Introduce the process flow of SMC production

　　The process flow of SMC production mainly includes resin paste preparation, pasting operation, fiber cutting settlement and impregnation, resin thickening, and other processes. The process flowchart is as follows:

　　(1) There are two methods for preparing resin paste and pasting operation - intermittent method and continuous method. The intermittent method procedure is as follows:

　　① Pour unsaturated polyester resin and styrene into the batching kettle and stir evenly;

　　② Pour the initiator into the batching kettle and mix well with the resin and styrene;

　　③ Adding thickeners and release agents under stirring;

　　④ Add fillers and low shrinkage additives under low speed stirring;

　　⑤ Stop stirring until the ingredients listed in the formula are dispersed and let stand for use. The continuous method is to divide the resin paste in the SMC formula into two parts, namely thickener, mold release agent, some fillers, and styrene as one part, and the other components as the other part. After measuring and mixing them separately, they are sent to the corresponding storage container set on the SMC unit. When needed, they are measured by a pipeline metering pump and enter a static mixer. After mixing them evenly, they are transported to the upper paste area of the SMC unit and then coated on the polyethylene film.