The effect of refractory coating permeability on the Lost Foam Process

• Autorzy: Pacyniak T.
• Języki publikacji: EN

Abstrakty

EN

The article analyses the effect of refractory coating permeability on the process of casting manufacture by the Lost Foam technique. The analysis was focussed on simulation tests examining the effect of coating permeability on the mould cavity filling rate, pressure in gas gap, and the size of this gap. In simulation tests of the Lost Foam Process, a mathematical model of the process presented in this study and the author's own computation algorithm were used. The computations have proved that with increasing permeability of the protective coating, the pouring rate increases, too, while pressure of gas in the gas gap and the size of the gap are decreasing. The increasing pouring rate ensures correct making of castings, even if their shape is very intricate and the wall cross-sections are very small. Smaller size of the gas gap and lower gas pressure in the gap reduce the risk of mould damage. The author's own investigations confirmed the importance of the refractory coating permeability and its effect on the casting process, mould pouring rate - in particular.

Słowa kluczowe

EN

metal casting; lost foam; foamed polystyrene patterns; patterns

PL

odlewnictwo metali; technologia pełnej formy; model

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 3
• Strony: 199--204
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Pacyniak T.

• Department of Materials Engineering and Production Systems, Technical University of Łódź Stefanowskiego 1/15 Street, 90-924 Łódź,

Bibliografia

• [1] A. J. Clegg: Expanded-polystyrene Moulding - a Status Report, Foundry Trade Journal International, June 1986, 51-69.
• [2] T. Pacyniak, R. Kaczorowski: Investigating the properties of refractory coatings applied on polyester patterns used in casting production by Lost Foam Process. PAN Katowice, Archiwum Odlewnictwa, Rocznik 3, nr 8, s. 147155 (in Polish).
• [3] R. C. Rodgers: Foundry Management and Technology, 1989.
• [4] P. S. Wilkins: UK Patent nr 2.183.517, 1987.
• [5] P. Beauvais, P. Mabilais, A. Ribon: BISI Translation 27398 of Foundrie-Fondeur Aujourd'hui, 1988, 79, 11.
• [6] G. Del Gaudio, G. Serramogia, G. Caironi, G. Tosi: Metallurgical Scence and Technology, 1985, 3, 3, 76.
• [7] D. Taylor: UK Patent No 2.193.666, 1988.
• [8] T. Pacyniak: Theoretical and technological backgrounds of the full mold process of casting manufacture. Zeszyty Naukowe Nr 985 Politechnika Łódzka, 2006 (in Polish).