1. Raw material preparation

The main materials of mixed rubber products are raw rubber, compounding agents, metal materials and fiber materials. Among them, raw rubber is the basic material; compounding agents are auxiliary materials added to improve certain properties of rubber products; metal materials (steel wire, copper wire) and fiber materials (cotton, hemp, wool and various artificial fibers, synthetic Fiber) is used as the skeleton material of the compound rubber product to enhance the mechanical strength and limit the deformation of the product. In order to make the raw rubber and the compounding agent mix with each other evenly, some materials need to be processed, so in the process of raw material preparation, the ingredients are weighed accurately according to the formula.

2. Plasticizing

  Raw rubber is elastic and lacks processing performance (plasticity), so it is not easy to process. In order to improve its plasticity, it is necessary to masticate the raw rubber; in this way, the compounding agent is easy to be evenly dispersed in the raw rubber during mixing; at the same time, it also helps to improve the permeability of the rubber during the calendering and molding process (penetration fabric) and molding fluidity. The process of degrading the long-chain molecules of raw rubber to form plasticity is called mastication. There are two methods of raw rubber mastication: mechanical mastication and thermal mastication. Mechanical mastication is to degrade and shorten the long-chain rubber molecules through the mechanical extrusion and friction of the masticator at a not too high temperature, and change from a highly elastic state to a plastic state. Thermoplastic refining is to pass hot compressed air into the raw rubber, under the action of heat and oxygen, the long-chain molecules are degraded and shortened, thereby obtaining plasticity.

3. Mixing

  Mixing is a process in which the masticated raw rubber and compounding agent are mixed, placed in a rubber mixer, and the compounding agent is completely and evenly dispersed in the raw rubber through mechanical mixing. Mixing is an important process in the production process of rubber products. If the mixing is not uniform, the performance of the product will be affected, and the role of rubber and compounding agents cannot be fully exerted. The rubber compound obtained after mixing is called compound rubber. It is a semi-finished material for making various compound rubber products, commonly known as rubber compound. It is usually sold as a commodity. Buyers can use the rubber compound to directly process and vulcanize it. Required rubber products.

4. Forming

  In the production process of compounded rubber products, the process of pre-forming various sizes and shapes by using an extruder or a calender is called molding.

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