Abstract: An injection valve for a vacuum wax injection installation for selectively communicating a mold into which wax is to be injected with a chamber with a vacuum and a chamber with liquid wax in the vacuum wax injection installation includes a main valve body and a tubular member which is arranged slidably in the main valve body between a valve-closed position, an evacuation position and a wax injection position. One end of the tubular member carries a connecting element against which the mold can be pressed while the opposite end of the tubular member is closed. The tubular member has lateral openings providing a communication between the connecting element and first the vacuum chamber and then the wax-filled chamber as the tubular member is progressively pushed into the main valve body from the valve-closed position, whereby firstly the mold is evacuated and then wax is injected into the mold.

Abstract: The invention relates to a device (1) for melting and injecting wax for the manufacture of wax parts in broken-mould casting. The device (1) comprises a wax boiler (2) having a wax-injection nozzle. The boiler being provided with a heating device (3) for melting the wax and keeping it molten. The wax boiler (2) is pressure-sealed with a removable lid (5) and has a pressure inlet connected to a pressure source (33). Furthermore, a deaeration valve (13) is provided on the lid. The wax boiler (2) is connected via a wax-replenishing channel (15) to a wax-premelting container and wax reservoir (14) containing a heating device (16). A shut-off valve (17) is provided in the wax-replenishing channel (15).