1. XPS foamed board extrusion line
A. Automatically feeding material system
B. Grade I extrusion system
C. Foam agent injecting system
D. Changing net system by liquid pressure
E. GradeII extrusion system
F. Extrusion die head and mould
G. Shaping system
H. Grade I haul-off system
I. Transporting and cooling system
G. GradeII haul-off system
K. Lengthways cutting system
L. Transverse cutting system
M. Electrical instrument control system

2. Technique Introduction
First, compounding symmetrically XPS material with other assistant materials like nucleate agent and color batch;
Secondly put them into hopper of Igrade extruder by vacuum feeder automatically;
Thirdly melting and plasticizing resin by specially designed screw symmetrically, at the same time injecting foam agent by high pressure and mixing it with melted resin;
Fourthly, putting them into IIgrade extrusion system to melt, mix, add pressure and cool again and extruding foam board by special mould for board, then cooling and forming board by cooling and forming device;

Fifthly, putting the board into Igrade haul-off system and transporting them into IIgrade haul-off system by transportation rolls;
Sixthly, cutting waste edge by saw of both-side and finishing transverse cutting according to set length; The last step, stacking and storage.