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Wyszukujesz frazę "sand technologies" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Influence of Silica Sand on Surface Casting Quality
Autorzy:
Beňo, J.
Adamusová, K.
Merta, V.
Bajer, T.
Powiązania:
https://bibliotekanauki.pl/articles/383370.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry technologies
innovative materials
castings defects
silica sand
veining
COLD-BOX amine
innowacyjne technologie odlewnicze
materiały innowacyjne
wady odlewów
piasek kwarcowy
Opis:
The current casting production of castings brings increased demands for surface and internal quality of the castings. Important factors, that influence the quality of casted components, are the materials used for the manufacture of moulds and cores. For the preparation and production of moulds and cores, in order to achieve a low level of casting defects, then it used a high quality input materials, including various types of sands, modified binders, additives, etc. However, even the most expensive raw materials are not a guarantee to achieve the quality of production. It is always necessary to choose the appropriate combination of input material together with an appropriate proposal for the way of the production, the metallurgical treatment of cast alloy, etc. The aim of this paper is to establish the basic principles for the selection of the base core mixtures components – sands to eliminate defects from the tension, specifically veining. Various silica sand, which are commonly used in foundries of Middle Europe region, were selected and tested.
Źródło:
Archives of Foundry Engineering; 2019, 2; 5-8
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence green sand system by core sand additions
Autorzy:
Špirutová, N.
Beňo, J.
Bednářová, V.
Kříž, J.
Kandrnál, M.
Powiązania:
https://bibliotekanauki.pl/articles/382483.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ochrona środowiska
innowacyjne technologie odlewnicze
innowacyjne materiały odlewnicze
masa formierska
spoiwo organiczne
environment protection
innovative foundry technologies
innovative foundry material
green sand system
organic binders
active bentonite
Opis:
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.
Źródło:
Archives of Foundry Engineering; 2012, 12, 1; 105-110
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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