Melt gear pump for extrusion system is referred to as melt pump, also known as melt metering pump or extrusion pump, which can be used in various extrusion industries, such as sheet, plate, pipe, film, pelletizing, wire drawing, cable, Co-extrusion, compounding, precision extrusion and other industries.

 

The main materials that can be conveyed by the melt gear pump are:
Thermoplastic materials and their blends
PET PBT PTT
PA6 PA66 PA12
PE LDPE LLDPE HDPE HMWPE
PP EVA PB
PB PS HIPS ABS SAN
PC PEK PMMA POM
TPU PLA PBS


Rubber and elastomer materials
NR BR CR NBR
IR IIR
SBR HNBR
EPM EPDM
PU TPU
ACM CSM
ECO SI

 

The main function of the melt pump:
1. Significantly improve the stability of die pressure and improve product quality;
2. It can realize the nearly linear output of the flow, which is easy to control;
3. Increase the extrusion volume and increase the output;
4. Reduce the load of the extruder, save energy and reduce costs.

 

The main features of our company’s melt gear pump:
1. Very small pressure and flow pulsation, can achieve linear output of flow, suitable for precision extrusion system;
2. Use different structures and material configurations for different working conditions to better meet the individual needs of users;
3. It can be applied to the working conditions of high temperature (350℃), high pressure (40MPa) and high viscosity (40,000Pa•s);
4. Precise structure, high precision and long life.

 

The main structure of melt gear pump:
Rotor type: helical or spur gear
Heating method: electric heating/heat medium heating

 

Sealing structure:
■ Dynamic melt seal + packing seal
■ Mechanical seal
■ Dynamic seal with cooling melt

 

The application of extrusion pump in single screw extrusion system

 

The application of extrusion pump in twin screw extrusion system

 

The application of extrusion pump in rubber extrusion processing

 

 

Material configuration of the main structure of the melt gear pump

Material group

case

gear

bush

End plate

Features and applicable working conditions

Remarks

A

Standard

Nitrided steel

Nitrided steel

Tool steel

alloy steel

Good wear resistance, high toughness, high cost performance

Suitable for most working conditions with low abrasion

Spare parts support

H

High wear resistance

Nitrided steel

High speed steel

/coating

High speed steel

/ceramics

alloy steel

High strength, high wear resistance

Suitable for abrasive wear conditions

Need to be customized

SS

Corrosion resistant type

stainless steel

Nitrided steel

Tool steel

stainless steel

Wear-resistant and corrosion-resistant

Suitable for low corrosive conditions

Need to be customized

HS

High corrosion resistance

stainless steel

Stainless tool steel

Stainless tool steel

stainless steel

High corrosion resistance

Suitable for highly corrosive working conditions

Need to be customized

T

Special type

Special alloy

Special materials

Special materials

Special materials

High temperature resistance or high corrosion resistance

Suitable for working conditions with special requirements

Need to be customized

 

The installation structure of melt gear pump:
It is recommended to use a universal coupling to connect the reducer and the melt pump to eliminate the effects of thermal deformation; the melt gear pump is a positive displacement forced delivery pump, and the pump output flow can be adjusted by adjusting the pump speed. Frequency conversion is recommended. The speed mode can realize the nearly linear flow output of the gear pump.

 

We provide a complete set of solutions for melt pumps, driving devices, control systems and supporting screen changers and die heads