Valve gate for a hot runner injection molding machine

Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface

Reexamination Certificate

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Details

C425S548000

Reexamination Certificate

active

07341688

ABSTRACT:
A method and apparatus for improving the quality of molded parts in a molding system having a valve stem and a valve gate. The valve stem is movable between a fully retracted position where the gate is fully open to a fully forward position where the gate is fully closed and into an intermediate position where the gate remains closed but the valve stem is displaced from the gate so heat transfer through the valve stem and into the gate region is minimized.

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International Search Report for PCT/CA2005/001543, dated Jan. 26, 2006, three pages, related to the above-identified US patent application.

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