Influence green sand system by core sand additions

• Autorzy: Špirutová N. , Beňo J. , Bednářová V. , Kříž J. , Kandrnál M.
• Języki publikacji: EN

Abstrakty

EN

Today, about two thirds of iron alloys casting (especially for graphitizing alloys of iron) are produced into green sand systems with usually organically bonded cores. Separation of core sands from the green sand mixture is very difficult, after pouring. The core sand concentration increase due to circulation of green sand mixture in a closed circulation system. Furthermore in some foundries, core sands have been adding to green sand systems as a replacement for new sands. The goal of this contribution is: 'How the green sand systems are influenced by core sands?" This effect is considered by determination of selected technological properties and degree of green sand system re-bonding. From the studies, which have been published yet, there is not consistent opinion on influence of core sand dilution on green sand system properties. In order to simulation of the effect of core sands on the technological properties of green sands, there were applied the most common used technologies of cores production, which are based on bonding with phenolic resin. Core sand concentration added to green sand system, was up to 50%. Influence of core sand dilution on basic properties of green sand systems was determined by evaluation of basic industrial properties: moisture, green compression strength and splitting strength, wet tensile strength, mixture stability against staling and physical-chemistry properties (pH, conductivity, and loss of ignition). Ratio of active betonite by Methylene blue test was also determined.

Słowa kluczowe

EN

environment protection; innovative foundry technologies; innovative foundry material; green sand system; organic binders; active bentonite

PL

ochrona środowiska; innowacyjne technologie odlewnicze; innowacyjne materiały odlewnicze; masa formierska; spoiwo organiczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2012
• Tom: Vol. 12, iss. 1
• Strony: 105--110
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr.

Twórcy

autor

Špirutová N.

autor

Beňo J.

autor

Bednářová V.

autor

Kříž J.

autor

Kandrnál M.

• Department of Metallurgy and Foundry Engineering, FMME, VŠB-Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava Poruba, Czech Republic,

Bibliografia

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