## 1 Introduction
The equipment has low requirements for installation space and a very simple setup. The presses are an ideal solution for small and medium-sized farms [17]. Jasko Company (Volgograd, Russia) produces small-sized cold presses with a capacity of up to 60 kg/h. The temperature of the oil at the outlet of the oil press does not exceed 60 \({}^{\circ}\)C, as a result of which its beneficial and therapeutic properties are preserved [18]. The Moldavian plant JSC \"Alimentarmash\" produces the press of the final pressing of oil of the M8-MShP brand with a capacity not less than 7 tons per day, and the residual oil content of the oil cake is not more than 12% [19]. [PERSON] and [PERSON] (2015) developed a design of continuous spiral screws for screw-press oil expellers. The oil flow rate for sunflower oilseeds was 0.003 kg/s at a screw speed of 48 rpm [20]. Known technical solutions for pressing oilseed raw materials have low efficiency, do not always provide high oil yield, and consume a lot of energy. Thus, an important task is to develop a small-sized, low-energy-consuming screw press used in the conditions of farms with small production volumes. The use of a combined press in production conditions will intensify the process of oil separation due to the preliminary crushing of the seed kernel to mint condition. Existing pressing equipment is mainly intended for large-capacity enterprises, is highly productive and energy-intensive, and is not entirely rational for equipping small and medium-sized enterprises. In addition, there are a number of disadvantages in the pressing process that have not yet been resolved. These include the high pressure required for pressing the product and the associated increased energy consumption, and an increase in the number of additional operations before and after pressing, in particular, for pre-grinding the raw material before pressing; loss of raw material during interoperation transportation; and an increase in labor costs. In this regard, as one of the options for intensifying production processes, it is relevant to combine a number of processes in one unit of equipment. It should also be noted that when pressing the product, issues such as establishing and maintaining the duration of pressing, pressing pressure, and residual oil content of the cake are very important, and without taking these factors into account, it is impossible to come to the right engineering solutions [21; 22; 23]. Understanding the underlying physical changes during sunflower seed pressing is essential for optimizing the extraction process and achieving higher oil yields. Factors such as the seed moisture content, pressing temperature, and screw press design influence specific physical transformations. Further research and experimentation will provide valuable insights to enhance the efficiency and sustainability of sunflower seed oil extraction. The scientific novelty of this work lies in the development of a press design that allows for combining the processes of grinding and pressing sunflower seeds to obtain high-quality sunflower oil. The aim of the work is to improve the pressing process on the basis of combined processes of grinding and pressing in one piece of equipment and to study the influence of the degree of grinding of sunflower seeds and the speed of rotation of the press screw on the oil pressing process.