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Wyszukujesz frazę "technologia lost" wg kryterium: Temat

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    Wyświetlanie 1-8 z 8
    Tytuł:
    Research on the Influence of Basic Parameters of the Pre-Expansion of Granules Density
    Autorzy:
    Buczkowska, K.
    Kaczorowski, R.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382544.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry process
    lost technology
    polystyrene model
    proces odlewania
    technologia lost
    model polistyrenowy
    Opis:
    The paper presents the process of pre-expanded polystyrene used to produce models in the Lost Technology. There were research on pre-expansion process in order to determine the effect of pressure and time for the initial expansion of the materials density. Analysis of the results confirmed that the higher the pre-expansion pressure is the materials density decreases. There was also a change in the intensity of the process in function of time and pressure, which may indicate the phenomena of material physical and chemical properties during the process.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 2 spec.; 22-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prototype Stand for Determining Quantities of Gasification Products of Polystyrene Model
    Autorzy:
    Jureczko, Michał
    Bartocha, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079785.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lost foam
    full mold
    polystyrene model
    research stand
    technologia lost foam
    pełna forma
    model polistyrenowy
    stanowisko badawcze
    Opis:
    Disposable foundry models constitute an increasingly important role in a unitary large-size foundry. These models have many benefits, but technologies using such materials require an understanding of degradation kinetics at the time of filling. The studies presented in the article determine the size of the polystyrene combustion products used for disposable foundry models. The results were obtained by carrying out the combustion process of the polystyrene model in a special combustion chamber, in different configurations. The pressures generated during thermal degradation vary depending on process parameters such as model density or the use of an additional adhesive binder. The results of laboratory tests may suggest what values of pressure are generated when filling in full-mold and lost foam technologies. The studies provide a prelude to further analysis of materials used for disposable foundry models and quantitative evaluation of their thermal degradation products for computer simulation.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 4; 15-20
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Microwave Heating of Protective Coatings Used in the Lost Foam Technology
    Autorzy:
    Opyd, B.
    Granat, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382105.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    microwave
    protective coating
    lost foam
    innowacyjna technologia odlewnicza
    mikrofale
    powłoka ochronna
    tracona piana
    Opis:
    Presented are results of a preliminary research on determining a possibility to use microwave radiation for drying casting protective coatings applied on patterns used in the lost foam technology. Taken were measurements of permittivity εr and loss factor tgδ at 2.45 GHz, as well as attempts were made of microwave drying of a protective coating based on aluminium silicates, applied on shapes of foamed polystyrene and rigid polymeric foam. Time and results of microwave drying were compared with the results obtained by drying at 50 °C by the traditional method commonly used for removing water from protective coatings. Analysis of the obtained drying kinetics curves demonstrated that selection of proper operation parameters of microwave equipment permits the drying time to be significantly shortened. Depending on kind of the pattern material, drying process of a protective coating runs in a different way, resulting in obtaining different quality of the dried coating.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2; 65-70
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of master alloy amount and gating system design for ductile cast iron obtain in lost foam process
    Autorzy:
    Just, P.
    Kaczorowski, R.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/379923.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting technologies
    ductile iron
    inmold method
    lost foam casting
    innowacyjna technologia odlewnicza
    żeliwo sferoidalne
    metoda in mold
    tracona piana
    Opis:
    The paper presents the optimization of master alloy amount for the high nodular graphite yield (80-90%) in cast iron obtain in lost foam process. The influence of the gating system configuration and the shape of the reaction chamber, the degree of spheroidisation cast iron was examined. Research has shown that the, optimal of master alloy amount of 1.5% by mass on casting iron. The degree of spheroidisation is also influenced by the gating system configuration. The best spheroidisation effect was obtained for liquid cast iron was fed into the reaction chamber from the bottom and discharged from the top.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3; 43-46
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Aging Time Effects of the Pre-expanded Polystyrene on the Patterns Mechanical Properties
    Autorzy:
    Buczkowska, K.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381049.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative casting technology
    Innovative casting material
    foundry
    lost foam
    model of polystyrene
    casting
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    tracona piana
    polistyrenowy model odlewniczy
    Opis:
    The aging granulate is to activate the blowing agent during the manufacturing process to granulate models can re-expand and shape the model of well-sintered granules, smooth surface and a suitable mechanical strength. The article presents the results of studies which aim was to determine the optimum time for aging pre-foamed granules for pre-selected raw materials. The testing samples were shaped in an autoclave, with constant parameters sintering time and temperature. Samples were made at 30 minute intervals. Models have been subjected to flexural strength and hardness.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1; 131-137
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of time and pressure of forming a pattern on mechanical properties
    Autorzy:
    Pacyniak, T.
    Buczkowska, K.
    Kaczorowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/382163.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    foundry engineering
    lost foam
    polystyrene pattern
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    przemysł odlewniczy
    tracona piana
    styropianowy model odlewniczy
    Opis:
    In this paper, the technology of forming patterns on a research station equipped with an autoclave A-600 of Polish company GROM is presented. This study was conducted to determine the influence of pressure and time of forming a pattern on the bending strength. Analysis of the results confirmed that bending strength increases with increasing the pressure. The time of forming a pattern has a similar effect.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 151-156
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temperature and microstructure characteristics of silumin casting AlSi9 made with investment casting method
    Autorzy:
    Pietrowski, S.
    Rapiejko, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/380337.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    lost wax molding
    investment casting
    silumin casting
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    metoda traconego wosku
    odlewnictwo precyzyjne
    odlew siluminowy
    Opis:
    This work presents the research result of the temperature distribution and the microstructure in certain parts of the field-glass body frame casting made from silumin AlSi9 using the investment casting method in the ceramic mould. It was proved that the highest temperature of the silumin appears in the sprue in which the silumin is in the liquid-solid state, though the process of silumin crystallization in the casting is finished. It was stated that in certain elements of the casting the side opposite to the runner crystallizes and cools fastest. The differences in the rate of crystalline growth and cooling of certain casting elements cause different microstructure in them which can also influence the mechanic properties. It is necessary to state that the temperature of the initial heating of the ceramic mold equal to 60ºC guarantees obtaining of the castings without defects and of little porosity. Incomplete modification of the silumin with strontium causes silica precipitation to appear close to the spherical ones.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 3 spec.; 177-186
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ rodzaju, grubości pokrycia ceramicznego oraz gęstości zespołu modelowego na stopień zagazowania odlewu
    The Effect of the Type, the Ceramic Coating Thickness and the Pattern Set Density on the Degree of Gas Porosity in Casting
    Autorzy:
    Buczkowska, K.
    Just, P.
    Świniarska, J.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382587.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjny materiał odlewniczy
    innowacyjna technologia odlewnicza
    tracona piana
    pokrycie ceramiczne
    pokrycie ogniotrwałe
    spienione tworzywo wielkocząsteczkowe
    zagazowanie odlewu
    innovative foundry material
    innovative foundry technology
    lost foam process
    ceramic coating
    gas porosity
    Opis:
    W pracy poruszone zostały zagadnienia związane z technologią lost foam. Zbadano wpływ rodzaju oraz grubości pokrycia ceramicznego a także gęstości zespołu modelowego na stopień zagazowania odlewu. Badania przeprowadzono dla dwóch rodzajów pokryć ceramicznych Disopast 4805/3 oraz Disopast 7759, które nakładano na modele ze spienionego polistyrenu w jednej, dwóch i trzech warstwach. Tak przygotowane modele wykorzystano do wytworzenia odlewów ze stopu AlSi11 w technologii lost foam. Otrzymane odlewy zbadano pod kątem stopnia ich zagazowania. Zaprezentowane badania wykazały zależności pomiędzy gęstością modelu, rodzajem i grubością zastosowanych powłok ceramicznych, a stopieniem zagazowania odlewów. Wykazano, że badane właściwości mają istotny wpływ na stopień zagazowania odlewu, jego porowatość oraz liczbę gazową. Poprzez odpowiedni dobór pokrycia, jego grubości, gęstości modelu, możliwe jest zminimalizowanie stopnia zagazowania odlewu.
    The study addressed the issues associated with lost foam casting technology. The effect of the type and thickness of the ceramic coating and the density of the pattern set of the degree of gas porosity in casting. The study was conducted for two types of ceramic coatings Disopast 4805/3 and Disopast 7759, which was applied to patterns with expanded polystyrene in one, two and three layers. Thus prepared patterns were used to produce castings alloy AlSi11 lost foam technology. The resulting castings were tested for their level of gas porosity. Presented studies have shown the relationship between the density of the polystyrene pattern, type and thickness of the applied ceramic coatings gas porosity and casting melt. It has been shown that investigated the properties have a significant impact on the degree of gas porosity in cast, its porosity and the gaseous number. Through an appropriate choice of coating, its thickness, density model, it is possible to minimize the degree of gassing casting.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2 spec.; 7-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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