Rubber Belt Manufacturing Process

Do you know the manufacturing process of rubber conveyor belt? Most of the Industrial rubber conveyor belt consists of two layers. The lower layer is known as the carcass and gives it a linear strength and shape. The carcass consists of polyester, nylon and cotton. The top layer is called cover. Various rubber or plastic compounds are used to make the cover. It is mainly used for the transportation of bulk materials in industrial applications.

According to the characteristics of the materials, the cover grades of the conveyor belt can be divided into: general, flame-retardant, energy-saving, heat-resistant, wear-resistant, cold-resistant, acid and alkali resistant, oil resistant type, etc.

How to make a conveyor belt? In general, the manufacturing process of rubber conveyor belts can be divided into 4 processes.

Mixing → Calendaring →Forming → Curing

Rubber mixing and compounding

Mixing is the first step of the rubber conveyor belt manufacturing process.

Rubber is a mixture of a variety of ingredients, but the rubber itself is relatively sticky, and it is difficult to directly mix the various ingredients evenly. It needs to be added to the internal mixer for repeated stirring to be evenly mixed.

The rubber mixing process is essentially a process in which the compounding agent is uniformly dispersed in the raw rubber.

During compounding, the rubber molecular structure, molecular weight and distribution, and the aggregation state of the compounding agent all change. Through mixing, the rubber and compounding agents play a physical and chemical role, forming a new structure.

Rubber calendering /sheeting

Calendering is the second process of the rubber conveyor belt manufacturing process.

Calendering is a popular process because of its ability to precisely adjust the product thickness. Usually, we use a three-roller or four-roller calender machine 4 roller calender machine to press the rubber into and press on both sides of the steel cord/fabric of the conveyor belt to evenly distribute the thickness of the material to ensure that there is no air impurities in the rubber.


The semifinished rubber product obtained by calendering is used to form the required semifinished product with a molding mechanism according to different specifications.

Rotocure vulcanizing presses

Rubber vulcanization is one of the main processes in the processing of rubber conveyor belts, and it is also the last process in the production of rubber conveyor belts.

The semi-finished products made by calendering and molding under certain external conditions, through the action of chemical factors or physical factors, make the rubber conveyor belt have the characteristics of wear resistance, heat resistance, fire resistance, cold resistance and oil resistance. These characteristics enable rubber conveyor belts to be used in different industries.

Through the above-mentioned manufacturing process of the rubber conveyor belt, the finished rubber conveyor belt is manufactured. If you have any questions about the production process of rubber conveyor belts, please contact us.

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