The unit is shaken so that the plaster penetrates into every small cuting and designs made inthe pattern. In plaster mold casting the pattern is place is a flask and plaster is poured over the pattern. Before covering the pattern with the mold it is coated with some substance which will prevent the plaster from sticking to the pattern. However, rubber pattern are used for complex geometrical designs.

Process: For the plaster mold casting metal pattern are used because wood patterns are difficult to be drawn from the mold.

But it is assumed that in future some complex, cost-effective casting technique is evolved in which plaster mold process is used. Of now no process has been able to replace the expensive investment casting method in the steel casting industry. For which many casting process are being combined to manufacture complex designs that require cope and drag mold. The metal casting industry in on the look for more technical and economically viable casting process. This expendable mold process plaster is used only for castin g non-ferrous metal for a wide of shapes and sizes, Plaster mold casting, also called rubber plaster molding (RPM), is a relatively economical process and therefore the foundry industry is working on to use plaster mold casting with investment casting. Introduction: Plaster mold casting is a casting process where instead of sand, plaster of Paris is used as the molding aggregate.

Plaster of paris molds