Hot runner technology is an advanced technology applied to the pouring runner system for plastic injection mold assembly use, and it is a hot direction in the development of plastic injection molding technology. The so-called hot runner molding means that the plastic sent from the injection machine nozzle to the gate is always in a molten state, and does not need to be cured as a waste at each mold opening, and the molten material remaining in the pouring system can be injected into the cavity when it is injected again.
What benefits can hot runner technology bring us? Friends who are familiar with the injection molding process know that conventional injection molding often has the following adverse factors:
1, mold filling is difficult.
2, the deformation of thin-walled large parts.
3. Waste of raw materials in sprue.
4, the quality of injection parts of multi-cavity molds is different. The emergence of hot runner technology provides a more perfect solution to these problems, in general, the use of hot runner has the following benefits:
1 Save raw materials, reduce into.
2 Shorten the molding cycle and improve the machine efficiency.
3 Improve the surface quality and mechanical properties of products.
4 The point gate can be used without using a three-plate mold.
5 Individual products can be economically formed with side sprue.
6 Increase the degree of automation.
7 Use needle valve gate to control gate freezing.
8 The quality of the injection parts of the multi-cavity mold is consistent.
9 Improve the appearance of injection molded products.
However, every technology has its own shortcomings, and hot runner technology is no exception:
1 The mold structure is complex, the cost is high, and the maintenance cost is high.
2 It takes a period of time for the process to be stable, resulting in more waste products at the offer price.
3 Melt leakage and heating element failure have a great impact on product quality and production schedule.
The third disadvantage above, in particular, needs to be noted, by purchasing high-quality heating elements, hot runner plates and nozzles and careful maintenance when using, can reduce the occurrence of these adverse conditions.
The hot runner is composed of four parts: hot runner plate, nozzle, heating element and temperature controller. The above mentioned so many hot runner benefits, then whether each pair of mold can use hot runner? The answer is no. In general, hot runner technology is only suitable for plastic molds, and it is not suitable for every plastic mold.
Zhejiang Ceeto Mold Co.,Ltd.
