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    Wyświetlanie 1-4 z 4
    Tytuł:
    New look at the process of reclamation of moulding sands
    Autorzy:
    Dobosz, S. M.
    Major-Gabryś, K.
    Hosadyna, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380262.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    masa formierska
    innovative foundry materials
    innovative foundry technologies
    moulding sand
    reclaim
    ester hardener
    Opis:
    This paper presents a new perspective on the issue of reclamation of moulding and core sands. Taking as a premise that the reclamation process must remain on the surface of grains some not separated binding materials rests, it should be chosen the proper moulding sand's composition that will be least harmful for the reclaim quality. There are two different moulding and core sands taken into examinations. The researches prove that a small correction of their compositions (hardener type) improves the quality of the received reclaims. Carried out in this article studies have shown that such an approach to the problem of reclamation of the moulding and core sands is needed and reasonable.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 3; 19-24
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the hardener type on the sulfur diffusion from moulding sand to the casting surface
    Autorzy:
    Hosadyna, M.
    Dobosz, S. M.
    Major-Gabryś, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/381690.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    moulding sand
    sulphur diffusion
    nodular cast iron
    masa formierska
    dyfuzja siarki
    żeliwo sferoidalne
    Opis:
    The article is discussing authors examinations concerning the influence of the sulphur diffusion from moulding sand on reduction the efficiency of modifier elements in the process of making the nodular cast iron. In case of magnesium decrease of its content is observe, as a result of forming the magnesium sulphide. In consequence the participation of magnesium is falling below the concentration essential to create a spheroid graphite. The source of sulphur in no-bake sand with resin modified by furfuryl alcohol is a hardener, on the basis of sulphonic acids and sulphuric acid. Described examinations relate to no-bake sands made on the warp of fresh quartz sand.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 2 spec.; 87-92
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of Glassex additive on properties of microwave-hardened and self-hardened moulding sands with water glass
    Autorzy:
    Major-Gabryś, K.
    Dobosz, S. M.
    Jakubski, J.
    Stachowicz, M.
    Nowak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382492.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    masa formierska
    szkło wodne
    mikrofale
    moulding sand
    water glass
    ester hardener
    microwave hardening
    Opis:
    The article takes into consideration the researches concerning inserting the Glassex additive to the microwaved-hardened and self-hardened moulding sands with water glass. In the research different types of ester hardeners to self-hardened moulding sands with water glass were used. The influence of Glassex additive on retained strength of moulding sands with different hardeners and prepared by different technologies of hardening were tested. The influence of different hardeners and the technology of hardening on retained strength of moulding sand with water glass and the Glassex additive were also estimated.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1; 130-134
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Organic Moulding Sands for Production of Large-Size Castings
    Autorzy:
    Major-Gabryś, K.
    Hosadyna-Kondracka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382360.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative materials
    moulding sand
    organic binder
    furfuryl resin
    hardener
    alkyd resin
    alphaset process
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    piasek formierski
    spoiwo organiczne
    żywica furfurylowa
    utwardzacz
    żywica alkidowa
    Opis:
    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.
    Źródło:
    Archives of Foundry Engineering; 2019, 3; 99-105
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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