Robust Machine Build: The stainless steel dryer bed in the machine is corrosion-resistant and has a large surface area for effective drying. The screw conveyer is designed with a variable speed drive, allowing for adjustable material flow rates between 1 - 10 m³/h. The sieving device has a mesh size of 0.5 - 2 mm to filter out any impurities or oversized beads.

Steam System Sophistication: The pressure reducer and PID control system of the batch pre-expander machine can maintain steam pressure stability within ±0.03 bar. This level of precision ensures uniform expansion of the EPS polystyrene beads. The steam consumption rate is optimized, saving up to 35% compared to traditional machines.

Pressure Regulation Prowess: The pressure sensor in the polystyrene batch expander machine has a fast response time of less than 0.5 seconds. The multi-steam exhausting system it is paired with can adjust the pressure in the expansion chamber within seconds, maintaining a stable pressure environment. This is crucial for producing high-quality expanded beads with consistent density.

Temperature Management Excellence: The temperature sensor has a resolution of 0.1°C, allowing for extremely accurate temperature control. The compressed air proportional valve can adjust the cooling air flow rate precisely, maintaining the expansion temperature within a tight range. This results in less than 5% broken bead rate during high-density expansion.

Material Level Monitoring and Control: The weighing scales have a high precision of ±0.01 kg, and the vibrated level sensor is highly sensitive. Together, they ensure that the material level is maintained accurately, minimizing density variations to less than ±0.015 kg/m³.

Intelligent Material Filling: The touch screen interface provides a user-friendly platform for setting the filling weight. The electronic weighing filling system operates with a repeatability of ±0.05 kg, ensuring accurate and consistent filling every time.

Dependable Electric Control: The PLC touch screen and branded electronic parts and valves ensure seamless automation. The machine can be programmed to run continuous or batch operations, adapting to different production schedules.

The auto density-weighing system, when selected, offers real-time density monitoring and adjustment, enhancing the quality control of the expanded beads.

The secondary expansion device for SPJ130 and SPJ160 extends the machine's capabilities, allowing for the production of beads with even more complex density profiles.