by Brian Gourley, Sonics & Materials, Inc. The basic principle of ultrasonic assembly involves conversion of high-frequency electrical energy to high-frequency mechanical energy in the form of reciprocating vertical motion, which, when applied to a thermoplastic, can generate frictional heat at the plastic/plastic or plastic/metal interface. In ultrasonic welding, … [Read more...] about Five Factors Influencing a Successful Ultrasonic Weld
Welding
The Principles of Ultrasonic Welding
by Steven A. Williams, Branson Ultrasonics, a business of Emerson Ultrasonic welding is a process used to join two plastic parts together to form a strong, finished assembly. The process relies on high-frequency (ultrasonic) vibrations being generated and applied to the parts via a horn. Welding occurs as the vibrations are absorbed in the interface between the two parts, … [Read more...] about The Principles of Ultrasonic Welding
Ultrasonic Welding: Your Canary?
By Tom Kirkland, tributek.biz . A recent SPE TECH CHAIN post mentioned a molding problem that began with a resin dryer which was not functioning properly. This resulted in charring of the material in a corner of the mold because of outgassing. The molding technician then turned down the barrel heat, which resulted in both excessive shear damage (not noticed) and short … [Read more...] about Ultrasonic Welding: Your Canary?
When Vibration Welding is the Best Choice
by Jeffrey Frantz, Branson Vibration welding has been a process of choice for quite some time in applications that have complex geometries, especially for materials that are difficult to weld, such as glass-filled nylon, polypropylene and polyethylene. Typical applications include, but are not limited to, automotive air conditioning ducts, power steering and brake … [Read more...] about When Vibration Welding is the Best Choice
Q&A: Laser Welding of Plastics
by John Paul "J.P." Kurpiewski, Branson Ultrasonics Corporation What is a laser? In nature, light exists across a spectrum of wavelengths, ranging from very short (X-rays and gamma rays) to very long (radio waves). Humans only can see visible or "white light" of wavelengths from around 430-690 nanometers (nm).1 A laser beam is an amplified concentration of light energy at a … [Read more...] about Q&A: Laser Welding of Plastics