Hot-runner mold for injection molding

Details Hot-runner mold for injection molding Hot-runner mold for injection molding

1985-05-29

1987-04-14

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

264 451, 2643288, 264513, 4251311, 4251331, 425562, 425564, B29C 4516

Patent

active

046574964

ABSTRACT:
A hot-runner mold for injection molding for obtaining a product constructed of a multi-layered body made of two kinds of thermoplastic resinous materials comprises: a first hot-runner which communicates with an outlet formed in a hot-runner block and is provided in an interior of the hot-runner block; an outer stem received in the first hot-runner; a second hot-runner which communicates with an outlet formed in the outer stem and is provided in an interior of the outer stem; and an inner stem which is reciprocally movably received in the second hot-runner so that a front end portion of the inner stem conducts an opening/closing operation of each of the outlets of the hot-runner block and the outer stem.

REFERENCES:
patent: 3037245 (1962-06-01), Darnell
patent: 3849048 (1974-11-01), Bielfeldt et al.
patent: 3947175 (1976-03-01), Melcher
patent: 3947177 (1976-03-01), Eckardt
patent: 3972664 (1976-08-01), Fillman
patent: 4078875 (1978-03-01), Eckardt
patent: 4376625 (1983-03-01), Eckardt

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