Experimental research into feasibility of cellulose‑based shell core‑making technology

This paper explores opportunities for improving shell core‑making technology using an inorganic binder – liquid sodium silicate – by integrating the advantages of the V‑Process and a sodium silicate‑based core‑making process, which employs primary cellulose or aqueous suspension of pulped cardboard fibers as the principal component of a core molding mixture. A core‑making technology for cellulose‑based, sodium silicate‑bonded shell cores, in which pulped cardboard serves as the cellulose source, has been presented. This technology includes preparatory operations such as milling and swelling of primary cellulose, addition of both water and liquid sodium silicate, shell formation, drying, filling the shell with dry quartz molding sand or a recycled core mixture, sealing, and final drying of a cellulose‑based, sodium silicate‑bonded shell core in a drying oven. The results of experimental research into the physical and technical properties of cellulose‑based, sodium silicate‑bonded shell cores have been demonstrated, and the prospects for industrial application of the proposed core‑making technology have been discussed.

1. Steele R., Kerns K., LaFay P. [et al.] Iron and Steel Castings and Core Production Results from Finer Grades of Chromite Sand in Shell Applications. International Journal of Metalcasting, 2025, vol. 19, pp. 635–642.

2. Sundaram D., Svidró J. T., Diószegi A. Thermal Analysis and Gas Generation Measurement of Foundry Sand Mixtures. International Journal of Metalcasting, 2025, vol. 19, no. 3, pp. 1732–1740.

3. Hoolikantimath N. P., Dodamani S., Guptha K. G. [et al.] Influence of Metal Casting Temperature and Cations on Phase Transformation of Silica Sand to Cristobalite. International Journal of Metalcasting, 2023, vol. 17, pp. 2038–2049.

4. Khan M. S., Szucki M. Numerical and Experimental Analysis of Amine Flow in Foundry Sand Cores. Proceedings of the 10th World Congress on Mechanical, Chemical, and Material Engineering (MCM’24), 2024, article HTFF 253.

5. World Congress on Mechanical, Chemical, and Material Engineering (MCM’24), 2024, article HTFF 253.

6. Kukartsev V.A., Kukartsev V. V., Tynchenko V. S. [et al.] The Technology of Using Liquid Glass Mixture Waste for Reducing the Harmful Environmental Impact. Materials, 2022, vol. 15, no. 3, article 1220.

7. Delimanová P., Vasková I., Kožej O. The Study of the Influence of Core Mixtures with Varying Ratios of Foundry Sand. International Journal of Metalcasting, 2025.

8. Ha T., Kim J., Lee Y. [et al.] Effect of Roundness and Surface Roughness of Foundry Sand on the Temperature Change of Sand Cores for Aluminum Casting. Metals, 2025, vol. 15, no. 1, article 88.

9. Tkachenko S. S., Sokolov A. V., Druzhevsky M.A. [et al.] Issledovanie sostavov zhidkostekol’nyh HTS s peskom Novinskogo mestorozhdenija. Soobshhenie 1 [Research of the liquidglass HTS compositions with sand of the Novinsky deposit. Message 1]. Lit’e i metallurgija = Foundry production and metallurgy, 2023, no. 1, pp. 35–40.

10. Gutko Yu. I., Voytenko V. V. Issledovanie teplojomkosti peschano‑zhidkostekol’nyh litejnyh sterzhnej s soderzhaniem morskoj rakushki [Research into Heat Capacity of Sand‑Based Sodium Silicate‑Bonded Cores Containing Sea Shells]. Strukturnaja modernizacija nauki kak osnova ustojchivogo razvitija obshhestva: sb. st. po itogam Mezhdunar. nauch.‑prakt. konf. = Structural Modernization of Science as Foundation for Sustainable Societal Development: Proceedings of International Scientific and Practical Conference. Sterlitamak, AMI Publ., 2023, pp. 61–65.

11. Gutko Yu. I., Voytenko V. V. Eksperimental’nye issledovanija vlijanija melkodispersnyh metallicheskih poroshkov na fiziko‑tehnicheskie harakteristiki peschano‑zhidkostekol’nyh litejnyh sterzhnej [Experimental impact study of ultrafine metal powders on tech‑ nical characteristics and physical properties of foundry sodium silicate sand cores]. Lit’e i metallurgija = Foundry production and metal‑ lurgy, 2024, no. 1, pp. 20–25.

12. Semple K. E., Zhou Ch., Rojas O. J. [et al.] Moulded Pulp Fibers for Disposable Food Packaging: A State‑of‑the‑Art Review.

13. Food Packaging and Shelf Life, 2022, vol. 33, article 100908.