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WO2008155650A2 - Procédé et moyens pour mouler par injection ou par extrusion - Google Patents

Procédé et moyens pour mouler par injection ou par extrusion Download PDF

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Publication number
WO2008155650A2
WO2008155650A2 PCT/IB2008/001634 IB2008001634W WO2008155650A2 WO 2008155650 A2 WO2008155650 A2 WO 2008155650A2 IB 2008001634 W IB2008001634 W IB 2008001634W WO 2008155650 A2 WO2008155650 A2 WO 2008155650A2
Authority
WO
WIPO (PCT)
Prior art keywords
insulating material
gap
free space
thermally insulating
higher temperature
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/IB2008/001634
Other languages
English (en)
Other versions
WO2008155650A3 (fr
Inventor
Vincenzo Commisso
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.)
SINERGETIC Srl
Original Assignee
SINERGETIC Srl
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 SINERGETIC Srl filed Critical SINERGETIC Srl
Publication of WO2008155650A2 publication Critical patent/WO2008155650A2/fr
Publication of WO2008155650A3 publication Critical patent/WO2008155650A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/74—Heating or cooling of the injection unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/2038—Heating, cooling or lubricating the injection unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2218—Cooling or heating equipment for dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/26—Mechanisms or devices for locking or opening dies
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2737—Heating or cooling means therefor
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/62—Barrels or 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or 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
    • B29C48/78—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
    • B29C48/83—Heating or cooling the 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
    • B29C48/78—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
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2725—Manifolds
    • 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

Definitions

  • the present invention concerns a method for extrusion of plastic materials, for moulding of plastic materials, thermosetting materials, elastomers, metals and alloys thereof by injection, extrusion or die-casting.
  • the invention moreover concerns the means for implementation of the aforesaid method.
  • plastic material is heated, injected and pressed, or else, for example, extruded, or else heated and adapted to a particular shape with the heat-forming technique. Then, it is cooled and hence becomes that end product with which we are acquainted in our everyday life for our various needs: for example, bumpers for motor vehicles, simple caps, plastic bags, or packages that preserve foodstuffs in vacuum conditions, or simply blisters, which are hermetic containers for products.
  • injection moulding of plastic materials the objects assume their shape because an injection press forcedly introduces into a mould material in the molten state, which fills a cavity. In this cavity, the material cools in a period of time depending upon the characteristics of the shape of the piece that is to be produced, upon the technical, chemical, and physical characteristics of the material injected and pressed in the cavity and upon the characteristics of conditioning outside the cavity.
  • thermosetting materials materials defined as "thermosetting materials” ' .
  • These materials present characteristics that differ from what has been illustrated with reference to processing of plastic materials. In fact, these materials are injected and pressed in the cold state in a heated cavity. Following manufacturing processes indicated by the producer, they become an object that can be used, for example, the important parts of light assemblies of means of transport.
  • metal materials such as aluminium and its alloys or, once again as example, magnesium
  • metal materials such as aluminium and its alloys or, once again as example, magnesium
  • the electrical resistors contribute in a determining way to heating of the systems listed. They present different shapes, i. e. , they may be tubular, cylindrical, spiral-shaped, armoured mounted on ceramic supports, or else in the form of band or simple resistive sheets appropriately insulated, which are enclosed in a container and then housed in the system, and form part of the system. All these production tools produce heat and distribute heat.
  • the operating temperatures of the machines briefly listed above range from minimum values, such as 150 0 C for thermosetting materials or elastomers, to 650 0 C for magnesium.
  • the heat produced by the required heating devices does not, however, distribute in a unidirectional way, but follows the natural laws of thermodynamic physics.
  • the efforts made in an endeavour to orient the heat flow are frequently insufficient to achieve the purpose. Consequently, it happens that the heat produced distributes in the environment to be heated following the laws of thermal conductivity of materials, and as regards the surrounding environment - which is considered insulating - the heat follows equally natural laws.
  • insulating barriers are arranged, which are in any case insufficient to contain the heat produced in the body, in the cavity, and on the heated surface. This dispersed heat has an economic cost. It must be eliminated for production requirements - the faster the cooling, the higher the productivity that can be achieved - through cooling devices.
  • An object of the invention is to provide a method for moulding by injection or extrusion that will enable all this energy waste and the consequent adverse effects on the environment to be reduced, contained, and if possible eliminated.
  • Another object of the invention is to provide means for implementation of the aforesaid method that will be effective, safe, and structurally simple.
  • the method for moulding by injection or extrusion according to the invention is implemented in a free space or gap between two bodies or media ( of which one, for example, can even be air) at different temperatures.
  • a barrier made of thermally insulating material which comprises at least one insulating material, which has an index of thermal conductivity lower than that of dry air at 0 0 C and is designed to reduce the thermal dispersion linked both to the convective motions and/or heat conduction of air and to irradiation, which depends upon the characteristics of the body at a higher temperature.
  • Said barrier made of thermally insulating material is obtained, for example, by means of panels, plates or the like, which contain said at least one insulating material and are arranged in said free space or gap, with or without contact with said body or medium at a higher temperature.
  • said barrier made of thermally insulating material is obtained by totally or partially filling said free space or gap using a medium in granules, powder or the like, containing said at least one insulating material.
  • Said insulating material is, for example, chosen in the family of aerogels, derivatives thereof, and/or composites thereof, and/or substances combined therewith.
  • the means for implementation of the method according to the invention are arranged in a free space or gap between two bodies or media at different temperatures.
  • Said means for implementation of the method according to the invention comprise a barrier made of thermally insulating material, which is set in said free space or gap and includes at least one insulating material, which has an index of thermal conductivity lower than that of dry air at 0° C and is designed to reduce the thermal dispersion linked both to the convective motions and/or heat conduction of air and to irradiation, which depends upon the characteristics of the body at a higher temperature.
  • Said barrier made of thermally insulating material comprises, for example, panels, plates or the like, which contain said at least one insulating material and are arranged in said free space or gap, with or without contact with said body or medium at a higher temperature.
  • Said barrier made of thermally insulating material may also consist in a total or partial filling of said free space or gap by means of granules, powder, or the like containing said at least one insulating material.
  • said insulating material belongs, for example, to the family of aerogels, derivatives thereof, and/or composites thereof, and/or substances combined therewith.
  • FIG. 2 is a view similar to that of Figure 1, but in which the plasticizing cylinder of said press is coated witha highly insulating material, according to the invention;
  • FIG. 3 is a schematic cross-sectional view from the injection side of a known mould for plastic materials.
  • FIG. 4 is a view similar to that of Figure 3, but illustrating insulating panels mounted, according to the invention, in a gap of the mould itself.
  • Figure 1 is a schematic representation of a conventional injection press; it is very similar to an extruder for plastic materials.
  • the reference A designates the plasticizing cylinder, the reference B one of the heating elements used to bring the cylinder A to the operating temperature.
  • the reference C designates, by way of example, a covering shell made of highly insulating material, set on the cylinder A, according to the invention. It can be made in sectors or as single coating or enveloping element. Said shell C forms a barrier made of thermally insulating material set between the cylinder A and the environmental air ( medium outside of the cylinder) , which is at a temperature lower than that of said cylinder.
  • Figure 3 of drawings is a schematic illustration of a known mould for plastic materials, viewed in cross section and from the so-called "injection side". Set within said mould is a system for direct injection of plastic, comprising a distribution plate designated by Al and two injectors designated by Bl, which are the hottest parts of the mould.
  • Figure 4 illustrates the mould according to Figure 3, but in which, according to the invention, insulating modules or panels Cl, viewed in cross section, are provided. Said insulating panels are assembled on the hottest parts of the aforesaid mould, in the air gap between the distribution plate Al and the injectors Bl, on one side, and the outer casing of the mould, on the other. According to the embodiment of the invention illustrated herein by way of example, the panels Cl are cut to the right size and adequately fixed to the parts to be thermally insulated.
  • the solution according to the invention envisages, by way of example, the use of elements made of the insulating materials made available by nano-technologies and widely tested by the space industry in the last few years.
  • Said elements made of insulating materials are, for example: a) flexible insulating modules which can be easily adapted to pre-existing or newly devised machines and devices; b) parts of machines or apparatuses where these elements made of insulating material are arranged inside and/or outside to contain the thermal interchange between areas at a higher temperature and areas at a lower temperature; and c) heating elements insulated with said elements made of insulating material, which facilitate containment of heat dispersion as fundamental specification and as regards

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (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 procédé pour mouler par injection ou par extrusion, un espace libre ou un vide étant ménagé entre deux corps ou deux supports à des températures différentes. Selon l'invention, une barrière constituée d'un matériau thermo-isolant (C) est installée dans l'espace libre ou le vide, ladite barrière comprenant au moins un matériau isolant qui possède un indice de conductivité thermique inférieur à celui de l'air sec à 0 C et est conçue pour limiter la dispersion thermique liée aux mouvements de convection et/ou à la conduction de chaleur de l'air et à une irradiation qui dépend des caractéristiques du corps à une température plus élevée.
PCT/IB2008/001634 2007-06-21 2008-06-20 Procédé et moyens pour mouler par injection ou par extrusion Ceased WO2008155650A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2007A000448 2007-06-21
IT000448A ITTO20070448A1 (it) 2007-06-21 2007-06-21 Procedimento e mezzi per l'estrusione, lo stampaggio di materie plastiche, elastomeri, termoindurenti, metalli e loro leghe mediante iniezione e pressofusione

Publications (2)

Publication Number Publication Date
WO2008155650A2 true WO2008155650A2 (fr) 2008-12-24
WO2008155650A3 WO2008155650A3 (fr) 2009-02-12

Family

ID=40051007

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/001634 Ceased WO2008155650A2 (fr) 2007-06-21 2008-06-20 Procédé et moyens pour mouler par injection ou par extrusion

Country Status (2)

Country Link
IT (1) ITTO20070448A1 (fr)
WO (1) WO2008155650A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2444228A1 (fr) * 2010-10-22 2012-04-25 Coperion GmbH Couvercle d'isolation thermique pour un segment d'une extrudeuse
EP2429793A4 (fr) * 2009-05-13 2012-11-28 Husky Injection Molding Système de canaux chauffants comportant un isolant thermique de soutien non structural comprenant un matériau visible
CN108136704A (zh) * 2015-08-28 2018-06-08 耐克创新有限合伙公司 用于由热固性弹性体组合物模制制品的方法和所模制的制品

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JPS6056085B2 (ja) * 1980-08-05 1985-12-09 勇輔 南部 合成樹脂成形機の加熱装置
JPS60132724A (ja) * 1983-12-22 1985-07-15 Fanuc Ltd 射出成形機における真空断熱式加熱シリンダ
GB9107468D0 (en) * 1991-04-09 1991-05-22 Raychem Ltd Heating devices
DE19528648A1 (de) * 1995-08-04 1997-02-06 Basf Ag Kühl- oder Gefrierschrank
JP3195575B2 (ja) * 1997-10-13 2001-08-06 株式会社日本製鋼所 保温カバー付きヒータを有する加熱シリンダにおける温度制御装置
US6578596B1 (en) * 2000-04-18 2003-06-17 Stratasys, Inc. Apparatus and method for thermoplastic extrusion
EP1236525A3 (fr) * 2001-02-15 2003-07-02 Alcan Technology & Management AG Moule de coulée
JP2004291545A (ja) * 2003-03-28 2004-10-21 Gloria Dash:Kk プラスチック成形機における加熱筒保温装置
JP2004314399A (ja) * 2003-04-15 2004-11-11 Toshiba Mach Co Ltd 成形機の温度調整装置
US20050074514A1 (en) * 2003-10-02 2005-04-07 Anderson Oliver B. Zero cycle molding systems, methods and apparatuses for manufacturing dosage forms
JP2006123374A (ja) * 2004-10-29 2006-05-18 Makoto Nishizawa 射出成形機などの断熱カバー
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2429793A4 (fr) * 2009-05-13 2012-11-28 Husky Injection Molding Système de canaux chauffants comportant un isolant thermique de soutien non structural comprenant un matériau visible
US8535048B2 (en) 2009-05-13 2013-09-17 Husky Injection Molding Systems Ltd. Hot-runner system having non-structurally supportive heat insulator including visible material
EP2444228A1 (fr) * 2010-10-22 2012-04-25 Coperion GmbH Couvercle d'isolation thermique pour un segment d'une extrudeuse
CN108136704A (zh) * 2015-08-28 2018-06-08 耐克创新有限合伙公司 用于由热固性弹性体组合物模制制品的方法和所模制的制品

Also Published As

Publication number Publication date
WO2008155650A3 (fr) 2009-02-12
ITTO20070448A1 (it) 2008-12-22

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