Rubber calendering line is one of the basic equipment in rubber products processing process, and it is a heavy-duty and high-precision machine. It is widely used in tire, conveyor belt, transmission belt, air spring, rubber products and other industries. The calender of rubber calendering line can be configured with different number and arrangement of rollers according to the needs of products and process. The main machine of calender is generally equipped with devices such as axial crossing, preloading and prebending to improve the precision of calendering products. In addition to the roll and the corresponding parts, the rubber calender is also equipped with necessary auxiliary devices, such as lubrication device, stock guide device, trimming knife device, etc.