Cold rolling method of strip

B - Operations – Transporting – 21 – B

Patent

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80/51

B21B 1/28 (2006.01) B21B 28/04 (2006.01)

Patent

CA 2014061

A cold rolling method of strip is provided wherein the brushing roll are contacted to both the work rolls and the back up rolls of the temper mill, removing the foreign objects from the surface of the rolls of the mill and the duct adjacent to the brushing rolls transport the foreign objects out of the mill system. The sucking speed of the duct is at least 5 m/sec., more preferably 8 m/sec. The length of the bristle is from 15 to 60mm, the diameter thereof being from 0.15mm to 1.0mm, and the material thereof being selected from a group of nylon, propyrene, and the mixture thereof. The density of the bristle with respect to the peripheral surface area of the brushing rolls for the work roll is from 55 to 85 % by area. Abrasive grains with the grain size of #300 to #1200 are incorporated in the brush of said brushing roll which enhance the brushing ability. The material of the abrasive grain is one or more selected from a group of alumina, titania, and silicate, and volume percentage of the grain with respect to volume of brush is from 5 to 30 % in volume.

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