Ultrasonic welding machine
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This document discusses ultrasonic welding and its parameters and applications. It provides information on AMIT BISWAS, his student ID and department. It then discusses the principles of ultrasonic welding including how high-frequency acoustic vibrations are used to create solid-state welds. Several benefits of ultrasonic welding are listed such as eliminating fraying and thread use. The document outlines requirements for materials suitable for ultrasonic welding, including having at least 25% thermoplastic content. It lists applications of ultrasonic welding such as edge neatening of fabrics and joining motifs.
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Ultrasonic welding machine
- 1. AMIT BISWAS ID : 143003014 Department of Textile Engineering Green University of Bangladesh
- 3. INTRODUCTION • ultrasonic welding is an industrial technique whereby high- frequency ultrasonic acoustic vibrations are locally applied to work pieces being held together under pressure to create a solid-state weld.
- 4. a logical connection of a woven or a knitted fabric always continuous.. either press type and or continuous tool depending No SewSewing
- 5. Hot Wedge Hot Air Ultrasonic Hot Air Taping Laser Welding- parameters: • Roller pressure • Speed • Temperatur e Welding- parameters : • Roller pressure • Speed • Temperatu re • Hot air flow Welding- parameters: • Roller pressure • Speed • Amplitude • (Style of wheel) Welding- parameters: • Roller pressure • Speed • Temperature • Hot air flow Welding- parameters: • Roller pressure • Speed • Laser energy
- 6. Principle of Ultrasonic Welding • In ultrasonic welding, frictional heat produced by the ultrasonic waves and force is used for the joining process. Ultrasonic waves (15 to 60 khz) are transferred to the material under pressure with a sonometer. Welding times are lower than 3 s. The welding can proceed with or without the application of external heat.
- 9. •eliminate fraying •eliminate burns on fabrics •eliminate emissions of toxic fumes •eliminate the waiting time for the warm up of the machine •reduce production time •reduce energy consumption •eliminate the use of thread in the seam •coupling two fabrics and/or a fabric and a film •simultaneously punch and weld synthetic fabrics •eliminate the selvage •simultaneously cut and weld synthetic Ultrasonic cutting and sewing allo
- 10. THE REQUIREMENTS OF WELDING • ULTRASONIC TECHNOLOGY CAN BE USED ON FABRICS MADE JUST OF 25% OF SYNTHETIC FIBERS , LIKE POLYESTER, VISCOSE OR RAYON. • THERMOPLASTIC MATERIALS USED
- 11. Most synthetic fabrics suitable ultrasonic welding contain thermoplastic materials with similar melting temperatures and compatible molecular structures. These materials have many of the following characteristics : •Wide melting range •High coefficient of friction •Even thickness •At least 25 % of thermoplastic content •Sufficient stiffness and thickness to accept the energy on the interface of the material ( minimum 0.0127 mm/ 0.0005 inches)
- 12. Ultrasonic Welding 1990 – Today 8304-082 8312
- 13. The application of welding machine • For edge neatening of fabrics • For joining of motif • For sealing the edge of ribbon or lace • For making tie • For shaping the parts of garments • For making button hole