INJECTION MOULD Russian patent published in 1995 - IPC

FIELD: foundry practice. SUBSTANCE: two halves, fixed and movable, of the mould are brought into alignment by two locating pins. Ejecting plates and a casting pusher made up of two halves held together by a pin are located inside the movable half. When the pressure-injected metal has solidified, the mould starts opening and, before this operation ends, a sprue ejector in cooperation with the two halves of the casting pusher and an additional ejector separate the sprue with the casting from the movable half. At the end of the ejecting cycle, an end piece of a bell-crank comes abutting against a stop disposed in the plane of the movable half. As a result, the opposite end of the bell-crank pivots about the axis and fits into a slot so that the additional ejector pushes in an advanced motion the end face of the casting from the end face cavity of the moulding halves. The injection mould closes after the casting has been withdrawn. EFFECT: simplification of mould design. 4 cl, 3 dwg