Current position:HOME   PRODUCTS  |  TWIN SCREW EXTRUDER
 

Twin Screw Extruder
Machines with exceptional capabilities – thanks to our special design

1. A three-start screw as core equipment.
2. Coaxial transmission: Ambient and equipment temperature changes, installation irregularities, vibrations and other
external factors will not impair the operation of the coaxial power transmission unit – a benefit of our machine's unique chassis
technology.
3. Meshing clearance: a uniform screw engagement clearance reflecting high-precision component machining is the basic
guarantor of superior plasticizing performance in your application.

 
Ø
53 Twin Screw Exrtuder with three-start screw
 
Ø
58 Twin Screw Extruder with two-start screw
 
 
ΔP
indicates the pressure increase
 
Feeding port
 
Vent outlet
2400mm
 
 
Dispersion effect of an 48:3 pigment powder(30%)in PP(70%)

4. Wear resistance: our scientific approach in selecting screw shaft and barrel materials, backed by advanced heat treatment
technology, ensures an exceptional wear resistance so that the machine's uniform screw engagement clearance will be preserved.
5. Interchangeability: by replacing the barrel and screw shaft, our three-start twin screw extruder can be converted into a
two-start twin screw unit.
6. Special structure
7. Water cooling of the screw shaft, starting from the internal core shaft, is available as an option. The customer can choose
the solution which meets his requirements.
8. Selectable multi-feed and multi-point venting options.
9. Standardization: a standardized screw shaft and core-barrel design is employed across our triple screw extruder,twin
screw extruder and blend reactor lines.

Advantages over a conventional two-start screw design
 
10. Materials undergo shear three times per screw revolution.
11. The triple groove conveyor provides smoother conveying action; output is guaranteed.
12. A thicker core shaft can deliver and support higher torque levels.
13. An increased screw surface area, making for an enlarged area of contact between the screw and processed material, provides a more uniform and more thorough shearing action.
14. Multiple but smaller shear and dispersion volumes during operation can reduce wear of the screw thread.
15. At the feeding port, materials are being delivered via two screw elements plus 6 additional threaded screw feeding grooves – equivalent to a 1/3 increase in material mixing effectiveness. Moreover, our shallow groove structure provides an earlier onset of shear and hence, plasticizing action, plus smoother degassing.
16. Inside the barrel, as the material moves from a transfer section to the kneading zone and on to the next transfer section, a process of mixing three parts of material into one, followed by renewed separation into three parts, is continuously carried out for superior mixing performance.
17. In the venting zone, the amount of material in contact with the screw surface area increases – as materials become thinner, the degassing effect is greatly improved.
18. Dispersion performance: compared to a two-start screw, a more continuous, more powerful and more homogeneous shearing force is delivered, improving the mixing and dispersion of polymers. In masterbatch processing, pigments are dispersed more thoroughly and the much increased quantity of nanoscale particles is more uniformly dispersed for a better coloring effect. In polymer blending, a greatly enhanced intermixing performance is achieved (see figure).
19. Applications: plastification of thermoplastic polymers, micro blending of rubber and plastics, nanoscale powder dispersion in polymers, production of coating powders, food processing, chemical reactions, etc.
 

Twin Screw Extruder Technical Data: 
Model No.
KT-53
KT-67
KT-96
Screw Diameter (mm)
52.9
66.5
95.5
Screw L/D Ratio
30-60
30-60
30-60
Number of Threads
3
3
3
Screw Rotational Speed (rpm)
800
800
800
Main Motor Power (kW)
55-220
90-450
160-800
Electric Heating Power (kW)
27-48
28-52
50-95
Max. Output (kg/h)
450
720
1600

Screw Barrel Cooling  
Barrel Cooling Type
Softened Water
Softened Water
 
Softened Water Pump Motor Power (W)
370
750
1500
Exterior Cooling Water Demand (m³/h)
1.0
1.5
3

Vacuum Venting System(Optional)
Vacuum Pump Type
Water Loop Vacuum Pump
 
Max. Air Displacement (m³/min)
0.5
0.8
1.5
Ultimate Vacuum Pressure (MPa)
0.095
0.095
0.095
Motor Power (kW)
1.5
2.2
4
Water Consumption (m³/h) 
0.6
0.75
1.0

Melt Filter System(Optional) 
Screen Change Mode
Non-stop, Hydraulic Twin-pole
Hydraulic Station Motor Power (kW)
3
3
3

Feeding System(Optional)
Feeding Principle
Twin Screw
 
 
Drive Motor Power (kW)
0.75
2.2
3
Drive Motor Speed Control Mode
Frequency Conversion
 
 
Max. Feeding Capacity [PP] (kg/h)
500
800
2000
L x W x H [L/D 48] (mm)
5420 x 740 x 1400
6450 x 860 x 1600
8100 x 1000 x 1700


Barrel
Inner sleeve material can be chosen according to requirements or application and is replaceable when worn. Enable the barrel to have long lifespan.
Screw Elements
Alloy materials can be chosen according to the purpose of application.
Machine Chassis
To engineer a good chassis, is an important basis for an excellent Extruder.
 

 
Copyright © 2015 Keimei Plastifizierung Technik GmbH. All rights reserved.