INJECTION MOLDING EQUIPMENT FOR HOLLOW ITEM

摘要

PURPOSE:To enable a joggle to be ejected by adding an ejection function to a fixed pin for forming a hollow core when a functional factor is provided to the joggle which is not needed as a function required for forming a void. CONSTITUTION:A fixed pin 2 and a void pin 3 are fixed to a pin fixing plate 10. An air charging hole 12 is provided in a mobable bottom plate 11. A sleeve pin 8 for ejecting a joggle 5 is fixed to an ejection plate 9. In this manner, the joggle 5 is ejected up by the sleeve pin 8 by the action of the ejection plate 9. The fixed pin 2 and the void pin 3 are fixed to the pin fixing plate 10, thus having no relation to the action of the ejection plate 9. The joggle 5 is released from a mold. In addition, air reaches the top end of the void pin 3 through a gap between the fixed pin 2 and the void pin 3 to be charged into a cavity space 4.