| 摘要 |
An ultrasonic seam welding apparatus for seam welding at least two sheet-like workpieces piled one above the other by imparting ultrasonic oscillation, including a machine frame, a converter-horn assembly which includes a horn having a circular flat surface perpendicular to, and concentric with, the longitudinal axis of the assembly for being oscillated in a parallel direction to the longitudinal axis of the assembly, a roller rotatably supported on the machine frame and having a peripheral surface being opposed to a radially biased position of the flat surface of the horn away from the axis thereof so as to hold the workpieces under pressure with the aid of spring means for urging the roller downwards between the peripheral surface of the roller and the flat surface of the horn. The seam welding is carried out by imparting the ultrasonic oscillation to the workpieces from the converter horn assembly with the aid of the roller while regularly feeding the workpieces in good manner. Adding of an elastic ring shaped member having a slightly larger diameter than the roller attached at least on one side of the roller further improves the pressing force and guiding function of the roller. |
