DSpace

Modern packaging is rapidly developing in all industries. The development of packaging in agriculture, processing, and construction industries is intensive due to a significant share of large-sized cargo (styrofoam plates, rolls of mineral wool, fuel briquettes from agricultural and forest biomass, etc.). Therefore, the urgent task is to create equipment for high-quality packaging of large cargoes. During the large-size packaging process, the stretched film is welded. One of the problems is the need to tighten the package with a film, to ensure the density and strength of the welds, which will withstand the stretching of the film after sealing the formed package. The design of such machines is specific because it includes both the mechanisms of forming the package and the mechanisms of wrapping it with a film followed by welding. The necessity of shrinking large-sized packages during their welding, the use of new, including multi-layer polymer combined materials, requires a reduction in energy consumption, improvement of existing packaging methods and machines that implement them, and replacement of heat shrinking with mechanical shrinking. A new roller mechanism for welding and cooling the film is described. An experimental setup has been developed for researching the process of packing large cargoes. The dependence of the quality of the welding seam of the packaging film on the temperature and force of its welding, as well as the duration of heating and cooling of the seam, was determined experimentally. Basis on the analysis of the results of the experiments, the substantiation of the tightening parameters of large packages was carried out, which makes it possible to calculate the main parameters of the tightening mechanism, the optimal choice of the film wrapping material, and the reliable shaping of the package itself.

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