The outcomes of studying epoxy-based composite materials supplemented with microsilica are provided in the article. Microsilica was used as a filler. The samples were produced on the epoxy ED-20 basis supplemented with 2, 5 and 10 mas. % of microsilica. The structure and size of finely dispersed filler particles were defined. The obtained composites were tested for resistance to the effect of variable temperatures, corrosive, and abrasion. The study outcomes proved that samples supplemented with 2% of microsilica are more resistant to acid and alkali as well as to petrol than those ones supplemented with 25% of microsilica. Besides the amount of the filler from 2 to 10% doesn’t sufficiently affect the resistance to variable temperatures. When microsilica is added to epoxy resin, it causes scuff resistance increase. The conducted testing proved that the developed composite materials are resistant to the effect of variable temperatures, corrosive, and abrasion. This enables to use these materials as coatings and anti-corrosion protection during machine maintenance.

This article is devoted to modeling the pressing process of an experimental screw press for safflower oil production in small enterprises of the grain processing industry. The theoretical analysis for developing the process of oil pressing in a screw press is considered. Using methods of mathematical modeling, the problem of squeezing the liquid phase from dispersed material is described and solved. The basic scheme and characteristics of the press equipment and the principle of its work are presented. The proposed method of the theoretical calculation of the pressing process helps to determine the optimal parameters and to press safflower oil using the proposed design of the screw press. During the process of pressing, the highest value of oil yield is reached at the diaphragm gap of δ = 0.1 mm and screw rotation speed of ω = 6.2 rad/s.

Epoxy resin‐based composite materials were investigated. Samples were made of epoxy resin ED‐20 with the addition of different amounts of microspheres. Structure and sizes of small filler particles were determined. The derived compounds were tested for resistance to alternating temperatures and corrosive media. The results demonstrated that samples with the addition of 10 % of microspheres are more resistant to the impact of 25 % acid and alkali, as well as to gasoline. At the same time, the amount of the filler from 2 to 10 wt % does not influence the resistance to alternating temperatures significantly. The conducted tests demonstrated the resistance of the developed composite materials to alternating temperatures and corrosive media, which allows using them as corrosion‐resistant coatings for metal structures and in machine maintenance.