Expanded Polystyrene foam is manufactured from the by-products, or left overs, from the oil refining process. FPM is a “Block Molder” of EPS which means we mold EPS into large blocks 36” x 48” x 120” in size.
eps shape molding machine factory
Once again, steam is used to deliver heat to the process. A precisely measured quantity of beads is blown into a steel mold. Steam is then injected into the pre-expanded beads to heat the mix to 212 degrees F. This heat causes the wall of each bead to soften and the remaining pentane within each bead expands. This expansion causes the beads to increase in size within the steel mold. This expansion increases the pressure and the beads are forced together to form a single block. The soft bead walls actually allow the beads to melt together into a single solid block. At this point the mold opens like a clam shell and the block of EPS foam is removed.