The biggest danger when changing rolls is caused by lifting the rollers. A roller of a large Calender machine may exceed 50 tons.
Which on the upgrading of equipment and the level of the operator has a very high demand. Everyone should know the order in which the work is performed. Before you start changing rolls, you need to plan and discuss through:
1, do not move around the hanging when the move or stand.
2, before upgrading any parts, check the performance of the crane and the state of the pulley and ensure that the weight of the roller does not exceed the maximum load of the crane.
3, before the roll, the roller and its surrounding should be kept clean. Any debris or obstructions may cause danger.
4, to ensure that the rope and lift the belt load capacity is large enough, not damaged and in good condition.
5, before lifting, from the roller off all the pipes, hoses and cables. Remember to release the drive shaft, the coupling head with other equipment.
6, before the upgrade as much as possible to drain the oil.
7, connect the electrical drive to lock the security to prevent accidental start.