JP3326200B2 - Method of forming structural part having hollow pipe-shaped part - Google Patents

Method of forming structural part having hollow pipe-shaped part

Info

Publication number
JP3326200B2
JP3326200B2 JP17555092A JP17555092A JP3326200B2 JP 3326200 B2 JP3326200 B2 JP 3326200B2 JP 17555092 A JP17555092 A JP 17555092A JP 17555092 A JP17555092 A JP 17555092A JP 3326200 B2 JP3326200 B2 JP 3326200B2
Authority
JP
Japan
Prior art keywords
hollow pipe
thermoplastic resin
substrate
forming
mold cavity
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.)
Expired - Lifetime
Application number
JP17555092A
Other languages
Japanese (ja)
Other versions
JPH0615759A (en
Inventor
邦夫 山崎
憲治 河野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Engineering Plastics Corp
Original Assignee
Mitsubishi Engineering Plastics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Engineering Plastics Corp filed Critical Mitsubishi Engineering Plastics Corp
Priority to JP17555092A priority Critical patent/JP3326200B2/en
Publication of JPH0615759A publication Critical patent/JPH0615759A/en
Application granted granted Critical
Publication of JP3326200B2 publication Critical patent/JP3326200B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • 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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B29C45/14344—Moulding in or through a hole in the article, e.g. outsert moulding

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、基板部分と連続した中
空パイプ状部分とから成る構造部品において、該基板部
分が樹脂若しくは金属から成り、連続した中空パイプ状
部分が熱可塑性樹脂より成る構造部品の成形方法に関す
る。The present invention relates, in a structural part consisting of a continuous hollow pipe-shaped portion and a substrate portion, said substrate portion
Min is made of resin or metal, to the molding method of the structural parts continuous hollow pipe-like portion is made of a thermoplastic resin.

【０００２】基板部分と連続した中空パイプ状部分とか
ら成る構造部品は、例えば放熱または加熱のために中空
パイプ状部分内に温度調節された流体（液体もしくは気
体）を通したり、該連続した中空パイプ状部分に電線を
通すなど種々の分野に使用することができる。[0002] Toka continuous hollow pipe-like portion between the base plate portion
Hollow For et consisting structural parts, for example the heat radiation or heat
The present invention can be used in various fields such as passing a temperature-controlled fluid (liquid or gas) through a pipe-shaped portion or passing an electric wire through the continuous hollow pipe-shaped portion.

【０００３】[0003]

【従来の技術】基板部分と連続した中空パイプ状部分か
ら成る構造部品を成形する従来技術では以下に記載の問
題点を有していた。2. Description of the Related Art The prior art for forming a structural part consisting of a hollow pipe-shaped portion continuous with a substrate portion has the following problems.

【０００４】 基板部分に金属パイプを折り曲げ加工
して取り付けた構造部品を作製する際、金属パイプの折
り曲げ加工が困難であったり、折り曲げた金属パイプを
基板部分に溶接する場合、熱歪みが生ずる等の種々の加
工上の困難を伴う場合がある。[0004] When manufacturing the processed and structural parts attached bending a metal pipe in the substrate portion, or is difficult bending a metal pipe, when welding bent metal pipe substrate portion, the heat distortion occurs like May be accompanied by various processing difficulties.

【０００５】 従来の射出成形法にて、基板部分と中
空パイプ状部分とから成る構造部品を作製する場合、通
常は型開き方向にピンを立てたり、複雑なスライドピン
機構を金型内に設置する必要があった。このため、中空
パイプ状部分の形状に制約があり、自由な製品設計がで
きず、他の板材や箱材等といった基板部分と一体化した
形状のものは少なかった。In the conventional injection molding method, the substrate portion and the middle
When fabricating a structural part composed of an empty pipe-shaped part, it is usually necessary to raise a pin in the mold opening direction or to install a complicated slide pin mechanism in the mold. For this reason, the shape of the hollow pipe- shaped portion is limited, and it is not possible to freely design a product, and there are few shapes that are integrated with the substrate portion such as another plate material or box material.

【０００６】 最近注目をあびているガスインジェク
ション法による成形法にて基板部分と中空パイプ状部分
とから成る構造部品を同時に成形しようとする場合、例
えば金型キャビティ内に溶融樹脂を充填した後、ひけ部
分に対して加圧ガス体を注入する方法では、通常、金型
キャビティ内にガスの通路となるガスチャンネルを設け
て成形を行うが、この場合、ガスチャンネル内の溶融樹
脂を押出しながら加圧ガス体が溶融樹脂内を伸びていく
ため、ガスチャンネルの末端部では、押し出し切れない
樹脂がガスチャンネル内に残り、充分な中空パイプ状部
分が形成できない。[0006] After filling the case, the molten resin, for example, a mold cavity to be molded simultaneously a structural part consisting of a base plate portion and a hollow pipe-like portion Te in molding by recent attention attracted by and gas injection method, in the method of injecting a pressurized gas member relative shrinkage portion, usually perform molding by providing a gas channel for passage of the gas into the mold cavity, in this case, while extruding the molten resin in the gas channel pressurized Since the pressurized gas body extends in the molten resin, the resin that cannot be extruded remains in the gas channel at the end of the gas channel, and a sufficient hollow pipe- shaped portion is formed.
Minutes cannot be formed .

【０００７】 金型キャビティ内に複数のガスチャン
ネルを平行設置した場合、製品肉厚が部分的に厚かった
りすると一方のガスチャンネルから加圧ガス体がはみ出
し、となりのガスチャンネルへ入り込んだりする。そう
すると、となりのガスチャンネル内には樹脂が残こり、
このため、該基板部分と連続した中空パイプ状部分を有
した構造部品を作製するのは困難である。When a plurality of gas channels are installed in parallel in a mold cavity, if the thickness of a product is partially increased, a pressurized gas body protrudes from one gas channel and enters a neighboring gas channel. Then, resin will be left in the next gas channel,
For this reason, it is difficult to produce a structural component having a hollow pipe-shaped portion continuous with the substrate portion.

【０００８】 ガスインジェクション法による成形法
で、金型キャビティ内を溶融樹脂で充填しないうちに加
圧ガス体を注入する方法を用いて、基板部分と中空パイ
プ状部分を有する構造部品を成形した場合、中空パイプ
状部分の加圧ガス体の押出し樹脂のみでは、基板部分が
未充填となりやすい。[0008] In molding method by gas injection method, a method of injecting pressurized <br/> pressure gas body in the mold Cavity I in less filled with molten resin, the substrate portion and the hollow pie <br/> flop If molding a structural part to have a Jo portion, only with the extruded resin of the pressurized gas of the hollow pipe-like portion, the substrate portion tends to become unfilled.

【０００９】[0009]

【発明が解決しようとする課題】本発明の目的は、基板
部分と中空パイプ状部分とから成る構造部品において、
基板部分に自由に連続した中空パイプ状部分を配置し、
また、中空パイプ状部分の長手方向形状の自由度をひろ
げ、中空パイプ状部分の折曲げ部の管内径を充分にとる
製造方法と、基板部分と中空パイプ状部分の材質差によ
る線膨脹率の違いによる反りを防止する方法を提供する
ことにある。An object of the present invention is to provide a, in structural parts consisting of a base plate portion and a hollow pipe-like portion,
Place the empty pipes shaped portion in freely continuous substrate portion,
Further, spread freedom of longitudinal shape of a hollow pipe-like portion, a manufacturing method taking a bent portion of the tube inner diameter of the hollow pipe-like portion sufficiently, linear expansion rate due to the material difference in board portion and a hollow pipe-like portion To provide a method for preventing warpage due to differences in

【００１０】[0010]

【課題を解決するための手段】本発明者らは、上記課題
を解決するため鋭意検討した結果、予め形成した基板部
分上のパイプ形成部分、もしくは、第１段として射出成
形された基板部分上のパイプ形成部分に、溶融した熱可
塑性樹脂を金型キャビティ内に必要量射出後、加圧ガス
体を注入して中空構造物を得ることを利用して、基板部
分上または複数の基板部分の間に各々独立した中空パイ
プ状部分を１箇所以上配置することが可能なことを見い
出し、本発明を完成させた。The present inventors have SUMMARY OF THE INVENTION As a result of extensive investigations to solve the above problems, a pipe forming portion on the substrate portion which is preformed, or, on the substrate portion which is injection molded as a first stage After injecting a required amount of molten thermoplastic resin into the mold cavity, forming a hollow structure by injecting a pressurized gas body into the pipe forming part, It has been found that one or more independent hollow pipe-shaped portions can be arranged between them, and the present invention has been completed.

【００１１】本発明の第１の態様に係る中空パイプ状部
分を有する構造部品の成形方法は、射出成形機を使用し
て、熱可塑性樹脂から成る中空パイプ状部分と、樹脂若
しくは金属から成る基板部分とから構成される構造部品
を成形する方法であって、 （Ａ）該基板部分を予め射出成形機の金型キャビティ内
に装着する工程と、 （Ｂ）溶融熱可塑性樹脂を、該金型キャビティ内に必要
量、射出する工程と 、（Ｃ）該中空パイプ状部分を構成する溶融熱可塑性樹脂
の 部分に加圧ガス体を注入して、以て、該基板部分上に
中空パイプ状部分を形成する工程と、 （Ｄ）該基板部分上に中空パイプ状部分が形成された構
造部品を金型キャビティから取り出した後、中空パイプ
状部分の両端を切断する工程、から成ることを特徴とす
る。 [0011] A hollow pipe-like portion according to a first embodiment of the present invention .
Method of forming structural component having a minute, using an injection molding machine, a hollow pipe-like portion made of a thermoplastic resin, resin young
Is properly a method of forming a structural part consisting of a substrate portion made of a metal, a step of mounting in (A) the substrate portion in advance injection molding machine mold cavity, (B) molten thermoplastic Resin is required in the mold cavity
The amount, a step of injecting the molten thermoplastic resin constituting the (C) the hollow pipe-like portion
Portion by injecting pressurized gas of, following Te, forming a hollow pipe-like portion on the substrate portion, (D) configuration of a hollow pipe-like portion on the substrate on portion is formed
After removing the component from the mold cavity, the hollow pipe
Cutting both ends of the shaped part.
You.

【００１２】本発明の第２の態様に係る中空パイプ状部
分を有する構造部品の成形方法は、射出成形機を使用し
て、熱可塑性樹脂から成る中空パイプ状部分と、該熱可
塑性樹脂と同一若しくは異種の熱可塑性樹脂から成る基
板部分とから構成される構造部品を成形する方法であっ
て、 （Ａ）金型キャビティの基板部分を構成する部分に溶融
熱可塑性樹脂を射出して基板部分を形成する工程と、 （Ｂ）溶融熱可塑性樹脂を、金型キャビティの中空パイ
プ状部分を形成すべき部分に必要量、射出する工程と、 （Ｃ）工程（Ｂ）において射出された溶融熱可塑性樹脂
内に加圧ガス体を注入して、以て、該基板部分上に中空
パイプ状部分を形成する工程と、 （Ｄ）該基板部分上に中空パイプ状部分が形成された構
造部品を金型キャビティから取り出した後、中空パイプ
状部分の両端を切断する工程、 から成ることを特徴とす
る。 [0012] A hollow pipe-like portion according to a second aspect of the present invention.
Method of forming structural component having a minute, using an injection molding machine, a hollow pipe-like portion made of thermoplastic resin, based <br/> plate portion made of the thermoplastic resin and the same or different thermoplastic resin This is a method of forming a structural part composed of
Te, melted portions constituting the substrate portion of (A) a mold cavity
( B) a step of injecting a thermoplastic resin to form a substrate portion;
A step of injecting a necessary amount into a portion where a loop-shaped portion is to be formed; and (C) a molten thermoplastic resin injected in the step (B).
A pressurized gas body is injected into the
Forming a pipe-shaped portion; and (D) forming a hollow pipe-shaped portion on the substrate portion.
After removing the component from the mold cavity, the hollow pipe
Cutting both ends of the shaped part .
You.

【００１３】本発明の第１の態様若しくは第２の態様に
係る中空パイプ状部分を有する構造部品の成形方法（以
下、これらを総称して、単に、本発明と呼ぶ場合があ
る）において、中空パイプ状部分を構成する熱可塑性樹
脂として、通常の熱可塑性樹脂、即ち、ポリオレフィン
樹脂、ポリスチレン樹脂、ＡＢＳ樹脂、ＡＳ樹脂、ＰＶ
Ｃ樹脂、メタアクリル樹脂、含フッ素樹脂等で例示され
る汎用の熱可塑性樹脂はもとより、ナイロン樹脂、飽和
ポリエステル樹脂、ポリカーボネート樹脂、ポリアクリ
レート樹脂、ポリアセタール樹脂、ポリスルホン樹脂、
変性ポリフェニレンエーテル樹脂等で例示される、所謂
エンジニアリングプラスチックスを使用することができ
る。 According to the first or second aspect of the present invention,
A method of forming a structural component having such a hollow pipe-like portion (hereinafter referred to as a method
Hereinafter, these may be collectively referred to simply as the present invention.
) , As the thermoplastic resin constituting the hollow pipe-shaped portion, a common thermoplastic resin , that is, polyolefin resin, polystyrene resin, ABS resin, AS resin, PV
C resins, methacrylic resins, general-purpose thermoplastic resins exemplified by fluorine-containing resins, as well as nylon resins, saturated polyester resins, polycarbonate resins, polyacrylate resins, polyacetal resins, polysulfone resins,
So- called engineering plastics exemplified by modified polyphenylene ether resin and the like can be used.

【００１４】本発明の第１の態様に係る中空パイプ状部
分を有する構造部品の成形方法において、基板部分を構
成する金属として、鉄、銅、アルミニウム、およびステ
ンレススチールを例示することができ、又、基板部分を
構成する樹脂として、前記中空パイプ状部分を構成する
熱可塑性樹脂の他、フェノール樹脂、不飽和ポリエステ
ル樹脂、メラミン樹脂等の熱硬化性樹脂を使用すること
ができる。[0014] A hollow pipe-like portion according to a first embodiment of the present invention.
In the method of forming a structural part having a portion, as the metal constituting the substrate portion, iron, copper, aluminum, and stainless steel can be exemplified, and as the resin constituting the substrate portion, the hollow pipe-shaped portion is used. In addition to the constituent thermoplastic resins, thermosetting resins such as phenol resins, unsaturated polyester resins, and melamine resins can be used.

【００１５】又、本発明の第２の態様に係る中空パイプ
状部分を有する構造部品の成形方法において、基板部分
を構成する樹脂として、前記中空パイプ状部分を構成す
る熱可塑性樹脂が例示できる。基板部分と中空パイプ状
部分に使用する熱可塑性樹脂は同種であっても異種であ
ってもよいが、異種の場合、両熱可塑性樹脂が溶着する
ものを選択することが好ましい。A hollow pipe according to a second embodiment of the present invention
In the molding process of the structural component with Jo portion, as the resin constituting the substrate portion, <br/> Ru thermoplastic resin to constitute the hollow pipe-like portion may be exemplified. Substrate and hollow pipe
The thermoplastic resins used for the portions may be the same or different, but in the case of different types, it is preferable to select one in which both thermoplastic resins are welded.

【００１６】本発明の第１の態様に係る中空パイプ状部
分を有する構造部品の成形方法の好ましい成形方法を以
下に詳述する。[0016] A hollow pipe-like portion according to a first embodiment of the present invention.
The preferred molding method for the structural part having a component will be described in detail below.

【００１７】基板部分を金型キャビティ内に装着したと
き、金型キャビティ内の中空パイプ状部分を形成する部
分が一連の流路となるように金型キャビティを設計する
必要がある。この場合、一連の流路の幅および高さが必
要とされる中空パイプ状部分の外側形状となるように、
また、中空パイプ状部分の長手方向の端部は、後加工と
して行われる機械加工と中空部確保のため、必要寸法よ
り１０ｍｍ以上は長くとるように、固定側金型キャビテ
ィブロックに彫り込むのが望ましい。ただし、この中空
パイプ状部分は型開き方向に対してスムースに抜ける形
状でなければならない。また、樹脂ゲートは、この一連
の流路の端部に配置され、且つ、加圧ガス体が注入され
るガスゲートも同じ流路の同じ側の端部に設置される。[0017] and the substrate portion is attached to the mold Cavity I
Come, it is necessary to design the mold Cavity I as part <br/> min to form a hollow pipe-like portion of the mold Cavity I is a series of flow paths. In this case, so that the width and height of the series of flow paths becomes the outer shape of the required hollow pipe-shaped portion ,
In addition , the end of the hollow pipe-shaped portion in the longitudinal direction should be at least 10 mm longer than the required dimension in order to secure the hollow portion by machining performed as a post-process.
It is desirable to engrave on the I block. However, this hollow
The pipe-shaped part must be shaped so that it can be pulled out smoothly in the mold opening direction. The resin gate is disposed at the end of the series of flow paths , and the gas gate into which the pressurized gas is injected is also disposed at the same side end of the same flow path.

【００１８】金型内に装着する基板部分が金属の場合、
または、樹脂の場合でも中空パイプ状部分に用いる熱可
塑性樹脂との接着性の悪い樹脂である場合は、中空パイ
プ状部分との接合箇所に応じて、基板部分上または側面
にアンダーカット処理を行うか、または、砂や紙やす
り、薬品、電極等で接合面に傷をつけて荒い面にしてお
くか、あるいは、エポキシ樹脂等の接着剤を塗布してお
く等の前処理を施しておく必要がある。[0018] When board part you mounted in a mold of metal,
Or, if an adhesive having poor resin with the thermoplastic resin used in the hollow pipe-like portion even when the resin is in accordance with the joint between the hollow pie <br/> looped portion, or on the side substrate portion whether to undercut process, or sand or sandpaper, chemicals, or keep the rough surface and damage the joint surface with the electrode or the like, or pretreatment such as keep applying an adhesive such as an epoxy resin Must be applied.

【００１９】また、基板部分と中空パイプ状部分との材
質差による線膨脹率の違いにより、構造部品に反りが発
生する虞のある場合は、図１に例示するように、基板部
分と中空パイプ状部分のあわせまたはつなぎ面に、０．
０１〜１０ｍｍ程度の間隙幅をとり、且つ、図２に示す
ような嵌合状態（アンダーカット）となるように金型キ
ャビティを加工するか、別部品をインサートするか、ま
たは、基板部分と中空パイプ状部分をスポット的に接合
するようにする。 Further, the difference in linear expansion coefficient due to the material difference between the board portions and the hollow pipe-like portion, if a fear that warp is generated in the structural parts, as illustrated in FIG. 1, a substrate portion and a hollow On the mating or joining surface of the pipe-shaped part,
Taking a gap width of about 01～10Mm, and either process the molds key <br/> Yabite I so that the fitting state shown in FIG. 2 (undercut), insert a separate part or, Alternatively, the substrate portion and the hollow pipe-shaped portion are joined in a spot manner.

【００２０】上記のように、基板部分を金型キャビティ
内に装着した後、シリンダー内にて溶融した熱可塑性樹
脂を一定量に計量したのち、金型キャビティ内へ射出注
入する。但し、この溶融熱可塑性樹脂の注入量は、金型
キャビティを充填するに足らない量であり、且つ、加圧
ガス体が注入された場合にキャビティ内を充填する量と
する必要がである。[0020] As described above, after the substrate portion mounted in the mold cavity, after weighing the thermoplastic resin melted in the cylinder to a predetermined amount, injection injected into the mold Cavity I. However, the injection amount of the molten thermoplastic resin is an amount not enough to fill the mold <br/> Cavity I and, the amount of filling in Cavity I when pressurized gas body is injected It is necessary to do.

【００２１】溶融した熱可塑性樹脂が該キャビティ内へ
すべて射出注入されたと同時かやや遅くに、加圧ガス体
を金型内に設置されたガスノズルを介して金型キャビテ
ィ内の溶融熱可塑性樹脂内へ注入する。加圧ガス体とし
ては通常窒素ガスを用いるのが望ましい。[0021] soluble in melting thermoplastic resin simultaneous or slightly delayed and emitted injected all into the Cavity I, a pressurized gas member via the installed gas nozzle into the mold die Cavity
Inject into the molten thermoplastic resin . Usually, it is desirable to use nitrogen gas as the pressurized gas body.

【００２２】溶融した樹脂は加圧ガス体により押し延ば
されながら、金型キャビティの流路に添って流れる。溶
融樹脂が流路末端まで加圧ガス体にて押し延ばされた
後、加圧ガス体により溶融熱可塑性樹脂の内部から圧力
がかかり、金型に転写され、且つ、基板部分との接合が
金型キャビティ内でなされる。溶融樹脂が、冷却固化し
たのち、中空部内の圧力を大気圧とし、型開きを行っ
て、基板部分と連続した中空パイプ状部分が一体化した
製品を取り出す。[0022] The molten resin while extended pressed by the pressurized gas body, flows along the flow path of the gold Kataki Yabite I. The molten resin was pushed out to the end of the flow channel with a pressurized gas
After, pressure is applied from the interior of the molten thermoplastic resin by pressurized gas member is transferred to the mold, and bonding with the substrate portion is made in the mold Cavity I. Molten resin, after cooling and solidifying, the pressure in the hollow portion to the atmospheric pressure, subjected to mold opening
Then , a product in which the hollow pipe-shaped portion continuous with the substrate portion is integrated is taken out.

【００２３】次に、必要により、基板部分と中空パイプ
状部分が一体化した構造部品の連続した中空パイプ状部
分の両端を、機械加工にて必要な位置と形状に切削し
て、基板部分と連続した中空パイプ状部分が一体化した
構造部品を得る。Next, if necessary, board portion and the hollow pipe
Continuous hollow pipe-like portion of the structural component Jo portions are integrated
Minute at both ends, by cutting the position and shape required by machining to obtain a structural component continuous hollow pipe-like portion with the base plate portion are integrated.

【００２４】本発明の第２の態様に係る中空パイプ状部
分を有する構造部品の成形方法は、基板部分に熱可塑性
樹脂を用いた場合に限られ、第１段として基板部分を射
出成形した後、第２段として同一の射出成形機にて連続
的に中空構造部分を成形して、型開きおよび製品取り出
し時に一体化した構造部品を得る連続法である。[0024] A hollow pipe-like portion according to a second embodiment of the present invention.
The method of molding a structural component having a portion is limited to the case where a thermoplastic resin is used for the substrate portion. After the substrate portion is injection-molded as the first stage, it is continuously performed by the same injection molding machine as the second stage. This is a continuous method in which a hollow structural part is molded to obtain an integrated structural part when opening the mold and removing the product.

【００２５】本発明の第２の態様に係る中空パイプ状部
分を有する構造部品の成形方法においては、金型構造と
しては、基板部分と中空パイプ状部分の各々に樹脂ゲー
トを設ける必要があり、通常、射出成形機のシリンダは
２以上であるが、基板部分と中空パイプ状部分に同一熱
可塑性樹脂を使用する場合は、射出成形機のシリンダは
１とすることも可能である。A hollow pipe-like portion according to a second embodiment of the present invention
In the method of molding a structural part having a part, it is necessary to provide a resin gate on each of a substrate part and a hollow pipe-shaped part as a mold structure. Usually , the number of cylinders of an injection molding machine is two or more. Same heat in the part and hollow pipe-shaped part
When using the thermoplastic resin, the cylinder of the injection molding machine is also possible to 1.

【００２６】射出成形機のシリンダが１の場合、金型内
のランナー部で基板部分を形成すべき金型キャビティに
つながる流路と中空パイプ状部分を形成すべき金型キャ
ビティにつながる流路とに別け、尚かつ、一方の方向が
選択される工夫、例えば電磁式、油圧式または手動の３
方向弁を使用する必要がある。金型は、多材質射出成形
法において複数の樹脂を段階的に射出する際に使用され
ているような金型、すなわち、金型コアを回転させるこ
とによって異なったキャビティ空間を連続的に形成する
回転方式、または、金型コアの一部を可動とし、一次成
形用、二次成形用のキャビティ空間を形成するコアバッ
ク方式を使用することができる。When the cylinder of the injection molding machine is 1, the flow path leading to the mold cavity where the substrate portion is to be formed in the runner portion in the mold and the mold cap where the hollow pipe-shaped portion is to be formed.
Divided into a flow path leading to the Activity, Note and devised the one direction is selected, for example electromagnetic, hydraulic or manual 3
A directional valve must be used. The mold is a mold used when a plurality of resins are injected stepwise in a multi-material injection molding method, that is, different cavity spaces are continuously formed by rotating a mold core. rotation system, or a part of the mold core and the movable, for primary molding, it is possible to use a core-back method to form a cavity for secondary molding.

【００２７】加圧ガス体を注入するガスゲートは、樹脂
ゲートと同じ側の中空部分の端部に設けるのが望まし
い。The gas gate for injecting a pressurized gas body, to dispose the end portion of the hollow portion of the same side as the resin gate desirable.

【００２８】本発明の第２の態様に係る中空パイプ状部
分を有する構造部品の成形方法における射出工程につい
て以下に説明する。A hollow pipe-shaped part according to a second embodiment of the present invention
The injection step in the method for forming a structural part having a part will be described below.

【００２９】先ず、金型キャビティの基板部分に相当す
る部分に溶融樹脂を射出する。First, a molten resin is injected into a portion corresponding to a substrate portion of a mold cavity.

【００３０】次に、金型の回転や油圧駆動などで一段目
の成形品（基板部分）に接合した金型キャビティを形成
させ、前記一段目に射出した熱可塑性樹脂が流動性を失
った後に、中空パイプ状部分を形成する金型キャビティ
の部分に溶融熱可塑性樹脂を射出する。溶融熱可塑性樹
脂の射出量は、中空パイプ状部分を充填するに足らな
く、且つ、加圧ガス体が注入された場合、中空パイプ状
部分が溶融熱可塑性樹脂内に形成される樹脂量とし、射
出成形機より射出注入する。Next , a mold cavity joined to the first-stage molded product (substrate portion) is formed by rotation of the mold, hydraulic drive, or the like, and after the thermoplastic resin injected in the first stage loses fluidity, Mold cavity to form a hollow pipe-shaped part
The molten thermoplastic resin is injected into the portion of. The injection amount of the molten thermoplastic resin is not enough to fill the hollow pipe-shaped part, and when the pressurized gas is injected, the hollow pipe-shaped part is formed in the molten thermoplastic resin . that the amount of resin and then, emitted injected from the injection molding machine.

【００３１】金型キャビティの中空パイプ状部分を形成
する部分に溶融熱可塑性樹脂の注入が完了するのと同時
かやや遅くに、加圧ガス体を溶融熱可塑性樹脂内へ注入
し、保圧をおこなう。The rather slowly for the one co-injecting the molten thermoplastic resin to the portion forming a hollow pipe-like portion of the mold Cavity I is completed by injecting pressurized gas member into the molten thermoplastic in resin pressure-holding Perform

【００３２】金型キャビティ内の溶融熱可塑性樹脂が冷
却固化したのち、中空パイプ状部分の加圧ガス体を大気
圧に下げ、型開きをおこない構造部品を取り出す。[0032] After the molten thermoplastic resin in the mold Cavity I had cooled and solidified, lowering the pressurized gas of the hollow pipe-like portion to the atmospheric pressure, take out the structural parts subjected to mold opening.

【００３３】本発明の第２の態様に係る中空パイプ状部
分を有する構造部品の成形方法で、金型キャビティ内の
基板部分となっている隙間から加圧ガス体が抜けること
により、中空パイプ状部分のガス保圧ができない場合、
基板部分として金型内に設けられている金型キャビティ
の部分を別ブロックとする。中空パイプ状部分を溶融熱
可塑性樹脂に加圧ガス体を注入して成形する際は、金型
キャビティ内の基板部分を成形する別ブロックをスライ
ド機構等により動かし、金型キャビティ内の基板部分と
しての間隙をなくすることで、中空パイプ状部分に加圧
ガス体による保圧をかけてもガス抜けはおこらず、中空
パイプ状部分を成形することができる。[0033] Hollow pipe-shaped part according to a second embodiment of the present invention
Minute structural part of the molding process with, by pressurized gas body through a gap that is the substrate portion of the mold Cavity I escapes, may not be gas pressure holding the hollow pipe-like portion,
Mold Cavity I which is provided in the mold as the substrate portion
The parts content with another block. Heat of melting the hollow pipe
When molded by injecting a pressurized gas member on plastic resin, a separate block for molding a substrate portion in the mold <br/> Cavity I moved by a slide mechanism or the like, as a substrate portion of the mold Cavity I By eliminating the gap, even if a holding pressure is applied to the hollow pipe-shaped part by a pressurized gas,
A pipe-shaped part can be formed.

【００３４】次に、上記の別ブロックをスライド機構等
により、必要な基板部分の肉厚となるように動かして、
再度、基板部分を射出成形によって成形し、基板部分と
中空パイプ状部分が一体化した構造部品を金型内より、
取り出す。つぎに、連続した中空パイプ状部分の両端部
を機械加工にて必要なパイプ形状とし、基板部分と連続
した中空パイプ状部分が一体化した構造部品を得る。Next, the slide mechanism or the like different blocks described above, by moving so that the thickness of the substrate portions necessary,
Again , the substrate part is molded by injection molding , and the structural part in which the substrate part and the hollow pipe-shaped part are integrated is
Take out. Next, both ends of the continuous hollow pipe-shaped portion are machined into a required pipe shape, and a structural component in which the substrate portion and the continuous hollow pipe-shaped portion are integrated is obtained.

【００３５】本発明により、基板部分と連続した中空パ
イプ状部分を有した構造部品を得ることができるが、金
型内に設けた連続した中空パイプ状部分を形成すべき樹
脂流路には、いろいろパターンがある。例えば、曲がり
くねったものや枝別れしたもの、また、樹脂ゲートを２
個以上設置し、樹脂ゲートと同数のガスゲートを設けて
複数個の樹脂経路を有したものがある。前述のいろいろ
な樹脂経路の金型を用いて中空パイプ状部分を成形し、
両端部を機械加工することにより、いろいろな連続した
中空パイプ状部分を得ることができる。[0035] The present invention, it is possible to obtain a structural part having a continuous hollow pipe-shaped portion and the substrate portion, tree to form the continuous hollow pipe-like portion which is provided in the metal <br/> type < There are various patterns in the oil flow path. For example, those that have been tortuous ones or branched and, a resin gate 2
There is a case where a plurality of resin paths are provided, and the same number of gas gates as the resin gates are provided and a plurality of resin paths are provided. Mold the hollow pipe-shaped part using the molds of the various resin paths described above,
By machining both ends, various continuous hollow pipe-shaped parts can be obtained.

【００３６】基板部分が２個以上の場合、熱可塑性樹脂
による中空パイプ状部分を基板部分の間に設けた構造部
品も可能である。この場合、基板部分の間が樹脂流路と
なり各基板部分の端部と一体化されるようになる。ま
た、この場合は、全体として板状あるいは箱状またはパ
イプ状とすることができる。[0036] When board portions is two or more, structural parts provided between the base plate portion a hollow pipe-like portion by a thermoplastic resin are possible. In this case, the space between the substrate portions becomes a resin flow path and is integrated with the end of each substrate portion. Further, in this case, the entire shape may be a plate shape, a box shape, or a pipe shape.

【００３７】そり低減方法として、基板部分と中空パイ
プ状部分に間隙を設ける方法の他、中空パイプ状部分の
経路がストレートよりも湾曲して蛇行したものやクラン
ク状のものがそりが少なくなる。また基板部分と中空パ
イプ状部分を噛み合わせる方法もある。[0037] As warpage reduction method, other methods of providing a gap substrate portion and a hollow pie <br/> looped portions, which path of the hollow pipe-like portion meanders curved than straight and those cranked Warpage is reduced. There is also a method in which the substrate portion and the hollow pipe-shaped portion are engaged with each other.

【００３８】[0038]

【発明の効果】本発明によれば、基板部分と中空パイプ
状部分を有した構造部品を射出成形にて成形できるた
め、短時間に多量の同一品が得られ、生産性も向上す
る。According to the present invention, since a structural component having a substrate portion and a hollow pipe-shaped portion can be formed by injection molding, a large number of identical products can be obtained in a short time, and productivity can be improved.

【００３９】[0039]

【実施例】以下、本発明を実施例に基づき説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.

【００４０】ポリカーボネート樹脂（三菱ガス化学
（株）製、商品名：ユーピロンＮＦ２０００）を長さ４
５０ｍｍ、幅３００ｍｍ、厚み３ｍｍのシート状に成形
したものを、基板部分として、金型キャビティ内に装着
した。形成すべき中空パイプ状部分の大きさを、上辺８
ｍｍ、底辺１２ｍｍ、高さ１０ｍｍの台形状とした。ま
た、２本の中空パイプ状部分を形成する位置を、基板部
分の長さ方向に平行であって、基板部分の縁部からそれ
ぞれ１００ｍｍの位置とした。金型キャビティの形状
を、シート（基板部分）表面に、このような２本の中空
パイプ状部分であって、中空パイプ状部分の両端がシー
ト（基板部分）よりも１０ｍｍ長くなるような形状とし
た。そして、この金型キャビティ内に溶融したポリカー
ボネート樹脂（三菱ガス化学（株）製、商品名：ユーピ
ロンＳ３０００）を金型キャビティの容積の７５％を満
たすように射出した。射出する際の射出シリンダー内の
溶融熱可塑性樹脂の温度は２９０℃、射出圧は８００ｋ
ｇ／ｃｍ2であった。A polycarbonate resin (manufactured by Mitsubishi Gas Chemical Company, trade name: Iupilon NF2000) having a length of 4
A sheet formed into a sheet having a size of 50 mm, a width of 300 mm and a thickness of 3 mm was mounted in a mold cavity as a substrate portion . The size of the hollow pipe-shaped part to be formed
mm, a base of 12 mm, and a height of 10 mm. Ma
The position where the two hollow pipe-shaped portions are formed is
From the edge of the board
Each position was 100 mm. Mold cavity shape
On the sheet (substrate part) surface
A pipe-shaped part, and both ends of the hollow pipe-shaped part are sealed.
Shape (board part) to be 10mm longer
Was. Then, a molten polycarbonate resin (trade name: Iupilon S3000, manufactured by Mitsubishi Gas Chemical Co., Ltd.) was injected into the mold cavity so as to fill 75% of the volume of the mold cavity. The temperature of the molten thermoplastic resin in the injection cylinder during injection is 290 ° C and the injection pressure is 800k
g / cm 2 .

【００４１】溶融熱可塑性樹脂の射出終了と同時に、樹
脂ゲートと同一端部にあるガスゲートより窒素ガスを圧
入した。溶融熱可塑性樹脂は窒素ガスの圧入した部位の
反対方向の端部まで押し出された。その後、窒素ガスの
圧力４０ｋｇ／ｃｍ2で保持した状態で樹脂を冷却し
た。At the same time as the end of the injection of the molten thermoplastic resin, nitrogen gas was injected from the gas gate at the same end as the resin gate. The molten thermoplastic resin was extruded to the end in the opposite direction from the part where the nitrogen gas was injected . After that, the resin was cooled in a state of being held at a pressure 40 kg / cm 2 in nitrogen gas.

【００４２】次いで、中空パイプ状部分内の窒素ガス圧
を大気圧まで下げて、離型後、構造 部品を取り出した。
その後、構造部品の中空パイプ状部分の両端１０ｍｍを
切断し、連続した中空パイプ状部分を有する構造部品を
得た。[0042] Subsequently, nitrogen gas pressure of the hollow pipe-shaped inner portion down to atmospheric pressure, after the release, was removed structural parts.
Thereafter, both ends of the hollow pipe-shaped portion of the structural component were cut at 10 mm to obtain a structural component having a continuous hollow pipe-shaped portion .

【図面の簡単な説明】[Brief description of the drawings]

【図１】図１は、基板部分と中空パイプ状部分の間にそ
り防止のための間隙を設けた構造部品の長さ方向の断面
図の例を示す図である。FIG . 1 is a view showing an example of a longitudinal sectional view of a structural component in which a gap for preventing warpage is provided between a substrate portion and a hollow pipe-shaped portion.

【図２】図２は、金属製の基板に嵌合状態を形成するよ
うに中空パイプ状部分を射出成形した構造部品の幅方向
の断面図の例を示す。FIG. 2 shows an example of a cross-sectional view in the width direction of a structural component in which a hollow pipe- shaped portion is injection-molded so as to form a fitted state on a metal substrate.

【符号の説明】[Explanation of symbols]

１：金属製基板 ２：熱可塑性樹脂 ３：中空パイプ状部分 1: metal substrate 2: thermoplastic resin 3: hollow pipe-shaped part

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−118122（ＪＰ，Ａ) 特開 平２−108510（ＪＰ，Ａ) 特開 平３−286816（ＪＰ，Ａ) 特開 平２−114695（ＪＰ，Ａ) 特開 昭63−149123（ＪＰ，Ａ) 特開 昭59−222324（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B29D 22/00 B29C 45/14 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-118122 (JP, A) JP-A-2-108510 (JP, A) JP-A-3-286816 (JP, A) JP-A-2- 114695 (JP, A) JP-A-63-149123 (JP, A) JP-A-59-222324 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B29D 22/00 B29C 45 /14

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】射出成形機を使用して、熱可塑性樹脂から
成る中空パイプ状部分と、樹脂若しくは金属から成る基
板部分とから構成される構造部品を成形する方法であっ
て、 （Ａ）該基板部分を予め射出成形機の金型キャビティ内
に装着する工程と、 （Ｂ）溶融熱可塑性樹脂を、該金型キャビティ内に必要
量、射出する工程と 、（Ｃ）該中空パイプ状部分を構成する溶融熱可塑性樹脂
の 部分に加圧ガス体を注入して、以て、該基板部分上に
中空パイプ状部分を形成する工程と、 （Ｄ）該基板部分上に中空パイプ状部分が形成された構
造部品を金型キャビティから取り出した後、中空パイプ
状部分の両端を切断する工程、 から成る ことを特徴とする中空パイプ状部分を有する構
造部品の成形方法。1. An injection molding machine for converting thermoplastic resin.
There in a method of forming a hollow pipe-like portion, a structural component composed of a group <br/> plate portion made of resin or metal comprising
Te, (A) a step of mounting a substrate portion in advance injection molding machine mold cavity, (B) a molten thermoplastic resin, required in the mold cavity
The amount, a step of injecting the molten thermoplastic resin constituting the (C) the hollow pipe-like portion
Portion by injecting pressurized gas of, following Te, forming a hollow pipe-like portion on the substrate portion, (D) configuration of a hollow pipe-like portion on the substrate on portion is formed
After removing the component from the mold cavity, the hollow pipe
Method of forming structural parts having a hollow pipe-like portion for cutting the ends of Jo portion that consists, characterized. 【請求項２】前記基板部分は熱可塑性樹脂から成り、 前記工程（Ｂ）において、溶融熱可塑性樹脂を基板部分
に熱融着させる ことを特徴とする請求項１に記載の中空
パイプ状部分を有する構造部品の成形方法。Wherein said substrate section is made of thermoplastic resin, in the step (B), the substrate portion molten thermoplastic resin
The hollow according to claim 1, wherein the hollow portion is thermally fused.
A method for forming a structural component having a pipe-shaped portion . 【請求項３】前記基板部分には孔部が設けられており、3. A substrate according to claim 1, wherein said substrate has a hole. 前記工程（Ｂ）において、溶融熱可塑性樹脂を基板部分In the step (B), the molten thermoplastic resin is
に設けられた孔部と部分的に嵌合状態とさせることを特Specially fit into the hole provided in the
徴とする請求項１に記載の中空パイプ状部分を有する構A structure having the hollow pipe-shaped portion according to claim 1.
造部品の成形方法。The method of forming a molded part. 【請求項４】射出成形機を使用して、熱可塑性樹脂から
成る中空パイプ状部分と、該熱可塑性樹脂と同一若しく
は異種の熱可塑性樹脂から成る基板部分とから構成され
る構造部品を成形する方法であって、 （Ａ）金型キャビティの基板部分を形成すべき部分に溶
融熱可塑性樹脂を射出して基板部分を形成する工程と、 （Ｂ）溶融熱可塑性樹脂を、金型キャビティの中空パイ
プ状部分を形成すべき部分に必要量、射出する工程と、 （Ｃ）工程（Ｂ）において射出された溶融熱可塑性樹脂
内に加圧ガス体を注入して、以て、該基板部分上に中空
パイプ状部分を形成する工程と、 （Ｄ）該基板部分上に中空パイプ状部分が形成された構
造部品を金型キャビティから取り出した後、中空パイプ
状部分の両端を切断する工程、 から成る ことを特徴とする中空パイプ状部分を有する構
造部品の成形方法。4. Use of an injection molding machine to convert thermoplastic resin
A hollow pipe-like portion composed, same as the thermoplastic resin Moshiku
It is a method of forming a structural part consisting of a substrate portion of a thermoplastic resin heterologous substrate portion by injecting a molten thermoplastic resin in the portion to form the substrate portion of (A) a mold cavity And ( B) melting the thermoplastic resin into the hollow pie of the mold cavity.
A step of injecting a necessary amount into a portion where a loop-shaped portion is to be formed; and (C) a molten thermoplastic resin injected in the step (B).
A pressurized gas body is injected into the
Forming a pipe-shaped portion; and (D) forming a hollow pipe-shaped portion on the substrate portion.
After removing the component from the mold cavity, the hollow pipe
Method of forming structural parts having a hollow pipe-like portion for cutting the ends of Jo portion that consists, characterized.
JP17555092A 1992-07-02 1992-07-02 Method of forming structural part having hollow pipe-shaped part Expired - Lifetime JP3326200B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17555092A JP3326200B2 (en) 1992-07-02 1992-07-02 Method of forming structural part having hollow pipe-shaped part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17555092A JP3326200B2 (en) 1992-07-02 1992-07-02 Method of forming structural part having hollow pipe-shaped part

Publications (2)

Publication Number Publication Date
JPH0615759A JPH0615759A (en) 1994-01-25
JP3326200B2 true JP3326200B2 (en) 2002-09-17

Family

ID=15998045

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17555092A Expired - Lifetime JP3326200B2 (en) 1992-07-02 1992-07-02 Method of forming structural part having hollow pipe-shaped part

Country Status (1)

Country Link
JP (1) JP3326200B2 (en)

Also Published As

Publication number Publication date
JPH0615759A (en) 1994-01-25

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