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How to Choose a Screen Changer for PET, PA, and PVC Plastic Film Extrusion?

When selecting a screen changer for PET, PA, and PVC plastic film extrusion, multiple factors need to be considered to ensure it meets specific production requirements and process conditions. Here are some key selection points: Material Characteristics Melting Point and Melt Flow Index (MFI): PET, PA, PVC, and other plastic materials have different melting points and MFI, which affect the choice of screen changers. Materials with higher melting points require screen changers that can withstand h

Dual-Plate Dual-Station Screen Changer: Structural Principle, Application Fields, and Prominent Featu

I. Structure and Principle of Dual-Plate Dual-Station Screen Changer The dual-plate dual-station screen changer primarily consists of two filter plates, the main body of the screen changer, a hydraulic system, a control system, and other components. Its working principle is as follows: 1. Working State: During normal operation, the plastic melt enters the screen changer from the extruder and is diverted into two parallel flow channels. It is then filtered through the mesh screens on the two filt

Comprehensive Analysis of Hydraulic Screen Changers: Applications, Structure, Advantages, and Operati

Hydraulic screen changers are widely used in plastic extrusion, rubber processing, and ceramic manufacturing to filter impurities and ensure product quality. Featuring a dual-channel and dual-station design with a rigid sealing structure, they are suitable for high-temperature and high-pressure environments, enhancing productivity. 1.Plastic Extrusion Hydraulic screen changers play a crucial role in the plastic extrusion process. They filter out impurities in the plastic melt, ensuring the quali

Under what circumstances should the filter mesh be replaced in a PP modified dual-column screen chang

Production Cycle and Filter Mesh Lifespan: Generally, the replacement cycle for the filter mesh is between 3 to 6 months, but the specific cycle needs to be adjusted according to the actual situation on the production site. If the raw materials are prone to contamination or the production process has strict requirements, the filter mesh replacement cycle should be shortened. Filter Mesh Clogging: Clogging of the filter mesh can lead to an increase in melt pressure and a decrease in flow rate, af

What are the precautions when changing (or looping) the mesh in a new backflush hydraulic screen chan

When changing the mesh (i.e., looping) in a new backflush hydraulic screen changer, the following precautions need to be taken to ensure the safety and effectiveness of the operation: I. Preparations Before Operation Check Equipment Status: Ensure that the backflush hydraulic screen changer is in good working condition, with no damage or abnormalities to any parts. Select Appropriate Mesh: The installed mesh must be of the right size, neither too large nor too small, to ensure effective filtrati

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