What are the common problems in precision injection mold design?
Time:
2022-10-24
(1) The shrinkage rate of plastic materials is not uniform. The natural environment for making high-precision injection molds must be ultra-high pressure to melt plastic, and then introduced into the core of high-precision injection molds.
(1) The shrinkage rate of plastic materials is not uniform. The natural environment for making high-precision injection molds must be ultra-high pressure to melt plastic, and then introduced into the core of high-precision injection molds. Collapse occurs in the whole process of liquid plastic cooling into solid. Therefore, the shrinkage of plastic must be fully considered in the design of high-precision injection mold.
(2) High precision injection molds with different tolerance marks and different proportions will result in different proportions of commodities. A high tolerance mark means that the manufacturing process of high precision injection molds is relatively complex, while a low tolerance mark means that the precision of high precision injection molds is not high. Therefore, it is crucial to consider the dimensional tolerance of the mold shell in the design of high-precision injection molds.
(3) The coefficient of thermal expansion of plastics is different. The coefficient of thermal expansion of plastic raw materials is different, and the appearance and size of plastics after refrigeration are immediately damaged by the coefficient of thermal expansion. Therefore, in the design of high-precision injection mold, the thermal expansion coefficient must be taken into account, and the specifications of high-precision injection mold must be designed and adjusted immediately according to the change of specific conditions.
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