Hot runner technology has become an important direction for the development of plastic injection molding process due to its unique technical advantages (such as cost saving and shorter molding cycle). In Europe and the United States, injection molding production relies on hot runner technology, but in China, few companies use this advanced technology. However, with the further development of China's mold industry, this technology will be gradually promoted and widely used, so how to choose the right hot runner system and the right hot runner manufacturer?
The injection pressure loss in hot runner system cannot be ignored. Many hot runner mold users mistakenly assume that the plastic solution in the hot runner is always hot, so the injection pressure loss in the hot runner is much less than in the cold runner. In fact, in order to meet the needs of hot runner structure design, the flow distance of solution in the hot runner system will be greatly increased, so the injection pressure loss in the hot runner system cannot be observed. In practical application, due to the large injection pressure loss in the hot runner system, there are many reasons for the difficulty of injection molding. Therefore, when processing non-liquid plastics (such as PC, POM, etc.), the melt flows into and out of the large hot runner system, parts with large weight, etc., CAE software should be used for flow calculation