SUCTION HEAD STRUCTURE OF ROLL POLISHING DEVICE

PURPOSE:To keep roll surface normal and to greatly reduce a surface defect of metal band by providing a suction head with suction holes opened at its tip part and the suction holes with the peripheral part accompanied by the roll peripheral and not accompanied by the roll peripheral. CONSTITUTION:A suction head 3 of a roll polishing device 1 is provided with suction holes 14 opened at its tip part, and the suction holes are provided with the peripheral part accompanied by the roll peripheral as well as not accompanied by the roll peripheral. When the suction head 3 is abutted on the roll peripheral, air suction passage is formed with the peripheral not accompanied by the roll peripheral face, the air near the contact part between the suction head 3 and roll peripheral is sucked in a large volume through the suction passage, foreign matter like grinding powder, etc., is efficiently sucked. Also, through the part formed with the peripheral of the suction holes 3 accompanied by the peripheral of rolling roll R, the foreign matter adhered to a grinding belt 16 is sucked. By this method, foreign matter like grinding powder, etc., is sucked/removed at polishing position.