Many people who are new to PE construction often ask questions about the operation of Electrofusion welding machine. Although there are detailed instructions in the manual, there are still many users who cannot grasp it. The connection interface of the electrofusion welding machine for thermal welding is flat. The method is to heat the two identical connection interfaces with a hot plate to a viscous fluid state, remove the hot plate, and then apply a certain pressure to the connection interface, and in this pressure state Cool down and solidify to form a firm connection.
Before heating, it is necessary to mill the two ports of the pipe to be welded, so that one is to make the welding surface more flat, and the other is to remove the plastic oxide layer on the surface of the port to make the same molecule melt more thoroughly. The main processes of the entire welding process are adjustment, heating, switching, seam pressure and cooling.
The materials in the viscous flow state at the interface flow and diffuse during the butt joint. Too much flow is not conducive to diffusion and entanglement. Therefore, the flow must be limited to a certain range to achieve "post-melting welding" in the limited flow. Therefore, the key to the docking process is to adjust the three parameters of temperature, time, and pressure during the docking process. The performance, stress status, geometric shape and environmental conditions of the connection interface material must be considered together to achieve reliable welding.
Tests should be conducted according to general rules and the characteristics of the respective materials used to evaluate the welding quality. After reaching the system standards, the process specifications of each variety and specifications should be determined, and the production and on-site installation of welded pipe fittings should be carried out according to the specified process parameters, methods and steps.
In the Electrofusion welding machine, whether it is manual or hydraulic, heating plates and milling cutters are necessary. The difference is that the former relies on manual control, while the latter is powered by a hydraulic system to achieve semi-automatic control, especially for larger diameter pipelines. A lot of pressure is required for milling, heating and cooling, which is generally difficult to achieve by manpower.
