JPH04216027A - Injection molding die - Google Patents
Injection molding dieInfo
- Publication number
- JPH04216027A JPH04216027A JP40228190A JP40228190A JPH04216027A JP H04216027 A JPH04216027 A JP H04216027A JP 40228190 A JP40228190 A JP 40228190A JP 40228190 A JP40228190 A JP 40228190A JP H04216027 A JPH04216027 A JP H04216027A
- Authority
- JP
- Japan
- Prior art keywords
- pin
- mold
- molded product
- separated
- pin hole
- 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
Links
- 238000001746 injection moulding Methods 0.000 title description 2
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/5675—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding for making orifices in or through the moulded article
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、熱可塑性樹脂製品の射
出成形金型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection mold for thermoplastic resin products.
【０００２】0002
【従来の技術】この種の熱可塑性樹脂の射出成形品１が
、例えば図２にその平面図を示すように、実質的に平面
形で、かつ、その長手方向両端部にピン穴２を有するよ
うな形状である場合、従来はこのピン穴２形成用の一対
のピンが射出成形金型の離型面上に固定的に突設されて
いた。2. Description of the Related Art An injection molded article 1 made of thermoplastic resin of this type has a substantially planar shape and has pin holes 2 at both longitudinal ends thereof, as shown in a plan view in FIG. 2, for example. In the case of such a shape, conventionally, a pair of pins for forming the pin hole 2 were fixedly protruded from the mold release surface of the injection mold.
【０００３】0003
【発明が解決しようとする課題】しかしながら、これら
成形品１の長手方向寸法Ｌが例えば１５００ｍｍ以上等
と比較的大きい場合、成形１サイクルが完了して、前記
移動金型を固定金型に対して移動開放して成形品を離型
しようとするとき、成形品の冷却により、矢印で示すよ
うに長手方向に熱収縮を生じて一対のピン穴２が移動金
型の前記各ピンに喰付き拘束されて、成形品が自由に離
型し難い傾向を生ずる。このような場合、従来は金型開
放時に成形品を人力により叩くようにして離型させるよ
うにしていた。また、自動取出装置を使う場合にも、こ
の固着傾向があると人力の援助を要するため、自動化が
できないという問題点があった。[Problems to be Solved by the Invention] However, when the longitudinal dimension L of these molded products 1 is relatively large, for example, 1500 mm or more, it is difficult to move the movable mold relative to the fixed mold after one molding cycle is completed. When an attempt is made to release the molded product by opening the movable mold, as the molded product cools, thermal contraction occurs in the longitudinal direction as shown by the arrow, and the pair of pin holes 2 bite into each of the pins of the movable mold, restraining them. This tends to make it difficult for the molded product to release freely from the mold. In such cases, conventionally, when the mold is opened, the molded product is manually tapped to release it from the mold. Further, even when an automatic extraction device is used, there is a problem that automation is not possible because this tendency to stick requires manual assistance.
【０００４】本発明は、以上のような従来の問題点にか
んがみてなされたもので、金型開放時に人手を要するこ
となく成形品を自由に離型し得る手段の提供を目的とし
ている。The present invention has been made in view of the above-mentioned conventional problems, and aims to provide a means by which a molded product can be freely released from the mold without requiring manual labor when opening the mold.
【０００５】[0005]
【課題を解決するための手段】このため、本発明におい
ては、射出成形金型の離型面上に、成形製品のピン穴形
成用のピンを、前記金型の閉鎖及び解放動作に対応して
それぞれ出没するよう構成することにより、前記目的を
達成しようとするものである。[Means for Solving the Problems] Therefore, in the present invention, a pin for forming a pin hole in a molded product is provided on the release surface of an injection mold to correspond to the closing and opening operations of the mold. The purpose is to achieve the above objective by configuring the robot to appear and appear respectively.
【０００６】[0006]
【作用】以上のような出没形ピン構成により、金型開放
時にはばね力等により自動的にピンが離型面より引込む
ため、成形品のピン穴に拘束されることなく自由に放出
し得るようになり、自動取出しが可能となる。[Operation] With the above-mentioned retractable pin configuration, when the mold is opened, the pin automatically retracts from the mold release surface due to spring force, etc., so that it can be released freely without being restricted by the pin hole of the molded product. , and automatic ejection becomes possible.
【０００７】[0007]
【実施例】以下に、本発明を実施例に基づいて説明する
。図１に、本発明に係る金型要部の一例のそれぞれ金型
閉鎖時（ａ）と開放時（ｂ）の断面説明図を示す。
（構成）
（ａ）図において、３は固定金型、４は移動金型であり
、５は移動金型４の突出板、６は離型面を示す。７は、
成形品１のピン穴２を形成するためのピンで、長手方向
中央部にフランジ７ａを有する。このピン７は、移動金
型４の内部に凹設された円筒形凹所４ａ内を、離型面６
側の軸穴４ｂと、突出板５側にねじ嵌合された凹所４ａ
閉鎖用蓋部材８中央の軸穴８ａとに案内されて軸方向に
摺動して離型面６上にそれぞれ出没し得るよう構成され
ている。凹所４ａの底部と前記フランジ７ａ間には、圧
縮コイルばね９が配設されており、フランジ７ａ、すな
わちピン７を（ｂ）図に示すように離型面６から突出し
ないよう偏倚させている。
（作用）
金型閉鎖時においては、（ａ）図に示すように、ピン７
は、後方から突出板５が前進（矢印Ａ方向）することに
より突き出されてピン７の先端は固定金型３に突き当た
っており、キャビティ内に溶融樹脂が図示しないゲート
を経て注入され、成形品１が成形される。成形品１がキ
ャビティ内で冷却固化されると（ｂ）図のように、移動
金型４が固定金型３から離反後退し、突出板５が後方（
矢印Ｂ方向）に移動することにより、突出板５がピン７
の後端から離れ、ピン７は圧縮コイルばね９の復元力に
より後退し、成形品１のピン孔２から離脱するため、成
形品が冷却収縮を生じても、ピン穴２を拘束する怖れが
なくなる。なお、本実施例におけるピン７の出没機構や
弾性手段等は、図例のみに限定されるものでなく、種々
の変形であっても差支えないことはもちろんである。EXAMPLES The present invention will be explained below based on examples. FIG. 1 shows cross-sectional explanatory views of an example of the main part of a mold according to the present invention when the mold is closed (a) and when the mold is opened (b). (Structure) In the figure (a), 3 is a fixed mold, 4 is a movable mold, 5 is a protruding plate of the movable mold 4, and 6 is a mold release surface. 7 is
This is a pin for forming the pin hole 2 of the molded product 1, and has a flange 7a at the center in the longitudinal direction. This pin 7 moves the inside of the cylindrical recess 4a recessed inside the movable mold 4 into the mold release surface 6.
A shaft hole 4b on the side and a recess 4a fitted with a screw on the protruding plate 5 side.
It is configured so that it can slide in the axial direction while being guided by the shaft hole 8a at the center of the closing lid member 8 and can appear and retract on the mold release surface 6, respectively. A compression coil spring 9 is disposed between the bottom of the recess 4a and the flange 7a, and biases the flange 7a, that is, the pin 7, so as not to protrude from the mold release surface 6 as shown in FIG. There is. (Function) When the mold is closed, as shown in figure (a), pin 7
, the protruding plate 5 moves forward from the rear (in the direction of arrow A) and is protruded, and the tip of the pin 7 hits the fixed mold 3, and molten resin is injected into the cavity through a gate (not shown) to form the molded product. 1 is molded. When the molded product 1 is cooled and solidified in the cavity, the movable mold 4 moves backward away from the fixed mold 3, and the protruding plate 5 moves backward (
By moving in the direction of arrow B), the protruding plate 5 is moved toward the pin 7.
As the pin 7 separates from the rear end, it retreats due to the restoring force of the compression coil spring 9 and separates from the pin hole 2 of the molded product 1, so even if the molded product shrinks on cooling, there is no risk of restricting the pin hole 2. disappears. It should be noted that the mechanism for protruding and retracting the pin 7, the elastic means, etc. in this embodiment are not limited to those shown in the drawings, and may of course be modified in various ways.
【０００８】[0008]
【発明の効果】以上説明したように、本発明によれば、
成形品のピン穴形成用のピンを、金型の閉鎖及び開放動
作に対応してそれぞれ金型の離型面より出没可能に構成
したため、成形サイクル完了による金型開放時に、前記
ピン穴が前記ピンに拘束されることがなくなり、成形品
の自由離型が可能となり、人手を要することがなくなる
。[Effects of the Invention] As explained above, according to the present invention,
The pins for forming pin holes in the molded product are configured to be able to protrude and retract from the mold release surface in response to the closing and opening operations of the mold, so that when the mold is opened at the completion of the molding cycle, the pin holes are The molded product is no longer restricted by the pins and can be released freely, eliminating the need for manual labor.
【図１】この発明に係る射出成形金型の一例の要部断面
説明図。FIG. 1 is an explanatory cross-sectional view of a main part of an example of an injection molding mold according to the present invention.
【図２】射出成形品の一例の平面図。FIG. 2 is a plan view of an example of an injection molded product.
１ 射出成形品 ２ ピン穴 ３ 固定金型 ４ 移動金型 ５ 突出板 ６ 離型面 ７ ピン ９ 圧縮コイルばね 1 Injection molded products 2 Pin hole 3 Fixed mold 4. Moving mold 5 Protruding plate 6 Release surface 7 Pin 9 Compression coil spring
Claims (1)
のピン穴形成用のピンを、前記金型の閉鎖及び解放動作
に対応してそれぞれ出没するよう構成したことを特徴と
する射出成形金型。[Claim 1] A pin for forming a pin hole in a molded product is formed on a release surface of an injection mold so as to move in and out in response to closing and opening operations of the mold. Injection mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40228190A JPH04216027A (en) | 1990-12-14 | 1990-12-14 | Injection molding die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40228190A JPH04216027A (en) | 1990-12-14 | 1990-12-14 | Injection molding die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04216027A true JPH04216027A (en) | 1992-08-06 |
Family
ID=18512103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40228190A Pending JPH04216027A (en) | 1990-12-14 | 1990-12-14 | Injection molding die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04216027A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015186811A1 (en) * | 2014-06-06 | 2015-12-10 | 三菱化学株式会社 | Bearing member, end member, photoreceptor drum unit, developing roller unit, process cartridge, and method for manufacturing bearing member |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835976A (en) * | 1981-08-28 | 1983-03-02 | Hitachi Ltd | Insulated gate type field-effect semiconductor device and manufacture thereof |
| JPS6342825A (en) * | 1986-08-08 | 1988-02-24 | Nippon Plast Co Ltd | Mold device for molding hole of product |
-
1990
- 1990-12-14 JP JP40228190A patent/JPH04216027A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835976A (en) * | 1981-08-28 | 1983-03-02 | Hitachi Ltd | Insulated gate type field-effect semiconductor device and manufacture thereof |
| JPS6342825A (en) * | 1986-08-08 | 1988-02-24 | Nippon Plast Co Ltd | Mold device for molding hole of product |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015186811A1 (en) * | 2014-06-06 | 2015-12-10 | 三菱化学株式会社 | Bearing member, end member, photoreceptor drum unit, developing roller unit, process cartridge, and method for manufacturing bearing member |
| JP2015230468A (en) * | 2014-06-06 | 2015-12-21 | 三菱化学株式会社 | Bearing member, end part member, photoreceptor drum unit, developing roller unit, process cartridge and manufacturing method of bearing member |
| US10007223B2 (en) | 2014-06-06 | 2018-06-26 | Mitsubishi Chemical Corporation | Bearing member, end member, photoreceptor drum unit, developing roller unit, process cartridge, and manufacturing method of bearing member |
| US10203647B2 (en) | 2014-06-06 | 2019-02-12 | Mitsubishi Chemical Corporation | Bearing member, end member, photoreceptor drum unit, developing roller unit, process cartridge, and manufacturing method of bearing member |
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