EP0619777A1 - Corps moule en mousse alveolaire, son procede de fabrication et dispositif de mise en oeuvre dudit procede - Google Patents

Corps moule en mousse alveolaire, son procede de fabrication et dispositif de mise en oeuvre dudit procede

Info

Publication number
EP0619777A1
EP0619777A1 EP93923488A EP93923488A EP0619777A1 EP 0619777 A1 EP0619777 A1 EP 0619777A1 EP 93923488 A EP93923488 A EP 93923488A EP 93923488 A EP93923488 A EP 93923488A EP 0619777 A1 EP0619777 A1 EP 0619777A1
Authority
EP
European Patent Office
Prior art keywords
core
foam
mold cavity
mold
cover layer
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.)
Withdrawn
Application number
EP93923488A
Other languages
German (de)
English (en)
Inventor
Joachim Teubert
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.)
TEUBERT MASCHINENBAU GmbH
Original Assignee
TEUBERT MASCHINENBAU GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TEUBERT MASCHINENBAU GmbH filed Critical TEUBERT MASCHINENBAU GmbH
Publication of EP0619777A1 publication Critical patent/EP0619777A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B29C44/58—Moulds
    • B29C44/585—Moulds with adjustable size of the mould cavity
    • 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
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/08—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles using several expanding or moulding steps
    • B29C44/083—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another
    • B29C44/086—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another and feeding more material into the enlarged cavity
    • 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
    • B29K2105/26—Scrap or recycled material

Definitions

  • Foam molded article process for its production and device for carrying out the process.
  • the invention relates to a foam molded body, in particular in the form of a foam sheet, made of pre-expanded, granular foam material, a method for its production and an apparatus for carrying out this method with a mold cavity delimited by a plurality of movable mold walls.
  • Foam moldings made of pre-expanded granular material are usually produced in such a way that the pre-expanded material is introduced as a granular raw material - usually by blowing - into a mold cavity, then exposed to steam for caking, then essentially through the Mold walls are cooled through with water and finally ejected mechanically or pneumatically as a finished molded body from the mold cavity which is then opened.
  • the corresponding foam material that has already been recovered after mechanical comminution has also been used as the raw material for the production of such a molded foam body.
  • this has the disadvantage that it is difficult to obtain as a clean material, especially its chemical nature.
  • the moldings produced therefrom are mostly unsightly than those made from fresh raw material, which is why they often meet with rejection even where they could be used without disadvantage, for example as insulation material for construction purposes.
  • the invention is intended to remedy this. It is based on the object of being able to process recovered, shredded foam material to give molded foam bodies, in particular sheets, which are more appealing but also of higher quality than corresponding conventional, produced from recovered foam material.
  • Claims 4 and 7 specify a method which is particularly suitable for the production of the foam molded article in question or a device which is particularly suitable for carrying out this method, while the respective subclaims designate advantageous design options for these objects.
  • FIG. 1 shows a cross section through a corresponding foam molded body in the form of an insulator plate having step folds which correspond to one another on opposite edges,
  • FIG. 2 shows a somewhat schematic cross section through a device for producing such a molded foam body using the claimed method in the production of the relevant core from recovered foam material
  • 3 shows a similar cross section through the same device with an enlarged mold cavity for receiving fresh foam raw material
  • FIG. 5 shows an enlarged, somewhat schematic longitudinal section through a positioning unit with a pin-shaped holding member and a positioning member of the device according to FIGS. 2 to 4, which is coaxial therewith.
  • the molded foam body 2 shown in FIG. 1, an insulating plate has a flat, cuboid core 4 made of recovered foam material and a cover layer 6 of fresh granular foam raw material that completely and completely surrounds the core 4 in this example, which covers the outer contour of the Foam molded body 2 determined.
  • cover layer 6 corresponding step folds 8 are formed on opposite edges, which make it possible to connect a plurality of such plates flush, but overlapping one another, as is customary with insulating plates in the construction industry.
  • the device 10 shown in FIGS. 2 to 4 - but only in its parts relevant to the invention - contains a mold cavity 12 which, at least in any case, is delimited by a plurality of mold walls 14, 16, 18 and 20 which are movable relative to one another. More specifically, the two main mold walls 14 and 16 are movable towards and away from each other, as is the case with foam molds, although it is only usual for opening and closing the mold cavity, while the lateral mold walls 18 and 20 are designed in the manner of a slide and are movable in order to enter the mold cavity 12 retracted or withdrawn from this to be able to. The movement takes place in a manner known per se via guide rods 22 and 24, 26 through working cylinders 28 and 30, 32, as is customary in the relevant technology.
  • the mold 34 described so far can be divided along the dash-dotted line 24 in a conventional manner in order to open the mold cavity 12 and to remove the finished foam molded body 2 produced therein , ie to be able to eject.
  • each of the two molded parts 38 and 40 is enclosed by a box 42 and 44, which forms a steam and cooling chamber 46 and 48, respectively.
  • the mold cavity 12 can in turn be acted upon in a conventional manner, for example by means of slot nozzles (not shown) provided in the mold walls 14 and 16, with steam and possibly air.
  • spray pipes 50 Inside the steam and cooling chambers 46 and 48 there are spray pipes 50, from which cooling water can be sprayed onto the respective mold wall 14 or 16.
  • the foam material is fed to the mold cavity 12 in the usual way through one or more injectors preferably provided in the mold wall 16 (not shown). So far, the device described above is conventional with the exception of the movable mold walls 14, 18 and 20.
  • the mold cavity 12 continues outside the mold walls 18 and 20 in the form of pockets 52 and 54, which are to be covered by the slide-like mold walls 18 and 20 (as shown in FIG. 2) or are to be exposed (FIG. 3).
  • the space exposed by the retracted mold walls 18 and 20 can also expand the mold cavity 12 (FIG. 3).
  • the position and width of the pockets 52 and 54 can be determined, as shown, by insert pieces 56 and 58, respectively.
  • positioning units 60 and 62 each with a plate-shaped positioning member 64 and a coaxial, pin-shaped holding member 66, are also arranged in or on the mold walls 14 and 16, as shown in FIG 5 is shown in more detail and will be described in more detail later.
  • the mold walls 14-20 assume their position intended for the production of the core 4 of the foam molded body 2 shown in FIG. 1. That the mold cavity 12 is closed by the mold walls 14-20. In this state, the mold cavity 12 is shredded with recovered foam material, e.g. foamed polystyrene, filled, then vaporized from the chambers 46 and 48 through the mold walls 14 and 16 and finally, if necessary, also cooled in order to give the core 4 thus produced sufficient strength so that it is self-supporting.
  • recovered foam material e.g. foamed polystyrene
  • the mold cavity 12 is then expanded by withdrawing the mold walls 14, 18 and 20 according to FIG. 3, while the core 4 just formed is brought into the central position shown in FIG. 3 by the positioning units 60 and 62 and in it is held. More specifically, while the core 4 is held in suspension by the pin-shaped holding members 66, it is laterally positioned with respect to the mold walls 14 and 16 by the plate-like positioning members 64. The positioning members 64 are then withdrawn into corresponding recesses 68 in the mold walls (FIG. 5).
  • the mold cavity 12 according to FIG. 4 is now filled with fresh granular foam raw material, as far as the core 4 leaves room for it. Thereupon, the holding members 66 are also withdrawn. Now the mold cavity 12 is again vaporized from the chambers 46 and 48, as a result of which the granular foam raw material introduced last bakes together and thereby also forms a bond with the core 4. Possibly. at this stage the binding of core 4 itself is also completed.
  • the foam molded body 2 which has been completed so far, is cooled in a customary manner by water again sprayed onto the mold walls 14 and 16, after which the mold cavity 12 is opened and the molded foam body 2 is ejected.
  • This ejection can take place either by means of air which is blown from the chambers 46 and 48 through the mold walls 14 and 16 into the mold cavity 12, or else by means of the positioning members 64 provided on the mold walls 14 and 16, which thus fulfill a double function can.
  • the respective positioning member 64 is located on a hollow shaft 70, in which the associated pin-shaped holding member 66 is guided in a longitudinally movable manner and is even guided in a longitudinally movable manner in a bore 72 in the relevant mold wall, here 16.
  • the recess 68 already mentioned forms a flat, blind hole-like expansion of the bore 72 on the side of the mold cavity 12 in order to receive the positioning member 64 flush with the relevant inner wall surface 74.
  • the positioning member 64 and the holding member 66 are driven via working cylinders 76 and 78, respectively, which are shown here together and are in any case flanged to the mold wall 16 within the chamber 48. Both cylinders are double-acting.
  • the shaft 70 forms the piston rod of the cylinder 76, while the pin-shaped holding member 66 forms the piston rod of the cylinder 78 and, for this purpose, is guided in a sealed manner through the rear end wall 80 of the cylinder 76.
  • Both cylinders, 76 and 78 can be controlled separately in an adjustable manner such that the holding member 66 together with the positioning member when the mold cavity 12 is expanded as shown in FIG. 3 - ⁇ -
  • the stroke of the holding member 66 is dimensioned such that, even when the positioning member 64 is extended, it still protrudes over the latter in order to drill into the core 4. In this way, the core 4 is kept at its original height after the mold walls 18 and 20 have been withdrawn, while its lateral position with respect to the mold walls 14 and 16 is determined by the positioning members 64.
  • the mold cavity 12 can be reduced again after filling or even during the subsequent setting process by mutually approaching the mold walls 14 and 16 in order to achieve a denser product and possibly also a better connection of the cover layer 6 to the core 4 to reach.
  • a similar reduction in the size of the mold cavity can also take place during the manufacture of the core after filling with the relevant recovered foam material in order to impart greater density and strength to the core from the outset.
  • foamed polystyrene such as is available on the market under the trade name "Styrofoam”
  • other foams made of pre-expanded granular foam material are also suitable for the invention, especially foamed polyolefins such as foamed polyethylene and ge ⁇ foamed polypropylene.
  • the core 4 in particular, can consist of a certain mixture of such materials as are often unavoidable in the case of recovered foam.
  • core 4 and cover layer 6 can also be lent different materials. Insofar as these are unable to form a chemical-physical bond in the production processes under consideration here, such a desired one can also be achieved by a toothing-forming shape of the core 4. Instead of completely encasing the core 4 with the cover layer 6, this can, if desired, also be applied only on one or individual sides of the core, where improved strength and / or a perfect appearance of the molded body 2 is important.

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Un corps moulé en mousse alvéolaire, se présentant notamment sous forme de plaque en matériau alvéolaire (2), réalisé dans un matériau alvéolaire granulé préexpansé, se caractérise en ce qu'il comprend un noyau (4) réalisé dans un matériau alvéolaire usagé recyclé et comportant, sur au moins un côté, une couche de protection (6) réalisée dans un matériau alvéolaire frais, le cas échéant différent. Selon un procédé de fabrication d'un corps moulé en mousse alvéolaire (2) de ce type, il est prévu que, dans un premier temps, le noyau (4) soit réalisé de manière usuelle à partir d'un matériau alvéolaire broyé, recyclé, introduit dans la cavité d'un moule (12); que la cavité du moule soit ensuite élargie conformément au contour de l'enveloppe (6) tout en maintenant le noyau (4) dans une position définitive par rapport à la cavité élargie du moule; que ladite cavité élargie soit remplie d'un matériau alvéolaire brut, granulaire, frais, préécumé et que ce dernier soit en outre durci de manière usuelle, après quoi le corps moulé fini en mousse alvéolaire (2) est démoulé. Un dispositif (10) de mise en oeuvre dudit procédé peut comporter outre deux parois de moulage (14, 16) déplaçables l'une par rapport à l'autre, d'autres parois de moulage (18, 20) pouvant être entrées et sorties de manière coulissante, placées à la périphérie des premières parois de moulage et ayant une épaisseur correspondant à celle de la paroi de la couche de protection (6) à cet endroit là. Le dispositif peut également comprendre des organes de retenue (66) en forme de tiges qui peuvent être sortis des premières parois de moulage (14, 16) et peuvent pénétrer dans le noyau (4) moulé au début, ainsi que des organes de positionnement (64) se présentant sous forme de plaques, utilisés pour positionner latéralement le noyau par rapport auxdites parois de moulage.
EP93923488A 1992-11-04 1993-10-18 Corps moule en mousse alveolaire, son procede de fabrication et dispositif de mise en oeuvre dudit procede Withdrawn EP0619777A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19924237239 DE4237239A1 (de) 1992-11-04 1992-11-04 Schaumstofformkörper, Verfahren zu seiner Herstellung sowie Vorrichtung zur Durchführung des Verfahrens
DE4237239 1992-11-04
PCT/EP1993/002870 WO1994009982A1 (fr) 1992-11-04 1993-10-18 Corps moule en mousse alveolaire, son procede de fabrication et dispositif de mise en oeuvre dudit procede

Publications (1)

Publication Number Publication Date
EP0619777A1 true EP0619777A1 (fr) 1994-10-19

Family

ID=6472090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93923488A Withdrawn EP0619777A1 (fr) 1992-11-04 1993-10-18 Corps moule en mousse alveolaire, son procede de fabrication et dispositif de mise en oeuvre dudit procede

Country Status (3)

Country Link
EP (1) EP0619777A1 (fr)
DE (1) DE4237239A1 (fr)
WO (1) WO1994009982A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0629491A1 (fr) * 1993-06-21 1994-12-21 Wannerit Ag Procédé et dispositif pour la fabrication des objets moulés à éléments multiples en particules de plastique expansible et objets ainsi obtenus
DE4414467A1 (de) * 1994-04-26 1995-11-02 Greiz Plasttechnik Verfahren und Vorrichtung zum Schäumen von gemahlenem expandierbarem Styropor-Recyclingmaterial
DE4414468A1 (de) * 1994-04-26 1995-11-02 Greiz Plasttechnik Vorrichtung zum Befüllen von Formenwerkzeugen mit EPS-Material zum Herstellen von insbesondere plattenförmigen Werkzeugen
DE29502783U1 (de) * 1995-02-20 1996-06-20 THERA Patent GmbH & Co. KG Gesellschaft für industrielle Schutzrechte, 82229 Seefeld Behälter zum Lagern und Ausbringen einer Dentalmasse
NO318008B1 (no) * 2002-11-14 2005-01-17 Primefloor As Fremgangsmåte og anordning for fremstilling av platelegemer av plastmateriale, samt anvendelse derav
DE10304513A1 (de) * 2003-02-04 2004-08-12 Johnson Controls Interiors Gmbh & Co. Kg Schaumstoffkörper, insbesondere Ausstattungsteil für den Innenraum eines Kraftfahrzeugs, und Verfahren zu seiner Herstellung
AT500271B1 (de) * 2004-03-25 2008-02-15 Greiner Perfoam Gmbh Vorrichtung und verfahren zur herstellung eines formteils und formteilform
DE102006017484A1 (de) * 2006-04-13 2007-10-25 Schoeller Arca Systems Services Gmbh Palette aus Kunststoff mit geschäumter Deckplatte
DE102009028987B9 (de) 2009-08-28 2014-05-15 Erlenbach Gmbh Vorrichtung und Verfahren zum Herstellen von Schaumstoffblöcken
ITVI20100021A1 (it) * 2010-02-05 2011-08-06 Calzaturificio Zamberlan S R L Zeppa per calzatura in materiale plastico e procedimento per la realizzazione della suddetta
DE102020113838A1 (de) 2020-05-22 2021-11-25 Siegfried Hofmann Gmbh Formwerkzeug zur Verarbeitung von expandierbaren oder expandierten Kunststoffpartikeln
EP4249391A1 (fr) * 2022-03-21 2023-09-27 Michel Thorsten Récipient destiné au transport des marchandises, procédé de fabrication d'un récipient destiné au transport des marchandises, ainsi qu'utilisation d'au moins un récipient destiné au transport des marchandises

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US3341640A (en) * 1963-05-14 1967-09-12 Rosencrantz Fredrik H Ulfstand Process for the manufacture of pad body
US3991146A (en) * 1974-04-01 1976-11-09 Imperial Chemical Industries Limited Method of encapsulating an insert in plastics material by injection molding
IT1202066B (it) * 1985-05-31 1989-02-02 Piero Cretti Procedimento per la fabbricazione di elementi in materiale sintetico espanso dotati di strati particolarmente resistenti, impianto per attuare in detto, e prodotti cosi' ottenuti
CH668033A5 (en) * 1985-10-10 1988-11-30 Kork Ag Boswil Composite polystyrene foam mouldings - produced with two parts of different density by equipment which moves rams against tapered sides of moulds to alter mould width
DE3937618C2 (de) * 1989-11-11 1996-08-29 Heinrich Moser Verfahren und Vorrichtung zur Herstellung von Erzeugnissen aus Polystyrolschaum-Abfällen
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Also Published As

Publication number Publication date
WO1994009982A1 (fr) 1994-05-11
DE4237239A1 (de) 1994-05-05

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