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    Wyświetlanie 1-6 z 6
    Tytuł:
    The Compositions: Biodegradable Material – Synthetic Resins as Moulding Sands Binders
    Autorzy:
    Major-Gabryś, K.
    Grabarczyk, A.
    Dobosz, S. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/383210.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    innovative foundry technology
    innovative foundry material
    moulding sand
    furfuryl resin
    biodegradable material
    ochrona środowiska
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    masa formierska
    żywica furfurylowa
    materiał biodegradowalny
    Opis:
    Growing emission requirements are forcing the foundry industry to seek new, more environmentally friendly solutions. One of the solutions may be the technologies of preparing moulding and core sands using organic biodegradable materials as binders. However, not only environmental requirements grow but also those related to the technological properties of moulding sand. Advancing automation and mechanization of the foundry industry brings new challenges related to the moulding sands. Low elasticity may cause defects during assembly of cores or moulds by the manipulators. The paper presents the study of flexibility in the room temperature according to new method and resistance to thermal deformation of self-hardening moulding sands with furfuryl resin, containing biodegradable material PCL. The task of the new additive is to reduce the moulding sands harmfulness to the environment and increase its flexibility in the room temperature. The impact of the additive and the effect of the amount of binder on the properties of mentioned moulding sands were analysed. Studies have shown that the use of 5% of PCL does not change the nature of the thermal deformation curve, improves the bending strength of tested moulding mixtures and increases their flexibility at room temperature.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 75-78
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New Materials in the Production of Moulding and Core Sands
    Autorzy:
    Dobosz, S. M.
    Major-Gabryś, K.
    Grabarczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383336.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    innovative foundry technology
    innovative foundry material
    moulding sand
    binder
    biodegradable material
    ochrona środowiska
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    masa formierskia
    spoiwo
    materiał biodegradowalny
    Opis:
    The article shows the influence of environment requirements on changes in different foundry moulding sands technologies such as cold box, self-hardening moulding sands and green sands. The aim of the article is to show the possibility of using the biodegradable materials as binders (or parts of binders’ compositions) for foundry moulding and core sands. The authors concentrated on the possibility of preparing new binders consisting of typical synthetic resins - commonly used in foundry practice - and biodegradable materials. According to own research it is presumed that using biodegradable materials as a part of new binders’ compositions may cause not only lower toxicity and better ability to reclaim, but may also accelerate the biodegradation rate of used binders. What’s more, using some kinds of biodegradable materials may improve flexibility of moulding sands with polymeric binder. The conducted research was introductory and took into account bending strength and thermal properties of furan moulding sands with biodegradable material (PCL). The research proved that new biodegradable additive did not decrease the tested properties.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 25-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modification of Foundry Binders by Biodegradable Material
    Autorzy:
    Major-Gabryś, K.
    Grabarczyk, A.
    Dobosz, S. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380402.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environmental protection
    innovative foundry material
    phenol-furfuryl resin
    hydrated sodium silicate
    biodegradable material
    ochrona środowiska
    innowacyjny materiał odlewniczy
    uwodniony krzemian sodu
    materiał biodegradowalny
    Opis:
    The paper presents the impact of biodegradable material - polycaprolactone (PCL) on selected properties of moulding sands. A self-hardening moulding sands with phenol-furfuryl resin, which is widely used in foundry practice, and an environmentally friendly self-hardening moulding sand with hydrated sodium silicate where chosen for testing. The purpose of the new additive in the case of synthetic resin moulding sands is to reduce their harmfulness to the environment and to increase their “elasticity” at ambient temperature. In the case of moulding sands with environmentally friendly hydrated sodium silicate binder, the task of the new additive is to increase the elasticity of the tested samples while preserving their ecological character. Studies have shown that the use of 5% PCL in moulding sand increases their flexibility at ambient temperature, both with organic and inorganic binders. The influence of the new additive on the deformation of the moulding sands at elevated temperatures has also been demonstrated.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 31-34
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Quartz Sand Quality on Bending Strength and Thermal Deformation of Moulding Sands with Synthetic Binders
    Autorzy:
    Dobosz, S. M.
    Grabarczyk, A.
    Major-Gabryś, K.
    Jakubski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380092.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    quartz sand
    moulding sand
    synthetic resin
    hot distortion
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    piasek kwarcowy
    masa formierska
    żywica syntetyczna
    Opis:
    Modern techniques of castings production, including moulding sands production, require a strict technological regime and high quality materials. In the case of self-hardening moulding sands with synthetic binders those requirements apply mainly to sand, which adds to more than 98% of the whole moulding sand mixture. The factors that affect the quality of the moulding sands are both chemical (SiO2, Fe2O3 and carbonates content) and physical. Among these factors somewhat less attention is paid to the granulometric composition of the sands. As a part of this study, the effect of sand quality on bending strength Rgu and thermal deformation of self-hardening moulding sands with furfural and alkyd resin was assessed. Moulding sands with furfural resin are known [1] to be the most susceptible to the sand quality. A negative effect on its properties has, among others, high content of clay binder and so-called subgrains (fraction smaller than 0,1mm), which can lead to neutralization of acidic hardeners (in the case of moulding sands with furfuryl resin) and also increase the specific surface, what forces greater amount of binding agents. The research used 5 different quartz sands originating from different sources and characterized with different grain composition and different clay binder content.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2; 9-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Moulding Sand with Inorganic Cordis Binder for Ablation Casting
    Autorzy:
    Hosadyna-Kondracka, M.
    Major-Gabryś, K.
    Kamińska, J.
    Grabarczyk, A.
    Angrecki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382039.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    ablation casting
    moulding sand
    inorganic binder
    thermal curing
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    odlewanie ablacyjne
    masa formierska
    spoiwo nieorganiczne
    utwardzanie termiczne
    Opis:
    The essence of ablation casting technology consists in pouring castings in single-use moulds made from the mixture of sand and a water-soluble binder. After pouring the mould with liquid metal, while the casting is still solidifying, the mould destruction (washing out, erosion) takes place using a stream of cooling medium, which in this case is water. This paper focuses on the selection of moulding sands with hydrated sodium silicate for moulds used in the ablation casting. The research is based on the use of Cordis binder produced by the Hüttenes-Albertus Company. It is a new-generation inorganic binder based on hydrated sodium silicate. Its hardening takes place under the effect of high temperature. As part of the research, loose moulding mixtures based on the silica sand with different content of Cordis binder and special Anorgit additive were prepared. The reference material was sand mixture without the additive. The review of literature data and the results of own studies have shown that moulding sand with hydrated sodium silicate hardened by dehydration is characterized by sufficient strength properties to be used in the ablation casting process. Additionally, at the Foundry Research Institute in Krakow, preliminary semi-industrial tests were carried out on the use of Cordis sand technology in the manufacture of moulds for ablation casting. The possibility to use these sand mixtures has been confirmed in terms of both casting surface quality and sand reclamation.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 110-115
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical and Thermal Deformation of Hot-box Moulding Sands
    Autorzy:
    Grabarczyk, A.
    Major-Gabryś, K.
    Dobosz, S. M.
    Jakubski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381390.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry material
    innovative foundry technology
    mechanical properties
    moulding sand deformation
    hot distortion
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    właściwości mechaniczne
    odkształcenie masy formierskiej
    deformacja cieplna
    Opis:
    The constantly developing and the broadly understood automation of production processes in foundry industry, creates both new working conditions - better working standards, faster and more accurate production - and new demands for previously used materials as well as opportunities to generate new foundry defects. Those high requirements create the need to develop further the existing elements of the casting production process. This work focuses on mechanical and thermal deformation of moulding sands prepared in hot-box technology. Moulding sands hardened in different time periods were tested immediately after hardening and after cooling. The obtained results showed that hardening time period in the range 30-120 sec does not influence the mechanical deformation of tested moulding sands significantly. Hot distortion tests proved that moulding sands prepared in hot-box technology can be characterized with stable thermal deformation up to the temperature of circa 320 °C.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 55-58
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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