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Oprettet 14. October 2020 kl. 06:56
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This method is mostly used for parts with complex geometric structures

This method is mostly used for parts with complex geometric structures. If the butt welding or reinforced butt welding head needs to be beveled, the bevel is generally 'V' type and 'x' type. The welding rod is perpendicular ptfe coated fiberglass adhesive tape to the welding surface, and the welding torch is at 45.

After welding, the welding seam is machined to the required degree. Figure 1 The tensile properties of soluble polytetrafluoroethylene Before welding, clean the joints of the PTFE parts to be welded with acetone and other solvents. This method can be used for multi-layer and multi-pass welding. The welding strength is slightly lower than that of hot compression welding, but it is more commonly used.

There are three welding methods for hot air welding: lap welding, butt welding and reinforced butt welding. The most important thing in the hot-air welding method is the selection of the electrode. The fusible polytetrafluoroethylene brand Teflon PFA just meets the requirements of this process, not only has good weldability, but also the weld strength after welding has good resistance to strength, as shown in Figure 1. Figure 2 Schematic circle of PTFE hot-air welding Other welding parameters are shown in Table 1.

The left and right corners are close to the weldment, keeping a distance of 5 10 mm from the welding surface, as shown in Figure 2. Since PTFE itself has low adhesion and is not easy to be wetted, it is necessary to choose an electrode that has good meltability and melt fluidity and can effectively wet PTFE. The welding method and PVC Welding is similar. . The welding and transportation method is similar to that of PVC welding. Table 1 Hot air welding parameters of PTFE. Choose the joint form according to the strength and process requirements of the weldment



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