Method of controlling thickness of coated film on web-like...

Details Method of controlling thickness of coated film on web-like... Method of controlling thickness of coated film on web-like...

B - Operations, Transporting

05

D

B05D 1/28 (2006.01) B05C 1/08 (2006.01) B05C 1/12 (2006.01)

Patent

CA 2081159

A paint in a paint pan is picked up through a gap h PA formed between a pickup roll and an applicator roll, part of the paint is attached to the applicator roll and delivered to a sheet as a supply flow rate q A. The film thickness coated on the sheet is controlled in accordance with a modal equation: M=((q A-q L)' 7 'C)/LS which has evaluated a difference between the supply flow rate q A and a leak flow rate q L not transferred onto the sheet, remaining on the applicator roll and escaping through a gap h AS ( .gamma. is the specific gravity of the paint, C the concentration of a solid content of the paint and LS a moving speed of the sheet. Therefore, thickness of a coating film can be controlled at high accuracy over the wide ranges of the coating conditions.

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