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Contents of the issue
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: firstname.lastname@example.org
Abstract 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
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