Booster Extrusion Melt Gear Pump

A complete melt pump includes motor, reducer, coupling and pump head. The pump is mainly composed of housing and covers, gear shafts (drive shaft and short shaft), sliding bearings (bushing), shaft seals (viscoseal or packing seal), etc. The sliding bearing are with a lubricating groove. In the extrusion process, they are lubricated by the polymer.

The volumetric pumping device has two externally toothed gear wheels that mate with each other when they rotate. A small pressure in the pump inlet is sufficient to fill the tooth chambers. On the discharge side, the mating of the gear teeth in each other forces the melt out of the tooth chambers. The forces on each of the gear shafts are taken up by two slide bearings. These are lubricated by the plastic and are maintenance-free.

Operating conditions

1.Inlet pressure :5-120Bar

2.At diff. pressure:≤250Bar

3.Working temperature:<300ºC

4.Viscosity at shear rate 10s-1:300-20,000Pas

Applications

1.Underwater pelletizing

2.Compounding

3.Sheet/Film

4.Profile/Pipe

Technical data