Development and classification of rubber calender

A so-called rubber calender is a machine that compacts and stretches the mixed rubber or plastic. The following will introduce you the rubber calender from several different aspects.

Here is the content list:

• The development history of rubber calender.

• What are the necessary working conditions for a rubber calender machine?

• What is the detailed classification of the rubber calender?

The development history of rubber calender.

In 1843, the three-roller rubber calender came out, and then in 1880, the four-roller rubber calender was invented. At present, the production of rubber calenders have been serialized, and each factory can basically produce calenders of various specifications and purposes, but the rubber calenders with super large specifications and ultra-high precision are still blank in many places.

What are the necessary working conditions for a rubber calender machine?

1. The friction angle between the rubber and the roller must be greater than the contact angle of the roller so that the rubber can be pulled into the roller pitch. In the general operation of the rubber calender machine, there is less glue accumulation between the rollers, and the material is evenly supplied, and the contact angle is much smaller than the friction angle. Therefore, under normal circumstances, the rubber material can be pulled into the roller pitch and stretched into shape.

2. The speed ratio of the roller should be within a certain range. If the speed ratio is too large, the friction will generate too much heat. The material speed refining and homogenization effect is not good, which affects the calendering quality of the rubber calender. According to practical experience, the rolling speed ratio before forming is generally 1.3-1.5.

3. To ensure the compactness of the products calendered by the rubber calender, according to the requirements of the rubber material and the product, the rubber material must pass through one or more roller pitches.

What is the detailed classification of the rubber calender?

The rubber calender machine is generally composed of a work roll, a frame, a machine base, a transmission device, a speed, and pitch adjustment device, a roller heating and cooling device, a lubrication system, and an emergency stop device. There are many types of rubber calenders. To meet different technological requirements, there are two, three, and four rolls in total. The two-roller arrangement forms are vertical and horizontal. The three-roller arrangement includes vertical type, L type, triangle type, and so on. There are L-shaped, Z-shaped, and S-shaped four-roller arrangements. The number of rollers and their arrangement has a great influence on the difficulty of various process operations and the quality of the calendered semi-finished products. In terms of process usage, rubber calenders mainly include tablet calenders, rubber rubbing calenders, general calenders, profile calenders, laminating calenders, steel wire calenders, etc.

Rubber calender is an indispensable piece of equipment in the production of tires and conveyor belts. Qingdao Huicai Machine Manufacture Co., Ltd. has developed a variety of rubber calenders. If you are in the rubber calenders, you can consider using our cost-effective products.