Junlin Mechanical Calender Production Line Complete Customization

Definition of calendering effect
In the process of calendering, when the material passes through the gap of the calendering roller, it will be subjected to the simultaneous action of shear force and tensile stress, and the polymer will be oriented along the calendering direction, so that the product has anisotropic characteristics in physics and mechanics.
The consequences of the calendering effect
The calendering effect causes differences in the properties of the products, one of which is that the longitudinal tensile strength (along the calendering direction) of the calendering film (sheet) is greater than the transverse tensile strength, so that the transverse elongation at break is greater than the longitudinal. When the use temperature change is too large, the size in each direction will change, the longitudinal will shrink, and the more serious is the rupture, then the horizontal and thickness direction of expansion. This is the product in the physical and mechanical anisotropy.
Factors influencing the size of calendering effect
Calendering temperature, roll speed to speed ratio, roll gap storage, product thickness, material properties, speed ratio between lead roll, cooling roll and winding roll, etc

Types of calender
Calender is the key equipment in calender production. The number of rolls of the calender, at least three rolls, also four or five rolls; Three and four rollers are the most common. Five rollers are mainly used in the production of hard sheets, and are generally used less. The rollers are arranged in triangular shape, L shape, inverse L shape, positive Z shape, oblique Z shape, straight line and so on.
The structure of the calender
The calender is mainly composed of body, roll, roll bearing, roll distance adjustment device, stop device, cutting device, transmission system, safety device and heating and cooling device. The body mainly plays a supporting role, including the frame and the frame, and is also used for back-up rollers, bearings, regulating devices and other accessories. The roller plays the role of calender forming and is the most important part in the calender. Of course, the main heating and temperature control device, cooling device, lead off winding device, conveyor belt, cutting device, metal tester, beta ray thickness gauge, as well as shaft crossing device, prestress device, etc., these are also very important parts in the calender.

The complete calender molding process can be divided into two stages: feeding and calender. The feeding stage is the preparation stage of calender, which mainly includes the preparation, mixing, plasticizing and feeding transmission to the calender. Therefore, the calendering process is actually a complete continuous production line starting from the raw material and going through various polymer processing steps. The control of calendering process is mainly to determine the operating conditions of calendering, which includes roll temperature, roll speed, speed ratio, storage amount, roll distance, etc., which are interrelated and restricted.