Gas pressure in sand mould poured with cast iron

• Autorzy: Chojecki A. , Mocek J.
• Języki publikacji: EN

Abstrakty

EN

The results of measurements of gas pressure in foundry moulds made from sands bonded with bentonite, sodium silicate and furan resin were disclosed. It was found that the maximum pressure during pouring of mould with metal occurs in the case of bentonite sands, especially with the addition of coal dust. The effect of this pressure on the formation of surface defects in castings was examined.

Słowa kluczowe

EN

moulding sand; gas pressure; defect; casting surface

PL

piasek odlewniczy; ciśnienie gazu; wada odlewnicza; powierzchnia odlewu

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2011
• Tom: Vol. 11, iss. 1
• Strony: 9--14
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.,

Twórcy

autor

Chojecki A.

autor

Mocek J.

• Department of Moulding Materials, Mould Technology and Foundry of Non-ferrous Metals, Faculty of Foundry Engineering, AGH University of Science and Technology, ul. Reymonta 23, 30-059 Kraków, Poland,

Bibliografia

• [1] A. Chojecki, J. Kusiński: Reoxydation phenomena during filling of ferrous castings. Technological Engineering 5, 2008, nr 5, pp 36-39.
• [2] J. Mocek, A. Chojecki: Evolution of the gas atmosphere during filling the sand mould with iron alloys. Archives of Foundry Eng. 9, 2009, nr 4 pp 135-140.
• [3] M. Holtzer.and A. Bobrowski: Analysis of gases emitted from bentonite-carbon carrier mixtures, used in metal casting at the range of 30-1000oC, Archives of Foundry Engineering 2010, v. 10, iss. 3, pp 193-198.
• [4] J. Campbell: Castings, sec. edition, Elsevier Butterworth Heinemann, 2004.
• [5] R. Wellbrock, D. Ashburn: Carbonaceous Additives and Emission of Benzene during the Metal casting Process. AFS Transactions 1988, 11, pp 293-299.
• [6] H. W. Dietert, A. L Graham, R. M. Praski: Gas evolution in foundry materials. Its source and Measurement. AFS Trans. 1976, 55, pp 221- 228.
• [7] J. Orlenius, A. Dioszegi, Z. Dioszegi: Gas absorption in gray iron during mould filling. Int. J. Cast Met. Res. 2008, 21, pp 427-434.
• [8] T. Szmigielski: Measurement of gas pressure in sand mould. Archives of Mechanical Technology 24, 2004, nr 3, pp 163-171.
• [9] P. Scraber, C. Bates, J. Griffin: Avoiding gas defects through mould and core package design. Modern Casting, v. 96, issue 12, 2006, pp 38- 40.
• [10] A. Chojecki, J. Mocek, N. Sobczak, A. Siewiorek: Gas evolution from the heated bentonite-bondet moulding sand. To be published.
• [11] A. Siewiorek, R. Nowak, A. Chojecki, J. Mocek : Gas evolution rate from heated moulding sands bended with organic binders. Archives of Foundry Eng (this issue).