Annealing a zinc wire prior to forming pellets for air rifles

Objective

Annealing a zinc wire prior to forming a special high velocity air rifle pellet 

End Product

air rifle pellet 

Equipment

• Ambrell 2.4 kW induction heating system, equipped with a remote workhead containing two 0.33µF capacitors for a total of 0.66µF

• An induction heating coil designed and developed specifically for this application.

Materials

Zinc wire 0.18” (4.5mm) dia 

Temperature

572 ºF (300 ºC)

Frequency

253 kHz

Testing

A fourteen-turn coil is used to heat 3.9” (100mm) of zinc wire. The wire is placed in the coil for 5 seconds to reach the desired condition just prior to the forming process. 

Benefits

Induction heating provides:

• Reduced hardness of pellets to prevent damage to the forming dies

• Reduced production time

• High efficiency, low energy cost

• Fast and controllable heat

• Hands-free heating

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