JP3721680B2 - Gradual change extrusion molding apparatus and control method thereof - Google Patents

Gradual change extrusion molding apparatus and control method thereof Download PDF

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Publication number
JP3721680B2
JP3721680B2 JP34113696A JP34113696A JP3721680B2 JP 3721680 B2 JP3721680 B2 JP 3721680B2 JP 34113696 A JP34113696 A JP 34113696A JP 34113696 A JP34113696 A JP 34113696A JP 3721680 B2 JP3721680 B2 JP 3721680B2
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resin
gradual change
mold
change member
discharge port
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JPH10175246A (en
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垣 健 志 谷
田 兼 広 永
村 浩 久 木
出 義 人 小
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Aisin Corp
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Aisin Seiki Co Ltd
Aisin Corp
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    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92571—Position, e.g. linear or angular
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、徐変部材に樹脂層を形成する徐変押出成形装置に関するものであり、特に、樹脂層を設ける形状が徐々に変化する徐変部材に対し、所定形状に樹脂層を形成するための徐変押出成形装置およびその制御方法に係わる。
【０００２】
【従来の技術】
従来、車両ボディーとドアフレームの間に設けられるルーフドリップモール（図１１参照）は、一定の断面形状のものが用いられていた。しかし、近年ではルーフドリップモールの光沢部分または樹脂層が設けられる異色部分を、徐々に変化させ見栄えを向上させたものが意匠面の向上を目的として次第に要求されてきており、例えば、このモールに樹脂層を設けるが、モールの断面形状は一定として樹脂層だけを徐変させたモールおよびその製造方法が特公平５−６２０８８号公報に開示されている。
【０００３】
一方、ルーフドリップモールの徐変部をつくるために、図１２の（ａ）に示されるように前部および中央部の断面を不変としたモール本体と、後部の異色部分（樹脂部分）のみを徐変したガーニッシュと、シール機能をもたせたリテーナを分割して作り、本体、ガーニッシュ、リテーナをつなぎ合わせて、つなぎ合わせたものを溶接またはカシメ等で組み付け、１つのルーフドリップモールとしているものが、１９９４年７月から販売のカリーナＥＤ（トヨタ自動車株式会社製造）に採用されている。また、（ｂ）に示されるように本体部の後部の光沢部分を徐変し、別体で徐変した異色部分を光沢部分の下側にリテーナと共に溶接により接合しているものが、１９９４年１２月から販売のディアマンテ（三菱自動車株式会社製造）に採用されている。
【０００４】
【本発明が解決しようとする課題】
しかしながら、上記した特公平５−６２０８８号公報のものでは、モールの断面形状が不変で、異色部分のみ樹脂層を徐変するものであり、光沢部分の徐変および樹脂形成層の徐変には対応できないものである。
【０００５】
また、図１２に示される本体とガーニッシュを接合する方法は、ガーニッシュを固定型に射出成形することで光沢部分と異色部分の徐変は可能となるが、本体とガーニッシュの接続部で継ぎ目の線が入り見栄えがよくない。更には、ルーフドリップモールは車両の外側に位置することから風雨にさらされる状態となり、雨の日等には継ぎ目から雨水の進入が起ったりするのでその対策が必要になるし、複数の部材を溶接または接着等によりつなぎ合わせなければならず、製造コストも高くなってしまう。
【０００６】
そこで、継ぎ目をなくし光沢部分および異色部分を一体化したものが考えられるが、一体化したものを作る徐変押出成形装置では、徐変を行うためにモールを固定型に支持した状態で、異色部分となるところに樹脂を吐出させて樹脂層を設けるが、樹脂形成層が変化する徐変部においては、樹脂を吐出するときにモールの裏面で十分に樹脂圧力を受けることができなくなってしまうということが起こり得る。このため、樹脂の圧力を受けたとき、この圧力により裏側にモールが変形してしまい、樹脂形成層において所定形状に樹脂層を成形することができないものとなる。
【０００７】
よって、本発明は上記の問題点に鑑みてなされたものであり、徐変部材の断面形状が変化しても成形時に徐変部材が樹脂圧力によって裏側へ変形してしまうことを防止し、徐変部材に対して所定形状で樹脂層を設けることができる装置を提供することを技術的課題とする。
【０００８】
【課題を解決するための手段】
上記の課題を解決するため講じた技術的手段は、徐変部材を支持する固定型と、該固定型の側に固定されたシャッターと、吐出口を有し前記徐変部材に樹脂を形成する前記徐変部材の樹脂形成層の形状に合わせて前記固定型に対し回転させ前記シャッターと前記吐出口の位置により吐出幅を変化させ前記樹脂形成層の表面に前記樹脂を吐出する回転型と、前記吐出口に対して前記樹脂を供給する押出装置と、前記樹脂が前記吐出口から吐出する際に樹脂圧力を前記徐変部材の裏側で受ける受け型と、該受け型と前記押出装置及び前記回転型を制御する制御装置とを備えた徐変押出成形装置において、前記受け型は、カム面を有する円盤から構成されていることである。
【０００９】
上記の構成により、回転型の吐出口から樹脂が吐出する際に、徐変部材は樹脂の圧力を受けても裏側に受け型があることから、樹脂圧力による裏側への変形が防止される。
【００１０】
受け型をカム面を有した円盤としているので、簡単な構成で裏面へのそりが防止されるものとなっている。
【００１１】
この場合、制御装置により徐変部材の断面形状に合わせて押出装置の樹脂量を変化させ、回転型の回転により樹脂の吐出幅を制御すると共にカム面を回転させるような連動制御を行えば、樹脂が徐変部材の樹脂形成層に所定形状で成形されるものとなる。
【００１４】
【発明の実施の形態】
以下、本発明の実施形態を図面を参照して説明する。ここでは、車両のルーフドリップモール１の成形に適用した場合について説明するがこれに限定されないものである。
【００１５】
図１はルーフドリップモール１の正面図であり、図２は図１のＡ−Ａ断面図、図３はＢ−Ｂ断面図である。図１に示すルーフドリップモール１は、車両の前部と後部のモールが一体で徐変部材（芯材）２に樹脂が形成されたものであり、徐変部材２の樹脂形成層となるくぼみ部２ｄに樹脂４を成形して異色部分とした直線状のものを、ベンダー加工等により３次元的に曲げて加工したものである。
【００１６】
徐変部材２は、ステンレス（ＳＵＳ）等の１枚の金属からロール成形により作られ、断面形状が３次元形状を呈するものである。図１に示されるように徐変部材２には一定断面を有する不変部２ａと断面形状が徐々に変化する徐変部２ｂが設けられると共に、この徐変部材２の形状に合わせて樹脂層３にも不変部３ａと徐変部３ｂが設けられている。樹脂層２ｆは、くぼみ部２ｄに吐出口２３から均一に樹脂４が押出成形されることにより成形されるものである。この場合、樹脂４としては、例えば、塩化ビニル等の熱可塑性樹脂が用いられる。
【００１７】
次に、ルーフドリップモール１の製造方法について、図４を参照して簡単に説明する。最初、ロール状に巻かれた芯材をロール加工し幅方向に切断を行い、徐変部材２を作る。その徐変部材２を図４に示す右矢印方向に駆動ローラで搬送しながら、徐変部材２の表面２ｃのへこみ部２ｄに接着剤塗布装置１０により接着剤を塗布する。この接着剤塗布装置１０は、樹脂を接着する接着剤を染み込ませた接着剤塗布用の治具１１と、接着剤をへこみ部２ｄに圧送するポンプ１２で構成されている。
【００１８】
接着剤が表面上に塗布された徐変部材２は、次に高周波加熱コイル２０により接着表面が加熱されて、接着し易くなった状態になる。そこに、押出装置３２により塩化ビニル樹脂等の樹脂４を押し出し、くぼみ部２ｄ上に樹脂を成形する。つまり、押出装置３２からの樹脂４は、固定型３１の樹脂流路６に圧送されて吐出口２３から吐出し、徐変部材２も樹脂形成層２ｅ上に樹脂層２ｆが成形されることになる。その後、表面２ｃ上に樹脂層２ｆが設けられた徐変部材２は、冷却槽４０により樹脂層２ｆが冷却され凝固され、引取り機５０により引き取られた後、所定の長さで切断され、図示しないベンダー加工装置により直線上の徐変部材２が３次元的にベンダー加工されてルーフドリップモール１が作られる。
【００１９】
次に、図５を参照して本発明の徐変押出成形装置５について説明する。
【００２０】
徐変押出成形装置５は、以下のものから構成されている。つまり、固定型３１の内部には徐変部材２を支持する固定型に固定された固定受け型２４が設けられ、同じく固定型３１の側に固定されたシャッター７とがあり、更に、吐出口２３を有し徐変部材２に樹脂４を形成する徐変部材２の樹脂形成層２ｅの形状に合わせて固定型２４に対し回転させて、シャッター７と吐出口２３の位置関係により樹脂４の吐出幅を変化させ樹脂形成層２ｅの表面に樹脂４を吐出する回転型８と、吐出口２３に対して樹脂４を供給する押出装置３２と、樹脂４が吐出口２３から吐出する際に樹脂圧力を徐変部材２の裏側で受ける受け型１８と、受け型１８と押出装置３２及び回転型８を制御する制御装置１９とから成り立っている。
【００２１】
この場合、徐変部材２は徐変部材２の送り方向に延在する固定型３１に間接的に固定受け型２４を介して支持される。この固定受け型２４は徐変部材２の上下に配設されており、上下の固定受け型２４の間を徐変部材２が支持された状態で搬送される。
【００２２】
徐変部材２の樹脂形成層２ｅに設けられる樹脂４は、押出装置３２により供給される。樹脂は、図５に示されるように押出装置内部の図示しないスクリューにより混練され、押出装置３２からＹ方向、Ｘ方向へと流れた後、円弧状の回転型８の回転中心４１から径方向、周方向内部に設けられた樹脂流路６を流れる。その後、固定型３１内部に設けられた空間１３を回転型８が回転中心４１を中心として摺動する際に吐出口２３とシャッター７との位置関係により形成される吐出幅により、徐変部材２のへこみ部２ｄに向けて吐出口２３から樹脂４が均一に吐出し、徐変部材２の搬送方向の樹脂形成層２ｅのみに固定型３１が配設される位置で樹脂層２ｆが設けられるようになっている。
【００２３】
この場合、回転型８の吐出口２３から樹脂４が吐出するが、回転型８の回転角度θとシャッター７との吐出幅を可変することで、樹脂形成層２ｅの形状に追従してシャッター７に対して回転型８により吐出幅が変化する。つまり、シャッター７と吐出口２３の吐出幅を可変して樹脂４を制限するものであり、制御装置１９により制御されるモータ等の駆動装置１６の出力軸に配設された回転ギヤ１５に回転型８の外周に設けられた図示しないギヤ面が噛合して、回転型８が回転中心４１を中心にして周方向に動くものである。このシャッター７に対しての吐出幅は、光沢部分と異色部分との段部の形状に追従して回転型８が回転するものであり、樹脂形成層２ｅが最大幅のときには図６に示す空間１３の最下位まで回転型８が移動する状態となり、最小幅部のときには回転型８は図６の状態となるものである。
【００２４】
押出装置３２は、内部に図示しないシリンダ孔を有しており、シリンダ孔は回転可能に配設されたスクリュー回転数により樹脂量を変化させることができ、この内部のスクリューは、制御装置１９によりモータ等の駆動装置１６が制御され、駆動装置１６のモータの回転数を変化させることにより樹脂の押出量を変えることができる。
【００２５】
図６に示す受け型１８は、樹脂形成層２ｅに対して押出成形するときに樹脂圧力による変形を防止するものであり、所定形状で樹脂層２ｆを設けることができるように樹脂圧力を受ける徐変部材２の裏側に配設されている。この受け型の形状は、半ボール状の円盤形状を呈し、大幅部１４ａと小幅部１４ｂが連続して設けられたカム面が一体で設けられている（図８参照）。受け型１８の円盤１４は、制御装置１９により制御される駆動モータ２１の駆動により回転動作するものであり、駆動モータ２１の出力軸がシャフト２２を介して円盤１４の回転中心となっている。回転動作を説明すると、図１において徐変部材２が固定型３１を通過する際にＡ−Ａ断面のとき徐変部材２の樹脂形成層２ｅの表面積は小さいので、固定受け型２４と円盤１４の小幅部１４ｂあるいは固定受け型２４のみで押出装置３２からの樹脂材の圧力（樹脂圧力）を受けるようにさせる。一方、Ａ−Ａ断面からＢ−Ｂ断面に変化していく過程（徐変区間）では、徐変部材２が固定型３１を通過し樹脂４が成形されるときには、樹脂圧力により徐変部材２が圧力を受ける側（樹脂形成層の裏側）に変形してしまうために、裏側に受け型１８を配設することで樹脂圧力による変形が防止され、これによって所定形状に樹脂層２ｆが成形されるものとなる。
【００２６】
図１０の（ａ）の従来例に示されるよう徐変部材２の裏側に受け型１８がないと、樹脂を設ける場合に樹脂圧力により徐変部材２が裏側に変形し、所定形状に樹脂層２ｆを成形することができない。このことから、固定受け型２４のみで樹脂圧力を受けることができない部分を（ｂ）の本発明の第１実施形態に示されるようにカム面を有する円盤１４で受けるようにすることで所定形状均一に樹脂層２ｆを成形することが可能となる。
【００２７】
次に、図９を参照して制御装置１９の制御方法について説明する。
【００２８】
制御装置１９は、押出機３２のスクリューの回転による樹脂吐出量、シャッター７と回転型８との吐出口２３の吐出幅を決定する回転型８の回転角度θ、及び受け型１８の円盤１４を連動して制御するものであり、図１のＡ−Ａ断面からＢ−Ｂ断面（断面積が増加していく方向）に向かう徐変区間ではスクリュー回転を徐々に樹脂量を増加させると共に、回転型８の回転角度θも増加させ、受け型１８の円盤１４も徐々に回転させ小幅部１４ｂから大幅部１４ａと変化させる。
【００２９】
一方、Ｂ−Ｂ断面からＡ−Ａ断面（断面積が減少していく方向）に向かう徐変区間では全て減少していくことで所定形状に樹脂層２ｆを成形することが可能になる。
【００３３】
【効果】
本発明によれば、徐変部材を支持する固定型と、固定型の側に固定されたシャッターと、吐出口を有し徐変部材に樹脂を形成する徐変部材の樹脂形成層の形状に合わせて固定型に対し回転させシャッターと前記吐出口の位置により吐出幅を変化させ樹脂形成層の表面に樹脂を吐出する回転型と、吐出口に対して樹脂を供給する押出装置と、樹脂が前記吐出口から吐出する際に樹脂圧力を徐変部材の裏側で受ける受け型と、受け型と前記押出装置及び前記回転型を制御する制御装置とを備えたことにより、徐変部材の樹脂形成層に樹脂を成形することが可能になり、シャッターから樹脂が吐出する際に徐変部材は樹脂の圧力を受けても裏側に受け型があることから樹脂圧力による裏側への変形が防止できるものとなる。
【００３４】
この場合、受け型をカム面を有した円盤としているので、簡単な構成で裏面へのそりが防止でき、制御装置により徐変部材の断面形状に合わせて押出装置の樹脂量を変化させ、シャッターと回転型の回転により樹脂の吐出幅を制御すると共に受け型のカム面を回転させるような連動制御を行えば、樹脂が徐変部材の樹脂形成層に所定形状で形成されるものとなる。
【図面の簡単な説明】
【図１】 本発明の一実施形態におけるルーフドリップモールの平面図である。
【図２】 図１に示すＡ−Ａ断面図である。
【図３】 図１に示すＢ−Ｂ断面図である。
【図４】 本発明の一実施形態におけるルーフドリップモールの製造方法である。
【図５】 本発明の一実施形態における徐変押出成形装置の構成図である。
【図６】 本発明の一実施形態における徐変押出成形装置における樹脂形成部分の拡大図である。
【図７】 図６に示すＣ−Ｃ断面図である。
【図８】 本発明の一実施形態における受け型を円盤とした場合の円盤の正面図および側面図である。
【図９】 本発明の一実施形態における制御概念図である。
【図１０】従来例と本発明との構成の比較図である。
【図１１】車両におけるルーフドリップモールの位置を示した図である。
【図１２】従来のルーフドリップモールの構成を示した図である。
【符号の説明】
１ ルーフドリップモール
２ 徐変部材
６ 樹脂流路
７ シャッター
８ 回転型
１４ 円盤（受け型）
１４ａ 大幅部（カム面）
１４ｂ 小幅部（カム面）
１８ 受け型
１９ 制御装置
２４ 固定受け型
３１ 固定型
３２ 押出装置
４０ 冷却槽 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gradual change extrusion molding apparatus for forming a resin layer on a gradual change member, and in particular, to form a resin layer in a predetermined shape with respect to a gradual change member in which the shape of the resin layer is gradually changed. The present invention relates to a gradual change extrusion molding apparatus and a control method thereof.
[0002]
[Prior art]
Conventionally, the roof drip molding (see FIG. 11) provided between the vehicle body and the door frame has a constant cross-sectional shape. In recent years, however, the glossy part of the roof drip molding or the different color part on which the resin layer is provided has been gradually required to improve the appearance by gradually changing the appearance. Japanese Patent Publication No. 5-62088 discloses a molding and a manufacturing method thereof in which a resin layer is provided, but the sectional shape of the molding is constant and only the resin layer is gradually changed.
[0003]
On the other hand, in order to create a gradually changing portion of the roof drip molding, only the molding main body having the front and center sections unchanged as shown in FIG. A garnish that has been gradually changed and a retainer that has a sealing function are made separately. It has been adopted by Carina ED (manufactured by Toyota Motor Corporation) sold since July 1994. Also, as shown in (b), the glossy part of the rear part of the main body is gradually changed, and a differently colored part that has been gradually changed by another body is joined to the lower side of the glossy part by welding together with a retainer. It has been adopted by Diamante (manufactured by Mitsubishi Motors) sold since December.
[0004]
[Problems to be solved by the present invention]
However, in the above-mentioned Japanese Patent Publication No. 5-62088, the cross-sectional shape of the molding is not changed, and the resin layer is gradually changed only in the different color part. For the gradual change of the glossy part and the gradual change of the resin forming layer, It cannot be handled.
[0005]
In addition, the method of joining the main body and the garnish shown in FIG. 12 can gradually change the glossy part and the different color part by injection molding the garnish into a fixed mold. Is not good looking. Furthermore, since the roof drip molding is located outside the vehicle, it is exposed to wind and rain, and on rainy days and the like, rainwater enters from the seam, so it is necessary to take countermeasures. Must be joined together by welding or bonding, resulting in high manufacturing costs.
[0006]
Therefore, it is conceivable to integrate the glossy part and the different color part by eliminating the seam. However, in the gradual change extrusion molding apparatus that makes the integrated part, the color is different while the molding is supported on the fixed mold for gradual change. A resin layer is provided by discharging resin at a portion, but at a gradually changing portion where the resin forming layer changes, it becomes impossible to receive sufficient resin pressure on the back surface of the molding when discharging the resin. That can happen. For this reason, when receiving the pressure of the resin, the molding deforms on the back side due to the pressure, and the resin layer cannot be formed into a predetermined shape in the resin forming layer.
[0007]
Therefore, the present invention has been made in view of the above problems, and even if the cross-sectional shape of the gradual change member changes, the gradual change member is prevented from being deformed to the back side by the resin pressure during molding. It is a technical object to provide an apparatus that can provide a resin layer in a predetermined shape with respect to a deformable member.
[0008]
[Means for Solving the Problems]
The technical means taken in order to solve the above-mentioned problems include a fixed mold for supporting the gradual change member, a shutter fixed to the fixed mold side, a discharge port, and forming resin on the gradual change member. A rotating mold that rotates relative to the fixed mold according to the shape of the resin forming layer of the gradual change member, changes the discharge width according to the position of the shutter and the discharge port, and discharges the resin onto the surface of the resin forming layer; An extrusion device that supplies the resin to the discharge port; a receiving mold that receives a resin pressure on the back side of the gradual change member when the resin is discharged from the discharge port; the receiving mold and the extrusion device; In the gradual change extrusion molding apparatus provided with a control device for controlling the rotary mold, the receiving mold is constituted by a disk having a cam surface.
[0009]
With the above configuration, when the resin is discharged from the rotary discharge port, the gradual change member has a receiving mold on the back side even when the pressure of the resin is received, so that deformation to the back side due to the resin pressure is prevented.
[0010]
Since the accepted types are a disk having a cam surface, warp of the back surface with a simple configuration has become what is prevented.
[0011]
In this case, if the control device changes the resin amount of the extrusion device in accordance with the cross-sectional shape of the gradual change member and controls the discharge width of the resin by rotation of the rotary mold and performs interlocking control such as rotating the cam surface, The resin is molded in a predetermined shape on the resin forming layer of the gradually changing member.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, the case where it is applied to the molding of the roof drip molding 1 of a vehicle will be described, but the present invention is not limited to this.
[0015]
FIG. 1 is a front view of the roof drip molding 1, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB. A roof drip molding 1 shown in FIG. 1 is formed by integrating a front molding and a rear molding of a vehicle with a resin formed on a gradual change member (core material) 2 and forming a resin forming layer of the gradual change member 2. A linear shape formed by molding the resin 4 on the portion 2d and having a different color portion is three-dimensionally bent by a bender process or the like.
[0016]
The gradual change member 2 is made by roll forming from one metal such as stainless steel (SUS) and has a three-dimensional cross-sectional shape. As shown in FIG. 1, the gradual change member 2 is provided with an invariable portion 2 a having a constant cross section and a gradual change portion 2 b with a gradually changing cross-sectional shape, and the resin layer 3 according to the shape of the gradual change member 2. In addition, an invariant portion 3a and a gradually changing portion 3b are provided. The resin layer 2f is formed by uniformly extruding the resin 4 from the discharge port 23 into the recessed portion 2d. In this case, as the resin 4, for example, a thermoplastic resin such as vinyl chloride is used.
[0017]
Next, a method for manufacturing the roof drip molding 1 will be briefly described with reference to FIG. Initially, the core material wound in roll shape is roll-processed and cut | disconnected in the width direction, and the gradual change member 2 is made. While the gradual change member 2 is conveyed by the driving roller in the direction of the right arrow shown in FIG. 4, an adhesive is applied to the dent portion 2 d of the surface 2 c of the gradual change member 2 by the adhesive application device 10. The adhesive application device 10 includes an adhesive application jig 11 infiltrated with an adhesive for adhering a resin, and a pump 12 that pumps the adhesive to the dent portion 2d.
[0018]
The gradually changing member 2 having the adhesive applied on the surface is then heated by the high-frequency heating coil 20 so that the adhesive surface is easily bonded. There, the resin 4 such as vinyl chloride resin is extruded by the extrusion device 32, and the resin is molded on the recessed portion 2d. That is, the resin 4 from the extrusion device 32 is pumped to the resin flow path 6 of the fixed mold 31 and discharged from the discharge port 23, and the gradual change member 2 is also molded with the resin layer 2f on the resin forming layer 2e. Become. Thereafter, the gradual change member 2 provided with the resin layer 2f on the surface 2c is cooled and solidified by the cooling tank 40 and then taken by the take-up machine 50, and then cut by a predetermined length. The gradual change member 2 on the straight line is three-dimensionally bendered by a bender processing apparatus (not shown) to produce the roof drip molding 1.
[0019]
Next, the gradual change extrusion molding apparatus 5 of the present invention will be described with reference to FIG.
[0020]
The gradually changing extrusion molding apparatus 5 is composed of the following. That is, a fixed receiving mold 24 fixed to the fixed mold that supports the gradual change member 2 is provided inside the fixed mold 31, and the shutter 7 is also fixed to the fixed mold 31. , And the resin 4 is formed on the gradual change member 2. The resin formation layer 2 e of the gradual change member 2 is rotated with respect to the fixed mold 24 in accordance with the shape of the resin formation layer 2 e. A rotary mold 8 that changes the discharge width to discharge the resin 4 onto the surface of the resin forming layer 2e, an extrusion device 32 that supplies the resin 4 to the discharge port 23, and a resin when the resin 4 is discharged from the discharge port 23 It comprises a receiving mold 18 that receives pressure on the back side of the gradual change member 2, and a control device 19 that controls the receiving mold 18, the extrusion device 32, and the rotary die 8.
[0021]
In this case, the gradual change member 2 is indirectly supported by the fixed die 31 extending in the feeding direction of the gradual change member 2 via the fixed receiving die 24. The fixed receiving mold 24 is disposed above and below the gradual change member 2 and is conveyed between the upper and lower fixed receiving molds 24 while the gradual change member 2 is supported.
[0022]
The resin 4 provided on the resin forming layer 2 e of the gradual change member 2 is supplied by the extrusion device 32. As shown in FIG. 5, the resin is kneaded by a screw (not shown) inside the extrusion device and flows from the extrusion device 32 in the Y direction and the X direction, and then from the rotation center 41 of the arcuate rotary mold 8 in the radial direction. It flows through the resin flow path 6 provided inside in the circumferential direction. Thereafter, when the rotary mold 8 slides around the rotation center 41 in the space 13 provided in the fixed mold 31, the gradual change member 2 is formed by the discharge width formed by the positional relationship between the discharge port 23 and the shutter 7. The resin 4 is uniformly discharged from the discharge port 23 toward the indented portion 2d, and the resin layer 2f is provided at a position where the fixed mold 31 is disposed only on the resin forming layer 2e in the transport direction of the gradual change member 2. It has become.
[0023]
In this case, the resin 4 is discharged from the discharge port 23 of the rotary mold 8, but by changing the rotation angle θ of the rotary mold 8 and the discharge width of the shutter 7, the shutter 7 follows the shape of the resin forming layer 2e. On the other hand, the discharge width is changed by the rotary die 8. In other words, the resin 4 is limited by changing the discharge width of the shutter 7 and the discharge port 23, and the resin is rotated by the rotary gear 15 disposed on the output shaft of the drive device 16 such as a motor controlled by the control device 19. A gear surface (not shown) provided on the outer periphery of the mold 8 meshes, and the rotary mold 8 moves in the circumferential direction around the rotation center 41. The discharge width for the shutter 7 is such that the rotary mold 8 rotates following the shape of the stepped portion of the glossy portion and the different color portion. When the resin forming layer 2e has the maximum width, the space shown in FIG. The rotary mold 8 is moved to the lowest position of 13, and the rotary mold 8 is in the state shown in FIG.
[0024]
The extrusion device 32 has a cylinder hole (not shown) inside, and the cylinder hole can change the amount of resin according to the rotational speed of a screw rotatably arranged. The drive device 16 such as a motor is controlled, and the extrusion amount of the resin can be changed by changing the rotation speed of the motor of the drive device 16.
[0025]
The receiving mold 18 shown in FIG. 6 prevents deformation due to the resin pressure when extrusion molding is performed on the resin forming layer 2e. The receiving mold 18 gradually receives the resin pressure so that the resin layer 2f can be provided in a predetermined shape. It is arranged on the back side of the deformable member 2. The shape of the receiving mold is a semi-ball shape, and a cam surface provided with a continuous large portion 14a and a small width portion 14b is provided integrally (see FIG. 8). The disk 14 of the receiving mold 18 is rotated by the drive of a drive motor 21 controlled by the control device 19, and the output shaft of the drive motor 21 is the center of rotation of the disk 14 via the shaft 22. Referring to FIG. 1, when the gradual change member 2 passes through the fixed mold 31, the surface area of the resin forming layer 2e of the gradual change member 2 is small when the gradual change member 2 passes through the fixed mold 31. The pressure of the resin material (resin pressure) from the extrusion device 32 is received only by the narrow width portion 14b or the fixed receiving die 24. On the other hand, in the process of changing from the AA cross section to the BB cross section (gradual change section), when the gradual change member 2 passes through the fixed mold 31 and the resin 4 is molded, the gradual change member 2 is caused by the resin pressure. Is deformed to the pressure receiving side (the back side of the resin forming layer), the deformation due to the resin pressure is prevented by disposing the receiving mold 18 on the back side, whereby the resin layer 2f is formed into a predetermined shape. Will be.
[0026]
If there is no receiving mold 18 on the back side of the gradual change member 2 as shown in the conventional example of FIG. 10A, the gradual change member 2 is deformed to the back side by the resin pressure when the resin is provided, and the resin layer has a predetermined shape. 2f cannot be molded. For this reason, a portion that cannot receive resin pressure only by the fixed receiving mold 24 is received by a disk 14 having a cam surface as shown in the first embodiment of the present invention of (b), thereby having a predetermined shape. The resin layer 2f can be uniformly formed.
[0027]
Next, a control method of the control device 19 will be described with reference to FIG.
[0028]
The control device 19 controls the resin discharge amount due to the rotation of the screw of the extruder 32, the rotation angle θ of the rotary mold 8 that determines the discharge width of the discharge port 23 between the shutter 7 and the rotary mold 8, and the disk 14 of the receiving mold 18. In the gradual change section from the AA cross section in FIG. 1 to the BB cross section (in the direction in which the cross sectional area increases), the screw rotation is gradually increased while the resin amount is gradually increased. The rotational angle θ of the mold 8 is also increased, and the disk 14 of the receiving mold 18 is gradually rotated to change from the narrow part 14b to the large part 14a.
[0029]
On the other hand, the resin layer 2f can be formed into a predetermined shape by decreasing all the gradual change sections from the BB cross section toward the AA cross section (direction in which the cross-sectional area decreases).
[0033]
【effect】
According to the present invention, the shape of the resin forming layer of the gradual change member that has the fixed mold that supports the gradual change member, the shutter fixed to the fixed mold side, and the discharge port that forms the resin on the gradual change member. In addition, a rotating mold that rotates with respect to the fixed mold and changes the discharge width according to the position of the shutter and the discharge port to discharge the resin onto the surface of the resin forming layer, an extrusion device that supplies the resin to the discharge port, and a resin By providing a receiving mold that receives resin pressure on the back side of the gradually changing member when discharging from the discharge port, and a control device that controls the receiving mold, the extrusion device, and the rotating die, resin formation of the gradually changing member Resin can be molded into the layer, and when the resin is discharged from the shutter, the gradual change member has a receiving mold on the back side even if it receives the pressure of the resin, so that deformation to the back side due to the resin pressure can be prevented It becomes.
[0034]
In this case, since the receiving die is a disk having a cam surface, it can prevent warpage of the rear surface with a simple structure, changing the amount of resin extruder in accordance with the sectional shape of the gradual change member by the control device The resin is formed in a predetermined shape on the resin forming layer of the gradual change member by controlling the discharge width of the resin by rotating the shutter and the rotary mold and performing the interlock control to rotate the cam surface of the receiving mold. It becomes.
[Brief description of the drawings]
FIG. 1 is a plan view of a roof drip molding in one embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA shown in FIG.
3 is a cross-sectional view taken along the line BB shown in FIG.
FIG. 4 is a method for manufacturing a roof drip molding in one embodiment of the present invention.
FIG. 5 is a configuration diagram of a gradual change extrusion molding apparatus according to an embodiment of the present invention.
FIG. 6 is an enlarged view of a resin forming portion in the gradual change extrusion molding apparatus in one embodiment of the present invention.
7 is a cross-sectional view taken along the line CC shown in FIG.
FIGS. 8A and 8B are a front view and a side view of a disk when the receiving mold in one embodiment of the present invention is a disk. FIGS.
FIG. 9 is a conceptual diagram of control in one embodiment of the present invention.
FIG. 10 is a comparative view of the configuration of a conventional example and the present invention.
FIG. 11 is a diagram showing a position of a roof drip molding in a vehicle.
FIG. 12 is a diagram showing a configuration of a conventional roof drip molding.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Roof drip molding 2 Gradual change member 6 Resin flow path 7 Shutter 8 Rotating type 14 Disc (receiving type)
14a Large part (cam surface)
14b Narrow part (cam surface)
18 receiving mold 19 control device 24 fixed receiving mold 31 fixed mold 32 extrusion device 40 cooling tank

Claims (2)

徐変部材を支持する固定型と、該固定型の側に固定されたシャッターと、吐出口を有し前記徐変部材の樹脂形成層の形状に合わせて前記固定型に対し回転させ前記シャッターと前記吐出口の位置により制限される吐出幅を変化させ前記樹脂形成層の表面に前記樹脂を吐出する回転型と、前記吐出口に対して前記樹脂を供給する押出装置と、前記樹脂が前記吐出口から吐出する際に樹脂圧力を前記徐変部材の裏側で受ける受け型と、該受け型と前記押出装置及び前記回転型を制御する制御装置とを備えた徐変押出成形装置において、
前記受け型は、カム面を有する円盤であることを特徴とする徐変押出成形装置。A fixed mold for supporting the gradual change member, a shutter fixed to the fixed mold side, and a discharge port having a discharge port and rotated with respect to the fixed mold in accordance with the shape of the resin forming layer of the gradual change member; A rotary mold that changes the discharge width limited by the position of the discharge port and discharges the resin onto the surface of the resin forming layer, an extrusion device that supplies the resin to the discharge port, and the resin that discharges the resin. In a gradual change extrusion molding apparatus comprising a receiving mold that receives a resin pressure on the back side of the grading member when discharging from an outlet, and a control device that controls the receiving mold, the extrusion apparatus, and the rotation mold ,
The gradual change extrusion molding apparatus characterized in that the receiving mold is a disk having a cam surface . 前記制御装置は、前記樹脂形成層の断面形状に合わせて前記押出装置の樹脂量を変化させ、前記回転型の回転により前記吐出幅を制限すると共に前記カム面を回転させ連動制御を行うことを特徴とする請求項１に記載の徐変押出成形装置の制御方法。The control device changes the resin amount of the extrusion device in accordance with the cross-sectional shape of the resin forming layer, restricts the discharge width by rotation of the rotary mold, and rotates the cam surface to perform interlock control. The method of controlling a gradual change extrusion molding apparatus according to claim 1 , wherein
JP34113696A 1996-12-20 1996-12-20 Gradual change extrusion molding apparatus and control method thereof Expired - Fee Related JP3721680B2 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
JP34113696A JP3721680B2 (en) 1996-12-20 1996-12-20 Gradual change extrusion molding apparatus and control method thereof

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