Lost foam casting process produce near the near net shape casting parts with lost patterns made from expandable polystyrene, EPS. The EPS positive patterns are mounted to a casting system. After dressing, the pattern clusters are inserted into pouring vessels, which are then filled with unbound quartz sand. During casting, the patterns remain in the compacted sand mould.
For the production of castings with complex structure, RMC has the lost foam series casting system as well as several foam and gluing machines. The lost foaming process is considered to be the most suitable casting process for the large scale metal parts with complex structure, with weights of 0.2 kg to around 500 kg or more.
During lost foam casting process, the sand is not bonded and a foam pattern is used to form the shape of the desired metal parts. The foam pattern is "invested" into the sand at the Fill & Compact process station allowing the sand into all voids and supporting the foam patterns external form. The sand is introduced into the flask containing the casting cluster and compacted to ensure all voids and sapes are supported.
Foam Pattern Making
Foam Pattern Coating
RMC provides a comprehensive line of lost foam equipment, including flask pouring, flask handling and flask compaction. Our line of foam bead processing equipment is recognized world wide as one of the leading ones.