Sat Mar 21, 2:00 PM - Fri Mar 31, 12:00 AM
3841 US Highway 301 S, Riverview, FL 33578

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One of the top causes of injection molded parts is bubbles. This troublesome part defect results in appearance problems. This guide will analyse the causes of bubbles in injection moded parts and presents the solutions.

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The gas in a bubble (vacuum bubble) is very thin and belongs to a vacuum bubble. Generally speaking, if bubbles are found at the moment of mold opening, it is a gas interference problem. The formation of vacuum bubble is due to insufficient filling plastic or low pressure. Under the rapid cooling effect of the plastic injection mold, the fuel at the corner of the die cavity is pulled, resulting in volume loss.

1. Increase injection energy: Pressure, speed, time and material quantity, and increase back pressure to make the mold full.
2. Increase the material temperature and flow smoothly. Reduce the material temperature, reduce the shrinkage, and increase the mold temperature properly, especially the local mold temperature of the vacuum bubble forming part.
3.Set the gate in the thick part of the workpiece, improve the flow condition of nozzle, runner and gate, and reduce the consumption of pressure.
4. Improve the injection mold exhaust condition.
Check some mold parts designs:

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