Advantages of hot runner system for plastic injection mould. Hot Runner Mold, its structure is roughly the same as that of the pin point mold, the biggest difference is that the runner is in one or more hot runner plates and hot nozzles with constant temperature, there is no cold material demoulding, and the runner and gate are directly on the product, so the runner does not need to be demoulded. This system, also known as no gate system, can save raw materials, suitable for expensive raw materials, higher product requirements, difficult design and processing, and high mold cost.
The hot runner system is mainly composed of hot sprue sleeve, hot sprue board and temperature control electric box. Our common hot runner system has two forms: single-point hot gate and multi-point hot gate. The single-point hot gate uses a single hot gate sleeve to shoot the molten plastic directly into the mold cavity, it is suitable for the plastic mold with a single cavity and single gate, and the multi-point hot gate branches the melting material into each sub-hot gate bushing through the hot sprue plate and then into the mold cavity. it is suitable for single-cavity multi-point feeding or multi-cavity moulds.
Advantages of hot runner system.
1, The main results are as follows: No nozzle material, no post-processing, so that the whole forming process is completely automated, working time is saved and work efficiency is improved.
2, the pressure loss is small. The temperature of the hot sprue is equal to that of the injection molding machine nozzle, which avoids the surface condensation of the raw materials in the sprue and reduces the injection pressure loss.
3, the repeated use of nozzle material will degrade the plastic performance, but the use of hot runner system without nozzle material can reduce the loss of raw materials and reduce the product cost. In the cavity, the temperature and pressure are uniform, the stress of the plastic part is small, and the density is uniform. Under lower injection pressure and shorter molding time, the injection molding product is better than the general injection molding system.For transparent parts, thin parts, large plastic parts or high requirements plastic parts can show its advantages, and can use smaller models to produce larger products.
4, the thermal nozzle adopts standardized and serialized design, equipped with various nozzles to choose from, and has good interchangeability. The electric heating ring with unique design and processing can achieve uniform heating temperature and long service life. The hot runner system is equipped with hot runner plate, temperature controller, etc., with exquisite design, various types, easy to use, stable and reliable quality.