JPH0796811A - Resin product and lid for air bag device - Google Patents
Resin product and lid for air bag deviceInfo
- Publication number
- JPH0796811A JPH0796811A JP5241116A JP24111693A JPH0796811A JP H0796811 A JPH0796811 A JP H0796811A JP 5241116 A JP5241116 A JP 5241116A JP 24111693 A JP24111693 A JP 24111693A JP H0796811 A JPH0796811 A JP H0796811A
- Authority
- JP
- Japan
- Prior art keywords
- lid
- foaming agent
- main body
- air bag
- thickness
- 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.)
- Pending
Links
Classifications
-
- 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
- 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
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
- B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、樹脂製の板部に薄肉
部や凸部が形成された樹脂製品に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin product in which a thin plate portion or a convex portion is formed on a resin plate portion.
【０００２】[0002]
【従来の技術】従来からこの種のものとしては、例えば
図１１及び図１２に示すように自動車の助手席乗員のた
めに配設されたのエアバック装置用リッドがある。図中
符号１はインストルメントパネル、符号２は車体３側に
固定されたエアバッグ装置本体で、この本体２にエアバ
ッグ装置用リッド４が取り付けられ、このリッド４によ
りインストルメントパネル１の開口部１ａが閉成される
ようになっている。2. Description of the Related Art Conventionally, as this type, for example, as shown in FIGS. 11 and 12, there is a lid for an air bag device which is provided for a passenger in a passenger seat of an automobile. In the drawing, reference numeral 1 is an instrument panel, reference numeral 2 is an airbag device main body fixed to the vehicle body 3 side, and an airbag device lid 4 is attached to the main body 2, and the opening portion of the instrument panel 1 is attached by the lid 4. 1a is to be closed.
【０００３】このエアバッグ装置用リッド４は、平板状
のリッド本体５と、このリッド本体５から下方に突設さ
れた「凸部」としての一対の脚部６とを有すると共に、
そのリッド本体５に溝状の薄肉部５ａが図１２に示すよ
うにコ字状に形成されている。そして、このエアバッグ
装置用リッド４は、脚部６がエアバッグ装置本体２にネ
ジ止めされて固定され、インストルメントパネル１と略
面一となっている。The airbag device lid 4 has a flat plate-shaped lid main body 5 and a pair of leg portions 6 as "projections" projecting downward from the lid main body 5.
A groove-shaped thin portion 5a is formed in the lid body 5 in a U-shape as shown in FIG. The leg portion 6 of the airbag device lid 4 is fixed to the airbag device body 2 by screwing and is substantially flush with the instrument panel 1.
【０００４】エアバッグ展開時には、その薄肉部５ａに
沿ってコ字状に破断して、ヒンジ部５ｃを中心に図１１
中二点鎖線に示すように開成するようになっている。When the airbag is deployed, the airbag is broken in a U shape along the thin portion 5a, and the hinge portion 5c is centered in FIG.
It is designed to open as shown by the middle two-dot chain line.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、このよ
うな従来のものにあっては、脚部６及び薄肉部５ａにお
いて板厚が急激に変化するため、樹脂硬化時の収縮によ
り、リッド本体５表面の脚部６に相当する部分や、薄肉
部５ａの両側に相当する部分にヒケが発生するという問
題がある。このため、予め、薄肉部５ａに対応する部分
に凹部５ｂを形成して、ヒケを目立たなくしているが、
凹部５ｂを形成するため、連続感が損なわれると共に、
造形上の自由度が制限される。また、リッド本体５表面
の脚部６に対応する部分には、依然としてヒケが外観と
して現れる、という問題がある。However, in such a conventional one, since the plate thickness changes abruptly in the leg portion 6 and the thin portion 5a, the surface of the lid body 5 is shrunk due to shrinkage during resin curing. There is a problem that sink marks are generated in a portion corresponding to the leg portion 6 of the above and a portion corresponding to both sides of the thin portion 5a. Therefore, the recess 5b is formed in advance in the portion corresponding to the thin portion 5a to make the sink mark inconspicuous.
Since the concave portion 5b is formed, the sense of continuity is impaired and
The freedom of modeling is limited. Further, there is a problem that a sink mark still appears as an appearance on a portion of the surface of the lid body 5 corresponding to the leg portion 6.
【０００６】そこで、この発明は、ヒケの発生を抑制す
る樹脂製品又はエアバッグ装置用リッドを提供すること
を課題としている。Therefore, an object of the present invention is to provide a resin product or an air bag device lid for suppressing the occurrence of sink marks.
【０００７】[0007]
【課題を解決するための手段】かかる課題を解決するた
め、請求項１記載の発明は、樹脂製の板部に凸部又は薄
肉部が形成された樹脂製品において、成型時に樹脂材料
に発泡剤を混入し、前記薄肉部の両側又は凸部において
前記発泡剤が発泡可能な肉厚に設定した樹脂製品とした
ことを特徴としている。In order to solve the above problems, the invention according to claim 1 is a resin product in which a convex portion or a thin portion is formed on a resin plate portion, and a foaming agent is added to the resin material during molding. And a resin product having a thickness that allows the foaming agent to foam on both sides or the convex portion of the thin portion.
【０００８】また、請求項２記載の発明は、インストル
メントパネルの開口部を閉成する板状のリッド本体と、
該リッド本体から延長されてエアバッグ装置本体に取り
付けられる脚部とを有すると共に、前記リッド本体にエ
アバッグ展開時に切断されて開成される溝状の薄肉部が
形成された樹脂製のエアバッグ装置用リッドにおいて、
成型時に樹脂材料に発泡剤を混入し、前記薄肉部の両側
又は脚部において前記発泡剤が発泡可能な肉厚に設定し
たエアバッグ装置用リッドとしたことを特徴としてい
る。According to a second aspect of the present invention, there is provided a plate-shaped lid main body which closes the opening of the instrument panel,
A resin air bag device having a leg portion extended from the lid body and attached to the air bag device body, and having a groove-shaped thin portion formed in the lid body to be cut and opened when the air bag is deployed. In the lid for
A lid for an airbag device is characterized in that a foaming agent is mixed into a resin material at the time of molding, and the thickness is set so that the foaming agent can be foamed on both sides or legs of the thin portion.
【０００９】[0009]
【作用】かかる請求項１に記載された構成によれば、溶
融した樹脂材料に発泡剤が混入された状態で、所定の形
状に冷却硬化される場合、樹脂材料のみでは板部の薄肉
部の両側の収縮量が大きいためヒケが発生しようとする
が、この両側部分において、発泡剤が発泡するため、相
殺されてヒケが防止されることとなる。また、凸部が形
成された部分においては、この部分は、他の部分より厚
肉であるため、樹脂材料のみでは収縮量が大きくヒケが
発生しようとするが、この部分においても、発泡剤の発
泡量が他の部分より大きいため、相殺されてヒケが防止
されることとなる。According to the structure described in claim 1, when the foaming agent is mixed in the molten resin material and the resin material is cooled and hardened into a predetermined shape, only the resin material can form a thin portion of the plate portion. Although shrinkage tends to occur due to the large amount of shrinkage on both sides, the foaming agent foams on both sides, which offsets and prevents sinkage. Further, in the portion where the convex portion is formed, since this portion is thicker than the other portions, the shrinkage amount tends to be large and shrinkage tends to occur only with the resin material. Since the amount of foaming is larger than the other parts, they are offset to prevent sink marks.
【００１０】[0010]
【実施例】以下、この発明を実施例に基づいて説明す
る。EXAMPLES The present invention will be described below based on examples.
【００１１】図１乃至図５は、この発明の第１実施例を
示すものである。従来と同一乃至均等な部材は同一符号
を付して説明する。1 to 5 show a first embodiment of the present invention. The same or equivalent members as the conventional ones will be described with the same reference numerals.
【００１２】まず構成を説明すると、図中符号１はイン
ストルメントパネル、符号２は車体３側に固定されたエ
アバッグ装置本体で、この本体２に「樹脂製品」として
のエアバッグ装置用リッド１１が取り付けられ、このリ
ッド４によりインストルメントパネル１の開口部１ａが
閉成されるようになっている。First, the structure will be described. In the figure, reference numeral 1 is an instrument panel, reference numeral 2 is an airbag apparatus main body fixed to the vehicle body 3 side, and an airbag apparatus lid 11 as a "resin product" is attached to the main body 2. Is attached, and the opening 4a of the instrument panel 1 is closed by the lid 4.
【００１３】このエアバッグ装置用リッド１１は、熱可
塑性樹脂材料に炭酸ガス系の発泡剤ｐが混入され、平板
状の「板部」としてのリッド本体１２と、このリッド本
体１２から下方に突設された「凸部」としての一対の脚
部１３とを有すると共に、そのリッド本体１２に溝状の
薄肉部１２ａが図２に示すようにコ字状に形成されてい
る。This air bag device lid 11 is made of a thermoplastic resin material mixed with a carbon dioxide-based foaming agent p, and has a lid body 12 as a flat plate portion, and a lid body 12 protruding downward. The lid body 12 has a pair of leg portions 13 as "projections", and a groove-shaped thin portion 12a is formed in a U-shape as shown in FIG.
【００１４】そして、このエアバッグ装置用リッド４
は、脚部１３がエアバッグ装置本体２にネジ止めされて
固定され、インストルメントパネル１と略面一となって
いる。なお、このリッド本体１２には、従来の凹部５ｂ
に相当する部分は形成されていない。The lid 4 for the airbag device
The legs 13 are fixed to the airbag device body 2 by screwing and are substantially flush with the instrument panel 1. It should be noted that the lid body 12 has a conventional concave portion 5b.
Is not formed.
【００１５】ここで、樹脂発泡剤ｐには、上述の炭酸ガ
ス系のものと、窒素ガス系のものがある。この実施例で
は、炭酸ガス系のものを１〜２％添加しており、製品と
しての発泡倍率が１．０２〜１．０５程度となってい
る。なお、窒素ガス系の発泡剤では、同じ発泡倍率を得
ようとすれば添加量を少なくすることが可能である。The resin foaming agent p includes the carbon dioxide gas type and the nitrogen gas type described above. In this embodiment, 1 to 2% of carbon dioxide is added, and the expansion ratio of the product is about 1.02 to 1.05. It should be noted that with a nitrogen gas-based foaming agent, the amount of addition can be reduced if the same expansion ratio is to be obtained.
【００１６】また、リッド本体１２の薄肉部１２ａは、
破断を安定させるため、厚さａが１．５ｍｍ以下に設定
され、他の部分の厚さｂは４ｍｍ以上に設定されてい
る。なお、肉厚が３ｍｍ以下の部分では、冷却速度が速
いと共に圧力が高いため、発泡剤ｐによる発泡が起こら
ない。The thin portion 12a of the lid body 12 is
In order to stabilize the breakage, the thickness a is set to 1.5 mm or less, and the thickness b of other portions is set to 4 mm or more. In the portion having a wall thickness of 3 mm or less, since the cooling rate is fast and the pressure is high, foaming by the foaming agent p does not occur.
【００１７】エアバッグ展開時には、その薄肉部１２ａ
に沿ってコ字状に破断して、ヒンジ部１２ｂを中心に図
１中二点鎖線に示すように開くようになっている。When the airbag is inflated, its thin portion 12a
It is configured to be broken in a U-shape along and to be opened around the hinge portion 12b as shown by a chain double-dashed line in FIG.
【００１８】次に、作用について説明する。Next, the operation will be described.
【００１９】かかる構成のエアバッグ装置用リッド１１
の製造は、熱可塑性樹脂材料のペレットに発泡剤ｐのペ
レットを混入した状態で、金型のキャビティ内に射出
し、冷却硬化させた後、離型して製造が完了する。The lid 11 for the air bag device having the above structure
In the production of (1), the pellets of the foaming agent p are mixed in the pellets of the thermoplastic resin material, injected into the cavity of the mold, cooled and cured, and then released to complete the production.
【００２０】この冷却硬化の際には、肉厚が変化した箇
所で収縮代が異なるが、発泡剤ｐを混入させることによ
り、収縮代の大きい部分では発泡量も大きく、結果、従
来のようなヒケが防止される。At the time of this cooling and hardening, the shrinkage margin is different at the portion where the wall thickness is changed, but by mixing the foaming agent p, the amount of foaming is large at the portion where the shrinkage margin is large. Sinks are prevented.
【００２１】具体的には、薄肉部１２ａの部分では、冷
却硬化による収縮及び発泡剤ｐによる発泡は殆ど起こら
ない。これに対し、この薄肉部１２ａの両側の部分で
は、冷却硬化による収縮が発生するが、発泡剤ｐによる
発泡も生じるため、互いに相殺されて従来のようなヒケ
が生じることがない。Specifically, in the thin portion 12a, shrinkage due to cooling and hardening and foaming due to the foaming agent p hardly occur. On the other hand, at the portions on both sides of the thin portion 12a, shrinkage occurs due to cooling and hardening, but foaming due to the foaming agent p also occurs, so that they do not cancel each other out and a sink mark as in the conventional case does not occur.
【００２２】一方、脚部１３の部分では、他の部分より
厚肉であるため、冷却硬化による収縮量が大きいが、そ
の分、発泡剤ｐによる発泡量も大きいことから、この部
分でも互いに相殺されて従来のようなヒケが生じること
がない。On the other hand, since the leg portion 13 is thicker than the other portions, the amount of shrinkage due to the cooling and hardening is large, but the amount of foaming by the foaming agent p is also large by that amount. As a result, the sink mark as in the past does not occur.
【００２３】従って、従来のような凹部５ｂを形成する
必要がなく、リッド本体１２表面を平面状にすることが
できると共に、造形状の自由度も向上させることができ
る。Therefore, it is not necessary to form the concave portion 5b as in the prior art, the surface of the lid body 12 can be made flat, and the degree of freedom in shaping can be improved.
【００２４】ところで、一般的に発泡剤ｐを添加する
と、樹脂材料の物性等が変化するため、エアバッグ装置
用リッド１１として有効に機能させるため、この実施例
では、上述のように１〜２％程度の添加量としている。By the way, in general, when the foaming agent p is added, the physical properties and the like of the resin material are changed, so that it effectively functions as the lid 11 for the air bag device. The amount added is about%.
【００２５】かかる添加量としたのは、以下の実験結果
によるものである。すなわち、エアバッグ装置は、高温
から低温の幅広い地域で使用されるため、そのリッド１
１は、低温から高温においてエアバッグ展開時に割れが
生じることなく、図１中二点鎖線に示すように開裂展開
する必要がある。特に、樹脂製品は、低温において割れ
が生じ易いため、ここでは、ー３０゜Ｃの条件下で、炭
酸ガス系の発泡剤ｐを添加した場合の試験を行った。図
４及び図５は、この時の低温割れ及び外観品質評価結果
を示す。低温割れは、高速面衝撃試験による評価結果を
示すものである。The amount of addition is based on the following experimental results. That is, the airbag device is used in a wide range of temperatures from high temperature to low temperature.
No. 1 needs to be split and expanded as shown by the chain double-dashed line in FIG. 1 without cracking when the airbag is expanded from low temperature to high temperature. In particular, since resin products are apt to crack at low temperatures, a test was carried out under the condition of −30 ° C. when the carbon dioxide-based foaming agent p was added. 4 and 5 show the results of cold cracking and appearance quality evaluation at this time. The low temperature crack shows the evaluation result by the high speed surface impact test.
【００２６】図４及び図５から明らかなように、低温割
れは発泡剤ｐ添加量が２％を越えると極端に悪化する。
また、外観品質は添加量が０．５％程度ではヒケが多少
残り、２％より多く添加すると外観に膨れ発生及びシル
バーが多くなり好ましくない。As is clear from FIGS. 4 and 5, the low temperature cracking is extremely deteriorated when the amount of the foaming agent p added exceeds 2%.
In addition, the appearance quality is not preferable when the addition amount is about 0.5%, and some sink marks remain, and when the addition amount is more than 2%, the appearance is swollen and silver is increased.
【００２７】よって、外観品質及び強度（低温割れ）を
両立させるためには、発泡剤ｐを１〜２％程度添加する
のが最適であることがわかる。Therefore, it is found that it is optimal to add the foaming agent p in an amount of about 1 to 2% in order to make appearance quality and strength (cold cracking) compatible with each other.
【００２８】また、図６乃至図８には、この発明の第２
実施例を示す。Further, FIGS. 6 to 8 show the second embodiment of the present invention.
An example is shown.
【００２９】この実施例のエアバッグ装置用リッド２１
は、図５に示すように、リッド本体２２の薄肉部２２ａ
の肉厚ｃが１．５ｍｍ以下に形成され、この薄肉部２２
ａの両側の厚肉部２２ｂの肉厚ｄが４ｍｍ以上に形成さ
れ、更に、他の部分の肉厚ｅが２〜３．５ｍｍ程度に設
定されている。この薄肉部２２ａは、図６に示すよう
に、大略Ｈ状に形成され、エアバッグ展開時にはＨ状に
開裂するようになっている。The lid 21 for the airbag apparatus of this embodiment
As shown in FIG. 5, the thin portion 22a of the lid body 22 is
Has a wall thickness c of 1.5 mm or less.
The thickness d of the thick portions 22b on both sides of a is formed to be 4 mm or more, and the thickness e of the other portions is set to about 2 to 3.5 mm. As shown in FIG. 6, the thin portion 22a is formed in an approximately H shape and is split into an H shape when the airbag is deployed.
【００３０】また、脚部２３の外側（薄肉部２２ａが形
成された側と反対側）に厚肉部２２ｃが形成され、この
厚肉部２２ｃの肉厚ｄも４ｍｍ以上に設定されている。A thick portion 22c is formed outside the leg portion 23 (on the side opposite to the side where the thin portion 22a is formed), and the thickness d of the thick portion 22c is also set to 4 mm or more.
【００３１】このようにヒケが発生する部分のみに厚肉
部２２ｂ，２２ｃを設けて積極的に発泡剤ｐを発泡させ
ることにより、薄肉部２２ａの両側のヒケ及び脚部２３
に対応する部分のヒケを有効に抑制できる。リッド本体
２２の他の部分は、発泡させる必要がないため、多少薄
くすることにより材料費を削減できる。As described above, the thick portions 22b and 22c are provided only on the portions where the sink marks are generated, and the foaming agent p is positively foamed, so that the sink marks and the leg portions 23 on both sides of the thin portion 22a are formed.
The sink mark in the portion corresponding to can be effectively suppressed. Since it is not necessary to foam other portions of the lid body 22, the material cost can be reduced by making it slightly thinner.
【００３２】また、脚部２３の根元に、厚肉部２２ｃを
形成することにより、この脚部２３の強度を向上させる
ことができると共に、図中二点鎖線に示すように開裂す
る場合のヒンジ部としての強度を確保することができ
る。Further, by forming the thick portion 22c at the base of the leg portion 23, the strength of the leg portion 23 can be improved, and the hinge in the case of splitting as shown by the chain double-dashed line in the figure. The strength as a part can be secured.
【００３３】他の構成及び作用は第１実施例と同様であ
るので説明を省略する。The other structure and operation are the same as those of the first embodiment, and the explanation thereof will be omitted.
【００３４】さらに、図９及び図１０には、この発明の
第３実施例を示す。Further, FIGS. 9 and 10 show a third embodiment of the present invention.
【００３５】この実施例のエアバッグ装置用リッド３１
は、リッド本体３２に厚さ１．５ｍｍ程度の薄肉部３２
ａが略Ｈ状に形成されると共に一般部の厚さｆが４ｍｍ
以上（発泡可能な厚さ）に形成され、更に、脚部３３の
内側近傍に厚さｇが３ｍｍ程度（発泡しない厚さ）のヒ
ンジ部３２ｂが形成されている。The lid 31 for the airbag apparatus of this embodiment
Is a thin portion 32 with a thickness of about 1.5 mm on the lid body 32.
a is formed in a substantially H shape and the thickness f of the general portion is 4 mm
The hinge portion 32b having the above thickness (thickness capable of foaming) and having a thickness g of about 3 mm (thickness that does not foam) is formed near the inside of the leg portion 33.
【００３６】このようにヒンジ部３２ｂを発泡させない
ようにすれば、この部分の強度を確保することができ、
エアバッグ展開時において、図１０中二点鎖線に示すよ
うに、開裂展開するときのヒンジ強度を確保できる。If the hinge portion 32b is not foamed in this way, the strength of this portion can be secured,
When the airbag is deployed, as shown by the chain double-dashed line in FIG. 10, it is possible to secure the hinge strength when the airbag is deployed.
【００３７】なお、上記実施例では、エアバッグ装置用
リッドにこの発明を適用したが、これに限らず、ヒケが
生じるような樹脂製品であれば他のものに適用できるこ
とは勿論である。Although the present invention is applied to the lid for the air bag device in the above embodiment, the present invention is not limited to this, and it is needless to say that the present invention can be applied to other resin products as long as a sink is generated.
【００３８】[0038]
【発明の効果】以上説明してきたように、この発明によ
れば、薄肉部や凸部があるような樹脂製品でも、発泡剤
を発泡させることにより、樹脂製品の表面に表れるヒケ
の発生を有効に防止できる、という実用上有益な効果を
発揮する。As described above, according to the present invention, even in the case of a resin product having a thin portion or a convex portion, it is possible to effectively generate the sink mark appearing on the surface of the resin product by foaming the foaming agent. It has a practically useful effect that it can be prevented.
【図１】この発明の第１実施例を示す車両インストルメ
ントパネル部分の断面図である。FIG. 1 is a sectional view of a vehicle instrument panel portion showing a first embodiment of the present invention.
【図２】この発明の第１実施例を示すエアバッグ装置用
リッドの斜視図である。FIG. 2 is a perspective view of a lid for an airbag device showing a first embodiment of the present invention.
【図３】この発明の第１実施例を示す要部を拡大した断
面図である。FIG. 3 is an enlarged sectional view of an essential part showing a first embodiment of the present invention.
【図４】この発明の第１実施例を示す発泡剤添加量に対
する強度と外観品質との関係を示すグラフ図である。FIG. 4 is a graph showing the relationship between strength and appearance quality with respect to the amount of foaming agent added according to the first embodiment of the present invention.
【図５】この発明の第１実施例を示す発泡剤添加量に対
する強度と外観品質の良否等を示す表図である。FIG. 5 is a table showing the quality of the strength and the appearance quality with respect to the amount of the foaming agent added according to the first embodiment of the present invention.
【図６】この発明の第２実施例を示す図１に相当する断
面図である。FIG. 6 is a sectional view corresponding to FIG. 1 showing a second embodiment of the present invention.
【図７】同実施例を示すエアバッグ装置用リッドの斜視
図である。FIG. 7 is a perspective view of a lid for an airbag device showing the same embodiment.
【図８】同実施例を示す図３に相当する拡大断面図であ
る。FIG. 8 is an enlarged sectional view corresponding to FIG. 3 showing the same embodiment.
【図９】この発明の第３実施例を示す図１に相当する断
面図である。FIG. 9 is a sectional view corresponding to FIG. 1 showing a third embodiment of the present invention.
【図１０】同第３実施例を示す図３に相当する断面図で
ある。FIG. 10 is a sectional view corresponding to FIG. 3 showing the third embodiment.
【図１１】従来例を示す図１に相当する断面図である。FIG. 11 is a sectional view corresponding to FIG. 1 showing a conventional example.
【図１２】同従来例を示すエアバッグ装置用リッドを示
す斜視図である。FIG. 12 is a perspective view showing a lid for an airbag apparatus showing the conventional example.
１ インストルメントパネル 1a 開口部 ３ 車体 11 エアバッグ装置用リッド（樹脂製品） 12 リッド本体（板部） 12a 薄肉部 13 脚部（凸部） ｐ 発泡剤 1 Instrument panel 1a Opening 3 Car body 11 Air bag device lid (resin product) 12 Lid body (plate) 12a Thin wall 13 Leg (convex) p Foaming agent
Claims (2)
れた樹脂製品において、 成型時に樹脂材料に発泡剤を混入し、前記薄肉部の両側
又は凸部において前記発泡剤が発泡可能な肉厚に設定し
たことを特徴とする樹脂製品。1. In a resin product in which a convex portion or a thin portion is formed on a resin plate portion, a foaming agent can be mixed into a resin material during molding, and the foaming agent can be foamed on both sides or the convex portion of the thin portion. A resin product characterized by being set to various wall thicknesses.
する板状のリッド本体と、該リッド本体から延長されて
エアバッグ装置本体に取り付けられる脚部とを有すると
共に、前記リッド本体にエアバッグ展開時に切断されて
開成される溝状の薄肉部が形成された樹脂製のエアバッ
グ装置用リッドにおいて、 成型時に樹脂材料に発泡剤を混入し、前記薄肉部の両側
又は脚部において前記発泡剤が発泡可能な肉厚に設定し
たことを特徴とするエアバッグ装置用リッド。2. A plate-shaped lid main body that closes an opening of an instrument panel, and legs that extend from the lid main body and are attached to the airbag apparatus main body, and deploy the airbag on the lid main body. In a lid for an air bag device made of resin in which a groove-shaped thin portion that is sometimes cut and opened is formed, a foaming agent is mixed into a resin material during molding, and the foaming agent is formed on both sides or legs of the thin portion. A lid for an airbag device, which has a thickness that allows foaming.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5241116A JPH0796811A (en) | 1993-09-28 | 1993-09-28 | Resin product and lid for air bag device |
| DE4436130A DE4436130A1 (en) | 1993-09-28 | 1994-09-27 | Resin products, airbag covering and process for moulding the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5241116A JPH0796811A (en) | 1993-09-28 | 1993-09-28 | Resin product and lid for air bag device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0796811A true JPH0796811A (en) | 1995-04-11 |
Family
ID=17069528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5241116A Pending JPH0796811A (en) | 1993-09-28 | 1993-09-28 | Resin product and lid for air bag device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0796811A (en) |
| DE (1) | DE4436130A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100374328C (en) * | 1997-03-26 | 2008-03-12 | 丰田自动车株式会社 | Interior member having airbag door section for use in vehicles, and its molding method |
| JP2011011580A (en) * | 2009-06-30 | 2011-01-20 | Daikyonishikawa Corp | Interior panel for vehicle having airbag door part |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19623579B4 (en) * | 1996-06-13 | 2006-04-20 | Adam Opel Ag | Automotive instrument panel made of plastic with an airbag cover |
| DE69729178T3 (en) | 1996-11-07 | 2009-09-24 | Toyota Jidosha Kabushiki Kaisha, Toyota-shi | ARRANGEMENT AND CONSTRUCTION OF A MOTOR VEHICLE / INSULATED PROTECTION DEVICE |
| DE19700584B4 (en) * | 1997-01-10 | 2005-12-08 | Ibs Brocke Gmbh & Co. Kg | Column cover for motor vehicle pillars |
| DE19720584C2 (en) | 1997-05-16 | 2000-11-23 | Porsche Ag | Side impact protection device for an occupant of a vehicle |
| DE19720587A1 (en) * | 1997-05-16 | 1998-11-19 | Porsche Ag | Side impact protection device for an occupant of a vehicle |
| DE19720585A1 (en) * | 1997-05-16 | 1998-11-19 | Porsche Ag | Side impact protection device for an occupant of a vehicle |
| DE19754825C2 (en) * | 1997-12-10 | 2001-09-20 | Brocke Kg I B S | Pillar trim for pillars of motor vehicles |
-
1993
- 1993-09-28 JP JP5241116A patent/JPH0796811A/en active Pending
-
1994
- 1994-09-27 DE DE4436130A patent/DE4436130A1/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100374328C (en) * | 1997-03-26 | 2008-03-12 | 丰田自动车株式会社 | Interior member having airbag door section for use in vehicles, and its molding method |
| JP2011011580A (en) * | 2009-06-30 | 2011-01-20 | Daikyonishikawa Corp | Interior panel for vehicle having airbag door part |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4436130A1 (en) | 1995-03-30 |
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