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Wyszukujesz frazę "coating viscosity" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
The Assessment of the Permeability of Selected Protective Coatings Used for Sand Moulds and Cores
Autorzy:
Jamrozowicz, Ł.
Siatko, A.
Powiązania:
https://bibliotekanauki.pl/articles/381009.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
permeability
protective coatings
coating viscosity
core
mold
przepuszczalność
powłoki ochronne
lepkość powłoki
rdzeń
forma
Opis:
The article presents the results of permeability measurements of a zirconium alcohol coating applied on moulds and cores. The introduction extensively discusses the reasons for the application of protective coatings, as well as their advantages and disadvantages. Also, the problems related to the application of protective coatings are presented i.e. limited permeability and thus the possibility of the presence of gas-originated defects in the casts. Next, the paper discusses the methods of measuring the permeability of protective coating proposed by Falęcki and Pacyniak. The study also presents an indirect permeability measurement method. For the investigations, zirconium alcohol coatings with the three conventional viscosities 10, 20 and 30s were used. The viscosity was determined by means of the Ford cup with the clearance of 4mm. The coatings were applied onto profiles of Φ 50x50 mm, made of moulding sand consisting of a sand matrix with the mean grain size of dL = 0,11, 17, 24, 31 and 34 mm and phenol-formaldehyde resin. The effect of the matrix grain size on the permeability of the sand with and without a coating was determined.
Źródło:
Archives of Foundry Engineering; 2020, 20, 1; 17-22
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of the Thickness of Protective Coatings Deposited on Moulds and Cores
Autorzy:
Jamrozowicz, Ł.
Kolczyk-Tylka, J.
Siatko, A.
Powiązania:
https://bibliotekanauki.pl/articles/380191.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
protective coating
coating thickness
coating viscosity
foundry core
foundry mold
powłoka ochronna
grubość powłoki
lepkość powłoki
rdzeń odlewniczy
masa odlewnicza
Opis:
This article presents measurements of the thickness of alcohol-based coatings on sand foundry cores and moulds. These coatings were applied using two methods, the dipping method and the painting method. For the purposes of the study, a zircon alcohol-based coating was prepared with three different levels of nominal viscosity; very thin at 10s, average at 20s, and thick at 30s. The coating was applied to a core made of quartz sand and furan resin. The cores were made of sand with three different grain sizes; dL = 0.22 mm – fine sand, dL = 0.33 mm medium sand, and dL = 0.47 mm coarse sand. In the study, the thickness of the coating obtained to the core was measured immediately after application as well as after drying. Additionally, the extent of penetration into the intergranular spaces of the core matrix was measured. On the basis of this study, the impact of the grain size of the core matrix on the thickness of the coating and its penetration into the core was assessed. The thickness of coatings obtained using different application methods was also assessed.
Źródło:
Archives of Foundry Engineering; 2018, 18, 4; 131-136
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania właściwości reologicznych wybranych powłok ochronnych stosowanych na formy i rdzenie piaskowe
Rheological Properties of Selected Coatings for Molds and Sand Cores
Autorzy:
Jamrozowicz, Ł.
Kolczyk, J.
Matonis, N.
Woźniak, D.
Powiązania:
https://bibliotekanauki.pl/articles/380193.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
proces odlewniczy
forma piaskowa
powłoka ochronna
właściwości reologiczne
lepkość kinematyczna
lepkość dynamiczna
foundry process
sand mould
protective coating
rheology characteristic
kinematic viscosity
dynamic viscosity
Opis:
W artykule zaprezentowano wyniki badań reologicznych powłok ochronnych: wodnej i alkoholowej, o trzech lepkościach umownych 10, 20 i 30 sekund. Badania lepkości dynamicznej prowadzono na lepkościomierzu rotacyjnym Rheotest 2. W wyniku przeprowadzonych pomiarów uzyskano krzywe płynięcia i wyznaczono zależność szybkości ścinania do lepkości dynamicznej, co pozwoliło sklasyfikować badane powłoki pod względem reologicznym.
The article presents the results of measurements of rheological testing of protective coatings: water and alcohol, for three contracts viscosities 10, 20 and 30 seconds. Research of dynamic viscosity were performed on a rotary viscometer Rheotest 2. As a result of measurements of the flow curves were tested and determined the dependence of shear rate viscosity, allowing to classify the rheological properties of coatings.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4 spec.; 47-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Application of Numerical Methods to Evaluate the Viscosity of the Coating Using the Model Extraction Iida
Autorzy:
Biernat, S.
Bydałek, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/381499.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
computer aided manufacturing
numerical methods
viscosity
Iida model
program SLAG-PROP
refining capacity
coating Using
komputerowe wspomaganie produkcji
metody numeryczne
lepkość
model Iida
rafinacja
powlekanie
Opis:
The article presents a reflection on the viscosity of the coating extraction using numerical methods. The viscosity of the coating slag is a factor affecting a high degree on the quality of the ongoing process of refining. Too high a viscosity will restrict the diffusion of impurities from the metal to the slag, in turn, too low a viscosity will cause spreading of slag in the vicinity of the furnace wall, and thus exposing the mirror of the liquid metal which may result in adverse effects of an oxidizing atmosphere. You should also remember that too low a viscosity can increase the loss of metal in the slag as well as hinder its recovery during casting. Using the materials database and numerical methods it is possible to determine the level of selected blends of slag viscosity. Additionally, in order to determine their usefulness in refining the values obtained can be confronted with laboratory tests using derivatograph. On the basis of the designated energy index Ew and mass index r can determine the suitability of a mixture of slag and its impact oxidizing or reducing agents.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3 spec.; 85-89
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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