The connection interface of the PE hot melt machine for hot fusion butt joint 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 the pressure is here Cool and solidify in the state to form a firm connection.
Before the PE hot melt machine is heated, the two ports of the pipe to be welded need to be milled, so that one is to make the welding surface more flat; 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 process of the entire welding process of the PE hot melt machine is adjustment, heating, switching, seam pressurization and cooling.
Because the materials in the viscous flow state on the interface flow and diffuse during the butt joint, too much flow is not conducive to diffusion and entanglement, so the flow must be limited to a certain range to achieve "welding after melting" in the limited flow. Therefore, the key to the PE hot melt machine docking process is to adjust the three parameters of temperature, time, and pressure during the docking process. The performance, stress status, geometric form and environmental conditions of the connecting interface material must be considered together to achieve reliability. Fusion welding.
Tests should be conducted according to the general rules and the characteristics of the respective materials used to evaluate the welding quality. After reaching the system standards, the process specifications of various 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 procedures.
The heating plate and milling cutter are necessary for the PE hot melt machine whether it is manual or hydraulic. 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 pipes. A lot of pressure is required for milling, heating and cooling, which is generally difficult to achieve by manpower.
