JPH0366715U

JPH0366715U -

Info

Publication number: JPH0366715U
Application number: JP12742389U
Authority: JP
Priority date: 1989-10-31
Filing date: 1989-10-31
Publication date: 1991-06-28

Description

[Brief explanation of the drawing]

第１図及び第２図は、本考案に係るホツトラン
ナ金型の内圧抜き機構の一実施例を示す図面であ
り、第１図はマニホールド内の圧力を降下させた
ときの状態を示す射出成形機の要部拡大断面図、
第２図は射出成形機の全体を示す正面図である。
第３図ａ、第３図ｂ、及び第３図ｃは、従来のホ
ツトランナ金型の内圧抜き機構を示す断面図であ
り、第３図ａはシリンダノズルタイプのホツトラ
ンナ金型内圧抜き機構を示す要部断面図、第３図
ｂはニードル弁タイプのホツトランナ金型内圧抜
き機構を示す要部断面図、第３図ｃはボールタイ
プのホツトランナ金型内圧抜き機構を示す要部断
面図である。１６……金型、１７……ノズル、１７ａ……ピ
ストン部、１７ｂ……端面、１８……スプールブ
ツシユ、１８ｂ……シリンダ部、１８ｃ……段差
面、２０……マニホールド。 1 and 2 are drawings showing an embodiment of the internal pressure relief mechanism of the hot runner mold according to the present invention, and FIG. 1 shows the state of the injection molding machine when the pressure inside the manifold is reduced. An enlarged cross-sectional view of the main parts of
FIG. 2 is a front view showing the entire injection molding machine.
Figures 3a, 3b, and 3c are cross-sectional views showing the internal pressure relief mechanism of a conventional hot runner mold, and Figure 3a shows a cylinder nozzle type hot runner mold internal pressure relief mechanism. FIG. 3B is a sectional view of a main part showing a needle valve type hot runner mold internal pressure releasing mechanism, and FIG. 3C is a main part sectional view showing a ball type hot runner mold internal pressure releasing mechanism. 16... Mold, 17... Nozzle, 17a... Piston part, 17b... End face, 18... Spool bush, 18b... Cylinder part, 18c... Step surface, 20... Manifold.

Claims

[Scope of utility model registration request]

The outer diameter of the tip part is made thinner, and the piston part has an extended piston part, and the end surface of the piston part is formed into a spherical shape, so that the nozzle can move forward and backward, and the piston part of the nozzle is fitted into the piston part. 1. An internal pressure relief mechanism for a hot runner mold, comprising: a spool bushing having a cylinder portion having a step surface that matches an end surface.