JPS6023969B2 - injection mold - Google Patents
injection moldInfo
- Publication number
- JPS6023969B2 JPS6023969B2 JP12979781A JP12979781A JPS6023969B2 JP S6023969 B2 JPS6023969 B2 JP S6023969B2 JP 12979781 A JP12979781 A JP 12979781A JP 12979781 A JP12979781 A JP 12979781A JP S6023969 B2 JPS6023969 B2 JP S6023969B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- ejector pin
- guide sleeve
- ejector
- plate
- 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
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
- B29C45/40—Removing or ejecting moulded articles
Description
【発明の詳細な説明】
合成樹脂の射出成形を行う場合、固定型をキャビティ側
、移動型をコア側とし、型開きの際には成形品を移動型
に付着させて取り出すのが普通である。[Detailed description of the invention] When performing injection molding of synthetic resin, the fixed mold is placed on the cavity side and the movable mold is placed on the core side, and when the mold is opened, the molded product is attached to the movable mold and taken out. .
移動型のコァ部にかぶさった成形品はェジェクタピンで
突き外されることになるが、コア部が形開き方向に長い
形状になっているとそれに応じてェジェクタピンのスト
ロークも長大になる。しかしながらェジェクタピンがあ
まりに長大すると座屈の危険が生じる上、金型のスペー
スの問題もあり、思い通りのストロークを得られないこ
とも多い。本発明は上記の点に鑑みてなされたものであ
り、ェジェクタピンを徒に長大化することなくして大き
な突き出しストロークを得ることを目的とする。以下そ
の一実施例を図に基いて説明する。図において、１は固
定型、２は移動型である。The molded product that covers the core of the movable mold is ejected by the ejector pin, but if the core has a long shape in the mold opening direction, the stroke of the ejector pin will be correspondingly long. However, if the ejector pin is too long, there is a risk of buckling, and there is also the problem of mold space, so it is often impossible to obtain the desired stroke. The present invention has been made in view of the above points, and it is an object of the present invention to obtain a large ejection stroke without unnecessarily increasing the length of the ejector pin. An example of this will be explained below based on the drawings. In the figure, 1 is a fixed type and 2 is a movable type.
固定型１にはキャビティ部３、移動型２にはコア部４が
形設される。キャビティ部３とコア部４の間に成形され
る成形品５は、固定型１の奥行き方向に長い長首部分５
ａを有しており、これが移動型２からの離脱を困難にし
ている。６は溶融樹脂の通路となるスプールプツシュで
ある。７は移動型２の空間８の中に、型開き方向と平行
に往復動できるよう設けられたェジェクタプレートで、
第１プレート７ａと第２プレート７ｂを俊離可能に重ね
た構成になっている。A cavity portion 3 is formed in the fixed mold 1, and a core portion 4 is formed in the movable mold 2. The molded product 5 formed between the cavity part 3 and the core part 4 is formed by a long neck part 5 that is long in the depth direction of the fixed mold 1.
a, which makes it difficult to leave the mobile type 2. 6 is a spool pusher which serves as a passage for the molten resin. 7 is an ejector plate provided in the space 8 of the movable mold 2 so as to be able to reciprocate in parallel to the mold opening direction;
The first plate 7a and the second plate 7b are stacked so that they can be separated easily.
第１プレート７ａには、複数本のりターンピン９及びェ
ジェクタピン１０，１１を装着する。ェジェクタピン１
１はガイドスリーブ１２に猫動可能に封入されている。
ガイドスリーブ１２はエジエクタピン１０と同じように
第１プレート７ａに固着され、ェジェクタピン１０と同
じく移動型２を貫通する。ェジェクタピン１１は固定型
１に向かい、望遠鏡式にガイドスリーブ１２の中から進
出できるようになっており、ガイドスリーブ１２に封入
された圧縮コイルばね１３がこれを進出方向に附勢する
。ばね１３はェジェクタピン１１を、ピンの根元の径大
部がガイドスリーブ１２の先端の狭窄部に当たるところ
まで押し出す。ガイドスリーブ１２は成形品５に達する
高さを有し、ェジェクタピン１１は、型締め時には、固
定型１の突起１４によりガイドスリーブ１２と同じ高さ
にまで押し込められる。ェジェクタピン１１と成形品５
の間に引つかかりが生じるよう、突起１４の直径はェジ
ェクタピン１１の直径より小さくなっている。そして第
１プレート７ａと第２プレ−ト７ｂの間には、強力な圧
縮コイルばね１５が挿入されている。次に作用を説明す
る。A plurality of turn pins 9 and ejector pins 10 and 11 are attached to the first plate 7a. Ejector pin 1
1 is movably enclosed in a guide sleeve 12.
The guide sleeve 12 is fixed to the first plate 7a like the ejector pin 10, and passes through the movable mold 2 like the ejector pin 10. The ejector pin 11 faces the fixed mold 1 and can advance from inside the guide sleeve 12 in a telescopic manner, and a compression coil spring 13 enclosed in the guide sleeve 12 biases it in the advancing direction. The spring 13 pushes out the ejector pin 11 to the point where the large diameter portion at the root of the pin hits the narrowed portion at the tip of the guide sleeve 12. The guide sleeve 12 has a height that reaches the molded product 5, and the ejector pin 11 is pushed into the same height as the guide sleeve 12 by the protrusion 14 of the fixed mold 1 during mold clamping. Ejector pin 11 and molded product 5
The diameter of the protrusion 14 is smaller than the diameter of the ejector pin 11 so that a catch occurs between the ejector pins 11 and 11. A strong compression coil spring 15 is inserted between the first plate 7a and the second plate 7b. Next, the action will be explained.
第１図の型締め状態ではリターンピン９が固定型１に当
たって、ェジェクタプレート７は空間８の内壁に押付け
られている。またェジェクタピン１１は固定型１の突起
１４により非進出位置に押し込められている。ここで射
出成形を行う。次いで第２図の如く型開きを開始するの
であるが、図のような形状の成形品５は、移動型２から
の離型抵抗ばかりでなく、固定型１からの離型抵抗もま
た大きい。その大なる滋型抵抗（固定型１からの）に加
え、リターンピン９が固定型１から離れるや否や、ばね
１５の強大な反発力が第１プレート７ａに作用し、成形
品５は移動型２から少し浮き上る。ばね１５の伸張スト
ロークは小さいので、成形品５は移動型２から完全に剥
離はせず、移動型２に従い固定型１から引き出される。
移動型２が移動ストロークの終点近くに達すると、第３
図の如くェジェクトロツド１６が第２プレート７ｂに当
たり、このプレートを第１プレート７ａ諸共固定型１の
方へ押し出す。これによりェジェクタピン１０，１１は
移動型２から大きく伸び出し、概に離型抵抗が軽減され
ている成形品５を突き出す。ェジェクタピン１０は第１
プレート７ａが空間８の内壁に当たって止まると進出を
停止するが、ェジェクタピン１１はガイドスリーブ１２
に対しなおも相対的移動を続け、成形品５を移動型２か
ら完全に突き外すものである。以上のように本発明では
、ェジェクタプレートにより移動せしめられるガイドス
リーブに、望遠鏡式に進出可能なェジェクタピンと、こ
のェジェクタピンを進出方向に附勢するばねとを封入し
たものであるから、ヱジェクタプレートの移動距離に、
ガイドスリーブに対するェジェクタピンの相対移動距離
を加えたものが突き出しストロークということになり、
大きな突き出しストロークを、金型を大型化することな
く得ることができる。In the mold clamping state shown in FIG. 1, the return pin 9 hits the fixed mold 1, and the ejector plate 7 is pressed against the inner wall of the space 8. Further, the ejector pin 11 is pushed into a non-advanced position by a protrusion 14 of the fixed mold 1. Injection molding is performed here. Next, the mold opening is started as shown in FIG. 2, but the molded product 5 having the shape shown in the figure has a large mold release resistance not only from the movable mold 2 but also from the fixed mold 1. In addition to the large resistance (from the fixed mold 1), as soon as the return pin 9 separates from the fixed mold 1, a strong repulsive force of the spring 15 acts on the first plate 7a, and the molded product 5 is moved from the movable mold. It rises a little from 2. Since the extension stroke of the spring 15 is small, the molded part 5 is not completely peeled off from the movable mold 2, but is pulled out from the fixed mold 1 along with the movable mold 2.
When moving die 2 reaches near the end of its moving stroke, the third
As shown in the figure, the ejector rod 16 hits the second plate 7b and pushes this plate together with the first plate 7a toward the fixed mold 1. As a result, the ejector pins 10 and 11 greatly extend from the movable mold 2, and eject the molded product 5 whose mold release resistance is generally reduced. The ejector pin 10 is the first
When the plate 7a hits the inner wall of the space 8 and stops advancing, the ejector pin 11 stops moving forward.
The molded product 5 is completely pushed out of the movable mold 2 by continuing to move relative to the movable mold 2. As described above, in the present invention, the ejector pin that can be advanced in a telescopic manner and the spring that biases the ejector pin in the advancing direction are enclosed in the guide sleeve that is moved by the ejector plate. The distance traveled by
The ejection stroke is the sum of the relative movement distance of the ejector pin with respect to the guide sleeve.
A large ejection stroke can be obtained without increasing the size of the mold.
図は本発明金型の一実施例を示し、第１図は型締め時、
第２図は型開き開始時、第３図は型開き終了時の、それ
ぞれ断面図を示す。
１・・・固定型、２・・・移動型、５・・・成形品、７
・・・ェジエクタプレート、１０，１１…エジエクタピ
ン、１２…ガイドスリーブ、１３…ばね、１４…突起。
第１図第２図
第３図The figure shows an embodiment of the mold according to the present invention, and FIG. 1 shows when the mold is clamped,
FIG. 2 shows a cross-sectional view at the start of mold opening, and FIG. 3 shows a cross-sectional view at the end of mold opening. 1... Fixed type, 2... Movable type, 5... Molded product, 7
... Ejector plate, 10, 11... Ejector pin, 12... Guide sleeve, 13... Spring, 14... Projection. Figure 1 Figure 2 Figure 3
Claims (1)
クタピンの如くガイドスリープを固着し、このガイドス
リーブ内には、成形品に向かつて望遠鏡式に進出可能な
エジエクタピン及びこのエジエクタピンを進出方向に附
勢するばねを封入すると共に、固定型には、型締め時、
前記ガイドスリーブ内のエジエクタピンを非進出位置に
押し込む突起を形設してなる射出成形金型。1. A guide sleeve is fixed like a normal ejector pin to the ejector plate provided on the movable type, and within this guide sleeve is an ejector pin that can be advanced telescopically toward the molded product, and this ejector pin is energized in the advancing direction. In addition to enclosing a spring, the fixed mold also contains a spring when the mold is clamped.
An injection mold formed with a protrusion that pushes the ejector pin in the guide sleeve to a non-extended position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12979781A JPS6023969B2 (en) | 1981-08-18 | 1981-08-18 | injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12979781A JPS6023969B2 (en) | 1981-08-18 | 1981-08-18 | injection mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5831727A JPS5831727A (en) | 1983-02-24 |
| JPS6023969B2 true JPS6023969B2 (en) | 1985-06-10 |
Family
ID=15018462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12979781A Expired JPS6023969B2 (en) | 1981-08-18 | 1981-08-18 | injection mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6023969B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62189118U (en) * | 1986-05-22 | 1987-12-02 | ||
| JPH0529855Y2 (en) * | 1987-09-10 | 1993-07-30 | ||
| JPH0524506Y2 (en) * | 1988-11-07 | 1993-06-22 | ||
| JP2726400B2 (en) * | 1995-09-25 | 1998-03-11 | 株式会社型システム | Injection mold |
| CN102049824B (en) * | 2009-11-06 | 2013-05-15 | 福州蓝卡潞工业有限公司 | Synchronous subsection ejection device for die |
-
1981
- 1981-08-18 JP JP12979781A patent/JPS6023969B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5831727A (en) | 1983-02-24 |
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