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    Wyświetlanie 1-14 z 14
    Tytuł:
    Development of method for identification of compounds emitted during thermal degradation of binders used in foundry
    Autorzy:
    Kubecki, M.
    Holtzer, M.
    Grabowska, B.
    Bobrowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382510.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry binder
    furan resin
    gas chromatography
    mass spectrometry
    spoiwo odlewnicze
    żywica furanowa
    chromatografia gazowa
    spektrometria masy
    Opis:
    The aim of the research was to develop a method for identification of compounds emitted during thermal degradation of binders used in foundry. Research were performed with the use of Certified Reference Materials mixtures of semi-volatiles compounds with furfuryl alcohol and aldehyde. Furfuryl-urea resin samples were also used. Station for thermal degradation of materials used in foundry was designed and made. Thermal degradation process conditions and gas chromatograph coupled with high resolution mass spectrometry operating conditions were established. Organic compounds emitted during degradation were identified. The paper briefly represents the range of study and the results obtained for furfuryl-urea resin thermal degradation. Significant information about volatile and semi-volatile organic compounds emitted in different temperatures is also discussed.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 125-130
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of reclamability of molding sands with new inorganic binders
    Autorzy:
    Izdebska-Szanda, I.
    Baliński, A.
    Angrecki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382753.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    spoiwo nieorganiczne
    wytrzymałość
    innovative foundry material
    innovative foundry technologies
    inorganic binders
    reclamation
    reclamability
    strength
    Opis:
    One of the purposes of the application of chemically modified inorganic binders is to improve knocking out properties and the related reclamability with previously used in foundry inorganic binder (water glass), which allowing the use of ecological binders for casting nonferrous metals. Good knocking out properties of the sands is directly related to the waste sands reclamability, which is a necessary condition of effective waste management. Reclamation of moulding and core sands is a fundamental and effective way to manage waste on site at the foundry, in accordance with the Environmental Guidelines. Therefore, studies of reclamation of waste moulding and core sands with new types of inorganic binders (developed within the framework of the project) were carried out. These studies allowed to determine the degree of recovery of useful, material, what the reclaimed sand is, and the degree of its use in the production process. The article presents these results of investigation. They are a part of broader research programme executed under the project POIG.01.01.02-00-015/09 'Advanced materials and technologies'.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2; 35-40
    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:
    Application of microwaves for binder content assessment in moulding sands
    Autorzy:
    Nowak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/380212.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne technologie odlewnicze
    masa formierska
    spoiwo
    mikrofale
    innovative foundry technologies
    moulding sand
    binder
    microwaves
    Opis:
    The paper presents results of preliminary examinations on possibility of determining binder content in traditional moulding sands with the microwave method. The presented measurements were carried-out using a special stand, the so-called slot line. Binder content in the sandmix was determined by measurements of absorption damping Ad and insertion losses IL of electromagnetic wave. One of main advantages of the suggested new method of binder content measurement is short measuring time.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 3; 83-86
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies on the renewability of polymeric binders for foundry
    Autorzy:
    Grabowska, B.
    Kaczmarska, K.
    Bobrowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380277.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    masa formierska
    spoiwo polimerowe
    sieciowanie
    innovative foundry materials
    innovative foundry technologies
    moulding sand
    polymeric binders
    crosslinking
    renewability
    Opis:
    In this paper the results of studies of polymeric binders on the example of the new BioCo2 binder, including the problem of its renewability, are presented. The results of structural studies (FT-IR) for the BioCo2 binder before and after crosslinking, and bending strength tests Rgu fresh and renewed cured molding sands with BioCo2 binder are discussed. The cross-linking binder and curring of moulding sand was carried out by physical agents (microwave radiation, temperature). On the basis of obtained results was shown that it is possible to restore the initial properties of the adhesive of BioCo2 binder. The initial properties of moulding sand can be achieved, after the cross-linking binders and after curing in the moulding sands with bioCo2 binder , by supplementing the moulding sand composition by the appropriate amount of water.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 3; 37-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Moulding sands with new inorganic binders - ecology assessment in the aspect of work environment
    Autorzy:
    Szanda, I.
    Żmudzińska, M.
    Faber, J.
    Perszewska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/380365.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne materiały odlewnicze
    innowacyjne technologie odlewnicze
    odlewnictwo
    masa formierska
    spoiwo nieorganiczne
    środowisko pracy
    innovative foundry materials
    innovative foundry technologies
    casting
    moulding sand
    inorganic binders
    work environment
    Opis:
    The development of economy and industry introducing new technologies and materials often means the increased threat of occurrence of factors harmful to humans and environment. Workers employed in foundries as mould pourers are the group of high professional risk. Foundry moulding sands when poured with liquid metal are a source of the emission of harmful, toxic and carcinogenic (benzene, PAHs) compounds. The paper presents the results of studies on the concentration of chemical compounds emitted in the process of casting aluminium alloy and brass using moulding sands with the new inorganic binders. The specific values of the exposure indices were compared with the limit values. This enabled an assessment of the impact of moulding sands on work environment. The obtained results were compared with the values of contaminants emitted when pouring foundry moulds made from furan sands and bentonite sands with an addition of coal dust.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 3; 117-122
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of Hardening Methods on the Moulding Sand’s Properties with Gypsum Binder
    Autorzy:
    Granat, K.
    Paduchowicz, P.
    Dziedzic, A.
    Jamka, M.
    Biały, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1840922.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry
    gypsum binder
    foundry masses
    core mass
    masses properties
    odlewnia
    spoiwo gipsowe
    masy odlewnicze
    masa rdzeniowa
    właściwości masy
    Opis:
    The research paper presents the results of testing the strength and technological properties of molding sand with gypsum binder, the bonding process proceeded: naturally or conventionally. The tests included mass containing (parts by weight): 78 pbw. Grudzeń-Las quartz sand, 22 pbw. plaster gypsum "Dolina Nidy” and 9 pbw. water. Measurements of compressive strength, shear, tensile and bending as well as permeability and looseness were carried out on standard cylindrical samples kept in the air for 1-96 hours or dried at 110oC for 1-8 hours. The results of the analysis were analyzed in connection with the mass structure and construction binding bridges warp grains observed with a scanning microscope (SEM). The influence of drying intensity on the bonding process and related mass properties has been demonstrated, especially from the point of view of the possibility of selection and / or intensification of a specific curing method for use in the production of gypsum binger molds and cores.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 4; 13-17
    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
    Tytuł:
    Analiza wybranych właściwości utwardzanych mikrofalowo mas formierskich wiązanych spoiwami na bazie skrobi
    Analysis of the Selected Properties of Microwave-Cured Moulding Sands with Starch-Based Binders
    Autorzy:
    Kaczmarska, K.
    Grabowska, B.
    Drożyński, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/380756.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nowoczesne materiały odlewnicze
    spoiwo skrobiowe
    skrobia natywna
    właściwości mas formierskich
    modern casting materials
    adhesive starch
    native starch
    mouldings properties
    Opis:
    Celem przeprowadzonych badań było określenie wybranych właściwości utwardzonych mikrofalowo mas formierskich ze spoiwami na bazie skrobi. Efektywność wiązania ziaren osnowy określono w oparciu o wyniki oznaczenia płynności, przepuszczalności, ścieralności oraz wytrzymałości na zginanie i rozciąganie masy utwardzonej. Dokonano wstępnej oceny zasadności mikrofalowego utwardzania mas formierskich zawierających samodzielne spoiwa skrobiowe w postaci natywnej skrobi ziemniaczanej Superior Standard oraz komercyjnego produktu Albertine F/1.
    The aim of the study was to determine the properties of the moulding sands with binders consist of starch. The efficiency of binding of the sand grains was determined based on the results of the determination of liquidity, permeability, abrasion resistance and flexural strength and tensile strength of the microwave-cured moulding sands. There was made a preliminary assessment of the merits of microwave curing prepared moulding with a binder in the form of a native potato starch as Superior Standard and commercial product as Albertine F/1.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4 spec.; 51-54
    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:
    Research on Assessment of the Applicability of Malted Barley Binder in Moulding Sand Technology
    Autorzy:
    Samociuk, B.
    Gal, B.
    Nowak, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079587.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative materials
    mechanical properties
    moulding sand
    organic binder
    innowacyjne technologie odlewnicze
    innowacyjne materiały
    właściwości mechaniczne
    masa formierska
    spoiwo organiczne
    Opis:
    The foundry industry is looking for solutions that improve the quality of the finished product and solutions that reduce the negative impact of the industry on the natural environment [26]. This process leads to work on the use of new or previously unused materials for binders. Organic and inorganic foundry binders are replaced by renewable materials of plant origin to meet the requirements of both the foundry customers and the environmental and health and safety regulations. The aim of this work was to identify the applicability of renewable and organic malted barley binder in moulding sand technology. The influence of the malt binder content on dry tensile strength, dry bending strength, dry permeability, dry wear resistance and flowability were evaluated. The results show that the malted barley binder can be self contained material binding the high-silica sand grains. Selected mechanical properties of moulding sands were found to increase with an increase in binder content. It was observed that malted barley binder creates smooth bonding bridges between high-silica sand grains.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 74-80
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Odpadowa masa formierska jako substytut kruszywa w procesie wytwarzania autoklawizowanego betonu komórkowego
    Waste moulding sand as a substitute aggregate in the manufacture of autoclaved cellular concrete
    Autorzy:
    Angrecki, M.
    Izdebska-Szanda, I.
    Palma, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/391375.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
    Tematy:
    zużyte masy odlewnicze
    utylizacja mas formierskich
    beton komórkowy
    spoiwa krzemianowe
    spoiwo geopolimerowe
    waste moulding sands
    utilization of moulding sands
    cellular concrete
    silicate binders
    geopolymer binders
    Opis:
    W artykule przedstawiono wyniki badań dotyczących możliwości wykorzystania odpadowych mas formierskich ze spoiwami krzemianowymi i geopolimerowymi do wytwarzania autoklawizowanego betonu komórkowego. Duża zawartość krzemionki w zużytych masach formierskich i rdzeniowych jest czynnikiem przemawiającym za przyjęciem takiego rozwiązania technologicznego. Koncepcja pracy obejmowała wykonanie serii mieszanek betonowych, zawierających w swoim składzie odpadową masę formierską, która była wprowadzana do podstawowej mieszaniny surowcowej na zasadzie stopniowej substytucji piasku kwarcowego. Ocenę możliwości utylizacji odpadowych mas odlewniczych przeprowadzono na postawie analizy porównawczej, obejmującej podstawowe właściwości technologiczne dwóch rodzajów materiałów, betonu komórkowego podstawowego, który zawierał w składzie tylko piasek kwarcowy „świeży” oraz betonu komórkowego eksperymentalnego, w którym piasek kwarcowy świeży zastępowano zużytą masą formierską.
    The article presents the results of research on the possibilities of utilizing waste moulding sands with silicate and geopolymer binders in the production of autoclaved cellular concrete. The high content of silica in the waste moulding and core sands is a factor in favour of this technological solution. The general idea of the study was to make a series of concrete mixes, which would contain in their composition waste moulding sands, which was then introduced to the basic raw material mixture on the principle of gradually increasing the substitute of fresh silica sand. The possibility of utilization of the waste moulding sand was evaluated based on the results of comparative analysis, covering the main technological properties of the two types of materials, i.e. the base cellular concrete composed of “fresh” silica sand only, and experimental cellular concrete, where fresh silica sand was replaced in different proportions with waste moulding sand.
    Źródło:
    Prace Instytutu Odlewnictwa; 2015, T. 55, nr 3, 3; 15-22
    1899-2439
    Pojawia się w:
    Prace Instytutu Odlewnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinetics of hardening and drying of ceramic moulds with the new generation binder – colloidal silica
    Autorzy:
    Zych, J.
    Kolczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381420.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative foundry materials
    colloidal binder
    investment casting
    drying rate
    technological factor
    innowacyjna technologia odlewnicza
    innowacyjne materiały odlewnicze
    spoiwo koloidalne
    szybkość suszenia
    czynnik technologiczny
    Opis:
    The influence of selected factors on drying ceramic moulds applied in the investment casting technology was determined by the gravimetric method. Moulds produced of ceramic sands based on the new generation binders – colloidal silica, were investigated. It was found that each successive layer, of a similar thickness, is drying longer than the previous one. The drying time of layers forming closed spaces is several times longer as compared with drying open surfaces (external). Grain size of matrix used for moulds sprinkling has none significant influence on drying rates.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 4; 112-116
    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 1-14 z 14

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