Impregnation
PHB offers complete impregnation capabilities in house for those customers and applications requiring this value added service.
Porosity (shrinkage or gas) can occur naturally in the manufacture of aluminum and zinc die castings. Factors regarding part geometry, tool design and the manufacturing process are all important considerations in reducing porosity.
Depending upon the part application, porosity may cause product failures based upon the component's inability to retain gas or fluids under pressure.
Impregnation is a fast and effective process for reducing the inherent problems associated with porosity sometimes found in die castings.
Using a vacuum chamber, a resin is drawn through the casting filling the voids created by shrinkage and/or gas porosity. The resin cures to solid filling the void and eliminates the leak path.
Properly processed castings are clean and will have no change in appearance or dimensions. Castings can be impregnated as cast or finish machined.