Abstract: In a fixed type discharge electrode system employed for forming a ball on a bonding wire, a magnet is provided on, for instance, the discharge electrode so as to apply a magnetic field that causes the portion of an electric spark facing the bonding wire to be bent and positioned beneath the bonding wire.
Abstract: An injection molding machine is provided with two sets of metal molds each including a stationary and movable metal molds. The two sets are mounted on a supporting plate which is moved in a direction perpendicular to the axis of an injection cylinder. Thus by reciprocating the supporting plate the two sets of the metal molds are alternately moved into and out of the injection molding machine.