Injection mold molding technology is a commonly used plastic product production method. Many types of plastic products are produced by plastic injection molding machines using plastic injection molding machines. For example, mobile phone shells that are popular among people in our lives are one of them. However, many injection mold manufacturers with inadequate technology use often produce glittering silver lines when using TPU, PC and other materials to make transparent products, which causes the appearance of products to be greatly affected, and the quality of such transparent injection molded parts is high. What are the causes of the problem and how can we solve it?

　　In fact, melt defects such as melt spots, silver lines, cracked polystyrene, and plexiglass injection molding produce silver streaks, clear spots, and cracks. These defects are mainly due to stress in the vertical direction of tensile stress during the injection molding process. The use of weight polymer molecules shows a difference in the rate of completion of the heavy flow and non-oriented portions.