Method of degating molded parts

Details Method of degating molded parts Method of degating molded parts

1993-05-20

1999-05-25

Smith, Duane S.

Plastic and nonmetallic article shaping or treating: processes

With step of cooling to a temperature of zero degrees c. or...

264161, 2643289, B29C 4538

Patent

active

059067764

ABSTRACT:
A method of degating molded parts including the steps of providing a water soluble molding material, molding a configuration from the molding material including parts secured to a runner system by gates of the molding material having a cross-section substantially thinner than any cross-section of the molded configuration, cooling the surfaces of the configuration to a temperature and for a time until only the gates becomes brittle, preferably by spraying liquid nitrogen over the surface of the configuration and applying an impact to the configuration to cause the configuration to sever at the gates, preferably by tumbling the cooled configuration, whereby the severed parts are separated from the runner system.

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Plastics, Dubois and John ed., Reinhold Publishing Corp., N.Y.: 1967, p. 333.

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