How to design ultrasonic welding line?

Ultrasonic welding line is a kind of sharp and thin linear structure preset on the plastic to facilitate the ultrasonic welding of plastic parts. It is also called ultrasonic waveguide welding line or ultrasonic welding line. Its shape is mostly designed as isosceles triangle or semicircle arc, but the height of semicircle arc ultrasonic line with the same cross-sectional area as isosceles triangle is lower than that of isosceles triangle ultrasonic line. When the ultrasonic energy is low, it is not easy to appear ultrasonic false welding, and the ultrasonic energy of semicircle arc section can be evenly distributed in all parts of the welding area, Make full use of the pressure generated by the ultrasonic welding machine and the released energy, not only save energy, but also make the ultrasonic line fully welded, so as to ensure that all parts of the welding area in the narrow space of plastic parts are firmly connected and beautiful; At the same time, on the premise of enough filler, it can save welding space, which is very suitable for narrow welding space, and it can also save the space of ultrasonic line design, and improve the effective utilization rate of design space per unit area.

If the product is required to achieve the function of water and air tightness, positioning and ultrasonic waveguide fuse is the key to success or failure, so the consideration in product design, such as positioning, material and meat thickness, has an absolute relationship with the corresponding proportion of ultrasonic waveguide fuse. In the general requirements of water and air tightness, the height of the guide line should be in the range of 0.5 ~ 0.8mm (depending on the thickness of the product). If it is less than 0.5mm, the function of water and air tightness should be achieved, unless the positioning setting is very standard and the thickness of the meat is more than 5 mm, otherwise the effect is not good;