1. When a rubber product is formed, it is pressed by a large pressure, which cannot be eliminated due to the cohesive force of the elastomer. When forming and releasing the mold, it often produces extremely unstable shrinkage (the shrinkage rate of rubber varies due to different types of rubber) , it takes a period of time to stabilize. Therefore, at the beginning of the design of a rubber product, regardless of the formula or the mold, it is necessary to carefully calculate the coordination. If not, it is easy to produce unstable product dimensions, resulting in low product quality.
2. Rubber is a hot-melting thermosetting elastomer, while plastic is a hot-melting and cold setting. Due to the different types of sulfides, the temperature range for molding and curing of rubber is also quite different, and it may even be affected by climate change and indoor temperature and humidity. Therefore, the production conditions of rubber products need to be adjusted appropriately at any time. If not, there may be differences in product quality.
3. Rubber products are mixed rubber made of rubber raw materials after mixing with an internal mixer as raw materials. During rubber mixing, the formula is designed according to the characteristics of the required rubber products, and the required product hardness is determined. The product is made and molded by a rubber flat vulcanizing machine. After the product is formed, the final flashing treatment is carried out to make the surface of the product smooth and free of burrs.
4. The aging test of rubber products belongs to the category of aging test. Rubber aging refers to the phenomenon that the performance and structure of rubber and products are changed due to the comprehensive action of internal and external factors during the processing, storage and use of rubber and products, and then lose their use value. It is manifested as cracking, sticking, hardening, softening, chalking, discoloration, mildew and so on.
