PLC-controlled pre-expander SPJY1600G

automaticfor EPS

EPS Pre-expander Machine, accurate density with multiple safety features [ Accurate EPS Pre-expander Machine, the special device for EPS expansion, is controlled by PLC and touch screen. It is fully automatic with accurate density control and fast cycle time. The purpose of pre-expansion is to produce EPS raw material to the desired density. During pre-expansion, the EPS foam are fed to a vessel containing an agitator and controlled by steam and air supplies, this vessel is called EPS Pre-expander machine, or EPS Batch Pre-expander. The EPS foam density is controlled by temperature and pressure. The diameter of the particles increases while the density of the resin decreases. After exiting from the EPS batch pre-expander machine, the expanded beads will flow through a dryer to remove moisture, and then go to aging silo. - 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. - 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.