Abstract: A knuckle bracket includes a bracket main body that has an inner peripheral shape along a tube of a shock absorber and a pair of attachment parts that are formed to protrude parallel to each other. The apparatus for manufacturing the knuckle bracket includes a width molding machine that molds a width of the pair of attachment parts in a state where the workpiece is supported on a support shaft, and a hole punching machine that machines attachment holes into the pair of attachment parts in a state where the workpiece is supported on the support shaft. The workpiece is transported from the width molding machine to the hole punching machine by moving the workpiece along the support shaft until the workpiece is above the die after the support shaft is raised and then lowering the support shaft until the support shaft abuts a top surface of the die.

Abstract: A knuckle bracket includes a bracket main body that has an inner peripheral shape along a tube of a shock absorber and a pair of attachment parts that are formed to protrude parallel to each other. The apparatus for manufacturing the knuckle bracket includes a width molding machine that molds a width of the pair of attachment parts in a state where the workpiece is supported on a support shaft, and a hole punching machine that machines attachment holes into the pair of attachment parts in a state where the workpiece is supported on the support shaft. The workpiece is transported from the width molding machine to the hole punching machine by moving the workpiece along the support shaft until the workpiece is above the die after the support shaft is raised and then lowering the support shaft until the support shaft abuts a top surface of the die.

Abstract: A mixing blade is formed into a spiral shape by disposing blade plates, which are twisted in a predetermined manner in a circumferential direction of the blade, adjacent to each other in the circumferential direction along an inner wall surface of a mixer drum. Each of the blade plates includes a rib extended in the circumferential direction of the blade.

Abstract: In a closing machine (1) for closing an open end of a work piece (9) by pressing a die (4) heated by a high frequency heating device (2) against the work piece (9) rotating about an axial center, the die (4) comprises a die main body (601) which contacts the work piece (9) and a holder (611) which surrounds the die main body (601). The die main body (601) is formed from cemented carbide whereas the holder (611) is formed from a steel material. The holder (611) is subjected to induction heating by the high-frequency heating device (2), whereas the die main body (601) is heated by heat transfer from the holder (611).

Abstract: A contact tip for arc welding includes a feed surface constructed of conductive material which has a negative thermoelectromotive force with respect to pure platinum at temperatures above 0.degree. C. When welding current flows from the contact tip to a welding wire, an endothermic reaction occurs at the feed surface to lower the temperature of the feed surface and to improve the thermal durability of the contact tip.