Применение пьезокерамических преобразователей для ультразвуковой сварки синтетических тканей

Abstract

The paper considers high-quality acoustic systems for ultrasonic welding of the synthetic fabrics. Materials, from which they are manufactured, are presented. Work was performed aimed at reducing acoustic power introduced into the welded products at ultrasonic welding of the synthetic fabrics. It was established that introduction of the small-sized piezo-ceramic transducers in welding the synthetic fabrics made it possible to increase efficiency and quality factors of the oscillatory system with low intrinsic losses. It is shown that to increase the ultrasonic welding productivity and reduce the acoustic power, it is necessary to design ultrasonic generators with the auto-tuning to a given oscillation amplitude. Technological opportunities are being considered of seam ultrasonic welding using the highly efficient piezo-ceramic transducers to estimate weldability of lavsan, nylon and polypropylene fabrics. Comparative productivity analysis was performed in ultrasonic welding of the synthetic fabrics using the piezo-ceramic and nickel transducers. Main parameters of modes in the ultrasonic welding of fabrics for the piezo-ceramic transducers were determined. It is shown that parameters of the mode in ultrasonic welding of the synthetic fabrics significantly affect the rate of reaching maximum temperatures in the welded joint zone and determine the heating intensity and, consequently, the welding productivity.