DOI: 10.18503/1995-2732-2026-24-1-32-39
Abstract
Problem Statement. The technological feasibility of employing an organic binder such as epoxy resin in the preparation of core molding mixtures based on ground quartz sand is of significant relevance. The proposed mixtures are intended for the manufacture of thin-walled shell molding cores featuring an internal cavity filled with dry, binder-free quartz sand. The relevance of this research is attributed to the complexity of the knocking-out of large and medium-sized sand cores from aluminum castings. A comparative analysis of the physical and technical properties of shell cores bonded with organic and inorganic binders, as well as the technological features of their production is of both scientific and practical interest. This analysis substantiates the selection of core-making technologies in accordance with stated objectives. Objectives. The research is aimed at conducting experimental research of the physical and technical properties of thin-walled sand shell molding cores bonded with organic binders and featuring an internal cavity filled with dry, binder-free quartz sand, as well as performing a comparative analysis of shell molding cores bonded with both organic and inorganic binders. Methods Applied. The paper contains tests for tensile, compressive, and flexural strength; tests for knocking-out ability of cores from castings; tests for thermal resistance; Epoxy process; V-process. Originality. A core-making technology integrating the advantages of the most promising core-making processes such as the Epoxy process and the V-process has been proposed and studied. Result. The feasibility of employing thin-walled sand shell molding cores featuring an internal cavity filled with dry, binder-free quartz sand during the casting of aluminum and its alloys has been demonstrated. The advantages of such molding cores compared to conventional solid molding cores have been revealed. Practical Relevance. The results of experimental research of the physical and technical properties of thin-walled sand shell molding cores featuring an internal cavity filled with dry, binder-free quartz sand have been presented, accompanied by recommendations for their practical application.
Keywords
molding core, shell, binder, core molding mixture, epoxy resin, quartz sand, strength, knocking-out ability, thermal resistance, physical and technical properties
For citation
Voytenko V.V., Medvedchuk S.A., Breshev V.E., Voytenko G.O. Experimental Studies of Shell Molding Cores Bonded with Epoxy Resin. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2026, vol. 24, no. 1, pp. 32-39. https://doi.org/10.18503/1995-2732-2026-24-1-32-39
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