Sand cores are produced by blowing a sand-air mixture into a mold. The foundry engineer’s objective is to achieve a homogeneous sand distribution with a sufficient packing of the sand in order to avoid air enclosures in the sand and achieve a good stability of the core. FLOW-3D Cast‘s modeling capabilities allow the user to obtain the optimum nozzle configuration by varying the number and position of the nozzles through which the sand is blown in and also the number and position of venting nozzles through which the air escapes.
The core drying model computes the transient drying of moisture remaining in the sand after it has been blown into a core die. Typically, drying is done by blowing hot air through the core while still in the die. Simulating the heating, moisture evaporation and even temporary condensation of moisture in colder parts of the core makes it possible to optimize the drying process. This ensures complete drying while minimizing the energy costs associated with the heating and blowing of the air.