
Ultrasonic welding is the process of binding parts together through high-frequency ultrasonic vibrations. Basically, vibrations causes the molecules in the plastic parts to rapidly weld together through ultrasonic energy. The piece creates a solid weld. In addition, no extra materials are required such as bolts, nails or adhesives. During the welding process, applied pressure keeps the parts together.
Depending on clients needs, the operator loads the parts, or they arrive from another station. During this time, the parts sit on fixtures to hold them still during the welding. Next, the horn engages with the parts supplying the ultrasonic energy. From there, the combined parts remove from the system by the operator, moves to the next station or is dropped off in a bin. The time to perform the welding depends on the size and shape of the parts.

Since Craig Machinery’s experience consists of over 50 years, we ensure the process runs smoothly and reduce the number of faults. When supplied with parts, we occasionally provide recommendations to alter the design for the best outcome.
If the part welds incorrectly, the system notifies the operator about the error. If the appearance of the part is important, we recommend a protective film between the horn and the part to eliminate possible damage. To learn more about film and film feeders,
Sometimes, our clients are not ready to invest in a system to mass ultrasonic weld their parts. At Craig Machinery, we possess a variety of frequency lab machines to perform ultrasonic welding on those parts.

During the early onset of the corona virus pandemic, Craig Machinery & Design Inc. was tapped to design and build N95 Mask Making Machines to help address the worldwide shortage for Personal Protective Equipment.
Each N95 Mask Making Machine designed and engineered to produce 12 masks per minute. The machines ultrasonically welded layers of cotton together to form a mold shaped for a close facial fit. More than 75 machines were made and shipped to several countries around the world. To learn more, click the button below.
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