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Wyszukujesz frazę "lost technology" 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:
    The Influence of Remelting on the Quality of Prosthetic Cobalt Alloys
    Autorzy:
    Nadolski, M.
    Łągiewka, M.
    Konopka, Z.
    Zyska, A.
    Golański, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/382647.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cobalt alloy
    centrifugal casting
    lost wax technology
    dental prosthetics
    stop kobaltu
    odlewanie odśrodkowe
    metoda wytapianych modeli
    protetyka stomatologiczna
    Opis:
    A commercial cobalt alloy applied in dental prosthetics was investigated. The scope of the work included the microstructure analysis, performance examination (tensile strength, microhardness, corrosion resistance), and dilatometric examination. The investigated alloy after a single remelting was characterised by higher tensile strength and hardness. There were not found the definite results with regard to the corrosion resistance of the examined materials. No significant change occurred in the coefficient of thermal expansion.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3 spec.; 53-58
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Casting Technology Experiment and Computer Modeling of Ornaments from Bronze Age
    Autorzy:
    Garbacz-Klempka, A.
    Suchy, J. S.
    Kwak, Z.
    Długosz, P.
    Stolarczyk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/353122.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    archeometallurgy
    copper alloys
    investment casting technology
    lost-wax casting
    modeling
    Opis:
    The casting workshop was discovered with numerous artifacts, confirming the existence of the manufacturing process of metal ornaments using ceramic molds and investment casting technology in Lower Silesia (Poland) in 7-6 BC. The research has yielded significant technological information about the bronze casting field, especially the alloys that were used and the artifacts that were made from them. Based on the analyses, the model alloys were experimentally reconstructed. Taking advantage of the computer-modeling method, a geometric visualization of the bronze bracelets was performed; subsequently, we simulated pouring liquid metal in the ceramic molds and observed the alloy solidification. These steps made it possible to better understand the casting processes from the perspective of the mold technology as well as the melting and casting of alloys.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1329-1337
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Investment Casting Technology from Bronze Age. Casting Workshop in Grzybiany (Southwest Poland)
    Autorzy:
    Garbacz-Klempka, A.
    Suchy, J. S.
    Kwak, Z.
    Tokarski, T.
    Klempka, R.
    Stolarczyk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/352158.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    archeometallurgy
    copper alloys
    investment casting technology
    lost wax casting
    x-ray spectroscopy
    Opis:
    Investment casting technology that utilizes lost-wax casting is one of the most-important achievements of ancient society. In Lower Silesia, Poland (Grzybiany, Legnica county), a 7-6 BC casting workshop was discovered with numerous artifacts, confirming the existence of the manufacturing process of metal ornaments using ceramic molds. The paper presents the research of molds and casts from the Bronze and Early Iron Ages. Microscopic analyses of the casting molds were performed, along with radiographic and chemical composition tests of the artifacts (the latter employing the use of the X-ray fluorescence spectroscopy method). The clustering method was used for alloy classification. The microstructure was analyzed by means of Scanning Electron Microscopy with Energy Dispersive Spectroscopy. Conclusions from the research were utilized in further experiments.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 615-624
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    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:
    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
      Wyświetlanie 1-8 z 8

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