How to fix -Increase the flow temperature or the temperature of the mold together with injection speed. -Increase spray volume (the volume is too small, no-spray buffer zone). -Install the fit between the pressure of the spray and spray, spray pressure increases. -Improves exhaust valve system, reduce the clamping force of the mold. -Increase the size of system (runner). -If low mold temperature, then increase the temperature of the mold
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