JPS6368419U

JPS6368419U -

Info

Publication number: JPS6368419U
Application number: JP16271686U
Authority: JP
Priority date: 1986-10-23
Filing date: 1986-10-23
Publication date: 1988-05-09

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す射出成形金型
の要部断面図、第２図および第３図は第１図の作
動説明図、第４図は本考案の他の実施例を示す要
部断面図、第５図は第４図の作動説明図、第６図
は従来の成形型の断面図、第７図は第６図の型開
き時の断面図、第８図は成形品の要部斜視図であ
る。２……コアブロツク、４，５……エジエクタプ
レート、６……エジエクタピン、９……スライド
コア、１５……ロツクピン、２０……コイルスプ
リング、２１……エジエクタプレートカバー、２
５……ロツクピン、Ｃ……アンダーカツト部、Ｅ
……段状部、Ｗ……成形品。 Fig. 1 is a cross-sectional view of the main parts of an injection mold showing one embodiment of the present invention, Figs. 2 and 3 are explanatory diagrams of the operation of Fig. 1, and Fig. 4 shows another embodiment of the present invention. 5 is a sectional view of the main parts shown in FIG. 4, FIG. 6 is a sectional view of a conventional mold, FIG. 7 is a sectional view of the mold when the mold is opened in FIG. FIG. 3 is a perspective view of the main parts of the product. 2... Core block, 4, 5... Ejector plate, 6... Ejector pin, 9... Slide core, 15... Lock pin, 20... Coil spring, 21... Ejector plate cover, 2
5...Lock pin, C...Undercut part, E
...Stepped part, W... Molded product.

Claims

[Scope of utility model registration request]

In an injection mold that molds a long molded product with an undercut part, a lock pin is installed that engages with the stepped part of the molded product to prevent the molded product from shifting in the longitudinal direction when the molded product is taken out. The lock pin is provided on the ejector plate separately from the ejector pin, and the lock pin is slidably supported on the ejector plate so as to stop at a predetermined distance before the stroke limit position of the ejector pin when taking out the molded product. An injection molding die characterized in that the difference in stroke with the lock pin is set smaller than the depth of the step part.