Pressure of gas in gas gap during Lost Foam Process

• Autorzy: Pacyniak T. , Kaczorowski M.
• Języki publikacji: EN

Abstrakty

EN

In the study, a model and some fundamental relationships describing changes of gas pressure in the gas gap during manufacture of castings by the Lost Foam process were described. The mathematical description uses the equation of gas state and the equation of Darcy's rate of filtration. The equations describing changes of gas pressure in the gas gap and the kinetics of melting of a foamed polystyrene pattern as well as the dynamics of the process of mould filling with molten alloy were used in analysis of the effect of selected technological parameters on changes of gas pressure in the gas gap. The effect of foamed polystyrene pattern density and permeability, and of the protective coating thickness on changes of pressure in the gas gap were discussed.

Słowa kluczowe

EN

foundry engineering; lost foam; foamed polystyrene patterns

PL

odlewnictwo; technologia pełnej formy

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2007
• Tom: Vol. 7, iss. 4
• Strony: 137--140
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr.

Twórcy

autor

Pacyniak T.

autor

Kaczorowski M.

• Technical University of Lodz, Chair of Materials Engineering and Production Systems, Stefanowskiego 1/15, 90-924 Łódź, Poland,

Bibliografia

• [1] Shroyer H. F.: US Patent No 2, 830, 343, 1958.
• [2] Clegg A. J.: Expanded-polystyrene Moulding - a Status Report, Foundry Trade Journal International, June 1986, 51-69.
• [3] Lejbenzon L. S.: Dwiżenije prirodnych żidkostiej i gazow w poristoj sriedie. Gostoptechidat, Moskwa 1947.
• [4] Szreniawski J.: Sand casting mould, WNT Warszawa 1968, (in Polish).
• [5] Pacyniak T.: Effect of Foamed Pattern Density on the Lost Foam Process; Archives Of Foundry Engineering Issue 3/2007 Vol. 7, s. 231-236
• [6] Pacyniak T.: Theoretical and technological basics of casting production with full-mold method process, Zeszyty Naukowe Nr 985 Politechnika Łódzka 2006, (in Polish).
• [7] Pacyniak T., Kaczorowski R.: Properties investigations of coatings spreading on polystyrene models in casting production by LOST FOAM method, Krzepnięcie metali i stopów, Rok 2004 Rocznik 1, Nr 40, PAN Katowice.