Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With product ejector
Patent
1979-10-02
1980-12-16
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With product ejector
425572, B29F 100
Patent
active
042394767
ABSTRACT:
An injection mold for nonrigid plastic has separate mold cavities disposed on opposite sides of an intermediate mold part and fed from a common feed passage in one of a pair of outer mold parts defining the mold cavities jointly with the intermediate mold part. The intermediate mold part is divided along a plane transverse to the opening direction of the mold and its two halves are connected in accordion fashion with one another and respective ones of the outer mold parts. An extractor is disposed in the dividing plane and extends through a feed cavity which communicates with the feed channel and from which runner channels extend to the mold cavities. The feed cavity ensures a simultaneous distribution of the plastic compound to the mold cavities at both sides of the intermediate mold part upon injection, and when the mold is opened, the extractor pulls the moldings out of the mold cavities.
REFERENCES:
patent: 2571766 (1951-10-01), Saulino
patent: 2876495 (1959-03-01), Spillman
patent: 3843295 (1974-10-01), Greenberg
patent: 3892512 (1975-07-01), Diehl
patent: 3989436 (1976-11-01), McNeely et al.
patent: 4181488 (1980-01-01), Grawey et al.
Plastics Mold Engineering Handbook; 3rd Ed., New York, N.Y.; DuBois, J. H. and Pribble, W. I.; 1978, pp. 384 & 385.
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