Sealant Testing: What Can a Sealant Slug Tell You?

Posted by Andy Marin on Tue, Mar 13, 2018 @ 11:22 AM

Vacuum impregnation is a process that seals porosity in metal castings. If left untreated, then the porosity creates a path for fluids and gasses to leak from the part. When performed properly, vacuum impregnation seals the porosity, but it is undetectable on the surface or in the machined features of the casting.

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How to Solve Casting Cleanliness with Vacuum Vapor Degreasing

Posted by Andy Marin on Mon, Mar 05, 2018 @ 08:59 AM

In order to properly seal casting porosity, parts must be clean and dry. The porosity must be free of any contaminants that might preclude the sealant from penetrating.  If any residual contaminants are present, then the following problems may occur.

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Case Study: Aluminum Casting Porosity Forces the Need for Vacuum Impregnation

Posted by Andy Marin on Thu, Feb 01, 2018 @ 11:26 AM

One of the largest aluminum casting facilities in United States produces engine blocks and transmission cases for an automotive OEM. This facility supplies the vast majority of powertrain castings in support of the OEM’s assembly operation throughout North America.

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What's the Difference in Gas and Shrinkage Porosity?

Posted by Andy Marin on Fri, Jan 12, 2018 @ 08:57 AM

The definition of porosity is any void or hole in a casting. But this definition does not describe or give direction on the root cause of porosity. Casting porosity can be caused by gas formation or solidification shrinkage while the metal is a liquid.  If a casting needs to be pressure tight, then the porosity can allow gas and fluids to seep from the part.  In addition, the porosity can weaken the casting. In this blog, we will discuss the difference between gas and shrink porosity, and the best solution to seal porosity.

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Case Study: Quality Conditions Demand Impregnation Equipment

Posted by Andy Marin on Thu, Dec 14, 2017 @ 03:40 PM

Schabmüller Automobiltechnik is a leading engineering, machining, and sub-assembly supplier to major automotive OEMs and Tier 1 suppliers.  Founded in 1978, the company’s headquarters is in Großmehring Germany, and employs 850 people in four locations. 

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Eliminating the 7 Wastes with Lean Manufacturing

Posted by Andy Marin on Mon, Dec 11, 2017 @ 02:22 PM

The most effective way to improve profits is to reduce costs. This means to remove waste from the process. Not only does waste affect profits, but it also affects delivery, quality and customer satisfaction. The 7 wastes in lean manufacturing are what Godfrey & Wing's vacuum impregnation equipment eliminates from the casting production process.

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Case Study: Eliminating Shrink Porosity in Lost Foam Castings

Posted by Andy Marin on Thu, Dec 07, 2017 @ 10:03 AM

Manufacturing castings with the lost foam process enables the foundry to produce castings with many benefits and features not available in other casting processes. This casting process is advantageous for very complex castings that would regularly require cores.  It is also dimensionally accurate, maintains an excellent surface finish, requires no draft, and has not parting lines so no flash is formed.


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Why Use Recoverable Sealants?

Posted by Andy Marin on Tue, Nov 28, 2017 @ 10:50 AM

When it comes to choosing a vacuum impregnation sealant, there are two options: recoverable or recyclable. This blog defines these  options, and explains some of the benefits of choosing Godfrey & Wing sealants.

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5 Reasons Why Companies Bring Vacuum Impregnation Equipment In House

Posted by Andy Marin on Thu, Nov 16, 2017 @ 12:03 PM

Recent decades have seen an increase in the use of lightweight, high-performance aluminum castings in car manufacturing. Aluminum helps reduce the car's weight, increase gas mileage, and improve acceleration, braking and handling.


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Case Study: Vacuum Impregnation Enables Continuous Production

Posted by Andy Marin on Wed, Nov 15, 2017 @ 10:03 AM

The Albert Handtmann Metallgusswerk GmbH is the largest lightweight (aluminum) foundry in Germany. The family-owned company has continually endeavored to improve its casting and machining processes to benefit its customers worldwide.

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