JP3922791B2 - Clamping method for injection mold - Google Patents

Clamping method for injection mold Download PDF

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Publication number
JP3922791B2
JP3922791B2 JP06751698A JP6751698A JP3922791B2 JP 3922791 B2 JP3922791 B2 JP 3922791B2 JP 06751698 A JP06751698 A JP 06751698A JP 6751698 A JP6751698 A JP 6751698A JP 3922791 B2 JP3922791 B2 JP 3922791B2
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JP
Japan
Prior art keywords
mold
arm
plate
fixed
tip
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
JP06751698A
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Japanese (ja)
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JPH11262942A (en
Inventor
正志 徳森
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.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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 Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to JP06751698A priority Critical patent/JP3922791B2/en
Publication of JPH11262942A publication Critical patent/JPH11262942A/en
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Description

【0001】
【発明の属する技術分野】
本発明は射出成形金型に関するものである。
【0002】
【従来の技術】
図3に一般的な3プレートタイプの射出成形金型を示す。
6は固定側取付板、7はランナー払い板、8は固定側型板、9は可動側、10はガイドピン、11はガイドブッシュである。
【0003】
以上のように構成された3プレート金型では、型締め工程でガイドピン10がガイドブッシュ11に入り、この2部品10,11に案内されて固定側型板8と可動側9は閉じる。
【0004】
【発明が解決しようとする課題】
しかしながら上記の構成では、滑らかに型締めさせるために図4に示すようにガイドピン10とガイドブッシュ11の間にクリアランス(D−d)を設けており、このクリアランスの分だけ可動側型板と固定側型板が傾く問題点を有している。
【0005】
またこの角度を小さくするために、ガイドピンとガイドブッシュのクリアランスを小さくすると滑らかに型締めできない、無理に型締めを行うとガイドピンとガイドブッシュが焼き付くなどの問題を発生している。
【0006】
本発明は、ガイドピンとガイドブッシュのクリアランスを小さくする事なく、型板の傾きを防止できる射出成形金型用型締め方法を提供することを目的とする。
【0007】
【課題を解決するための手段】
本発明の技術的手段は、型締め工程時に固定側取付板と固定側型板をアームにより拘束し、固定側型板が傾くことを防止するものである。
【0009】
【発明の実施の形態】
本発明の射出成形金型用型締め方法は、射出成形に際して固定側型板に対して可動側型板が近接して金型を型締めする射出成形金型用型締め方法であって、型締め工程の途中段階までは、可動側金型と対向する金型に基端部が回動可能に支持され付勢手段によって付勢されたアームの先端を、前記固定側型板に当接させて前記固定側型板の型締め方向と平行な面を拘束し、型締め工程の途中段階では、前記可動側型板に取り付けられたリリースバーの先端に形成された傾斜部に、前記アームの先端に設けられた突起が乗り上げることで、前記アームを前記付勢に抗して押し上げて前記アームによる前記固定側型板の型締め方向と平行な面の前記拘束を解除し、その後に前記固定側型板の型締め方向と平行な面を前記リリースバーで拘束して型締めすることを特徴とする。
【0010】
この構成によると、金型全開時に前記付勢手段の作用によりアームの突起が固定側型板のランナーパート側に入り込み、そのままの状態で型締めを行うため、固定側型板は摺動抵抗などにより傾こうとしてもアームが背後で突っ張って拘束しているため傾くことができない。このまま型締めを行い製品パートが閉じる直前にリリースバーがアームを持ち上げて固定側型板からアームを外すことで、残りのランナーパートが閉じられるようになり型締めを完了する。
【0011】
以下、本発明の実施の形態を図1と図2に基づいて説明する。
(実施の形態1)
図2(a)(b)は金型全開状態を示し、図1(a)(b)は金型型締め工程の途中段階で製品パートが閉じる直前の状態を示している。
【0012】
図2においてアーム1の基端部は金型に軸2で回動可能に支持されており、付勢手段としてのスプリング3によりアーム1の先端部を固定側型板4に押し付けられ、アーム1の内側についている突起1aが固定側型板4の型締め方向と平行な面に当接している。アーム1の先端部には横方向に突出したピン1bが設けられている。
【0013】
金型の可動側9にはリリースバー5が前記アーム1に対応して取り付けられている。リリースバー5の先端には、傾斜部5aが形成されている。
なお、図1と図2ではアーム1とリリースバー5のペアーが1組だけしか図示されていないが、実際には金型の2ヵ所以上に複数組のアーム1とリリースバー5のペアーが取り付けられている。
【0014】
この図2(a)(b)に示す状態で型締め工程に入るので、固定側型板4はアーム1により拘束され傾くことなく製品パートが以下のように閉じていく。型締め工程の途中段階では図1(a)(b)に示すように、各アーム1の先端部のピン1bが対向するリリースバー5の傾斜部5aに乗り上げて各アーム1がスプリング3の付勢に抗して押し上げられ、これによってアーム1の突起1aと固定側型板4の型締め方向と平行な面との当接が解除されて固定側型板4の拘束が解除され、これにより製品パートに続いてランナーパートを閉じることができ型締めを完了する。
【0015】
なお、上記の実施の形態では、付勢手段としてスプリングを使用したが、ゴム等のその他の弾性体を用いて構成することもできる。
【0016】
【発明の効果】
以上のように本発明によれば、射出成形に際して固定側型板に対して可動側型板が近接して金型を型締めする射出成形金型用型締め方法であって、型締め工程の途中段階までは、可動側金型と対向する金型に基端部が回動可能に支持され付勢手段によって付勢されたアームの先端を、前記固定側型板に当接させて前記固定側型板の型締め方向と平行な面を拘束し、型締め工程の途中段階では、前記可動側型板に取り付けられたリリースバーの先端に形成された傾斜部に、前記アームの先端に設けられた突起が乗り上げることで、前記アームを前記付勢に抗して押し上げて前記アームによる前記固定側型板の型締め方向と平行な面の前記拘束を解除し、その後に前記固定側型板の型締め方向と平行な面を前記リリースバーで拘束して型締めするので、ガイドピンとガイドブッシュのクリアランスを小さくする事なく、型板の傾きを防止することができ、製品設計の自由度が増すという効果が得られる。
【図面の簡単な説明】
【図1】本発明の射出成形金型用型締め装置の型締め工程の途中段階で製品パートが閉じる直前の側面図と平面図
【図2】本発明の射出成形金型用型締め装置の金型全開状態の側面図と平面図
【図3】一般的な3プレートタイプの射出成形金型構造を示す図
【図4】図3の要部の拡大図
【符号の説明】
1 アーム
1a 突起
1b ピン
2 軸
3 スプリング
4 固定側型板
5 リリースバー
5a 傾斜部
6 固定側取付板
7 ランナー払い板
8 固定側型板
9 可動側
10 ガイドピン
11 ガイドブッシュ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an injection mold.
[0002]
[Prior art]
FIG. 3 shows a general three-plate type injection mold.
Reference numeral 6 denotes a fixed side mounting plate, 7 denotes a runner wiping plate, 8 denotes a fixed side template, 9 denotes a movable side, 10 denotes a guide pin, and 11 denotes a guide bush.
[0003]
In the three-plate mold configured as described above, the guide pin 10 enters the guide bush 11 in the mold clamping process, and is guided by the two parts 10 and 11, and the fixed side mold plate 8 and the movable side 9 are closed.
[0004]
[Problems to be solved by the invention]
However, in the structure described above, are provided smoothly clearance between the guide pin 10 and the guide bush 11 as shown in FIG. 4 in order to cause clamping type (D-d), and an amount corresponding movable side mold plate of this clearance fixed die plate has a problem point rather tilted.
[0005]
Further, in order to reduce this angle, there is a problem that if the clearance between the guide pin and the guide bush is reduced, the mold cannot be clamped smoothly, and if the mold is forcibly clamped, the guide pin and the guide bush are seized.
[0006]
The present invention is not possible to reduce the clearance of the guide pin and guide bush, and to provide the inclination of the mold plate injection mold die clamping method that can be prevent.
[0007]
[Means for Solving the Problems]
The technical means of the present invention is to restrain the fixed-side mold plate from tilting by restraining the fixed-side mounting plate and the fixed-side mold plate with an arm during the mold clamping process.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A mold clamping method for an injection mold according to the present invention is a mold clamping method for an injection mold in which a movable side mold plate comes close to a fixed side mold plate during injection molding, and the mold is clamped. Until the middle stage of the tightening process, the tip of the arm whose base end is rotatably supported by the mold facing the movable mold and urged by the urging means is brought into contact with the fixed mold. The surface parallel to the mold clamping direction of the fixed side mold plate is restrained, and in the middle of the mold clamping process, the arm of the arm is attached to the inclined portion formed at the tip of the release bar attached to the movable side mold plate. The protrusion provided at the tip rides up to push up the arm against the urging to release the restraint of the plane parallel to the clamping direction of the fixed side template by the arm, and then the fixing Restrain the surface parallel to the clamping direction of the side mold plate with the release bar. And wherein the Mesuru.
[0010]
According to this configuration, when the mold is fully opened, the projection of the arm enters the runner part side of the fixed-side mold plate by the action of the biasing means, and the mold is clamped as it is. Even if it tries to tilt, it cannot tilt because the arm is stuck and restrained behind. The mold is clamped as it is, and the release bar lifts the arm just before the product part closes and removes the arm from the fixed side mold plate, so that the remaining runner part can be closed and the mold clamping is completed.
[0011]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.
(Embodiment 1)
2A and 2B show the mold fully opened state, and FIGS. 1A and 1B show the state immediately before the product part is closed in the middle of the mold clamping process.
[0012]
In FIG. 2, the base end portion of the arm 1 is rotatably supported on the mold by the shaft 2, and the distal end portion of the arm 1 is pressed against the fixed-side mold plate 4 by a spring 3 as an urging means. The protrusion 1a on the inner side of the fixed plate 4 is in contact with a surface parallel to the clamping direction of the fixed-side template 4. A pin 1b protruding in the lateral direction is provided at the tip of the arm 1.
[0013]
A release bar 5 is attached to the movable side 9 of the mold corresponding to the arm 1. An inclined portion 5 a is formed at the tip of the release bar 5.
Although only one pair of arm 1 and release bar 5 is shown in FIGS. 1 and 2, in reality, multiple pairs of arm 1 and release bar 5 are attached to two or more locations of the mold. It has been.
[0014]
Since the mold clamping process is started in the state shown in FIGS. 2A and 2B, the fixed side mold plate 4 is restrained by the arm 1 and the product part is closed as follows without being inclined. In the middle of the mold clamping process, as shown in FIGS. 1 (a) and 1 (b), the pin 1 b at the tip of each arm 1 rides on the inclined portion 5 a of the release bar 5 and each arm 1 is attached with a spring 3. As a result, the contact between the projection 1a of the arm 1 and the surface parallel to the clamping direction of the fixed-side template 4 is released, and the constraint on the fixed-side template 4 is released. The runner part can be closed following the product part to complete the mold clamping.
[0015]
In the above-described embodiment, the spring is used as the urging means, but it may be configured using other elastic bodies such as rubber.
[0016]
【The invention's effect】
As described above, according to the present invention, a mold clamping method for an injection mold in which a movable side mold plate is brought close to a fixed side mold plate during injection molding, and the mold is clamped. Up to the middle stage, the base end portion is rotatably supported by a mold facing the movable mold, and the distal end of the arm urged by the urging means is brought into contact with the fixed mold plate and fixed. A surface parallel to the mold clamping direction of the side mold plate is constrained, and in the middle of the mold clamping process, provided on the tip of the arm at an inclined portion formed at the tip of a release bar attached to the movable side mold plate. The raised protrusion rides up to push up the arm against the bias to release the restraint of the plane parallel to the clamping direction of the fixed-side template by the arm, and then the fixed-side template Clamp the surface parallel to the mold clamping direction with the release bar. In, without having to reduce the clearance of the guide pin and guide bush, it is possible to prevent the inclination of the mold plate, so that the flexibility of the product design is increased.
[Brief description of the drawings]
FIG. 1 is a side view and a plan view immediately before a product part is closed in the middle of a mold clamping process of an injection mold clamping device of the present invention. FIG. 2 is a schematic view of an injection mold clamping device of the present invention. Side view and plan view of the mold fully open [Fig. 3] Diagram showing a general three-plate type injection mold structure [Fig. 4] Enlarged view of the main part of Fig. 3 [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Arm 1a Protrusion 1b Pin 2 Axis 3 Spring 4 Fixed side template 5 Release bar 5a Inclined part 6 Fixed side mounting plate 7 Runner feeder plate 8 Fixed side template 9 Movable side 10 Guide pin 11 Guide bush

Claims (1)

射出成形に際して固定側型板(4)に対して可動側型板(9)が近接して金型を型締めする射出成形金型用型締め方法であって、
型締め工程の途中段階までは、可動側金型(9)と対向する金型(2)に基端部が回動可能に支持され付勢手段(3)によって付勢されたアーム(1)の先端を前記固定側型板(4)に当接させて前記固定側型板(4)の型締め方向と平行な面を拘束し、
型締め工程の途中段階では、前記可動側型板(9)に取り付けられたリリースバー(5)の先端に形成された傾斜部(5a)に、前記アーム(1)の先端に設けられた突起(1b)が乗り上げることで、前記アーム(1)を前記付勢に抗して押し上げて前記アーム(1)による前記固定側型板(4)の型締め方向と平行な面の前記拘束を解除し、その後に前記固定側型板(4)の型締め方向と平行な面を前記リリースバー(5)で拘束して型締めする
射出成形金型用型締め方法。
A mold clamping method for an injection mold in which a movable side mold plate (9) comes close to a fixed side mold plate (4) during injection molding to clamp the mold,
Until the middle of the mold clamping process, the arm (1) whose base end is rotatably supported by the mold (2) facing the movable mold (9) and is urged by the urging means (3 ). tip, restraining the clamping direction parallel to the surface of the fixed die plate is brought into contact with the fixed die plate (4) (4) of,
In the middle of the mold clamping process, a protrusion provided at the tip of the arm (1) on the inclined portion (5a) formed at the tip of the release bar (5) attached to the movable side mold (9). (1b) rides up, the arm (1) is pushed up against the urging force, and the restraint of the plane parallel to the clamping direction of the fixed side template (4) by the arm (1) is released. Then, a mold clamping method for injection molds in which a surface parallel to the mold clamping direction of the fixed side mold plate (4 ) is constrained by the release bar (5) and clamped.
JP06751698A 1998-03-18 1998-03-18 Clamping method for injection mold Expired - Lifetime JP3922791B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP06751698A JP3922791B2 (en) 1998-03-18 1998-03-18 Clamping method for injection mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP06751698A JP3922791B2 (en) 1998-03-18 1998-03-18 Clamping method for injection mold

Publications (2)

Publication Number Publication Date
JPH11262942A JPH11262942A (en) 1999-09-28
JP3922791B2 true JP3922791B2 (en) 2007-05-30

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Publication number Priority date Publication date Assignee Title
CN107116200B (en) * 2017-06-08 2023-02-24 佛山市南海奔达模具有限公司 Thimble board stop device and mould of using thereof
CN112222376B (en) * 2020-12-14 2021-03-09 宁波星源卓镁技术股份有限公司 Production mold for producing central control framework

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