Clean the welder indicator and heating tools before and after hot-melt bonding. Welding indicates that there is dirt, wipe it off with a clean cloth, and the polyethylene residue on the heating tool can only be removed with a wooden scraper; check whether the butt welding machine matches the diameter of the pipe and the specified butt welding cycle; the heating time and heating time of the hot melt connection The temperature should comply with the regulations of the connection tool manufacturer and the pipe and pipe manufacturer. The welding temperature is usually between 200°C and 235°C; the pressure holding and cooling time of the hot melt connection should conform to the requirements of the hot melt connection tool manufacturer and the pipe and pipe manufacturers. According to the manufacturer's regulations, the connector must not be moved or pressured during the holding and cooling time.
The PE pipe hot-melt butt joint should meet the following requirements: Clamp the socket end of the pipe and pipe fittings on the butt welding machine, and clean the socket end; move the movable fixture, plan the connection surface of the pipe and pipe fittings on the milling cutter, and remove the milling cutter , check the connecting surface of the pipe end, so that the gap is not more than 0.3mm; align the two corresponding parts to be connected on the butt welding machine so that they are on the same axis, and the wrong side should not be greater than 10% of the wall thickness; put the heating tool on the between the two connecting surfaces. Make the pipe on the butt welding machine close to the heating tool and apply a certain pressure, and the straight motion melts to form a smooth and symmetrical flanging along the entire outer circumference of the pipe; after heating, the parts to be connected should be quickly separated from the butt heating tool, and a uniform external force should be applied to make They come into contact, forming a uniform flange.
