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Four roll calender

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A calender with four rolls. The rolls are arranged in T, L, S, and Z types, with high efficiency and high accuracy.


1 Introduction

In the rubber industry, it is mainly used for the pasting of fabrics, the pasting of steel cords, the pressing of rubber materials, the molding of rubber blanks, the pasting of isolation films and the bonding of multilayer films. Among them, the Z-shaped rollers are arranged reasonably, which can reduce the elastic deformation of the rollers and facilitate the feeding, so it is widely used.

2 working principle

One of the necessary working conditions of the calendering process: the friction angle ρ of the rubber and the roller must be greater than the contact angle α before the rubber is pulled into the roll distance. In the rolling process of the four-roller calender, the rollers work at a certain speed ratio, so that the rubber is further kneaded and the plasticity is increased. After passing through the small roll distance, it is rolled into a film with a certain thickness and width ; Under the action of the pressure of the roller, the film is squeezed on the textile or steel cord. Some need to be pressed into a certain pattern and shape, and some need to combine multiple layers of films with different uses, colors and shapes.

3 basic structure

1. Ordinary calender: The common four-roller calender widely used in China is Φ610 × 1730 "type four-roller calender.

2. Precision calender: In addition to the main parts of the ordinary calender, a series of measures to improve the accuracy of the calender, the speed of the calender and easy operation are also adopted. The main types are: oblique type, S type (Φ700 × 1800), Z type.

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