Process	Investment casting
	Investment casting produces parts with very good surface quality, narrow tolerances, high accuracy and complex geometry without slip angles and parting lines. The use of molds made from refractory material allows metals with high melting points to be casted. The process is also called lost-vax casting (in French: Cire perdu) Patterns made from vax are attached to a strue to form a pattern tree and then coated with a thin layer of refractory material. The wax is then melted away. The mold is heated to a high temperature which burns away contaminant and permits easier flow of the molted metal. After casting the mold is broken away leaving the casted metal part. A mold therefore only produce one part.
Danish Name	Præcisionsstøbning
Category	Mass conserving processes, Metal casting
Materials	Steel
Typical products	Turbine blade Dental parts Jewelry
Competing processes	Powder injection moulding
Price notes	Rather costly.
Keywords	Precision Surface quality High tolerances Accuracy
Photo	Thomas Nissen (Computer graphics)
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