Contact roll pushing pressure control manner null of slitter for sheet condition thing

摘要

PURPOSE:To enable control into the desired pressing force even in the case of using a contact roll of different self-weight by controlling the air pressure of an air cylinder in such a way as to place the contact roll into the preset neutral position before bringing the contact roll into contact with a take-up core. CONSTITUTION:The position of a roll 13 is detected by a photo-sensor 21 before a take-up core 15 is brought into contact with a contact roll 13. The air pressure of an air cylinder 12 is then controlled through an electropneumatic converter 19 so that this detected position is placed into a neutral position. At this time, the self-weight elements of the roll 13 and an arm 16 are balanced with the force by the air cylinder 12, and the roll 13 stands still in the neutral position. The air pressure in this neutral position is stored as the base pressure, and air pressure required for the generation of pressing force to the take-up core 15 is added to this base pressure at the take-up time so as to be made into the actual control pressure for performing take-up. The pressing force can be thereby controlled accurately regardless of change in the self-weight of the contact roll 13.