Talking about the production technology of industrial rubber roller

The production process of rubber rollers generally follows several processes of rubber material preparation, rubber roller forming, rubber roller vulcanization, and surface treatment. So far, most enterprises are still manual-based intermittent unit-type production. In recent years, with the continuous development of technologies such as injection, extrusion and winding, rubber roller forming and vulcanization equipment has gradually stepped into the fast lane of mechanization and automation. Thus, the continuous production from the rubber compound to the molding and vulcanization process is realized, the production efficiency is doubled, and the working environment and labor intensity are greatly improved. Since the rubber surface of the rubber roller is not allowed to have any impurities, blisters and air bubbles, it is also not allowed to have scars, defects, grooves, cracks and local sponges and different soft and hard phenomena. Therefore, only if the rubber roller is kept clean and meticulous in the whole production process, and realizes the unified operation and technical standardization, can the quality of the batch products be guaranteed. At present, the bonding, pasting and injection molding of rubber and metal core, vulcanization grinding and other processes have become high-tech processes.

Rubber roll forming is mainly to paste coated rubber on the metal core. The commonly used methods include wrapping method, extrusion method, molding method, injection method and injection method. At present, most domestic enterprises are mainly based on mechanical or manual pasting and molding, and most foreign countries have realized mechanical automation. Large and medium-sized manufacturing enterprises basically use profiling extrusion, which is produced by continuous pasting of extruded film or continuous winding of extruded rubber strips. At the same time, during the molding process, the microcomputer automatically controls its size and appearance, and some can also be formed by the method of extruder right angle and special-shaped extrusion.

The use of profiling extrusion and microcomputer automatic control molding method can eliminate possible bubbles and reduce labor intensity to the greatest extent. For the process of wrapping and sticking, in order to prevent the deformation of the rubber roller during vulcanization and prevent the generation of air bubbles and sponges, a flexible pressurization method is also used externally. Usually, several layers of cotton or nylon cloth are wrapped around the outer surface of the rubber roller, and then fixed and pressed with steel wire or fiber rope.

For small and micro rubber rollers, various production processes such as manual lamination, extrusion, injection, injection and pouring can be used. In order to improve production efficiency, most of the molding methods are now used, and the precision is much higher than that of the non-molding method. Injection pressing, injection of solid rubber and pouring of liquid rubber have become the main production methods

For the rubber roller, the mixing of the rubber compound is the key link. There are more than 10 kinds of rubber materials for rubber rollers, ranging from natural rubber, synthetic rubber to special materials, with a rubber content of 25% to 85%, and a hardness of soil (0 to 90) degrees, spanning a wide range. The conventional method is to use an open rubber mixer to mix and process a variety of masterbatches. The so-called rubber mixing machine is a rubber mixing machine with exposed rollers used by rubber factories to prepare and mix rubber or to heat, plasticize and shape the rubber. But these are a kind of plastic mixing equipment. In recent years, enterprises have switched to intermeshing mixers to produce rubber compound by segmented mixing.

After the rubber material is uniformly mixed, it is necessary to use a rubber filter machine to filter the rubber to eliminate impurities in the rubber material. Then, the calender, extruder and laminating machine are used to form films or strips without air bubbles and impurities for rubber roller forming. Before forming, these films and strips are also subject to strict visual inspection, and the fresh surface is kept to prevent sticking and extrusion deformation. There should be no impurities and bubbles in the rubber on the surface of the film and rubber strip, otherwise sand holes may appear when the surface is ground after vulcanization.