WO2007000132A1 - Procede de production d'un corps moule alveolaire - Google Patents

Procede de production d'un corps moule alveolaire Download PDF

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Publication number
WO2007000132A1
WO2007000132A1 PCT/DE2006/001012 DE2006001012W WO2007000132A1 WO 2007000132 A1 WO2007000132 A1 WO 2007000132A1 DE 2006001012 W DE2006001012 W DE 2006001012W WO 2007000132 A1 WO2007000132 A1 WO 2007000132A1
Authority
WO
WIPO (PCT)
Prior art keywords
foam
carrier
cavity
foam molding
outer skin
Prior art date
Application number
PCT/DE2006/001012
Other languages
German (de)
English (en)
Inventor
Hannes Lüdtke
Original Assignee
Intier Automotive Interiors 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 Intier Automotive Interiors Gmbh filed Critical Intier Automotive Interiors Gmbh
Priority to DE112006002357T priority Critical patent/DE112006002357A5/de
Publication of WO2007000132A1 publication Critical patent/WO2007000132A1/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
    • 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
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • 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
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining

Definitions

  • the invention relates to a method for producing a
  • a foam molding having a closed-pore outer skin in a foam molding tool, wherein a suitable foam material is introduced into a cavity formed in the foam molding tool and foamed.
  • Integral foams are known whose surface, during the setting of the foam through contact with the foaming mold, forms a skin which forms a closed and resistant surface. Such integral foams enable the production of a foam molding with essentially a single process step. It is also known to first make a skin adapted to the visible outside of the decorative molding and to insert it in a suitable manner into the cavity of the foam molding tool before the cavity is foamed up. By suitably choosing the suitably different materials for the closed and resistant outer skin as well as for the foaming material used for foaming, it is possible to meet the often contradictory requirements for a durable outer skin in conjunction with a soft area arranged underneath.
  • instrument panels have not been produced to an appreciable extent from an integral foam, as instrument panels have a relatively complex shape and the surface often shows a grain, which is intended to imitate, for example, the surface of natural leather.
  • foam moldings often adhere to the foam mold even when using a release agent and can be removed regularly only with the use of large forces.
  • any unforeseen contact of the outer skin of the integral foam molding with the often sharp-edged and abrasive grain on the inside of the foam mold leads to surface damage.
  • decorative moldings for indoor Fairing of motor vehicles cause visible damage to the outer skin of the decorative molding that this can no longer be used and thus has become worthless.
  • Object of the present invention is therefore to provide a method for producing a foam molding in such a way that the foam molding is as easy to produce and can be removed easily from the Shuumformwerkmaschine to reduce the risk of visible damage to the surface of the foam molding.
  • This object is achieved in that after curing of the foam material of the foam-filled cavity is pressurized before the foam molding is removed. Due to the closed-pore outer skin of the foam molding, pressurization in the foam-filled cavity leads to compression of the foam molding and thereby also causes detachment of the outer skin of the foam molding from the surrounding foam molding tool.
  • the pressurization can occur both when using integral foams and when using an outer skin produced in a preceding method step and arranged in the cavity, since the foam molding only needs to have a closed surface in order to be compressed when pressurized. It is irrelevant to the process whether this closed outer skin is formed during foaming or produced in a separate process step and subsequently joined to the foam material.
  • pressurization of the foamed cavity facilitates removal of the foam molding from the foam molding tool, in particular with slight undercuts or very small demoulding angles. It is not necessary in all cases that the outer skin has already been completely detached from the Schumformwerkmaschine, as already by a partial detachment of the outer skin or reduction of the contact pressure of the foamed foam molding to the Schwarzumformwerkmaschinessel complete removal and removal of the foam molding is facilitated.
  • a carrier before foaming a carrier is introduced into the Schwarzumformwerkmaschinemaschine and the cavity formed by the carrier and the Schwarzumformwerkmaschinezeug is filled with foam and pressurized after curing of the foam material before the carrier with the foamed Schaumma- material is removed.
  • a carrier made of a forming, stable material with a coating of foam whose visible outer side has a closed and resistant surface.
  • the known positioning method of such instrument panels facilitate the removal and removal of the arranged in the foaming mold carrier with the associated foam molding.
  • a gaseous or a liquid pressure medium is introduced for pressurizing into the cavity.
  • the pressure medium used could be air that is blown into the cavity at the edge of the foam molding between the support and the foam molding tool.
  • any other suitable gaseous or liquid pressure medium can be used.
  • the abrasive or chemical properties should also be taken into account, so that no undesired impairment of the outer skin of the foam molding, for example by chemical reactions, etc., is to be feared.
  • the pressurization is increased stepwise or continuously up to a predetermined maximum pressure.
  • the pressurization can be adjusted and controlled depending on the shape of the foam molding to promote a uniform pressure distribution along the outer skin by a slow pressure build-up in complex shapes.
  • a counterforce which is coordinated with the pressurization of the cavity, is exerted on the carrier.
  • Conventionally used holding devices with which the carrier is held in known manner in the foaming mold and subsequently removed therefrom, are not readily adapted to withstand the forces generated by the additional pressurization. A displacement of the carrier is therefore counteracted by the additionally applied counterforce to preclude undesirable movement of the foam molding during pressurization and thereby caused gradual detachment of the outer skin of the foam mold and thereby reduce the risk of visible damage to the outer skin.
  • the pressurization of the cavity actuates a cylinder-piston device or a membrane with which the counterforce is exerted on the carrier.
  • the cavities of two adjacently arranged Schulumformwerkmaschineen be pressurized simultaneously and uniformly and the respective carriers are in operative connection with each other, so that in each case one carrier counteracts a displacement of the other carrier. Additional devices for controlling and exercising a force applied to the carrier counterforce are then not required.
  • FIG. 1 shows a foaming mold and a carrier arranged therein, which form a cavity into which a foam material used for foaming is already filled,
  • FIG. 2 shows the foaming mold shown in FIG. 1 after complete setting and hardening of the foam material
  • Fig. 3 is an initial pressurization of the cavity in the
  • Fig. 4 is a fully pressurized cavity in the
  • FIGS. 1-5 The implementation of the method according to the invention is clearly illustrated in FIGS. 1-5.
  • a foaming mold 1 and a carrier 2 arranged therein form a cavity 3.
  • the carrier 2 forms the basic shape for an instrument panel, which is to be coated to improve the look and the feel with a foam material.
  • a foam material 4 is filled and foamed.
  • Fig. 2 shows a snapshot after the complete setting and hardening of the foam material 4 in the cavity 3.
  • the foam material 4 used is an integral foam, which during the setting process at the contact surface to an inside of the 5 Foam mold train 1 hardens and forms a closed and resistant outer skin for a foam molding 6.
  • the inner side 5 of the foaming mold 1 is provided with a grain which effects a surface finish of the outer skin of the foam molding 6 which is similar to a natural leather material.
  • the entire assembly Before removal from the mold and removal of the foam molding 6 connected to the support 2 from the foam molding tool 1, the entire assembly is brought into a pressure chamber, not shown.
  • the cavity 3 containing the foam molding 6 is pressurized by introducing a suitable pressure medium.
  • the pressurization causes increasing compression of the foam molding 6 in the cavity 3 and leads to a gradual detachment of the outer skin of the foam molding 6 from the inside 5 of the Schumformwerkmaschinections 1. Since this detachment movement of the foam molding 6 is substantially perpendicular to the surface of the inner side 5 of the Schwarzumformwerkmaschines 1 Visible damage to the outer skin of the foam molding 6 is almost impossible.

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de production d'un corps moulé alvéolaire (6) dans un outil de moulage de mousse (1), une cavité (3) formée par l'outil de moulage de mousse (1) étant remplie d'une mousse appropriée (4) présentant une peau à pores fermés. Une fois la mousse (4) durcie, la cavité (3) remplie de mousse est mise sous pression, avant que le corps moulé alvéolaire (6) ne soit retiré. Un support (2) est introduit dans l'outil de moulage de mousse (1), avant que ce dernier ne soit rempli de mousse. Un milieu gazeux ou liquide sous pression est introduit dans la cavité (3) pour la mise sous pression de cette dernière. La pression est augmentée par paliers ou en continu jusqu'à une pression maximale prédéfinie. Une force antagoniste adaptée à la mise sous pression de la cavité (3) est exercée sur le support (2). Les cavités (3) de deux outils de moulage de mousse (1) adjacents, dont les supports (2) sont en liaison active, peuvent être mises sous pression simultanément et de façon égale, de sorte qu'un support (2) s'oppose à un déplacement de l'autre support (2).
PCT/DE2006/001012 2005-06-25 2006-06-13 Procede de production d'un corps moule alveolaire WO2007000132A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112006002357T DE112006002357A5 (de) 2005-06-25 2006-06-13 Verfahren zur Herstellung eines Schaumformkörpers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005029584A DE102005029584A1 (de) 2005-06-25 2005-06-25 Verfahren zur Herstellung eines Schaumformkörpers
DE102005029584.3 2005-06-25

Publications (1)

Publication Number Publication Date
WO2007000132A1 true WO2007000132A1 (fr) 2007-01-04

Family

ID=37137442

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2006/001012 WO2007000132A1 (fr) 2005-06-25 2006-06-13 Procede de production d'un corps moule alveolaire

Country Status (2)

Country Link
DE (2) DE102005029584A1 (fr)
WO (1) WO2007000132A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014211917A1 (de) * 2014-06-23 2015-12-24 Volkswagen Aktiengesellschaft Einrichtung und Verfahren zum Herstellen einer Kunststoffformhaut

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1604468A1 (de) * 1966-06-01 1970-10-29 Color Fabrik Karlheinz B Kinde Verfahren zum Ausformen von in teilbaren Formwerkzeugen hergestellten Formkoerpern und Einrichtung zur Durchfuehrung des Verfahrens
DE3505828A1 (de) * 1985-02-20 1987-01-22 Benecke Gmbh J Verfahren zur herstellung geformter kunststoffelemente sowie hierzu geeignete tiefziehvorrichtung
EP1149677A2 (fr) * 2000-04-28 2001-10-31 Volkswagen AG Procédé et dispositif pour fabriquer une double peau par embouage
DE10328909A1 (de) * 2003-06-26 2005-01-27 Peguform Gmbh & Co. Kg Automatisches Entnahmesystem für Kunststoffformhäute

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD68372A (fr) *
DE2922314A1 (de) * 1979-05-31 1981-02-12 Civag Ag Fuer Verpackungsforsc Verfahren und vorrichtung zur herstellung von formkoerpern aus schaeumbaren thermoplastischen kunststoffen
DE10022645A1 (de) * 2000-04-28 2001-10-31 Volkswagen Ag Verfahren und Vorrichtung zur Herstellung einer Doppelslushhaut
DE10311667B8 (de) * 2002-03-15 2005-07-14 Peguform Gmbh & Co. Kg Verfahren zum Hinterschäumen von Slushschichten

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1604468A1 (de) * 1966-06-01 1970-10-29 Color Fabrik Karlheinz B Kinde Verfahren zum Ausformen von in teilbaren Formwerkzeugen hergestellten Formkoerpern und Einrichtung zur Durchfuehrung des Verfahrens
DE3505828A1 (de) * 1985-02-20 1987-01-22 Benecke Gmbh J Verfahren zur herstellung geformter kunststoffelemente sowie hierzu geeignete tiefziehvorrichtung
EP1149677A2 (fr) * 2000-04-28 2001-10-31 Volkswagen AG Procédé et dispositif pour fabriquer une double peau par embouage
DE10328909A1 (de) * 2003-06-26 2005-01-27 Peguform Gmbh & Co. Kg Automatisches Entnahmesystem für Kunststoffformhäute

Also Published As

Publication number Publication date
DE102005029584A1 (de) 2007-01-04
DE112006002357A5 (de) 2008-06-05

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