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Problems with Investment Casting

This procedure usually used in the jewelry manufacturing industry is where a plaster investment design is hit with a vacuum to cure the investment.  In this process the by product of the curing under vacuum procedure is water coming from the curing plaster of Paris.  Cold traps are recommended as is regular inspection of the condition of the vacuum pump oil due to contamination of the oil from the water in the plaster.

Usually the same pumps are used to degas the molten metal poured into the investment.  Degassing in this particular operation is relatively clean and we would simply recommend a particulate trap for this operation to stop any metal "flakes" from getting in the pump inlet.

11/27/2005 ęCopyright HyVac Products, Inc. All Right Reserved
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