What s the difference between vibration and ultrasonic welding?
Vibration welding brings two halves of a part together under pressure, holding one part half stationary, while the other half is moved back and forth in a linear motion at 120 to 240 cycles per second. Frictional heat is created as pressure and movement are applied to the parts. Ultrasonic welding is the joining of two thermoplastics through the use of frictional heat generated from force and mechanical motion. It is accomplished by converting electrical energy into high frequency mechanical motion (vibrations) and applying that motion to parts under pressure. The vertical motion and force create frictional heat at the mating parts joint area, causing the plastic in the joint area to melt. As the molten plastic solidifies, a molecular bond forms between the plastic part halves.
