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The thickness of the wall depends on the external force to be borne by the product, whether it is used as a support for other parts, the number of columns to be borne, the number of projections, and the selection of plastic materials. The wall thickness design of general thermoplastic should be limited to 4mm. From an economic point of view, product design with excessive thickness not only increase...
General specification for plastic mold cooling system. Generally speaking, we should pay attention to the following points.1. Cooling nozzles are all made of copper quick-connect nozzles. The standard of use is coiled JJPS2 quick-connect. If the contract has special requirements, the contract stipulates.2. the cooling nozzle can not extend the surface of the template in principle, and the surface o...
In addition to the original air in the cavity, there are low molecular volatile gases produced by heating or solidification of plastics, which must be considered to be discharged sequentially. Generally speaking, for complex mold, it is difficult to estimate the exact location of gas resistance in advance. Therefore, it is often necessary to confirm its position by trial mode and then open the exha...
1. manufacturing tolerances for molded partsTherefore, the precision of the molding dimension should be higher than the relative accuracy of each dimension of the product. Generally, the mold manufacturing error takes one third or one quarter of the dimensional tolerance of the plastic parts.2. effect of molding shrinkageIt includes the difference between the calculated shrinkage rate and the actua...
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