Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1974-05-31
1976-10-12
White, Robert F.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
264176R, 425141, 425466, B29D 702
Patent
active
039858456
ABSTRACT:
A method and an apparatus for adjusting the gap between lips of a die for extruding a plastic sheet material. A pair of flat plates spaced from each other have a plurality of bolts for controlling the gap. The operational adjustment of each bolt is generated as an electric signal, and this electric signal is added with reference to all the bolts to distribute the gaps between the die lips. Each adjustment is changed so that the distribution of the gap between the die lips acquires a predetermined form to thereby determine the necessary amount of adjustment of each bolt.
REFERENCES:
patent: 2938231 (1960-05-01), Lowey, Jr.
patent: 3694119 (1972-09-01), Scheibling
patent: 3782873 (1974-01-01), Lynnknowles
Peter Fischer, Messen-Regeln-Stevern, Kunstoff-Technik, Fall 1971, pp. 79-80.
System Described for Automating Extruder Die Adjustment, Plastics Technology, May 1964.
Akatsuka Takeaki
Amo Hiroyoshi
Kitagawa Katsuichi
Mita Osamu
Balhoff T. E.
Toray Industries Inc.
White Robert F.
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