| 摘要 |
<p>Injection valve for a vacuum wax injection moulding apparatus for connecting a mould to be injection-filled with wax to a vacuum chamber (14) or to a liquid wax chamber (12) in the vacuum wax injection moulding apparatus, with a closed position, an evacuation position and a wax-injection position and with a basic valve body (20) and a connection element (26) against which the mould can be pressed, the connection element being attached to a tube (24) whose end opposite the connection element is sealed, and which tube can be inserted into the basic valve body, the tube having at least one lateral opening (40, 52), via which, in dependence on the insertion depth, it first connects the vacuum chamber and then, with greater insertion depth, connects the wax chamber to the connection element. By means of this arrangement, the injection sequence (evacuate mould, disconnect vacuum and release wax) can be obtained with very low technical outlay and nevertheless with high ease of operation. <IMAGE></p> |
