Hot Melt Adhesive Extruder Melt Pump

The hot melt adhesive extruder melt pump is a precision positive-displacement metering device specially designed for hot melt adhesive extrusion production lines. Mounted at the outlet of the extruder, it works together with the plasticizing unit to deliver stable, constant-volume melt flow for hot melt adhesive production, solving common issues like pressure fluctuation, uneven output and inconsistent coating weight caused by direct extrusion from the extruder screw.

Constructed with high-temperature alloy gears, heat-resistant pump body and independent heating control channels, this melt gear pump can continuously handle high-viscosity hot melt materials such as EVA, PO, polyamide and PUR hot melt adhesives. Its volumetric metering principle ensures melt delivery volume strictly corresponds to gear rotation speed. Even when raw material feeding or extruder pressure fluctuates, the pump maintains steady outlet pressure and uniform melt supply. This feature is critical for hot melt adhesive manufacturing, as minor flow variations will lead to inconsistent adhesive thickness, poor product bonding performance and high scrap rates.

With the melt pump integrated into the hot melt adhesive extrusion system, the extruder only focuses on melting and plasticizing raw materials. Pressure building and precise metering are undertaken by the gear pump, which reduces the load on the extruder screw and barrel, extending equipment service life. Operators can adjust pump speed separately to change production throughput without modifying extruder settings. Sealing structures are optimized to prevent melt leakage under high temperature and medium pressure, suitable for continuous long-hour running.

This hot melt adhesive extruder melt pump is widely applied in production of hot melt adhesive particles, web coating, adhesive film and hot melt stick lines. It improves product uniformity, lowers defective rate and reduces raw material consumption. Combined with hydraulic screen changers, the whole melt system filters impurities and provides cleaner homogeneous melt. For hot melt adhesive manufacturers, adopting this melt pump is a reliable way to stabilize production quality, raise line efficiency and gain better competitiveness in the hot melt material market.

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