... 2. PLC programmed control systems and human-computer interface for adjusting welding parameters.3.The machine frame is weld ... , withStep in the process, save time.(6) suitable for very large plastic welding.Principle of Ultrasonic Plastic Welders: Ultrasonic ... : folder, album, folding boxes,PP hollow board,pen loops,ink cartridges, toner cartridges.Medical Daily: watches, kitchen utensils, oral ...