Extruder press unit for extruding thermoplastic material

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

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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

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