Inadequate application of the hot runner system (1) to increase the overall height of the mold is closed, due to the installation of the hot runner plate or the like, an increase in the overall height of the mold. (2) thermal radiation is difficult to control, hot runner runner biggest problem is the heat loss is a major issue to be resolved. (3) the presence of thermal expansion, thermal expansion and contraction is an issue to consider when we design. (4) increase in mold manufacturing costs, hot runner system accessories prices higher standard of precision plastic mold, hot runner mold affect the popularity. Synthetic resin is the most important component of plastic plastic mold factory in Shenzhen, and its content in plastics generally 40% to 100%. Due to the large content and nature of the resin often determines the nature of the plastic, so people often put plastic resin as a synonym. Such as polyvinyl chloride resin and PVC, phenolic resins and phenolic confused. In fact, resin and plastic are two different concepts. Resin is a polymer of unprocessed raw Shenzhen plastic mold, it is not only used to make plastics, but also paints, adhesives and synthetic materials. In addition to a tiny percentage of the plastic resin containing 100 percent, the vast majority of plastic, in addition to the main components of the resin, but also need to add other substances. 2, Fillers called filler, which can improve the strength and heat resistance of plastics, and reduce costs. Such as phenolic resin after adding flour can greatly reduce costs and make Bakelite became one of the cheapest plastic, as well as significantly improve the mechanical strength. Fillers can be divided into organic fillers and inorganic fillers. The former such as wood flour, rags, paper and various textile fibers, such as glass fiber which, diatomaceous earth, asbestos, carbon black and the like. Plastic injection mold, die Shun King (certified), Guangzhou Plastic Co. provided by Liaobu Shun King mold. Liaobu Shun King Mold Ltd. (www.shunjingmuju.com/) is an industry leader in Dongguan, Guangdong, mold equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shun King dies in leadership with the staff warmly welcome all inquiries negotiations to create Shun King mold a better future.