Extruder Melt Pump System | Plastic Spinning Melt Gear Pump
The extruder melt pump system with plastic spinning melt gear pump is an indispensable precision auxiliary unit for polymer filament extrusion production lines. Installed between the single-screw extruder and spinneret die, this positive displacement gear pump solves the pressure pulsation and flow instability generated by extruder screw rotation, delivering stable and accurately metered plastic melt for continuous filament drawing.
The melt gear pump mainly consists of pump body, precision meshing gears, high-temperature bearings and heating channels. Driven by a variable frequency motor, the rotating gears capture molten polymer in tooth cavities, transport melt to the outlet and build stable spinning pressure. Its volumetric metering principle ensures melt output is proportional to gear speed, largely independent of inlet pressure fluctuation. For PP, PET, PA plastic spinning processes, it maintains consistent melt flow and uniform temperature, directly reducing filament breakage, uneven thickness and surface defects.
Integrating the melt gear pump into the extrusion system separates melt conveying and pressure building tasks from the extruder screw. The extruder only needs to complete plasticizing and feeding, lowering screw load and extending service life. Operators can adjust pump speed independently to fine-tune throughput without changing extruder parameters. High-temperature alloy materials are adopted for core components to withstand long-term working temperature up to 350°C and high extrusion pressure, adapting to high-viscosity polymer melt conditions.
Manufacturers of plastic fiber, monofilament and synthetic yarn widely upgrade their extrusion lines with this melt pump system. It improves finished filament consistency, raises production yield and cuts raw material waste. Compared with traditional extrusion without metering pumps, production stability is greatly enhanced. When matching with screen changers, the whole melt supply system delivers cleaner, more homogeneous melt, supporting high-speed long-run plastic spinning. For extrusion plant managers, the melt gear pump is a cost-effective upgrade to stabilize spinning quality and boost line profitability.
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