Thermoplastic extrusion gear pumps are positive displacement devices whose operating principle is based on the change in volume during gear meshing. Specifically, a gear pump consists of two gears of the same size rotating in mesh with each other in a tightly fitted housing. When the gears rotate, the volume of the space on the disengaged side of the gears changes from small to large, forming a vacuum that sucks in the liquid; the volume of the space on the meshed side of the gears changes from large to small, squeezing the liquid into the pipeline. The suction chamber and discharge chamber are separated by the meshing line of the two gears. Due to the continuous meshing of the gears, the liquid is mechanically squeezed out continuously, and the pump discharges the same amount for each revolution.

Highly Accurate Metering Control:

Heiko Extrusion Gear Pumps have pumping efficiencies of 99.5% or better, ensuring precise volume output and assuming the pressure build-up function of the die. Extruder-related die pressure fluctuations are suppressed from 20:1 to 50:1 and specifications are controlled to a nominal +/-0.25%, improving product consistency and quality.

MP-M series melt gear pumps are designed with improved gear parameters, featuring a more accurate rotary displacement for a more stable output pressure, adapted to precision extrusion working conditions.

Wide range of operating conditions:

It is suitable for highly filled polymers, partial melts, recycled plastics, low-viscosity materials, and can operate at pressures up to 5000 psi (approximately 34.5 MPa).

Conveys a wide range of media viscosities, from 0.001 Pa-s to 40,000 Pa-s, and is capable of handling a wide range of thermoplastics from low to high viscosity.

Wide range of operating temperatures, typically up to 350°C.

Compact and Efficient Design:

It's compact, low-profile design, along with long-life hardened tool steel gears and bronze anti-tack adhesive seals, make it an alternative to most competing gear pumps.

The gear pump is driven by a separate motor that effectively blocks upstream pressure pulsations and flow fluctuations, which can be controlled to less than 1% at the gear pump outlet.

Thermoplastic extrusion gear pumps play a key role in thermoplastic extrusion processing, with core functions of stabilizing die head pressure, improving product quality and optimizing extrusion efficiency.