Optimization of 3D Printed Patterns for the Hybrid Investment Casting Technology

• Autorzy: Štěpán R. , Krutiš V. , Jelínek R. , Petřík M.
• Języki publikacji: EN

Abstrakty

EN

Currently, great emphasis is placed on the production of castings with complex shapes. The hybrid investment casting technology using 3D printed models offers new possibilities in the production of such complex and thin-walled castings. The motivation for this paper was to find a solution to the problem with ceramic shells cracking during the 3D model firing stage. The main factors affecting the shell cracking are the thermal expansion of the model and the shell material, and the newly considered pressure of the gas closed in the ceramic shell cavity. First, thermal analyses were performed of a commercial material used for 3D printing - Polymaker PolyCast™. The characteristics yielded by the measurements helped establish the glass transition temperature, the autoignition temperature and the behaviour of the gas produced by the model burning. Suitable experimental models in the shape of tetrahedrons were designed and used for a number of experiments. The tests confirmed that cracks only occur during shock firing in models printed by the FFF technology with 0% of infill. A solution suggested for further experiments is purposeful venting of the models. Practical testing of the optimization has also been performed. The last step was measurement of the heat transfer through the ceramic shell after being placed in the annealing furnace. There were temperature evolution profiles in the system model-ceramic shell obtained.

Słowa kluczowe

EN

ceramic shell cracking; hybrid casting; investment casting; 3D printed model; FFF technology

PL

pękanie skorupy ceramicznej; technologia hybrydowa; odlewanie precyzyjne; model drukowany w 3D; technologia FFF

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2024
• Tom: Vol. 24, iss. 4
• Strony: 63--68
• Opis fizyczny: Bibliogr. 10 poz., il., wykr.

Twórcy

autor

Štěpán R.

• Brno University of Technology, Czech Republic

• https://orcid.org/0009-0002-6712-2320

autor

Krutiš V.

• Brno University of Technology, Czech Republic

autor

Jelínek R.

• Brno University of Technology, Czech Republic

• https://orcid.org/0009-0007-3235-2827

autor

Petřík M.

• Brno University of Technology, Czech Republic

Bibliografia

• [1] Pacific Kiln. (2020). Flash Fire Dewax System. Retrieved February 27, 2024, from https://www.pacifickiln.com/investment-casting-products/flash-fire-dewax-system/
• [2] Horáček, M. (2009). Dimensional accuracy of castings produced by the fusible model method. Brno: Brno University of Technology, Czech Republic. (in Czech).
• [3] Štěpán, R. (2022). Optimizing the properties of 3D printed models for ceramic shell casting technology. Brno: Diploma thesis, Brno University of Technology, Czech Republic. (in Czech).
• [4] Krutiš, V., Novosad, P., Záděra, A. & Kaňa, V. (2022). Requirements for hybrid technology enabling the production of high-precision thin-wall castings. Materials. 15(11), 3805, 1-13. https://doi.org/10.3390/ma15113805.
• [5] Fedorov, K., Fayazbakhsh, K. & Ravindran, C. Surface roughness and dimensional tolerances in A319 alloy samples produced by rapid investment casting process based on fused filament fabrication. International Journal of Advanced Manufacturing Technology. 119, 4423-4437. https://doi.org/10.1007/s00170-021-08644-5.
• [6] Kumar, P., Ahuja, I. S. & Singh, R. (2016). Effect of process parameters on surface roughness of hybrid investment casting. Progress in Additive Manufacturing. 1, 45-53. https://doi.org/10.1007/s40964-016-0004-9.
• [7] Chen, X., Li, D., Wu, H., Tang, Y. & Zhao, L. (2011). Analysis of ceramic shell cracking in stereolithography-based rapid casting of turbine blade. International Journal of Advanced Manufacturing Technology. 55, 447-455. https://doi.org/10.1007/s00170-010-3064-x.
• [8] Polymaker. (2024). Polymaker PolyCast Product Information Sheet. Retrieved February 27, 2024, from https://polymaker.com/product/polycast/
• [9] Polymer Science Learning Center. (2024). Differential Scanning Calorimetry. Retrieved February 27, 2024, from https://pslc.ws/macrog/level5.html .
• [10] Bednárik, M. (2021). Proposal to change the production of molded parts to the technology of casting into ceramic shells. Brno: Diploma thesis, Brno University of Technology, Brno University of Technology, Czech Republic. (in Czech).

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025)