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
Patent
1985-07-25
1986-06-03
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, 264176R, 264555, 310 26, 310328, 425140, B29C 4792, H01L 4100
Patent
active
045927103
ABSTRACT:
An extruder press unit for extrusion of a thermoplastic material has at least one output gap in an extruder body, wherein the output gap is formed by an output gap-defining adjustable extruder lip and an opposing gap-bounding lip. This output gap is adjustable with the help of a mechanical coarse adjusting mechanism to a given gap width, and the gap-defining adjustable extruder lip is connected to at least one adjusting element, to which a control and adjusting device for the thickness of the extruded material is associated. The opposing gap-bounding lip is likewise constructed as an adjustable structural component. The coarse adjusting mechanism operates on the opposing gap bounding lip. A field translator is employed as at least one of the adjusting elements and of course in the form of either a piezotransistor or a magnetrostriction translator. The control and adjusting device is set up for a fine adjustment in the range between 0.05 and 0.3 mm, preferably between 0.10 to 0.20 mm.
REFERENCES:
patent: 3040221 (1962-06-01), Fitzner
patent: 3940221 (1976-02-01), Nissel
patent: 4016437 (1977-04-01), Calderara et al.
patent: 4126031 (1978-11-01), Ignashev et al.
patent: 4305704 (1981-12-01), Lemelson
Beisemann Heinz
Grabowski Robert
Reifenhauser Hans
Reitemeyer Paul
Cabaniss Jennifer E.
Dubno Herbert
Reifenhauser GmbH & Co.
Ross Karl F.
Woo Jay H.
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