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Vacuum Impregnation

What is Vacuum Impregnation? 

Vacuum impregnation seals porosity and leak paths that form during the casting or molding process. Vacuum impregnation stops casting porosity and allows manufacturers to use parts that would otherwise be scrapped. Vacuum impregnation is the preferred method to seal porosity in order to prevent fluids or gases from leaking under pressure.


What Causes Porosity?
The metal casting process is very sophisticated, but it still has inherent imperfections. When liquefied and injected into a mold, metal creates gas bubbles that get trapped inside the molded form as the metal solidifies. Gas bubbles create air pockets, folds and inclusions. Depending on their size and their random placement within the casting, this porosity can cause metal parts to leak when placed under pressure. 


Do More With Less

Industries are increasingly requiring manufacturers to “do more with less”. Vacuum impregnation helps make this possible.


In the automotive industry, engineers are specifying lighter metals and thinner walls in critical components like engine blocks. These same OEMs, meanwhile, have higher performance requirements and lower acceptable leak rates in their castings. These specifications and tighter requirements result in more parts being rejected and scrapped due to casting porosity. This increases costs, robs capacity and delays production.


With Godfrey & Wing's vacuum impregnation, manufacturers can meet OEM requirements and ensure the quality of their components and the integrity of their bottom line.

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