| 摘要 |
An ultrasonic welding apparatus performs an ultrasonic welding process to a sheet-like member, the sheet-like member being transported an outer circumferential face of a rotating member, the rotating member rotating about its central axis. The ultrasonic welding apparatus includes: the rotating member; and an ultrasonic processing unit that rotates about the central axis together with the rotating member. The ultrasonic processing unit includes: a horn that vibrates ultrasonically; and an anvil between which and the horn the sheet-like member is sandwiched. At least either one ultrasonic processing member of the horn and the anvil is guided so as to reciprocate in a CD direction, the CD direction intersecting a transport direction of the sheet-like member. And, the at least either one ultrasonic processing member of the horn and the anvil reciprocates in the CD direction with respect to a part of the sheet-like member, the part being wound around the rotating member. Both of the horn and the anvil are in contact with the sheet-like member in a predetermined section during movement in both of a forward path and a return path of the reciprocation, the predetermined section being included in the outer circumferential face of the rotating member and extending in the CD direction. The apparatus further comprises an ultrasonic-energy regulating unit, and the ultrasonic-energy regulating unit makes an amount (J/m) of applied ultrasonic energy per unit length in the CD direction of the predetermined section of the forward path different from an amount (J/m) of applied ultrasonic energy per unit length in the CD direction of the predetermined section of the return path. |
