Hot runner system
Hot runner system, also known as hot runner system, mainly consists of hot runner sleeve, hot runner plate, temperature control electric box.Our common hot runner system has two forms: single point hot runner and multi-point hot runner.A single hot gate is used to inject molten plastic directly into the mold cavity with a single hot gate sleeve.The multi-point hot gate is used to branch the molten material into each sub-hot gate sleeve and then into the mold cavity through the hot runner plate. It is suitable for single-cavity multi-point feeding or multi-cavity mold.
Advantages of the runner system
(1) no water port material, do not need post-processing, the whole molding process is fully automated, save working time, improve working efficiency.
The pressure loss is small.The hot runner temperature is equal to the nozzle temperature of the injection molding machine, which avoids the surface condensation of the raw material in the runner and reduces the injection pressure loss.
The reuse of nozzle material can make plastic property degradation, and the use of hot runner system without nozzle material, can reduce the loss of raw materials, so as to reduce the cost of products.The temperature and pressure are even in the mold cavity, the stress of the plastic parts is small and the density is even.For transparent parts, thin parts, large plastic parts or high demand plastic parts can show its advantages, and can produce larger products with smaller models.
Of hot nozzles use standardized, serialized design, with a variety of optional nozzle head, good interchangeability.Specially designed and processed electric heating ring can reach even heating temperature and long service life.The hot runner system is equipped with hot runner board, temperature controller, etc.
The deficiency of hot runner system application
(1) the overall mold closure height increased, due to the installation of hot runner plate, mold overall height increased.
The heat radiation is difficult to control, the biggest problem of the hot runner is the heat loss of the runner, is a major problem to be solved.
The existence of thermal expansion, thermal expansion and cold contraction is our design to consider the problem.
Of mold manufacturing costs increase, hot runner system standard accessories price is higher, affect the popularity of hot runner mold.
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If you want to get more plastic mould information,please visit to http://www.smartmoldtech.cn or mail to david.wang@smartmoldtech.com. Welcome send us drawings or samples, we will quote the best price and give professional advices. We can also design drawings for customers upon required informaiton. Thanks !
