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2021 №07 (03) DOI of Article
2021 №07 (05)

The Paton Welding Journal 2021 #07
TPWJ, 2021, #7, 19-23 pages

Heat-pulse welding of woven polymeric sheet materials

M.G. Korab, M.V. Iurzhenko, A.V. Vashchuk and A.M. Galchun
E.O. Paton Electric Welding Institute of the NAS of Ukraine 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 filter 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 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 of 0.8 mm diameter was developed. During one cycle of heat-pulse welding, two longitudinal welds, the so-called T-shaped welt seams are formed, the shape and size of which depend on the heating mode of the polymeric material. Welded filter bags were turned before using in such a way that T-shaped seams in the working environment were directed inwards and the load on dangerous areas of welds was reduced. Mechanical tests of welds of filter polyester fabric produced by heat-pulse welding showed a sufficient level of their mechanical strength. To control the quality of the finished filter bags, it is sufficient to visually inspect the welds for leaks or other obvious defects. Results of the work is the technology of manufacturing filter bags from mesh polyester fabric by means of heat-pulse 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 filter bags made of ultra-thin polymeric fabrics. 9 Ref., 8 Figures.
Keywords: thermoplastics, welded joints, polyester fabric, heat-pulse welding

Received 21.02.2021


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