The Principle Of Using The Screw_Screw,Barrel,Spare Parts–Kunshan SGT Equipment Industry Co.,Ltd

The Principle Of Using The Screw

Author：SGT Source：SGT Date： 2019-11-13

Summary：

the material and the screw should match. Especially for corrosive materials and hard materials, such as PVC, flame retardant materials, glass fiber added materials should use professional screws, avoid ordinary screws.

1, the material and the screw should match. Especially for corrosive materials and hard materials, such as PVC, flame retardant materials, glass fiber added materials should use professional screws, avoid ordinary screws.

2. If the corrosive material of ordinary machine must pay attention to the first time, use a stable material such as HDPE, HIPS, etc. to replace it.

3. If the ordinary machine occasionally uses the glass fiber material, be sure to use high material temperature, low screw speed and low back pressure. Remember to remember.

4. When the injection molding machine starts, it must be fully preheated by injection molding. After the barrel reaches the preset temperature, the temperature is kept below Φ60mm for 15 minutes. After the above 30 minutes, the motor is started again to start the screw-related action.

5, no matter what kind of material, try not to use the lower temperature limit production, such as PC material can also produce 250 degrees, ABS can also be done at 185 degrees, but the screw is not good, because the need for large torque, and wear and tear. At the same time, if the lower limit is used, the low screw speed is used.

6. Each time the machine is stopped for more than half an hour, it is best to close the material feeding port and clean the material of the barrel to set the heat preservation.

7. Avoid foreign matter falling into the material cylinder and damage the screw and barrel. Prevent metal fragments and debris from falling into the hopper. If the material is processed, a magnetic hopper is added to prevent iron chips from entering the barrel.

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

9, to avoid the phenomenon of screw idling, slipping and so on.

10. When using new plastic, the remaining material of the barrel should be cleaned. When using POM, PVC, PA+GF and other materials, try to reduce the degradation of raw materials. After shutdown, rinse with ABS and other nozzle materials.

11. Avoid mixing POM and PVC into the barrel at the same time, and react at the melting temperature to cause serious industrial accidents.

12. When the temperature of the molten plastic is normal, but it is found that the molten plastic has black spots or discoloration, it should be checked whether the rubber screw anti-reverse ring seat (over the apron, meson) is damaged.

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