Cleaning the injection screw barrel-Zhoushan Intai Screw Manufacture Co.,Ltd.

Cleaning the injection screw barrel

Posted by Admin | 21 Jan

Cleaning an injection molding screw barrel can take a full day's work, even with two or more operators. This can be done by removing parts or injecting cleaning compounds. It is not always necessary to remove the screw and barrel from the machine, but it may be more cost effective than using a cleaning agent.

When using a cleaning agent, the first step you want to take is to shut off the flow of resin being processed by pushing the sliding door at the bottom of the resin hopper closed. A second operator should observe the head pressure gauge to ensure the system is not over-pressurized and monitor the screw to ensure it is always spinning at 15-20 rpm.

If the die is left on the extruder, continue the cleaning process until you notice a complete change in the extrudate from processing resin to cleaning resin. Once the mold is completely purged, the rotation of the screw can be stopped completely.

When cleaning the barrel, stearic acid can be applied to the holes of the plasticizing barrel, and then pushed into the holes with a round wire brush covered with copper gauze. Rotate this brush with a power drill until it can easily move in and out of the barrel hole.

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