The VPI (Vacuum Pressure Impregnation) autoclave is used to impregnate both stators and rotors with resin. These elements are essential in electric motors, generators and transformers, and their impregnation significantly improves their performance and durability, as well as their heat resistance, electrical insulation and mechanical properties.
The impregnation process starts with the introduction of the rotor or stator into the autoclave. First, it undergoes a vacuum process that removes air and gases trapped in the pores of the part. The resin is then introduced and the vacuum is maintained to allow it to penetrate the pores. The next step involves applying pressure to evenly distribute the resin throughout the component and allow it to penetrate into the component.
At the end of the cycle, the resin is returned to the storage tank under vacuum. As an alternative to the storage tank, the resin can be placed in baths inside the autoclave directly.
Each installation is designed and adapted to the customer’s impregnation components and the resin to be used. Compact solutions are offered from 500 mm diameter up to large installations of 6,000 mm diameter.