Reciprocating heated nozzle

Details Reciprocating heated nozzle Reciprocating heated nozzle

1990-04-16

1991-08-06

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

26432815, 425549, B29C 4572

Patent

active

050375989

ABSTRACT:
A plastic molding system and a method for delivering a melt stream of moldable plastic material to a mold cavity wherein a plastic melt is conveyed through a distribution channel and a mold channel or heated nozzle communicating with the distribution channel to the mold cavity via a mold gate between the mold channel and the mold cavity to fill the mold cavity. The plastic melt is frozen in the gate after the mold cavity is filled to block access from the mold channel to the mold cavity. A heated probe is provided in the mold channel movable from a first position spaced from the mold gate to provide a wide flow channel to the mold cavity to a second position adjacent the mold gate to melt the frozen plastic in the gate.

REFERENCES:
patent: 4212624 (1980-07-01), Ando et al.
patent: 4669971 (1987-06-01), Gellert
patent: 4836766 (1989-06-01), Gellert

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