Plastic article or earthenware shaping or treating: apparatus – Dough divider type including trap chamber – Rotating trap chamber pickup
Patent
1975-12-18
1976-11-02
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
Dough divider type including trap chamber
Rotating trap chamber pickup
425292, 425324R, 425444, 425810, 264155, B29F 100
Patent
active
039894363
ABSTRACT:
Heated material is injected into an annular cavity, defined by a pair of mold-halves, through a sprue passage, defined by a sprue bushing and an end portion of a punch. The annular cavity and the sprue passage form, respectively, the centrally apertured part and a sprue. After partial cooling of the heated material, the punch is locked in place while the annular cavity is displaced relative to the sprue passage so that the sprue is severed from the part along the peripheral surface of the punch end portion. The mold halves are separated to open the annular cavity while the sprue is resting on the punch end portion, and while the part is held by the punch end peripheral surface. After the mold halves are separated, a sprue ejector member and a part ejector member are actuated to eject, respectively, the sprue and the part from the punch end portion.
REFERENCES:
patent: 3412427 (1968-11-01), Flusfeder et al.
patent: 3443628 (1969-05-01), Carr
patent: 3862815 (1975-01-01), Roczynski et al.
patent: 3889563 (1975-06-01), Westermann
patent: 3932085 (1976-01-01), Horbach
patent: 3938585 (1976-02-01), Rader
McNeely Michael Lee
Rees Herbert
Husky Injection Molding Systems
Kulkarni Dilip A.
Meagher William H.
RCA Corporation
Spicer, Jr. Robert L.
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