Plastic materials:(1) liquid flowing ability of plastic(2) the temperature of the plastic material does not match(3) the rate of plastic and glass recycling is not evenlyInjection molding parameters:(1) the inappropriate injection pressure (2) the pressure to keep fit (3) spray time inconsistent should increase spray time (4) the time keep pressure inconsistent should increase the time keep pressure (5) injection speed too slow should increase the injection speed (6) cooling time inconsistent should increase cooling time (7) the spray volume inconsistent should the spray volume fades until reaching the required
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