Organic Moulding Sands for Production of Large-Size Castings

• Autorzy: Major-Gabryś K. , Hosadyna-Kondracka M.

Identyfikatory

DOI

10.24425/afe.2019.129618

• Języki publikacji: EN

Abstrakty

EN

Recently, some major changes have occurred in the structure of the European foundry industry, such as a rapid development in the production of castings from compacted graphite iron and light alloys at the expense of limiting the production of steel castings. This created a significant gap in the production of heavy steel castings (exceeding the weight of 30 Mg) for the metallurgical, cement and energy industries. The problem is proper moulding technology for such heavy castings, whose solidification and cooling time may take even several days, exposing the moulding material to a long-term thermal and mechanical load. Owing to their technological properties, sands with organic binders (synthetic resins) are the compositions used most often in industrial practice. Their main advantages include high strength, good collapsibility and knocking out properties, as well as easy mechanical reclamation. The main disadvantage of these sands is their harmful effect on the environment, manifesting itself at various stages of the casting process, especially during mould pouring. This is why new solutions are sought for sands based on organic binders to ensure their high technological properties but at the same time less harmfulness for the environment. This paper discusses the possibility of reducing the harmful effect of sands with furfuryl binders owing to the use of resins with reduced content of free furfuryl alcohol and hardeners with reduced sulphur content. The use of alkyd binder as an alternative to furfuryl binder has also been proposed and possible application of phenol-formaldehyde resins was considered.

Słowa kluczowe

EN

innovative foundry technologies; innovative materials; moulding sand; organic binder; furfuryl resin; hardener; alkyd resin; alphaset process

PL

innowacyjne technologie odlewnicze; materiały innowacyjne; piasek formierski; spoiwo organiczne; żywica furfurylowa; utwardzacz; żywica alkidowa

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2019
• Tom: iss. 3
• Strony: 99--105
• Opis fizyczny: Bibliogr. 20 poz., rys., wykr.

Twórcy

autor

Major-Gabryś K.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Department of Moulding Materials, Krakow, Poland

autor

Hosadyna-Kondracka M.

• Foundry Research Institute, Krakow, Poland

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).