Nov 2, 2020 · While die castings have a good surface finish and are dimensionally accurate, porosity inside the part is inevitable. This blog will define die casting porosity, problems porosity causes, and how vacuum impregnation seals die casting porosity.

Jul 3, 2024 · Aluminum die casting porosity is sealed through vacuum impregnation in four (4) consecutive steps – Removal of air and filling of voids after placing the casting in the impregnation chamber. Recovery of the excess sealant in a moving station to recollect and reuse them in …

Porosity sealing is done through the process of vacuum impregnation. Vacuum impregnation is a preferred OEM process that seals porosity and leak paths in metal castings, sintered metal parts and electrical castings that form during the casting or molding process.

Mar 9, 2025 · Discover die casting porosity, its causes, and solutions like vacuum impregnation and pressure die casting to enhance the quality and reliability of your cast parts. ... For critical applications, we offer vacuum impregnation or positive air pressure techniques to seal pores and enhance durability, even post-machining processes. Why settle for ...

Oct 7, 2019 · Casting impregnation is a post-casting process which seals porosity and leak paths in castings that would render components that need to be pressure or fluid-tight unusable. For the most effective quality enhancement results, the impregnation process can be integrated within the production facility or even inline with the manufacturing process.

Sep 11, 2018 · Inspecting die castings requires quantitative, measurable values that define what is and isn’t acceptable given a part’s intended use. The fact is even materials cast with careful processes will allow some leakage, given enough time. Casting manufacturers develop and adhere to leak rate standards.

Jan 1, 2019 · Most castings can be sealed in under a minute. Pressure cycling can be used to achieve penetration of the sealant into very fine porosity. The benefits of pressure impregnation are: • Speed. Castings can be impregnated in <1 minute and pressure tested after 30 minutes. • …

Jan 2, 2019 · In metal castings, porosity is typically considered any void found in the casting. Some metal casting porosity can affect the part’s structural integrity, creating a failure point. More commonly, porosity prevents the part from being pressure tight.

With decades of expertise in die casting machinery, we deliver cutting-edge solutions that drive industrial performance and innovation. Advanced Machinery Comprehensive Servicing

Jul 19, 2021 · Vacuum impregnation is the most effective way to seal casting porosity, but it must be performed at the correct stage of the production process. Performing vacuum impregnation prior to finishing will ensure that all leak paths are sealed, while safeguarding and enhancing the quality of the finish.