Abstract: A component, for moulding glassware, is produced by forming a first mould, for moulding a first metal, placing an insert or inserts of a second, reinforcing metal within the first mould, casting the first metal in the first mould about the insert or inserts, and machining the casting to the desired final shape. The first metal may be cast iron, and the second metal may be a nickel cobalt alloy. The first moulds are designed so that the flow path of the first molten metal does not impinge directly on the second metal whereby the insert is prevented from being prematurely melted.

Abstract: A rig for pool brazing an end member such as an end ring or plate to one end of each of a plurality of bars during the production of a cage rotor for an electric machine comprises a chuck for gripping one end of a shaft of the rotor and support means for retaining the other end thereof whereby it can be retained in a substantially vertical position and means for driving the chuck to rotate the rotor. A substantially horizontal and circular framework is arranged around the chuck and defines a gap whereat a rig operator can stand to feed in brazing fluid between the end member and the end of each bar in turn. To heat evenly the ends of the bars and the end member as the rotor is rotated, a plurality of gas burner means are mounted on and spaced around the horizontal framework.