DE4114289C2 - - Google Patents

Info

Publication number
DE4114289C2
DE4114289C2 DE19914114289 DE4114289A DE4114289C2 DE 4114289 C2 DE4114289 C2 DE 4114289C2 DE 19914114289 DE19914114289 DE 19914114289 DE 4114289 A DE4114289 A DE 4114289A DE 4114289 C2 DE4114289 C2 DE 4114289C2
Authority
DE
Germany
Prior art keywords
layer
foam
plastic
decorative layer
folded
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.)
Expired - Fee Related
Application number
DE19914114289
Other languages
German (de)
Other versions
DE4114289A1 (en
Inventor
Juergen Dipl.-Phys. Dr. 5800 Hagen De Mischke
Guenter 5226 Reichshof De Bagusche
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.)
GTI SCHMITZ GESELLSCHAFT fur TECHNISCHE INNOVATION KG 5220 WALDBROEL DE
Original Assignee
GTI SCHMITZ GESELLSCHAFT fur TECHNISCHE INNOVATION KG 5220 WALDBROEL DE
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 GTI SCHMITZ GESELLSCHAFT fur TECHNISCHE INNOVATION KG 5220 WALDBROEL DE filed Critical GTI SCHMITZ GESELLSCHAFT fur TECHNISCHE INNOVATION KG 5220 WALDBROEL DE
Priority to DE19914114289 priority Critical patent/DE4114289C2/de
Publication of DE4114289A1 publication Critical patent/DE4114289A1/en
Application granted granted Critical
Publication of DE4114289C2 publication Critical patent/DE4114289C2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • B29C45/14795Porous or permeable material, e.g. foam

Description

The invention relates to a method for manufacturing of laminated plastic parts with one around the edges of the plastic part bent decorative layer according to the Preamble of claim 1.

In numerous cases, such as for the Interior and exterior of motor vehicles or Also for furniture, for example, are plastic molded parts laminated with a decorative layer, which for example consists of Textile or from a leather imitation plastic structure door foil exists. Procedures for this are known where the decorative layer does not match the finished one Plastic part is glued, but in a spray mold inserted and after closing the mold with the injected thermoplastic is injected, whereby the decorative layer with the back-molded thermoplastic a welded or adhesive bond is made. This had to be done with the previous manufacturer laminated plastic parts a separate ar connect the aisle to the sprayed, plastic part removed from the mold the decorative layer on the outer edge of the art Bend the fabric part, that is, the edges of the decor layer around the edges of the plastic part and on the back of the plastic part by Ver attach glue or the like.

From DE-OS 34 34 366 it is known instead of one to injection molded semi-hard preformed decor Layer-film tray that featured with folded edges has been molded, also a soft to be back-injected  Foil with edges already folded into the injection molding form insert, but then the soft film in front back injection by applying a vacuum the surface of the mold cavity is used and must be held up. This requires sufficient appropriate training of the injection mold with suction channels, around between the mold cavity surface and the film to be able to generate the required negative pressure. Out DE-OS 39 09 065 it is for the production of skin drawn seat cushion known, a bag-shaped outer skin part which has a foamed inside Layer contains to hang together in a mold with one remaining in the finished seat cushion, Spring wire bearing frame. After closing the The molding tool is suspended in the bag-shaped outside skin part a foamable that form the seat cushion filling of the material introduced and cured. The feather wires supporting frame that the outer skin part in the Molding tool for inserting the foamable material has held sack-shaped, can not and should not from cured foamable material taken out who the. In this way is a plastic mold part with molded and on the edges of art Do not manufacture molded molded part with a bent decorative layer bar.

The invention has for its object in the Her position of laminated plastic parts with folded Decorative layer required additional, separate Process step of the subsequent production of the Decorative layer folds on the sprayed art to avoid the fabric part, but also the taste to avoid any hassle, having already moved decor inlaid in the injection mold at least up to the back injection the thermoplastic by applying a vacuum to the Pull up the surface of the mold cavity and be  lays hold.

This object is achieved by the invention management of the procedure with the characteristic notes paint the patent claim 1.

The invention is based on the finding that foam can also be injected on both sides, if the foam is double-ply and a soft-elastic is compressible foam and if they use injector into the parting plane between the two Injected foam layers. This forms between between the two layers of foam under compression of the foam material from a channel in which the Distributed plastic and the plastic to be produced part forms. The procedure according to the invention whom detects therefore a decorative layer that at least in the Area that the edge of the finished plastic part forms, with a back "lost" foam coating is provided and which is then already in the essential U-shaped folded edge into the injection molding Form is inserted so that with the help of this Double-layer foam area also on the inside side of the U-shaped decorative layer edge is the plastic can form part and the desired adhesive fold the decorative layer around the outer edge of the plastic partly integrated directly into the injection molding process.

To explain the manufacturing method according to the invention, the drawing shows in section an intermediate stage of the production of a laminated plastic part in a closed injection mold. The injection mold consists of the two tool parts 1 and 2 , in which a decorative layer 3 to be injected has been inserted, on the back of which there is a layer 4 made of a soft-elastic foam. Decorative layer 3 and foam backing 4 can expediently be bonded to one another in a prefabrication. The decorative layer 3 is inserted into the injection mold with a bent edge 5 even before the back injection. The decorative layer 3 is provided, at least in its bending area, with the foam back so that the foam back forms a double-layer foam layer in the region of the folded edge 5 of the decorative layer 3 . In the variant shown in FIG. 1 of the drawing, the thermoplastic is introduced into the injection mold by means of injection nozzles 6 which protrude through the rear, bent position of the double-layer foam layer up to the parting plane between the two foam, for which purpose the bent foam layer is expediently above the bent part of the decorative layer 3 protrudes so that injection nozzles 6 do not also have to be passed through the bent decorative layer. Due to the injection of thermoplastic plastic material directly into the parting line between the two layers of the double-layer foam layer in this variant, a channel or mold cavity is formed between the two from pressed layers of the foam, and the cavity is formed with the plastic material, which is shown in the drawing The figure continues until the decorative layer on the right-hand edge of the mold cavity in the injection mold until the folding area of the decorative layer is completely back-molded and filled with the molded plastic part. The injection mold is a plastic part with a finished folded decorative lamination layer can be removed, which is firmly connected to the back-molded plastic part at its folded edge. In the variant shown in Fig. 2 are seen for injecting the thermoplastic injection nozzles 6 before, which open outside the folded position of the double-layer foam layer 4 in the injection mold, so that the passage of the injection nozzles through the rear, folded foam layer through at Inserting the decorative layer 3 and the foam back 4 can be omitted in the injection mold.

So that the plastic material flows smoothly into the parting line between the two layers of the foam layer without pushing the folded foam layer away in the direction of flow, the edge of the folded foam layer facing the injection nozzles is designed as a beveled outlet edge, as shown in dashed lines in FIG. 2 in the state before the injection of the plastic material is indicated.

Claims (3)

1. Process for the production of laminated plastic parts with a decorative layer made of plastic or textile lamination material folded around the edges of the plastic part by back-molding the decorative layer in an injection mold with a thermoplastic provided for the plastic part, in which the decorative layer is already bent into the injection mold Edges is inserted, characterized in that the decorative layer is coated at least in its area intended for the fold with a back made of a soft-elastic foam, that the foam backing on the folded edges forms a double-layer foam layer within half of the decorative layer fold and that the thermoplastic is injected into the parting plane between the two layers of the double-layer foam layer.
2. The method according to claim 1, characterized in that that the thermoplastic at the fold area of the decorative layer due to the folded layer of the double-layer foam layer of material up to the parting line between the is injected through both layers.
3. The method according to claim 1, characterized in that the thermoplastic is outside the folded position the double-layer foam layer is injected and that the edge facing the injection point the bent location tapered out is forming.
DE19914114289 1991-05-02 1991-05-02 Expired - Fee Related DE4114289C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19914114289 DE4114289C2 (en) 1991-05-02 1991-05-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914114289 DE4114289C2 (en) 1991-05-02 1991-05-02

Publications (2)

Publication Number Publication Date
DE4114289A1 DE4114289A1 (en) 1992-11-05
DE4114289C2 true DE4114289C2 (en) 1993-02-11

Family

ID=6430795

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19914114289 Expired - Fee Related DE4114289C2 (en) 1991-05-02 1991-05-02

Country Status (1)

Country Link
DE (1) DE4114289C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10301712A1 (en) * 2003-01-13 2004-07-22 Sai Automotive Sal Gmbh Process for the production of injection molded plastic parts

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301444C2 (en) * 1993-01-20 1995-08-31 Pelz Ernst Empe Werke Method for producing a lining part and in particular a lining part produced according to it

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3434366A1 (en) * 1984-09-19 1985-08-08 Daimler Benz Ag Mould for producing mouldings by backfilling film shells with a plastics moulding compound
JPH0539853Y2 (en) * 1988-03-30 1993-10-08
AT398404B (en) * 1989-10-31 1994-12-27 Engel Gmbh Maschbau Injection mold for injectioning surface objects

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10301712A1 (en) * 2003-01-13 2004-07-22 Sai Automotive Sal Gmbh Process for the production of injection molded plastic parts
DE10301712B4 (en) * 2003-01-13 2004-11-04 Sai Automotive Sal Gmbh Process for the production of injection molded plastic parts

Also Published As

Publication number Publication date
DE4114289A1 (en) 1992-11-05

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee