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    Tytuł:
    Aspects of Quality Assurance in Mechanization of Core Making Process
    Autorzy:
    Asłanowicz, M.
    Fedoryszyn, A.
    Fulko, T.
    Ościłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380486.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanization of casting processes
    automation of casting processes
    sand technologies
    core shooting
    blowing machines
    core making process
    mechanizacja procesów odlewniczych
    automatyzacja procesów odlewniczych
    rdzeń wstrzeliwany
    wdmuchiwanie
    Opis:
    The article presents conclusions drawn from analysis and research conducted in domestic foundries concerning currently used core shop equipment as well as determination of their needs within this area. Works within mechanization of core making process, conducted together by Ferro-Masz company, Łódź and Faculty of Foundry Engineering of AGH, Kraków, included analysis of available technologies, applied materials and requirements for mechanization of core making process with the use of blowing methods. Commercial offers from manufacturers of core making systems has been discussed together with presentation of own solution of universal core shooting/blowing machine, ensuring production of high-quality cores.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 43-46
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dielectric Properties of High-Silica Sand at 2.45 GHz
    Autorzy:
    Opyd, B
    Nowak, D.
    Granat, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382869.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    microwaves
    moulding sand
    high-silica sand
    innowacyjne technologie odlewnicze
    mikrofale
    masa formierska
    piasek kwarcowy
    Opis:
    In the paper, presented are measurements of permittivity (εr) and dielectric loss factor (tgδ) of high-silica moulding sand, determined at 2.45 GHz by perturbation method on a stand of waveguide resonance cavity. Determined were electrical properties of the main component of moulding sands, i.e. high-silica base, critical for their heating kinetics. The measurements were carried-out for six kinds of high-silica sand with diverse grain size distribution. Analysis of the results indicates that both permittivity and loss tangent values are similar for all kinds of high-silica moulding sand. Irrespective of their grain size analysis, neither of the examined sandmixes shows susceptibility to action of 2.45 GHz microwave field. The presented results make a ground for developing a mathematical model of microwave heating of technological systems composed of moulding sand and foundry tooling.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 136-139
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Innovative microwave hardening of water-glass containing sandmixes in technical-economic approach
    Autorzy:
    Małachowska, A.
    Stachowicz, M.
    Granat, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382448.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne technologie odlewnicze
    mikrofale
    szkło wodne
    masa formierska
    masa rdzeniowa
    innovative foundry technologies
    microwave hardening
    water glass
    moulding sand
    core sand
    Opis:
    In recent years, observed is increasing interest in sandmixes containing inorganic binders. These binders, including also water-glass, are harmless for the environment, neutral for humans and relatively cheap. In spite of numerous advantages, their wide application is restricted by poor knock-out properties and problems related to rebonding. Therefore, numerous researches aimed at eliminating disadvantages of water-glass binder are directed, among others, to modifying structure of hydrated sodium silicate or to applying new hardening techniques. The innovative method of rapid hardening by microwave heating, that permits restricting quantity of used binder and thus improving knock-out properties, meets expectations of present-day foundries. In this paper, compiled is available information on microwave hardening of water-glass containing sandmixes, as well as costs of practical application of this technology are evaluated on the ground of own research.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1; 75-80
    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:
    Metody poprawy jakości ekologicznych mas formierskich ze szkłem wodnym
    Methods of Quality Improvements of Ecological Moulding Sands with Water Glass
    Autorzy:
    Kmita, A.
    Hutera, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/381917.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne materiały
    ekologia
    nowoczesne technologie
    nanocząstki
    masa formierska
    innovative materials
    ecology
    modern technologies
    nanoparticles
    molding sand
    Opis:
    Masy formierskie ze szkłem wodnym mają szereg charakterystycznych cech, wynikających bezpośrednio z właściwości szkła wodnego. Niewątpliwą zaletą tych mas jest fakt, iż są one ekologiczne, a spoiwo jest tanie i łatwo dostępne. Natomiast w świetle właściwości technologicznych wykazują pewne wady, które ograniczają ich szerokie wykorzystanie w odlewnictwie. Ich ujemną cechą jest mała wytrzymałość w pierwszej fazie utwardzania; proces utwardzania nie przebiega „do końca” i jest ponowie uaktywniany po zalaniu formy ciekłym stopem. Efektem tego jest zwiększenie wytrzymałości masy co jest przyczyną złej wybijalności mas z tym spoiwem. Wykazują one również małą podatność do regeneracji. Dlatego też poszukuje się sposobów wyeliminowania lub ograniczenia tych wad. W artykule przedstawiono metody poprawy jakości mas formierskich ze szkłem wodnym. Procesy te, w uproszczeniu, mogą przebiegać na drodze: modyfikacji składu osnowy masy formierskiej, sposobu jej utwardzania lub modyfikacji samego spoiwa. W metodach tych wykorzystywane są często najnowsze techniki oraz materiały nowej generacji.
    Moulding sands with water glass have several characteristic properties, resulting directly from the water glass properties. An undoubted good point of these moulding sands is the fact, that they are ecological and their binder is cheap and easily obtainable. However their technological properties indicate certain failures, which limit their wider application in foundry engineering. Their negative property is low strength in the first phase of hardening; their hardening process is not ‘fully finished’ and is reactivated after the mould pouring with liquid alloy. In effect the increased moulding sand strength is the reason of bad knocking out of moulding sands with this binder. They are also not easily susceptible to the reclamation treatment. Therefore, ways of eliminating or limiting of these faults are looked for. Some methods of improving the quality of moulding sands with water glass are presented in the paper. These processes, in simplification, can concern: modifications of moulding sand matrices, methods of their hardening or modifications of a binder itself. The most modern techniques and materials of the new generation are often applied in these methods.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2 spec.; 45-50
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    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 Influence of Microwave Drying Parameters on the Properties of Synthetic Moulding Sands
    Autorzy:
    Nowak, D.
    Gal, B.
    Włodarska, A.
    Granat, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/381434.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    drying
    moulding sand
    strength properties
    permeability
    innowacyjne technologie odlewnicze
    suszenie mikrofalowe
    piasek formierski
    właściwości wytrzymałościowe
    przepuszczalność
    Opis:
    In this work, the influence of microwave drying parameters such as irradiation time and microwave power level on the properties of synthetic moulding sands is presented. Determination of compressive strength Rcs, shear strength Rts and permeability Ps of synthetic moulding sands with the addition of two different bentonites, after drying process with variable microwave parameters were made. The research works were carried out using the microwave oven with regulated power range of the electromagnetic field. From the results obtained, the significant influence of both drying time and microwave power level on the selected properties of moulding sands was observed. In comparison to the conventional drying method, microwave drying allows to obtain higher compressive strength of the synthetic moulding sand. The influence of application microwave irradiation on permeability was not observed. Higher strength characteristics and shorter drying time are major advantages of application of the electromagnetic irradiation for drying of the synthetic moulding sand with regard to conventional drying method.
    Źródło:
    Archives of Foundry Engineering; 2019, 4; 51-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Sand Fluidization on Structure and Properties of Aluminum Lost Foam Casting
    Autorzy:
    Kaliuzhnyi, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/380477.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    lost foam casting
    aluminum alloy
    sand fluidization
    innowacyjne technologie odlewnicze
    metoda traconej piany
    stop aluminium
    fluidyzacja
    Opis:
    The article presents investigation results of the effect of sand fluidization on the structure and mechanical properties of AlSi9 aluminum alloy. Castings were made by lost foam casting process with sand fluidization in mold at the stages of their solidification and cooling. Sand fluidization was achieved by blowing sand bed with compressed air in a foundry container. The metallographic study was carrying out on samples cut from different sections of the castings. Mechanical properties were determined on specimens made from cast samples. Microstructural analysis showed that sand fluidization increases the cooling rate, as a result, the main microstructural components of the alloy – SDAS, eutectic silicon and needles of the rich-iron phase – decrease. Moreover, in different sections of the casting structure is more uniform. With an increasing the air flow rate, a greater refinement of the structure is observed. Through the use of sand fluidization, the mechanical properties of LFC aluminum alloys increase to the level of gravity die castings.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 1; 122-126
    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:
    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:
    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:
    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:
    Zastosowanie PLA jako spoiwa w masach formierskich i rdzeniowych
    Application of PLA as a Binder in Molding and Core Sands
    Autorzy:
    Kozłowski, J.
    Kochański, A.
    Perzyk, M.
    Tryznowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381798.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    materiały innowacyjne
    innowacyjne technologie odlewnicze
    biopolimery
    spoiwa
    piasek otaczany
    metoda HOT-BOX
    innovative materials
    innovative foundry technologies
    polymers
    binder
    sand surrounded
    HOT-BOX method
    Opis:
    Rosnąca popularność polimerów biodegradowalnych, możliwości ich wytwarzania, przetwarzania i wykorzystania, stwarzają szansę opracowania nowych materiałów wiążących, do zastosowania w przemyśle odlewniczym. Nowe spoiwa biopolimerowe, spełniające wymagania z zakresu ochrony środowiska, mogą stanowić alternatywę dla dotychczas stosowanych spoiw do mas formierskich i rdzeniowych, w przypadku uzyskania wymaganych właściwości wytrzymałościowych i technologicznych. Prezentowane rozwiązanie, alternatywne do dotychczas opisywanych w literaturze, obejmujące badania mas otrzymywanych z piasków otaczanych spoiwem biodegradowanlym PLA, dotyczy optymalizacji właściwości wytrzymałościowych, w odniesieniu do procentowej zawartości biopolimeru, temperatury i czasu wytwarzania form i rdzeni metodą HOT-BOX. Uzyskane wyniki pozwalają sądzić, że biopolimery mogą być skutecznym zamiennikiem dotychczas stosowanych spoiw mas formierskich i rdzeniowych, a metoda wytwarzania z użyciem piasków otaczanych, może być równie skuteczna jak metody alternatywne.
    Currently moulding sand with biopolymers as a binding agent appears to be probably the most interesting achievement in the mould production from ecology point of view. New biopolymer materials offer the parameters comparable to those which have been in use up to now. Moulding sands with a biopolymer binder were produced. The moulding process of 2% PLA sandmix involving different fusion temperatures and times was studied and the results presented. The results of observations and ultimate tensile strength tests were offered. The obtained results point to the fact that the new sandmix moulding method offered similar results that obtained in the literature. The issue is viewed as requiring further research.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2 spec.; 51-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Various Matrixes on the Strength Properties of Moulding Sands with Thermally Hardened Hydrated Sodium Silicate for the Ablation Casting Process
    Autorzy:
    Major-Gabryś, Katarzyna
    Puzio, Sabina
    Bryłka, Agata
    Kamińska, Jadwiga
    Powiązania:
    https://bibliotekanauki.pl/articles/2056023.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    innovative foundry technologies and materials
    moulding sand
    ablation casting
    water glass
    thermal curing
    innowacyjne technologie
    materiały odlewnicze
    piasek formierski
    odlewanie ablacyjne
    szkło wodne
    utwardzanie termiczne
    Opis:
    The essence of ablation casting technology consists in pouring castings into single-use moulds made from the mixture of sand and a water-soluble binder. After pouring the mould with liquid metal yet 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 ablation casting. The research is based on the use of water glass 145 and 150 as binders. As part of the research, loose moulding mixtures based on two silica sands from different sand mines with different content of binders were prepared. 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. Our own research also confirmed the possibility of using these sand mixtures in terms of both casting surface quality and sand reclamation. The results presented in this paper prove that both sand grains and types of binder tested may be used as components in moulding sands devoted to ablation casting.
    Źródło:
    Journal of Casting & Materials Engineering; 2021, 5, 2; 31--35
    2543-9901
    Pojawia się w:
    Journal of Casting & Materials Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of Binding Kinetics and Choice of Self-Hardening Moulding and Core Sands Used for Casting Massive Parts for Wind Power Industry under the Conditions of Krakodlew Foundry
    Autorzy:
    Rączka, M.
    Isendorf, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/382470.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wind energy
    innovative materials
    innovative casting technologies
    environmental protection
    ductile iron
    moulding sand
    energia wiatrowa
    innowacyjne materiały
    innowacyjna technologia odlewania
    ochrona środowiska
    żeliwo
    masy formierskie
    Opis:
    In highly developed countries, a significant progress in the use of alternative and clean energy sources has recently been observed. The European Union has implemented a programme to build wind turbines. It is estimated that in the coming years, thanks to the support in tax and credit, the global energy will develop very intensively. Many components of the wind turbines are castings. The basic material used for these castings is ductile iron, which in this particular case must meet high requirements imposed by the operating conditions of wind turbines. Anticipating an increase in customer demand for this type of castings, Krakodlew SA has decided to modernize its foundry using the ability to obtain external financing. The ductile iron manufacturing technology is now being developed and adapted to the specific conditions of the foundry plant, including the melting process yielding cast material with the required chemical composition, the technology of moulding, and the conditions for possible secondary metallurgy, spheroidizing treatment and graphitizing inoculation. The fulfilment of the imposed conditions for the casting production demands the use of advanced casting technologies introduced to the manufacturing process. The development of technology to launch the production of ductile iron castings for the wind power industry was supported by The National Centre for Research and Development (NCBiR). This article presents part of research on the binding kinetics of furan resin sands and choice of their composition for moulds and cores to make heavy castings used as components of equipment for the wind power industry.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 2; 222-226
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermally Hardened Moulding and Core Sands with Hydrated Sodium Silicate Designed for Al Alloy Castings
    Autorzy:
    Major-Gabryś, K. A.
    Grabarczyk, A. P.
    Dobosz, S. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/379661.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative foundry materials
    moulding sand
    hydrated sodium silicate
    thermal hardening
    innowacyjne technologie odlewnicze
    innowacyjne materiały odlewnicze
    masa formierskia
    krzemian sodu
    hartowanie termiczne
    Opis:
    The necessity of obtaining high quality castings forces both researchers and producers to undertake research in the field of moulding sands. The key is to obtain moulding and core sands which will ensure relevant technological parameters along with high environmental standards. The most important group in this research constitutes of moulding sands with hydrated sodium silicate. The aim of the article is to propose optimized parameters of hardening process of moulding sands with hydrated sodium silicate prepared in warm-box technology. This work focuses on mechanical and thermal deformation of moulding sands with hydrated sodium silicate and inorganic additives prepared in warm-box technology. Tested moulding sands were hardened in the temperature of 140ºC for different time periods. Bending strength, thermal deformation and thermal degradation was tested. Chosen parameters were tested immediately after hardening and after 1h of cooling. Conducted research proved that it is possible to eliminate inorganic additives from moulding sands compositions. Moulding sands without additives have good enough strength properties and their economic and ecological character is improved.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 132-137
    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:
    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:
    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
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