C.2.5 The Dynamic Trigger Mechanism
Most welding applications require that pressure be built up on the part
before ultrasonic energy is applied. The Dynamic Trigger Mechanism, an
adjustable, pressure-activated device located between the air cylinder and
the converter, ensures that pressure is applied to the part prior to the
application of ultrasonic energy.
To maintain horn-to-part contact and force as the joint collapses, springs in
the mechanism provide dynamic follow-through. As the plastic melts, the
springs extend to ensure smooth transmission of ultrasonic energy into the
part.
900IW+
C-3
Theory
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