WO1990008642A1 - Procede et appareil de fabrication d'articles a partir de materiaux thermoplastiques expansibles - Google Patents

Procede et appareil de fabrication d'articles a partir de materiaux thermoplastiques expansibles Download PDF

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Publication number
WO1990008642A1
WO1990008642A1 PCT/AU1990/000031 AU9000031W WO9008642A1 WO 1990008642 A1 WO1990008642 A1 WO 1990008642A1 AU 9000031 W AU9000031 W AU 9000031W WO 9008642 A1 WO9008642 A1 WO 9008642A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
cavity
pellets
micro
article
Prior art date
Application number
PCT/AU1990/000031
Other languages
English (en)
Inventor
William Louis Pittelkow
Anthony Ivan Cox
Original Assignee
Adfoam Pty. Limited
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 Adfoam Pty. Limited filed Critical Adfoam Pty. Limited
Publication of WO1990008642A1 publication Critical patent/WO1990008642A1/fr

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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3461—Making or treating expandable particles
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
    • B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0855—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using microwave
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B29C44/3426—Heating by introducing steam in the mould
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous

Definitions

  • This invention is concerned with the formation of articles from expandable thermo-plastic material, for
  • pellets of polymerised styrene or styrene and acrylonitrate when heated will expand due to the inclusions therein of volatile hydrocarbons.
  • Heat induced expansion of a quantity of such pellets within a mould cavity which is smaller than the free expansion volume of the pellets will result in the pellets bonding to each other due to the partial melt of the bead surfaces as a result of the heat applied and the pressure developed in the cavity as the bead mass tries to expand beyond the cavity volume.
  • the result is a coherent cellular mass having the external shape of the mould cavity. It is possible to form intricately shaped articles by this method.
  • the presently accepted process for the formation of articles by the above process involves exposing the pellets within a mould cavity to steam to provide the heat required for expansion/bonding.
  • the steam is injected into the mould cavity through perforations in the mould walls. After the expansion/bonding step the mould is cooled with water.
  • the mould is therefore subjected to rapid and dramatic fluctuations in temperature, 130 degrees Celsius during a heating step being commonplace followed by shock cooling. It is presently the practice to make the mould from metal and the working life of such moulds is short due to the severe working conditions.
  • the design of moulds is complex to provide for heating and cooling mediums and the introduction of the plastic pellets and the removal of the finished product.
  • the provision of the foregoing in metal moulds contributes substantially to the cost of the mould. With the above moulding method there is also a need for ancillary equipment such as steam
  • the prime object of the invention is to provide a method and apparatus for mould manufacturing articles from heat expandible polymerised plastic material which method and apparatus are simpler and more efficient than presently known methods and apparatus. It is envisaged that with the method and apparatus provided by this invention the mould will be made of a plastics material and accordingly the cost of a mould for an article can be dramatically reduced compared to the cost of making the mould for the same article from metal. The result will be a substantial reduction in the production cost per article.
  • the invention also provides a simple and effective way of producing an article comprised of a multitude of pellets fused together with a smooth substantially continuous exterior and with a substantially uniform internal texture.
  • the invention can be said to comprise a method of mould manufacturing an article from a plastics material, said method comprising the steps of:
  • the invention further provides apparatus for carrying out the above method, said apparatus comprising a mould handling station and a radiation chamber, said mould handling station including means to separate mould parts to permit the removal of an article form a cavity in the mould, means to charge pellets of plastic material into the cavity of a closed mould and transfer means whereby said mould can be transferred to the radiation chamber, said chamber having associated magnatrons to irradiate said chamber with
  • micro-waves and having a chamber closure to substantially prevent micro-wave radiation leakage from the chamber, and mould clamping means activated during a moulding operation to retain said mould parts clamped together to resist the pressure generated within the mould cavity during an article forming sequence.
  • Fig.1 is a is a schematic sectional elevation of the apparatus
  • Fig.2 is a fragmentary schematic elevation of an alternate arrangement for providing movement of the mould within the radiation chamber of the apparatus.
  • the apparatus comprises a mould handling station 1 having a bottom platen 2 with four support shafts 3 upstanding therefrom and a top platen 4 slidably mounted on the shafts 3.
  • the top platen 4 is raised and lowered relative to the bottom platen 2 by a pair of side mounted piston in cylinder combinations 5.
  • top and bottom mould parts 6 and 7 are identical to The top and bottom mould parts 6 and 7 are identical to The top and bottom mould parts 6 and 7 are identical to The top and bottom mould parts 6 and 7 are identical to The top and bottom mould parts 6 and 7 are identical to The top and bottom mould parts 6 and 7 are identical to The top and bottom mould parts 6 and 7 are identical to The top and bottom mould parts 6 and 7 are identical to The top and bottom mould parts 6 and 7 are identical to The top and bottom mould parts 6 and 7 are identical
  • conveyor means 10 of known suitable type, in this example rotatable balls mounted in housings fixed to the bottom platen 2.
  • piston rods aligned with holes in the backing plate 8 and in the mould part 6.
  • the piston rods (or extensions thereof) act as ejection pins to strip an article from the mould part 6 after mould part separation.
  • suction means can be coupled to at least some of these ports to create a negative pressure within the moulding cavity to draw off excess preconditioning additive and to assist in filling remote sections of the mould cavity.
  • the oven 16 comprises a housing 17 with a vertically openable door 18 (although a horizontally opening door can be used if
  • micro-wave energy The micro-waves are generated by
  • suitable arranged magnatrons 20 mounted on the housing 17.
  • the devices 20 are of a power designed to suit the
  • the chamber 19 has a cubic capacity of approximately 2 cubic meters and the micro-wave generators have a power of of 5 kW each.
  • a conveyor means 21 comprised of rows of freely rotating wheels with their upper edges in a plane
  • Upper and lower piston in cylinder units identified 21 and 22 are provided with platens 23 to exert mould clamping pressure on the mould backing plates 8 and 9 when the mould is in the chamber 19.
  • the upper platen 23 is provided with plug-like pins 24 to engage in and seal off the holes in the mould upper part 6 through which the bead filling device and stripper pins associated with the mould handling station pass.
  • the lower platen is just below the tops of the wheels of the conveyor means 21.
  • the piston rod 25 of the units 22 passes through a bush 26 in a bridge or other like bush support 27 and the piston rod 25 has a pair of diametrically disposed small angle helical tracks 28 which extend along part of the length of the piston rod 25.
  • the cylinders 21,22 are pressurised in a manner such that the lower platen moves slightly to engage the underface of the backing plate 9 and the upper platen is lowered to engage the pins 24 in the appropriate holes in the backing plate 8 and the mould part 6.
  • the pressure applied is such as to hold the mould parts firmly engaged so as to resist the internal pressure generated during the article forming operation.
  • the chamber door 18 is then closed and the power to the magnatrons is turned on for a period determined
  • the pressurised supply of fluid to the units 21,22 is regulated in a balanced fashion through valving and pressure regulation means so that an increase in pressure in the fluid to the unit 22 will be accompanied by a reduction in pressure to the unit 21 whilst maintaining a clamping pressure on the mould sufficient to keep the mould parts 6 and 7 firmly together in a sealed manner.
  • the mould assembly 6,7,8 & 9 will move upward in the chamber and at the same time because of the helical tracks 28 and the followers 29 the mould assembly will be rotated through a part of a revolution, preferably in the order of 190 degrees.
  • a reversal of the pressure distribution to the units 21,22 will result in a lowering of the mould assembly and a contra part rotation of the mould assembly.
  • the vertical movement is about equal to the height of the mould cavity.
  • magnatrons intersect.
  • hot spots areas of above average intensity
  • cold spots areas of below average intensity
  • the proposed linear and part rotational movement of the mould assembly averages out the intensity of the micro wave energy to which the mould assembly is subjected.
  • the units 21 and 22 are tandem units with the piston rods connected by cross-heads 30 and the cross-heads are coupled to the platens 23 through shafts 31 mounted in bearings 32 in the cross-heads 30.
  • the cross-head mounted shafts 31 will then rotate as the
  • the moulding process involves the flash generation of steam within the mould cavity by microwave heating of the water coating of the plastic pellets.
  • the steam will be
  • the result of the present invention is a substantially uniform texture throughout the finished product.
  • pre-conditioned part-expanded form are coated with water. It is possible to modify the process to achieve desired results by pre-treatment of the pellets. By way of example only there can be a use additives such as a "wetting" agent to ensure the pellets are uniformly coated with water.
  • finely divided metal or other powder can be used for the coating of the surface of the moulding chamber, with varying degrees of effectiveness, preferably the powder is selected from the group comprising aluminium, iron, carbon or zinc.
  • the metal powder acts as a barrier to heat loss from the mould and provides a hot "skin" for the moulding chamber which fuses the surface of the expanded material into a smooth
  • An alternate form of polystyrene pellet which is at least micro-wave opaque, can be achieved by having a powder or other form of material with required micro-wave opacity dispersed throughout each bead.
  • the micro-wave opaque material is preferably, but not limited to, carbon black.
  • a metal powder could be used as an alternative to carbon black or mixtures of powders and materials can be used to achieve the required qualities for the pellets.
  • the manner of manufacture of pellets having the above inclusions is not a feature of this invention.
  • the pellets may or may not be surface coated as hereinbefore described.
  • the apparatus as hereinbefore described can include mould cavity temperature monitoring means.
  • the temperature of the mould cavity is allowed to build up to a required limit at which it is maintained by cooling means. It would also be within the scope of this modification to provide the plastics material from which the mould is manufactured with fillers which would permit the mould to develop predetermined heat levels during the radiation stage. Temperature boosting means can be provided, if required, to bring the mould up to a required temperature.
  • non-transparent metals plastics, rubbers etc. may be used to facilitate these operations.
  • plastics plastics, rubbers etc.
  • the described arrangement may be modified if required to provide for the oven to be moved relative to the mould by suitable mechanisms which provide for the minimisation of effect of radiation field hot and cold spots, as described above.
  • a feature of the proposed method is the possibility of providing the mould with a lining of pervious material (such as woven fabric) or non-pervious material (such as PVC sheet) so that when the article is moulded the mould lining material will provide an outer surface covering for the article.
  • pervious material such as woven fabric
  • non-pervious material such as PVC sheet
  • the moulding material herein described has been polystyrene but it is to be understood that other materials may be used, for example, polyethylene and co-polymers of polystyrene and polyethylene.

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  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Le procédé décrit, qui sert à fabriquer un article, consiste à prévoir un moule ouvrable transparent aux micro-ondes et pourvu d'une cavité ayant la forme de l'article à former; à charger la cavité du moule d'une quantité prédéterminée de boulettes de matériau plastique, qui sont transparentes aux micro-ondes, qui subissent une expansion lorsqu'elles sont chauffées de façon à remplir la cavité du moule et qui s'agglomèrent les unes aux autres; à revêtir la surface des boulettes avec une substance produisant un gaz une fois chauffée, à exposer le moule à un rayonnement de micro-ondes suiffisant pour gazéifier le revêtement des boulettes, créant ainsi une chaleur et une pression dans la cavité du moule qui entraînent l'expansion des boulettes et permettent le remplissage de la cavité et l'agglomération des boulettes les unes aux autres, puis à refroidir l'article et à le retirer par démoulage de la cavité du moule.
PCT/AU1990/000031 1989-02-01 1990-01-31 Procede et appareil de fabrication d'articles a partir de materiaux thermoplastiques expansibles WO1990008642A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPJ248989 1989-02-01
AUPJ2489 1989-02-01

Publications (1)

Publication Number Publication Date
WO1990008642A1 true WO1990008642A1 (fr) 1990-08-09

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998007555A1 (fr) * 1996-08-20 1998-02-26 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede pour la fabrication de corps composites en plastique
WO1998050215A1 (fr) * 1997-05-08 1998-11-12 Trw Automotive Safety Systems Gmbh Procede de fabrication d'un volant leger
DE19829562A1 (de) * 1998-07-02 2000-01-05 Fraunhofer Ges Forschung Verfahren und Vorrichtung zum thermischen Verbinden von geschäumten Polymerpartikeln
DE19860611C1 (de) * 1998-12-29 2000-03-23 Fraunhofer Ges Forschung Verfahren zur Herstellung von Formkörpern aus Polymer-Schaumpartikeln
DE20019502U1 (de) * 2000-11-16 2002-01-03 Striebel, Christhard, 70199 Stuttgart Kunststoffbauteile mit einer Rhombendodekaederinnenstruktur
DE10009665C1 (de) * 2000-02-29 2002-01-24 Fraunhofer Ges Forschung Verfahren und Vorrichtung zum thermischen Verbinden von Polymerschaumpartikeln
WO2002014043A1 (fr) * 2000-08-14 2002-02-21 Blue Marble Polymers Limited Procédé de production de produits moussants biodégradables
WO2003037598A3 (fr) * 2001-10-29 2004-03-04 Blue Marble Polymers Ltd Ameliorations apportees et associees a des produits expanses biodegradables
WO2005051628A1 (fr) * 2003-11-27 2005-06-09 Novamont Spa Procede et appareil pour produire de la mousse biodegradable
WO2007067095A1 (fr) * 2005-12-06 2007-06-14 Andrey Nikolaevich Plaksunov Procede et dispositif de formation d'articles a partir de polymeres moussants utilisant le rayonnement millimetrique
GB2463860A (en) * 2008-08-28 2010-03-31 British Plastics Federation Moulding System and Method
DE102004049060B4 (de) * 2003-10-16 2010-04-01 Neue Materialien Bayreuth Gmbh Verfahren zur Herstellung von Formkörpern aus Polymerschaumpartikeln
WO2010076170A3 (fr) * 2008-12-30 2010-08-19 Basf Se Prise, assistée par micro-ondes, de corps de mousse/céramique mis en forme
CN107406614A (zh) * 2015-03-13 2017-11-28 巴斯夫欧洲公司 使用微波热粘合制备基于热塑性弹性体的颗粒泡沫的方法
CN108666133A (zh) * 2018-05-17 2018-10-16 东莞市威庆电子有限公司 一种pp塑料外壳电容及其制作工艺

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US3010157A (en) * 1958-10-07 1961-11-28 Monsanto Chemicals Method for preparing moldings of foamed thermoplastic resins
AU6779360A (en) * 1960-12-21 1963-01-10 The Dow Chemical Company Process for production of foamed articles from thermoplastic resinous materials
US3193874A (en) * 1963-07-16 1965-07-13 Westinghouse Electric Corp Apparatus for preparing molded articles
US3253064A (en) * 1962-04-17 1966-05-24 Robert B Buonaiuto Process for molding a foamed plastic having an outermost uniform skin
US3420923A (en) * 1963-07-29 1969-01-07 Ici Ltd Process for manufacturing foamed plastic articles having outer skin by curing with microwaves
JPS4818943B1 (fr) * 1969-11-11 1973-06-09
FR2320818A1 (fr) * 1975-08-14 1977-03-11 Vasseur Bernard Nouveau procede pour la transformation du polystyrene expansible ou toute matiere expansible par la chaleur
US4173608A (en) * 1976-10-22 1979-11-06 Isobox-Barbier Process and apparatus for the manufacture of expanded plastics materials
US4298324A (en) * 1977-09-09 1981-11-03 Isobox-Barbier Apparatus for molding particulate expandable thermoplastic resin material using microwave heating
US4454081A (en) * 1980-09-11 1984-06-12 Isobox S.A. Method and apparatus for molding expandable thermoplastic particles in molds having portions of selected porosity using UHF heating
US4765934A (en) * 1987-08-19 1988-08-23 Dominion Al-Chrome Corporation Polystyrene bead expansion process

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010157A (en) * 1958-10-07 1961-11-28 Monsanto Chemicals Method for preparing moldings of foamed thermoplastic resins
AU6779360A (en) * 1960-12-21 1963-01-10 The Dow Chemical Company Process for production of foamed articles from thermoplastic resinous materials
US3253064A (en) * 1962-04-17 1966-05-24 Robert B Buonaiuto Process for molding a foamed plastic having an outermost uniform skin
US3193874A (en) * 1963-07-16 1965-07-13 Westinghouse Electric Corp Apparatus for preparing molded articles
US3420923A (en) * 1963-07-29 1969-01-07 Ici Ltd Process for manufacturing foamed plastic articles having outer skin by curing with microwaves
JPS4818943B1 (fr) * 1969-11-11 1973-06-09
FR2320818A1 (fr) * 1975-08-14 1977-03-11 Vasseur Bernard Nouveau procede pour la transformation du polystyrene expansible ou toute matiere expansible par la chaleur
US4173608A (en) * 1976-10-22 1979-11-06 Isobox-Barbier Process and apparatus for the manufacture of expanded plastics materials
US4298324A (en) * 1977-09-09 1981-11-03 Isobox-Barbier Apparatus for molding particulate expandable thermoplastic resin material using microwave heating
US4454081A (en) * 1980-09-11 1984-06-12 Isobox S.A. Method and apparatus for molding expandable thermoplastic particles in molds having portions of selected porosity using UHF heating
US4765934A (en) * 1987-08-19 1988-08-23 Dominion Al-Chrome Corporation Polystyrene bead expansion process

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Title
DERWENT ABSTRACT ACCESSION NO. 73-34721U/24, Class A32, A13; & JP,B,48 018 943 (BUSSAN PLASTICS), June 1973 (06.73). *

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998007555A1 (fr) * 1996-08-20 1998-02-26 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede pour la fabrication de corps composites en plastique
US6165300A (en) * 1996-08-20 2000-12-26 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Process for manufacturing composite bodies made of plastics
WO1998050215A1 (fr) * 1997-05-08 1998-11-12 Trw Automotive Safety Systems Gmbh Procede de fabrication d'un volant leger
DE19829562A1 (de) * 1998-07-02 2000-01-05 Fraunhofer Ges Forschung Verfahren und Vorrichtung zum thermischen Verbinden von geschäumten Polymerpartikeln
DE19860611C1 (de) * 1998-12-29 2000-03-23 Fraunhofer Ges Forschung Verfahren zur Herstellung von Formkörpern aus Polymer-Schaumpartikeln
DE10009665C1 (de) * 2000-02-29 2002-01-24 Fraunhofer Ges Forschung Verfahren und Vorrichtung zum thermischen Verbinden von Polymerschaumpartikeln
WO2002014043A1 (fr) * 2000-08-14 2002-02-21 Blue Marble Polymers Limited Procédé de production de produits moussants biodégradables
DE20019502U1 (de) * 2000-11-16 2002-01-03 Striebel, Christhard, 70199 Stuttgart Kunststoffbauteile mit einer Rhombendodekaederinnenstruktur
CN100374274C (zh) * 2001-10-29 2008-03-12 蓝宝石聚合物有限公司 生物可降解泡沫制品及相关技术的改进
EP1453648A2 (fr) * 2001-10-29 2004-09-08 Blue Marble Polymers Limited Ameliorations apportees et associees a des produits expanses biodegradables
WO2003037598A3 (fr) * 2001-10-29 2004-03-04 Blue Marble Polymers Ltd Ameliorations apportees et associees a des produits expanses biodegradables
US7393492B2 (en) 2001-10-29 2008-07-01 Novamont S.P.A. Bio-degradable foamed products
AU2002337522B2 (en) * 2001-10-29 2008-07-03 Novamont S.P.A. Improvements in and relating to bio-degradable foamed products
EP1453648A4 (fr) * 2001-10-29 2009-01-07 Novamont Spa Ameliorations apportees et associees a des produits expanses biodegradables
DE102004049060B4 (de) * 2003-10-16 2010-04-01 Neue Materialien Bayreuth Gmbh Verfahren zur Herstellung von Formkörpern aus Polymerschaumpartikeln
WO2005051628A1 (fr) * 2003-11-27 2005-06-09 Novamont Spa Procede et appareil pour produire de la mousse biodegradable
EP1691962A1 (fr) * 2003-11-27 2006-08-23 NOVAMONT S.p.A. Procede et appareil pour produire de la mousse biodegradable
JP2007512980A (ja) * 2003-11-27 2007-05-24 ノバモント エッセ・ピー・アー 生分解性発泡体の生成方法および装置
EP1691962A4 (fr) * 2003-11-27 2010-01-27 Novamont Spa Procede et appareil pour produire de la mousse biodegradable
JP4838141B2 (ja) * 2003-11-27 2011-12-14 ノバモント エッセ・ピー・アー 生分解性発泡体の生成方法および装置
WO2007067095A1 (fr) * 2005-12-06 2007-06-14 Andrey Nikolaevich Plaksunov Procede et dispositif de formation d'articles a partir de polymeres moussants utilisant le rayonnement millimetrique
US7955547B2 (en) 2005-12-06 2011-06-07 ZAO “Elefom’ Method and device for forming articles from foaming polymers by using microwave radiation
GB2463860A (en) * 2008-08-28 2010-03-31 British Plastics Federation Moulding System and Method
WO2010076170A3 (fr) * 2008-12-30 2010-08-19 Basf Se Prise, assistée par micro-ondes, de corps de mousse/céramique mis en forme
CN102341446A (zh) * 2008-12-30 2012-02-01 巴斯夫欧洲公司 成型陶瓷/泡沫体的微波辅助固化
CN107406614A (zh) * 2015-03-13 2017-11-28 巴斯夫欧洲公司 使用微波热粘合制备基于热塑性弹性体的颗粒泡沫的方法
CN107406614B (zh) * 2015-03-13 2021-01-19 巴斯夫欧洲公司 使用微波热粘合制备基于热塑性弹性体的颗粒泡沫的方法
CN108666133A (zh) * 2018-05-17 2018-10-16 东莞市威庆电子有限公司 一种pp塑料外壳电容及其制作工艺

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