Ceramic Mould Internal Structure Anomalies in the Lost Wax Process

• Autorzy: Biernacki R. , Grześ J. , Haratym R. , Tomasik J.
• Języki publikacji: EN

Abstrakty

EN

The paper analyzes the structure of the ceramic mould, which include discussion about its structure creation. The results of research relate to the strength of the ceramic mould and its thermophysical properties. Structural anisotropy was found and its influence on the mould surface morphology depending on its position with respect to the sprue in the assembly set. The paper also presents evaluation of microgeometry of patterns, ceramic mould and casts produced in a joint production process. Last part includes the results of the fractal dimension measurements of ceramic mould cross-sections. The analysis was based on the mould porosity. For the analyzed structures the percentage of pores and linear fractal dimension was determined, using the line counting dimension method (LCD), which is a modification of box counting dimension method (BCD).

Słowa kluczowe

EN

ceramic mould; anisotropy properties; fractal dimension; heat transfer coefficient

PL

formy ceramiczne; właściwości anizotropowe; wymiar fraktalny; współczynnik przewodnictwa cieplnego

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 1 spec.
• Strony: 57--62
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr.

Twórcy

autor

Biernacki R.

• Warsaw University of Technology, Institute of Manufacturing Technology, Narbutta 85, 02-524 Warszawa, Poland

autor

Grześ J.

• Warsaw University of Technology, Institute of Manufacturing Technology, Narbutta 85, 02-524 Warszawa, Poland

autor

Haratym R.

• University of Ecology and Management, Olszewska 12, 00-792 Warszawa, Poland

autor

Tomasik J.

• Warsaw University of Technology, Institute of Metrology and Biomedical Engineering, A. Boboli, 02-525 Warsaw, Poland

Bibliografia

• [1] M. Rafiquea, J. Iqbalb. Modeling and simulation of heat transfer phenomena during investment casting. International Journal of Heat and Mass Transfer, Volume 52, 2009, Issues 7–8, pp 2132–2139.
• [2] H. Chattopadhyay. Estimation of solidification time in investment casting process. Internalional Journal Advanced Manufacturing Technology Volume 55, 2011, Issue 1-4, pp 35-38.
• [3] Haratym R, Lewiński J, Biernacki R, Kowaluk T. Anisotropy of ceramic moulds physical properties which affect environmentally friendly production of precision aluminum castings. Archives of Foundry Engineerig, Volume 12, Special Issue 1/2012, 53-56, 2012.
• [4] J. Grześ, The fractial dimension of selected structures of H17 steel join., Warsaw University of Technology, Publishing House. Prace Naukowe – Mechanika. z.229, 23-31 (2009) (in Polish).
• [5] Haratym R. Influence of recycling of used ceramic moulds materials on some thermo - physical properties in investment casting process. Archives of Foundry. 2006; 20: 141-146 (in Polish).
• [6] R. Haratym, R. Biernacki, D. Myszka, Ecological investment casting in ceramic dies, Warsaw University of Technology, Publishing House, Warsaw (2008) (in Polish).
• [7] M. Wiktorski, M. Pawlak, Z. Niedźwiedzki. A stand to search coefficient of thermal conductivity for materials applied on plaster moulds in precision casting. Archives of Foundry, Year 2004, Volume 4, № 13 (in Polish).