The assembly of thermoplastic materials using vibration welding occurs when two surfaces that come into contact are melted. The increase in temperature needed for the melting process is obtained by rubbing the two pieces to be welded. Pressure is applied to the moving piece in order to keep the parts to be assembled in contact during the welding process. This technology is suitable for welding thermoplastic materials with complex shapes or containing particular materials, offering a valid alternative. In some cases, it is a better option than ultrasound welding.