JPS6411045A - Production of chain for accessories and chain - Google Patents

Abstract

PURPOSE:To obtain a broad chain by one time of brazing by arraying plural pieces of chains the cut ends of the rings of which are directed to a cross direction in a cross direction and brazing said cut ends to close the cut ends and to connect the chains cross. CONSTITUTION:A metal wire rod 6a is discharged by as much as the specified length from the tip of a nozzle 1 and the discharged root part is but by a cutter 4. The front end of the wire rod 6a is held by a clamper 2. Bending tools 5a, 5b are positioned to face both ends of the wire rod 6a and moved upward. Then, the wire rod 6a is thereby bent to an annular shape and a ring 7a is formed which is then connected to a ring 7b. Since the moving quantity of the bonding tool 5a is make large, the tool 5a moves round largely and the cut end 8a of the ring positions alongside the ring 7a. Plural pieces of such chains are arrayed cross and powder solder consisting of the same material as the material of the metal forming the chains is sprinkled over the cut ends 8a and the cross connecting joints. The chains are then heated to melt the powder solder by which the cut ends 8a are closed and the respective chains are connected in the cross direction as well. The broad chain is thereby obtd.