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The melt pump in XPS foam sheet extrusion industry

The melt pump in XPS foam sheet extrusion industry:
 
A, XPS foam sheet size :( width mm * Thickness mm) 60 * 2 60 * 2.5 60 * 3 60 * 3.5 60 * 5 60 * 10
 
The melt pump in XPS foam sheet extrusion industry
 
The main production equipment: two-stage extruder (Φ135 and Φ150 screw)

Φ135 supporting equipment: screen changer temperature zone 8, respectively 172 ° C 156 ° C 160 ° C 160 ° C 144 ° C 218 ° C 240 ° C
Φ150 supporting equipment: melt pump, mixing, switches, mold temperature machine, sheet metal molds.
Temperature zone is seven, respectively: 202 ° C 162 ° C 158 ° C 146 ° C 110 ° C 66 ° C 75 ° C
Φ135 Screw Parameters: Motor Power 75KW, frequency 105, speed 30.4 r / min
Φ150 Screw Parameters: Motor Power 55KW, frequency 79, speed 39 rev / min
 
The melt pump parameters:
Model MP-M-315CC inverter motor power 18.5KW PID 
 
Control system:
 
Gear pump for extrusion inlet pressure: 15MPa
outlet pressure: 25MPa
inlet temperature: 93 ° C 
Gear pump for extrusion temperature 125 ° C
outlet temperature: 116 ° C.
Speed: 12rpm 
current 27A
the kneading temperature of 125 ° C
mold temperature of 150 ° C die 
temperature: 70 ° C
foaming parameters: flon into the pressure 25MPa.
 
Conclusion: XPS foam production line was added after the melt pump advantages:
 
1. Reduce the proportion.
2. The temperature inside and outside the XPS sheet pressure drop, uniform temperature, can solve the problem of bending sheet.
3. You can increase the pressure in the mold required.
4. Can sectional dimension accuracy of the temperature XPS sheet.


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