JPH09300400A - Manufacture of member on side of compartment integrally having air bag door part - Google Patents
Manufacture of member on side of compartment integrally having air bag door partInfo
- Publication number
- JPH09300400A JPH09300400A JP8148347A JP14834796A JPH09300400A JP H09300400 A JPH09300400 A JP H09300400A JP 8148347 A JP8148347 A JP 8148347A JP 14834796 A JP14834796 A JP 14834796A JP H09300400 A JPH09300400 A JP H09300400A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- core
- skin
- foam layer
- airbag door
- 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
Landscapes
- Air Bags (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、エアバッグドア
部を一体に有する車室側部材の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a vehicle interior side member integrally having an airbag door section.
【０００２】[0002]
【従来の技術】たとえば、自動車の助手席側に設けられ
るエアバッグ装置は、折り畳まれたエアバッグがキャニ
スタと呼ばれる収容容器内に作動装置とともに収容され
て、自動車のインストルメントパネルなど助手席前面の
車室側部材の裏側に設けられる。このエアバッグ収容容
器の上部は、エアバッグが車室内に展開できるように開
口しており、平時にあってはエアバッグドア部によって
覆われている。このエアバッグ装置は、自動車が大きな
衝撃を受けた際に前記作動装置が作動し、それにより膨
張したエアバッグがエアバッグドア部を内側から押し開
いて車室内に展開するように構成されている。2. Description of the Related Art For example, in an airbag device provided on the passenger side of a vehicle, a folded airbag is housed together with an actuating device in a container called a canister, and the front panel of the passenger seat such as an instrument panel of the vehicle is accommodated. It is provided on the back side of the passenger compartment member. The upper portion of the airbag container is open so that the airbag can be deployed in the vehicle interior, and is covered by the airbag door in normal times. This airbag device is configured such that when the automobile receives a large impact, the actuation device operates, whereby the inflated airbag pushes open the airbag door portion from inside and deploys it into the vehicle interior. .
【０００３】前記車室側部材として、エアバッグドア部
を一体に有するものがある。その車室側部材は、エアバ
ッグ膨張時に押されて破断する薄肉の破断予定部が所定
部に形成され、該破断予定部によってエアバッグドア部
が区画形成された構造からなる。このエアバッグドア部
を一体に有する車室側部材は、エアバッグドア部の周囲
に隙間がなく、外観が良好となる利点がある。As the vehicle compartment member, there is one that integrally has an airbag door portion. The vehicle-cabin-side member has a structure in which a predetermined thin portion to be broken that is pressed and broken when the airbag is inflated is formed in a predetermined portion, and the airbag door portion is partitioned and formed by the predetermined breaking portion. The passenger compartment member integrally having the airbag door portion has an advantage that there is no gap around the airbag door portion and the appearance is good.
【０００４】従来、前記エアバッグドア部を一体に有す
る車室側部材は、まず、車室側部材を合成樹脂から成形
した後、その車室側部材の裏側に熱刃やカッター等を押
しつけて前記薄肉の破断予定部を形成することによって
製造されている。しかし、前記製造方法にあっては、後
加工によって薄肉の破断予定部を形成するため、その作
業が煩わしく、また、破断予定部形成用の工具や装置が
別に必要となり経済的ではなかった。さらに、後加工に
よって薄肉の破断予定部を形成するため、その破断予定
部の位置等がバラツキ易く、品質が一定しずらい問題も
ある。Conventionally, a passenger compartment member integrally having the airbag door portion is formed by first molding the passenger compartment member from synthetic resin and then pressing a hot blade or a cutter against the back of the passenger compartment member. It is manufactured by forming the thin portion to be broken. However, in the above-described manufacturing method, since the thin portion to be fractured is formed by post-processing, the work is troublesome, and a tool and an apparatus for forming the portion to be fractured are additionally required, which is not economical. Further, since the thin portion to be broken is formed by the post-processing, the position of the portion to be broken easily varies, and the quality is difficult to be constant.
【０００５】[0005]
【発明が解決しようとする課題】この発明は、前記の点
に鑑みなされたもので、エアバッグドア部を一体に有す
る車室側部材を、簡単かつ経済的に、さらには一定品質
で製造できる方法を提供するものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and can manufacture a vehicle-cabin-side member integrally having an airbag door portion easily and economically and with a constant quality. It provides a method.
【０００６】[0006]
【課題を解決するための手段】この発明は、合成樹脂製
表皮に合成樹脂製コアが裏打ちされ、エアバッグ膨張時
に破断する破断予定部によってエアバッグドア部が区画
形成された車室側部材を、射出成形により製造する方法
であって、射出成形型のコア型に、あらかじめ前記破断
予定部と対応する位置に尖った突起を形成しておき、射
出成形型のキャビティ型内に、表面層と裏面発泡層とよ
りなる二層の表皮をその裏面発泡層が前記コア型を向く
ように配置し、前記射出成形型の閉型によりコア型の突
起先端を表皮裏面に押しつけて該表皮の裏面発泡層に切
り込みを形成した後、前記射出成形型内に溶融合成樹脂
を射出し、前記コア型の突起によってスリットの形成さ
れたコアを表皮の裏側に形成することを特徴とするエア
バッグドア部を一体に有する車室側部材の製造方法に係
る。SUMMARY OF THE INVENTION According to the present invention, there is provided a vehicle interior side member in which a synthetic resin skin is lined with a synthetic resin core, and an airbag door portion is partitioned and formed by a to-be-ruptured portion that breaks when the airbag is inflated. In the method of manufacturing by injection molding, a sharp protrusion is formed in advance on the core mold of the injection mold at a position corresponding to the portion to be broken, and a surface layer is formed in the cavity mold of the injection mold. A two-layer skin composed of a back foam layer is arranged so that the back foam layer faces the core mold, and the projection tip of the core mold is pressed against the back surface of the skin by the injection mold closing mold to foam the back surface of the skin. After forming a cut in the layer, a molten synthetic resin is injected into the injection molding die, and a core in which a slit is formed by the protrusion of the core mold is formed on the back side of the skin, an airbag door portion, one According to the method of manufacturing a vehicle interior member having the.
【０００７】[0007]
【発明の実施の形態】以下添付の図面に従ってこの発明
を詳細に説明する。図１はこの発明の製造方法によって
得られたエアバッグドア部を一体に有する車室側部材の
一例の斜視図、図２は図１の２ー２切断端面図、図３は
図２のＡ部拡大図、図４はこの発明の製造方法の一例に
関し、表皮配置時を示す射出成形型の部分断面図、図５
は同製造実施例の閉型時を示す射出成形型の部分断面
図、図６は同製造実施例の射出成形時を示す射出成形型
の部分断面図、図７は同製造実施例におけるコア型の一
部を示す斜視図、図８は他の製造実施例を示す射出成形
型の部分断面図、図９は他の実施例のコア型の一部を示
す斜視図である。DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view of an example of a vehicle interior side member integrally having an airbag door portion obtained by the manufacturing method of the present invention, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, and FIG. FIG. 4 is an enlarged view of a portion, and FIG. 4 is a partial cross-sectional view of the injection molding die showing the time when the skin is arranged, regarding an example of the manufacturing method of the present invention.
6 is a partial cross-sectional view of the injection molding die showing the same manufacturing embodiment when closed, FIG. 6 is a partial cross-sectional view of the injection molding die showing the same manufacturing embodiment during injection molding, and FIG. 7 is a core mold of the same manufacturing embodiment. FIG. 8 is a partial cross-sectional view of an injection molding die showing another manufacturing embodiment, and FIG. 9 is a perspective view showing a part of a core die of another embodiment.
【０００８】図１ないし図３に、この発明の製造方法に
よって得られたエアバッグドア部を一体に有する車室側
部材１０を示す。この車室側部材１０は、インストルメ
ントパネルとして用いられるもので、合成樹脂製表皮２
１とその裏面に射出成形により裏打ちされた合成樹脂製
コア３１とよりなる。FIG. 1 to FIG. 3 show a vehicle interior side member 10 integrally having an airbag door section obtained by the manufacturing method of the present invention. The passenger compartment member 10 is used as an instrument panel, and is made of synthetic resin skin 2.
1 and a synthetic resin core 31 backed by injection molding.
【０００９】また、この車室側部材１０の助手席側に
は、破断予定部１１により区画形成されたエアバッグド
ア部Ｄを一体に有し、その裏側に鎖線で示すようにエア
バッグ装置が１３が取り付けられる。前記破断予定部１
１は、エアバッグ膨張時に裏側から押されて破断し、エ
アバッグドア部Ｄを車室内側へ開く。符号１２はエアバ
ッグドア部Ｄの開き時にヒンジ部となる部分である。な
お、前記破断予定部１１は図１のような略Ｈ型に限らず
略Ｕ形にされることもある。Further, the passenger side of the passenger compartment member 10 integrally has an airbag door portion D defined by a planned breaking portion 11, and an airbag device is provided on the back side thereof as indicated by a chain line. 13 is attached. The to-be-ruptured portion 1
When the airbag 1 is inflated, the airbag 1 is pushed from the back side and ruptures, and the airbag door portion D is opened to the inside of the vehicle compartment. Reference numeral 12 is a portion that becomes a hinge portion when the airbag door portion D is opened. Note that the breakable portion 11 is not limited to the substantially H shape as shown in FIG. 1, but may be substantially U shape.
【００１０】合成樹脂製表皮２１は、この車室側部材１
０の表面を構成するもので、図３からよりよくわかるよ
うに、表面層２２と裏面発泡層２３の二層からなり、前
記破断予定部１１に沿って裏面発泡層２３に切り込み２
４が形成されている。この切り込み２４は、エアバッグ
膨張時に表皮２１を破断予定部１１で破断し易くするも
のである。The synthetic resin skin 21 is used for the passenger compartment member 1
As will be better understood from FIG. 3, it is composed of two layers, a front surface layer 22 and a back surface foaming layer 23, and is cut into the back surface foaming layer 23 along the breakable portion 11 as shown in FIG.
4 are formed. The notches 24 make it easier for the skin 21 to break at the planned breakage portion 11 when the airbag is inflated.
【００１１】前記表皮２１の表面層２２は、耐久性や、
表面感触性および装飾性等の点から、無発泡あるいは殆
ど発泡していない軟質塩化ビニル樹脂あるいはＴＰＯ
（ポリオレフィン系熱可塑性エラストマー樹脂）等の合
成樹脂製皮膜からなる。また、前記表皮２１の裏面発泡
層２３は、この表皮２１裏面で射出成形されるコア２１
との接着性を良好にするととに、その射出成形の際の閉
型によってなさ前記切り込み２４の形成を容易とするた
めのもので、発泡ポリプロピレン等の発泡合成樹脂から
なる。なお、この実施例の表皮２１は、パウダースラッ
シュ成形により所定形状に形成されたもので、表面層２
２がＴＰＯ、裏面発泡層２３が発泡ポリプロピレンから
なる。The surface layer 22 of the skin 21 is durable and
From the viewpoints of surface feel and decorativeness, non-foamed or almost non-foamed soft vinyl chloride resin or TPO
It is made of a synthetic resin film such as (polyolefin thermoplastic elastomer resin). Further, the back surface foam layer 23 of the skin 21 is a core 21 injection-molded on the back surface of the skin 21.
It is made of foamed synthetic resin such as foamed polypropylene to improve the adhesiveness with and to facilitate the formation of the notches 24 by closing the mold during the injection molding. The skin 21 of this embodiment is formed into a predetermined shape by powder slush molding, and the surface layer 2
2 is TPO, and the back foam layer 23 is made of expanded polypropylene.
【００１２】合成樹脂製コア３１は、この車室側部材１
０の形状保持および補強等のために前記表皮２１裏面に
射出成形されたもので、硬質塩化ビニル樹脂や、無機質
添加ポリプロピレン（ＰＰＦ）等の硬質樹脂からなる。
このコア３１には、前記破断予定部１１に沿ってスリッ
ト３２が形成されている。このスリット３２は、コア３
１の射出成形時に形成されたものである。このスリット
３２の存在により、前記破断予定部１１であらかじめコ
ア３１が破断（切断）された状態となるため、エアバッ
グ膨張時に表皮２１が破断するだけでエアバッグドア部
Ｄを開くことができ、エアバッグドア部Ｄのスムーズな
解放を可能にする。なお、前記スリット３２は、コア３
１の材質や厚み等に応じて、前記破断予定部１１に沿っ
て連続したも、あるいは断続したものとされる。The synthetic resin core 31 is used for the passenger compartment member 1.
It is injection-molded on the back surface of the skin 21 in order to retain the shape of 0 and reinforce, and is made of a hard vinyl chloride resin or a hard resin such as an inorganic-added polypropylene (PPF).
A slit 32 is formed in the core 31 along the breakable portion 11. This slit 32 is the core 3
It was formed at the time of injection molding of 1. Due to the presence of the slit 32, the core 31 is previously broken (cut) at the breakable portion 11, so that the airbag door portion D can be opened only by breaking the skin 21 when the airbag is inflated. Enables smooth release of the airbag door D. The slit 32 is formed by the core 3
Depending on the material, thickness, etc. of 1, the material may be continuous or discontinuous along the breakable portion 11.
【００１３】次に、前記車室側部材１０の製造方法の例
を示す。前記車室側部材１０は、あらかじめ公知のパウ
ダースラッシュ成形等により所定形状にした前記二層構
造の合成樹脂製表皮２１を、射出成形型に配置して前記
コア３１を射出成形するものである。Next, an example of a method of manufacturing the passenger compartment member 10 will be described. The vehicle-cabin-side member 10 is configured such that the synthetic resin skin 21 having a two-layer structure, which has been formed in a predetermined shape by a known powder slush molding or the like, is placed in an injection mold and the core 31 is injection-molded.
【００１４】図４には、この実施例で用いる射出成形型
４１について、その一部を示す。この射出成形型４１
は、コア型４２とキャビティ型４３とからなり、コア型
４２の型面４４とキャビティ型４３の型面４７間に成形
品形状のキャビティ空間を有する。前記コア型４２の型
面４４には、前記車室側部材１０の破断予定部１１と対
応する位置に突起４５が形成されている。この突起４５
は、コア型４２の一部についての斜視図である図７から
よりよく理解されるように、先端４６が尖った略Ｖ形の
もので前記破断予定部１１に沿うようにコア型の型面４
４に連続して形成されている。また、この突起４５先端
４６は、前記表皮２１の裏面発泡層２３に突き刺さって
切り込み２４を形成できる程度に鋭利となっている。こ
の突起４５のコア型型面４４からの突出量（高さ）は、
コア型４２とキャビティ型４３を閉型した際に突起先端
４６とキャビティ型４３の型面４７間に、前記表皮２１
の表面層２２の厚みと略等しい隙間を生じる程度とされ
る。FIG. 4 shows a part of the injection molding die 41 used in this embodiment. This injection mold 41
Is composed of a core mold 42 and a cavity mold 43, and has a cavity space in the shape of a molded product between the mold surface 44 of the core mold 42 and the mold surface 47 of the cavity mold 43. A protrusion 45 is formed on the mold surface 44 of the core mold 42 at a position corresponding to the breakable portion 11 of the passenger compartment member 10. This protrusion 45
As is better understood from FIG. 7, which is a perspective view of a part of the core mold 42, is a substantially V-shape having a sharp tip 46, and the mold surface of the core mold is formed so as to be along the breakable portion 11. Four
4 are continuously formed. Further, the tip end 46 of the protrusion 45 is sharp enough to pierce the back foam layer 23 of the outer skin 21 to form the cut 24. The protrusion amount (height) of the protrusion 45 from the core die surface 44 is
When the core mold 42 and the cavity mold 43 are closed, the skin 21 is formed between the protrusion tip 46 and the mold surface 47 of the cavity mold 43.
The thickness of the surface layer 22 is approximately equal to the thickness of the surface layer 22.
【００１５】まず、前記射出成形型４１のキャビティ型
４３の型面４７に、前記二層構造の表皮２１をその裏面
発泡層２３がコア型４２の型面４４を向くようにして配
置する。次いで、図５に示すようにコア型４２とキャビ
ティ型４３を閉型する。これによって、前記コア型４２
の突起４５先端４６が表皮２１の裏面発泡層２３に押し
つけられ、該裏面発泡層２３に切り込み２４を形成す
る。また、射出成形型４１内には、表皮２１の裏面発泡
層２３とコア型４２の型面４４間にコア成形空間４８が
形成される。First, the two-layered skin 21 is placed on the mold surface 47 of the cavity mold 43 of the injection molding mold 41 so that the back foam layer 23 faces the mold surface 44 of the core mold 42. Next, as shown in FIG. 5, the core mold 42 and the cavity mold 43 are closed. Accordingly, the core mold 42
The tip 45 of the projection 45 is pressed against the back foam layer 23 of the skin 21, and the notch 24 is formed in the back foam layer 23. Further, inside the injection molding die 41, a core molding space 48 is formed between the back foam layer 23 of the skin 21 and the die surface 44 of the core die 42.
【００１６】そして、前記射出成形型４１のコア成形空
間４８に、図６に示すように、射出装置４９からＰＰＦ
等の溶融合成樹脂Ｐを射出する。符号５０は射出成形型
のゲート、５１はノズル孔である。Then, in the core molding space 48 of the injection molding die 41, as shown in FIG.
The molten synthetic resin P, etc., is injected. Reference numeral 50 is an injection molding type gate, and 51 is a nozzle hole.
【００１７】射出成形型４１内に射出された合成樹脂Ｐ
は、コア成形空間４８内に充満し、冷却硬化によって前
記表皮２１の裏面発泡層２３と接着し、該表皮２１と一
体となった前記コア３１を形成する。その際、前記コア
成形空間４８内においては、コア型４２の型面から突出
した突起４５が、前記車室側部材１０の破断予定部１１
と対応する位置に存在して表皮２１の裏面発泡層２３に
押しつけられているため、その突起４５によってスリッ
ト３２がコア３１に形成される。その後、前記表皮２１
とコア３１との一体成形品を射出成形型４１から取り出
せば、前記図１および図２に示した車室側部材１０が得
られる。Synthetic resin P injected into the injection mold 41
Fills the core molding space 48 and adheres to the back foam layer 23 of the outer skin 21 by cooling and hardening to form the core 31 integrated with the outer skin 21. At that time, in the core molding space 48, the projection 45 projecting from the mold surface of the core mold 42 is provided with the projected fracture portion 11 of the passenger compartment member 10.
The slits 32 are formed in the core 31 by the protrusions 45 because they are present at a position corresponding to and are pressed against the back foam layer 23 of the skin 21. Then, the epidermis 21
When the integrally molded product of the core 31 and the core 31 is taken out from the injection molding die 41, the passenger compartment member 10 shown in FIGS. 1 and 2 is obtained.
【００１８】また、前記射出成形時、表皮２１の色や材
質等によっては、その表面層２２が裏側からコア型４２
の突起４５により強く押圧されると、表面層２２の表側
に変色を生じ、車室側部材１０の美観が幾分低下するこ
とがある。そのような場合には、図８に示すように、表
皮２１Ａとして、その破断予定部１１Ａに沿って表側か
ら裏側へ屈曲した窪み部２５Ａを設けたものを用い、そ
の窪み部２５Ａの裏面発泡層２３Ａ側からコア型４２Ａ
の突起４５Ａを表皮２１Ａに押しつけるのが好ましい。
そうすれば、例え、前記表皮２１Ａの表面層２２Ａ表面
に変色を生じても、その変色部は窪み部２５Ａ内に隠蔽
されるため、車室側部材の外観が損なわれるおそれがな
い。しかも、前記窪み部２５Ａは一種のデザイン線の役
目も果たすため、車室側部材の装飾性を向上させること
も可能である。符号４３Ａはキャビティ型を示す。At the time of the injection molding, the surface layer 22 of the outer skin 21 may face from the back side to the core mold 42 depending on the color and material of the outer skin 21.
When strongly pressed by the protrusion 45, the front side of the surface layer 22 may be discolored, and the aesthetic appearance of the passenger compartment member 10 may be somewhat deteriorated. In such a case, as shown in FIG. 8, as the outer skin 21A, one having a recessed portion 25A bent from the front side to the back side along the planned breakage portion 11A is used, and the back foam layer of the recessed portion 25A is used. Core type 42A from 23A side
It is preferable to press the projection 45A on the outer skin 21A.
In this way, even if discoloration occurs on the surface layer 22A of the outer skin 21A, the discolored portion is hidden in the recess 25A, so that the appearance of the vehicle interior side member is not impaired. Moreover, since the recess 25A also serves as a kind of design line, it is possible to improve the decorativeness of the vehicle interior side member. Reference numeral 43A indicates a cavity type.
【００１９】さらに、前記コア型４２の突起４５は、前
記のような連続したものに代えて、図９に示すコア型４
２Ｂの突起４５Ｂのように断続的なものであってもよ
い。この断続的な突起４５Ｂは、前記連続的な突起４５
と比べて前記射出成形型のコア成形空間４８を分離する
ことが少ないため、射出成形型内に射出された溶融樹脂
の流動性を妨げず、より良好なコアを形成することがで
きる。なお、この場合コアに形成されるスリットは、突
起４５Ｂ部分で形成され、突起４５間では形成されない
ため、断続的なものとなる。Further, the protrusion 45 of the core mold 42 is replaced with the continuous one as described above, and the core mold 4 shown in FIG. 9 is used.
It may be an intermittent one such as the protrusion 45B of 2B. The intermittent protrusion 45B is the continuous protrusion 45.
As compared with the above, since the core molding space 48 of the injection mold is less often separated, it is possible to form a better core without hindering the fluidity of the molten resin injected into the injection mold. In this case, the slits formed in the core are formed at the protrusions 45B and are not formed between the protrusions 45, so that the slits are intermittent.
【００２０】[0020]
【発明の効果】以上図示し説明したように、この発明の
エアバッグドア部を一体に有する車室側部材の製造方法
によれば、コアの射出成形時にエアバッグドア部の破断
予定部を形成でき、後加工によって破断予定部を形成し
なくてもよいため、きわめて作業が簡略となり、経済的
に車室側部材を製造できる。しかも、コア型に形成した
突起によって破断予定部の位置および形状が定まるた
め、常に一定した破断予定部を形成でき、エアバッグド
ア部を有する車室側部材の品質をより一定にできる効果
もある。さらに、この発明において、エアバッグドア部
の破断予定部に沿って表皮の表側から裏側へ屈曲した窪
み部を設けた表皮を用いれば、破断予定部の外観がより
良好な車室側部材が得られる効果もある。As shown and described above, according to the method for manufacturing the vehicle interior side member integrally having the airbag door portion of the present invention, the portion to be broken of the airbag door portion is formed at the time of injection molding of the core. In addition, since it is not necessary to form a portion to be broken by post-processing, the work is extremely simplified, and the vehicle interior side member can be economically manufactured. Moreover, since the position and shape of the portion to be fractured is determined by the protrusion formed in the core type, a constant portion to be fractured can be formed at all times, and there is an effect that the quality of the passenger compartment member having the airbag door portion can be made more constant. . Further, in this invention, by using a skin provided with a recessed portion that is bent from the front side to the back side of the skin along the planned breakage portion of the airbag door portion, a cabin-side member having a better appearance of the planned breakage portion is obtained. There is also the effect.
【図１】この発明の製造方法によって得られたエアバッ
グドア部を一体に有する車室側部材の一例の斜視図であ
る。FIG. 1 is a perspective view of an example of a vehicle interior side member integrally having an airbag door section obtained by a manufacturing method of the present invention.
【図２】図１の２ー２切断端面図である。FIG. 2 is a sectional view taken along line 2-2 of FIG.
【図３】図２のＡ部拡大図である。FIG. 3 is an enlarged view of part A of FIG.
【図４】この発明の製造方法の一例に関し、表皮配置時
を示す射出成形型の部分断面図である。FIG. 4 is a partial cross-sectional view of an injection molding die showing a case where a skin is arranged, regarding an example of the manufacturing method of the present invention.
【図５】同製造実施例の閉型時を示す射出成形型の部分
断面図である。FIG. 5 is a partial cross-sectional view of the injection mold showing the same manufacturing example when the mold is closed.
【図６】同製造実施例の射出成形時を示す射出成形型の
部分断面図である。FIG. 6 is a partial cross-sectional view of an injection molding die showing the injection molding according to the same manufacturing example.
【図７】同製造実施例におけるコア型の一部を示す斜視
図である。FIG. 7 is a perspective view showing a part of a core mold in the same manufacturing example.
【図８】他の製造実施例を示す射出成形型の部分断面図
である。FIG. 8 is a partial cross-sectional view of an injection mold showing another manufacturing example.
【図９】他の実施例のコア型の一部を示す斜視図であ
る。FIG. 9 is a perspective view showing a part of a core mold of another embodiment.
１０：車室側部材 １１：破断予定部 ２１：表皮 ２２：表面層 ２３：裏面発泡層 ２４：切り込み ２５Ａ：表皮の窪み部 ３１：コア ３２：スリット ４２：コア型 ４３：キャビティ型 ４５：突起 Ｄ：エアバッグドア部 Ｐ：溶融合成樹脂 10: Vehicle side member 11: Expected breakage 21: Skin 22: Surface layer 23: Foam back layer 24: Notch 25A: Depth of skin 31: Core 32: Slit 42: Core type 43: Cavity type 45: Protrusion D : Airbag door P: Molten synthetic resin
Claims (2)
ちされ、エアバッグ膨張時に破断する破断予定部によっ
てエアバッグドア部が区画形成された車室側部材を、射
出成形により製造する方法であって、 射出成形型のコア型に、あらかじめ前記破断予定部と対
応する位置に尖った突起を形成しておき、 射出成形型のキャビティ型内に、表面層と裏面発泡層と
よりなる二層の表皮をその裏面発泡層が前記コア型を向
くように配置し、 前記射出成形型の閉型によりコア型の突起先端を表皮裏
面に押しつけて該表皮の裏面発泡層に切り込みを形成し
た後、 前記射出成形型内に溶融合成樹脂を射出し、前記コア型
の突起によってスリットの形成されたコアを表皮の裏側
に形成することを特徴とするエアバッグドア部を一体に
有する車室側部材の製造方法。1. A method of manufacturing a vehicle interior side member by injection molding, wherein a synthetic resin skin is lined with a synthetic resin core, and an airbag door section is defined by a ruptured portion that breaks when the airbag expands. There is a core layer of the injection mold, and a sharp projection is formed in advance at a position corresponding to the part to be broken, and the cavity mold of the injection mold has two layers consisting of a front surface layer and a back foam layer. The back surface foam layer of the skin is arranged so as to face the core mold, and after the projection tip of the core mold is pressed against the back surface of the skin by the closing mold of the injection molding die to form a notch in the back foam layer of the skin, Injecting a molten synthetic resin into the injection mold, and forming a core in which slits are formed by the protrusions of the core mold on the back side of the outer skin of a vehicle interior side member integrally having an airbag door portion. Made Method.
破断予定部に沿って表皮の表側から裏側へ屈曲した窪み
部を設けたことを特徴とするエアバッグドア部を一体に
有する車室側部材の製造方法。2. The vehicle interior side integrally having an airbag door portion, according to claim 1, wherein a recessed portion which is bent from a front side of a skin to a back side is provided along a planned breakage portion of the airbag door portion. A method of manufacturing a member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8148347A JPH09300400A (en) | 1996-05-17 | 1996-05-17 | Manufacture of member on side of compartment integrally having air bag door part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8148347A JPH09300400A (en) | 1996-05-17 | 1996-05-17 | Manufacture of member on side of compartment integrally having air bag door part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09300400A true JPH09300400A (en) | 1997-11-25 |
Family
ID=15450738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8148347A Pending JPH09300400A (en) | 1996-05-17 | 1996-05-17 | Manufacture of member on side of compartment integrally having air bag door part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09300400A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6237933B1 (en) | 1998-04-28 | 2001-05-29 | Toyota Jidosha Kabushiki Kaisha | Vehicle interior member having air bag door portion and method for molding the same |
| US6533314B2 (en) | 1999-12-30 | 2003-03-18 | Delphi Technologies, Inc. | Instrument panel with integral hidden door cover and method of manufacture thereof |
| WO2003051664A1 (en) * | 2001-12-18 | 2003-06-26 | Dsm Ip Assets B.V. | Instrument panel comprising a layer of a thermoplastic copolyester elastomer composition |
| JP2010047215A (en) * | 2008-08-25 | 2010-03-04 | Daikyonishikawa Corp | Air bag door and its manufacturing method |
| KR200460103Y1 (en) * | 2009-12-31 | 2012-05-04 | 주식회사 동원테크 | Mold structure for selection cuting of interior part outside in vehicle |
-
1996
- 1996-05-17 JP JP8148347A patent/JPH09300400A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6237933B1 (en) | 1998-04-28 | 2001-05-29 | Toyota Jidosha Kabushiki Kaisha | Vehicle interior member having air bag door portion and method for molding the same |
| US6764633B2 (en) | 1998-04-28 | 2004-07-20 | Toyota Jidosha Kabushiki Kaisha | Method for molding a vehicle interior member having air bag door portion |
| US6533314B2 (en) | 1999-12-30 | 2003-03-18 | Delphi Technologies, Inc. | Instrument panel with integral hidden door cover and method of manufacture thereof |
| WO2003051664A1 (en) * | 2001-12-18 | 2003-06-26 | Dsm Ip Assets B.V. | Instrument panel comprising a layer of a thermoplastic copolyester elastomer composition |
| JP2010047215A (en) * | 2008-08-25 | 2010-03-04 | Daikyonishikawa Corp | Air bag door and its manufacturing method |
| KR200460103Y1 (en) * | 2009-12-31 | 2012-05-04 | 주식회사 동원테크 | Mold structure for selection cuting of interior part outside in vehicle |
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