The core value of melt pumps (also known as gear pumps) in plastic extrusion production lines is manifested in the following aspects:

Elimination of Melt Pressure Fluctuations

Extruders may experience pressure fluctuations at their outlets due to factors such as screw rotational speed and uneven feeding, affecting product dimensional stability. Melt pumps, through precise gear meshing, provide constant output pressure, ensuring uniform extrusion flow and reducing thickness deviations or surface defects.

Enhancement of Production Efficiency and Yield

Melt pumps can independently pressurize, allowing extruders to operate at lower pressures while achieving higher extrusion speeds through pump pressurization. Overall production capacity increases by 20%-40%, particularly suitable for high-viscosity or high-yield materials (such as PE, PP).

Improvement of Material Mixing Uniformity

The shearing action of melt pumps can further homogenize the melt, solving issues such as uneven color masterbatch dispersion and delamination in multi-layer co-extrusion interfaces, thereby enhancing product mechanical properties and appearance consistency.

Reduction of Energy Consumption and Production Costs

Extruders are relieved of high-pressure extrusion tasks, reducing main motor load and energy consumption by 10%-30%. Meanwhile, stable processes reduce reject rates, saving raw material costs.

Extension of Extruder Lifespan

Wear on extruder screws and barrels is reduced under low-pressure conditions, extending maintenance cycles, especially in high-wear scenarios such as processing filled materials (e.g., glass fiber-reinforced plastics).

Adaptation to Complex Process Requirements

Co-extrusion/Multi-layer Extrusion: Precise control of melt flow rates for each layer ensures stable interlayer thickness ratios.

Material Switching: Shortens transition times during material changes and reduces cleaning material waste.

High-Precision Products: Suitable for products with stringent dimensional tolerance requirements, such as medical catheters and optical films.

Melt pumps systematically address challenges in extrusion production, such as fluctuations, inefficiencies, and high energy consumption, through stable pressure, optimized shearing, and independent pressurization functions. They significantly enhance product quality, production capacity, and process flexibility, particularly in high-end plastic products and continuous large-scale production scenarios.

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