How it’s made – EPS insulation sheet made by EPS block molding machine
We call it EPS blocks or EPS insulation foam or EPS thermal blocks, but its real name is expanded polystyrene blocks. These feather-light white foams have a wide range of applications in building and construction.
Expanded polystyrene plastic comes in the form of tiny beans about one millimeter in size. The first step is to expand them in a steam chamber through an EPS pre-expander. The heat at 135 degrees Celsius causes the pentane gas in the beans to escape and allows air to enter. The beans are inflated to 40 times their original size.
The factory then uses fans to transfer the expanded EPS beans through the automatic EPS silo system to the EPS silo for ripening.
To produce expanded polystyrene products we use EPS block forming machines. There are two types of EPS block forming machines
Horizontal EPS block forming machine
Vertical EPS block forming machine
It features EPS blocks of varying densities.
They use steam to cross-heat EPS beans to melt them together. Regular EPS blocks are molded into 6000X1200X1000MM, and the cycle speed of the EPS block molding machine is about 4-10 minutes.
Scales built into the conveyor weigh the blocks to ensure they meet specifications, which can weigh anywhere from 35kg to 250kg for a block of this size depending on its density.
The finished EPS blocks will be put into storage and matured for 10-30 days before being cut.