DOI: 10.18503/1995-2732-2025-23-4-31-39
Abstract
Problem Statement (Relevance). The article describes a solution to one of the urgent problems of foundry production – the problem of high residual strength of liquid glass mixtures of heat-curing. Objectives. The research is aimed at practically determining the amount of crushed silicone rubber (CSR) waste in the mixture composition required for its effective softening, and the temperature-time mode of heat treatment of the cores to reduce the likelihood of gas porosity in castings and maintain the main performance properties of liquid glass moulding cores at a high level. Result. By testing standard samples, the best mode of heat treatment of liquid glass mixtures containing CSR waste in their composition was determined, consisting of two stages. At the first stage, the cores are heated in a drying furnace at a temperature of 200°C for 15 minutes. The second stage includes heating the cores in a drying furnace at a temperature of 400°C for 5.5 minutes. The tests also showed that in order to obtain the best combination of operational properties of liquid glass cores of heat curing, it is necessary to add from 2 to 4% (by weight) of CSR waste to the mixture to reduce residual strength. Practical Relevance. The introduction of CSR waste into the composition of liquid glass heat-curing mixtures will allow the production of cores with high strength, good gas permeability, low crumbling and residual strength.
Keywords
production waste, core sand mixture, moulding core, liquid glass mixture, difficult breakdown, softening additives
For citation
Leushin I.O., Vakhidov U.Sh., Subbotin A.Yu., Titov A.V. Using Crushed Silicone Rubber Waste as a Softening Additive for Liquid Glass Core Mixtures of Heat-Curing. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2025, vol. 23, no. 4, pp. 31-39. https://doi.org/10.18503/1995-2732-2025-23-4-31-39
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