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    Wyświetlanie 1-6 z 6
    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:
    Compaction of Cores Made by Blowing Methods – Model Investigations
    Autorzy:
    Dańko, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/380080.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    core shooting
    blowing process
    core sand
    core box
    rdzeń wstrzeliwany
    masa rdzeniowa
    rdzeń odlewniczy
    Opis:
    The results of model investigations of the influence of the blowing process selected parameters on the distribution of the compaction of the core made by the blowing method, are presented in the hereby paper. These parameters were: shooting pressure, shooting hole diameter, amount and distribution of deaerating holes. Investigations were performed using the horizontal core box of the cuboidal cavity and the same core box into which inner inserts were introduced. These inserts were dividing the primary volume into three sectors differing in their direction, introduction conditions and the character of the core sand flow. As the compaction measure the apparent sand density was assumed. The density was determined in five measuring points in case of uniform cores, and in three measuring points in case of cores obtained in the core box with three separated sectors. The apparent density of the compacted core sand in the core box cavity was determined on the basis of the measurements of masses and volumes of samples cut-out from the determined core places by means of the measuring probe. Investigations were performed at three values of the working pressure equal 0.4, 0.5 and 0.6MPa for two diameters of the shooting hole: 10 and 20 mm. During tests the core box deaeration, controlled by an activisation of the determined number of deaerating vents placed in the core box, was also subjected to changes.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 191-197
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Density Distribution and Resin Migration Investigations in Samples of Sand Core Made by Blowing Method
    Autorzy:
    Dańko, R.
    Jamrozowicz, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/106993.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    core shooting
    core blowing
    molding sand
    resin migration
    Opis:
    Resin migration in a core can occur during the core production process performed by blowing methods in which the core sand is transported into the core box as a two-phase sand-air flux characterized by various working parameters (working pressure, shooting time, volumetric concentration). This migration is the result of the resin being blown off from the matrix grain surfaces by compressed air. The methodology of the investigation of this effect developed at AGH University of Science and Technology is presented in this paper. The results of the resin migration tests obtained for cores made with cold-box technology at various working parameters of the shooting process are also shown.
    Źródło:
    Journal of Casting & Materials Engineering; 2017, 1, 3; 70-73
    2543-9901
    Pojawia się w:
    Journal of Casting & Materials Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Automatic Core Shooting Parameters in Hot-Box Technology on the Strength of Sodium Silicate Olivine Moulding Sands
    Autorzy:
    Stachowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382292.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry
    sodium silicate
    olivine sand
    hot-box process
    core shooting
    odlewnictwo
    krzemian sodu
    piasek oliwinowy
    proces hot-box
    rdzeń
    Opis:
    The paper presents the results of preliminary research on the application of olivine moulding sands with hydrated sodium silicate containing 1.5 % wt. of binder to perform ecological casting cores in hot-box technology using a semi-automatic core shooter. The following parameters were used in the process of core shooting: initial shot pressure of 6 bar, shot time 3 s, the temperature of the core-box: 200, 250 and 300°C and the core curing time: 30, 60, 90, 120 and 150 s. The matrix of the moulding mixture was olivine sand, and the binder of the sandmix was commercial, unmodified hydrated sodium silicate with molar module SiO2/Na2O of 2.5. In one shot of the automatic core-shooter were formed three longitudinal specimens (cores) with a dimensions 22.2×22.2×180 mm. The samples obtained in this way were subjected to the assessment of the influence of the shooting parameters, i.e. shooting time, temperature and curing time in core-box, using the following criteria: core box fill rate, mechanical strength to bending RgU, apparent density, compaction degree and susceptibility to friability of sand grains after hardening. The results of trials on the use of olivine moulding sands with hydrated sodium silicate (olivine SSBS) in the process of core shooting made it possible to determine the conditions for further research on the improvement of inorganic hot-box process technology aimed at: reduction of the heating temperature and the curing time. It was found that correlation between the parameters of the shooting process and the bending strength of olivine moulding sands with sodium silicate is observed.
    Źródło:
    Archives of Foundry Engineering; 2020, 20, 1; 67-72
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigations of the Mechanism of the Sand Shooting into the Core Box
    Autorzy:
    Dańko, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/379842.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    core
    core box
    sand shooting
    deaerating
    rdzeń
    rdzenie skrzynkowe
    piaskowanie
    odpowietrzanie
    Opis:
    The results of investigations of sand shooting into the core box are presented in the hereby paper. The investigations concern the formation of the diphase sand-air flux, its motion, flowing and compaction in the cavity during the core forming. Conditions deciding on the course of individual phases of the process are discussed with taking into consideration the influence of such factors as: the shot pressure, shooting hole diameter, number and distribution of deaerating vents in experimental core boxes (of a single cavity and of multi cavities) on the core sand compaction state. Investigations were performed by means of the modernised experimental shooting machine SR-3D, of the shooting chamber volume of 3.3 dm3, connected with the system of pneumatic supply ensuring the stable pressure supply of values: 0.4 MPa, 0.5 MPa and 0.6 MPa. Two diameters of the shooting hole, equal 10 mm and 20 mm, were applied for filling three experimental core boxes differing in dimensions of cavities and in number and distribution of deaerating vents. The filling process of core boxes was recorded by means of the digital camera PHANTOM V210 with the filming rate of 3000 pictures in second. Simultaneously, during the shot, other values allowing to determine the intensity of the core sand outflow from the shooting chamber to the core box, were tested. The presented in this publication results constitute the important element of the experimental verification of the blowing process simulation calculations which will be performed.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 113-119
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on Selected Types of Lustrous Carbon Carriers After the High - Temperature Pyrolysis
    Autorzy:
    Kamińska, Jadwiga
    Stachowicz, M.
    Kubecki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1837781.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry
    green moulding sand
    lustrous carbon
    pyrolysis
    core shooting
    odlewnia
    piasek formierski
    węgiel błyszczący
    piroliza
    Opis:
    For research purposes and to demonstrate the differences between materials obtained from the carbonaceous additives to classic green moulding sands, five lustrous carbon carriers available on the market were selected. The following carbonaceous additives were tested: two coal dusts (CD1 and CD2), two hydrocarbon resins (HR1 and HR2) and amorphous graphite (AG1). The studies of products and material effects resulting from the high-temperature pyrolysis of lustrous carbon carriers were focused on determining the tendency to gas evolution, including harmful compounds from the BTEX group (benzene, toluene, ethylbenzene and xylene). Moreover, the content of lustrous carbon (LC), the content of volatile matter and loss on ignition (LOI) of the carbonaceous additives were tested. The solid products formed during high-temperature pyrolysis were used for the quantitative and qualitative evaluation of elemental composition after the exposure to temperatures of 875oC in a protective atmosphere and 950oC in an oxidizing atmosphere. The conducted studies have indicated the necessity to examine the additives to classic green moulding sands, which is of particular importance for the processing, rebonding and storage of waste sand. The studies have also revealed some differences in the quantitative and qualitative composition of elements introduced to classic moulding sands together with the carbonaceous additives that are lustrous carbon carriers. It was also considered necessary to conduct a research on lustrous carbon carriers for their proper and environmentally friendly use in the widely propagated technology of classic green sand system.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 56-62
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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