FR2643306A1 - Method of manufacturing a coating unit for a tire safety cushion - Google Patents

Method of manufacturing a coating unit for a tire safety cushion Download PDF

Info

Publication number
FR2643306A1
FR2643306A1 FR9001902A FR9001902A FR2643306A1 FR 2643306 A1 FR2643306 A1 FR 2643306A1 FR 9001902 A FR9001902 A FR 9001902A FR 9001902 A FR9001902 A FR 9001902A FR 2643306 A1 FR2643306 A1 FR 2643306A1
Authority
FR
Grant status
Application
Patent type
Prior art keywords
sheet
tear line
gt
lt
coating
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
FR9001902A
Other languages
French (fr)
Other versions
FR2643306B1 (en )
Inventor
Manfred Mueller
Wolfgang Henseler
Egon Katz
Alban Bossenmaier
Dietrich Hamm
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.)
Daimler-Benz AG
Original Assignee
Daimler-Benz AG
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

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
    • 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
    • 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
    • B29C37/00Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0053Moulding articles characterised by the shape of the surface, e.g. ribs, high polish
    • B29C37/0057Moulding single grooves or ribs, e.g. tear lines
    • 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
    • B29C59/00Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/007Forming single grooves or ribs, e.g. tear lines, weak spots
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215Arrangements 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
    • B60R21/2165Arrangements 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
    • 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
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/30Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005Body finishings
    • B29L2031/3038Air bag covers

Abstract

<P>L'invention concerne un procédé de fabrication d'un revêtement, pourvu d'une ligne de déchirement, pour une unité à coussin pneumatique de sécurité destinée à être montée dans un véhicule automobile, le revêtement comportant une feuille présentant à l'arrière une couche expansée.</P><P>Dans le procédé, la feuille 2 chauffée, continue dans la zone de la ligne de déchirement prévue, est soumise à un emboutissage profond de telle sorte que dans la zone de la ligne de déchirement soit créé un canal 3 en creux par rapport à la surface adjacente; <P> The invention relates to a method of manufacturing a coating, provided with a tear line for a safety air bag unit to be mounted in a motor vehicle, the coating comprising a sheet having at the back a foamed layer. </ P> <P> in the method, the sheet 2 heated, continuous in the region of the intended tearing line, is subjected to deep drawing so that the tear line region is created a hollow channel 3 with respect to the adjacent surface; dans le fond 4 du canal est produite, par estampage avec haute fréquence, une diminution d'épaisseur de paroi de la feuille 2, ce qui définit la ligne de déchirement; in the base 4 of the channel is produced by stamping with high frequency, a wall thickness reduction of the sheet 2, which defines the tear line; la feuille 2 est mise en place dans un moule et elle est soumise d'une manière connue à la formation d'une couche expansée sur l'arrière.</P><P>On obtient ainsi, de façon simple, un résultat esthétiquement satisfaisant.</P> the sheet 2 is placed in a mold and subjected in known manner to the formation of a foamed layer on the back. </ P> <P> is thus obtained in a simple manner, a result aesthetically satisfactory. </ P>

Description

La présente invention concerne un procédé de The present invention relates to a method of

fabrication d'un revêtement, pourvu d'une ligne de déchi- manufacture of a coating provided with a line déchi-

rement, pour une unité à coussin pneumatique de sécurité desti- surely, for an air bag unit security Destin-

née à être montée dans un véhicule automobile, le revête- born to be mounted in a motor vehicle, the coating

ment comportant une feuille présentant sur l'arrière une couche expansée réalisée, dans la zone de la ligne de déchirement, avec une plus petite épaisseur de paroi ment comprising a sheet having on the back a foamed layer formed in the region of the tear line, with a smaller wall thickness

que dans d'autres zones du revêtement. than in other areas of the coating.

D'après la demande de brevet allemand DE-OS3315535, il est connu un revêtement pour un coussin pneumatique According to German Patent DE-OS3315535, it is known a covering for an air bag

déployable, o deux feuilles sont soudées l'une avec l'au- deployable, where two sheets are welded with each au

tre dans la zone d'une ligne de déchirement, la résis- be in the region of a tear line, the resistant

tance au déchirement du joint soudé étant plus petite que la résistance au déchirement des feuilles proprement dites. tance to tearing of the weld is smaller than the tear strength of the sheets themselves. Un tel revêtement satisfait évidemment, en ce qui concerne la fonction de sécurité, h tous les impératifs qui lui sont imposés mais cependant sa fabrication est Such a coating satisfies obviously regarding the safety function, h all the requirements imposed on it but yet its manufacture is

compliquée du fait que deux feuilles doivent être réu- complicated because two sheets must be réu-

nies par l'intermédiaire d'outils correspondants. ned via corresponding tools. En outre, on ne peut que difficilement faire en sorte que la zone de jonction des deux feuilles ait également un In addition, it can hardly ensure that the junction zone of the two sheets is also a

aspect esthétique satisfaisant. satisfactory appearance.

En outre, d'après la demande de brevet allemand DE-OS 26 43 451, on peut déjà considérer comme connue Furthermore, according to the German patent application DE-26 43 451, can already be considered as known

l'utilisation d'un appareil de découpage à haute fré- the use of a cutting apparatus with high fre-

quence pour la réalisation d'une encoche dans une couche de rembourrage d'un coussin pneumatique (page 7, accordingly for producing a notch in a cushioning layer of a pneumatic cushion (page 7,

lignes 4 et 5). lines 4 and 5).

La présente invention a pour but de remédier aux inconvénients d!une construction conforme à la demande de brevet allemand DE-OS 33 15 535 et de créer un procédé The present invention aims to overcome the disadvantages of! A construction according to German Patent DE-OS 33 15 535 and to provide a process

d'une mise en oeuvre simple pour la fabrication d'un revê- a simple implementation for the manufacture of a revê-

tement pour une unité à coussin pneumatique, de manière à conférer simultanément un aspect esthétique correct ment for an air bag unit, so as to simultaneously impart proper aesthetics

à un revêtement ainsi réalisé. to a coating thus formed.

Ce problème est résolu conformément à l'invention par un procédé comportant les étapes opératoires suivantes: - a) la feuille chauffée, continue dans la zone de la ligne de déchirement prévue, est soumise à un emboutissage profond de telle sorte que dans la zone de la ligne de déchirement soit créé un canal en creux par rapport à la surface adjacente; This problem is solved according to the invention by a method comprising the following steps: - a) the heated sheet continues in the region of the intended tearing line, is subjected to deep drawing so that in the region of the tear line is created in a hollow channel relative to the adjacent surface;

b) dans le fond du canal est produite, par estam- b) in the channel floor is produced, for estam-

page avec haute fréquence, une diminution d'épaisseur de paroi de la feuille, ce qui définit la ligne de déchirement; page with high frequency, a decrease in wall thickness of the sheet, which defines the tear line; c) la feuille est mise en place dans un moule c) the sheet is placed in a mold

et elle est soumise d'une manière connue à la forma- and it is subjected in known manner to the formation

tion d'une couche expansée sur l'arrière. tion of a foamed layer on the back.

D'autres caractéristiques et avantages de l'invention seront mis en évidence dans la suite de la Other features and advantages of the invention will be apparent later in the

description, donnée à titre d'exemple non limitatif, en description, given by way of non-limiting example,

référence au dessin annexé dans lequel: la figure 1 représente en vue en perspective un revêtement conforme à l'invention, et la figure 2 représente, à échelle plus grande, une vue en coupe faite selon la ligne II-II de la reference to the accompanying drawings wherein: Figure 1 shows in perspective view a covering according to the invention, and Figure 2 shows, on a larger scale, a sectional view taken along line II-II of

figure 1. figure 1.

La feuille 2 formant le côté extérieur du revête- The sheet 2 forming the outer side of the coating

ment 1 est profilée, à l'état chauffé, dans un processus d'emboutissage profond, par exemple un processus d'emboutissage sous vide, de telle sorte que soit créé un canal en creux 3, qui comporte un fond 4. Dans la zone de ce fond de canal 4 est ensuite produite, par estampaqe avec haute -réquence, une diminution 5 d'épaisseur de oaroi ment 1 is profiled, in the heated state, in a deep-drawing process, for example a deep-drawing process under vacuum, so that a hollow is created in channel 3, which comprises a bottom 4. In the this channel wall 4 is then produced, for estampaqe with high -réquence, a decrease of 5 thick oaroi

qui défini- la ligne de déchirement. definition that the tear line.

A cet égard, on choisit la largeur et la profon- In this regard, we choose the width and dept of

deur du canal 3 de telle sorte que la diminution 5 d'épais- deur the channel 3 so that the decrease in 5 thick-

seur de paroi ne soit pas visible à l'oeil, au moins pour sor wall is not visible to the eye, at least for

2643O06 2643O06

l'observateur depuis sa surface. the observer from its surface.

La feuille 2 soumise à emboutissage profond est-ensuite mise en place dans un moule de formation de mousse et elle est pourvue sur l'arrière d'une couche expansée 6 qui a, dans la zone de la ligne de déchirement et d'une façon analogue à la feuille 2, The sheet 2 subjected to deep drawing is then placed in a foaming mold and is provided on the back of a foamed layer 6 which, in the region of the tear line and in a manner similar to the sheet 2,

également une zone 7 d'épaisseur de paroi réduite. also a zone 7 of reduced wall thickness.

Claims (1)

  1. REVENDICATION CLAIM
    Procédé de fabrication d'un revêtement, pourvu A method of manufacturing a coating, provided
    d'une ligne de déchirement, pour une unité à coussin pneu- a tear line for a cushion unit pneu-
    matique de sécurité destinée à être montée dans un véhicule Security matic intended to be mounted in a vehicle
    automobile, le revêtement comportant une feuille présen- automobile, the coating having a sheet présen-
    tant sur l'arrière une couche expansée réalisée, dans la zone de la ligne de déchirement, avec une plus petite épaisseur de paroi que dans d'autres zones du revêtement, caractérisé par les étapes opératoires suivantes: a) la feuille (2) chauffée, continue dans la zone de la both the rear a foamed layer formed in the region of the tear line, with a smaller wall thickness than in other areas of the coating, characterized by the following steps: a) the sheet (2) heated continues in the region of the
    ligne de déchirement prévue, est soumise à un emboutissa- intended tear line, is subjected to a emboutissa-
    ge profond de telle sorte que dans la zone de la ligne de déchirement soit créé un canal (3) en creux par rapport à la surface adjacente; ge deep such that the tear line region is created a channel (3) recessed relative to the adjacent surface; b) dans le fond (4) du canal est produite, par estaupage avec haute fréquence, une diminution d'épaisseur de paroi de la feuille (2), ce qui définit la ligne de déchirement; b) in the bottom (4) of the channel is produced by estaupage with high frequency, a reduction in thickness of wall of the sheet (2), which defines the tear line; c) la feuille (2) est mise en place dans un moule et elle est soumise d'une manière connue à la formation c) the sheet (2) is placed in a mold and subjected in known manner to the formation
    d'une couche expansée sur l'arrière. a foamed layer on the back.
FR9001902A 1989-02-18 1990-02-16 Expired - Fee Related FR2643306B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893904977 DE3904977C1 (en) 1989-02-18 1989-02-18

Publications (2)

Publication Number Publication Date
FR2643306A1 true true FR2643306A1 (en) 1990-08-24
FR2643306B1 FR2643306B1 (en) 1994-08-19

Family

ID=6374390

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9001902A Expired - Fee Related FR2643306B1 (en) 1989-02-18 1990-02-16

Country Status (4)

Country Link
JP (1) JPH0645184B2 (en)
DE (1) DE3904977C1 (en)
FR (1) FR2643306B1 (en)
GB (1) GB2228714B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03254919A (en) * 1990-03-06 1991-11-13 Takata Kk Manufacture of module cover of air bag
WO1992014632A1 (en) * 1991-02-13 1992-09-03 Allied-Signal Inc. Air bag door with unzipping seam
JPH0544714U (en) * 1991-08-09 1993-06-15 大同化成工業株式会社 Casing structure of inflatable occupant restraint device
CA2100286A1 (en) * 1992-08-13 1994-02-14 James Carter Hidden door for an air bag restraint system
DE4411283C1 (en) * 1994-03-31 1995-05-24 Daimler Benz Ag Method for mfr. of outer foil for vehicle airbag
US6001295A (en) * 1995-03-31 1999-12-14 Toyoda Gosei Co., Ltd Manufacturing method of an air bag cover
DE19516230C2 (en) * 1995-05-03 1999-04-01 Eldra Kunststofftechnik Gmbh An air bag cover as well as methods for its preparation
DE69627578D1 (en) * 1995-06-21 2003-05-28 Toyoda Gosei Kk Airbag cover, and processes for their preparation
JPH09156445A (en) * 1995-12-12 1997-06-17 Toyoda Gosei Co Ltd Air bag cover
DE19636428B4 (en) * 1996-09-07 2004-06-17 Jenoptik Ag Vehicle interior trim part with an integrated air bag cover
DE19648138A1 (en) * 1996-11-21 1998-05-28 Opel Adam Ag Air bag cover
DE19653797A1 (en) * 1996-12-21 1998-06-25 Mst Automotive Gmbh Cover for an airbag module
DE10051836A1 (en) * 2000-10-19 2002-04-25 Bayerische Motoren Werke Ag Manufacturing method for a vehicle interior trim part with an airbag tear seam

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2053565A1 (en) * 1970-10-31 1972-05-04
US3907330A (en) * 1973-12-03 1975-09-23 Toyota Motor Co Ltd Safety apparatus for steering wheel assembly
DE2643451A1 (en) * 1975-09-30 1977-04-07 Nissan Motor Air cushions for vehicles
JPH01122753A (en) * 1987-11-05 1989-05-16 Sekisui Chem Co Ltd Air-bag storage casing
DE9001948U1 (en) * 1989-02-20 1990-06-07 Takata Corp., Tokio/Tokyo, Jp

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3315535A1 (en) * 1983-04-29 1984-03-22 Daimler Benz Ag Cover for an inflatable gas bag
DE8713154U1 (en) * 1987-09-30 1987-11-12 Trw Repa Gmbh, 7077 Alfdorf, De

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2053565A1 (en) * 1970-10-31 1972-05-04
US3907330A (en) * 1973-12-03 1975-09-23 Toyota Motor Co Ltd Safety apparatus for steering wheel assembly
DE2643451A1 (en) * 1975-09-30 1977-04-07 Nissan Motor Air cushions for vehicles
JPH01122753A (en) * 1987-11-05 1989-05-16 Sekisui Chem Co Ltd Air-bag storage casing
DE9001948U1 (en) * 1989-02-20 1990-06-07 Takata Corp., Tokio/Tokyo, Jp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 13, no. 369 (M-860)[3717], 16 août 1989; & JP-A-1 122 753 (SEKISUI CHEM. CO., LTD) 16-05-1989 *

Also Published As

Publication number Publication date Type
FR2643306B1 (en) 1994-08-19 grant
JPH0645184B2 (en) 1994-06-15 grant
GB2228714B (en) 1992-09-16 grant
JPH02248238A (en) 1990-10-04 application
DE3904977C1 (en) 1990-01-18 grant
GB9002146D0 (en) 1990-03-28 grant
GB2228714A (en) 1990-09-05 application

Similar Documents

Publication Publication Date Title
US6039384A (en) Door shell of a vehicle
US6499797B1 (en) Composite component for vehicle bodywork
US5180187A (en) Cover for an airbag unit and the process for producing it
EP1069023A1 (en) Motor vehicle steering wheel
US6935260B2 (en) Notched seam design for interior trim upholstery pieces
US4626158A (en) Container seam and a process for forming a container seam
US6052901A (en) Process for production of lightweight sheet-steel wheel for vehicles
JP2000270961A (en) Backrest frame of seat for automobile
EP0491682A1 (en) Method for the manufacture of moulded articles comprising a rigid support and a flexible coating
EP0721854A1 (en) Run-flat device for vehicle and method of manufacturing the same
FR2809072A1 (en) Frame member for motor vehicle has longitudinal beam with notch to allow controlled deformation in crash
FR2829083A1 (en) motor vehicle bumper beam to intermediate sailing
US3610011A (en) Unitary roll formed vehicle fender and apparatus and method for producing the same
FR2463708A1 (en) Shock absorber assembly for car steering wheel - has deformable barrel with slits placed between wheel and column
EP0392904A1 (en) Body part for an automotive vehicle with a composite structure, in particular a hood
EP0622150A1 (en) Laser welding method of stamped workpieces flanges
US6736463B2 (en) Wheel for a motor vehicle
FR2709083A1 (en) Sheet blank of multilayer structure, with improved deep-drawability and weldability, and device for manufacturing this type of sheet blank
US20080210725A1 (en) Roof Rail
EP0247932A2 (en) Receptacle, mainly for kitchen use, obtained by embossing a decorated metallic disc
FR2567068A1 (en) Process for the manufacture of a plastic pot holder (cover)
EP1029729A1 (en) Rigid profiles made of plastics for making door frames of motor vehicles
FR2480181A1 (en) Simultaneous lamination and thermo-forming of composite panels - using corrugated card between thermoplastic layers to produce vehicle interior linings etc.
EP0791555A1 (en) Method for producing a recyclable cushion and seat including this cushion
FR2690870A1 (en) Honeycomb sandwich panel bending procedure - includes steps of bending honeycomb layer and inner and outer skins separately before sticking together

Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse

Effective date: 20051031