| 2021 №07 (03) |
DOI of Article 10.37434/as2021.07.04 |
2021 №07 (05) |
Avtomaticheskaya Svarka (Automatic Welding), #7, 2021, pp. 21-26
Thermal pulse welding of polymeric materials
M.G. Korab, M.V. Iurzhenko, A.V. Vashchuk, A.M. Galchun
E.O. Paton Electric Welding Institute. 11 Kazymyr Malevych Str., 03150 Kyiv, Ukraine. E-mail: office@paton.kiev.ua
The aim of the work is to test the technology of welding fi lter bags made of polyester ultralight fabric of linen weaving. The tasks are the choice of welding method, creating an experimental installation, adjusting the parameters of the welding process and evaluating the quality of the produced welds. The method of heat-pulse welding with T-shaped (T-shaped) welt seams with continuous penetration and simultaneous cutting of the welded material was chosen. An experimental installation with a heating element made of nichrome wire with a diameter of 0.8 mm was developed. During one cycle of heat-pulse welding, two longitudinal welds are formed, the so-called T-shaped or T-shaped welt seams, the shape and size of which depend on the heating mode of the polymeric material. Welded fi lter bags were inverted before using in such a way that T-shaped welds in the working environment were directed inwards and the load on dangerous areas of welds was reduced. Mechanical tests of welds of fi lter polyester fabric produced by thermal pulse welding showed a suffi cient level of their mechanical strength. To control the quality of the fi nished fi lter bags, it is suffi cient to visually inspect the welds for leaks or other obvious defects. Results of the work is the technology of manufacturing fi lter bags from mesh polyester fabric by means of thermopulse welding of welt seams with continuous penetration and cutting of the welded material is worked out. The welding installation was created. Parameters of a welding mode were established. It was determined that produced welded joints in terms of strength characteristics meet the necessary criteria for the intended use of fi lter bags made of ultra-thin polymeric fabrics. 9 Ref., 8 Fig.
Keywords: thermoplastics, welded joints, polyester fabric, thermopulse welding
Received: 21.02.2021
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