DE2309287A1 - Expanded plastics esp polystyrene with inlays - precoated or impregnated with non expanded plastics to promote bond to outer material - Google Patents

Expanded plastics esp polystyrene with inlays - precoated or impregnated with non expanded plastics to promote bond to outer material

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Publication number
DE2309287A1
DE2309287A1 DE19732309287 DE2309287A DE2309287A1 DE 2309287 A1 DE2309287 A1 DE 2309287A1 DE 19732309287 DE19732309287 DE 19732309287 DE 2309287 A DE2309287 A DE 2309287A DE 2309287 A1 DE2309287 A1 DE 2309287A1
Authority
DE
Germany
Prior art keywords
inlays
expanded plastics
plastic
polystyrene
esp
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.)
Granted
Application number
DE19732309287
Other languages
German (de)
Other versions
DE2309287C2 (en
Inventor
Rudolf Schneider
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.)
SUNPOL GmbH
Original Assignee
SUNPOL 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 SUNPOL GmbH filed Critical SUNPOL GmbH
Priority to DE19732309287 priority Critical patent/DE2309287C2/en
Publication of DE2309287A1 publication Critical patent/DE2309287A1/en
Application granted granted Critical
Publication of DE2309287C2 publication Critical patent/DE2309287C2/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02Shaping 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
    • B29C44/12Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/14Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
    • B29C44/146Shaping the lining before foaming

Landscapes

  • Laminated Bodies (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Foamed plastcis esp. expanded polystyrene articles, contg. inlays are made by introducing inlays/inserts into the mould, then introducing the unfoamed plastics and causing them to foam. The inlays are previously coated with a soln. of the foamable plastics before they are placed in the mould, thus improving the bond between inlay and surrounding material. The separate treatment of the inlays with adhesive is required.

Description

Verfahren zum Herstellen von Körpern aus geschäumten Kunststoffen Die Erfindung bezieht sich auf ein Verfahren zum Herstellen von Körpern aus geschäumten Kunststoffen, insbesondere expandierbarem Polystyrol, bei dem Einlagen in die Form eingebracht und nach dem Einbringen des unter Wärmezufuhr schäumbaren Kunststoffes in die geschlossene Form und Auslösen des Schäumvorganges mit dem Kunststoffschaum verbunden werden. Process for the production of bodies from foamed plastics The invention relates to a method for producing bodies from foamed Plastics, in particular expandable polystyrene, with the inserts in the mold introduced and after the introduction of the heat-foamable plastic into the closed form and triggering the foaming process with the plastic foam get connected.

Ein derartiges Verfahren zum Herstellen von Formkörpern, wie Platten, Schalen, Hohlkörper und Vollprofile, bei dem Kunststoffe auf der Basis von Polyurethanen in Formen geschäumt werden und in die Formkörper Klötze, Dübel oder Laschen aus Kunststoff, Holz oder Metall eingesetzt werden, ist bekannt (DT-PS 851 851).Such a method for the production of shaped bodies, such as plates, Shells, hollow bodies and solid profiles, with plastics based on polyurethane are foamed in molds and blocks, dowels or straps are made into the moldings Plastic, wood or metal are used is known (DT-PS 851 851).

Auch ist es bekannt, Fremdkörper, wie Verstrebungen, Eisenteile, z. B. Aufhängehaken, Holzteile in Polystyrol einzuschäumen ("Kunststoff- Praxis" Heft 4/April 1954).It is also known to remove foreign objects such as struts, iron parts, e.g. B. suspension hooks to foam wooden parts in polystyrene ("Plastic Practice" booklet 4 / April 1954).

Es hat sich aber ergeben, daß es schwer gelingt, eine einwandfreie Haftung der Einlagen mit dem geschäumten Kunststoff zu erhalten.It has turned out, however, that it is difficult to achieve a faultless one To maintain adhesion of the insoles with the foamed plastic.

Daher ist bereits vorgeschlagen, Versteifungsteile aus thermoplastischen Kunststoffen so auszuwählen, daß diese bezüglich der Schäumtemperatur aufeinander abgestimmt sind, daß ein Verschweißen des Versteifungsteiles mit dem Schaumstoffkörper im Zuge des Schäunivorganges eintritt. Dieses Verfahren besitzt aber den Nachteil, daß nur ganz bestimmte Kunststoffmaterialien für die Versteifungsteile Verwendung finden können.It has therefore already been proposed to make stiffening parts made of thermoplastic Select plastics in such a way that they correspond to one another with regard to the foaming temperature are matched that a welding of the stiffening part with the foam body occurs in the course of the Schäuni process. However, this method has the disadvantage that only very specific plastic materials are used for the stiffening parts can find.

Wurden beispielsweise Einlagen aus Holz verwendet, so mußten diese vor dem Einbringen in die Form mit Klebstoffen beschichtet werden. Diese Handhabung war aber sehr kompliziert, da das Einbringen in die Form erfolgen mußte, so lange der Klebstoff noch klebfähig, also nicht getrocknet war.For example, if wooden inserts were used, they had to be coated with adhesives prior to placing in the mold. This handling but it was very complicated because it had to be introduced into the mold for so long the adhesive was still tacky, i.e. not dried.

Es sind auch bereits Versuche unternommen worden, um die Haftung mit handelsüblichen Schmelzklebern, die auf Faserstoffe aufgebracht und getrocknet und später beim Schäumvorgang durch die Erwärmung wieder aktiviert wurden, zu erreichen. Auch dieses Verfahren brachte aber keine zufriedenstellenden Ergebnisse und war recht kompliziert durchzuführen.Attempts have also been made to reduce liability with commercial hot melt adhesives, which are applied to fibers and dried and were activated again later during the foaming process by the heating. However, this procedure also did not produce satisfactory results and was quite complicated to do.

Aufgabe der vorliegenden Erfindung ist ein Verfahren zum Herstellen von Körpern aus geschäumten Kunststoffen, insbesondere expandierbarem Polystyrol, mit Einlagen, bei welchem keine Klebschichten aufgebracht werden müssen und eine sichere Haftung auch dann erzielt wird, wenn die Einlage nicht vollständig von dem geschäumten Formkörper umschlossen ist.The object of the present invention is a method of production of bodies made of foamed plastics, especially expandable polystyrene, with inserts, in which no adhesive layers have to be applied and one secure adhesion is achieved even if the deposit is not completely removed from the foamed molded body is enclosed.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Einlagen vor dem Einbringen in die Form mit einer Lösung des schäumfähigen Kunststoffes behandelt werden.This object is achieved according to the invention in that the deposits treated with a solution of the foamable plastic before it is introduced into the mold will.

Zweckmäßig bestehen die Einlagen aus fasrigen Stoffen, wie Holz oder Pappe, die mit dem gelösten schäumfähigen Kunststoff ganz oder teilweise imprägniert werden. Für die Einlagen kommen außer den genannten Stoffen, wie Holz und Pappe, auch andere Faserstoffe, feste Kunststoffe und auch Metall in Frage.The inserts are expediently made of fibrous materials, such as wood or Cardboard that is completely or partially impregnated with the dissolved foamable plastic will. For the deposits come in addition to the substances mentioned, such as Wood and cardboard, also other fiber materials, solid plastics and also metal in question.

Es hat sich als vorteilhaft erwiesen, die Oberfläche der Einlagen rauh zu halten. Einlagen aus Holz sollen also nicht gehobelt werden; desgleichen sind Einlagen aus Metall vorher nicht zu polieren.It has been found to be beneficial to the surface of the deposits keep rough. So inlays made of wood should not be planed; likewise metal inserts must not be polished beforehand.

Bei Durchführung des Verfahrens gemäß der Erfindung erfolgt bei der Behandlung mit einer Lösung des schäumfähigen Kunststoffes zunächst eine feste Bindung dieses Kunststoffes mit der Einlage.When carrying out the method according to the invention takes place in the Treatment with a solution of the foamable plastic initially creates a firm bond this plastic with the insert.

Beim Schäumvorgang nach dem Einbringen der Einlagen in die Form wird durch die zum Schäumen erforderliche Wärme auch der in Lösung auf und in die Einlage gebrachte Kunststoff kleb- bzw. schweißfähig, so daß eine feste Verbindung mit dem schäumfähigen Kunststoff sichergestellt ist.During the foaming process after the deposits have been introduced into the mold due to the heat required for foaming, also that in solution on and in the insert Brought plastic adhesive or weldable, so that a firm connection with the foamable plastic is ensured.

In manchen Fällen genügt es, wenn die Lösung des schäumfähigen Kunststoffes auf die Einlagen aufgebracht wird. Als vorteilhaft hat es sich aber erwiesen, die Einlagen mit der Lösung zu tränken.In some cases it is sufficient if the solution of the foamable plastic is applied to the deposits. However, it has proven to be advantageous that the Soak insoles with the solution.

Nach dem Herausnehmen aus der Lösung sind die Einlagen nach kurzer Zeit nicht klebefähig und können, ohne daß ein besonderer Trennvorgang erforderlich ist, zum Lagern bis zur Verwendung übereinander gestapelt werden.After removing them from the solution, the deposits are sooner or later Time not sticky and can without a special separation process required are to be stacked on top of each other for storage until use.

Das Verfahren gemäß der Erfindung ist geeignet beispielsweise zum Herstellen von Polstermöbeln oder Möbelteilen, Isoliereinsätzen, Kästen, Bilderrahmen, Schalen, Behältern aller Art, Spielzeug und auch für Bauzwecke, wie isolierende Wandplatten, Schallwände etc. Auch in der Kühltechnik oder im Automobilbau kann das Verfahren zweckmäßig Anwendung finden.The method according to the invention is suitable for example for Manufacture of upholstered furniture or furniture parts, insulating inserts, boxes, picture frames, Bowls, containers of all kinds, toys and also for building purposes, such as insulating Wall panels, baffles, etc. Can also be used in cooling technology or in automobile construction the procedure is appropriately applied.

Claims (2)

Patentansprüche:Patent claims: Verfahren zum Herstellen von Körpern aus geschäumten Kunststoffen, insbesondere expandierbarem Polystyrol, bei dem Einlagen in die Form eingebracht und nach dem Einbringen des unter Wärmezufuhr schäumfähigen Kunststoffes in die geschlossene Form und Auslösen des Schäumvorganges mit dem Kunststoffschaum verbunden werden, dadurch gekennzeichnet, daß die Einlagen vor dem Einbringen in die Form mit einer Lösung des schäumfähigen Kunststoffes behandelt werden. Process for the production of bodies from foamed plastics, especially expandable polystyrene, in which deposits are introduced into the mold and after the introduction of the plastic, which can be foamed with the supply of heat, into the closed form and triggering of the foaming process connected to the plastic foam are, characterized in that the deposits before being introduced into the mold be treated with a solution of the foamable plastic. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Einlagen aus fasrigen Stoffen, wie Holz, Pappe, bestehen und mit dem gelösten schäumfähigen Kunststoff ganz oder teilweise imprägniert werden.2. The method according to claim 1, characterized in that the deposits consist of fibrous materials such as wood, cardboard and the dissolved foamable Plastic can be completely or partially impregnated.
DE19732309287 1973-02-24 1973-02-24 Process for the production of composite bodies from foamed polystyrene and an insert Expired DE2309287C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19732309287 DE2309287C2 (en) 1973-02-24 1973-02-24 Process for the production of composite bodies from foamed polystyrene and an insert

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732309287 DE2309287C2 (en) 1973-02-24 1973-02-24 Process for the production of composite bodies from foamed polystyrene and an insert

Publications (2)

Publication Number Publication Date
DE2309287A1 true DE2309287A1 (en) 1974-08-29
DE2309287C2 DE2309287C2 (en) 1982-07-29

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DE19732309287 Expired DE2309287C2 (en) 1973-02-24 1973-02-24 Process for the production of composite bodies from foamed polystyrene and an insert

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387183B (en) * 1983-10-05 1988-12-12 Distropat Ag METHOD FOR FOAMING A PART FROM POLYURETHANE FOAM ON AT LEAST ONE PART FROM WOOD OR WOOD-LIKE MATERIALS

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2014359A1 (en) * 1969-03-27 1970-11-12 Keller, Peter, 8O6O Dachau Strengthening and reinforcing plastic hard- - ware of given size and shape
DE2062839A1 (en) * 1969-12-22 1971-07-01 Caplan Ltd H Process for forming objects were made of heat-expandable plastics with a reinforcement insert

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2014359A1 (en) * 1969-03-27 1970-11-12 Keller, Peter, 8O6O Dachau Strengthening and reinforcing plastic hard- - ware of given size and shape
DE2062839A1 (en) * 1969-12-22 1971-07-01 Caplan Ltd H Process for forming objects were made of heat-expandable plastics with a reinforcement insert

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387183B (en) * 1983-10-05 1988-12-12 Distropat Ag METHOD FOR FOAMING A PART FROM POLYURETHANE FOAM ON AT LEAST ONE PART FROM WOOD OR WOOD-LIKE MATERIALS

Also Published As

Publication number Publication date
DE2309287C2 (en) 1982-07-29

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Legal Events

Date Code Title Description
OHN Withdrawal
OGA New person/name/address of the applicant
OI Miscellaneous see part 1
D2 Grant after examination
8339 Ceased/non-payment of the annual fee