The air pressure or oil pressure of the control valve needle is suitable

Compared with the traditional cold runner, it has the following advantages: 1. Small, the product obtains less deformation, better product surface quality and mechanical properties, and can show its superiority for transparent parts, thin parts, large parts or plastic parts with special requirements (such as engineering plastic parts). It consists of three parts: hot nozzle, manifold and temperature controller. If the pressure is too small, the valve needle will not move or the movement will not be in place.The working principle and function of heat flow

First, the working principle of the hot runner system: The hot runner system is mainly composed of a splitter plate, a hot nozzle and a temperature control box. The air pressure or oil pressure of the control valve needle is suitable. Shortening the molding cycle and greatly improving production efficiency. 5, after special design, can form small pitch multi-cavity products and low pressure injection molding. The designed flow channel and the hot nozzle are directly delivered to the mold cavity, which effectively reduces the pressure of the flow channel (so a smaller injection molding machine can be used to save costs), the melt fluidity is improved, the material density is uniform, and the internal stress of the product is reduced. It uses the system of heating and precise temperature control of the injection molding material to pass the molten plastic material through precision.. 5. In addition to the accuracy of the main factors that determine the quality of the hot runner system, there are many other key factors, as follows: 1, accurately control the plastic temperature to prevent material degradation.

Another feature of the hot runner system is that the hot nozzle directly injects the molten plastic material into the mold cavity, and the automatic breakage is naturally formed during the demolding process, eliminating all or most of the sprue waste from the conventional injection process. 7, improve the appearance of the product, greatly improving the quality of the product. Second, the role of hot runner: Hot runner system is a new, scientific injection molding system. 2, reduce the injection pressure, clamping force, greatly improving the life of the mold. Generally divided into open and needle valve two categories. 2, the flow path is highly clean and free of dead ends, ensuring rapid color change, preventing material degradation and improving efficiency. 8, using needle valve type hot nozzle, step-by-step injection molding, can form difficult precision basket mould suppliers  plastic products. 3, to ensure the dimensional accuracy of the hot runner and the tolerance with the mold to prevent leakage. 3, reduce the stress of plastic parts, reduce deformation, and greatly improve product consistency. No post-processing is required, and a large amount of material is saved. Therefore, the hot runner system has been widely used in foreign countries and has been used as one of the promotion technologies for future injection mold development in China. Balance the flow channel to ensure uniform and rapid filling of each cavity. If the pressure is too large, the hot nozzle and the mold may be damaged. 4. 6, the product no water discharge, greatly reducing production costs. In general, the use of a hot runner system during the injection process can save 10% to 20% of raw materials, reduce costs by about 30%, and increase investment by only 10% to 30%. More importantly, material and energy conservation is more important to protect the environment. 7. It passes through the plastic in the flow path and remains in a molten state from the barrel nozzle directly to the mold cavity. 4, provide more molding process parameters, can accurately control the quality of the product. The valve needle is closed and opened in time, and the action is flexible to prevent the flow of the glue inlet. In addition, since the additional heat generated by the waste is eliminated, the cooling time of the mold is only the cooling time of the plastic part, the molding cycle is shortened, and the automation degree and production efficiency of the production are improved. 6, choose the hot nozzle scientific and reasonable, to ensure the smooth flow of plastic and the cavity is fully filled. The hot runner system is a sophisticated, complex injection molding system