Apparel Manufacturing 2

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

14. Ultrasonic Welding