JPH0282511U

JPH0282511U -

Info

Publication number: JPH0282511U
Application number: JP16206088U
Authority: JP
Priority date: 1988-12-14
Filing date: 1988-12-14
Publication date: 1990-06-26

Description

[Brief explanation of drawings]

第１図はこの考案に係る射出成形装置を示す要
部断面図、第２図乃至第５図はこの考案に係る射
出成形装置を用いた射出成形方法を説明するため
の説明図、第６図はこの考案に係る射出成形装置
の第２実施例を示す要部断面図、第７図は第６図
における射出成形装置の作用を説明するための説
明図、第８図はこの考案にかかる射出成形装置の
第３実施例を示す要部断面図、第９図は従来の射
出成形装置の示す要部断面図、第１０図は従来の
射出成形装置によつて形成された成形品を示す斜
視図、第１１図は従来の射出成形装置によつて形
成した成形品にウエルドが発生するときの状態を
説明するための説明図である。４……キヤビテイ、１，６……（固定）金型、
２……（可動）金型、３……ピン、６ａ……スラ
イド孔、５……受け部材。 FIG. 1 is a cross-sectional view of a main part showing an injection molding apparatus according to this invention, FIGS. 2 to 5 are explanatory diagrams for explaining an injection molding method using the injection molding apparatus according to this invention, and FIG. 6 7 is an explanatory diagram for explaining the operation of the injection molding device in FIG. 6, and FIG. FIG. 9 is a cross-sectional view of a main part showing a third embodiment of a molding device, FIG. 9 is a cross-sectional view of a main part of a conventional injection molding device, and FIG. 10 is a perspective view showing a molded product formed by a conventional injection molding device. 11A and 11B are explanatory diagrams for explaining a state in which a weld occurs in a molded product formed by a conventional injection molding apparatus. 4...Cavity, 1,6...(Fixed) mold,
2... (movable) mold, 3... pin, 6a... slide hole, 5... receiving member.

Claims

[Claims for Utility Model Registration] 1. An injection molding device comprising a pair of molds that form a cavity inside the molds when they are pressed together, and a pin that protrudes into the cavity and forms a hole in the molded product, comprising: An injection molding device characterized in that a pin is slidably attached to a mold in order to temporarily retract the pin from inside the mold. 2. A slide hole into which the tip of the pin is inserted is provided in the part facing the pin of the mold on which the pin is not attached, and a receiver is provided that can move forward and backward into the slide hole and is biased with elastic force in the forward direction. The injection molding apparatus according to claim 1, further comprising a member inserted therein. 3. The injection molding device according to claim 1 or 2, wherein the edge of the tip end of the pin is formed sharply so as to easily cut through the thermoplastic resin.