Ensures efficient processing and consistent polymer properties.
Applications
The FMPTM, Farrel Melt Pump is effective for processing multiple polymers.
Linear low-density polyethylene (LLDPE)
High-density polyethylene (HDPE)
Low-density polyethylene (LDPE)
Ethylene-vinyl acetate (EVA) / Polyethylene (PE) Copolymers
The FMPTM provides melt pressurization with minimal temperature increase and efficiency resulting from positive displacement, minimal backflow and limited energy dissipation. The FMPTM, Farrel Melt Pump is connected directly to the finishing reactor flange for a "hot melt" discharge or an FCMTM, Farrel Continuous Mixer for a granular or powder reactor discharge. The side discharge FMPTM maintains the rheological properties of the polymer, assuring consistency in physical characteristics.
FMPTM Key Features Include:
A custom-designed inlet flange of the polymer melt pump housing distributes the polymer melt over two intermeshing gears.
Tangential feed pockets force the polymer melt into the tooth cavities and the intermeshing, high precision gears carry the polymer melt along the periphery of the housing bores.
Where the gears intermesh, the polymer is squeezed from the gear tooth cavities. Because of close tolerances, high volumetric efficiency can be maintained over wide ranges of pressure and temperature.
Double helical gears offer pulse-free operation.
Gear shaft journals are supported by sleeve bearings lubricated by polymer melt and tapped from the high-pressure discharge. The polymer lubricant is collected on the opposite ends of the bearings and returned internally to the suction side of the FMPTM, Farrel Melt Pump.
For standard polymer finishing line applications, the FMPTM employs a single drive shaft connected to a variable speed motor and gearbox. With this arrangement, the driven gear shaft turns the idler gear in the pump housing.
For high-viscosity applications, both shafts are driven.
