The calender generally adopts a vertical three-roll calender. When used for the production of film, the middle roller is fixed. The speed of the middle roller is faster than that of the upper roller. The speed ratio is (1.1 ~ 1.4): 1. The speed of the lower roller is the same as that of the middle roller. When the calender is started, the upper roll temperature is 50 ° C, the middle roll should be kept at room temperature, and the lower roll is cooled with cooling water. The calendering speed is generally 60 ~ 7500px · min-1. It should not be too fast. Adjust the roll pitch (middle and lower rolls) at a low speed to ensure a certain calendering thickness, and then increase to normal speed for continuous operation.

When the three-roll calender is used for silicone rubber gluing and wiping, the fabric replaces the pad (polyester film) and passes between the middle and lower rolls. The three-roller calender is only suitable for single-sided coating. For long-term production, a four-roller calender should be used.

The rubber used for calendering must properly control the degree of remelting. It is best to incomplete remelting on the rubber mill in order to obtain sufficient remelting during the calendering process. This can prevent the rubber from being overrefined during the calendering process. Sticky roll. The rubber compound formula also has a certain effect on the calendering, and the rubber material calendering process using the reinforcing filler has better performance.