Abstract
The runner balance of upper cover and back cover of mobile telephone was optimized in view of the runner imbalance of different mould multi-cavity in the design of plastic injection mold by means of Moldflow software. The results that the fill time of the back cover of mobile telephone is 0.8858s, that of the upper cover of mobile telephone is 0.8588s, the imbalance rate is 3.1%. The optimized runner size is φ3.739mma and φ1.666mm while the runner size is φ3mm before optimization. The gate location of V/P switch point is 29.85Mpa and is close to the target pressure 30Mpa, the pressure in the distribution is uniform.
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