Continuous Preexpander is to expand EPS raw material to required density, machine works in continuous way both in taking raw material and discharging expanded material.
Continuous Preexpander can do second and third expansion to get low density.
Machine complete with Screw Conveyor, First and second expansion loader, Expander, Fluidized bed Drier.
1. All process including filling, expanding, sieving, de-lumping and conveying are done automatically;
2. With primary and secondary expansion device to get density of 8-30g/l;
3. First filling is controlled by frequency converter;
4. With power-off protection device;
5. With Japan steam pressure reducing valve.