Method and apparatus for heating plastic extruding die

Details Method and apparatus for heating plastic extruding die Method and apparatus for heating plastic extruding die

2007-07-03

2007-07-03

Davis, Robert (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

Including heating or cooling means

C425S144000, C425S378200, C425S313000

Reexamination Certificate

active

11125088

ABSTRACT:
A coil surrounding only the tip of nozzles of a plastic extruding die is provided. By passing a high frequency current through the coil to selectively heat only the tip of the nozzles. Further, in a plastic extruding die in which a high frequency current is passed through a coil provided around nozzles to heat the periphery of the nozzles, the coil is formed of a conductor tube through which a coolant is caused to flow.

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patent: 2003-326518 (2003-11-01), None

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