Nanjing Gorray Extrusion Equipment LLC.

China Manufacturer with main products: Single Screw Extruder, Twin Screw Extruder, Sheet Extruder, Tube Extruder, Recycling Extruder, Film Extruder, Compounding Extruder,...

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Dual Stage Extrusion Line

Supply Ability: 7,200 Kilogram per Day
Shipping: FOB
Payment Terms: L/C, T/T

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Export Markets: North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
Place of Origin: Jiangsu in China
Packaging Details: CONTAINER

Specifications

By either single screw extruder or twin screw extruder the process goes in this sequence: solid conveying, melting, compounding, degassing and extruding. Normally, each step requires different screw structure, different operating conditions, such as RPM, barrel heating temperature, material pressure, etc. But as a matter of fact, all these steps perform through the same screw shaft. That is, the rotary speed of screw is same and the temperatures will influence on each step. All these affect the pressure build-up and energy input which are so far not possible to be realized for every inpidual step.   
  For instance, in order to increase the output of single screw extruder, in conveying part, we would use the screw structure like this: deeper groove depth, longer screw distance, higher RPM, lower die pressure and lower extruding temperature. But higher RPM means faster conveying speed and this would make a negative effect on melting. Sometimes for better mixing, we would use kneading elements which can provide better compounding as well as higher temperature. If the material being processed is heat-sensitive, this kneading element may get it degraded. The same problem would happen on a twin screw extruder.   
  To avoid these problems we develop the idea of dual stage extrusion line.The first extruder is of GTS twin screw mainly for melting and compounding, and the second extruder is of SJ single screw mainly for pressure build-up and extruding.
Application
Heat-sensative or Shear-sensative Materials like PVC, XLPE
Specifications
Model
GTS Twin Screw
SJ Single Screw
L/D Ratio        
RPM,Motor Power (kw)
Capacity(kg/h)   
GTS30/SJ45
GTS30
SJ45
28-40/8-15
400,11 /90,5.5
10-70
GTS50/SJ120
GTS60
SJ120
28-40/8-15
400,37/80,22
100-300
GTS65/SJ150
GTS65
SJ150
28-40/8-15
400,55/80,45
150-450
GTS75/SJ180
GTS75
SJ180
28-40/8-15
400,110/80,75
300-800
GTS95/SJ200
GTS95
SJ200
28-40/8-15
400,220/80,90
500-1600
 

Service Process

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