corner welding machine This machine is used for PVCdoor and window welding processing.the four heads can work at the same time .And it enables a one-step welding for rectangle window frame and windowpane. Parameter Working air pressure 0.5 0.8Mpa Air consumption 200/min Input power 7.0KW input power source 380V 50HZ Welding profile height 20 120 welding profile width 120 welding range 350×350 3000×1800 Dimension 5000×2000×2800 Weight 3500kg