Apparatus for and method of controlling calender roll gap

Details Apparatus for and method of controlling calender roll gap Apparatus for and method of controlling calender roll gap

1993-03-05

1995-10-10

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 405, 264175, 264473, 425141, 425367, B29C 4324, B29C 4328, B29C 4358

Patent

active

054568714

ABSTRACT:
The roll gap control system for a calender having first and second rolls (18, 19) rolling a raw material (B) includes a load measuring unit (11) for detecting a rolling load change between the first and second rolls (18, 19), a roll shaft position adjusting device (41) for increasing/decreasing a roll gap and a controller (46) for computing a roll gap change (.DELTA.h) based on the rolling load change (.DELTA.P) and for activating the roll shaft position adjusting device (41) to compensate for the roll gap change (.DELTA.h). A spring constant (k) of first and second rolls (18, 19) and mechanical members (24, 25, 28) supporting these rolls of the calender is calculated, and the rolling load change (.DELTA.P) is divided by the spring constant (k). The quotient (.DELTA.P/k) is the roll gap change (.DELTA.h).

REFERENCES:
patent: 3930922 (1976-01-01), Donoghue et al.
patent: 4214857 (1980-07-01), Woeckener et al.
Database WPIL, Week 9206, Derwent Publications Ltd., London, GB; AN 92-046168 & JP-A-3 292 114 (Ishikawajima-Harima Juko) 24 Dec. 1991.

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