Successful use of hot runner systems, the most critical factor is the mold manufacturer basis having its own needs, choose the right hot runner products.
A variety of hot runner system is one important difference between the melt heating method can be divided into two kinds of internal and external heating. As the name suggests, the internal heating system is to direct heater installed in the melting Road, from the internal heating; while the external heating system that is in the external heating of raw materials, so that there are no obstacles in the case of raw materials flowing through channels. An external heating system resolved the melt channel of the dead, and place the shear curve of melting tract are more reasonable.

    Hot runner injection molding machine nozzle system is an extension of the raw material to be evenly transmitted to each sprue, the most effective way is to install a balanced shunt plate, to ensure that every one from the injection point to the melt flow length of the membrane cavity and the flow channel dimensions are equal. This mechanical balance of design, to ensure filling the balance of each product at the same time to avoid flash and short shots from happening.

   Different melting Road will directly affect the size of hot runner performance. Melting Road, inappropriate size, will lead to plastic degradation, or injection molded parts caused by the uneven or incomplete filling, and the slow change color. Mold manufacturer in determining the size of melting Road, must be considered when the pressure drop, residence time, temperature, shear rate and frequency of changing color and other factors.

    After the decision of the type of system, then we must choose the right type and speed of filling the gate. Gate type is a wide range of factors to consider include: allowing the gate marks, gate location and type of injection molding materials. Both non-crystalline or crystalline plastics, different gate types are specific restrictions on raw materials. Most of the hot runner systems can match the different sizes of hot mouth, each hot-filled mouth can provide a specific rate. Gate is too small will limit the plastic filling, and may generate excessive shear led to material degradation.

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