ABSTRACT
Die and plunger lubricants position a cushion at the interface between the superheated casting alloy and the surface of the die steels. The insulating film is sprayed upon the die surface and prevents contact between it and liquid metal. The film must be strong enough to withstand turbulent metal flow. The lubricants used in die casting are often referred to as release agents; die lube is another term frequently used. High-pressure die castings would be impossible to remove from the permanent steel dies after solidification without the film of lubricant during ejection.
