Extrusion die for the production of a flat sheet of thermoplasti

Details Extrusion die for the production of a flat sheet of thermoplasti Extrusion die for the production of a flat sheet of thermoplasti

1987-08-21

1988-06-28

Chiesa, Richard L.

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

4251335, 425141, 425381, 425466, B29C 4716, B29C 4792

Patent

active

047535873

ABSTRACT:
An extrusion die having an adjustable lip opening through which thermoplastic material is forced to form a flat sheet. Fine adjustment of the lip is effected thermally and without play by the provision of an element or a heating or cooling block which braces the lip. Coarse adjustment is effected manually, and without play, by operation of a pair of bolts. One bolt axially shifts the block, and the other bolt tightens the block against the die body.

REFERENCES:
patent: 2387718 (1945-10-01), Coleman
patent: 2938231 (1960-05-01), Lowey, Jr.
patent: 3096543 (1963-07-01), Konopacke et al.
patent: 3464087 (1969-09-01), Koch
patent: 3829274 (1974-08-01), Melead
patent: 3940221 (1976-02-01), Nissel
patent: 4003689 (1977-01-01), Harrison et al.
patent: 4201534 (1980-05-01), Phipps
patent: 4302172 (1981-11-01), Hogseth et al.
patent: 4382766 (1983-05-01), Feuerherm

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