What Is Ultrasonic Spot Welding

Ultrasonic spot welding is a technique for assembling two thermoplastics without a designed forming hole and welding line. Spot welding is suitable for parts with high strength requirements and large volume. Some extrusion molding and connection of thermoplastic parts, as well as the connection of parts with complicated geometry and difficult to reach welding surface, can be used for most thermoplastic materials.

 

Ultrasonic spot welding from the tip to the end of the section, the plastic at the distal end is melted and under squeezing the melted plastic flows to the welding head cavity with an annular arc, forming a convex ring on the surface of the plastic part Steps to connect the upper and lower plastic parts. The standard plastic part structure requires that the diameter of the circular step of the distal plastic part is 3 times the material thickness, and the height of the distal end protruding step is 1.5 times the material thickness.

 

Ultrasonic spot welding can be achieved with an ultrasonic manual spot welding machine or automated equipment to implement this process. Nowadays, it has been widely used in the welding of auto parts, such as the welding of automobile sound insulation cotton, the welding of sensor brackets (commonly known as ultrasonic insert welding in our industry) and so on.