JPS6194731A - Loading mechanism - Google Patents

Loading mechanism

Info

Publication number
JPS6194731A
JPS6194731A JP21512284A JP21512284A JPS6194731A JP S6194731 A JPS6194731 A JP S6194731A JP 21512284 A JP21512284 A JP 21512284A JP 21512284 A JP21512284 A JP 21512284A JP S6194731 A JPS6194731 A JP S6194731A
Authority
JP
Japan
Prior art keywords
runner
molten resin
cavity
gate
cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP21512284A
Other languages
Japanese (ja)
Inventor
Kiyoharu Yokoyama
横山　清春
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP21512284A priority Critical patent/JPS6194731A/en
Publication of JPS6194731A publication Critical patent/JPS6194731A/en
Pending 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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • 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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • B29C2045/2709—Gates with a plurality of mould cavity inlets in close proximity

Landscapes

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

Abstract

PURPOSE:To perform highly accurately injection of plastics whose flowability is not favorable, by arranging in multi-step state a plurality of gates communicating with cavities on one end part of a piece of a runner part along one side of the runner part. CONSTITUTION:A cross-sectional area A1 of a gate 10 at an inlet of a cavity 13 is set up about indentically with cross-sectional areas A2, A3 (A2=A3) of gates 11, 12. Molten resin arrives at a runner 4 through a sprue part and runner 3, a flow is halved in a V-shaped groove 8 and flows along taper parts 9, 9 in the directions of arrows 16, 17. Filling of the molten resin to both sides of the cavity 13 is not performed at last and pressure transmission can be performed without being influenced by notched parts 14, 15.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、プラスチックの射出成形用の注入機構に関す
る。TECHNICAL FIELD OF THE INVENTION The present invention relates to an injection mechanism for injection molding of plastics.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

一般に、プラスチックの射出成形においては。 Generally, in plastic injection molding.

成形機のノズルから射出された溶融樹脂は、スプルー、
ランナー及びゲートからなる注入機構を介してキャビテ
ィに充填される。しかして、スプルーは、金型の入口部
に位置し、可塑化・溶融された樹脂をランナーに送る役
目をしている。また、ランナーは、スプルーとキャビテ
ィを結ぶ溶融樹脂の流れ路であシ、できるだけ流動抵抗
が少なく。The molten resin injected from the nozzle of the molding machine is sprue,
The cavity is filled through an injection mechanism consisting of a runner and a gate. The sprue is located at the entrance of the mold and serves to transport plasticized and melted resin to the runner. In addition, the runner is a flow path for molten resin that connects the sprue and the cavity, minimizing flow resistance.

かつ冷えにくいことが望ましい。さらに、ゲートは、５
ンナーの終点であり、キャビティへの入口であって、そ
の位置・形状・寸法は、成形品の外観や成形効率および
寸法精度に大きな影響を与える。したがりて、ゲートは
、溶融樹脂がキャビティの末端まで完全に充填されるよ
うな位置に配設されている。It is also desirable to not get cold easily. Furthermore, the gate is 5
It is the end point of the molded product and the entrance to the cavity, and its position, shape, and dimensions have a significant impact on the appearance, molding efficiency, and dimensional accuracy of the molded product. Therefore, the gate is positioned such that the molten resin completely fills the cavity to the end.

しかし、使用されるプラスチックの種類が、流動性がす
こぶる悪いものである場合は、所望の寸法精度を得るこ
とが困難である。たとえば、ガラス繊維含有ポリイミド
樹脂を用いて第３図に示すように射出成形を行ったとこ
ろ、ゲート（Ａ）を通過した溶融樹脂は、グー）　（Ａ
）の断面積と＃１ぼ同じ断面積のひも状となってキャビ
ティ（Ｂ）中に流入する。しかして、ひも状樹脂は、キ
ャビティ（Ｂ）のゲート（Ａ）とは反対側から折）重力
るように層状に充填し、最後に、キャビティ（Ｂ）のゲ
ー）（Ａ）同側隅部に充填される。しかし、溶融樹脂の
流動性が不足していることによシ、溶融樹脂の充填が円
滑に行われないため未充填部分（Ｃ）が生じる。However, if the type of plastic used has very poor fluidity, it is difficult to obtain the desired dimensional accuracy. For example, when injection molding was performed using glass fiber-containing polyimide resin as shown in Figure 3, the molten resin that passed through the gate (A) was
) flows into the cavity (B) in the form of a string with a cross-sectional area approximately the same as #1. The string-shaped resin is then folded from the side opposite to the gate (A) of the cavity (B) and filled in a layered manner so as to be gravitational. is filled with. However, due to insufficient fluidity of the molten resin, filling with the molten resin is not performed smoothly, resulting in an unfilled portion (C).

このため、わざわざ取代を設け、射出成形後に。For this reason, we took the trouble to provide machining allowance after injection molding.

例えば研削加工などによυ後加工せねばならない不具合
を生じている。For example, a problem arises in which post-processing such as grinding is required.

〔発明の・目的〕[Purpose of the invention]

本発明は、上記事情を参酌してなされたもので。 The present invention has been made in consideration of the above circumstances.

流動性のよくないプラスチックの射出成形を確実かつ高
精度に行うことのできる注入機構を提供することを目的
とする。It is an object of the present invention to provide an injection mechanism that can perform injection molding of plastics with poor flowability reliably and with high precision.

〔発明の概要〕[Summary of the invention]

〔発明の実施例〕 以下、本発明の一実施例を図面を参照して詳述この注入
機構は、スプルー部（図示せず）と、このスプルー部に
一端部が連接しているランナ一部（１）と、この、ラン
ナ一部（１）の他端部に連接されたゲート部（２）とか
らなっている。上記スプルー部は。[Embodiment of the Invention] An embodiment of the present invention will be described below in detail with reference to the drawings. (1), and a gate part (2) connected to the other end of the runner part (1). The above sprue part.

、射出機構のノズルに連結しているスプループツシ−に
よ多形成されるものであって、円柱状をなしている。ま
た、ランナ一部（１）は、金型に形成された溝によ）形
成されるものであって、スプルー部に直結している半円
柱の第１のランナー（３）と、この第１のランナー（３
）に一端部が接続され他端部がゲート部（２）　７′Ｊ
接続された第２ランナー（４）とからなっている。この
第２のランナー（４）は、高さく１１）は第１のランナ
ー（３）の半径ｒに等しく、内径りは、第１のランナー
（３）の内径ｄよシ大きく、かつ軸線方向が第１のラン
ナー（３）の軸線とほぼ直交するように配設されている
。そして、この第２のランナー包）は、固定金型（５）
に第２のランナー（４）とほぼ同軸に垂設されている分
岐ピン（６）によシ流路が２分岐されている。この分岐
ビン（６）は、第２図に示すように、可動金型（７）ま
では達せず、分岐ビン（６）の下端部側において、第２
のランナー（４）の流路は２分岐されていない。さらに
、分岐ピン（６）は、その軸方向に第１のランナー（３
）に対向する７字溝（８）が刻設されている。この７字
溝（８）の両縁部には丸み（几）がつけられてｂる。さ
らに１分岐ビン（６）の両側部には、ゲート部（２）に
向って拡開するテーパ部（９）、（９）が形成されてい
る。また１分岐ビン（６）のゲート部（２）に対向する
面は円柱状面となっている。一方。The sprue is connected to the nozzle of the injection mechanism, and has a cylindrical shape. The runner part (1) is formed by a groove formed in the mold, and includes a semi-cylindrical first runner (3) directly connected to the sprue part, and a semi-cylindrical first runner (3) that is directly connected to the sprue part. runner (3
) and the other end is the gate part (2) 7'J
It consists of a connected second runner (4). This second runner (4) has a height 11) equal to the radius r of the first runner (3), an inner diameter larger than the inner diameter d of the first runner (3), and an axial direction. It is disposed substantially perpendicular to the axis of the first runner (3). Then, this second runner package) is made of a fixed mold (5).
The flow path is branched into two by a branching pin (6) vertically installed substantially coaxially with the second runner (4). As shown in FIG. 2, this branch bottle (6) does not reach the movable mold (7), but is placed in the second position at the lower end of the branch bottle (6).
The flow path of the runner (4) is not branched into two. Furthermore, the branch pin (6) has a first runner (3) in its axial direction.
) is carved with a 7-shaped groove (8) that faces it. Both edges of this 7-shaped groove (8) are rounded. Further, tapered portions (9), (9) that widen toward the gate portion (2) are formed on both sides of the one-branch bin (6). Further, the surface of the one-branch bin (6) facing the gate portion (2) is a cylindrical surface. on the other hand.

ゲート部（２）は、横断面が半円形の第１．第２．第３
のゲートα０）、　（１１）、αりからなっている。こ
のうち。The gate section (2) has a first section having a semicircular cross section. Second. Third
It consists of gates α0), (11), and α. this house.

第１のゲートαｅは、第１のランナー（３）とほぼ同軸
となるように、矩形板状をなすキャビティ（１３）と第
２のランナー（４）との間に配設されている。また、第
２、第３のゲートａυ、　ａ’ａは、第１のゲー）Ｈの
両側にキャビティＱ３の切欠部０４）、α９をはさむよ
うに設けられていて、第２のランナー（４）からキャビ
ティ峙の両側端部に溶融樹脂を直接供給するように設け
られている。そして、第１のゲー）　（１（Ｉｆのキャ
ビティ（１３）入口における断面積Ａ、は、第２．第３
のゲートαａ、（ｔａの断面積Ａ、　、　Ａ、にほぼ等
しく設定されている３、また％第２．第３のゲー）Ｑｌ
）、α擾の断面積Ａ、、Ａｓは１等しく設定されている
。The first gate αe is arranged between the rectangular plate-shaped cavity (13) and the second runner (4) so as to be substantially coaxial with the first runner (3). In addition, the second and third gates aυ and a'a are provided on both sides of the first gate (H) so as to sandwich the notch 04) and α9 of the cavity Q3, and the second runner (4) The molten resin is provided to directly supply the molten resin from the cavity to both end portions facing the cavity. Then, the cross-sectional area A at the entrance of the cavity (13) of the first game) (1 (If) is
The gate αa, (3, which is set approximately equal to the cross-sectional area of ta, A, , A, and the %2nd.3rd gate) Ql
), the cross-sectional areas A, , As of α are set equal to 1.

しかして、上記構成の注入機構において、ノズルよシ溶
融樹脂を注入すると、溶融樹脂は、スプルー部及び第１
のランナー（３）を経由して、第２のランナ−（４）に
達する。すると、溶融樹脂は、７字溝（８）に突き尚シ
、流れが２分して、テーパ部（９）、（９）に沿って矢
印ｎ＊、顛方肉方向れる。ついで、溶融樹脂は、第１．
第２．第３のゲートα１．αη、（１つを経由してキャ
ビティ０３に充填する。この場合、第２゜第３のゲート
ａυ、（１りがキャビティａ湯の両側部に配設されてい
るので、キャビティー（１３両側部への溶融樹脂の充填
が最後に行われることはない。また、保圧（ゲート・シ
ール）中においても、切欠部α荀。Therefore, in the injection mechanism having the above configuration, when the molten resin is injected through the nozzle, the molten resin flows through the sprue portion and the first
The second runner (4) is reached via the first runner (3). Then, the molten resin is pushed into the 7-shaped groove (8), and the flow is divided into two and flows in the direction of the arrow n* along the tapered portions (9), (9). Next, the molten resin is transferred to the first.
Second. Third gate α1. In this case, the second and third gates aυ, (1 are disposed on both sides of the cavity A, The notch is not filled with molten resin at the end.Also, even during holding pressure (gate sealing), the notch is filled with molten resin.

ａ９の影響を受けずに圧力伝達を行うことができる。Pressure transmission can be performed without being affected by a9.

これらの諸効果が相俟って、成形精度が向上し。These effects work together to improve molding accuracy.

後加工が不要となる。とりわけ、溶融樹脂としてたとえ
ばガラス繊維含有ポリイミド樹脂などの流動性がよくな
いものを用いる場合に顕著な効果を奏する。No post-processing is required. This is particularly effective when using a molten resin with poor fluidity, such as a glass fiber-containing polyimide resin.

なお、上記実施例は、キャビティが１個の場合を例示し
ているが、キャビティが２個以上の場合にも適用できる
。また１分岐ピンは、上記実施例のように異形状のもの
でなく、溶融樹脂を分流するものであれば、断面が流線
形２円形、惰円形等。In addition, although the above-mentioned example illustrates the case where there is one cavity, it can also be applied to the case where there are two or more cavities. Further, the single branch pin does not have an irregular shape as in the above embodiment, but if it separates the molten resin, the cross section may be a streamlined bicircular shape, an inert circular shape, or the like.

任意形状でよい。さらに、ゲート部（２）のゲートの本
数及び断面積は、キャピテイ（１３）の大きさに応じて
適宜に設定してよい。また、上記実施例においては１分
岐ピンは、可動金型にまで達していないが、固定金型と
可動金型との間に橋絡するように設けてもよい。Any shape is acceptable. Further, the number of gates and the cross-sectional area of the gate portion (2) may be appropriately set depending on the size of the cavity (13). Further, in the above embodiment, the one-branch pin does not reach the movable mold, but it may be provided so as to bridge between the fixed mold and the movable mold.

〔発明の効果〕〔Effect of the invention〕

本発明の注入機構は、溶融樹脂のキャビティの充填を、
その大きさ、形状に関係なく一様に行うことができる。The injection mechanism of the present invention fills the cavity with molten resin.
This can be done uniformly regardless of its size and shape.

し７ｔがって、成形精度が向上し。As a result, molding accuracy is improved.

後加工が不要となる。とシわけ１本発明は、流動性の悪
いプラスチックを用いる場合に有効である。No post-processing is required. Disclosure 1 The present invention is effective when using plastics with poor fluidity.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は不発明の一実施例の注入機溝の平面図。 第２図は第１図のＩＩＩＩ腺矢視断面図、第３図は従来
の注入機４１を示す平面図である。 （１）　：　７ンナ一部、　　　　　（２）　：ゲート
部。 傾：第１のゲート、　　　　（１１）：第２のゲート。 （１７Ｊ：第３のゲート、　　　α３：キャビティ。 代理人　弁理士　　則　近　憲　佑 （ほか１名）FIG. 1 is a plan view of an injector groove according to an embodiment of the invention. FIG. 2 is a sectional view taken along the arrow III in FIG. 1, and FIG. 3 is a plan view showing a conventional injection machine 41. (1): Part of 7-na, (2): Gate part. Inclination: first gate, (11): second gate. (17J: Third gate, α3: Cavity. Agent: Patent attorney Noriyuki Chika (and 1 other person)

Claims (1)

【特許請求の範囲】[Claims] 溶融樹脂を導入するスプルー部と、このスプルー部に一
端部が連接され上記溶融樹脂を案内するランナー部と、
一端部が上記ランナー部に連接されるとともに他端部が
キャピティに連接されかつ一側部に沿って多段に配設さ
れた複数のゲートからなり上記溶融樹脂を上記キャピテ
ィに充填させるゲート部とを具備することを特徴とする
注入機構。a sprue portion for introducing the molten resin; a runner portion having one end connected to the sprue portion and guiding the molten resin;
a gate section for filling the cavity with the molten resin, the gate section having one end connected to the runner section and the other end connected to the cavity and arranged in multiple stages along one side; An injection mechanism comprising:
JP21512284A 1984-10-16 1984-10-16 Loading mechanism Pending JPS6194731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21512284A JPS6194731A (en) 1984-10-16 1984-10-16 Loading mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21512284A JPS6194731A (en) 1984-10-16 1984-10-16 Loading mechanism

Publications (1)

Publication Number Publication Date
JPS6194731A true JPS6194731A (en) 1986-05-13

Family

ID=16667097

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21512284A Pending JPS6194731A (en) 1984-10-16 1984-10-16 Loading mechanism

Country Status (1)

Country Link
JP (1) JPS6194731A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0875354A1 (en) * 1996-01-18 1998-11-04 Hoya Corporation Method of manufacturing lens, injection mold for molding of lens, and molded lens
EP1108517A1 (en) * 1998-06-03 2001-06-20 Naka Kogyo Co. Ltd. Grained injection molded product and method and device for producing grained injection molded product

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0875354A1 (en) * 1996-01-18 1998-11-04 Hoya Corporation Method of manufacturing lens, injection mold for molding of lens, and molded lens
EP0875354A4 (en) * 1996-01-18 2000-03-15 Hoya Corp Method of manufacturing lens, injection mold for molding of lens, and molded lens
EP1108517A1 (en) * 1998-06-03 2001-06-20 Naka Kogyo Co. Ltd. Grained injection molded product and method and device for producing grained injection molded product
EP1108517A4 (en) * 1998-06-03 2003-03-19 Naka Kogyo Co Ltd Grained injection molded product and method and device fop rroducing grained injection molded product

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