Ultrasonic joining apparatus and absorbent article manufacturing apparatus

摘要

An anvil has a temperature adjustment mechanism including a heater. The anvil has a heat transmitter transmitting heat generated by the temperature adjustment mechanism. The anvil has a temperature sensor detecting a temperature of an anvil attachment portion in which the anvil of rotating drum installed. The ultrasonic joining apparatus includes a controller configured to control a temperature to which the rotating drum should be heated by the temperature adjustment mechanism. The controller controls a heat generation amount of the temperature adjustment mechanism on the basis of a detection result by the temperature sensor. The temperature adjustment mechanism and the heat transmitter are installed in each of the multiple anvils.

主权项

1. An ultrasonic joining apparatus, comprising:
a rotator made of a member expansible or contractible by heat; a plurality of anvils provided at predetermined intervals in a rotation direction of the rotator; an ultrasonic horn configured to output ultrasonic vibrations; and a temperature adjustment mechanism configured to adjust a temperature of the rotator, wherein the rotator and the ultrasonic horn are arranged to face each other with an intermediate web being conveyed therebetween, the intermediate web including a first continuous web and a second continuous web overlapping each other, each of the plurality of anvils and the ultrasonic horn pinch a corresponding region of the intermediate web to perform ultrasonic joining on the corresponding region, wherein each of the anvils includes:
a projection protruding in a radial direction of the rotator;a plurality of protrusions protruding from the projection in the radial direction; anda heat transmitter configured to transmit heat generated by the temperature adjustment mechanism to the rotator, the temperature adjustment mechanism and the heat transmitter are arranged between a rotational axis of the rotator and the projection, the temperature adjustment mechanism and the heat transmitter are arranged in each of the plurality of anvils, and the temperature adjustment mechanism is configured to adjust the temperature of the rotator on a per anvil basis.