Xingye explains the cause of bubble problem in injection mold

Author: MULAN -Plastic Molding Manufacturer

The plasticizing capacity of the injection molding machine should be appropriate. If the plasticizing capacity is too small, it will not mix completely and become brittle. If it is too large, it will degrade. The following editor of Xingye Plastic Mold Factory loves to introduce the analysis of the causes of bubbles in injection molds. The gas in the bubble (vacuum bubble) is very thin and belongs to the vacuum bubble.

Generally speaking, if bubbles are found when opening the mold, it is a gas interference problem. Formation of vacuum bubbles due to insufficient filling of plastic or low pressure. Under the effect of rapid cooling of the mold, the fuel pull at the corner of the cavity leads to volume loss.

Solutions: (1) Increase injection: pressure, speed, time and material volume, increase back pressure, and enrich mold filling. (2) Increase material temperature and flow smoothly. Reduce material temperature, reduce shrinkage, and increase mold temperature appropriately, especially the local mold temperature where vacuum bubbles are formed.

(3) Set the gate at the thicker part of the part, change the flow state of the nozzle, runner and gate, and reduce pressure consumption. (4) Improve the exhaust condition of the mold. For more information about injection molds, please visit the official website of Xingye: http://www.dgxingyesj.com/.