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Daily maintenance of barrel screw of injection molding machine

Update:20 Dec 2019
Summary:

Injection machine barrel maintenance and inspection con […]

Injection machine barrel maintenance and inspection content: clean the barrel and inspect the injury

Precautions and inspection methods:
A. After the barrel warms up, remove the nozzle and barrel head coupling body and remove the screw. Brush the inner wall of the barrel with a copper mesh brush moistened with a release agent, and then tie a cloth bar to a long wooden bar to clean the bore of the barrel. Use the light method to check the inner wall for cleanness and damage.
B. In addition to checking whether the inner wall of the barrel is clean and scratched, it should also be checked for wear. The method is to lower the barrel to room temperature, and use a barrel measuring instrument to perform multi-point measurement from the front end of the barrel to the periphery of the hopper mouth, and the distance can be taken as 3 to 5 times the inner diameter. When the wear is serious, consider the barrel heavy bore and increase the screw size accordingly.

Injection machine screw maintenance and inspection content: check ring and seal ring are damaged
Precautions and inspection methods:
A. The condensed material on the screw cannot be peeled off, otherwise the thread surface will be easily damaged. Worn surface wear condition:
B. Screws can only be beaten with wooden hammers or copper rods, and screw grooves and check rings can only be cleaned with copper wire brushes. Surface quality of screw groove (if it is chrome plating, it should be checked for peeling):
C. The solvent used for cleaning the screw should adopt the necessary protective measures and avoid contact between the solvent and the skin;
D. Before installing the screw head, the red part or molybdenum disulfide coated on the thread part should not be too much, otherwise, the product will be stained during production.