There are two kinds of quality of the products

There are two kinds of quality of the products, namely: the quality of the inner material and the quality of the appearance. The quality of the inner material is mainly the mechanical strength, and the magnitude of the internal stress directly affects the mechanical strength of the product. The main reason for the internal stress is the crystallinity of the product and the plastic molding. The orientation of the molecules is determined. The appearance quality of the product is the surface quality of the product, but the internal stress causes the warpage deformation of the product to affect the appearance quality. The appearance quality of the products is: insufficient products, product dents, weld marks, flash, bubbles, silver, black spots, deformation, cracks, delamination and discoloration, etc., all with molding temperature, pressure, flow, time and position. related.