It is noted that the level of mechanical properties of polymer products manufactured with the help of traditional technologies exceeds that of products made by 3D printing. The relevance of studying various methods of strengthening 3D printed products is shown, for example, the method of vacuum impregnation in epoxy compounds. (Research purpose) To determine the dependence between the quality of impregnation of 3D printed parts of agricultural machinery and the viscosity of the impregnating epoxy compound selected. (Materials and methods) The viscosity of the impregnating epoxy compound was changed by adding such diluents as acetone and DEG-1. The viscosity of the compound was measure by a rotational viscometer. The magneto drive pinion of the MTZ tractor starting engine and the auger pin support of the John Deere cutter bar were chosen as the objects for impregnation. The components were produced by a 3D-printer using FDM technology. After impregnation, the products were cut in certain sections to assess the existence of unfilled areas. The amount of resin hardened on the product surface was estimated. (Results and discussion) It has been found that acetone reduces viscosity 2 times more efficiently than DEG-1. Since acetone cost is lower, it was used for the subsequent experiments. For the impregnation of agricultural machinery parts, three levels of viscosity were chosen: the high level, corresponding to the 16 pascal-seconds initial viscosity of epoxy compound; the average level of 8.8 pascal-seconds, corresponding to the injection of 0.5 percent of acetone (by weight); the low level of 6.5 pascal-seconds, corresponding to the injection of 1.5 percent acetone (by weight). It was found that products impregnated with high and low viscosity compounds contained many pores in cross sections and a large amount of compound on the surface. (Conclusions) Based on the results of impregnation, the best composition proves to be that with the epoxy resin viscosity of 8.8 pascal-seconds corresponding to 0.5 percent of acetone (by weight). It is proved that the higher compound viscosity does not allow it to eff ectively penetrate into the product, at a lower viscosity, on the contrary, the compound leaks out of the product after impregnation.

3D scanning finds more and more application every year in various fields of science, technology and production. 3D scanners are devices designed to scan physical objects with the possibility of modification and editing of the obtained models in specialized CAD systems. (Research purpose) The research purpose is to consider the possibilities of using 3D scanners in agriculture based on the analysis of existing models and the principles of their operation. (Materials and methods) There were used open information sources dedicated to the issues of 3D scanning. There have been studied the experience of using a 3D scanner based on FNAC VIM. The research was carried out using methods of collecting, studying and comparative analysis of information. (Results and discussion) With the use of a 3D scanner, it is possible to scan various physical objects, obtaining their three-dimensional digital models with high accuracy (the quality of the result depends on the selected scanner model and the scan processing used). The scanning method distinguishes between contact scanners, scanners using structured light, and laser scanners. Tomographs have been allocated to a separate group as a kind of 3D scanners, which make it possible to obtain models of objects with complex internal cavities. The most popular program is Geomagic Design X as a program that allows to obtain a solid-state model from a scan with subsequent editing in various CAD/CAM/CAE systems. The article presents the experiments conducted on the basis of FNAC VIM, showing the possibility of using 3D scanning to obtain a model of a ploughshare and analyze changes in its shape due to wear. (Conclusions) The use of 3D scanning in the agro-industrial complex is relevant as a means of controlling the geometric dimensions of parts at enterprises engaged in the manufacture and repair of agricultural machinery. 3D scanning serves as a convenient tool for conducting scientific research of a wide range.

To date there are a large number of methods for processing polymer materials, both thermoplastics and thermosets. However, most of them are appropriate only for large-scale or mass production of polymer products, while in modern conditions there is a tendency to produce small batches of products of complex configuration. One of the universal methods of processing polymer materials in small-scale production is the molding of products by injection molding without pressure in a vacuum. This process integrates in a single technological cycle of the synthesis of the polymer and its processing. It is suitable for processing most thermosets, as well as for some thermoplastic polymers. In addition to the processing of polymers, this method allows the manufacture of polymer-filled and super-filled composite materials. This work is devoted to a review of the method of free casting in vacuum into elastic forms. The materials used for processing by this method are considered. The materials required for the manufacture of elastic forms are presented. The main stages of the technological process of manufacturing polymer products by this method are described.

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