The Effect of Vacuum Assistance on the Quality of Castings Produced by High Pressure Die Casting Method

• Autorzy: Łągiewka M. , Konopka Z. , Nadolski M. , Zyska A.

Identyfikatory

DOI

10.2478/afe-2014-0030

• Języki publikacji: EN

Abstrakty

EN

The presented work is aimed to deal with the influence of changes in the value of negative (relative) pressure maintained in the die cavity of pressure die casting machine on the surface quality of pressure castings. The examinations were held by means of the modified Vertacast pressure die casting machine equipped with a vacuum system. Castings were produced for the parameters selected on the basis of previous experiments, i.e. for the plunger velocity in the second stage of injection at the level of 4 m/s, the pouring temperature of the alloy equal to 640°C, and the die temperature of 150°C. The examinations were carried on for three selected values of negative gauge pressure: - 0.03, - 0.05, and - 0.07 MPa. The quality of casting was evaluated by comparing the results of the surface roughness measurements performed for randomly selected castings. The surface roughness was measured by means of Hommel Tester T1000. After a series of measurements it was found that the smoothest surface is exhibited by castings produced at negative gauge pressure value of - 0.07 MPa.

Słowa kluczowe

EN

innovative foundry technologies; aluminium alloys; quality of castings; surface roughness; defects in pressure die castings

PL

innowacyjne technologie odlewnicze; stopy aluminium; jakość odlewów; chropowatość powierzchni; defekty

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 2
• Strony: 23--26
• Opis fizyczny: Bibliogr. 12 poz., tab., wykr.

Twórcy

autor

Łągiewka M.

• Department of Foundry, Częstochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Polska

autor

Konopka Z.

• Department of Foundry, Częstochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Polska

autor

Nadolski M.

• Department of Foundry, Częstochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Polska

autor

Zyska A.

• Department of Foundry, Częstochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Polska

Bibliografia

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• [2] Białobrzeski, A., Kanikula, Z. (1991). Pressure die casting, casting technology, construction of dies. Foundry Institute, Cracow.
• [3] Białobrzeski, A. (1998). Special technologies of pressure die casting. Foundry Institute, Cracow.
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• [5] Bonderek, Z., Chromik, S. (2006). Pressure die casting of metals and injection forming of plastics, WN Akapit.
• [6] Białobrzeski, A., Słowik, P., Wojtarowicz, A. (1984). Experimental works determining the purposefulness of pressure die casting in vacuum. Commissioned program work 7087/I, II, Foundry Institute, Cracow.
• [7] Bielecka, A., Konopka, Z., Zyska, A. & Łągiewka, M. (2007). Investigation of pressure die casting of the aluminium alloy matrix composites with SiC particles, Archives of Metallurgy and Materials. 52(3), 497-502.
• [8] Perzyk, M., Waszkiewicz, S., Kaczorowski, M., Jopkiewicz, A. (2000). Foundry, WNT, Warsaw.
• [9] Górny, Z., Sobczak, J. (2005). Modern casting materials based on non-ferrous metals, Ed. ZA-PIS, Cracow.
• [10] Kojoch, W. (1978). Methods of pressure die casting in vacuum. Selected problems of casting of the non-ferrous metals. Scientific Papers of Silesian University of Technology, No. 23.
• [11] Valette, A. & Fac, T. (2002). The “Full Sleeve”. An innovation technology for pressure casting of aluminium (1), Fonderie, Fondeur d’aujourd’hui. 212, 5-10.
• [12] Konopka, Z., Zyska, A., Łągiewka, M., Bielecka, A. & Nocuń, S. (2008). The „full sleeve” application in the horizontal cold-chamber machine for pressure die casting of aluminium alloys. Archives of Foundry Engineering. 8(1), 65-71.