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Correcting Three Vacuum Impregnation Myths

Posted by Andy Marin on Mon, Nov 25, 2019 @ 09:43 AM

In some die casting applications, components must also be pressure-tight to hold pressurized fluid or gases. Companies use vacuum impregnation to meet these requirements by sealing the internal leak paths caused by interconnected porosity.


Misconceptions and lack of information about the vacuum impregnation process can hinder its implementation, which may increase unforeseen costs and negatively impact part quality. This piece demystifies vacuum impregnation by correcting three common myths.

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Video: When Should I Impregnate a Casting

Posted by Andy Marin on Thu, Jun 20, 2019 @ 08:50 AM

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 die casting cases, those specifications require that the part must hold pressurized fluid or gasses. Companies use vacuum impregnation when the part must hold fluids or gasses under pressure. A common question asked about vacuum impregnation is “When Should I Impregnate a Casting?” This video addresses this question by answering if vacuum impregnation should be done before or after machining and finishing. 

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Vacuum Impregnation Economics

Posted by Paul Young on Mon, Feb 18, 2013 @ 02:14 PM

The primary purpose of vacuum impregnation is to seal porous castings and prevent leakage. If the impregnation process is not efficient and fails to seal the casting it will become scrap, and the number and value of these failures will determine the economic viability of the process.

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Old vs New Vacuum Impregnation

Posted by Wade Fisher on Mon, Sep 17, 2012 @ 12:35 PM

The other morning I was walking the dog around 5:00 AM, and I noticed how exceptionally crisp and brilliant the stars were in the pre dawn sky, shining though the high pressure system overhead. While finishing the walk around the neighborhood, I thought about mankind’s worldview that the earth was flat as recent as 600 years ago and the reluctance of decision makers of that time, influenced by the rhetoric of naysayers, to accept anything other than the status quo.

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Preventative Maintenance in Casting Impregnation

Posted by Nick Chapman on Wed, May 23, 2012 @ 11:19 AM

In the casting impregnation industry preventative maintenance is a necessity. Due to the nature of the impregnation process and the wet environment, corrosion and equipment failure can occur at a rapid rate if proper maintenance does not take place.

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