Investigation of the different Sand Mixtures Using Cold Box Method in Therms of Collapsibility

Hudák, Henrietta and Grasalkovits, Kinga and Gyarmati, Gábor and Budavári, Imre and Molnár, Dániel and Varga László, László (2021) Investigation of the different Sand Mixtures Using Cold Box Method in Therms of Collapsibility. Materials Science and Engineering, 46 (1). pp. 24-34. ISSN 2063-6792

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Abstract

Expendable sand cores have to meet several criteria to be suitable for forming the internal cavities of castings. The main characteristics of cores are the mechanical properties and thermal behavior during thermal loading. In this article, cold box sand mixtures with different binder and hardener content were investigated in terms of bending strength, col-lapsibility, and thermal distortions. The research was motivated by an industrial problem: during the production of a turbocharger casting, problems with the collapsibility were raised. To study the hardening characteristics-, the retained bending strength, and the thermal be-havior of the sand cores containing different amounts of binder and hardener, bending tests, collapsibility tests, and hot-distortion tests were conducted.

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