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A. Body of EPS Pre-expander Machine
• Expansion chamber is made of SUS 304 stainless steel, cylindrical shape inside & square shape outside, with insulation layer.
• Agitator is made of SUS 304 stainless steel, speed is adjustable by frequency converter during different steaming stage.
• Discharge door located on the side of the vessel, to empty the chamber fast.
• Safety fence to top & around stairs.
B. Screw Loading system
A screw loading machine with a tank (approx. 1.5 m3 volume, 1200kg EPS beads) is using to load EPS resin to Dosing unit. And then filling to the expansion chamber by gravity.
C. Fluid bed dryer
On top of Fluidized bed, there is waste steam collection cover, inside floor parts made of SUS 304 stainless steel, The dryer is equipped with a steam-air heat exchanger inside, which avoid the beads from thermal shock. At the end of dryer, there is a rotary system to send EPS beads to specified silos.
D. 2nd Expansion Unit
2nd expansion system is available for this EPS pre-expander to get lower density. The PLC control the 2nd expansion in a fixed volume. The filling from the silo to the machine is done by a vacuum fan.
E. Steam PID System
The steam flow is controlled by PID system. Ensure pre-expansion chamber pressure steady and low density tolerance
F. Control Panel
Main cabinet, with security lock, is equipped with Delta/Siemens touch screen and PLC.
All parameters and recipes can be added, revised and saved in PLC.
G. Density weighting & print Unit
After each cycle, the electronic weighting system will suck a fixed volume material from the dryer and weighed. The density data can be saved in PLC or printed on a paper.
