JPH01156020U

JPH01156020U -

Info

Publication number: JPH01156020U
Application number: JP4744188U
Authority: JP
Priority date: 1988-04-07
Filing date: 1988-04-07
Publication date: 1989-10-26

Description

[Brief explanation of drawings]

第１〜４図は本考案に係る射出成形用金型の一
実施例を示す図であり、第１図はその要部断面図
、第２図および第３図は作用を示すその要部拡大
断面図、第４図はその金型内圧力と時間との関係
を示すグラフ、第５〜８図は従来の射出成形用金
型の要部断面図である。１……射出成形用金型、｛２……固定金型、３
……可動金型｝（分割金型）、２ｂ……溝部、３
ｂ……溝部、２ｅ……型締め面、３ｅ……型締め
面、４……球状弁体、６……第２ランナー（ラン
ナー）、８……キヤビテイ、９……スプルー、１
０……弁座、１０ａ……段差状の内周縁、１１…
…ストツプピン（支承用突部）。 Figures 1 to 4 are diagrams showing one embodiment of an injection mold according to the present invention, with Figure 1 being a cross-sectional view of the main part thereof, and Figures 2 and 3 being enlarged views of the main part showing the operation. FIG. 4 is a graph showing the relationship between pressure inside the mold and time, and FIGS. 5 to 8 are cross-sectional views of main parts of a conventional injection mold. 1... Injection mold, {2... Fixed mold, 3
...Movable mold} (split mold), 2b...Groove, 3
b... Groove, 2e... Mold clamping surface, 3e... Mold clamping surface, 4... Spherical valve body, 6... Second runner (runner), 8... Cavity, 9... Sprue, 1
0...Valve seat, 10a...Step-shaped inner peripheral edge, 11...
...Stop pin (supporting protrusion).

Claims

[Scope of utility model registration request]

A pair of split molds are provided in which a cavity and a runner communicating with the cavity are formed when the molds are clamped, and a groove portion for forming the runner is formed in the clamping surface of at least one of the split molds, A sprue is formed in the mold to communicate with the groove to supply molten resin, a spherical valve body is loosely inserted into the groove, and the spherical valve body can be seated in a portion of the groove on the sprue side. and a supporting protrusion for supporting the spherical valve body while allowing the molten resin to pass through a portion of the groove on the cavity side. A mold for injection molding, characterized in that the spherical valve element is seated on a valve seat by making the spherical valve element come into contact with the stepped inner peripheral edge.