Method for runnerless injection molding synthetic resin by inter

Details Method for runnerless injection molding synthetic resin by inter Method for runnerless injection molding synthetic resin by inter

1988-03-23

1990-01-16

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Forming plural articles

26432814, 26432815, 425548, 425549, 425588, B29C 4572

Patent

active

048941972

ABSTRACT:
A runnerless method for injecting and molding a synthetic resin through a gate wherein a molten resin is intermittently cooled to solidification using a cooling medium to close the door for every injecting and molding operation of a molten resin in the gate, and relates also to a novel runnerless apparatus for injecting and molding a synthetic resin provided with a metal mold mechanism composed of a plural number of component members, in which the passage for the molten resin including a runner, the gate, and a cavity are drilled, a cooling medium-employing intermittent cooling mechanism for intermittently cooling the gate thereby enabling solidification of the molten resin in the gate, a mechanism for continuously applying heat to the gate for melting an existing resin, and an injection mechanism.

REFERENCES:
patent: 4438064 (1984-03-01), Tsutsumi

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