The core value of melt pumps in plastic extrusion

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

1. Elimination of melt pressure fluctuations

The extruder itself may cause fluctuations in the outlet pressure due to factors such as screw rotation speed, uneven feeding, and so on, affecting the dimensional stability of the product. The melt pump provides constant output pressure through the precision meshing of gears to ensure uniform extrusion flow and reduce thickness deviation or surface defects.

2. Enhance productivity and output Melt

pumps can be independently pressurized, allowing the extruder to operate at lower pressures while achieving higher extrusion speeds through pump pressurization, increasing overall production capacity by 20%-40%, especially for high-viscosity or high-volume materials (e.g., PE, PP).

3. improve material mixing uniformity melt

pump shear effect can further homogenization of the melt, to solve the uneven dispersion of masterbatch, multi-layer co-extrusion interface delamination and other issues, to enhance the mechanical properties of the products and the consistency of appearance.

4. Reduce energy consumption and production costs Ext

ruder does not need to undertake high-pressure extrusion tasks, the main motor load is reduced, energy consumption is reduced by 10% -30%. At the same time, the stable process reduces the scrap rate and saves the cost of raw materials.

5. Extend the life of the extruder

Extruder screws and barrels in low pressure conditions to slow down the wear, maintenance cycle is extended, especially for processing filler materials (such as glass fiber reinforced plastics) and other high wear scenarios.

6. Adaptation to complex process requirements Co-extrusion/multi-layer

extrusion: Precise control of melt flow in each layer ensures a stable thickness ratio between layers.

Material switching: shorten the transition time of material changing and reduce the waste of cleaning material.

High-precision products: Suitable for medical catheters, optical films and other products with stringent requirements on dimensional tolerances.

By stabilizing pressure, optimizing shear and independent booster function, the polymer melt pump systematically solves the fluctuation, inefficiency, high energy consumption and other pain points in extrusion production, and significantly improves product quality, production capacity and process flexibility, which is especially suitable for high-end plastic products and continuous mass production scenarios.

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