Most customers still hold a wait-and-see attitude towards this technology. In the mid-1980s, hot runner molds in the United States accounted for 15% to 17% of the total number of injection molds, about 10% in Japan, and 12% to 15% in Europe; by the 1990s, hot runner molds in the United States accounted for More than 40%, in large-scale product injection molds, the proportion of hot runners is as high as 90%. As some European and American companies come to China to purchase molds, it has promoted the gradual promotion of hot runner technology in China.. Hot runner, that is, the melt in the mold pouring system is always in a molten state during the injection molding process and does not solidify, does not produce pouring aggregates, and does not need to clean the gate mold composition system after molding the product.With the continuous improvement of injection molding technology and people's pursuit of high-precision plastic products, traditional cold runner molds can no longer meet the demand and cannot meet the precision requirements of modern products.
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With the development of the polymer industry, hot runner technology is constantly improving and accelerating its popularization. The use of hot runners can not only make the product more beautiful, save raw materials, and increase production efficiency, but also can increase the service life of the mold at least 5 times. At present, companies such as DME in the United States and MOLD-MASTERS in Canada are vying to introduce new hot runner systems.　　

In the processing of plastic products past 30 years, injection molders have successfully realized the processing of various materials for different purposes with the incomparable technical advantages of the hot runner system, involving various fields from general-purpose resins to engineering resins. The mold determines the quality of the product to a large extent. Due to the improvement of customers' aesthetic requirements for products, gate quality has become increasingly important.　　In China, the real promotion of this technology is only what happened in recent years.　　 The popularity of hot runner technology in China is not high due to many reasons. At the same time, market competition has led to lower product prices, prompting injection molders to change colors faster while improving product quality, all of which determine the extensive customer demand for hot runners