Plastic pipe extrusion melt pump

In the extrusion production of plastic pipes, dimensional accuracy and production stability are key metrics. Traditional extruders struggle to meet high-end production requirements, and melt pumps—as precision conveying equipment between the extruder and the die—have become standard equipment on high-end production lines. It effectively eliminates pressure fluctuations in traditional extruders caused by feed rate variations and temperature changes. Through gear-meshing positive displacement conveying, it delivers a stable, metered feed to the die. At the same time, it transfers the function of building melt pressure, reducing the load on the extruder so it can focus on plasticization. Furthermore, by leveraging the linear relationship between rotational speed and conveying volume, it enables precise metering and automated control.

The advantages of thermoplastic melt pumps are significant: they can substantially improve product precision, controlling pipe wall thickness deviation to within ±1%—far superior to the ±5%–8% achieved by traditional processes—thereby saving raw materials and reducing scrap rates. They also increase output, lower energy consumption, and enable the extruder to operate efficiently at low pressure and low temperature, minimizing melt leakage and improving energy utilization efficiency. Furthermore, they are suitable for high-viscosity, heat-sensitive, and filler-containing materials, broadening the range of product specifications and varieties on the production line and enhancing a company’s competitiveness.

In summary, through their core functions of pressure stabilization, pressure boosting, and precise metering, Thermoplastic melt pumps bring benefits such as improved precision, increased output, and reduced energy consumption to plastic pipe extrusion. They are key equipment for improving quality, increasing efficiency, and upgrading production lines.

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