Hopper: The machine has a hopper where the raw polystyrene beads are loaded. The hopper feeds the beads into the pre-expanding chamber.
Steam injection system: The pre-expander machine is equipped with a steam injection system that supplies steam into the pre-expanding chamber.
Agitation system: Inside the pre-expanding chamber, there is an agitation system that ensures uniform heating and expansion of the beads.
Exhaust system: The pre-expander machine has an exhaust system to remove the steam and any volatile gases released during the expansion process. This system helps maintain a controlled and safe environment within the machine