Optimization of 3D Printed Patterns for the Hybrid Investment Casting Technology
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 pro...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2024-12-01
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| Series: | Archives of Foundry Engineering |
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| Online Access: | https://journals.pan.pl/Content/133702/AFE%204_2024_08.pdf |
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| author | R. Štěpán V. Krutiš R. Jelínek M. Petřík |
| author_facet | R. Štěpán V. Krutiš R. Jelínek M. Petřík |
| author_sort | R. Štěpán |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-00d03cfb05d447f5ab6dddd5c032783f |
| institution | Kabale University |
| issn | 2299-2944 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Foundry Engineering |
| spelling | doaj-art-00d03cfb05d447f5ab6dddd5c032783f2025-01-27T10:10:36ZengPolish Academy of SciencesArchives of Foundry Engineering2299-29442024-12-01vol. 24No 46368https://doi.org/10.24425/afe.2024.151311Optimization of 3D Printed Patterns for the Hybrid Investment Casting TechnologyR. Štěpán0https://orcid.org/0009-0002-6712-2320V. Krutiš1https://orcid.org/0000-0001-9642-8965R. Jelínek2https://orcid.org/0009-0007-3235-2827M. Petřík3https://orcid.org/0009-0005-9211-6071Brno University of Technology, Czech RepublicBrno University of Technology, Czech RepublicBrno University of Technology, Czech RepublicBrno University of Technology, Czech RepublicCurrently, 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.https://journals.pan.pl/Content/133702/AFE%204_2024_08.pdfceramic shell crackinghybrid investment casting technology3d printed modelfff technology |
| spellingShingle | R. Štěpán V. Krutiš R. Jelínek M. Petřík Optimization of 3D Printed Patterns for the Hybrid Investment Casting Technology Archives of Foundry Engineering ceramic shell cracking hybrid investment casting technology 3d printed model fff technology |
| title | Optimization of 3D Printed Patterns for the Hybrid Investment Casting Technology |
| title_full | Optimization of 3D Printed Patterns for the Hybrid Investment Casting Technology |
| title_fullStr | Optimization of 3D Printed Patterns for the Hybrid Investment Casting Technology |
| title_full_unstemmed | Optimization of 3D Printed Patterns for the Hybrid Investment Casting Technology |
| title_short | Optimization of 3D Printed Patterns for the Hybrid Investment Casting Technology |
| title_sort | optimization of 3d printed patterns for the hybrid investment casting technology |
| topic | ceramic shell cracking hybrid investment casting technology 3d printed model fff technology |
| url | https://journals.pan.pl/Content/133702/AFE%204_2024_08.pdf |
| work_keys_str_mv | AT rstepan optimizationof3dprintedpatternsforthehybridinvestmentcastingtechnology AT vkrutis optimizationof3dprintedpatternsforthehybridinvestmentcastingtechnology AT rjelinek optimizationof3dprintedpatternsforthehybridinvestmentcastingtechnology AT mpetrik optimizationof3dprintedpatternsforthehybridinvestmentcastingtechnology |