JPH0890615A - Injection molding die - Google Patents

Injection molding die

Info

Publication number
JPH0890615A
JPH0890615A JP23123994A JP23123994A JPH0890615A JP H0890615 A JPH0890615 A JP H0890615A JP 23123994 A JP23123994 A JP 23123994A JP 23123994 A JP23123994 A JP 23123994A JP H0890615 A JPH0890615 A JP H0890615A
Authority
JP
Japan
Prior art keywords
movable
insert
mold
sleeve pin
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.)
Pending
Application number
JP23123994A
Other languages
Japanese (ja)
Inventor
Shin Ihara
慎 井原
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP23123994A priority Critical patent/JPH0890615A/en
Publication of JPH0890615A publication Critical patent/JPH0890615A/en
Pending legal-status Critical Current

Links

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  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

PURPOSE: To obtain an injection molding die for molding a satisfactory molded article free from a molding defect, such as sinkmark, by a method wherein a cooling pipe of a movable retainer plate is provided just below a sleeve pin to cool a mold rapidly and uniformly. CONSTITUTION: In an injection molding die consisting of a movable mold and a stationary mold, a movable retainer plate 2 having an L-shaped cross section is provided on the movable mold. A first movable insert 31 for forming a cavity is provided on the top of the movable retainer plate 2. A second movable insert 32 is provided in a space between the first movable insert 31 and the movable retainer plate 2 so as to abut on the movable retainer plate 2. Furthermore, a pushing mold 41 of an L-shaped cross section pushing a sleeve pin 6 is provided so as to be projected from an ejector plate 5 toward the first movable insert 31. The sleeve pin 6 and a pin insert 7 are respectively fitted into the pushing mold 41 and the second movable insert 32. A cooling pipe 8 of the movable retainer plate 2 is provided just below the sleeve pin 6.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、射出成形金型、特に成
形品を押し出すスリーブピンが設けられた射出成形金型
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection mold, and more particularly to an injection mold provided with a sleeve pin for extruding a molded product.

【0002】[0002]

【従来の技術】従来、成形品を押し出して金型より離型
させるために可動型側に設けられるスリーブピンは、通
常、可動側型板と可動側取付板の間に設けられた第一突
上板と第二突上板の間に嵌合して設けられている(特開
平1−180315号公報参照)。
2. Description of the Related Art Conventionally, a sleeve pin provided on a movable mold side for extruding a molded product and releasing it from a mold is usually a first protrusion plate provided between a movable mold plate and a movable mounting plate. And the second protrusion plate are provided so as to be fitted to each other (see JP-A-1-180315).

【0003】上記従来のスリーブピンが設けられた射出
成形金型に関し、図面を参照して具体的に以下に説明す
る。図3において、スリーブピン100は、固定側型板
200と可動側型板300とが設けられた射出成形金型
の可動側型板300の外側に当接して設けられた第一突
上板501と第二突上板502の第一突上板501の嵌
合孔にその固定座が嵌合されて固定されて設けられてい
る。又、スリーブピン100の中心部には、ピン入子6
00が可動取付板400に固定されて摺動可能に挿入さ
れている。
The injection molding die provided with the conventional sleeve pin will be specifically described below with reference to the drawings. In FIG. 3, the sleeve pin 100 is provided with a first protrusion plate 501 provided in contact with the outside of the movable side mold plate 300 of the injection molding die in which the fixed side mold plate 200 and the movable side mold plate 300 are provided. The fixing seat is fitted and fixed in the fitting hole of the first protrusion plate 501 of the second protrusion plate 502. In addition, the pin insert 6 is provided at the center of the sleeve pin 100.
00 is fixed to the movable mounting plate 400 and slidably inserted.

【0004】700は可動側型板300にスリーブピン
100と交差する方向に設けられた冷却管であるが、こ
の冷却管700はスリーブピン100との衝突を避け、
止むを得ずスリーブピン100を挟んで、スリーブピン
100の両側の逃げた位置に配設されている。
Reference numeral 700 denotes a cooling pipe provided on the movable side mold plate 300 in a direction intersecting with the sleeve pin 100. The cooling pipe 700 avoids collision with the sleeve pin 100.
The sleeve pin 100 is unavoidably sandwiched between the sleeve pin 100 and the sleeve pin 100, and the sleeve pin 100 is disposed at an escape position on both sides.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、上記従
来のスリーブピンが設けられた射出成形金型において
は、スリーブピン100が邪魔をしてスリーブピン10
0の真下に、冷却管700を配置することができないた
め止むを得ず避けた位置に配置されている。従って、ス
リーブピン100がある箇所は冷却管700が通ってい
ないため、冷却ができなかったり、冷却が不足し、必要
以上の冷却時間を要して生産性が悪くなったり、又、冷
却むらによる所謂ヒケの発生のため成形不良の原因とな
るなどの問題があった。
However, in the injection molding die provided with the above-mentioned conventional sleeve pin, the sleeve pin 100 interferes with the sleeve pin 10.
Since the cooling pipe 700 cannot be arranged directly below 0, it is unavoidably arranged at a position avoided. Therefore, since the cooling pipe 700 does not pass through the portion where the sleeve pin 100 is present, cooling cannot be performed, or the cooling is insufficient, which requires a longer cooling time than necessary, resulting in poor productivity and uneven cooling. There is a problem that so-called sink marks are generated, which causes defective molding.

【0006】本発明は、上記のこのような問題点に着眼
してなされたものであり、その目的とするところは、こ
れらの問題点を解消し、可動側型板の冷却管をスリーブ
ピンの真下に設けて、金型の冷却を迅速、且つ、均一に
行うことにより、ヒケ等の成形不良がない良好な成形品
が得られる射出成形金型を提供するものである。
The present invention has been made in view of the above problems, and an object of the present invention is to solve these problems and to install a cooling pipe of a movable side mold plate in a sleeve pin. (EN) An injection-molding die which is provided directly below to cool a die rapidly and uniformly so that a good molded article free from molding defects such as sink marks can be obtained.

【0007】[0007]

【課題を解決するための手段】本発明の射出成形金型の
においては、可動型と固定型よりなる射出成形金型にお
いて、可動型に断面形状がL型状の可動側型板が設けら
れ、この可動側型板の先端側にキャビティを形成する第
一可動側入子と、この第一可動側入子と可動側型板との
間の空所に第二可動側入子が可動側型板に当接して設け
られ、更に、断面形状がL型状のスリーブピンの押出し
型が突出板より第一可動側入子側に突き出して設けら
れ、この押出し型にスリーブピンと、上記第二可動側入
子にピン入子とが嵌合されて設けられ、可動側型板の冷
却管がスリーブピンの真下に設けられていることを特徴
とする。
In the injection mold of the present invention, in the injection mold comprising a movable mold and a fixed mold, the movable mold is provided with a movable side mold plate having an L-shaped cross section. , A first movable side insert forming a cavity on the tip side of the movable side mold plate, and a second movable side insert in the space between the first movable side insert and the movable side mold plate. An extrusion die of a sleeve pin having an L-shaped cross section is provided so as to abut the die plate, and the extrusion die is provided so as to protrude from the protruding plate toward the first movable side insert side. The sleeve pin and the second die are provided on the extrusion die. The movable side insert is fitted with the pin insert, and the cooling pipe of the movable side mold plate is provided directly below the sleeve pin.

【0008】[0008]

【作用】本発明の射出成形金型のにおいては、可動型の
可動側型板に第二可動側入子と、突出板に押出し型とが
設けられ、この第二可動側入子と押出し型とにスリーブ
ピン、及びピン入子が嵌合されて設けられていることに
より、可動側型板の冷却管をスリーブピンの真下に設け
ることができ、金型の冷却が迅速に、均一に行われるの
で、冷却不足による成形品のボス近傍等のヒケの発生が
防止され、成形不良のない良好な成形品が得られる。
In the injection molding die of the present invention, the movable mold plate of the movable mold is provided with the second movable mold insert and the projecting plate is provided with the extrusion mold. The second movable mold insert and the extrusion mold are provided. Since the sleeve pin and the pin insert are fitted in the and, the cooling pipe of the movable side mold plate can be provided directly under the sleeve pin, and the mold can be cooled quickly and uniformly. Therefore, the occurrence of sink marks near the boss of the molded product due to insufficient cooling is prevented, and a good molded product without molding defects can be obtained.

【0009】[0009]

【実施例】以下、本発明の実施例を図面を参照して説明
する。図1は、本発明の射出成形金型の一例を示す断面
図である。又、図2は、図1のA−A矢視図である。図
1において、成形品が成形されるキャビティは、固定側
型板1と、断面形状がL型状の可動側型板2の先端側に
設けられた第一可動側入子31とにより形成され、ボス
4aが設けられた成形品4が成形されるようになってい
る。上記第一可動側入子31と断面L型状の上記可動側
型板2の間に形成された空所に第二可動側入子32が設
けられている。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an example of an injection molding die of the present invention. 2 is a view taken along the line AA of FIG. In FIG. 1, a cavity in which a molded product is molded is formed by a fixed-side mold plate 1 and a first movable-side insert 31 provided on the tip side of a movable-side mold plate 2 having an L-shaped cross section. The molded product 4 provided with the boss 4a is molded. A second movable side insert 32 is provided in a space formed between the first movable side insert 31 and the movable side mold plate 2 having an L-shaped cross section.

【0010】更に、上記第二可動側入子32に上から被
さるようにして、断面形状がL型状のスリーブピンの押
出し型41と固定板42が第一突出板5にボルトにより
固定されて設けられている。上記固定板42には、スリ
ーブピン6が、下端の固定座6aを固定板42の裏側よ
り嵌合され、押出し型41と固定板42の間に固定板4
2側よりボルトにより締結、固定されて設けられてい
る。
Further, an extrusion die 41 of a sleeve pin having an L-shaped cross section and a fixing plate 42 are fixed to the first projecting plate 5 by bolts so as to cover the second movable side insert 32 from above. It is provided. The sleeve pin 6 is fitted to the fixed plate 42 at the lower end of the fixed seat 6a from the back side of the fixed plate 42, and the fixed plate 4 is provided between the extrusion die 41 and the fixed plate 42.
It is fastened and fixed with bolts from the 2 side.

【0011】7はピン入子であり、このピン入子7は、
スリーブピン6の中心部を貫通して設けられ、スリーブ
ピン6の先端は成形品4を形成するキャビティ面まで至
っている。又、ピン入子7は第二可動側入子32に設け
られた嵌合孔に下端の固定座7aを可動側型板2との間
に挟持されて固定されている。
7 is a pin insert, and this pin insert 7 is
It is provided so as to penetrate through the central portion of the sleeve pin 6, and the tip of the sleeve pin 6 reaches the cavity surface forming the molded product 4. Further, the pin insert 7 is fixed by sandwiching the fixed seat 7 a at the lower end between the pin insert 7 and the movable mold plate 2 in a fitting hole provided in the second movable insert 32.

【0012】8は冷却管であり、この冷却管8は可動側
型板2に設けられており、図2において示すように、ス
リーブピン6の真下であり、且つ、スリーブピン6と直
交する方向に穿設されている。
Reference numeral 8 denotes a cooling pipe. The cooling pipe 8 is provided on the movable side mold plate 2, and as shown in FIG. 2, is directly below the sleeve pin 6 and in a direction orthogonal to the sleeve pin 6. Has been drilled.

【0013】押出し型41が固定されている第一突出板
5の外側には第二突出板9と可動側取付板10とが設け
られ、型開き時にスリーブピン6をキャビティ側に押し
出すようになされている。
A second projecting plate 9 and a movable side mounting plate 10 are provided outside the first projecting plate 5 to which the extrusion die 41 is fixed, and the sleeve pin 6 is pushed out toward the cavity side when the die is opened. ing.

【0014】〔実施例の作用〕図1に示す型閉じの状態
から、溶融樹脂がキャビティへ射出、充填され、保圧が
完了すると、冷却が開始される。この冷却は、可動側型
板2に設けられた冷却管8に冷却水が供給されて行われ
る。従って、可動側型板2を始め、第二可動側入子3
2、ピン入子7、及びスリーブピン6等も効果的に冷却
される。
[Operation of Embodiment] When the molten resin is injected and filled into the cavity from the mold-closed state shown in FIG. 1 and cooling is completed, cooling is started. This cooling is performed by supplying cooling water to the cooling pipe 8 provided on the movable side mold plate 2. Therefore, starting from the movable side mold plate 2, the second movable side nest 3
2, the pin insert 7, the sleeve pin 6, etc. are also effectively cooled.

【0015】この冷却が完了し型開きが開始されと、押
出し型41が作動し始めて押出し型41の先端部に設け
られたスリーブピン6が前進して成形品4を押し出し始
め、第一可動側入子31より成形品4が離型されことに
なる。
When this cooling is completed and the mold opening is started, the extrusion die 41 starts to operate, the sleeve pin 6 provided at the tip end of the extrusion die 41 moves forward to start extruding the molded product 4, and the first movable side. The molded product 4 is released from the insert 31.

【0016】従来であれば、図3に示すようにスリーブ
ピン100が貫通する可動側型板300において、冷却
管700はスリーブピン100を避けた位置にしか配設
できなかったが、本実施例においては、可動側型板2の
先端側に第二可動側入子32を新設し、この第二可動側
入子32にスリーブピン6のピン入子7を設けることに
より、図1、或いは図2に示すように、可動側型板2の
スリーブピン6の真下に冷却管8を設けることが可能と
なった。従って、金型の冷却を迅速、且つ、均一に行う
ことが可能となった。
Conventionally, as shown in FIG. 3, in the movable side mold plate 300 through which the sleeve pin 100 penetrates, the cooling pipe 700 could be arranged only at a position avoiding the sleeve pin 100. 1, a second movable-side insert 32 is newly provided on the tip side of the movable-side mold plate 2, and the pin insert 7 of the sleeve pin 6 is provided on the second movable-side insert 32. As shown in FIG. 2, the cooling pipe 8 can be provided directly below the sleeve pin 6 of the movable mold plate 2. Therefore, the mold can be cooled quickly and uniformly.

【0017】[0017]

【発明の効果】本発明の射出成形金型のにおいては、可
動型の可動側型板に第二可動側入子と、突出板に押出し
型とが設けられ、この第二可動側入子と押出し型とにス
リーブピン、及びピン入子が嵌合されて設けられている
ことにより、可動側型板の冷却管をスリーブピンの真下
に設けることができ、金型の冷却が迅速に、均一に行わ
れるので、冷却不足による成形品のボス近傍等のヒケの
発生が防止され、成形不良のない良好な成形品が得られ
る。従って、スリーブピンを有する射出成形金型として
好適に用いられる。
In the injection molding die of the present invention, the movable movable mold plate of the movable mold is provided with the second movable mold insert, and the projecting plate is provided with the extrusion mold. Since the sleeve pin and the pin insert are fitted to the extrusion die, the cooling pipe of the movable side mold plate can be provided directly under the sleeve pin, and the die can be cooled quickly and uniformly. Therefore, the occurrence of sink marks in the vicinity of the boss of the molded product due to insufficient cooling is prevented, and a good molded product without molding defects can be obtained. Therefore, it is preferably used as an injection mold having a sleeve pin.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の射出成形金型の一例を示す断面図。FIG. 1 is a sectional view showing an example of an injection molding die of the present invention.

【図2】図1のA−A矢視図。FIG. 2 is a view on arrow AA of FIG.

【図3】スリーブピンが設けられた従来の射出成形金
型。
FIG. 3 is a conventional injection mold provided with a sleeve pin.

【符号の説明】[Explanation of symbols]

1 固定側型板 2 可動側型板 4 成形品 4a ボス 5 第一突出板 6 スリーブピン 6a、7a 固定座 7 ピン入子 8 冷却管 9 第二突出板 10 可動側取付板 31 第一可動側入子 32 第二可動側入子 41 押出し型 42 固定板 1 Fixed-side mold plate 2 Movable-side mold plate 4 Molded product 4a Boss 5 First protruding plate 6 Sleeve pins 6a, 7a Fixed seat 7 Pin insertion 8 Cooling pipe 9 Second protruding plate 10 Movable-side mounting plate 31 First movable side Nesting 32 Second movable-side nesting 41 Extrusion type 42 Fixed plate

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 可動型と固定型よりなる射出成形金型に
おいて、可動型に断面形状がL型状の可動側型板が設け
られ、この可動側型板の先端側にキャビティを形成する
第一可動側入子と、この第一可動側入子と可動側型板と
の間の空所に第二可動側入子が可動側型板に当接して設
けられ、更に、断面形状がL型状のスリーブピンの押出
し型が突出板より第一可動側入子側に突き出して設けら
れ、この押出し型にスリーブピンと、上記第二可動側入
子にピン入子とが嵌合されて設けられ、可動側型板の冷
却管がスリーブピンの真下に設けられていることを特徴
とする射出成形金型。
1. An injection molding die comprising a movable die and a fixed die, wherein the movable die is provided with a movable side template having an L-shaped cross section, and a cavity is formed at a tip side of the movable side template. The first movable side insert and the second movable side insert are provided in contact with the movable side mold plate in a space between the first movable side insert and the movable side mold plate. An extrusion die of a die-shaped sleeve pin is provided so as to project from the projecting plate toward the first movable side insert side, and the sleeve pin is fitted to this extrusion die and the pin insert is attached to the second movable side insert. The mold for injection molding is characterized in that the cooling pipe of the movable side mold plate is provided directly below the sleeve pin.
JP23123994A 1994-09-27 1994-09-27 Injection molding die Pending JPH0890615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23123994A JPH0890615A (en) 1994-09-27 1994-09-27 Injection molding die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23123994A JPH0890615A (en) 1994-09-27 1994-09-27 Injection molding die

Publications (1)

Publication Number Publication Date
JPH0890615A true JPH0890615A (en) 1996-04-09

Family

ID=16920507

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23123994A Pending JPH0890615A (en) 1994-09-27 1994-09-27 Injection molding die

Country Status (1)

Country Link
JP (1) JPH0890615A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006159750A (en) * 2004-12-09 2006-06-22 Fujinon Sano Kk Mold for injection molding and injection-molded article
CN107351332A (en) * 2017-07-28 2017-11-17 宇龙计算机通信科技(深圳)有限公司 It is a kind of to be used for the ejecting mechanism with column structure product
EP3167977A4 (en) * 2014-07-10 2018-03-07 Dong Keun Go Mold apparatus for molding metal in high vacuum environment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006159750A (en) * 2004-12-09 2006-06-22 Fujinon Sano Kk Mold for injection molding and injection-molded article
EP3167977A4 (en) * 2014-07-10 2018-03-07 Dong Keun Go Mold apparatus for molding metal in high vacuum environment
CN107351332A (en) * 2017-07-28 2017-11-17 宇龙计算机通信科技(深圳)有限公司 It is a kind of to be used for the ejecting mechanism with column structure product

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