Melt pumps and single-plate screen changers are used in PE foam extrusion lines

The melt pump and single-plate screen changer play pivotal roles in PE foam extrusion production lines. Below is a detailed explanation of the application of these two devices in PE foam extrusion production lines:

Application of Melt Pump in PE Foam Extrusion Production Lines

Precise Metering and Stable Transportation:

The melt pump can continuously and stably deliver a precise flow of melt to the extruder head, ensuring that the dimensional tolerance of the extruded products is controlled within a narrow range. When strict dimensional tolerance requirements for extruded products or high raw material costs are involved, the use of a melt pump becomes particularly crucial.

Enhanced Production Efficiency and Energy Savings:

In the compounding and extrusion granulation production line combining a co-rotating twin-screw extruder and a melt pump, the melt pump can undertake the pressure-building function, thereby improving the mixing quality and output of the production line. The application of the melt pump can also simplify the production process of extruded products, shorten the production cycle, and achieve energy-saving effects.

Multi-Machine Co-Extrusion and Production of Large Products:

In the extrusion production line, multiple extruders can simultaneously feed a single melt pump, enabling the convergence, pressurization, and metering of molten material before supplying it to the extruder head for product extrusion. This configuration is particularly suitable for producing large products, such as large-diameter pipes, wide plates, and wide films.

Application of Single-Plate Screen Changer in PE Foam Extrusion Production Lines

Filtering Impurities and Enhancing Quality:

As a critical piece of equipment in the production process of plasticized materials, the single-plate screen changer can effectively filter out foreign particles and impurities, ensuring an improvement in product quality. By filtering impurities in raw materials, the single-plate screen changer can significantly enhance product quality, making it more marketable.

Improving Plasticization and Avoiding Product Defects:

With the installation of a single-plate screen changer, the back pressure at the extruder head increases, thereby improving the plasticization and homogenization of raw materials. This results in a more uniform texture and better finish of the product, while avoiding defects such as "entanglement marks" in the product.

Optimizing Material Rheological Behavior and Enhancing Product Strength:

The "damping" effect of the perforated plate and filter mesh of the single-plate screen changer ensures a more consistent melt cross-sectional flow velocity. This avoids the occurrence of "polymer orientation" and laminar flow phenomena, improves the longitudinal strength of the product, reduces the transverse strength, and further enhances the overall quality of the product.

Increasing Product Qualification Rate:

The installation of a single-plate screen changer facilitates the removal of moisture and volatiles from raw materials, thereby increasing the qualification rate of products.

In summary, the melt pump and single-plate screen changer exhibit significant application advantages and value in PE foam extrusion production lines. Together, they ensure the stable and efficient operation of the production line, improve product quality and qualification rates, reduce production costs, and provide strong support for the production of PE foam products.