According to G3 comprehensive report, there are two kinds of profiles, one is all-plastic profiles, and the other is composite profiles made of plastic materials and non-plastic materials. According to the degree of hardness of profile, it can be divided into soft profile and hard profile. According to the classification of plastic varieties, it can be divided into: PVC profile, ABS profile, PE profile, etc., most of which are PVC profiles. According to the cross-section characteristics, the profile can be divided into 7 categories: profile pipe, hollow profile, plug profile, open profile, segmented profile, inlaid profile and solid profile. Due to the huge market demand and broad development prospects, plastic profile has developed rapidly in China in recent years. Due to the fierce market competition, all plastic machinery manufacturers are considering a problem: how to improve the productivity and qualified rate of plastic profile products on the premise of ensuring product quality,