JPH05104584A - Molding method of module cover for air bag device - Google Patents
Molding method of module cover for air bag deviceInfo
- Publication number
- JPH05104584A JPH05104584A JP3269390A JP26939091A JPH05104584A JP H05104584 A JPH05104584 A JP H05104584A JP 3269390 A JP3269390 A JP 3269390A JP 26939091 A JP26939091 A JP 26939091A JP H05104584 A JPH05104584 A JP H05104584A
- Authority
- JP
- Japan
- Prior art keywords
- module cover
- gate
- mold
- molding
- air bag
- 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
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 14
- 238000001746 injection moulding Methods 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 4
- 239000011347 resin Substances 0.000 abstract description 4
- 239000002356 single layer Substances 0.000 abstract description 2
- 239000011324 bead Substances 0.000 description 5
- 239000006260 foam Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
- B29C2045/0027—Gate or gate mark locations
-
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、車両衝突時にその衝
撃、変形等を感知することにより、動作膨張して展開す
るエアバッグ装置を収納するためのカバーを成形する方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming a cover for accommodating an airbag device which is inflated and expanded by sensing the impact, deformation and the like when a vehicle collides.
【０００２】[0002]
【従来の技術】エアバッグ装置は、周知の如く車両の衝
突等の緊急時に急速に展開されるエアバッグを有したも
のである。第２図に示す如く、平常時にあっては、この
エアバッグ２は折り畳まれ、モジュールカバー１にて被
われている。このエアバッグ２は、例えばリテーナと称
される取付板３にインフレータ４と共に保持され、モジ
ュールカバー１も該取付板３にリベット５やビス、ボル
ト等で固定される。2. Description of the Related Art As is well known, an air bag device has an air bag that is rapidly deployed in an emergency such as a vehicle collision. As shown in FIG. 2, in normal times, the airbag 2 is folded and covered with the module cover 1. The airbag 2 is held together with an inflator 4 on a mounting plate 3 called a retainer, and the module cover 1 is also fixed to the mounting plate 3 with rivets 5, screws and bolts.
【０００３】モジュールカバー１には、エアバッグ２の
展開時にカバーを開裂させるための凹溝状の開裂開始
線、即ち、テアライン１Ａが設けられている。このテア
ライン１Ａは、周囲部分よりも強度が低い部分であっ
て、所定形状の薄肉部（一般には、厚さ０．５〜１．０
ｍｍ程度）として設けられており、エアバッグ２の展開
時には該テアライン１Ａの部分に沿ってモジュールカバ
ー１が開裂する。The module cover 1 is provided with a tear groove-shaped tearing start line for tearing the airbag 2 when the airbag 2 is deployed, that is, a tear line 1A. The tear line 1A is a portion having lower strength than the surrounding portion, and is a thin portion having a predetermined shape (generally, a thickness of 0.5 to 1.0).
The module cover 1 is split along the tear line 1A when the airbag 2 is deployed.
【０００４】第２図において、１Ｃは化粧ラインであ
る。また、６はボディーカバーであり、モジュールカバ
ー１の外縁部にはこのモジュールカバー１との当接面の
目隠しとなる玉縁部１Ｂが形成されている。In FIG. 2, 1C is a makeup line. Reference numeral 6 denotes a body cover, and an outer edge portion of the module cover 1 is formed with a bead portion 1B which serves as a blind for the contact surface with the module cover 1.
【０００５】従来、このようなエアバッグのモジュール
カバー材料としては、一般に発泡ウレタンインテグラル
スキンフォーム又は熱可塑性プラスチックが使用され、
所定形状の金型内にこれらの樹脂材料を注入して成形さ
れている。Conventionally, as a module cover material for such an airbag, urethane foam integral skin foam or thermoplastic is generally used.
These resin materials are poured into a mold having a predetermined shape to be molded.
【０００６】[0006]
【発明が解決しようとする課題】このようなエアバッグ
装置のモジュールカバーを成形するには、生産効率、作
業効率、製品精度等が良好であることから、射出成形法
が最も有利であると考えられる。しかしながら、射出成
形法によりモジュールカバーの製造を行なった場合、樹
脂材料の注入口（ゲート）が製品の表面に残り、製品の
美観を著しく損ねるという欠点がある。In order to mold the module cover of such an airbag device, the injection molding method is considered to be most advantageous because it has good production efficiency, work efficiency, product accuracy, and the like. Be done. However, when the module cover is manufactured by the injection molding method, there is a drawback that the injection port (gate) of the resin material remains on the surface of the product and the aesthetic appearance of the product is significantly impaired.
【０００７】本発明は上記従来の問題点を解決し、外観
上射出成形時のゲート跡がなく、美観に優れたモジュー
ルカバーを製造することができるエアバッグ装置のモジ
ュールカバーの成形方法を提供することを目的とする。The present invention solves the above-mentioned conventional problems and provides a method of molding a module cover of an air bag device, which is capable of producing a module cover which is aesthetically pleasing and has no gate marks during injection molding. The purpose is to
【０００８】[0008]
【課題を解決するための手段】本発明のエアバッグ装置
のモジュールカバーの成形方法は、エアバッグ装置のモ
ジュールカバーを合成樹脂の一色射出成形法により成形
する方法において、製品モジュールカバーの外面のうち
使用時に隠蔽される面に連通するようにサブマリンゲー
トを成形用金型に設けたことを特徴とする。A method of molding a module cover of an air bag device according to the present invention is a method of molding a module cover of an air bag device by a one-color injection molding method of synthetic resin. It is characterized in that a submarine gate is provided in a molding die so as to communicate with a surface which is hidden during use.
【０００９】[0009]
【作用】サブマリンゲートを採用することにより、製品
モジュールカバーの使用時に隠蔽される面にゲートを連
通させることが可能とされる。このため、得られるモジ
ュールカバーはその使用時においてはゲート跡が隠蔽さ
れて、外観上ゲート跡の全く見えないものとなる。By using the submarine gate, the gate can be communicated with the surface hidden when the product module cover is used. Therefore, when the module cover is used, the gate traces are hidden when the module cover is used, and the gate traces are completely invisible.
【００１０】[0010]
【実施例】以下に図面を参照して本発明の実施例につい
て詳細に説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.
【００１１】第１図は本発明の一実施方法を示す金型の
部分断面図である。FIG. 1 is a partial sectional view of a mold showing a method for carrying out the present invention.
【００１２】第１図において、１１、１２、１３は金型
であり、１４はモジュールカバー成形用キャビティ、１
５はサブマリンゲートである。図示の如く、本実施例方
法にあっては、サブマリンゲートを得られるモジュール
カバーの外縁の玉縁部の背面部に連通するように、キャ
ビティ１４の玉縁部形成用キャビティ１５ａの端部に連
結して設けられている。In FIG. 1, 11, 12, and 13 are molds, 14 is a cavity for molding a module cover, and 1 is a cavity.
5 is a submarine gate. As shown in the figure, in the method of the present embodiment, the submarine gate is connected to the end of the bead forming cavity 15a of the cavity 14 so as to communicate with the back surface of the bead of the outer edge of the module cover. Is provided.
【００１３】即ち、本実施例方法においては、金型１１
に図示の如く、金型１２、金型１３を被装し、これらの
金型１１と金型１２、１３とで形成されるモジュールカ
バー形成用キャビティ１４にサブマリンゲート１５を経
て、モジュールカバー形成用樹脂材料を注入してモジュ
ールカバーを形成する。That is, in the method of this embodiment, the mold 11 is used.
As shown in the drawing, the mold 12 and the mold 13 are covered, and the module cover forming cavity 14 formed by these mold 11 and the molds 12 and 13 is passed through the submarine gate 15 to form the module cover. A resin material is injected to form the module cover.
【００１４】このような１色成形により単層構造の成形
品を成形した後、成形品を取り出して、サブマリンゲー
ト１５の部分に形成された突起を取り去る。これによ
り、ゲート跡が残るが、このゲート跡の位置は、モジュ
ールカバーの玉縁部の背面、即ち、モジュールカバーを
エアバッグ装置に装着した際にはカバーの背面となって
見えることのない部分であるので、ゲート跡によって製
品の美観が損ねられることはない。After molding a molded product having a single-layer structure by such one-color molding, the molded product is taken out and the projections formed on the submarine gate 15 are removed. This leaves a gate mark, but the position of this gate mark is the back surface of the bead of the module cover, that is, the part that is not visible as the back surface of the cover when the module cover is attached to the airbag device. Therefore, the trace of the gate does not impair the aesthetics of the product.
【００１５】なお、図示の例は、本発明の一実施例であ
って、本発明は何ら図示の方法に限定されるものではな
い。サブマリンゲートの連通箇所は、製品モジュールカ
バーの使用時に隠蔽される箇所であれば良く、図示の玉
縁部の背面以外であっても良い。The illustrated example is one embodiment of the present invention, and the present invention is not limited to the illustrated method. The communicating place of the submarine gate may be a place hidden when the product module cover is used, and may be a place other than the back surface of the illustrated bead portion.
【００１６】[0016]
【発明の効果】以上詳述した通り、本発明のエアバッグ
装置のモジュールカバーの成形方法によれば、使用時に
おける外観上、ゲート跡が見えることのない、著しく美
観に優れ、商品価値の高いモジュールカバーを製造する
ことができる。As described in detail above, according to the method of molding the module cover of the airbag device of the present invention, the appearance of the gate is not visible during use, the appearance is extremely excellent, and the commercial value is high. A module cover can be manufactured.
【図１】第１図は本発明のエアバッグ装置のモジュール
カバーの成形方法の実施例方法を示す部分断面図であ
る。FIG. 1 is a partial cross-sectional view showing an embodiment method of a method of molding a module cover of an airbag device according to the present invention.
【図２】第２図はエアバッグ装置の断面図である。FIG. 2 is a sectional view of an airbag device.
【符号の説明】 １ モジュールカバー １Ａ テアライン １Ｂ 玉縁部 １１，１２，１３ 金型 １４ モジュールカバー成形用キャビティ １５ サブマリンゲート[Explanation of reference numerals] 1 module cover 1A tear line 1B ball edge 11, 12, 13 mold 14 module cover molding cavity 15 submarine gate
Claims (1)
成樹脂の一色射出成形法により成形する方法において、
製品モジュールカバーの外面のうち使用時に隠蔽される
面に連通するようにサブマリンゲートを成形用金型に設
けたことを特徴とするエアバッグ装置のモジュールカバ
ーの成形方法。1. A method of molding a module cover of an airbag device by a one-color injection molding method of synthetic resin,
A method for molding a module cover of an airbag device, wherein a submarine gate is provided in a molding die so as to communicate with a surface of the product module cover that is hidden during use.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26939091A JP3248200B2 (en) | 1991-10-17 | 1991-10-17 | Molding method of module cover of airbag device |
| US07/940,283 US5334340A (en) | 1991-10-17 | 1992-09-03 | Method of producing a modular cover for an air bag assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26939091A JP3248200B2 (en) | 1991-10-17 | 1991-10-17 | Molding method of module cover of airbag device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05104584A true JPH05104584A (en) | 1993-04-27 |
| JP3248200B2 JP3248200B2 (en) | 2002-01-21 |
Family
ID=17471742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26939091A Expired - Lifetime JP3248200B2 (en) | 1991-10-17 | 1991-10-17 | Molding method of module cover of airbag device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3248200B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010017913A (en) * | 2008-07-09 | 2010-01-28 | Toyota Boshoku Corp | Injection molding mold and interior trim for vehicle |
-
1991
- 1991-10-17 JP JP26939091A patent/JP3248200B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010017913A (en) * | 2008-07-09 | 2010-01-28 | Toyota Boshoku Corp | Injection molding mold and interior trim for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3248200B2 (en) | 2002-01-21 |
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