MOLD AND ROD MIXTURES STRUCTURING BY STEAM-MICROWAVE SOLIDIFICATION METHOD
Purpose – to investigate the properties of sand-sodium-silicate mixtures structured in steam-microwave environment (SMS-process).
Methods. In these studies, to compare the properties, rods have been made by CO2 process and by steam-microwave solidification method. Mixtures have been made from 1K3O3016 quartz sand and sodium silicate solute with specific density of 1440 kg/m3 and silicate modulus MSiO2 = 2.93. Obtained samples compressive strength has been determined in accordance to GOST 23409.7-78, samples crushability – in accordance to GOST 23409.9 and gas-generating ability – in accordance to GOST 23409.12-78.
Results. Molds and rods manufactured by the method of steam-microwave solidification (SMS-process) immediately after structuring are suitable for use because they have high strength, practically contain no moisture and, accordingly, practically non-gas-generating, i.e. do not require subsequent drying. SMS method is suitable for making castings from steel, cast iron and non-ferrous alloys due to possibility of casting molds and rods producing from mixtures with SSS content from 0.5 to 1.5 %. In this way it is possible to make rods and molds of any complexity, and their limitations in weight and size will be due only to used microwave (ultrahigh-frequency) radiation chamber load capacity and working space size.
Originality. For the first time the properties of sand-sodium-silicate mixtures, which have been structured in steam-microwave environment (by SMS-process), using 1 ... 3 % (by weight) of dried dispersed sodium silicate solute in quartz sand, and quartz sand cladded with 2...6 % sodium silicate solute and dried to quicksand condition have been discovered.
Practical implications. Structuring by SMS-process can be used for manufacturing of sand-sodium-silicate molds and rods, weighing up to 6 kg, in single, small and small-scale castings production from ferrous and non-ferrous alloys
Solonenkon, L., Prokopovitch, I., Repyakh, S., Sukhoi, K., Dmytrenko, D. (2019). System analysis of modern areas of increasing environmental and sanitary hygienic safety of using cold hardening mixtures in foundry. Proceedings of Odessa Polytechnic University: Scientific, science and technology collected articles, 1(57), 90-98
Holtzer, M. (2011). Światowe tendencje rozwojowe w zakresie mas formierskich i rdzeniowych pod kątem oddziaływania na środowisko. Przegląd Odlewnictwa, 3-4, 112-119
Golotenkov, O. N. (2004). Formovochnye materialy. Penza: Izd-vo Penz. gos. un-ta
Illarionov, I. E., Vasin, Iu. P. (1992). Formovochnye materialy i smesi. Monografiia. Ch. 1. Cheboksary: Izd-vo Chuvash. un-ta
Kukui, D. M., Skvortsov, V. A., Andrianov, N. V. (2011). Teoriia i tekhnologiia liteinogo proizvodstva. Ch. 2. Tekhnologiia izgotovleniia otlivok v razovykh formakh. Minsk: Novoe znanie; M.: INFRA-M
Nekrasov, G. B., Odarchenko, I. B. (2015). Osnovy tekhnologii liteinogo proizvodstva. Ruchnoe i mashinnoe izgotovlenie form i sterzhnei. Minsk: Vyshehishaia shkola
Zhukovskii, S. S. (2010). Kholodno¬tverdeiushchie sviazuiushchie i smesi dlia liteinykh sterzhnei i form: spravochnik. Moskva: Mashinostroenie
Boldin, A. N. (2006). Liteinye formovochnye materialy. Formovochnye sterzhnevye smesi i pokrytiia. Spravochnik. Moskva: Mashinostroenie
Patent 122538, Ukraina. (2020). Sposib vyhotovlennia lyvarnykh form i stryzhniv z ridkoi sklianoi sumishi.
Patent 2094164, Russia. (1997). Sposob izgotovleniia liteinykh sterzhnei i form iz zhidkostekolnykh smesei.