Melt Pump

The melt pump is designed to handle high-temperature, viscous polymer melts: to convey the melt, generate the required pressure, and meter it accurately. In a laboratory setup, the pump is installed between the extruder and the forming tool, such as a die or die head.

An extruder may generate pulsations because of uneven material feed, fluctuations in temperature, or changes in screw speed. The melt pump acts as a buffer, smoothing these fluctuations and providing a stable melt flow. This is critical in experiments that require repeatability and high-quality samples such as films, filaments, and profiles.

Improves metering accuracy. Because the operating principle is based on positive displacement, each gear tooth moves a fixed volume of material, while the rotational speed directly determines the throughput. This allows the amount of polymer supplied to be set very accurately.

Reduces the load on the screw. The pump performs part of the pressure-generating function. As a result, the extruder screw can operate at lower pressure and temperature. This reduces the risk of leakage, lowers energy consumption, and extends equipment service life.

Expands process capabilities. The pump makes it easier to combine different materials, including polymers, composites, and additives, study their processing behaviour, and test new formulations.

Key Specifications