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Wyszukujesz frazę "furan moulding sand" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Wpływ dodatku regeneratu na właściwości mas z żywicą furanową stosowanych na formy do odlewów ze staliwa manganowego
Influence of the reclaim on the properties of moulding sands with furfuryl resin applied for moulds for manganese steel castings
Autorzy:
Holtzer, M.
Bobrowski, A.
Drożyński, D.
Isendorf, B.
Mazur, M.
Powiązania:
https://bibliotekanauki.pl/articles/381676.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
staliwo manganowe
masa furanowa
regeneracja mechaniczna
spoiwo furanowe
manganese cast steel
furan moulding sand
mechanical reclamation
furan binder
Opis:
W artykule omówiono wpływ dodatku regeneratu uzyskiwanego w procesie regeneracji mechanicznej do masy z żywicą furfurylową na osnowie piasku kwarcowego. Określono wpływ udziału regeneratu na takie parametry masy jak: wytrzymałość na rozciąganie, ścieralność, przepuszczalność i żywotność masy. Badania prowadzono przy udziale regeneratu w osnowie w ilości od 20 do 100%. Uzyskane wyniki wykazały, że optymalne właściwości, uzyskuje masa o składzie 60% regeneratu, 1 cz. mas. żywicy i 0,5 cz. mas. utwardzacza.
The influence of an addition of the reclaim, obtained in the mechanical reclamation process, to the moulding sand prepared on the basis of the high-silica sand with furfuryl resin, was discussed in the paper. The influence of the reclaim fraction on such moulding sand parameters as: tensile strength, wear resistance, permeability and bench life, was determined. Tests were performed at the reclaim fraction in the matrix being from 20 to 100%. The obtained results indicated that the optimal properties were exhibited by the moulding sand containing 60% of the reclaim, 40% new sand and 1 part by weigh of a resin and 0.5 part by weight of a hardener.
Źródło:
Archives of Foundry Engineering; 2012, 12, 1s; 57-62
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of Sand Grains in Sorption Processes by Surface Layers of Components of Sand Moulds
Autorzy:
Kaźnica, N.
Powiązania:
https://bibliotekanauki.pl/articles/383033.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
castings defects
moisture sorption
surface layer
furan moulding sands
sand grains
wady odlewnicze
wilgoć
warstwa powierzchniowa
masa formierska furanowa
furan
Opis:
The results of researches of sorption processes of surface layers of components of sand moulds covered by protective coatings are presented in the hereby paper. Investigations comprised various types of sand grains of moulding sands with furan resin: silica sand, reclaimed sand and calcined in temperature of 700 oC silica sand. Two kinds of alcoholic protective coatings were used – zirconium and zirconium – graphite. Tests were performed under condition of a constant temperature within the range 30 – 35oC and high relative air humidity 75 - 80%. To analyze the role of sand grains in sorption processes quantitavie moisture sorption with use of gravimetric method and ultrasonic method were used in measurements. The tendency to moisture sorption of surface layers of sand moulds according to the different kinds of sand grains was specified. The effectiveness of protective action of coatings from moisture sorption was analyzed as well. Knowledge of the role of sand grains from the viewpoint of capacity for moisture sorption is important due to the surface casting defects occurrence. In particular that are defects of a gaseous origin caused by too high moisture content of moulds, especially in surface layers.
Źródło:
Archives of Foundry Engineering; 2017, 17, 1; 87-92
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of the Sorption Process’ Kinetics of Sand Moulds’ Surface Layers under Conditions of a High Air Humidity
Autorzy:
Kaźnica, N.
Zych, J.
Powiązania:
https://bibliotekanauki.pl/articles/381399.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sand mould
surface layer
moisture sorption
furan moulding sands
alkyd moulding sands
water glass
forma piaskowa
warstwa powierzchniowa
sorpcja wilgoci
furanowa masa formierska
szkło wodne
Opis:
The results of investigations of the sorption process of surface layers of sand moulds under conditions of a high air humidity are presented in the paper. Investigations comprised three kinds of moulding sands with inorganic and organic binders: moulding sand with hydrated sodium silicate with furfuryl resin and with alkyd resin. Tests were performed on the prototype research stand allowing to maintain a constant, high temperature of surroundings (28–33°C) and the relative air humidity (above 95%). The gravimetric method was applied in measurements. The proposed method allows to assess the amount of water which permeates by the area unit of surface layers of sand moulds into their insides. Knowledge of such parameter allows to select the proper storage conditions of casting moulds waiting for being poured with liquid metals. This can limit the occurrence of surface defects which are caused by too high humidity of casting moulds.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3 spec.; 29-32
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Selected Water and Alcohol Based Coatings on Bending Strength of Foundry Moulds and Cores Manufactured in Furan Technology
Autorzy:
Romelczyk, R.
Przyszlak, N.
Siodmok, B.
Dorula, J.
Studnicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/382706.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
water based coating
alcohol based coating
bending strength
moulding sand
furan resin
powłoka wodna
wytrzymałość na zginanie
masa formierska
żywica furanowa
Opis:
The subject of this paper was to compare the influence of selected coatings on bending strength of moulds and cores manufactured in a furan technology. In a range of study, there were used three kinds of coatings - water based coating and two kind of alcohol based coating manufactured by FOSECO. Coating were applicated by brush, overpouring/flow and spraying. For each application method, there were realized different kind of drying- at ambient temperature, in a furnace and by burning. Physicochemical properties of coatings were such selected to accommodate them to the application method and type of coating. Based on the conducted studies it was observed that for water based coating application method doesn’t have an important influence on bending strength and it is necessary to optimize the time and temperature of drying to achieve better results of bending strength. For alcohol based coatings, drying by burning causes significant deterioration of bending strength of the mould and core and drying process at ambient allows to obtain high bending strength of mould/cores in regard to time of drying.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 169-172
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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