Patent ID: 8555687

Claim:
A hot rolling apparatus for manufacturing a metal plate by hot-rolling-treating a metal material including copper, comprising: a rough rolling device for rolling-treating the metal material, which has been heat-treated, a plurality of times with a back-and-forth movement of the metal material, to mold into a metal plate; a heat retention/application treatment device for applying heat to the metal plate molded by the rough rolling device and retaining heat of the metal plate at lower temperatures than in the heating treatment, over its length after molding, without applying bending to the metal plate when applying heat thereto and retaining the heat thereof; a finish rolling device for further rolling-treating the metal plate that has been heat-treated by the heat retention/application treatment device; a cooling device for cooling the metal plate that has been rolling-treated by the finish rolling device; and a support table for movably supporting the metal material from below before and after the rough rolling device while the metal material is moved back and forth by the rough rolling device.