Hot melt butt welder use and inspection content

Update:09 Oct 2019

The hot melt butt welder is a special welding equipment […]

The hot melt butt welder is a special welding equipment that applies hot melt butt joint technology to weld thermoplastic pipe fittings. The welding frame of the hot melt butt welder is separate from the operating system. The whole machine is composed of hydraulic operation console, welding frame and fixture, electric heating plate and electric milling cutter.

The welding preparation before the hot melt butt welding machine is mainly to check whether the welding machine condition meets the working requirements. For example, check whether the fasteners in various parts of the machine are detached or loose; check whether the electrical connection of the whole machine is correct and reliable; check whether the hydraulic oil in the hydraulic tank is sufficient; confirm that the power supply matches the requirements of the tool input; whether the heating plate meets the requirements (; trial operation of milling cutters and oil pump switches, etc.


Then put the kava with the same pipe specifications into the rack; set the heating plate temperature to the welding temperature (the welding temperature of the polyethylene pipe channel is 200~230 °C), and wipe the heating plate with soft paper or cloth alcohol before heating. Surface, but be careful not to scratch the PTFE release layer.


The welding of the hot melt butt welder shall be carried out in accordance with the parameters of the welding process card. When necessary, it should be appropriately adjusted according to changes in weather, ambient temperature, etc. First, clean the dirt on both ends with a clean cloth, and place the pipe in the frame slip, so that the length of the two ends is equivalent.


Then install the milling cutter, first turn on the power switch of the milling cutter, then slowly close the welding ends of the two pipes, and apply appropriate pressure until there are continuous chips at both ends, remove the pressure, wait a moment, then exit the movable frame, close Drop the milling cutter power supply. Next is to take out the milling cutter, close the ends of the two tubes and check the alignment of the two ends.


Measure the drag force, this pressure should be superimposed on the process parameter pressure to get the actual use pressure. Also check if the heater plate temperature has reached the set value. After the temperature of the hot plate of the hot-melt butt welder reaches the set value, it is placed in the frame and a predetermined pressure is applied until the pressure is reduced to a predetermined value when the small curl sides of the two sides reach a predetermined width, and heat is absorbed.

After the time is reached, the movable frame is retracted, the heating plate is quickly taken out, and then the two pipe ends are closed. The switching time should be as short as possible and cannot exceed the specified value. After cooling to the specified time, the pressure is released, the slips are released, and the connected pipes are taken out.