Horn and Booster Materials

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Boosters, as discussed earlier, are typically of standard design, whereas a horn (sonotrode), the vibrating component actually contacting the work, can be any of a wide variety of designs. These can be as as simple as cylinders or rectangles, possibly … Continued

Basic Process Variables

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The heating rate in ultrasonic welding is the product of the loss modulus of the material, frequency, clamp force, and the square of amplitude. Loss modulus is the ability of the material to convert repetitive variation in compressive load into … Continued

Amplitude and Gain

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Amplitude can also be controlled by varying the shape of the acoustical tooling components. The basic unit of ultrasonic tooling, the horn, sonotrode, or coupling bar, is in its simplest form when it is a cylinder of metal, typically aluminum, … Continued

1960s to 1980s Ultrasonic Welders

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Some form of amplitude control was available fairly early in the history of ultrasonic plastics assembly, even before ultrasonic welders had any other form of process control. Amplitude can be controlled either electronically or acoustically. Amplitude is typically defined as … Continued