Mr. Chan
Leave a messageIt is to point to the precision of molding parts and surface quality requirements are a very high process. Also, some people think, precision injection moulding is the plastic part of the size accuracy to achieve 0.01 ~ 0.001 mm injection molding process. In recent years, with electronic, medical, communications, automotive, and other industries. With the rapid development of plastic products of high precision, high-performance requirements increasing. The traditional plastic molding process has been difficult to meet the requirements of the current high standards. At the same time, injection molding is one of the most important plastic molding methods. Therefore, precision injection molding technology is getting more and more get the attention from people, make the precision injection moulding technology constantly progress, new technology constantly emerging.
Precision injection moulding for products not only has high dimensional precision, lower buckling deformation, good transfer characteristics. But also should have excellent optical performance and so on. Therefore, it is for injection molding machine, mold, injection molding technology, performance and the formula of raw material and so on all have special requirements, there are many factors which can affect the precision injection moulding.
1) Shrinkage of plastics: Shrinkage of plastics should be considered when designing precise plastics products.
(2) Shape and size of products: The shape and size of plastic parts have a great influence on the precision of products. Production practice shows that the more complex the shape and size of products are, the lower the precision will be.
(3) Mold structure: The precision of injection parts is closely related to the number of mold cavities and production batch. It also shows that the precision of a single-cavity mold structure is higher than that of a multi-cavity mold structure, and the precision of small-batch production is higher than that of large-batch production.
(4) Mold processing accuracy: Because the injection products must be molded in the mold cavity. The precision of the products will not exceed the precision of the mold cavity in any case. In general, injection products accuracy than the molding accuracy of one or two tolerance grade. As far as mold manufacturing technology is concerned. The mould cavity is mostly made by high-speed milling, grinding, polishing, or electric machining.
(5) Injection molding machine: Due to precision injection molding products have a higher precision requirement. Therefore, they generally need to be carried out in a special precision injection machine. The injection power of the precision injection molding machine should be large, the control precision should be high, the response speed of the hydraulic system should be fast, the mold closing system should have enough rigidity.
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