Kinetics of the Binding Process of Furan Moulding Sands, Under Conditions of Forced Air Flow, Monitored by the Ultrasonic Technique

• Autorzy: Matonis Natalia , Zych Jerzy

Identyfikatory

DOI

10.24425/afe.2023.146683

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of research on the kinetics of the binding process of self-hardening moulding sands with an organic binder under conditions of forced air flow at various pressure values. Three moulding sands made using urea-furfuryl resin Furanol FR75A technology were studied. The moulding sands were prepared on a base of quartz sand with an average grain size of d_L = 0.25, 0.29 and 0.37 mm, with permeability values of 306, 391 and 476 m²10⁸Pa x s (for ρ_o = 1.60, 1.60 and 1.61 g/cm³ , respectively). The research was conducted for a resin content of 1% with a constant proportion of hardener to resin, which was equal to 50%. Samples of the tested moulding sands were blown with air at pressures of 0.1, 0.2, 0.4, 0.6, 0.8, and 1.0 bar. The kinetics of the hardening process was monitored using ultrasound technology, according to a previously developed methodology [1]. The research was carried out on an ultrasound testing station equipped with a temperature chamber and an airflow reducer. The tests were conducted at a temperature of 20°C, and of the air flow pressure on the changes in ultrasonic wave velocity in the hardening mouldins sand as a function of time, the kinetics of the hardening process, and the degree of moulding sand hardening were determined. Additionally, the influence of the moulding sand permeability on the course of the hardening process at a constant air flow pressure was determined.

Słowa kluczowe

EN

self-hardening moulding sands; air flow; permeability; degree of harding; ultrasounds

PL

masy formierskie samoutwardzalne; przepływ powietrza; przepuszczalność; stopień utwardzenia; ultradźwięki

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2023
• Tom: Vol. 23, iss. 4
• Strony: 93--98
• Opis fizyczny: Bibliogr. 10 poz., il., tab., wykr.

Twórcy

autor

Matonis Natalia

• AGH University of Science and Technology, Faculty of Foundry Engineering, Poland

• https://orcid.org/0000-0003-2292-6245

autor

Zych Jerzy

• AGH University of Science and Technology, Faculty of Foundry Engineering, Poland

• https://orcid.org/0000-0003-3067-4316

Bibliografia

• [1] Zych, J. (2007). Synthesis of the applications of ultrasonic technology in the analysis of the kinetics of selected processes occurring in molding materials. AGH Uczelniane Wydawnictwa Naukowo-Dydaktyczne. Seria: Rozprawy i Monografie nr 163, Kraków. (in Polish).
• [2] Holtzer, M., Kmita, A. & Roczniak, A. (2014). New furfuryl resins more environmentally friendly. Archives of Foundry Engineering. 14(spec.4), 51-54. (in Polish).
• [3] Lewandowski, J.L. (1997). Materials for casting molds. Kraków: Wydawnictwo Akapit. (in Polish).
• [4] Lewandowski, J.L (1971). Molding materials. Warszawa: Wydawnictwo Naukowe PWN. (in Polish).
• [5] Dobosz, St.M. (2006). Water in molding and core sands. Kraków: Wydawnictwo Akapit. (in Polish).
• [6] Drożyński, D. (1999). Post-surface phenomena in the process of binding masses in the classic cold-box technology. Unpublished doctoral dissertation, AGH Univesity of Science and Technology, Kraków. (in Polish).
• [7] Lewandowski, J.L. (1991). Molding and core sands. Warszawa: Wydawnictwo Naukowe PWN. (in Polish).
• [8] Jamrozowicz, Ł., Kolczyk, J. & Kaźnicva, N. (2016). Study of the hardening kinetics of self-hardening masses at low temperature. Prace Instytutu Odlewnictwa. LVI, 4/2016, 379- 390. (in Polish).
• [9] Matonis, N. & Zych, J. (2022). Plasticity changes of moulding sands with chemical binders caused by increasing the hardenin degree. Archives of Foundry Engineering. 22(2), 71-76. DOI: 10.24425/afe.2022.140227.
• [10] Zych, J. (1999). Patent Nr PL 192202 B1. Kraków.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)