Hot runner technology, with its unique technical advantages such as cost saving and shortening molding cycle, has become an important direction for the development of plastic injection molding process. In Europe and the United States, most injection molding production relies on hot runner technology, but in China, there are very few companies that adopt 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 suitable hot runner manufacturers?
The injection pressure loss in the hot runner system cannot be ignored. Many hot runner mold users have a misconception: the plastic melt located in the hot runner is always hot, so the injection pressure loss of the hot runner is much smaller than that of the cold runner. In fact, in order to meet the needs of hot runner structure design, the flow distance of the melt in the hot runner system will be greatly increased, so the injection pressure loss in the hot runner system cannot be underestimated. In practical applications, due to the excessive injection pressure loss in the hot runner system, there are many cases of injection molding difficulties, so CAE software should be used for flow channel analysis and calculation for processing plastics with poor fluidity (such as PC, POM, etc.), the flow distance of the melt in the hot runner system, and the large weight of the parts.
