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Precautions for using filter screen prompted by extruder screen factory

  • Categories:NEWS
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  • Time of issue:2021-11-11 21:56
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(Summary description)Precautions for using filter screen prompted by extruder screen factory.As the steel wire filter screen is easy to rust, avoid moisture during storage, otherwise rust will appear in the extrudate. More seriously, the rusty extruder screen is easy to break and leak the filtered impurities. Therefore, the filter screen should be stored in plastic bags or antirust paper.

Precautions for using filter screen prompted by extruder screen factory

(Summary description)Precautions for using filter screen prompted by extruder screen factory.As the steel wire filter screen is easy to rust, avoid moisture during storage, otherwise rust will appear in the extrudate. More seriously, the rusty extruder screen is easy to break and leak the filtered impurities. Therefore, the filter screen should be stored in plastic bags or antirust paper.

  • Categories:NEWS
  • Author:
  • Origin:
  • Time of issue:2021-11-11 21:56
  • Views:
Information

Precautions for using filter screen prompted by extruder screen factory.As the steel wire filter screen is easy to rust, avoid moisture during storage, otherwise rust will appear in the extrudate. More seriously, the rusty extruder screen is easy to break and leak the filtered impurities. Therefore, the filter screen should be stored in plastic bags or antirust paper.

When PVC material is being extruded, do not place the exposed extruder screen on the head of the extruder. This is because the hydrochloric acid in the air near the die will corrode it. The best practice when extruding PVC is to install a fume hood above the die head, and make sure that the spare extruder screen is placed away from here, or even put it in the freezer after it is bagged. When purging and cleaning the protective plate, it is easy to roll back, so that the sealing surface is damaged and the sliding surface does not match, resulting in leakage. In this way, it will not only cause time-consuming cleaning work, but also the leaked molten material may affect the thermocouple value, damage the heater, and sometimes even cause fire.

For the single exhaust and two-stage extruder, if the back pressure at the extruder screen becomes larger, the output of the second stage will be reduced, but the output of the first stage will not be affected. When the back pressure increases to about 2500 lb / in2 (1lb = 0.4536kg, 1in = 25.4mm), the molten material from the first stage begins to leak slowly into the exhaust hole. In order to avoid such phenomena, the extruder screen must be replaced when the pressure is low. In addition, the gear pump behind the filtering device can also inhibit the leakage of molten materials into the exhaust hole.

If the extruder screen filters a large amount of sundries, it will fail completely and make the pressure of the extruder reach the peak quickly. Therefore, there must be safety systems such as safety diaphragm, safety pin or alarm connected with pressure gauge to prevent this from happening.

The above are prompted by professional extruder screen factory

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