Industrial Ultrasonic Welders & Assembly Systems

Ultrasonic welders work best with chemically compatible thermoplastics and parts designed with consistent joint contact. Similar materials generally weld most reliably, while some dissimilar thermoplastics may be compatible when their melt temperatures and molecular structures are similar. Joint design, part geometry, wall thickness, alignment, and material additives can all affect weld quality, so application testing is often recommended before production.

When the material, joint design, tooling, and weld parameters are properly matched, an ultrasonic weld can be very strong and, in some applications, approach or exceed the strength of the surrounding material. Ultrasonic welding can also create leak-tight or hermetic seals when the part design and process requirements support it.

A pneumatic ultrasonic welder uses air pressure to drive the welding motion, while a servo ultrasonic welder uses servo-controlled motion for more precise control of weld speed, position, collapse distance, and force. Pneumatic welders are often a good fit for simpler or more forgiving applications. Servo ultrasonic welders, such as Infinity™ Servo Ultrasonic Welder with patented Melt-Match®, are better suited for applications that require tighter repeatability, process control, data visibility, and automation readiness.

Ultrasonic welders are commonly used to assemble thermoplastic parts that require fast cycle times, repeatable weld quality, and clean joining without adhesives, screws, or solvents. Common applications include medical devices, automotive components, electronics, filters, packaging, consumer products, and plastic housings that require strong, consistent welds or seals.

Selection depends on your specific part material, geometry, and production volume requirements. We recommend that you compare plastic welding technologies to determine if ultrasonic welding is the most efficient process for your application. Dukane can also help evaluate the material, part geometry, joint design, strength requirements, production volume, and automation needs before recommending a pneumatic or the Infinity™ Servo Ultrasonic Welder.