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
DE series melt gear pump is a universal melt gear pump for extrusion systems. Suitable for the extrusion and conveying of polymer melts from low viscosity to very high viscosity; generally installed between the extruder outlet and the die head as a melt metering pump; it can also be installed in the polymer melt pipeline , Used as a booster pump; this series of pump housings have built-in flow channels, which can be used for cooling or heating medium.
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 application of extrusion pump in single screw extrusion system
The application of extrusion pump in twin screw extrusion system
We provide a complete set of solutions for melt pumps, driving devices, control systems and supporting screen changers and die heads
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 the 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 DE series 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
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 |
1. Optimized melt flow channel design: eliminate dead corners in the flow channel, reduce polymer residues to a minimum, and improve the quality of products;
2. Optional built-in flow channel: suitable for fluid cooling to adapt to a more accurate and fast temperature control system; it can also be used for heat medium heating;
3. Improved gear parameter design: more precise rotation displacement design makes the output pressure more stable and adapts to precise extrusion conditions;
4. A wide range of applicable viscosity: different sealing methods can be applied to working conditions from low viscosity to very high viscosity;
5. A variety of installation methods: to meet the individual needs of users;
6. High-precision manufacturing and excellent heat treatment: more precise and more durable;
Technical data:
Viscosity ： 1E-3～40000Pa•s（1～40,000,000cP）
Suction side pressure ： 0～30MPa
Discharge side pressure ： 0～40MPa
Differential pressure ： 25MPa
Temperature ： ≤350℃
Heating ： Electric heating/heating medium channel
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.
Pump size and Technical data
|
Model |
cc/r |
Inlet |
Outlet |
Max. flow rate m3/h |
Temp |
|||
|
Low |
Medium |
High |
Ultra high |
|||||
|
＜50Pa.s |
50～200Pa.s |
200～2000Pa.s |
＞2000Pa.s |
|||||
| DE-5 |
5 |
0～30 |
≤40.0 |
0.041 |
0.028 |
0.019 |
0.012 |
≤350℃ |
| DE-10 |
10 |
0.081 |
0.054 |
0.038 |
0.024 |
|||
| DE-20 |
20 |
0.162 |
0.108 |
0.076 |
0.049 |
|||
| DE-32 |
32 |
0.259 |
0.173 |
0.121 |
0.078 |
|||
| DE-50 |
50 |
0.405 |
0.270 |
0.189 |
0.122 |
|||
| DE-75 |
75 |
0.527 |
0.365 |
0.243 |
0.162 |
|||
| DE-100 |
100 |
0.702 |
0.486 |
0.324 |
0.216 |
|||
| DE-160 |
160 |
1.123 |
0.778 |
0.518 |
0.346 |
|||
| DE-200 |
200 |
1.404 |
0.972 |
0.648 |
0.432 |
|||
| DE-250 |
250 |
1.620 |
1.080 |
0.675 |
0.473 |
|||
| DE-355 |
355 |
2.3 |
1.5 |
0.9 |
0.7 |
|||
| DE-500 |
500 |
3.2 |
2.2 |
1.2 |
0.9 |
|||
| DE-750 |
750 |
4.9 |
3.2 |
1.8 |
1.4 |
|||
| DE-1000 |
1000 |
5.4 |
3.8 |
2.2 |
1.9 |
|||
| DE-1200 |
1200 |
6.5 |
4.5 |
2.6 |
2.3 |
|||
| DE-1600 |
1600 |
8.6 |
6.0 |
3.5 |
3.0 |
|||
| DE-2000 |
2000 |
10.8 |
7.6 |
4.3 |
3.8 |
|||
| DE-2500 |
2500 |
10.8 |
8.1 |
4.7 |
4.1 |
|||
| DE-3150 |
3150 |
13.6 |
10.2 |
6.0 |
5.1 |
|||
| DE-4000 |
4000 |
13.0 |
10.8 |
7.6 |
6.5 |
|||
| DE-6300 |
6300 |
20.4 |
17.0 |
10.2 |
9.2 |
|||
| DE-8000 |
8000 |
21.6 |
17.3 |
13.0 |
11.7 |
|||
| Please consult with the manufacturers for the bigger or lower specification | ||||||||
The flow rate of the melt gear pump is related to the working speed, material viscosity, and working pressure. Please consult the manufacturer for specific selection.
The selection needs to provide parameters: 1 flow or output 2 material name 3 material viscosity 4 material corrosivity/toxicity 5 inlet and outlet pressure (pressure difference) 6 operating temperature
In addition, according to the actual situation and requirements of the customer, you can choose the pump casing configuration without flow channel
