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
