Molding tool, and method of making plastic articles

Details Molding tool, and method of making plastic articles Molding tool, and method of making plastic articles

2006-08-30

2008-11-04

Huson, Monica A (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

C264S327000, C264S040600

Reexamination Certificate

active

07445743

ABSTRACT:
A mold portion of a molding tool for making plastic articles includes a base body defining a cavity surface and having formed therein at least one heating channel, and at least one cooling channel separated from the heating channel and having a cross section which is smaller than a cross section of the heating channel. The cooling channel is positioned hereby closer to the cavity surface than the heat channel and thus is in an area between the heat channel and the cavity surface, thereby defining a cavity-proximal cooling channel and a cavity-distal heat channel. Before the injection process, the cavity surface is heated by the heat channel to a higher temperature than the demolding temperature of the plastic article to be formed. At the end of the injection process, the cavity surface is cooled by the cooling system.

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