The process of producing foamed plastic parts using expandable polystyrene pellets is as follows:

 

 

The expandable polystyrene beads are heated to heat-vaporize the blowing agent, 

thereby expanding the volume of the beads to ensure that the molded product reaches 

a prescribed density and uniformity.

 

 

 

The pre-expanded beads need to be stored for a period of time, and the air is absorbed 

for aging to prevent shrinkage after molding. Usually done in large silos or open contain-

ers.

 

 

Commonly used molding methods are steam heating molding and extrusion.

(1) Steam heating molding method is divided into steaming cylinder foaming and hydraulic 

machine direct steaming foaming according to the heating method.

①Steam foaming method is suitable for producing small, thin-walled and complex shaped 

plastic parts

② The hydraulic press directly through the steam foaming method is suitable for producing 

foam sheets with a large thickness.

 

(2) Extrusion foam molding

Extrusion foam molding is suitable for the production of sheets and films.

 

 

You could see our website: www.epsole.com for more information, or contact us by info@epsole.com.