Ultrasonic plastic welding principle is generated by the generator 20KHz (or 15KHz) high pressure, high-frequency signals, through the transducer system, the signal is converted to high-frequency mechanical vibration, added to the plastic workpiece,
Through the surface of the workpiece and in the intermolecular friction and make the transfer of the interface to the temperature rises when the temperature reaches the melting point of the workpiece itself, so that the interface of the workpiece rapid melting. When the temperature reaches the melting point of the workpiece itself, the interface of the workpiece rapidly melts and then fills in the gap between the interface, when the vibration stops, the workpiece is cooled and shaped under a certain pressure at the same time, and a perfect weld is achieved.
ExpandedMelt welding method
1, fusion welding method
To ultrasonic ultra-high frequency vibration of the welding head in the appropriate pressure, so that the two pieces of plastic friction heat generated by the joint surface and instant fusion bonding, welding strength comparable to the body, the use of suitable workpiece and reasonable interface design, watertight and airtight, and eliminating the inconvenience of using the auxiliaries, to achieve efficient and clean The use of suitable workpieces and reasonable interface design can achieve watertight and airtight, and eliminate the inconvenience caused by the use of auxiliary products to realize efficient and clean fusion welding.
2, riveting and welding method
The ultrasonic ultra-high-frequency vibration of the welding head, pressed against the tip of the plastic products protruding, so that the instantaneous heat melting into the shape of rivets, so that different materials riveted together mechanically.
3, buried
With the welding head of the channel and the appropriate pressure, instantly metal parts (such as nuts, screws, etc.) will be extruded into the plastic hole reserved for fixing at a certain depth, after the completion of the tension, torque can be comparable to the strength of the traditional mold molding can be eliminated from the shortcomings of the injection mold damage and ejection slow.
Ultrasonic welding machine is mainly used for thermoplastic secondary connection, compared with other traditional processes (such as gluing, ironing or screw fastening, etc.), with high productivity, good welding quality, environmental protection and energy saving and other significant advantages.
Ultrasonic plastic welding equipment is widely used in medical devices, packaging, auto parts, fishing gear and other industries, such as disposable infusion filters and plasma separator cups, self-sealing bags, plastic wine bottle caps, dishwasher water wheels, plastic toys, headlights, plastic fake bait, charger shells and cell phone sling welding.
Baidu Encyclopedia - Ultrasonic Welding Machine