Note: Brassiere Underwire
Objective:
To heat the ends of 0.072 in spring wire, spaced 1/2 in apart, uniformly for the application of nylon powder on a 1 in length of the end. Once heated to 700 °F the nylon powder fuses to the wire creating a protective coating. Underwires have a past history of poking through the supportive garment and scratching the wearer. By adding a protective nylon coating at the ends of the wire form, this uncomfortable situation is avoided.
End Product:
Brassiere underwire
Equipment:
Ambrell 2.5 kW induction heating system including one remote heat station containing two capacitors with a total value of 0.66 μF
a unique five-turn elongated helical coil measuring 2.5 x 8.5 x 2 3/4 in with the lower two turns angled down at the ends.
Materials:
Spring wire
Nylon powder
Temperature:
700 °F
Frequency:
92 kHz
Testing:
The 2.5 kW system along with a unique five-turn elongated helical coil was used to achieve the following results:
700 °F was reached with a twelve-second machine cycle.
A uniform coating was produced as a result of even heating due to the unique five-turn elongated helical coil.
Twelve wire samples were heated simultaneously in the unique work coil.
Benefits:
Visit our Applications Lab to learn more about free applications testing.
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