| 摘要 |
There is disclosed an automatic control system for maintaining the thickness of a multilayer or multilaminae flowsheet of rubber or plastic material. The system includes a plurality of screwdown motors for controlling calender roll separation and a plurality of selsyn systems responsive to screwdown movement and connected in a feedback control system to selectively deenergize the screwdown motors to control correction of laminae thickness. The laminae thickness feedback control system is operable with a beta gauge sheet thickness maintenance control, where the latter control operates to maintain total sheet thickness at a predetermined value.
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