Vacuum permanent mould casting

This is another method of permanent mould casting. It is similar to low pressure casting, in which vacuum is utilized in place of pressure. Thin walls can be achieved as in low pressure mould casting. Along with it yields are better as no risers are utilized. As vacuum is utilized in its place, the purity of metal is kept. The mechanical properties are 10-15% better than permanent mould casting. The size of castings ranges from 4.5kg-200kg.

It is a permanent mould casting powdery mould releasing agent. As per this discovery has a granulated or powdery mixture of a lubricant, an organic polymer and a metal soap, in which the lubricant is coated with polymer or metal soap. Due to this the mould releasing agent permits production of high quality in a permanent mould casting.

In a spray system for spraying and applying a powdery mould casting agent on to both inside surfaces of a moveable metal mold and fix metal mould for a permanent mould casting tool. A spray method of permanent mould casting agent of which a spray head is given to electrostatic spray gun is fitted to a feeding port so as to shut it tightly under a stage where a moveable and stationery metal mould are closed