The goal of a foundry is to produce high quality die castings that meet or exceed the customer's specifications at a competitive cost. In some cases, those specifications call out maximum defect size and/or require that the part must hold pressurized fluid or gases. Foundries use vacuum impregnation when the defect size is less than the maximum allowed amount, yet the part still is not capable of holding fluids or gases under pressure. Vacuum impregnation is a proven process that seals internal defects without impacting any other feature of the manufactured part.
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