Calendering is one of the basic processes of rubber processing. Calendering is the use of the pressing force of the calender roll to cause plastic flow deformation of the rubber compound, the rubber material is made into a film having a certain section size and geometry, or the rubber material is attached to the surface of the fiber textile or metal fabric. The processing of the tape. The work that can be done by the calendering process includes the compression of the rubber, the molding, the lamination of the film, the lamination of the textile, the pressure coating and the rubbing.
The calendering process is a continuous flow operation form centered on the calendering process and belongs to a continuous operation process. The rolling speed is faster and the production efficiency is high. The quality requirement for semi-finished products is that the surface is smooth and free of debris, the interior is dense and free of bubbles, the cross-section geometry is accurate, the thickness is accurate, the error range is from 0·1 to 0.01 mm, and the surface pattern is clear. Therefore, in order to ensure the quality of calendering, reduce waste, and have high requirements on the level of operation technology, it must be skilled in operation, and the process conditions should be strict and meticulous, and there must be no negligence.
The calender consists of a roller, a bearing, a frame, a base, a distance adjusting device, a transmission and an auxiliary device, and the roller is its main working component.
The type of calender varies depending on the number of rolls and the arrangement. Among them, the three-roll calender and the four-roll calender are the most commonly used; the two-roll calender and the five-roll calender are used less, and the rolls are arranged in an I-shape, an F-shape, an L-shape, a Z-shape, and an S-shape. Or several types such as oblique Z-shape. The three-roll calender has a delta-shaped arrangement.