JPH03103723U

JPH03103723U -

Info

Publication number: JPH03103723U
Application number: JP1204190U
Authority: JP
Priority date: 1990-02-09
Filing date: 1990-02-09
Publication date: 1991-10-28

Description

[Brief explanation of drawings]

第１図は本考案の実施例１を示す縦断面図、第
２図は本考案に係る成形品を示す斜視図、第３図
は本考案の実施例２に係る樹脂成形を示す斜視図
、第４図、第５図、第６図は従来のモールド成形
金型を示す図であつて、第４図はキヤビテイ部断
面図、第５図は樹脂成形品を示す斜視図、第６図
はゲートと成形品部を分離したときのゲートバリ
が発生した状態を示す斜視図である。１……上金型、１ａ……上金型のキヤビテイ部
、２……下金型、２ａ……下金型のキヤビテイ部
、３……成形品、４……ランナー、５……ゲート
、６……ゲート口、７……ゲートバリ、８……Ｖ
溝、８ａ，８ｂ……突起部、９……台形部。 FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention, FIG. 2 is a perspective view of a molded product according to the present invention, and FIG. 3 is a perspective view showing resin molding according to a second embodiment of the present invention. Figures 4, 5, and 6 show conventional molding dies, in which Figure 4 is a sectional view of the cavity, Figure 5 is a perspective view of a resin molded product, and Figure 6 is a perspective view of a resin molded product. FIG. 3 is a perspective view showing a state in which gate burrs are generated when the gate and the molded part are separated. DESCRIPTION OF SYMBOLS 1... Upper mold, 1a... Cavity part of upper mold, 2... Lower mold, 2a... Cavity part of lower mold, 3... Molded product, 4... Runner, 5... Gate, 6...Gate entrance, 7...Gate burr, 8...V
Groove, 8a, 8b... protrusion, 9... trapezoidal part.

Claims

[Scope of utility model registration request]

A molding die characterized in that the boundary between the cavity and the gate of the molding die has a protrusion projecting at an acute angle toward the gate opening side.