VERFAHREN ZUM UMGIESSEN VON METALLKOERPERN, INSBESONDERE WICKLUNGEN VON TRANSFORMATOREN

1. Process for casting around metal bodies, in particular coils of transformers, with soaking, -impregnating- or casting-resins in a closed casting mould (10) containing the metal bodies whereby preparation of the casting material is carried out in a vacuum in a supply vessel (1) and whereby the casting mould (10) is evacuated before being filled with casting material, characterized in that the casting material driven by a pump (12) is pressed into the casting mould (10) from the bottom through a releasable supply line (23) that is sealed in vacuum-tight manner, in that the casting mould (10) and métal bodies are washed by the casting material, and casting material emerging out of a riser on the casting mould (10) flows back into the supply vessel (1) through a return line (24) that is also sealed in vacuum-tight manner, in that the returning casting material in the vacuum of the supply vessel (1) is drawn out to form a thin film before falling back into the casting material supply (11), in that for each casting process a multiple of the filling amount of the casting material necessary for a casting flows through the casting mould (10), so that when the casting mould washing is concluded, the casting material film in the supply vessel (1) is bubble-free and in that the filled casting mould (10) is disconnected from the supply line (23) and the return line (24) while the casting material sets.