The dimensional and shape accuracy of vacuum castings prepared in plaster moulds

• Autorzy: Pawlak M.
• Języki publikacji: EN

Abstrakty

EN

The results of laboratory test on the dimensional and shape accuracy of bronze plaster castings CuSn10, CuSn5Zn5Pb5and AlSi11 silumin are presented in this paper. The test castings were made in form of rods of length 100mm and diameters 4 mm, 7 mm and 10mm. The temperatures of molten alloys were 1120, 1160 and 1200 C for bronzes and 700, 750 and 800 C for silumins. Mould temperatures 500 and 600 C and 250 and 300 C respectively. The relative dimension change in given technological conditions by relating to the wax model. Analogical researches were made for plate-like CuSn10 bronze castings by calculating the relative dimension change in two perpendicular axis. Obtained results allowed to state that temperature of cast alloy influences the relative dimensional change, next the mould temperature and type of material (CuSn5Zn5Pb5, CuSn10, AlSi11 relatively). The transverse dimension of the mould does not influence the dimensions of test castings. Temperature of the mould as well as casting temperature do not influence the shape accuracy of the castings.

Słowa kluczowe

EN

innovative foundry technologies; innovative foundry material; precision casting; plaster mould; dimensional accuracy

PL

innowacyjne technologie odlewnicze; innowacyjne materiały odlewnicze; odlewanie precyzyjne; forma odlewnicza; dokładność wymiarowa

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2011
• Tom: Vol. 11, iss. 3
• Strony: 143--148
• Opis fizyczny: Bibliogr. 7 poz., rys., tab., wykr.

Twórcy

autor

Pawlak M.

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

Bibliografia

• [1] Clegg A. J.: Precision Casting Processes, Pergamon Press, 1991, pp. 120-121.
• [2] Nelson C. D.: Plaster Molding, In: Metals Handbook, Vol. 15 Casting, pp. 245.
• [3] Lewandowski L.: Moulding materials, "Akapit", Kraków 1997 (in Polish).
• [4] Skarbiński M.: The accuracy of casting, WN-T, Warszawa 1965, pp. 445-446 (in Polish).
• [5] Pawlak M.: Ability of the CuSn10 and CuSn5Zn5Pb5 bronzes fullfilment of plaster mould cavity during underpressure casting, Archives of Foundry Engineering, Vol. 10, Issue 4, October-December 2010, pp. 163÷168.
• [6] Pawlak M.: Zdolność wypełniania wnęki formy gipsowej przez siluminAlSi11 podczas zalewania z zastosowaniem podciśnienia, Polska Metalurgia w latach 2006-2010, Komitet Metalurgii PAN, Kraków 2010, 283-390.
• [7] PN-86/B-04360 Binders based on calcium sulfate. Method of tests for physical properties (in Polish).