Abstract
Modern foundry production sets tasks to reduce the cost, improve the quality and presentation of castings, their accuracy, as well as to improve the environmental safety of production. The solution of these problems is largely connected with the development of new non-stick formulations and their optimization using experimental planning methods. This article presents the results of a study using a complete factor experiment 23 to optimize the properties and component composition of a non–stick paint based on a refractory filler of alumochrome powder, a binder – polyvinyl butyral in combination with a modified phenol–formaldehyde resin of the SFPR-050 brand and a solvent - isopropyl alcohol. During the experiments, mathematical dependences of viscosity, density, thickness of the paint layer and strength on the amount of refractory filler alumochrome powder, polyvinyl butyral binder and phenol-formaldehyde resin were obtained. Based on the obtained equations, the optimal ratios between the binder and the filler were selected, which were used when mixing the paint, providing the best technological properties of the coating. The obtained mathematical dependences are an effective apparatus for the operational regulation of paint compositions in conditions of instability of the properties of the materials used and variations in the parameters of the technological process. The practical use of the research results will allow the company to obtain a real economic effect not only by reducing the cost of casting paint in comparison with zirconium, but also by improving the surface quality of castings, reducing the cost of separating the prig from castings.
Keywords:
Non-stick paint, self-drying coatings, alumochrome filler, mathematical planning method, viscosity, strength.