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Insights from Dukane

Oct 6, 2010

Understanding Ultrasonic Stack

It is essential that the mating faces between an ultrasonic transducer/booster and a booster/horn be flat and parallel. If any air gaps remain, there will be a resultant loss in power output and efficiency. Coupling may be so poor that it might prevent the starting of an ultrasonic stack. The condition of excessive crowning, or… Continue Reading Understanding Ultrasonic Stack

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Sep 28, 2010

Ultrasonic Boosters

The boosters serve two purposes; second mounting point for the stack assembly and either amplifying or reducing the amplitude.  Like the transducer, the boosters have a nodal point.  At the nodal point there is a mounting ring designed to fit into the press system or machine mount applications.   There are two types of mounting ring… Continue Reading Ultrasonic Boosters

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Sep 24, 2010

Effect of Black Colorant on Ultrasonic Staking.

Sometimes it is difficult to disperse black pigments on polymers, resulting in agglomerates or clumps of pigment particles. These can make for places where cracking can occur when the plastic is stressed. This could be worse in the area of ultrasonic staking, since the polymer is likely to be somewhat weakened by the welding process.… Continue Reading Effect of Black Colorant on Ultrasonic Staking.

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Sep 13, 2010

The 6 quick steps to a successful ultrasonic assembly

Do you have an application that you think could be ultrasonically assembled? Wondering how to get from a couple of pieces of plastic to an assembled part? This is how our sales engineers tackle an application. While we don’t expect our customers to perform each of these steps, it’s important they be involved in this… Continue Reading The 6 quick steps to a successful ultrasonic assembly

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Aug 31, 2010

How Tight is Tight Enough?

It is important to assemble and tighten your ultrasonic tooling stack to a proper torque. Just assembling the tooling stack as tight as possible could be detrimental to the tooling stack components. For example: the threads on an aluminum booster or aluminum horn can be stripped out due to over-tightening. Conversely, not using enough torque… Continue Reading How Tight is Tight Enough?

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Aug 27, 2010

Vibration Welding and Compatibility of Materials

For most applications, you weld the same material to the same material, example (ABS to ABS). To bond two thermoplastic parts it is necessary that the materials be chemically compatible. Otherwise, even though both materials melt at the same temperature no molecular bond will occur. A good example of this is polypropylene and polyethylene. Both… Continue Reading Vibration Welding and Compatibility of Materials

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