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It is so simple to use and maintain the injection screw correctly

Update:11-01-2021
Summary:

The injection screw is working for a long time under hi […]

The injection screw is working for a long time under high temperature, high pressure, high mechanical torque and high friction environment, and loss is inevitable. Even if the screw has undergone various surface treatments, from quenching to nitriding, boronizing to spraying, to dual alloy spraying, it seems that the quality of the screw itself has improved a lot.

   Then how to use it in use and what are the precautions? Next, the editor organized the following points for everyone:

   1. Material and screw must match. Especially corrosive materials and hard materials, such as PVC, flame-retardant materials, and glass fiber-added materials should use professional screws instead of ordinary screws.

   2. When the injection molding machine is started, the injection molding must be fully preheated. After the barrel reaches the preset temperature, keep the temperature for the temperature below Φ60mm for another 15 minutes. After the above 30 minutes, start the motor and start the screw related actions.

  3. If the machine is shut down for more than half an hour each time, the blanking port should be closed, the barrel should be cleaned, and heat preservation should be set.

   4. Avoid foreign matter falling into the barrel and damage the screw and barrel. Prevent metal fragments and debris from falling into the hopper. If processing recycled materials, a magnetic hopper should be added to prevent iron filings from entering the hopper.

   5. When using anti-salvation, make sure that the plastic in the barrel is completely melted to avoid damage to the transmission system parts when the screw is retracted.

  6. ​​Avoid idling and slipping of the screw.

   Then how to maintain it correctly:

   1. Do not start the machine when the barrel screw has not reached the preset temperature.

  2. Prevent metal fragments and debris from falling into the hopper. If processing recycled materials, a magnetic hopper should be added to prevent iron filings from entering the hopper.

  3. When using anti-salvation, make sure that the plastic in the barrel is completely melted, so as not to damage the transmission system parts when the screw retreats.

  4. When using new plastic, clean the remaining material of the barrel.

   5. When the temperature of the molten plastic is normal but black spots or discoloration of the injection molded product are constantly found, check whether the screw head, rubber ring, and rubber meson are worn.

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