There are three main types of hot runner molds available: hot tip type, pouring sleeve type, and valve needle type. Each type can be further subdivided into many families. The cross-sectional diameter of the runner in a hot pointed nozzle can range from 4 millimeters to 16 millimeters, and the nozzle is also made into different sizes. There are also many variants of nozzle gate inserts to meet different application requirements, so the more diverse the hot runner system types from general suppliers, the better. This can have greater selectivity for hot runner components, and the variety, size, weight, and application range of plastic parts produced with hot runners are also wider, which is more conducive to optimizing the injection molding production process and product quality.

When processing plastic products in the injection molding process, the hot runner system and hot runner mold work under high temperature and high pressure load conditions. There are many factors that cause the failure of hot runner mold components, and injection molding technology is mainly used for mass production of plastic parts; If there is any shutdown phenomenon, the economic losses will be very serious. So the product quality and reliability of hot runner molds are very important. Customers should have a deep understanding of the product quality and application history of the hot runner components produced by the hot runner supplier during on-site inspections. Some excellent hot runner manufacturers have obtained ISO quality standard certification from international organizations.

With the development of hot runner technology, there are several development trends for components

1. Miniaturization of parts can realize the filling of small products with the first mock examination and multiple cavities and large products with multiple gates. By reducing the nozzle space, more cavities can be configured on the mold to improve the output and utilization of the injection molding machine

2. Standardization of parts is beneficial for reducing the repetition of design work and reducing mold costs, as well as facilitating the replacement and maintenance of vulnerable parts. It meets the increasingly short mold design and manufacturing cycle requirements of users

3. Improved overall reliability of pressure distribution, temperature distribution, and sealing design

4. The temperature control system is precise to prevent resin overheating and degradation, as well as product performance degradation

5. Improve the wear resistance of the nozzle and hot runner, as well as the formation of sensitive materials