Apparatus for adjusting die lip gap

Details Apparatus for adjusting die lip gap Apparatus for adjusting die lip gap

1990-05-09

1991-06-04

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Control means responsive to product weight or dimension

264 401, 425143, 425466, B29C 4722

Patent

active

050209841

ABSTRACT:
The present invention provides an extrusion apparatus having an improved mechanism for thermally-controlled, lip gap adjustment. The apparatus includes a flow path for a gaseous cooling medium, in which flow path a plurality of temperature-responsive, lip gap adjustment members are disposed. Structurally associated with each such adjustment member is a heating wire.

REFERENCES:
patent: 2938231 (1960-05-01), Lowey
patent: 3920365 (1975-11-01), Mules
patent: 3940221 (1976-02-01), Nissel
patent: 4507073 (1985-03-01), Shelton
patent: 4726752 (1988-02-01), VanDun
patent: 4753587 (1988-06-01), Djordjevic et al.
patent: 4781562 (1988-11-01), Sano et al.
patent: 4854844 (1989-08-01), Carlsen

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