Experimental Validation of a Micro-Extrusion Set-Up with In-Line Rheometry for the Production and Monitoring of Filaments for 3D-Printing
The main objective of this work is to validate an in-line micro-slit rheometer and a micro-extrusion line, both designed for the in-line monitoring and production of filaments for 3D printing using small amounts of material. The micro-filament extrusion line is first presented and its operational wi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/14/8/1496 |
| _version_ | 1797583868444803072 |
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| author | João Sousa Paulo F. Teixeira Loïc Hilliou José A. Covas |
| author_facet | João Sousa Paulo F. Teixeira Loïc Hilliou José A. Covas |
| author_sort | João Sousa |
| collection | DOAJ |
| description | The main objective of this work is to validate an in-line micro-slit rheometer and a micro-extrusion line, both designed for the in-line monitoring and production of filaments for 3D printing using small amounts of material. The micro-filament extrusion line is first presented and its operational window is assessed. The throughputs ranged between 0.045 kg/h and 0.15 kg/h with a maximum 3% error and with a melt temperature control within 1 °C under the processing conditions tested for an average residence time of about 3 min. The rheological micro slit is then presented and assessed using low-density polyethylene (LDPE) and cyclic olefin copolymer (COC). The excellent matching between the in-line micro-rheological data and the data measured with off-line rotational and capillary rheometers validate the in-line micro-slit rheometer. However, it is shown that the COC does not follow the Cox–Merz rule. The COC filaments produced with the micro-extrusion line were successfully used in the 3D printing of specimens for tensile testing. The quality of both filaments (less than 6% variation in diameter along the filament’s length) and printed specimens validated the whole micro-set-up, which was eventually used to deliver a rheological mapping of COC printability. |
| first_indexed | 2024-03-10T23:44:10Z |
| format | Article |
| id | doaj.art-f787c20f82164f078b5ddf036f02ba64 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T23:44:10Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-f787c20f82164f078b5ddf036f02ba642023-11-19T02:12:26ZengMDPI AGMicromachines2072-666X2023-07-01148149610.3390/mi14081496Experimental Validation of a Micro-Extrusion Set-Up with In-Line Rheometry for the Production and Monitoring of Filaments for 3D-PrintingJoão Sousa0Paulo F. Teixeira1Loïc Hilliou2José A. Covas3Institute for Polymers and Composites, University of Minho, 4800-058 Guimarães, PortugalInstitute for Polymers and Composites, University of Minho, 4800-058 Guimarães, PortugalInstitute for Polymers and Composites, University of Minho, 4800-058 Guimarães, PortugalInstitute for Polymers and Composites, University of Minho, 4800-058 Guimarães, PortugalThe main objective of this work is to validate an in-line micro-slit rheometer and a micro-extrusion line, both designed for the in-line monitoring and production of filaments for 3D printing using small amounts of material. The micro-filament extrusion line is first presented and its operational window is assessed. The throughputs ranged between 0.045 kg/h and 0.15 kg/h with a maximum 3% error and with a melt temperature control within 1 °C under the processing conditions tested for an average residence time of about 3 min. The rheological micro slit is then presented and assessed using low-density polyethylene (LDPE) and cyclic olefin copolymer (COC). The excellent matching between the in-line micro-rheological data and the data measured with off-line rotational and capillary rheometers validate the in-line micro-slit rheometer. However, it is shown that the COC does not follow the Cox–Merz rule. The COC filaments produced with the micro-extrusion line were successfully used in the 3D printing of specimens for tensile testing. The quality of both filaments (less than 6% variation in diameter along the filament’s length) and printed specimens validated the whole micro-set-up, which was eventually used to deliver a rheological mapping of COC printability.https://www.mdpi.com/2072-666X/14/8/1496micro-extrusionslit rheometer3D printingcyclic olefin copolymer |
| spellingShingle | João Sousa Paulo F. Teixeira Loïc Hilliou José A. Covas Experimental Validation of a Micro-Extrusion Set-Up with In-Line Rheometry for the Production and Monitoring of Filaments for 3D-Printing Micromachines micro-extrusion slit rheometer 3D printing cyclic olefin copolymer |
| title | Experimental Validation of a Micro-Extrusion Set-Up with In-Line Rheometry for the Production and Monitoring of Filaments for 3D-Printing |
| title_full | Experimental Validation of a Micro-Extrusion Set-Up with In-Line Rheometry for the Production and Monitoring of Filaments for 3D-Printing |
| title_fullStr | Experimental Validation of a Micro-Extrusion Set-Up with In-Line Rheometry for the Production and Monitoring of Filaments for 3D-Printing |
| title_full_unstemmed | Experimental Validation of a Micro-Extrusion Set-Up with In-Line Rheometry for the Production and Monitoring of Filaments for 3D-Printing |
| title_short | Experimental Validation of a Micro-Extrusion Set-Up with In-Line Rheometry for the Production and Monitoring of Filaments for 3D-Printing |
| title_sort | experimental validation of a micro extrusion set up with in line rheometry for the production and monitoring of filaments for 3d printing |
| topic | micro-extrusion slit rheometer 3D printing cyclic olefin copolymer |
| url | https://www.mdpi.com/2072-666X/14/8/1496 |
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