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    Tytuł:
    Effect of the Type of Inorganic Binder on the Properties of Microwave-Hardened Moulding Sands for Ablation Casting Technology
    Autorzy:
    Puzio, S.
    Kamińska, J.
    Angrecki, M.
    Major-Gabryś, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/353306.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative technologies
    ablation casting
    moulding sands
    microwave hardening
    environmentally friendly inorganic binders
    Opis:
    The aim of this study is to demonstrate the possibility of using moulding sands based on inorganic binders hardened in a microwave chamber in the technology of ablation casting of aluminium alloys. The essence of the ablation casting technology consists in this that a mould with a water-soluble binder is continuously washed with water immediately after being poured with liquid alloy until its complete erosion takes place. The application of an environmentally friendly inorganic binder improves the ecology of the whole process, while microwave hardening of moulding sands allows moulds to be made from the sand mixture containing only a small amount of binder. The studies described in this article included microwave-hardened sand mixtures containing the addition of selected inorganic binders available on the market. The strength of the sands with selected binders added in an amount of 1.0; 1.5 and 2.0 parts by mass was tested. As a next step, the sand mixtures with the strength optimal for ablation casting technology, i.e. about 1.5 MPa, were selected and tested for the gas forming tendency. In the four selected sand mixtures, changes occurring in the samples during heating were traced. Tests also included mould response to the destructive effect of ablation medium, which consisted in the measurement of time necessary for moulds to disintegrate while washed with water. Tests have shown the possibility of using environmentally friendly, microwave-hardened moulding sands in ablation casting of aluminium alloys.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 4; 1385-1390
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The thermal and structural analysis of new bicomponent binders for moulding sands consisting of furfuryl resin and polycaprolactone (PCL)
    Autorzy:
    Major-Gabryś, K.
    Bobrowski, A.
    Grabarczyk, A.
    Dobosz, S. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/355246.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies and materials
    moulding sands
    furfuryl resin
    polycaprolactone
    spectroscopic studies
    PCL
    FTIR
    Opis:
    The aim of the article is thermal and structural analysis of new two-component binders for foundry moulding sands. The previous research showed the possibility of using biodegradable materials as binders or parts of binders’ compositions for foundry moulding and core sands. This paper is concentrated on estimating the influence of PCL on phenol-furfuryl resin thermal destruction (measured by derivatographic research) and its structure (measured by FTiR technology). The research proved that addition of new biodegradable additive PCL in the amount of 5-15% to the phenol-furfuryl resin doesn’t change the resin thermal destruction course but it results in appearance of a new band in two-component binder structure. What’s more there has been noticed a growth of intensity for band at wavenumber 1730 cm-1 (C = O) with the increasing addition of PCL.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 369-372
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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:
    The Tendency of Moulding Sands to Generate Core Cracks
    Autorzy:
    Grabarczyk, A.
    Dobosz, S. M.
    Kusiński, J.
    Major-Gabryś, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/380432.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative foundry materials
    moulding sand
    binder
    elasticity
    cracking
    innowacyjne technologie odlewnicze
    innowacyjne materiały odlewnicze
    masa formierska
    spoiwo
    Opis:
    The constant growth of foundry modernization, mechanization and automation is followed with growing requirements for the quality and parameters of both moulding and core sands. Due to this changes it is necessary to widen the requirements for the parameters used for their quality evaluation by widening the testing of the moulding and core sands with the measurement of their resistance to mechanical deformation (further called elasticity). Following article covers measurements of this parameter in chosen moulding and core sands with different types of binders. It focuses on the differences in elasticity, bending strength and type of bond destruction (adhesive/cohesive) between different mixtures, and its connection to the applied bonding agent. Moulding and cores sands on which the most focus is placed on are primarily the self-hardening moulding sands with organic and inorganic binders, belonging to the group of universal applications (used as both moulding and core sands) and mixtures used in cold-box technology.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 1; 157-161
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elasticity of Moulding Sands – a Method of Reducing Core Cracking
    Autorzy:
    Dobosz, S. M.
    Grabarczyk, A.
    Major-Gabryś, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/380966.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative foundry materials
    moulding sand
    binder
    elasticity
    cracking
    innowacyjne technologie odlewnicze
    innowacyjne materiały
    piasek formierski
    spoiwo
    elastyczność
    Opis:
    This paper focuses on mechanical properties of self hardening moulding sands with furfuryl and alkyd binders. Elasticity as a new parameter of moulding sands is investigated. With the use of presented testing equipment it is possible to determine force kinetics and deformation of moulding sand in real time. The need for this kind of study comes from the modern casting industry. New foundries can be characterized with high intensity of production which is correlated with high level of mechanization and automatization of foundry processes. The increasingly common use of manipulators in production of moulds and cores can lead to generation of new types of flaws, caused by breakage in moulds and cores which could occur during mould assembly. Hence it is required that moulds and cores have high resistance to those kinds of factors, attributing it with the phenomenon of elasticity. The article describes the theoretical basis of this property, presents methods of measuring and continues earlier research.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 1; 31-36
    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
    Tytuł:
    Wpływ dodatku materiału biodegradowalnego jako komponentu dwuskładnikowego spoiwa odlewniczych mas formierskich i rdzeniowych na właściwości spoiwa oraz mas z jego zastosowaniem
    Effect of a biodegradable addition as a binary binder component for cast moulding and core sands on the properties of the binder and the sands
    Autorzy:
    Major-Gabryś, K.
    Grabarczyk, A.
    Dobosz, S. M.
    Drożyński, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/391842.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
    Tematy:
    ochrona środowiska
    innowacyjne materiały i technologie odlewnicze
    masy formierskie
    spoiwa
    żywica furfurylowa
    materiał biodegradowalny
    environment protection
    innovative casting materials and technologies
    moulding sands
    binders
    furfuryl resin
    biodegradable material
    Opis:
    Rosnące wymagania dotyczące emisji substancji szkodliwych zmuszają przemysł odlewniczy do poszukiwania nowych, bardziej przyjaznych dla środowiska rozwiązań. Do rozwiązań takich mogą należeć: technologie sporządzania mas formierskich i rdzeniowych z zastosowaniem organicznych materiałów biodegradowalnych jako spoiw. Należy jednak pamiętać, że nowe technologie muszą zapewnić wysokie właściwości technologiczne mas formierskich i rdzeniowych. W niniejszym artykule przedstawiono wyniki badań nowych dwuskładnikowych spoiw formierskich, w których część powszechnie stosowanej w praktyce odlewniczej żywicy fenolowo-furfurylowej zastąpiono materiałem biodegradowalnym w postaci polikaprolaktonu (PCL). W artykule przedstawiono badania wpływu materiału biodegradowalnego jako komponentu nowego dwuskładnikowego spoiwa na degradację termiczną spoiwa, jego lepkość oraz na wybrane właściwości technologiczne badanych mas z zastosowaniem nowego spoiwa, w tym ich deformację cieplną oraz elastyczność w temperaturze otoczenia. Przeprowadzone badania wykazały, że zastąpienie w spoiwie części żywicy fenolowo-furfurylowej materiałem biodegradowalnym PCL nie wpływa na degradację termiczną nowego spoiwa, zwiększa natomiast jego lepkość. Masy z zastosowaniem dwuskładnikowego spoiwa charakteryzują się zbliżonymi właściwościami technologicznymi do mas zawierających tylko żywicą fenolowo-furfurylową.
    The increasing requirements concerning the emission of hazardous substances force the casting industry to search for new, more environment-friendly solutions. Such solutions may include technologies of developing moulding and core sands with the use of organic biodegradable materials as binders. We should, however, remember that the new technologies must ensure high technological properties of the moulding and core sands. This article presents the results of investigations of new binary moulding binders, where part of the phenol-furfuryl resin commonly applied in casting, was replaced by a biodegradable material in the form of polycaprolactone (PCL). The article discusses the investigations of the effect of the biodegradable material as a component of a new binary binder on the thermal degradation of the binder, its viscosity as well as the selected technological properties of the examined moulding sands, including their thermal deformation and elasticity at ambient temperature. The performed examinations showed that replacing a part of the phenol- furfuryl resin in the binder with the PCL biodegradable material does not affect the thermal degradation of the new binder, while increasing its viscosity. The moulding mixtures with the applied binary binder are characterized by similar technological properties to the moulding sands with the phenol-furfuryl resin only.
    Źródło:
    Prace Instytutu Odlewnictwa; 2016, 56, 4; 391-399
    1899-2439
    Pojawia się w:
    Prace Instytutu Odlewnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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