INJECTION MOLDING DEVICE AND METHOD

PROBLEM TO BE SOLVED: To allow casting burrs to be removed in a molding process for a work-piece so as to achieve omission or simplification of work for removing burrs.SOLUTION: A fixed mold 16, a movable mold 17 and an intermediate mold 18 interposed between the molds 16 and 17 are subjected to mold clamping to mold a work-piece W, and then the intermediate mold 18 is moved to a position separated away from the molds 16 and 17 via a support bar 19a when opening the molds. At the same time, the work-piece W is moved integrally with the intermediate mold 18, while holding the work-piece with a work-piece holding pin 20 which protrudes from the fixed mold 16 side and a work-piece holding pin 21a which protrudes from the movable mold 17 side. Then, by moving back and forth the intermediate mold 18 while keeping the work-piece W in a stationary state, casting burrs Wv formed at a flange part Wf of the work-piece W are cut and removed with an edge 18f of a cavity surface 18a.SELECTED DRAWING: Figure 9 【課題】鋳バリをワークの成型工程において除去するようにして、バリ取り作業の省略、或いは簡略化を実現することができるようにする。【解決手段】固定型１６と可動型１７と両金型１６，１７間に介装された中間型１８とを型締めしてワークＷを成形した後、型開きするに際し、中間型１８を、支持バー１９ａを介して両金型１６，１７から離間する位置まで移動させる。同時に、ワークＷを固定型１６側から突出するワーク保持ピン２０ａと可動型１７側から突出するワーク保持ピン２１ａとで挟持して、中間型１８と一体に移動させる。次いで、ワークＷを静止させた状態で中間型１８を進退動作させて、キャビティ面１８ａのエッジ１８ｆにてワークＷのフランジ部Ｗｆに形成されている鋳バリＷｖを剪断除去する。【選択図】図９