Luckily, there are ways to fix casting defects. When it comes to porosity defects, impregnation is one of the best solutions.
Impregnation is a secondary operation that resolves microporosity in castings. Impregnation seals the casting by filling small pores with resin. This makes the part leak-free and pressure-tight.
This operation can convert rejected parts into conforming castings, therefore recovering material, machine time, and labor invested into your project.
While you can impregnate a variety of materials, at Batesville Products, we use impregnation as a last resort for rejected aluminum castings.
Vacuum impregnation is often referred to as a wet process because involves resting a part in a tank of resin and mercury. Then, the parts are heat cured.
Vacuum pressure impregnation is often referred to as a dry process. The parts are injected with resin and pressurized.
The impregnation process is often repeated. A part may be impregnated 1-3 times before the porosity is resolved. When a part is put through the impregnation process multiple times, it is often called double or triple impregnation.
As you might have guessed, the best way to fix casting defects is by preventing defects from occurring in the first place. Batesville Products has been perfecting the casting process for over 75 years to manufacture high-quality aluminum castings every time.
Reach out to our team to learn more about permanent mold casting.