JP2006281622A - Double resin injection molding method, resin product molded by the method, and regulator case for alternator - Google Patents

Double resin injection molding method, resin product molded by the method, and regulator case for alternator Download PDF

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JP2006281622A
JP2006281622A JP2005104889A JP2005104889A JP2006281622A JP 2006281622 A JP2006281622 A JP 2006281622A JP 2005104889 A JP2005104889 A JP 2005104889A JP 2005104889 A JP2005104889 A JP 2005104889A JP 2006281622 A JP2006281622 A JP 2006281622A
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mold
molded product
resin
primary molded
injection molding
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Japanese (ja)
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Mitsunori Yanagi
光教 柳
Tsutomu Onoe
勉 尾上
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Denso Corp
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Denso Corp
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Priority to JP2005104889A priority Critical patent/JP2006281622A/en
Priority to GB0606569A priority patent/GB2424613B/en
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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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0046—Details relating to the filling pattern or flow paths or flow characteristics of moulding material in the mould cavity
    • 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
    • B29C45/14065—Positioning or centering articles in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0239—Electronic boxes
    • 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
    • B29C45/14639—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 for obtaining an insulating effect, e.g. for electrical components
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1671—Making multilayered or multicoloured articles with an insert

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double resin injection molding method which can mold a regulator case 1 for an alternator as a secondary molding by fixing a primary molding 3 surely to the inside of a mold without using a presser pin by using a molten resin packing pressure efficiently. <P>SOLUTION: When the primary molding 3 is contacted with the molding wall parts 4b and 4c of a fixed mold 4 and a movable mold 5 in a plurality of spots to be positioned, and the molten resin is packed in a cavity W from a gate 11, the arrangement of the gate 11 is set so that the contact state of the primary molding 3 in relation to the molding wall parts 4b and 4c of the fixed mold 4 and the movable mold 5 is held by the molten resin packing pressure applied to the inside of the cavity W. Since the primary molding 3 is held by being contacted with the molding wall parts 4b and 4c of the fixed mold 4 and the movable mold 5, the regulator case 1 for the alternator can be molded by fixing the primary molding 3 surely to the inside of the cavity W without using the presser pin. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、一次成型品を金型に配置して樹脂により二次成型品を成型する二重樹脂射出成型方法に係り、とりわけ溶融樹脂の充填時に金型内に生じる充填圧を利用して一次成型品を安定させる二重樹脂射出成型方法、その方法で成型された樹脂製品及びオルタネータ用レギュレータケースに関する。   The present invention relates to a double resin injection molding method in which a primary molded product is placed in a mold and a secondary molded product is molded with a resin. In particular, the primary pressure is obtained by using a filling pressure generated in a mold when filling a molten resin. The present invention relates to a double resin injection molding method for stabilizing a molded product, a resin product molded by the method, and a regulator case for an alternator.

熱可塑性樹脂によりインサート部品を一次成型品として埋設する樹脂被覆成型方法では、固定金型及び可動金型のうち少なくも一方に進退変位可能なスリーブ状の押えピンをインサート部品支持部材として備えた射出成型用の金型が使用されている（例えば、特許文献１参照）。
インサート部品は、金型内で押えピンにより所定の位置に押圧保持されており、金型空間内に溶融樹脂を注入した後に押えピンの先端を金型の内壁部と一致する位置まで後退させている。この後、金型内で後退した押えピンが占めていた空容積部分に溶融樹脂を充填し、内部にインサート部品を埋設した二次成型品を成型する方法が採用されている。
実開平５−６８６２１号公報 In a resin coating molding method in which an insert part is embedded as a primary molded product with a thermoplastic resin, an injection having a sleeve-like presser pin that can be moved back and forth in at least one of a fixed mold and a movable mold as an insert part support member. A mold for molding is used (for example, see Patent Document 1).
The insert part is pressed and held at a predetermined position by a presser pin in the mold, and after the molten resin is injected into the mold space, the end of the presser pin is retracted to a position that matches the inner wall of the mold. Yes. After that, a method is adopted in which a molten resin is filled in an empty volume portion occupied by a presser pin that has been retreated in a mold, and a secondary molded product in which an insert part is embedded is molded.
Japanese Utility Model Publication No. 5-68621

この場合、インサート部品が内部にターミナル等を埋設した電装部品であると、上記の射出成型用の金型を用いて、金型空間内に溶融樹脂を注入する時、溶融樹脂の流動先頭部（メルトフロント）が出会う合流点で、二次成型品の外表面部にウエルドライン（鋳造でいう湯境）が生じて製品価値を下げるといった不都合が起こる。
ウエルドラインの発生を避けるため、押えピンの後退時期を早めると、金型内に注入された溶融樹脂の充填圧によりインサート部品が押されて正規の位置から大きくずれ、インサート部品の一部が成型後に外部に露呈することがある。
インサート部品の一部が露呈したまま車両に搭載して使用すると、露呈する部分と二次成型品の樹脂との間から内部に水分が浸入し、ターミナル間で電気リークが生じたり、ターミナルの腐食が進行する虞がある。 In this case, when the insert part is an electrical part with a terminal or the like embedded therein, when the molten resin is injected into the mold space using the above-described injection mold, the molten resin flow head ( At the confluence where the melt front meets, a weld line (a hot water boundary in casting) occurs on the outer surface of the secondary molded product, resulting in a disadvantage that the product value is lowered.
In order to avoid the occurrence of weld lines, if the retraction time of the presser pin is advanced, the insert part is pushed by the filling pressure of the molten resin injected into the mold and greatly deviates from the normal position, and a part of the insert part is molded. May be exposed to the outside later.
If a part of the insert part is mounted and used in a vehicle, moisture will enter the interior from between the exposed part and the resin of the secondary molded product, causing electrical leakage between terminals or corrosion of the terminal. May progress.

この発明の目的は、一次成型品を金型の成型壁部に当接させ、充填時の溶融樹脂の充填圧を有効利用することにより、押えピンを用いることなく一次成型品を金型内で確実に固定させて二次成型品を良好に成型することができ、一次成型品がターミナル等を埋設した電装部品の場合でも、ターミナル間で電気リークが生じる不都合やターミナル等の腐食が進行する虞のない二重樹脂射出成型方法、その方法で成型された樹脂製品及びオルタネータ用レギュレータケースを提供するにある。   The object of the present invention is to bring the primary molded product into the mold without using a presser pin by bringing the primary molded product into contact with the molding wall of the mold and effectively using the filling pressure of the molten resin at the time of filling. It can be fixed securely and the secondary molded product can be molded well, and even if the primary molded product is an electrical component with embedded terminals, etc., there is a risk of electrical leakage between the terminals and corrosion of the terminals may progress And a regulator case for an alternator, and a resin product molded by the method.

この発明の請求項１では、一次成型品を金型内に配置し、ゲートから金型内に溶融樹脂を充填して二次成型品となす二重樹脂射出成型方法において、一次成型品を金型の成型壁部に複数箇所で当接させて位置決めし、ゲートから溶融樹脂を金型内に充填する際、金型内に加わる溶融樹脂の充填圧により、金型の成型壁部に対する一次成型品の当接状態が保持されるようにゲートの配置を設定している。   According to the first aspect of the present invention, in the double resin injection molding method in which the primary molded product is disposed in the mold and the molten resin is filled into the mold from the gate to form the secondary molded product, the primary molded product is molded into the mold. When the molten resin is placed in contact with the mold wall at multiple locations and filled with molten resin from the gate, the primary molding of the mold wall is performed by the molten resin filling pressure applied to the mold. The gate arrangement is set so that the contact state of the product is maintained.

一次成型品を金型の成型壁部に当接させて、充填時の溶融樹脂の充填圧を有効利用することにより、押えピンを用いることなく一次成型品を金型内で確実に固定させて二次成型品を良好に成型することができる。押えピンが不要なためコスト的に有利であるとともに、二次成型品の成型作業の迅速化が図られて良好な生産性が得られる。   By making the primary molded product abut against the mold wall of the mold and effectively using the molten resin filling pressure at the time of filling, the primary molded product can be securely fixed in the mold without using a presser pin. Secondary molded products can be molded well. Since the presser pin is not required, it is advantageous in terms of cost, and the molding operation of the secondary molded product can be speeded up and good productivity can be obtained.

この発明の請求項２では、ターミナル等を樹脂で埋設して成型した一次成型品を金型内に配置し、ゲートから金型内に溶融樹脂を充填してオルタネータ用レギュレータケースを成型して二次成型品となす二重樹脂射出成型方法において、一次成型品を金型の成型壁部に複数箇所で当接させて位置決めし、ゲートから溶融樹脂を金型内に充填する際、金型内に加わる溶融樹脂の充填圧により、金型の成型壁部に対する一次成型品の当接状態が保持されるようにゲートの配置を設定している。   According to a second aspect of the present invention, a primary molded product obtained by embedding a terminal or the like with a resin is placed in a mold, a molten resin is filled from the gate into the mold, and an alternator regulator case is molded. In the double resin injection molding method to be the next molded product, the primary molded product is positioned by contacting the mold wall of the mold at multiple locations, and when filling the molten resin from the gate into the mold, The arrangement of the gates is set so that the contact state of the primary molded product against the molding wall portion of the mold is maintained by the filling pressure of the molten resin applied to the mold.

ターミナル等を樹脂で埋設して成型した一次成型品を金型の成型壁部に複数箇所で当接させて、充填時に溶融樹脂の充填圧を有効利用することにより、押えピンを用いることなく一次成型品を金型内で確実に固定させてオルタネータ用レギュレータケースを二次成型品として良好に成型することができる。押えピンが不要なためコスト的に有利であるとともに、オルタネータ用レギュレータケースの成型作業の迅速化が図られて良好な生産性が得られる。   The primary molded product formed by embedding terminals etc. with resin is brought into contact with the molding wall of the mold at multiple locations, and the molten resin filling pressure is effectively used during filling, so that the primary can be used without using a presser pin. The molded product can be securely fixed in the mold, and the alternator regulator case can be satisfactorily molded as a secondary molded product. Since the presser pin is unnecessary, it is advantageous in terms of cost, and it is possible to speed up the molding operation of the regulator case for the alternator and to obtain good productivity.

この発明の請求項３では、一次成型品は、金型の成型壁部に三カ所またはそれ以上の箇所で当接して位置決めされていることを特徴とする。このため、金型に対する一次成型品の当接状態が堅固になり、一次成型品を金型内で一層安定させて保持することができて良好な成型性に寄与する。   According to a third aspect of the present invention, the primary molded product is positioned in contact with the molding wall portion of the mold at three or more locations. For this reason, the contact state of the primary molded product with respect to the mold becomes firm, and the primary molded product can be held more stably in the mold, contributing to good moldability.

この発明の請求項４では、二重樹脂射出成型方法により成型された二次成型品が樹脂製品であるため、その樹脂製品がコスト的に有利で生産性の高いものとなる。   According to the fourth aspect of the present invention, since the secondary molded product molded by the double resin injection molding method is a resin product, the resin product is advantageous in terms of cost and has high productivity.

この発明の請求項５では、二重樹脂射出成型方法により成型された二次成型品がオルタネータ用レギュレータケースであるため、そのオルタネータ用レギュレータケースがコスト的に有利で生産性の高いものとなる。   According to the fifth aspect of the present invention, since the secondary molded product molded by the double resin injection molding method is the alternator regulator case, the alternator regulator case is cost effective and highly productive.

この発明の請求項６では、金型の成型壁部に対する一次成型品の当接部分は、成型完了後に防水構造を付与する箇所である。このため、金型に対する当接部分で一次成型品の一部が露出しても、一次成型品の露出した部分は、成型完了後に防水構造が付与されるので、水分の浸透を招く浸水経路を形成することがない。これにより、樹脂製品の場合には、一次成型品の露出部分にも確実な水密構造を実現させることができる。
また、オルタネータ用レギュレータケースの場合には、一次成型品に埋設されたターミナル間で電気リークが生じる不都合やターミナル等の腐食が進行する虞がなくオルタネータ用レギュレータケースの良好な機能を長期にわたって維持することができる。 According to claim 6 of the present invention, the contact portion of the primary molded product with respect to the molding wall portion of the mold is a portion to which a waterproof structure is imparted after the molding is completed. For this reason, even if a part of the primary molded product is exposed at the contact portion with the mold, the exposed portion of the primary molded product is provided with a waterproof structure after the molding is completed. There is no formation. Thereby, in the case of a resin product, a reliable watertight structure can be realized also in the exposed part of the primary molded product.
In the case of an alternator regulator case, the good function of the alternator regulator case can be maintained for a long time without inconvenience of electrical leakage between terminals embedded in the primary molded product and the possibility of corrosion of the terminal. be able to.

一次成型品を金型の成型壁部に当接させて、充填時に溶融樹脂の充填圧を有効利用することにより、押えピンを用いることなく一次成型品を金型内で確実に固定させて二次成型品を良好に成型することができ、一次成型品がターミナル等を埋設した電装部品の場合であっても、ターミナル間で電気リークが生じる不都合やターミナル等の腐食が進行する虞がない。   By making the primary molded product abut against the mold wall of the mold and effectively using the filling pressure of the molten resin at the time of filling, the primary molded product can be securely fixed in the mold without using a presser pin. The next molded product can be molded satisfactorily, and even if the primary molded product is an electrical component in which terminals and the like are embedded, there is no risk of incurring electrical leakage between the terminals and corrosion of the terminals.

この発明を樹脂製品としてオルタネータ用レギュレータケースに適用した実施例１について図１ないし図４を参照しながら説明する。
図１及び図２に示すオルタネータ用レギュレータケース１は、インサート成型により内部にターミナル２が埋設された一次成型品３を、後述する金型４、５（図４参照）を用いて熱可塑性の樹脂により成型して二次成型品としたものである。 A first embodiment in which the present invention is applied as a resin product to a regulator case for an alternator will be described with reference to FIGS.
A regulator case 1 for an alternator shown in FIG. 1 and FIG. 2 is a thermoplastic resin using a mold 4 and 5 (see FIG. 4), which will be described later, as a primary molded product 3 in which a terminal 2 is embedded by insert molding. Is formed into a secondary molded product.

オルタネータ用レギュレータケース１は、内部にハイブリッドＩＣ基板６等の回路基板や電子素子を組込むもので、例えば車両に搭載されてエンジンの出力により駆動されるオルタネータ（図示せず）に取付けられている。オルタネータからの三相交流は、ハイブリッドＩＣ基板６等の機能に基づいて変動の少ない一定した直流に整流されて車両のバッテリーの充電や車載の各電装部品に供給されるようになっている。オルタネータ用レギュレータケース１内でハイブリッドＩＣ基板６に位置する箇所には、シリコンゲルＳが封入されてハイブリッドＩＣ基板６を浸水から保護する防水構造が形成されるものである。   The alternator regulator case 1 incorporates a circuit board such as a hybrid IC board 6 and an electronic element therein, and is attached to, for example, an alternator (not shown) mounted on a vehicle and driven by an engine output. The three-phase alternating current from the alternator is rectified to a constant direct current with little fluctuation based on the function of the hybrid IC substrate 6 and the like, and is supplied to the vehicle battery and the vehicle-mounted electrical components. In the alternator regulator case 1, a waterproof structure for protecting the hybrid IC substrate 6 from water immersion is formed by sealing the silicon gel S at a position located on the hybrid IC substrate 6.

オルタネータ用レギュレータケース１を二次成型品として成型するにあたっては、図４（ａ）、（ｂ）に示すように、射出成形装置を構成する固定金型４と可動金型５を用いて内部にキャビティＷを形成する。一次成型品３は、固定金型４と可動金型５との間に設置され、図３に示すようにターミナル２をインサート成型したコネクタ部７と接続端子８をインサート成型した延出部９とから成っている。コネクタ部７と延出部９の境界部には、角柱状の補強部１０を一体に形成している。   When the alternator regulator case 1 is molded as a secondary molded product, as shown in FIGS. 4A and 4B, a fixed mold 4 and a movable mold 5 constituting the injection molding apparatus are used to internally A cavity W is formed. The primary molded product 3 is installed between the fixed mold 4 and the movable mold 5, and as shown in FIG. 3, a connector part 7 in which the terminal 2 is insert-molded and an extension part 9 in which the connection terminal 8 is insert-molded, Consists of. A prismatic reinforcing portion 10 is integrally formed at the boundary between the connector portion 7 and the extending portion 9.

一次成型品３は、その外形形状を考慮して固定金型４と可動金型５のキャビティＷ内に配され、固定金型４と可動金型５の成型壁部４ｂ、４ｃに複数箇所（当接部Ｐ１、Ｐ２）で当接させることで位置保持されている。すなわち、一次成型品３の延出部９を固定金型４と可動金型５の成型壁部４ｂに当接部Ｐ１で当接させるとともに、補強部１０を固定金型４と可動金型５の成型壁部４ｃに当接部Ｐ２で当接させ、一次成型品３をキャビティＷ内で安定させた状態で固定している。溶融樹脂をキャビティＷ内に注入するゲート１１は、固定金型４の後側面部４ａで一次成型品３の延出部９に対向する位置に形成されている。   The primary molded product 3 is arranged in the cavity W of the fixed mold 4 and the movable mold 5 in consideration of the outer shape thereof, and a plurality of locations (on the molding wall portions 4b and 4c of the fixed mold 4 and the movable mold 5 ( The position is maintained by abutting at the abutting portions P1, P2). That is, the extension part 9 of the primary molded product 3 is brought into contact with the molding wall part 4b of the fixed mold 4 and the movable mold 5 at the contact part P1 and the reinforcing part 10 is fixed to the fixed mold 4 and the movable mold 5. The primary molded product 3 is fixed in a state of being stabilized in the cavity W by being brought into contact with the molding wall portion 4c at the contact portion P2. The gate 11 for injecting the molten resin into the cavity W is formed at a position facing the extending portion 9 of the primary molded product 3 on the rear side surface portion 4 a of the fixed mold 4.

上記構成において、図４に矢印Ａで示すように、溶融樹脂をゲート１１から固定金型４と可動金型５のキャビティＷ内に注入して充填すると、溶融樹脂の充填圧が一次成型品３に作用し、矢印Ｂで示すように延出部９を固定金型４と可動金型５の成型壁部４ｂに当接させる方向に押圧するとともに、矢印Ｃで示すように補強部１０を固定金型４と可動金型５の成型壁部４ｃに当接させる方向に押圧する。これと同時に、同図に示すように溶融樹脂の充填圧が延出部９の右端面部９ａに働いて矢印Ｄ方向の押圧力と拮抗する。   In the above configuration, as shown by an arrow A in FIG. 4, when molten resin is injected from the gate 11 into the cavity W of the fixed mold 4 and the movable mold 5 and filled, the filling pressure of the molten resin becomes the primary molded product 3. As shown by an arrow B, the extending portion 9 is pressed in a direction to contact the fixed mold 4 and the molding wall portion 4b of the movable mold 5 and the reinforcing portion 10 is fixed as shown by an arrow C. Pressing is performed in a direction in which the mold 4 and the movable mold 5 are brought into contact with the molding wall 4c. At the same time, as shown in the figure, the filling pressure of the molten resin acts on the right end surface portion 9a of the extending portion 9 to antagonize the pressing force in the arrow D direction.

このように、溶融樹脂の充填時に一次成型品は、延出部９及び補強部１０を固定金型４と可動金型５に当接部Ｐ１、Ｐ２で当接させ、充填圧を延出部９の右端面部９ａから押圧力として受けるので、一次成型品３が固定金型４と可動金型５のキャビティＷ内で確実に固定されてオルタネータ用レギュレータケース１を二次成型品として良好に成型することができる。   As described above, when the molten resin is filled, the primary molded product is such that the extending portion 9 and the reinforcing portion 10 are brought into contact with the fixed mold 4 and the movable mold 5 at the contact portions P1 and P2, and the filling pressure is increased. 9 is received as a pressing force from the right end surface portion 9a, so that the primary molded product 3 is securely fixed in the cavity W of the fixed mold 4 and the movable mold 5 and the alternator regulator case 1 is molded as a secondary molded product. can do.

成型後に全体を冷却して可動金型５を固定金型４から離脱させてオルタネータ用レギュレータケース１をキャビティＷから取り出す。キャビティＷから取り出したオルタネータ用レギュレータケース１の矩形枠室Ｒ内には、図１に示すハイブリッドＩＣ基板６が収容され、シリコンゲルＳの封入により防水構造が施される。矩形枠室Ｒの上端開口部には、ハイブリッドＩＣ基板６からの熱を放出するフィン付き放熱板１３が設けられ、下端開口部には、防水構造に対する蓋板１２が被せられている。   After molding, the whole is cooled, the movable mold 5 is detached from the fixed mold 4, and the alternator regulator case 1 is taken out from the cavity W. A hybrid IC substrate 6 shown in FIG. 1 is accommodated in the rectangular frame chamber R of the alternator regulator case 1 taken out from the cavity W, and a waterproof structure is provided by sealing the silicon gel S. The upper end opening of the rectangular frame chamber R is provided with a finned heat dissipating plate 13 that releases heat from the hybrid IC substrate 6, and the lower end opening is covered with a cover plate 12 for the waterproof structure.

（実施例１の効果）
固定金型４と可動金型５に対する一次成型品３の当接状態と溶融樹脂の充填圧を有効利用することにより、押えピンを用いることなく一次成型品３をキャビティＷ内で確実に固定させてオルタネータ用レギュレータケース１を二次成型品として成型することができる。押えピンが不要なためコスト的に有利であるとともに、オルタネータ用レギュレータケース１の成型作業の迅速化が図られて良好な生産性を実現させることができる。 (Effect of Example 1)
By effectively utilizing the contact state of the primary molded product 3 with the fixed mold 4 and the movable mold 5 and the filling pressure of the molten resin, the primary molded product 3 can be securely fixed in the cavity W without using a presser pin. Thus, the alternator regulator case 1 can be molded as a secondary molded product. Since the presser pin is not required, it is advantageous in terms of cost, and the molding operation of the alternator regulator case 1 can be speeded up so that good productivity can be realized.

固定金型４と可動金型５の成型壁部４ｂ、４ｃに対する一次成型品３の当接部Ｐ１、Ｐ２は、成型完了後にシリコンゲルＳで防水構造を付与する箇所である。このため、一次成型品３の一部が当接部Ｐ１、Ｐ２で露出しても、一次成型品３の露出した部分は、成型完了後にシリコンゲルの封入により防水構造が施されるので、水分の浸透を招く浸水経路を形成することがない。この結果、一次成型品３に埋設されたターミナル２間で電気リークが生じる不都合やターミナル２等の腐食が進行する虞がなくオルタネータ用レギュレータケース１の良好な機能を長期にわたって維持することができる。   The contact portions P1 and P2 of the primary molded product 3 with respect to the molding walls 4b and 4c of the fixed mold 4 and the movable mold 5 are places where a waterproof structure is imparted by the silicon gel S after the molding is completed. For this reason, even if a part of the primary molded product 3 is exposed at the contact portions P1 and P2, the exposed portion of the primary molded product 3 is provided with a waterproof structure by sealing with silicone gel after molding is completed. It is not possible to form a flooding path that leads to the penetration of water. As a result, there is no inconvenience that electric leakage occurs between the terminals 2 embedded in the primary molded product 3, and there is no possibility of corrosion of the terminals 2 or the like, and the good function of the alternator regulator case 1 can be maintained for a long time.

図５はこの発明の実施例２を示す。
実施例２が実施例１と異なるところは、一次成型品３における延出部９の右端外側面に面取り状の傾斜部９ｂを設けたことである。これにより、延出部９の隅角部で溶融樹脂の澱みが生じず流動性が向上して良好な成型性に資することができる。なお、可動金型５について、図５では示していないが、図４の（ｂ）に示す可動金型５があるものとしている。後述する実施例３ないし実施例５でも同様とする。 FIG. 5 shows Embodiment 2 of the present invention.
The difference between the second embodiment and the first embodiment is that a chamfered inclined portion 9 b is provided on the outer right side surface of the extending portion 9 in the primary molded product 3. Thereby, stagnation of the molten resin does not occur at the corners of the extension part 9, and the fluidity can be improved, contributing to good moldability. Although the movable mold 5 is not shown in FIG. 5, it is assumed that there is the movable mold 5 shown in FIG. The same applies to Examples 3 to 5 described later.

図６はこの発明の実施例３を示す。
実施例３が実施例１と異なるところは、一次成型品３における延出部９の右端面部９ａに角部９ｃを設け、当接部Ｐ３で固定金型４と可動金型５の成型壁部４ｄに当接させたことである。角部９ｃの形成により、一次成型品３を三カ所で固定金型４と可動金型５に当接させることができ、キャビティＷ内で一次成型品３の保持状態が一層安定して良好な成型性に資する。 FIG. 6 shows Embodiment 3 of the present invention.
The third embodiment differs from the first embodiment in that a corner portion 9c is provided on the right end surface portion 9a of the extending portion 9 in the primary molded product 3, and the molding wall portions of the fixed mold 4 and the movable mold 5 are formed at the contact portion P3. 4d. By forming the corner portion 9c, the primary molded product 3 can be brought into contact with the fixed mold 4 and the movable mold 5 at three locations, and the holding state of the primary molded product 3 in the cavity W is more stable and good. Contributes to moldability.

図７はこの発明の実施例４を示す。
実施例４が実施例３と異なるところは、ゲート１１を固定金型４の右側面部４ｅに設けたことである。この場合、一次成型品３の外側面部に左上がりのテーパ部３ａを設け、溶融樹脂がテーパ部３ａを流動する際に生じる垂直分力Ｅにより一次成型品３を固定金型４と可動金型５に当接させる押圧分力が生じるようにしている。
ゲート１１を固定金型４の右側面部４ｅに設けたことは、固定金型４や可動金型５等の設置の関係からゲート１１を固定金型４の後側面部４ａに設けることが困難で、溶融樹脂の充填により一次成型品３を固定金型４と可動金型５に当接固定させ難い場合に好都合である。 FIG. 7 shows Embodiment 4 of the present invention.
The fourth embodiment differs from the third embodiment in that the gate 11 is provided on the right side surface portion 4 e of the fixed mold 4. In this case, a taper portion 3a that rises to the left is provided on the outer surface portion of the primary molded product 3, and the primary molded product 3 is fixed to the fixed mold 4 and the movable mold by the vertical component force E generated when the molten resin flows through the tapered portion 3a. A pressing component force to be brought into contact with 5 is generated.
Providing the gate 11 on the right side surface 4e of the fixed mold 4 makes it difficult to provide the gate 11 on the rear side surface 4a of the fixed mold 4 because of the installation of the fixed mold 4 and the movable mold 5. This is convenient when it is difficult to contact and fix the primary molded product 3 to the fixed mold 4 and the movable mold 5 by filling the molten resin.

図８はこの発明の実施例５を示す。
実施例５が実施例１と異なるところは、ゲート１１を固定金型４の左側面部４ｆに設けたことである。この場合、一次成型品３の外側面部に右上がりのテーパ部３ｂを設け、溶融樹脂がテーパ部３ｂを流動する際に生じる垂直分力Ｆにより一次成型品３を固定金型４と可動金型５に当接させる押圧分力が生じるようにしている。一次成型品３の補強部１０には、固定金型４と可動金型５の成型壁部４ｃに当接する腕部１０ａを延設し、溶融樹脂の射出時にコネクタ部７から受ける押圧力に対向できるようにしている。
この場合、ゲート１１の形成位置は、一次成型品３に種々の方向のテーパ面を形成して、溶融樹脂がテーパ面に流動する際の分力により、一次成型品３を固定金型４と可動金型５に当接させて押圧力を生じさせ得る箇所であればよい。 FIG. 8 shows Embodiment 5 of the present invention.
The fifth embodiment differs from the first embodiment in that the gate 11 is provided on the left side surface portion 4 f of the fixed mold 4. In this case, a taper portion 3b that rises to the right is provided on the outer surface portion of the primary molded product 3, and the primary molded product 3 is fixed to the fixed mold 4 and the movable mold by the vertical component force F generated when the molten resin flows through the tapered portion 3b. A pressing component force to be brought into contact with 5 is generated. The reinforcing part 10 of the primary molded product 3 is provided with an arm part 10a that abuts against the molding wall part 4c of the fixed mold 4 and the movable mold 5 so as to oppose the pressing force received from the connector part 7 when the molten resin is injected. I can do it.
In this case, the formation position of the gate 11 is such that a taper surface in various directions is formed on the primary molded product 3, and the primary molded product 3 is connected to the fixed mold 4 by a component force when the molten resin flows on the tapered surface. Any place that can be brought into contact with the movable mold 5 to generate a pressing force may be used.

（変形例）
上記実施例１では、一次成型品３にターミナル２等を有するインサート部品を適用し、二次成型品にオルタネータ用レギュレータケース１を用いたが、これらに限らず種々の機能部品を成型対象の樹脂製品として採用してもよい。防水構造を施すには、シリコンゲルＳに限らず、例えばエポキシ樹脂等を用いて形成した液密充填物であればよい。その他、一次成型品３の形状によって固定金型４と可動金型５への当接箇所は三カ所に限らず、それ以上にも設定でき、二次成型品に用いる熱可塑性の樹脂の種類は問わない。 (Modification)
In the first embodiment, the insert part having the terminal 2 or the like is applied to the primary molded product 3 and the regulator case 1 for the alternator is used as the secondary molded product. It may be adopted as a product. The waterproof structure is not limited to the silicon gel S, and may be a liquid-tight filler formed using, for example, an epoxy resin. In addition, the location of contact with the fixed mold 4 and the movable mold 5 is not limited to three locations depending on the shape of the primary molded product 3 and can be set to more than that. The types of thermoplastic resins used for the secondary molded product are It doesn't matter.

押えピンを用いることなく一次成型品を金型内で安定状態に保持させて二次成型品を良好に成型することができ、一次成型品がターミナル等を埋設した電装部品の場合であっても、ターミナル間で電気リークが生じる不都合やターミナル等の腐食が進行する虞がない。このため、二次成型品の品質性及び耐久性により需要を喚起し、各種部品の流通を介して化学・機械産業界に広く適用することができる。   The primary molded product can be held in a stable state in the mold without using a presser pin, and the secondary molded product can be molded well. Even if the primary molded product is an electrical component with an embedded terminal etc. There is no inconvenience that electrical leakage occurs between terminals and there is no risk of corrosion of the terminals. For this reason, demand can be stimulated by the quality and durability of the secondary molded product, and it can be widely applied to the chemical and mechanical industries through the distribution of various parts.

オルタネータ用レギュレータケースの分解斜視図である（実施例１）It is a disassembled perspective view of the regulator case for alternators (Example 1). 一次成型品を埋設して樹脂成型したオルタネータ用レギュレータケースの斜視図である（実施例１）。(Example 1) which is the perspective view of the regulator case for alternators which embed | buried the primary molded product and resin-molded. インサート成型品である一次成型品の斜視図である（実施例１）。(Example 1) which is a perspective view of the primary molded product which is an insert molded product. （ａ）はオルタネータ用レギュレータケースを二次成型品として樹脂成型する固定金型の横断面図、（ｂ）は可動金型を含む状態で（ａ）のＸ−Ｘ線に沿って切断した横断面図である（実施例１）。(A) is a cross-sectional view of a fixed mold for resin-molding an alternator regulator case as a secondary molded product, and (b) is a cross section cut along line XX in (a) with a movable mold included. (Example 1) which is a top view. オルタネータ用レギュレータケースを二次成型品として樹脂成型する固定金型の横断面図である（実施例２）。(Example 2) which is a cross-sectional view of the fixed metal mold | die which resin-molds the regulator case for alternators as a secondary molded product. オルタネータ用レギュレータケースを二次成型品として樹脂成型する固定金型の横断面図である（実施例３）。(Example 3) which is a cross-sectional view of the fixed metal mold | die which resin-molds the regulator case for alternators as a secondary molded product. オルタネータ用レギュレータケースを二次成型品として樹脂成型する固定金型の横断面図である（実施例４）。(Example 4) which is a cross-sectional view of the fixed metal mold | die which resin-molds the regulator case for alternators as a secondary molded product. オルタネータ用レギュレータケースを二次成型品として樹脂成型する固定金型の横断面図である（実施例５）。(Example 5) which is a cross-sectional view of the fixed metal mold | die which resin-molds the regulator case for alternators as a secondary molded product.

符号の説明Explanation of symbols

１ オルタネータ用レギュレータケース（二次成型品、樹脂製品）
２ ターミナル
３ 一次成型品
４ 固定金型（金型）
５ 可動金型（金型）
４ｂ 成型壁部
４ｃ 成型壁部
４ｄ 成型壁部
６ ハイブリッドＩＣ基板
１１ ゲート
Ｓ シリコンゲル（防水構造）
Ｐ１、Ｐ２、Ｐ３ 当接部
Ｗ キャビティ 1 Alternator regulator case (secondary molded product, resin product)
2 Terminal 3 Primary molding 4 Fixed mold (mold)
5 Movable mold (mold)
4b Molded wall 4c Molded wall 4d Molded wall 6 Hybrid IC substrate 11 Gate S Silicon gel (waterproof structure)
P1, P2, P3 Contact part W Cavity

Claims (6)

一次成型品を金型内に配置し、ゲートから金型内に溶融樹脂を充填して二次成型品となす二重樹脂射出成型方法において、
前記一次成型品を前記金型の成型壁部に複数箇所で当接させて位置決めし、
前記ゲートから前記溶融樹脂を前記金型内に充填する際、前記金型内に加わる前記溶融樹脂の充填圧により、前記金型の成型壁部に対する前記一次成型品の当接状態が保持されるように前記ゲートの配置を設定したことを特徴とする二重樹脂射出成型方法。 In a double resin injection molding method in which a primary molded product is placed in a mold and a molten resin is filled into the mold from the gate to form a secondary molded product.
The primary molded product is positioned in contact with the molding wall of the mold at a plurality of locations,
When the molten resin is filled into the mold from the gate, the contact state of the primary molded product against the molding wall portion of the mold is maintained by the filling pressure of the molten resin applied to the mold. A double resin injection molding method characterized in that the arrangement of the gates is set as described above. ターミナル等を樹脂で埋設して成型した一次成型品を金型内に配置し、ゲートから前記金型内に溶融樹脂を充填してオルタネータ用レギュレータケースを成型して二次成型品となす二重樹脂射出成型方法において、
前記一次成型品を前記金型の成型壁部に複数箇所で当接させて位置決めし、
前記ゲートから前記溶融樹脂を前記金型内に充填する際、前記金型内に加わる溶融樹脂の充填圧により、前記金型の成型壁部に対する前記一次成型品の当接状態が保持されるように前記ゲートの配置を設定したことを特徴とするオルタネータ用レギュレータケースの二重樹脂射出成型方法。 A primary molded product that is molded by embedding terminals etc. with resin is placed in the mold, and the mold is filled with molten resin from the gate to mold the alternator regulator case to form a secondary molded product. In the resin injection molding method,
The primary molded product is positioned in contact with the molding wall of the mold at a plurality of locations,
When the molten resin is filled into the mold from the gate, the contact state of the primary molded product against the molding wall portion of the mold is maintained by the filling pressure of the molten resin applied to the mold. A double resin injection molding method of a regulator case for an alternator, wherein the arrangement of the gate is set in 請求項１または２に記載の二重樹脂射出成型方法において、前記一次成型品は、前記金型の成型壁部に三カ所またはそれ以上の箇所で当接して位置決めされていることを特徴とする二重樹脂射出成型方法。   The double resin injection molding method according to claim 1 or 2, wherein the primary molded product is positioned in contact with the molding wall portion of the mold at three or more locations. Double resin injection molding method. 請求項１に記載の二重樹脂射出成型方法により前記二次成型品として成型されたことを特徴とする樹脂製品。   A resin product molded as the secondary molded product by the double resin injection molding method according to claim 1. 請求項２に記載の二重樹脂射出成型方法により前記二次成型品として成型されたことを特徴とするオルタネータ用レギュレータケース。   A regulator case for an alternator, which is molded as the secondary molded product by the double resin injection molding method according to claim 2. 請求項１または２に記載の二重樹脂射出成型方法において、前記金型の成型壁部に対する前記一次成型品の当接部分は、成型完了後に防水構造を付与する箇所であることを特徴とする二重樹脂射出成型方法。   3. The double resin injection molding method according to claim 1, wherein a contact portion of the primary molded product with respect to a molding wall portion of the mold is a portion to which a waterproof structure is provided after the molding is completed. Double resin injection molding method.
JP2005104889A 2005-03-31 2005-03-31 Double resin injection molding method, resin product molded by the method, and regulator case for alternator Withdrawn JP2006281622A (en)

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JP2016137639A (en) * 2015-01-28 2016-08-04 矢崎総業株式会社 Method for manufacturing electric box made of resin
CN114536646A (en) * 2021-10-29 2022-05-27 浙江新大塑料管件有限公司 Electric smelting pipe fitting wire winding drawing of patterns all-in-one

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JP4742877B2 (en) * 2006-01-18 2011-08-10 住友電装株式会社 Molded structure of resin molded product
JP4349437B2 (en) 2007-06-04 2009-10-21 株式会社デンソー Manufacturing method of electronic device
EP2446865A1 (en) 2010-10-28 2012-05-02 Louise Mohn Thermostimulation apparatus
GB2500633A (en) * 2012-03-27 2013-10-02 Louise Mohn Moulding method

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JP2526754B2 (en) * 1991-09-28 1996-08-21 オムロン株式会社 Molding method for insert part of terminal fittings of electrical equipment
JPH0780890A (en) * 1993-09-13 1995-03-28 Ueda Kanagata:Kk Molding method for synthetic resin product with insert embedded and synthetic resin biological model with insert wire embedded
TW446622B (en) * 1999-05-10 2001-07-21 Takara Co Ltd Arm for an elastic doll, its molding method and forming mold

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Publication number Priority date Publication date Assignee Title
JP2016137639A (en) * 2015-01-28 2016-08-04 矢崎総業株式会社 Method for manufacturing electric box made of resin
CN114536646A (en) * 2021-10-29 2022-05-27 浙江新大塑料管件有限公司 Electric smelting pipe fitting wire winding drawing of patterns all-in-one
CN114536646B (en) * 2021-10-29 2023-11-17 浙江新大塑料管件有限公司 Wire winding and demolding integrated machine for electric smelting pipe fitting

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GB0606569D0 (en) 2006-05-10

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