The old railway often asks how the smc sheet machine was produced. Most of them only see the final finished machinery. The production process is actually complex. The smc sheet is made of nearly ten kinds of raw materials mixed in a certain proportion, and then made into semi-finished products by large SMC units, which are then molded into final products at high temperature. In this process, changes in any kind of raw materials or production process parameters will have a corresponding impact on the final products. Therefore, the SMC process has high requirements for the stability of raw materials and production process parameters. The smc sheet machine is used in many industries, and plays an important role in automobile, aerospace, construction, sports equipment, electronic equipment, environmental protection engineering and other industries.