The calender is composed of two or more rollers, arranged according to the heating method, which can be divided into cold pressing and hot pressing, cold pressing is suitable for materials that do not need heating, such as graphite film, graphite sheet, absorbing material, shielding material, magnetic material, non-ferrous metal material, etc., hot pressing, water splitting heating, electric heating, oil heating and electromagnetic heating, it is a film that presses and coats rubber, silicone, silicone rubber, phase change material, PTFE or plastic into a certain thickness and surface shape at a certain temperature, And the machine that can bond fiber curtain canvas or steel cord fabric.

       Nine precautions for using a calender:

1. In the process of calender commissioning and trial production, the speed shall not exceed 60 m/min, and the production shall not be fully loaded.

2. One month after the trial production of the new calender, all lubricating parts must be cleaned, the lubricating oil must be replaced, the wear and tear of the working transmission parts must be checked, and the worn parts must be replaced.

3. After the calender is in normal production, the motor is not allowed to work under overload for a long time (the problem of instantaneous overload is OK).

4. During normal production, the return oil temperature of the rolling bearing lubricating oil should be controlled below 110 degrees, and the copper content in the return oil should be checked frequently, and when the content increases, the cause should be identified and eliminated in time.

5. Except for special circumstances, the emergency stop switch shall not be pressed; In order to facilitate the removal of residual materials, start and reverse are allowed (starting and reversing time is not more than 2min), in order to avoid scratching the surface of the roll, only copper or bamboo knife tools can be used to clean the melt.

6. Only when there is storage between the two rollers, the enterprise is allowed to use the operation of fine-tuning the roller distance.

7. Only in the production of materials thickness is generally less than 0.2mm products, can the use of shaft cross protection device, when adjusting the shaft cross analysis device, with the working face service center of the roller as the axis, the two ends of the roller to the opposite direction of the development and movement of the cross, the axis cross research angle is not more than 1 degree, and the amount of left and right movement should be as symmetrical as possible.

8. When there is material storage between the drums, the drum pretensioning device should be used, after the shutdown, in order to avoid scratching the surface of the drum, the distance of the drum should be adjusted first, and then the drum should be loosened, special attention should be paid to the fact that the roller body must be heated and cooled during the operation, otherwise it may lead to the deformation of the roller body, after stopping the feeding, the drum should continue to run, the drum spacing should be opened to 2-3mm, and the drum body should be cooled before stopping80 ℃，If there is an emergency stop, the distance of the drum must be opened immediately so as not to hit the surface of the drum, the emergency stop device cannot be used for normal production, and the circulation of the lubricating oil circuit system can only be closed after the roller stops running.

9. The operator of the four-roller calender should not put pens, mobile phones and other items in the jacket pocket, so as not to fall into the roller body during operation, causing damage to the roller surface or product, should not use metal objects to scratch or emboss the surface of the cylinder, when pulling the film from the unwinding roller to the embossing device, be sure to carefully pull from both sides, and fasten the upper and lower cuffs to prevent accidents.

In addition, the roller shall not be stored in the open air after being removed, one can prevent the surface of the roller from being damaged due to wind and sand, and the other is in winter, to prevent the water in the roller from freezing and damaging the roller, and generally should be stored above 5 °C data, and attention should be paid to effectively preventing different rusts on the surface of the roller body during storage.