JPH0164412U

JPH0164412U -

Info

Publication number: JPH0164412U
Application number: JP1987159666U
Authority: JP
Priority date: 1987-10-19
Filing date: 1987-10-19
Publication date: 1989-04-25

Description

[Brief explanation of the drawing]

第１図上半分、第２図は本考案の一実施例を第
一次射出時、第二次射出時の夫々の状況で示す概
要図、第１図下半分は第二次射出時における移動
コアの状況を示す概要図、第３図はシヤツトオフ
弁を組込んだ本考案の他実施例を第２図に対応さ
せて示す概要図、第４図はシヤツトオフゲートの
要部拡大図、第５図、第６図は従来例を第一次射
出時の状況、第二次射出時の状況で示す概要図で
ある。１…キヤビテイ型、４…コア型、６，７…第１
キヤビテイ形成面、８…第１キヤビテイ、９…移
動コア、１０，１１…ばね受、１２…戻しばね、
１５…第２キヤビテイ形成面、１６…第２キヤビ
テイ、１７…第一次射出用ゲート、２１…第二次
射出用ゲート、２２…シヤツトオフ弁。 The upper half of Fig. 1 and Fig. 2 are schematic diagrams showing an embodiment of the present invention during the primary injection and the secondary injection, respectively, and the lower half of Fig. 1 shows the movement during the secondary injection. Fig. 3 is a schematic diagram showing the state of the core, Fig. 3 is a schematic diagram corresponding to Fig. 2, showing another embodiment of the present invention incorporating a shut-off valve, Fig. 4 is an enlarged view of the main part of the shut-off gate, Fig. FIGS. 5 and 6 are schematic diagrams showing the conventional example at the time of primary injection and at the time of secondary injection. 1...Cavity type, 4...Core type, 6, 7...First
Cavity forming surface, 8... First cavity, 9... Moving core, 10, 11... Spring receiver, 12... Return spring,
15... Second cavity forming surface, 16... Second cavity, 17... Primary injection gate, 21... Secondary injection gate, 22... Shut-off valve.

Claims

[Claims for Utility Model Registration] (1) A cavity mold and a core mold are arranged facing each other, and in the clamped state, a first cavity is formed between the cavity mold and the core mold, and the first cavity can be moved forward and backward with respect to the first cavity. A moving core is provided in the cavity mold, and a second moving core is provided in the core mold opposite to the distal end surface of the moving core.
A second cavity is defined by the movable core and the core mold in a state where the cavity forming surface is recessed and the moving core is brought into close contact with the first cavity forming surface of the core mold, and a first cavity is formed in the second cavity. An injection mold device characterized in that after performing injection, the movable core is moved back to perform a second injection into the first cavity. (2) The injection mold device according to claim 1, wherein a force is applied to the movable core to move it toward the core mold side by a nozzle touch of the first plasticizing device. (3) The injection mold device according to claim 1 or 2, wherein the movable core is biased by a spring to force the movable core to retreat toward the side opposite to the core mold.