JPS6116107Y2 - - Google Patents
Info
- Publication number
- JPS6116107Y2 JPS6116107Y2 JP12697678U JP12697678U JPS6116107Y2 JP S6116107 Y2 JPS6116107 Y2 JP S6116107Y2 JP 12697678 U JP12697678 U JP 12697678U JP 12697678 U JP12697678 U JP 12697678U JP S6116107 Y2 JPS6116107 Y2 JP S6116107Y2
- Authority
- JP
- Japan
- Prior art keywords
- runner
- tunnel gate
- mold
- pin
- head
- 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
Links
- 238000001125 extrusion Methods 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 230000000694 effects Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
本考案は、トンネルゲート方式の樹脂成形金型
において、トンネルゲートを付けたランナーを製
品から切り離して離型するランナー押出しピンに
関するものである。[Detailed Description of the Invention] The present invention relates to a runner extrusion pin for separating a runner with a tunnel gate attached thereto from the product and releasing the mold in a tunnel gate type resin molding mold.
従来、一般的なトンネルゲート方式の金型に使
用されているランナー押出しピンの形状は、第１
図に示すように、押出しピン１の頭部２は平にな
つていた。 Conventionally, the shape of the runner extrusion pin used in general tunnel gate molds is
As shown in the figure, the head 2 of the ejector pin 1 was flat.
成形能率の増加を図る為、成形サイクルの短縮
を行なうと、ランナー部３の冷却は遅くなり突出
し時に変形を生じ、押出しピン頭部２より離脱し
て離型が不完全になり、ランナー部３がそのまま
型上に残留し自動取出しが出来ないと言う問題が
あり、又そのままの状態で更に、成形サイクルを
進行し金型を閉じると、金型内のキヤビテイ面又
は押切り面等を損傷すると言うような問題点があ
つた。 When the molding cycle is shortened in order to increase molding efficiency, the cooling of the runner part 3 is delayed, deformation occurs during ejection, and the runner part 3 is detached from the ejector pin head 2, resulting in incomplete mold release. There is a problem that the mold remains on the mold and cannot be taken out automatically, and if the molding cycle continues and the mold is closed in that state, it may damage the cavity surface or stamped surface in the mold. There was a problem as mentioned.
本考案の目的は、上記した従来技術の問題点を
なくし、トンネルゲートを付けたランナーを、製
品から切り離して金型から確実に離型させて事故
発生を防止し、確実な自動取出しと成形サイクル
の短縮とをはかるようにしたトンネルゲート方式
の樹脂成形金型におけるランナー押出しピンを提
供することにある。 The purpose of this invention is to eliminate the above-mentioned problems of the conventional technology, to prevent accidents by separating the runner with the tunnel gate from the product and reliably releasing it from the mold, and to ensure automatic ejection and molding cycle. It is an object of the present invention to provide a runner extrusion pin for a tunnel gate type resin molding die, which is designed to shorten the time.
本考案は上記目的を達成するために、トンネル
ゲート方式の樹脂成形金型において、トンネルゲ
ートを付けたランナーを製品から切り離して離型
するランナー押出しピンの頭部を円錐、または円
錐台、に形成し、ランナー押出しピンの頭部にラ
ンナーの押出し部を固定させた状態で相当大きな
力を要するトンネルゲートを付けたランナーを確
実に離型して事故発生の防止をはかり、成形サイ
クルの短縮がはかれるようにしたことを特徴とす
るトンネルゲート方式の樹脂成形金型におけるラ
ンナー押出しピンである。 In order to achieve the above-mentioned object, the present invention provides a runner ejection pin for a tunnel gate type resin molding die, which has a conical or truncated cone head for separating a runner with a tunnel gate from a product to release it from the mold, and with the extrusion portion of the runner fixed to the head of the runner ejection pin, it is possible to reliably release a runner with a tunnel gate, which requires a considerable amount of force, thereby preventing accidents and shortening the molding cycle.
以下本考案を図に示す実施例にもとづいて具体
的に説明する。 The present invention will be specifically described below based on embodiments shown in the drawings.
第２図は、本考案によるランナー押出しピンを
応用した金型の一実施例を示すもので、その構成
は、円錐台形状の頭部２を有する押出しピン１
と、半円筒状の横溝ランナー３とテーパー形状の
スプルー穴４を設けた固定型７及び、半円筒状の
横溝ランナー３とその先端に設けてある斜め下方
に向つたテーパー形状穴トンネルゲート５及び押
出しピン１を挿入する穴６を設けた可動型８の三
点の部品から成つている。 FIG. 2 shows an embodiment of a mold to which the runner extrusion pin according to the present invention is applied, and its configuration is as follows: an extrusion pin 1 having a truncated conical head 2;
, a fixed mold 7 having a semi-cylindrical horizontal groove runner 3 and a tapered sprue hole 4, a semi-cylindrical horizontal groove runner 3 and a tunnel gate 5 with a tapered hole facing diagonally downward provided at its tip; It consists of three parts: a movable mold 8 provided with a hole 6 into which an extrusion pin 1 is inserted.
成形機により可動型８を移動させ固定型７に閉
着させる。その後スプルー４より成形用樹脂が流
れ込みランナ１３を通過しトンネルゲート５を経
てキヤビテイ内へ流れ込み成形を完了する。成形
完了後、可動型８を後退させ金型を開き、押出し
ピンにより製品とトンネルゲートを付けたランナ
ーとは別々に離型され、既設の自動取出し機によ
り製品と、トンネルゲートを付けたランナーを取
り出すようにしている。 The movable mold 8 is moved by the molding machine and closed to the fixed mold 7. Thereafter, molding resin flows from the sprue 4, passes through the runner 13, passes through the tunnel gate 5, and flows into the cavity to complete the molding. After the molding is completed, the movable mold 8 is moved back and the mold is opened, and the product and the runner with the tunnel gate are separated from the mold by the extrusion pin, and the product and the runner with the tunnel gate are separated by the existing automatic take-out machine. I'm trying to take it out.
特にこの樹脂成形の場合、押出しピンの作用
で、製品とトンネルゲートの先とを切り離すと共
にランナーと一体となつたトンネルゲートを可動
型のトンネルゲートから変形させて抜く必要があ
る。そためランナー３の押出し部６と押出しピン
頭部２との間に相当な力が作用することになり、
逃げやすくなる。しかしこの押出しピン１は円錐
台形状の頭部２を持つていてくい込む形となつて
いるため、ランナー３の押出し部６が押出しピン
頭部２にしつかり固定され、逃げて離脱すること
がなく、確実にトンネルゲートを付けたランナー
を製品から切り離して離型することができる。 Particularly in the case of this resin molding, it is necessary to separate the product from the end of the tunnel gate by the action of an extrusion pin, and also to deform and pull out the tunnel gate, which is integrated with the runner, from the movable tunnel gate. Therefore, a considerable force acts between the extrusion part 6 of the runner 3 and the extrusion pin head 2,
Escape becomes easier. However, since this push-out pin 1 has a truncated conical head 2 and is shaped to bite into it, the push-out portion 6 of the runner 3 is firmly fixed to the push-out pin head 2, preventing it from escaping and separating. , it is possible to reliably separate the runner with the tunnel gate from the product and release it from the mold.
尚、上記に示した押出しピンは一実施例であ
り、頭部形状が円錐台形状であるが、第３図に示
すように更に楔効果をもたせるために円錐形状も
可能である。 The push-out pin shown above is one embodiment and has a truncated conical head shape, but as shown in FIG. 3, a conical shape is also possible to provide a wedge effect.
以上説明したように本考案によれば、トンネル
ゲートを付けたランナーの離型を確実にすること
ができ、事故発生を防止し、確実な自動取出し
と、成形サイクルの短縮とをはかることができる
作用効果を奏する。 As explained above, according to the present invention, it is possible to ensure the release of a runner with a tunnel gate, prevent accidents, ensure reliable automatic ejection, and shorten the molding cycle. It has an effect.
第１図は、従来の金型の閉じた状態を示す断面
図、第２図は、本考案のランナー押出しピンを応
用した金型の一実施例を示す断面図、第３図は、
第２図に示すランナー押出しピンの他の実施例を
示した図である。
符号の説明、１……押出しピン、２……押出し
ピン頭部、３……ランナー、４……スプルー穴、
５……トンネルゲート、６……挿入穴、７……固
定型、８……可動型、６′……押出し部。
FIG. 1 is a cross-sectional view showing a conventional mold in a closed state, FIG. 2 is a cross-sectional view showing an embodiment of a mold to which the runner ejector pin of the present invention is applied, and FIG.
FIG. 3 is a diagram showing another embodiment of the runner ejector pin shown in FIG. 2; Explanation of symbols, 1...Eject pin, 2...Eject pin head, 3...Runner, 4...Sprue hole,
5... Tunnel gate, 6... Insertion hole, 7... Fixed type, 8... Movable type, 6'... Extruded part.
Claims (1)
トンネルゲートを付けたランナーを製品から切り
離して離型するランナー押出しピンの頭部を円
錐、または円錐台、に形成し、ランナー押出しピ
ンの頭部にランナーの押出し部を固定させた状態
でトンネルゲートを付けたランナーを離型するこ
とを特徴とするトンネルゲート方式の樹脂成形金
型におけるランナー押出しピン。 In the tunnel gate type resin mold,
The runner with the tunnel gate attached is separated from the product and released from the product.The head of the runner extrusion pin is formed into a cone or truncated cone, and the tunnel gate is formed with the extrusion part of the runner fixed to the head of the runner extrusion pin. A runner extrusion pin for a tunnel gate type resin molding die, which is characterized by releasing a runner with a .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12697678U JPS6116107Y2 (en) | 1978-09-18 | 1978-09-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12697678U JPS6116107Y2 (en) | 1978-09-18 | 1978-09-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5545509U JPS5545509U (en) | 1980-03-25 |
| JPS6116107Y2 true JPS6116107Y2 (en) | 1986-05-19 |
Family
ID=29089316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12697678U Expired JPS6116107Y2 (en) | 1978-09-18 | 1978-09-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6116107Y2 (en) |
-
1978
- 1978-09-18 JP JP12697678U patent/JPS6116107Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5545509U (en) | 1980-03-25 |
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