Research direction of food screw extruder

The screw extruder was first used in the plastics industry, and its theoretical research started earlier, forming a variety of mathematical models used to describe the basic principles of flow and heat transfer in the extrusion process, using these models to achieve accurate extrusion machine simulation Design. The application of extrusion technology in the food industry is slightly later than that in the plastics industry, which is mainly due to the complexity of food raw materials. The model suitable for the extrusion system of simple plastic raw materials cannot be used to simulate the food system. Therefore, food engineers in the development process The problems encountered are more solved by practice. However, in the early 1970s, people began to apply simulation and optimization technology in the field of food extrusion. Citing the principles of engineering and science, they established a system as close as possible to the actual food. The model and simulation system of the extrusion system are very important to guide people to increase their understanding of this complex process, improve the application efficiency of extrusion machine technology, and finally thoroughly understand the basic principles of extrusion, so as to guide the further development of this technology. extremely meaningful.
Optimization of Structural Parameters of Screw Extruder
The performance of the extruder largely depends on the design of the screw. There are many screw parameters and the relationship between them is complicated. The determination of the parameters is related to the performance of the processed material and the product. How to correctly establish the relationship between The mathematical model is one of the current research directions. At present, the main method of designing the screw is empirical, and most of them refer to the design method of the plastic extrusion machine. In the food extrusion machine, there is still a lack of a mature method. 
Analysis of wear resistance of screw and barrel
The screw, barrel, and discharge die of the screw extruder are all components that are prone to wear and tear. In order to improve the service life, stability and product quality of the extruder, it is necessary to conduct in-depth research on the mechanism of wear and choose high-quality wear-resistant Materials are used to manufacture these components. At present, there are relatively few studies in this area. In order to establish a research model of the wear mechanism of the screw and barrel in the food extruder, the following aspects must be started.
(1) Study the wear pattern of barrel and screw;
(2) Choose materials that are both wear-resistant and meet food hygiene requirements;
(3) Carry out wear experiments, analyze the wear results, and propose measures to reduce wear.