How to search?
advanced search

Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 2
items per page: 25 50 75
Sort by:

Prototype Stand for Determining Quantities of Gasification Products of Polystyrene Model

M. Jureczko Dariusz Bartocha
Archives of Foundry Engineering | 2021 | vo. 21 | No 4 | 15-20 | DOI: 10.24425/afe.2021.138674
Keywords Lost Foam Full mold Polystyrene model Prototype research stand
Download PDF Download RIS Download Bibtex

Abstract

Disposable foundry models constitute an increasingly important role in a unitary large-size foundry. These models have many benefits, but technologies using such materials require an understanding of degradation kinetics at the time of filling. The studies presented in the article determine the size of the polystyrene combustion products used for disposable foundry models. The results were obtained by carrying out the combustion process of the polystyrene model in a special combustion chamber, in different configurations. The pressures generated during thermal degradation vary depending on process parameters such as model density or the use of an additional adhesive binder. The results of laboratory tests may suggest what values of pressure are generated when filling in full-mold and lost foam technologies. The studies provide a prelude to further analysis of materials used for disposable foundry models and quantitative evaluation of their thermal degradation products for computer simulation.
Go to article

Bibliography

[1] Pacyniak, T. (2013). Full mold casting. Selected aspects. Lodz: A Series of Monographs, Lodz University of Technology. (in Polish)
[2] Pysz, S., Żółkiewicz, Z., Żuczek, R., Maniowski, Z., Sierant, Z., Młyński, M. (2010). Simulation studies of mould filling conditions with molten metal in evaporative pattern technology. The Transactions of the Foundry Research Institute. 10(3), 27-37.
[3] Shroyer, H.F. (1958). Cavityless Casting Mold and Method of Making Same. U.S. Patent No. 2,830, 343.
[4] Kaczorowski, R., Just, P. & Pacyniak, T. (2013), Test bench for analyzing the lost foam process. Archives of Foundry Engineering. 13(1), 57-62.
[5] Buczkowska, K., Just, P., Świniarska, J. & Pacyniak, T. (2015). The effect of the type, the ceramic coating thickness and the pattern set density on the degree of gas porosity in casting. Archives of Foundry Engineering. 15(2), 7-12.
[6] Żmudzińska, M., Faber, J., Perszewska, K., Żółkiewicz, Z., Maniowski, Z. (2011). Studying the emission of products formed during evaporation of polystyrene patterns in the lost foam process in terms of the work environment. The Transactions of the Foundry Research Institute. 50(1), 23-33.
[7] Żółkiewicz, Z., Baliński, A., Żółkiewicz M. (2017). Characteristics of the thermal process of polystyrene model gasification. The Transactions of the Foundry Research Institute. 17(3), 201 - 210.
[8] Mocek, J. & Chojecki, A. (2014). Gas atmosphere formed in casting by full mold process. Archives of Metallurgy and Materials. 59(3), 1045-1049.
[9] Żółkiewicz, Z. & Żółkiewicz, M. (2010). Characteristic properties of materials for evaporative patterns. Archives of Foundry Engineering. 10(spec. 3), 289-292.
[10] Pielichowski, J., Sobczak, J.J., Żółkiewicz, Z., Hebda, E., Karwiński, A. (2011). The thermal analysis of polystyrene foundry model. The Transactions of the Foundry Research Institute. 11(1), 15-21.
Go to article

Authors and Affiliations

M. Jureczko
1 2
Dariusz Bartocha
ORCID: ORCID
  1. Department of Foundry Engineering, Silesian University of Technology, 7 Towarowa Str. 44-100 Gliwice, Poland
  2. Joint Doctoral School, Silesian University of Technology, 2A Akademicka Str. 44-100 Gliwice, Poland

Experimental and Numerical Comparison of Lead-Free and Lead-Containing Brasses for Fixture Application

Grzegorz Radzioch Dariusz Bartocha Marcin Kondracki
Archives of Foundry Engineering | 2023 | vol. 23 | No 3 | 124-132 | DOI: 10.24425/afe.2023.146672
Keywords Lead-Free Brass ATD shrinkage simulation validation
Download PDF Download RIS Download Bibtex

Abstract

A comparative analysis of brasses alloys, namely lead-free CuZn (CB771) and lead containing CuZn (CB770), was conducted in this article. The results of the comparative analysis and experimental investigations aimed to provide comprehensive knowledge about the thermophysical properties and solidification characteristics of these alloys. Thermodynamic simulations using Thermo-Calc software and modifications in the chemical composition of the CB771 alloy were employed to approximate its characteristics to those of the lead containing CuZn alloy. Thermal-derivative analysis of the alloys and a technological trial were carried out to determine their solidification characteristics, fluidity, and reproducibility. The casting trials were conducted under identical conditions, and the results were compared for a comprehensive analysis. Additionally, a solidification process simulation was performed using MagmaSoft software to match the thermophysical properties. The aim of this research was to achieve maximum consistency between the simulation results and experimental investigations.
Go to article

Bibliography

[1] Zoghipour, N., Tascioglu, E., Celik, F. & Kaynak, Y. (2022) - The influence of edge radius and lead content on machining performance of brass alloys. Procedia CIRP. 112, 274-279. https://doi.org/10.1016/j.procir.2022.09.084 .
[2] Hansen, A. (2019). Bleifreier rotguss als armaturen-undinstallationswerkstoff in der trinkwasserinstallation. METALL Forschung. 73(11), 452-455.
[3] Stavroulakis, P., Toulfatzis, A., Pantazopoulos, G. & Paipetis, A. (2022). Machinable leaded and eco-friendly brass alloys for high performance manufacturing processes: a critical review. Metals. 12(2), 246, 1-31. https://doi.org/10.3390/met12020246.
[4] Schultheiss, F., Johansson, D., Bushlya, V., Zhou, J., Nilsson, K. & Ståhl, J-E. (2017). Comparative study on the machinability of lead-free brass. Journal of Cleaner Production. 149, 366-377. https://doi.org/10.1016/ j.jclepro.2017.02.098.
[5] Johansson, J., Alm, P., M’Saoubi, R., Malmberg, P., Ståhl, J-E. & Bushlya, V. (2022). On the function of lead (Pb) in machining brass alloys. Journal of Advanced Manufacturing Technology. 120, 7263-7275. https://doi.org/10.1007/s00170-022-09205-0.
[6] Acceptance of metallic materials used for products in contact with drinking water, 4MS Common Approach Part B “4MS Common Composition List” Retrieved July, 12, 2022 from http://www.umweltbundesamt.de/en/topics/water/drinking-water/distributing-drinking-water/guidelines-evaluation-criteria.
[7] Directive (EU) 2020/2184 of the European Parliament and of the Council of 16 December 2020 on the quality of water intended for human consumption, Dz.U.L 435/1 of 23.12.2020.
[8] Podrzucki, C. (1991). Cast iron. STOP. (in Polish).
[9] Cholewa, M., Suchoń, J., Kondracki, M. & Jura, Z. (2009). Method of thermal derivative gradient analysis (TDGA). Archives of Foundry Engineering. 9(4), 241-245. ISSN (1897-3310).
[10] Bruna, M. & Sladek, A. (2011). Hydrogen analysis and effect of filtration on final quality of castings from aluminium alloy AlSi7Mg0,3. Archives of Foundry Engineering. 11(1), 5-10.
[11] Ignaszak, Z. (2007). Validation problems of virtual prototyping systems used in foundry for technology optimization of ductile iron castings. Advances in Integrated Design and Manufacturing in Mechanical Engineering II, Springer, 57-79. https://doi.org/10.1007/978-1-4020-6761-7_4.
[12] Fajkiel, A., Dudek, P., Walczak, W. & Zawadzki, P. (2007). Improvement of quality of a gravity die casting made from aluminum bronze be application of numerical simulation. Archives of Foundry Engineering. 7(2), 11-14. ISSN (1897-3310).
[13] Persson, P-E., Ignaszak, Z., Fransson, H., Kropotkin, V., Andersson, R. & Kump, A. (2019). increasing precision and yield in casting production by simulation of the solidification process based on realistic material data evaluated from thermal analysis (Using the ATAS MetStar System). Archives of Foundry Engineering. 19(1), 117-126. DOI: 10.24425/afe.2019.127104.
[14] Ignaszak, Z. & Wojciechowski, J. (2020). Analysis and validation of database in computer aided design of jewellery casting. Archives of Foundry Engineering. 20(1), 9-16. DOI: 10.24425/afe.2020.131275.

Go to article

Authors and Affiliations

Grzegorz Radzioch
1 2
Dariusz Bartocha
1
ORCID: ORCID
Marcin Kondracki
1
ORCID: ORCID
  1. Department of Foundry Engineering, Silesian University of Technology, 7 Towarowa Str. 44-100 Gliwice, Poland
  2. Joint Doctoral School, Silesian University of Technology, 2A Akademicka Str. 44-100 Gliwice, Poland

This page uses 'cookies'. Learn more