Thickness control system for an extrusion die

Details Thickness control system for an extrusion die Thickness control system for an extrusion die

1973-09-10

1976-02-24

Husar, Francis S.

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

425143, 425381, 425466, B29F 304

Patent

active

039402215

ABSTRACT:
A die having a controllable lip opening, through which flowable material is forced to form a sheet, film or tube. Lip opening control means including an elongated member which expands and contracts thermally and adjusts the lip opening to control the product thickness, and heating means is provided for controlling this expansion and contraction.

REFERENCES:
patent: 2938231 (1960-05-01), Lowey, Jr.
patent: 3531827 (1970-10-01), Dragonnette
patent: 3694119 (1972-09-01), Scheibling
patent: 3782873 (1974-01-01), Lynnknowles
patent: 3835209 (1974-09-01), Karabedian

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