The ranking design of precision injection mold product ranking is an important step in mold design. Through product ranking, the core and cavity size can be determined, and then the specifications of the mold frame can be determined.
Product ranking is mainly based on customer requirements, one or more products are arranged according to reasonable injection molding process and mold structure.
In particular, the mold structure, glue entry point, product size, parting surface, etc. of the product must be considered when ranking the precision injection mold.
For the ranking design of precision injection mold, the number of cavities should be as small as possible, because the precision of products decreases by 4% for each additional cavity, so the number of cavities of precision injection mold is generally not more than 4, there are 10 design principles for the placement of injection molds.
1: Each cavity is filled at the same temperature at the same time, and equilibrium layout or non-equilibrium layout is adopted to achieve equilibrium by adjusting gate size. 2: Gate balance. 3: symmetrical arrangement of large and small products.
4: The mold force is balanced, that is, the injection pressure center coincides with the center of the main channel to prevent the flash.
5: the flow channel is as short as possible to reduce the waste rate, molding cycle and heat loss. 6: compact structure, saving steel.
7: the same product, Big near small far 8: height similar. 9: First big and then small, see every opportunity. 10: good craftsmanship. Product ranking chart NJPE-
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