed so wide that mineral fibers 16 and sprayed-in binding agent 18 can be conveyed at a sufficient distance from the walls of the conveying channel 268.
  • FIG. 4 shows part of the system 10 according to a fourth exemplary embodiment. Those elements which are similar to those of the first exemplary embodiment from FIG. 1 are provided with the same reference symbols.
  • the exemplary embodiment differs from the first exemplary embodiment in that, for example, four mixing devices 88 are arranged above a forming belt 450.
  • the mixing device 88 are arranged in the conveying direction 48 of the forming belt 450 one behind the other.
  • the mixing devices 88 are constructed identically, for example.
  • a conveyor belt in the form of a vacuum belt 350 is provided instead of the forming belt 50.
  • the vacuum belt 350 like the forming belt 50, is air-permeable.
  • a suction chamber 84 and a fan connected to it are provided below the upper run of the vacuum belt 350, analogous to the forming belt 50.
  • the Mixture 14 is distributed on the vacuum belt 53 analogously to the first exemplary embodiment.
  • a chopping roller 392 is arranged above the exit of each vacuum belt 350. As a result of the additional milling with a chopping roller 392, the mixture 14 is mixed again and the homogeneity is thus significantly improved.
  • the discharge for the mixture 14 onto the forming belt 450 is located behind the exit of the vacuum belt 350.
  • the molding tape 450 is air-permeable. Below the upper run of the forming belt 450, for example, four suction chambers 184 and fans 172 connected to them are arranged. The suction chamber at 184 is located below the respective discharge of the mixing device 88. In this way, the mixture 14 discharged by the respective mixing device 88 is evenly distributed on the forming belt 450 by the corresponding negative pressure analogous to the first embodiment, thus forming a mineral fiber mat 12.
  • a scalper 86 is arranged behind the last mixing device 88 in the conveying direction 48. With the scalper 86, analogously to the first embodiment, the top of the mineral fiber mat 12 is evenly milled off.
  • the mineral fiber mat 12 is fed behind the scalper 86 with appropriate conveyor tracks to a press arrangement (not shown), for example with a pre-press and a hot press. With the pressing arrangement, the mineral fiber mat 12 is pressed into solid mineral fiber boards. If necessary, the mineral fiber panels are cut to length with appropriate cutting tools, for example diagonal saws or the like.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Nonwoven Fabrics (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

L'invention concerne un dispositif mélangeur (88) et un procédé permettant de former un mélange (14) composé de fibres minérales (16) et de liants (18), ainsi qu'une installation (10) destinée à produire des mats de fibres minérales à partir d'un mélange (14) de fibres minérales (16) et de liants (18) sur une bande de formage (50), au cours de la fabrication de panneaux de fibres minérales. Le dispositif mélangeur (8) comprend au moins un dispositif de broyage (56) destiné à broyer des agglomérés de fibres minérales. Au moins un dispositif de broyage (56) destiné à broyer des agglomérés de fibres minérales comporte au moins une ouvreuse de fibres (56) destinée à détacher des fibres minérales (16) des agglomérés de fibres minérales. Au moins un dispositif d'introduction de liants (78), au moyen duquel des liants (18) peuvent être introduits dans le parcours de transport (76) des fibres minérales (16) détachées, se situe de manière fonctionnelle immédiatement derrière au moins un système d'éjection d'au moins une ouvreuse de fibres (56).
PCT/EP2021/052229 2020-01-31 2021-01-31 Dispositif mélangeur destiné à former un mélange de fibres minérales et de liants, installation de production d'un mat de fibres minérales et procédé de production d'un mélange de fibres minérales et de liants Ceased WO2021152163A1 (fr)

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DE102020102541.6A DE102020102541A1 (de) 2020-01-31 2020-01-31 Mischvorrichtung zur Erzeugung einer Mischung aus Mineralfasern und Bindemitteln, Anlage zur Erzeugung einer Mineralfasermatte und Verfahren zur Erzeugung einer Mischung aus Mineralfasern und Bindemitteln
DE102020102541.6 2020-01-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117779342A (zh) * 2023-12-28 2024-03-29 交城义望铁合金有限责任公司 一种利用液态热熔渣直接制备的矿物纤维装饰板

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US3004878A (en) * 1957-08-16 1961-10-17 Owens Corning Fiberglass Corp Method of producing fibrous glass building boards and product
US3050427A (en) * 1957-04-29 1962-08-21 Owens Corning Fiberglass Corp Fibrous glass product and method of manufacture
DE1904858A1 (de) * 1968-02-01 1970-10-01 Conwed Corp Verfahren und Vorrichtung zum Herstellen von Matten od.dgl.aus ineinandergreifenden Teilchen
US4693913A (en) * 1985-05-06 1987-09-15 Veb Zementkombinat Method and apparatus for the loss-free introduction of binding agents into mineral wool fleeces
EP0489639A1 (fr) * 1990-12-06 1992-06-10 Isover Saint-Gobain Matelas fibreux destiné au pressage
US20110247838A1 (en) * 2010-04-13 2011-10-13 3M Innovative Properties Company Thick inorganic fiber webs and methods of making and using
US20140001676A1 (en) 2011-01-31 2014-01-02 Rockwool International A/S Method for manufacturing a mineral fibre-containing element and element producted by that method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050427A (en) * 1957-04-29 1962-08-21 Owens Corning Fiberglass Corp Fibrous glass product and method of manufacture
US3004878A (en) * 1957-08-16 1961-10-17 Owens Corning Fiberglass Corp Method of producing fibrous glass building boards and product
DE1904858A1 (de) * 1968-02-01 1970-10-01 Conwed Corp Verfahren und Vorrichtung zum Herstellen von Matten od.dgl.aus ineinandergreifenden Teilchen
US4693913A (en) * 1985-05-06 1987-09-15 Veb Zementkombinat Method and apparatus for the loss-free introduction of binding agents into mineral wool fleeces
EP0489639A1 (fr) * 1990-12-06 1992-06-10 Isover Saint-Gobain Matelas fibreux destiné au pressage
US20110247838A1 (en) * 2010-04-13 2011-10-13 3M Innovative Properties Company Thick inorganic fiber webs and methods of making and using
US20140001676A1 (en) 2011-01-31 2014-01-02 Rockwool International A/S Method for manufacturing a mineral fibre-containing element and element producted by that method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117779342A (zh) * 2023-12-28 2024-03-29 交城义望铁合金有限责任公司 一种利用液态热熔渣直接制备的矿物纤维装饰板

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