JPS6159017U

JPS6159017U -

Info

Publication number: JPS6159017U
Application number: JP14227284U
Authority: JP
Priority date: 1984-09-21
Filing date: 1984-09-21
Publication date: 1986-04-21
Also published as: JPH034501Y2

Description

[Brief explanation of the drawing]

第１図は一次成形品の一例を示す断面斜視図、
第２図は本考案が適用された射出成形装置の全体
側面図、第３図は型閉めかつゲートブロツクが成
形位置にあるときの要部断面図、第４図は第３図
の要部拡大断面図、第５図は型開きされかつゲー
トブロツクが退避位置へ向けて変位している様子
を示す第４図に対応した部分の拡大断面図。Ａ：一次成形品、１：製品部、２：ゲート部、
３：ランナ部、４：スプール部、１３：固定キヤ
ビテイダイ、１４：コアダイ、１４ｂ：ゲート部
成形面、１５：キヤビテイ、１６：ゲートブロツ
ク、１６ａ：端面成形面、１６ｂ：ゲート部成形
面、１７：ガイドロツド、１９：フイルムゲート
、２０：アンダーカツト、２１，２２：ランナ、
２３：スプール、２４：（先行）エジエクタピン
、２５：（後行）エジエクタピン。 FIG. 1 is a cross-sectional perspective view showing an example of a primary molded product;
Figure 2 is an overall side view of the injection molding apparatus to which the present invention is applied, Figure 3 is a sectional view of the main parts when the mold is closed and the gate block is in the molding position, and Figure 4 is an enlarged view of the main parts of Figure 3. 5 is an enlarged sectional view of a portion corresponding to FIG. 4 showing the mold being opened and the gate block being displaced toward the retracted position; FIG. A: Primary molded product, 1: Product section, 2: Gate section,
3: Runner part, 4: Spool part, 13: Fixed cavity die, 14: Core die, 14b: Gate part molding surface, 15: Cavity, 16: Gate block, 16a: End face molding surface, 16b: Gate part molding surface, 17: Guide rod, 19: Film gate, 20: Undercut, 21, 22: Runner,
23: Spool, 24: (leading) ejector pin, 25: (trailing) ejector pin.

Claims

[Claims for Utility Model Registration] A fixed cavity die and a core die that is movable back and forth with respect to the fixed cavity die and forms a mold that can be opened and closed in cooperation with the fixed cavity die, and when the core die moves forward. By injecting resin into the cavity in the closed mold through the spool, runner, and film gate, the product part corresponding to the cavity is made to correspond to the gate part corresponding to the film gate and the runner. A primary molded product is formed in which a runner portion corresponding to the spool and a spool portion corresponding to the spool are sequentially arranged, and the core die has a spool portion extending outwardly from the axis of movement in the forward direction of the core die. A gate block is held that is movable along an inclined axis of inclination, and the gate block can change between a molding position and a retracted position located forward and outward from the molding position according to the movement of the gate block. When the gate block is in the molding position, a front surface thereof constitutes an end surface molding surface for molding the end surface of the product part, and a surface facing the side surface of the core die molds the gate part. A side surface of the core die that molds the gate part is formed with an undercut near an end surface of the product part, and a leading ejector pin that pushes out the gate block to the retracted position; An automatic gate cutting device for injection molding, comprising: a trailing ejector pin that pushes out the runner portion with a predetermined stroke delay from the ejector pin.