EP2222516A1 - Enveloppe décorative pour garniture d'airbag - Google Patents

Enveloppe décorative pour garniture d'airbag

Info

Publication number
EP2222516A1
EP2222516A1 EP08859917A EP08859917A EP2222516A1 EP 2222516 A1 EP2222516 A1 EP 2222516A1 EP 08859917 A EP08859917 A EP 08859917A EP 08859917 A EP08859917 A EP 08859917A EP 2222516 A1 EP2222516 A1 EP 2222516A1
Authority
EP
European Patent Office
Prior art keywords
decorative skin
predetermined breaking
plastic insert
breaking groove
decorative
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Withdrawn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
EP08859917A
Other languages
German (de)
English (en)
Inventor
Klaus Hemmelmann
Jeffrey Lindberg
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.)
Johnson Controls Interiors GmbH and Co KG
Original Assignee
Johnson Controls Interiors GmbH and Co KG
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 Johnson Controls Interiors GmbH and Co KG filed Critical Johnson Controls Interiors GmbH and Co KG
Publication of EP2222516A1 publication Critical patent/EP2222516A1/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Withdrawn legal-status Critical Current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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0053—Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
    • B29C37/0057—Moulding single grooves or ribs, e.g. tear lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3008—Instrument panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3038—Air bag covers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1082—Partial cutting bonded sandwich [e.g., grooving or incising]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/15—Sheet, web, or layer weakened to permit separation through thickness

Definitions

  • the invention relates to a method for producing a decorative skin of an airbag cover with a weakening, in which a predetermined breaking groove is formed in the decorative skin. Furthermore, the invention relates to a decorative skin with a weakening.
  • Decorative skins are used in the interior of motor vehicles, for example in the dashboard area and are usually made of a plastic material. These decorative skins have at least one predetermined breaking groove which, when activated, bursts open by an airbag lying beneath the decorative skin, the decorative skin being designed such that the predetermined breaking groove is not visible even after years of use of the vehicle.
  • Decorative skins and their preparation are disclosed, for example, in DE 100 01 246 B4, DE 100 06 483, DE 100 48 636 B4, DE 101 22 376 A1, DE 196 46 548 C2 and WO 2006/065750 A1.
  • the processes described therein for the production of decorative skins are comparatively complicated or the decorative skins do not have the desired long-term stability and / or are not recyclable.
  • the invention is therefore based on the object to provide a method in which a simple weakening of the decorative skin is made, which is not visible on the interior part equipped with it even after prolonged use, the decorative skin should preferably be recyclable.
  • Another object of the present invention is to provide a corresponding decorative skin.
  • the object is achieved with a method for producing a decorative skin of an airbag cover with a weakening, in which a predetermined breaking groove is formed or incorporated into the decorative skin, in which at least partially a plastic insert is inserted during or after molding or incorporation.
  • the inventive method is simple and inexpensive to perform.
  • the resulting decorative skin tears safely upon activation of an airbag along the predetermined breaking groove and the decorative skin is long-term stable, so that the predetermined breaking groove also after years of use in a vehicle is not visible. Since compatible plastic materials can also be used, the decorative skin is recyclable in this case.
  • the invention relates to the decorative skin of an airbag cover with a weakening.
  • the decorative skin is preferably made of plastic, in particular of a polymer material, for example polyurethane.
  • the production of the decorative skin preferably takes place by reaction injection molding (RIM).
  • RIM reaction injection molding
  • a predetermined breaking groove is formed or incorporated. This molding can be done, for example, during casting, injection molding or spraying process and then curing the decorative skin or by pressing with or without heat.
  • the predetermined breaking groove can also be subsequently incorporated into the decorative skin, for example by removing the decorative skin material in the region of the predetermined breaking groove.
  • the predetermined breaking groove can have any shape and any cross-sectional shape. The cross-sectional shape may change in the course of the groove, but is preferably constant over the entire Nutverlauf.
  • a plastic insert is inserted at least partially into this predetermined breaking groove, preferably over its entire length.
  • This plastic insert prevents the predetermined breaking groove from falling in or being pressed in and thus becoming visible to the vehicle occupant.
  • the tearing of the predetermined breaking groove is not adversely affected by the plastic insert.
  • the fact that the decorative skin and the insert are both made of a plastic material, recycling is simplified.
  • the insert can be made or pieced together for each predetermined breaking groove in one piece. The individual pieces of the plastic insert can be connected to each other.
  • the plastic insert is material, positive and / or non-positively connected to the predetermined breaking groove.
  • the plastic insert is placed in a tool and then filled the material of the decorative skin in the tool, particularly preferably injected, which hardens there. During curing, a cohesive bond preferably results between the plastic insert and the material of the decorative skin.
  • predetermined breaking groove is prefabricated and then the plastic insert is glued into the predetermined breaking groove and / or welded.
  • the plastic insert is pressed into the prefabricated predetermined breaking groove, particularly preferably locked.
  • the cross section of the plastic insert is at least partially slightly larger than the cross section of the predetermined breaking and / or on the predetermined breaking and / or on the plastic insert locking means are arranged, which ensure a positive and / or non-positive bond between the plastic insert and the predetermined breaking.
  • the predetermined breaking groove is first molded or incorporated into the decorative skin and then at least partially filled up by the material from which the plastic insert is made.
  • the plastic material of the insert is initially liquid or semi-liquid and then hardens in the predetermined breaking groove.
  • the production of the predetermined breaking groove and the filling of the plastic insert takes place in a tool.
  • the tool for a slide with which the predetermined breaking groove is first made.
  • the slide is then displaced to produce a cavity in the predetermined breaking groove and then the cavity filled with the material of the plastic insert, which then hardens particularly preferably in the predetermined breaking groove.
  • the filling of the material of the plastic insert can be done before or after the complete curing of the decorative skin.
  • the decorative skin can be removed from the tool before the material of the decorative skin and / or the liner are completely cured. After or when removing the decorative skin from the tool, the slider is moved back to its original position and a new decorative skin can be made.
  • the volume of the plastic insert is chosen smaller than the volume of the predetermined breaking groove.
  • the plastic insert is made of a different material is • as dje decorative skin.
  • the material of the plastic insert is a harder material than in the material from which the decorative skin is made.
  • the material of the plastic insert is chosen so that the tensile strength is reduced in the weakening, but is sufficiently pressure-resistant to avoid later collapse or indentation of the weakened area. The weakening is thus permanently invisible from the visible side (A-side) of the interior trim part.
  • the insert is preferably made of polypropylene, wherein the adhesion to the decorative skin is adjustable via adhesion promoter.
  • the decorative skin is at least partially backfoamed with a foam.
  • the arrangement of the foam is preferably carried out after the plastic insert has been arranged in the predetermined breaking groove.
  • the decorative skin is arranged on a support.
  • Another object of the present invention is a decorative skin obtainable by the method according to the invention.
  • Yet another object of the present invention is a decorative skin with a weakening, which has a predetermined breaking groove, characterized in that in the predetermined breaking groove at least partially a plastic insert is arranged.
  • the decorative skin according to the invention is simple and inexpensive to produce, long-term stable and easy to recycle.
  • the plastic insert is material, positive and / or non-positively connected to the predetermined breaking groove.
  • the plastic insert is U-shaped. • Further preferably, the plastic insert hardens in the predetermined breaking groove.
  • the decorative skin has a foam layer which is located on the opposite side of the decorative skin A side.
  • the decorative skin has a carrier layer into which a weakening is particularly preferably formed or incorporated.
  • Figures 1a - 1c show an embodiment of the method according to the invention and an embodiment of the decorative skin according to the invention.
  • FIGS. 2a-2d show a further embodiment of the method according to the invention and a further embodiment of the decorative skin according to the invention.
  • FIGS. 3a-3c show a third embodiment of the method according to the invention and a third embodiment of the decorative skin according to the invention.
  • a decorative skin 2 is first made in a tool 1, for example by injection molding or pressing.
  • a weakening 3 in the form of a preferably frame-like or U-shaped particularly preferably circumferential groove 4 is formed, which is formed by a complementary projection 5 on the tool 1 ( Figure 1a).
  • the groove 4 for example, a U-shaped plastic insert 6 is used below, the z. B. may be formed as injection molding or extrusion profile.
  • the connection between the decorative skin 2 and the plastic insert 6 is designed so that the weakening is maintained when the airbag is triggered, but the A-side 7 is sufficiently supported. Under certain circumstances, it is sufficient, the plastic insert. 6 easy to insert into the groove 2 ( Figure 1b). It is also conceivable to lock them there or even to avoid particle flying at least locally gluing or welding.
  • the thus prepared decorative skin is then preferably connected by a foam 8 to the carrier 9. This can be provided in advance or subsequently also with a weakening 10.
  • the decorative skin 2 is produced in a tool provided with a slide 11, wherein first a groove 4 is formed in the decorative skin 2 (FIG. 2 a). After adjustment of the slide 11, the cavity (groove 4 in FIG. 2b) produced thereby is filled with another material, which may also be incompatible with the decorative skin 2, for producing the plastic insert 6 which almost completely fills the groove 4 (FIG. 2c).
  • the prefabricated plastic insert 6 is first inserted into the tool 1 ( Figure 3a). Subsequently, the remaining part of the cavity is filled with the material of the decorative skin 2 (FIG. 3b). Subsequently, the foaming with the carrier 9 ( Figure 3c).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de production d'une enveloppe décorative d'une garniture d'airbag comprenant une zone d'affaiblissement dans laquelle est formée une rainure de rupture de consigne. L'invention concerne en outre une enveloppe décorative présentant une zone d'affaiblissement.
EP08859917A 2007-12-13 2008-11-28 Enveloppe décorative pour garniture d'airbag Withdrawn EP2222516A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007060584A DE102007060584A1 (de) 2007-12-13 2007-12-13 Dekorhaut für eine Airbagabdeckung
PCT/EP2008/010137 WO2009074238A1 (fr) 2007-12-13 2008-11-28 Enveloppe décorative pour garniture d'airbag

Publications (1)

Publication Number Publication Date
EP2222516A1 true EP2222516A1 (fr) 2010-09-01

Family

ID=40491102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08859917A Withdrawn EP2222516A1 (fr) 2007-12-13 2008-11-28 Enveloppe décorative pour garniture d'airbag

Country Status (5)

Country Link
US (1) US20100266802A1 (fr)
EP (1) EP2222516A1 (fr)
JP (1) JP2011506167A (fr)
DE (1) DE102007060584A1 (fr)
WO (1) WO2009074238A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009054859A1 (de) * 2009-12-17 2011-06-22 Lisa Dräxlmaier GmbH, 84137 Egalisierung einer ausgedünnten Dekorschicht
DE102010030981B4 (de) * 2010-07-06 2014-08-28 Lisa Dräxlmaier GmbH Airbagabdeckung
DE102012015253A1 (de) * 2012-08-01 2014-02-06 Volkswagen Aktiengesellschaft Verfahren zur Herstellung eines mehrschichtigen Verkleidungsteils und mehrschichtiges Verkleidungsteil
DE102015222457A1 (de) * 2015-11-13 2017-05-18 Faurecia Innenraum Systeme Gmbh Verfahren zur Herstellung einer Airbagabdeckung und Airbagabdeckung
KR101755941B1 (ko) 2015-12-14 2017-07-07 현대자동차주식회사 에어백 전개선과 발포층 사이의 고착구조가 강화된 크래쉬 패드

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611564A (en) * 1993-08-18 1997-03-18 Tip Engineering Group, Inc. Method and treatment for forming an air bag deployment opening in leather covered trim
JP2956137B2 (ja) * 1990-06-20 1999-10-04 タカタ株式会社 エアバッグ装置のモジュールカバー
DE19516230C2 (de) * 1995-05-03 1999-04-01 Eldra Kunststofftechnik Gmbh Airbag-Abdeckung sowie Verfahren zu seiner Herstellung
US5580083A (en) * 1995-10-02 1996-12-03 Davidson Textron Inc. Air bag cover with seamless interface tear seam and method and apparatus for producing same
JP3034805B2 (ja) * 1996-07-31 2000-04-17 三ツ星ベルト株式会社 インストルメントパネル
DE19646548C2 (de) 1996-10-31 1998-08-27 Sommer Allibert Lignotock Gmbh Innenverkleidungsteil für Kraftfahrzeuge mit Airbag-Ausrüstung
DE19801611A1 (de) * 1998-01-17 1999-07-22 Opel Adam Ag Innenverkleidungsteil, insbesondere für ein Kraftfahrzeug
DE10001246B4 (de) 2000-01-14 2005-12-15 Acts Advanced Car Technology Systems Gmbh & Co.Kg Airbag-Abdeckung
DE10006483C2 (de) 2000-02-14 2002-09-12 Acts Adv Car Tech Sys Gmbh Airbag-Abdeckung
DE10048636B4 (de) * 2000-09-27 2004-03-04 Jenoptik Aktiengesellschaft Fahrzeuginnenverkleidungsteil mit integrierter Airbagabdeckung und Verfahren zu dessen Herstellung
DE10122376A1 (de) 2001-05-09 2002-11-21 Draexlmaier Lisa Gmbh Verfahren und Vorrichtung zum Einbringen einer Schwächung für den Airbagbereich in eine Dekorschicht
WO2006065750A1 (fr) 2004-12-14 2006-06-22 Johnson Controls Technology Company Couvercle de coussin gonflable

Non-Patent Citations (1)

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Title
See references of WO2009074238A1 *

Also Published As

Publication number Publication date
US20100266802A1 (en) 2010-10-21
DE102007060584A1 (de) 2009-06-25
WO2009074238A1 (fr) 2009-06-18
JP2011506167A (ja) 2011-03-03

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