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    • 80. 发明申请
    • ULTRASONIC SYSTEM AND METHOD
    • 超声系统和方法
    • WO1997023340A1
    • 1997-07-03
    • PCT/US1996019476
    • 1996-12-06
    • KIMBERLY-CLARK WORLDWIDE, INC.
    • KIMBERLY-CLARK WORLDWIDE, INC.BETT, Thomas, Arthur
    • B29C65/08
    • B29C66/81433B29C65/087B29C65/7443B29C66/1122B29C66/21B29C66/234B29C66/43B29C66/71B29C66/723B29C66/7294B29C66/73921B29C66/80B29C66/83413B29C66/83415B29C66/93431B29C66/93451B29C66/939B29C66/9513B29L2031/4878Y10T156/1737B29K2023/12B29K2023/06
    • An ultrasonic method and system for intermittently changing a condition of a workpiece is disclosed. The ultrasonic system includes an ultrasonic horn and a rotating anvil roll positioned to form a close relationship with each other comprising a nip. One of the ultrasonic horn and the rotating anvil roll includes an outer radial surface having a first length (40) having a first amount of surface area per unit length of the respective outer radial surface, and a second length (42) having a lesser amount of surface area per unit length of the respective outer radial surface. When ultrasonic energy is applied to the ultrasonic horn, the second length changes a condition of the workpiece when applied in the nip, but the first length does not change that condition. The change in condition occurs because the decrease in surface area along the second length (42) increases the ultrasonic energy per unit area, as applied in the nip, to at least the threshold amount necessary to change the condition. Changes in condition of the workpiece include bonding together two or more layers of material, cutting one or more layers of material, or the like. Various patterns and designs can be provided at the working outer radial surface of the ultrasonic horn and/or the rotating anvil roll, for processing the workpiece. In one embodiment, a first discrete length of a pattern repeats multiple times in a single rotation of the anvil roll or ultrasonic horn with respective second discrete lengths therebetween. In another embodiment, the anvil roll or ultrasonic horn includes opposing side portions upon either side of a central region wherein the central region includes the pattern and thus the reduced surface area. The pattern may include lands extending from an underlying base surface to a radius, at the respective outer radial surface, in common with the radius at the first length of the outer radial surface. By having the lands in the outer radial surface of the second length at the same radius as the outer radial surface in the first length, the respective ultrasonic horn or rotating anvil roll comprises a constant radius at its outer radial surface so the ultrasonic system is substantially free from changes in tension on the workpiece caused by surface characteristics of either the ultrasonic horn or the rotating anvil roll.
    • 公开了一种用于间歇地改变工件状态的超声波方法和系统。 超声波系统包括超声波喇叭和定位成彼此形成密切关系的旋转砧辊,包括辊隙。 超声波喇叭和旋转砧辊中的一个包括具有第一长度(40)的外径向表面,第一长度(40)具有相应的外径向表面的每单位长度的第一数量的表面积,以及具有较小量的第二长度(42) 相应的外径向表面的每单位长度的表面积。 当超声波能量被施加到超声波喇叭时,第二长度在施加在辊隙中时改变工件的状态,但是第一长度不改变该状态。 条件变化发生是因为沿着第二长度(42)的表面积的减小使得在辊隙中施加的每单位面积的超声能量增加至少达到改变条件所需的阈值量。 工件状态的变化包括将两层或更多层材料结合在一起,切割一层或多层材料等。 可以在超声波喇叭和/或旋转砧辊的工作的外径向表面设置各种图案和设计,以处理工件。 在一个实施例中,图案的第一离散长度在砧辊或超声波喇叭的单次旋转中重复多次,其间具有相应的第二离散长度。 在另一个实施例中,砧辊或超声波喇叭在中心区域的任一侧包括相对的侧部,其中中心区域包括图案,从而包括缩小的表面积。 图案可以包括在相应的外径向表面处从下面的基底表面延伸到半径的平面,与外径向表面的第一长度处的半径相同。 通过将第二长度的外径向表面中的平台以与第一长度中的外径向表面相同的半径,相应的超声波喇叭或旋转砧辊在其外径向表面上包括恒定的半径,使得超声系统基本上 无超声波喇叭或旋转砧辊的表面特性造成工件上的张力变化。