At present, many kinds of welding technologies have been used in the market, including ultrasonic welding, hot plate welding, laser welding, vibration friction welding, infrared welding, hot pile welding and hot air welding. In these welding processes, infrared welding technology with its unique advantages is more and more favored by the market. One of the advantages of this technology is that it uses non-contact heating method to heat the plastic work-piece. The surfaces of the two parts to be welded can be melted quickly under the irradiation of infrared ray, and then they are bonded together after being pressed and cooled, and the welding strength is very high. This means that even the complex 3D surface to be welded can be plasticized. Accordingly, many design schemes that cannot be realized by other welding processes can be easily realized here. Therefore, infrared welding technology is especially suitable for parts with complex curved surface and large-scale structural plastic parts. INDRO plastic parts Infrared welding machine is special for welding pleated filter cartridges plastic end caps and other plastic pieces.