Lost Foam Casting Note: Lost Foam Casting (also known as full mold casting) is to combine paraffin wax or foam models similar to the size and shape of the casting into a model cluster, brushed with refractory coating and dried, then buried in dry quartz sand and vibrated Modeling, pouring under negative pressure to vaporize the model, liquid metal occupies the position of the model, solidification and cooling to form a new casting method.