In so many complex factors constraints, injection molded products appear on the inevitable defects, therefore, seek the defects inherent mechanism and prediction products may cause defects location and type of mold and used to guide the design and improvement, induction defects law emerges formulate a more rational process operating conditions is particularly important. Injection molding process of the plastic material properties, mold construction, injection molding and injection equipment are three main factors to explain the mechanism of injection molding defects and solutions will affect us. Plastic injection molding products raw common defect classification injection molding process used in diverse types and forms of mold design is varied, in addition, the operating skills of workers and workers' familiarity with the injection molding machine for a particular between the practical experience Differences also vary, while the objective environment (such as ambient temperature, humidity, air cleanliness) also changes with the seasons, these objective and subjective conditions together determine the injection molding to produce products defects. An excellent mold designers are: to meet customer requirements under the premise of low cost, small difficulty of processing, the processing time is short. To do this, not only to fully digest the customer's request, also requires the injection molding machine for mold designers, mold structure and processing technology as well as the factory's processing capacity, etc. should be understood. Therefore, as a mold designers, mold in order to improve the design level, should do the following points: 1. understand each mold design in every detail, to understand the role of each part of the mold; 2. Multi-designed reference some previous similar designs, and understand its situation at the factory color injection mold processing and production, and which experiences and lessons learned; 3. to know more about the working process of these two-color injection molding machine injection molding, plastic injection molds and to deepen relations machine; 4. Under the factory for processing color injection phones, understanding the characteristics and limitations of each processing technology; 5. Understand your own design of the mold die tryout results and change the situation, to learn; 6. design maximize the use of previously successful mold structure; 7. learn more about the impact of these products into the water mold pieces produced; 8. examine some special mold structure, the latest tooling technology. Double injection mold _ _ double injection provided by Karen Xin Hengxin multicolor multicolor Technology Limited. Karen multicolor Xin Technology Co., Ltd. (www.szhxds.cn) strong, credible, in Shenzhen, Guangdong plastic mold industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving Hengxin innovative ideas will lead into the brilliant multi-colored and you work for a better future!