Piezo-ceramic transducer introduction in the synthetic fabrics ultrasonic welding

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.

References

[1] Tager A.A. Fiziko-khimiya polimerov [Polymer physics and chemistry]. Moscow, Nauchnyy mir Publ., 2007. 576 p. (In Russ.).

[2] Kryzhanovskiy V.K., ed. Tekhnicheskie svoystva polimernykh materialov [Technical properties of polymeric materials]. Sankt-Petersburg, Professiya Publ., 2005. 235 p. (In Russ.).

[3] Komarov G.V. Sposoby soedineniy detaley iz plasticheskikh mass [Methods of connecting parts made of plastic masses]. Moscow, Khimiya Publ., 2007. 288 p. (In Russ.).

[4] Volkov S.S. Svarka i skleivanie polimernykh materialov [Welding and bonding polymeric materials]. Moscow, Khimiya Publ., 2001. 376 p. (In Russ.).

[5] Volkov S.S. Ultrasound welding of brush elements. Svarochnoe proizvodstvo, 2012, no. 10, pp. 42–46. (In Russ.). (Eng. version: Weld. Int., 2012, vol. 26, no. 10, pp. 796–799, https://doi.org/10.1080/09507116.2011.653164)

[6] Volkov S.S. Energy performance of the acoustic unit during ultrasonic welding. Svarka i diagnostika [Welding and Diagnostics], 2012, no. 6, pp. 40–44. (In Russ.).

[7] Volkov S.S., Nerovnyy V.M., Remizov A.L. Influence of the acoustic power of the welding unit on the weldability of plastics during ultrasonic welding. Svarka i diagnostika [Welding and Diagnostics], 2017, no. 5, pp. 25–29. (In Russ.).

[8] Volkov S.S. Effect of dimensions of the gap between the edges on the strength of ultrasound welded joints in rigid plastics. Weld. Int., 2003, vol. 17, no. 6, pp. 482–486, doi: https://doi.org/10.1533/wint.2003.3154

[9] Volkov S.S. Main welding parameters of ultrasound contour welding of polyethylene vessels. Weld. Int., 2011, vol. 25, no. 11, pp. 898–902, doi: https://doi.org/10.1080/09507116.2011.581433

[10] Karkhin V.A. Teplovye protsessy pri svarke [Thermal processes in welding]. Sankt-Petersburg, Izd-vo Politekhnicheskogo universiteta Publ., 2013. 646 p. (In Russ.).

[11] Volkov S.S., Shestel L.A., Sokolov V.A. Development of the process of ultrasonic welding of products from polyethylene terephthalate films. Svarka i diagnostika [Welding and Diagnostics], 2013, no. 2, pp. 58–62. (In Russ.).

[12] Volkov S.S., Shestel L.A., Sokolov V.A. Ultrasonic welding of polyamide sealing gaskets using infrared radiation. Weld. Int., 2016, vol. 30, no. 2, pp. 150–154, doi: https://doi.org/10.1080/09507116.2015.1036535

[13] Volkov S.S. Joining thermoplastics with metallic and non-metallic materials. Weld. Int., 2013, vol. 27, no. 2, pp. 163–166, doi: https://doi.org/10.1080/09507116.2012.695551

[14] Volkov S.S. Effect of fillers and dyes on weldability and service properties of ultrasound-welded joints in plastics. Weld. Int., 2010, vol. 24, no. 9, pp. 734–737, doi: https://doi.org/10.1080/09507116.2010.486179

[15] Volkov S.S. Main methods and technological features of welding dissimilar plastics. Weld. Int., 2008, vol. 22, no. 3, pp. 193–197, doi: https://doi.org/10.1080/09507110802065561