Gating system design

In the design of injection moulds, the design of the gating system is of utmost importance. Which is mainly composed of the main flow channel, splitter channel, gate, and cold material cavity. The function is to pass molten plastic through the nozzle of the injection moulding machine. Enter the mould cavity through the pouring system under high temperature, high pressure, and high speed. And then cool and maintain pressure to form the product. The mould pouring system is an indispensable part of the plastic product production process. And its design directly affects the quality and production efficiency of the product. Especially for precision injection molds, the design of the gating system is even more crucial.

The importance of designing the injection mould pouring system lies in its impact on product quality. A reasonable pouring system design can ensure the uniform flow of plastic materials in the mould, avoid defects such as bubbles and fusion lines. And thus ensure the integrity of the product’s appearance and internal structure. Meanwhile, by optimizing the design of the pouring system.

The main principles of gating system design:

• 1.The design of the mould pouring system needs to consider the improvement of production efficiency. An efficient gating system design can accelerate the injection moulding cycle and improve production efficiency. By reasonably selecting the position and quantity of pouring ports, optimizing the design of flow channels and cooling systems.

• Reduce waste and loss. For example, designing flow channels and cooling systems reasonably can reduce thermal energy loss and material loss. And reduce production costs. At the same time, selecting the position and quantity of the pouring port reasonably can reduce the scrap rate and improve production efficiency.
• Reduce flow resistance to ensure that the plastic is not obstructed during the flow process. The form and position of the gate should be consistent with the flow direction of the plastic to reduce flow resistance and improve mould filling efficiency.
• In some cases, the pouring system requires the design of an exhaust device to exhaust air and volatile substances from the mould cavity. And molding of plastic due to gas obstruction.

In summary, in the design of the injection mould pouring system, the above main principles should be followed to ensure that plastic can smoothly and evenly fill the mold cavity, and improve the efficiency and quality of the injection molding process. In specific practice, comprehensive consideration should be given to factors such as the type of plastic, the structure of the mould, and production requirements to achieve the best design effect.