JPH02120017A - Resin coated molding mold - Google Patents
Resin coated molding moldInfo
- Publication number
- JPH02120017A JPH02120017A JP27375388A JP27375388A JPH02120017A JP H02120017 A JPH02120017 A JP H02120017A JP 27375388 A JP27375388 A JP 27375388A JP 27375388 A JP27375388 A JP 27375388A JP H02120017 A JPH02120017 A JP H02120017A
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- layer
- coated
- skin layer
- friction coefficient
- 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
- 239000011347 resin Substances 0.000 title claims abstract description 13
- 229920005989 resin Polymers 0.000 title claims abstract description 13
- 238000000465 moulding Methods 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000004544 sputter deposition Methods 0.000 abstract description 2
- 239000010409 thin film Substances 0.000 abstract description 2
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000926 separation method Methods 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
- B29C45/26—Moulds
- B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はプラスチックを射出成形する成形金型の成形
サイクルを短縮させる構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure for shortening the molding cycle of a mold for injection molding plastics.
第３図は従来の一般的な射出成形金型の断面図で１図に
おいて、Ｉｌｌはキャビティ、１２１はキャビティ…内
の成形品を金型かも離型させるためのエジェクタピン、
１３１は凹形状部分を有する固定側型板、（４１は凸形
状部分を形成するコアブロック、−６１はコアブロック
（４１ヲ固定するコア固定板、（６）はＭ脂腸道のスプ
ール、１７）は樹脂湯道のランナ、（８）は梅脂充填後
逆流防止を行なうゲート、ｔ９１は成形品取り出しのた
めの分割面であるパーティングラインを示す。Figure 3 is a cross-sectional view of a conventional general injection mold. In Figure 1, Ill is a cavity, 121 is an ejector pin for releasing the molded product inside the cavity,
131 is a fixed side mold plate having a concave portion, (41 is a core block forming a convex portion, -61 is a core block (a core fixing plate for fixing 41), (6) is a spool for the M fatty intestinal tract, 17 ) indicates the runner of the resin runner, (8) indicates the gate that prevents backflow after filling with plum fat, and t91 indicates the parting line, which is the dividing surface for taking out the molded product.
射出成形金型はスプール１Ｂ）の湯道を通りランナー１
７）およびゲート（８）を通過した溶融された樹脂が、
所望形状を有するキャビティ…内に入り固化した後、パ
ーティングライン（９１にて成形金型が分割し、エジェ
クタピン（２）により成形品を突き出し離型される。The injection mold passes through the runner of spool 1B) to runner 1.
7) and the molten resin that passed through the gate (8),
After entering a cavity having a desired shape and solidifying, the mold is divided at a parting line (91), and the molded product is ejected by an ejector pin (2) and released from the mold.
従来の金属表面からなる成形金型は以上のように構成さ
れていたので、成形品−？を取り出しが主体であるため
離型に必要な抜き勾配を最小にするには限度がありまた
、キャビティ部の表面仕上り状態が離型不良の原因にも
なシ成形品のデザインの制約・加工時間の増大、成形サ
イクルの増大になる等の問題点があった。Conventional molding dies with metal surfaces were constructed as described above, so molded products -? There is a limit to minimizing the draft angle required for mold release, and the surface finish of the cavity may also be the cause of poor mold release, resulting in constraints on the design of the molded product and processing time. There were problems such as an increase in the amount of heat and an increase in the molding cycle.
この発明は上記のような問題点を解消するためになされ
たもので、キャビティ部の表面およびエジェクタピンの
表面に摩擦係数の小さな樹脂スキン層を形成せしめ成形
サイクルの短縮を図ることを目的とする。This invention was made to solve the above problems, and aims to shorten the molding cycle by forming a resin skin layer with a small friction coefficient on the surface of the cavity part and the surface of the ejector pin. .
この発明ＶＣ係る成形金型はキャビティ部の表面および
エジェクタピンの表面に、例えば四弗化エチレン等の摩
擦係数の小さい樹脂をコーティングし、成形品の離ｍを
容易にしたものである。In the molding die according to the VC of the present invention, the surface of the cavity and the surface of the ejector pin are coated with a resin having a small coefficient of friction, such as tetrafluoroethylene, to facilitate separation of the molded product.
この発明における樹脂コーティング成形金型は摩擦係数
の小さいキャビティ部が得られるので、成形品抜き勾配
は最小にすることができしかも高離型性が得られる。Since the resin-coated mold according to the present invention provides a cavity portion with a small coefficient of friction, the draft angle of the molded product can be minimized and high mold releasability can be obtained.
以下、この発明の一実！ ｇＡＪを図について説明する
。第１図、第２図において、（Ｉｏａ）は固定Ｉｊｌ１
１ 型板（３１のキャビティ＋１１の内面にコーティン
グされた四弗化エチレン層、（ｌ ｌ）はコアブロック
１４１のキャビティ１！１の表面にコーティングされた
四弗化エチレン層、Ｎ０Ｃ）Ｖ′ｉエジェクタピン２１
の外面にコーティングされた四弗化エチレン層で、いづ
れも圏脂スキン層を形成されている。Below is the fruit of this invention! gAJ will be explained with reference to the diagram. In Figures 1 and 2, (Ioa) is fixed Ijl1
1 Template (Tetrafluoroethylene layer coated on the inner surface of cavity 31 + 11, (l l) is the tetrafluoroethylene layer coated on the surface of cavity 1!1 of core block 141, N0C) V'i Ejector pin 21
A layer of tetrafluoroethylene is coated on the outer surface of the membrane, forming a blister skin layer.
なお、上記実覧例では樹脂スキン１−は四弗化エチレン
層の場合を示したが、摩擦係数が小さいものであればよ
く、例えばスパッタリングによりＴｉＮ等の薄膜層を形
成しても同様の効果を奏する。In addition, in the above example, the resin skin 1- is a tetrafluoroethylene layer, but any material with a small friction coefficient may be used. For example, a thin film layer of TiN or the like may be formed by sputtering to obtain the same effect. play.
以上のようにこの発明によれば、キャビティ内面に、低
摩擦係数のスキン層を形成したので高離型性が得られ、
よっておのずと、成形品の抜き勾配減少に伴うデザイン
の制限の解消、あるいは、成形サイクルの短縮が可能と
なる効果が得られる。As described above, according to the present invention, since a skin layer with a low coefficient of friction is formed on the inner surface of the cavity, high mold releasability can be obtained.
Therefore, it is naturally possible to eliminate design limitations associated with a reduction in the draft angle of a molded product, or to shorten the molding cycle.
＄１図はこの発明の一実施例ＶＣよる樹脂コーティング
成形金型の断面図、第２図ｒｌ′ｉ第１図の要部拡大断
面図、第８図は従来の成形金をの断面図である。図にお
いて、（１０ａ）〜（ＩＯＣ） ｉｊ四弗化エチレン層
を示す。
なお、図中、同一符号＃：を四−１または相当部分を示
す。Figure 1 is a cross-sectional view of a resin coating mold according to VC according to an embodiment of the present invention, Figure 2 is an enlarged cross-sectional view of the main part of Figure 1, and Figure 8 is a cross-sectional view of a conventional molding die. be. In the figure, (10a) to (IOC) ij tetrafluoroethylene layers are shown. In addition, in the figure, the same symbol #: indicates 4-1 or a corresponding part.
Claims (1)
面に低摩擦係数の樹脂スキン層を形成した事を特徴とす
る樹脂コーティング成形金型。A resin-coated mold for molding plastic, characterized by forming a resin skin layer with a low coefficient of friction on the inner surface of the metal cavity of the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27375388A JPH02120017A (en) | 1988-10-28 | 1988-10-28 | Resin coated molding mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27375388A JPH02120017A (en) | 1988-10-28 | 1988-10-28 | Resin coated molding mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02120017A true JPH02120017A (en) | 1990-05-08 |
Family
ID=17532097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27375388A Pending JPH02120017A (en) | 1988-10-28 | 1988-10-28 | Resin coated molding mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02120017A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021734A1 (en) * | 1994-02-09 | 1995-08-17 | Tetra Laval Holdings & Finance S.A. | Gluable plastic moulded part and process for producing the same |
| WO2000051805A1 (en) * | 1999-03-02 | 2000-09-08 | Feinwerktechnik Wetzlar Gmbh | Injection moulding device and method for preparing precision-optical and precision-mechanical parts from a thermoplastic |
-
1988
- 1988-10-28 JP JP27375388A patent/JPH02120017A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021734A1 (en) * | 1994-02-09 | 1995-08-17 | Tetra Laval Holdings & Finance S.A. | Gluable plastic moulded part and process for producing the same |
| WO2000051805A1 (en) * | 1999-03-02 | 2000-09-08 | Feinwerktechnik Wetzlar Gmbh | Injection moulding device and method for preparing precision-optical and precision-mechanical parts from a thermoplastic |
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