Modeling of mould cavity filling process with cast iron in Lost Foam method Part 1. Mathematical model – rate of pattern gasification

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

Abstrakty

EN

In this work a mathematical model of mould cavity filling process with cast iron for lost foam method was shown, enclosing phenomena connected with gasification of foamed polystyrene pattern. For its description the thermal balance equation was used, which together with pouring rate equations (part 2) and pressure change equations (part 3) enabled determination of permeability, refractory coating thickness and foam pattern density influence on pouring rate, gas pressure in gas gap and its size. In this work authors showed results of numerical simulation concerning rate of pattern gasification and gas gap size, based on developed mathematical model. Presented studies indicated, that with decrease in coating permeability and increase in its thickness the gas gap size increased causing the decrease of foamed polystyrene pattern gasification rate.

Słowa kluczowe

EN

metal casting; Lost Foam process; foamed polystyrene pattern

PL

metoda pełnej formy; model matematyczny

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 3s
• Strony: 69--74
• Opis fizyczny: Bibliogr. 9 poz., rys., wykr.

Twórcy

autor

Pacyniak T.

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

autor

Kaczorowski R.

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

Bibliografia

• [1] Shroyer H.F.: “Cavityless casting mold and method of making same”, US Patent No. 2 830 343 (1958).
• [2] Smith T.R.: “Method of casting”, US Patent No. 3 157 924 (1964).
• [3] Austin T. E.: ”Advancements in Lost Foam prototyping.”, Modern Casting 88 (1998) s. 54–56.
• [4] Pacyniak T.: Theoretical and technological fundamentals of casting manufacturing with use of lost foam process, Zeszyty Naukowe Nr 985 Politechnika Łódzka 2006 (in Polish).
• [5] Perry, R.H.; Green, D.W.:” Perry's Chemical Engineers' Handbook (7th Edition)”, 1997 McGraw-Hill.
• [6] Hopf W., Bast J., Radoev B.: “Modellierung der Formfüllung beim Vollformgießen, Teil 1. Matematisches Modell: Wärme- und Massebilanz”, Giessereiforschung 51 (1999) Nr 4 s. 145-153.
• [7] Shivkumar S. et al.: „Mechanism of formation and elimination of polymer degradation product”, Process of Expandable Pattern Casting”, Birmingham, 1993.
• [8] Shivkumar S., Yao X., Makhlouf M.: “Polymer - melt interactions during casting formation in the lost foam process”, Scripta Metallurgica et Materialia, 1995, vol. 33, No 1, s. 39-46.
• [9] Pacyniak T., Kaczorowski R.: Studies of refractory coating applied on foamed polystyrene patterns used in lost foam process, Krzepnięcie metali i stopów, Rok 2004, Rocznik 1, Nr 40, PAN Katowice (in Polish).