The Multi Expansion Unit is engineered for producing EPS densities below 12 kg/m³ (0.75 lb/ft³), which are typically not attainable using standard pre-expansion machines. This unit allows for multiple expansion stages and includes the following components:
- Pre-loading Silo: Positioned above the expansion chamber, this silo features an integrated electronic scale system. It measures the precise quantity of material needed for multiple-stage expansion, ensuring consistent results.
- PLC System: The programmable logic controller (PLC) calculates the required amount of EPS bead material in kilograms (lbs) for the second expansion phase. It controls expansion within a fixed chamber volume for accuracy and repeatability.
- Vacuum Fan: A vacuum fan transfers the EPS bead material from the silo into the expansion chamber, maintaining a consistent and controlled flow for continuous operation.
This system is ideal for achieving lower density EPS while maintaining uniform quality throughout production.