PURPOSE:To correspond to the variation of runner design by composing a cassette, independently separated from a molding section, of a runner mounting plate and a runner plate. CONSTITUTION:A runner cassette 2 is composed of a runner plate 21 and its mounting plate 22 and is inserted into a base holder on the fixed side. A sprue bush 13 is installed on the mounting plate 22 and also a runner lock pin is disposed thereon. A lock hole corresponding to the runner lock pin is opened on the runner plate 21 and a sprue runner is fixed thereon. A molding section cassette 3 consists of a core block 31, a cavity block 32, a mounting plate 33 and an ejection mechanism 34, and a runner 23 is engraved on the back face of the cavity block 32. The cavity block 32 and the runner plate 21 are separated after molding, while the sprue runner remains on the side of the runner plate 21. The runner plate is ejected by a runner pusher pin. Then the core block 31 and the cavity block 32 are separated and a molded product is released.
展开▼
