Film thickness controller

Details Film thickness controller Film thickness controller

1989-11-27

1991-08-06

MacDonald, Allen R.

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

364473, D21F 706

Patent

active

050383973

ABSTRACT:
There is disclosed a film thickness controller which contains a large dead time and in which, in order to solve a problem due to the dead time, past data is stored in a memory and a state variable is calculated on the basis of the stored data to control a system. The film thickness controller includes an adjusting mechanism including a plurality of die lips having interference effect. In order to solve a problem due to the interference effect, the film thickness controller combines a plurality of basic control systems to control the adjusting mechanism including the plurality of die lips.

REFERENCES:
patent: 4680089 (1987-07-01), Arai et al.

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