Flow-induced fiber orientation in gas-powered projectile-assisted injection molded parts
A preliminary and groundbreaking study on the fiber orientation pattern in gas-powered projectile-assisted injection molding (G-PAIM) part of short-glass-fiber-reinforced polypropylene was reported, the results showed that the fiber orientation pattern across the thickness of G-PAIM part was remarka...
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| Language: | English |
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De Gruyter
2025-01-01
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| Series: | e-Polymers |
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| Online Access: | https://doi.org/10.1515/epoly-2024-0093 |
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| author | Zhang Wei Wu Jun-wei Kuang Tang-Qing Liu He-Sheng |
| author_facet | Zhang Wei Wu Jun-wei Kuang Tang-Qing Liu He-Sheng |
| author_sort | Zhang Wei |
| collection | DOAJ |
| description | A preliminary and groundbreaking study on the fiber orientation pattern in gas-powered projectile-assisted injection molding (G-PAIM) part of short-glass-fiber-reinforced polypropylene was reported, the results showed that the fiber orientation pattern across the thickness of G-PAIM part was remarkably different from that in the parts molded via gas-assisted injection molding (GAIM) and conventional injection molding (CIM) as reported earlier, and the difference of fiber orientation pattern between G-PAIM, GAIM, and CIM parts was mainly due to the unique flow fields generated by projectile penetration. Additionally, fiber orientation states within the G-PAIM part depended not only on their positions both across the part thickness and along the flow direction, but also on the processing parameters. Particularly along the thickness direction, fiber orientation states changed significantly. The results also showed that gas injection delay time was the main factor affecting the fiber orientation states within the G-PAIM part, and a shorter gas injection delay time could remarkably induce more ordered fiber orientation along the melt direction. Within the range of the investigated processing parameter values, a larger ordered region, where most fibers tended to be orderly oriented along the melt flow direction, could be obtained under a larger gas pressure (8 MPa), higher melt temperature (250°C), and shorter gas injection delay time (1 s). This work provides a comprehensive guidance for the fabrication practice of G-PAIM parts of short fiber-reinforced thermoplastics. |
| format | Article |
| id | doaj-art-9e737001e558416ebdc26462739192c9 |
| institution | Kabale University |
| issn | 1618-7229 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | e-Polymers |
| spelling | doaj-art-9e737001e558416ebdc26462739192c92025-02-02T15:45:27ZengDe Gruytere-Polymers1618-72292025-01-0125119851510.1515/epoly-2024-0093Flow-induced fiber orientation in gas-powered projectile-assisted injection molded partsZhang Wei0Wu Jun-wei1Kuang Tang-Qing2Liu He-Sheng3Postdoctoral Station of Transportation Engineering, State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiao Tong University, Nanchang, 330013, ChinaState Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiao Tong University, Nanchang, 330013, ChinaState Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiao Tong University, Nanchang, 330013, ChinaState Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiao Tong University, Nanchang, 330013, ChinaA preliminary and groundbreaking study on the fiber orientation pattern in gas-powered projectile-assisted injection molding (G-PAIM) part of short-glass-fiber-reinforced polypropylene was reported, the results showed that the fiber orientation pattern across the thickness of G-PAIM part was remarkably different from that in the parts molded via gas-assisted injection molding (GAIM) and conventional injection molding (CIM) as reported earlier, and the difference of fiber orientation pattern between G-PAIM, GAIM, and CIM parts was mainly due to the unique flow fields generated by projectile penetration. Additionally, fiber orientation states within the G-PAIM part depended not only on their positions both across the part thickness and along the flow direction, but also on the processing parameters. Particularly along the thickness direction, fiber orientation states changed significantly. The results also showed that gas injection delay time was the main factor affecting the fiber orientation states within the G-PAIM part, and a shorter gas injection delay time could remarkably induce more ordered fiber orientation along the melt direction. Within the range of the investigated processing parameter values, a larger ordered region, where most fibers tended to be orderly oriented along the melt flow direction, could be obtained under a larger gas pressure (8 MPa), higher melt temperature (250°C), and shorter gas injection delay time (1 s). This work provides a comprehensive guidance for the fabrication practice of G-PAIM parts of short fiber-reinforced thermoplastics.https://doi.org/10.1515/epoly-2024-0093gas-powered projectile-assisted injection moldingfiber orientationprocessing parameterspolymer compositesflow filed |
| spellingShingle | Zhang Wei Wu Jun-wei Kuang Tang-Qing Liu He-Sheng Flow-induced fiber orientation in gas-powered projectile-assisted injection molded parts e-Polymers gas-powered projectile-assisted injection molding fiber orientation processing parameters polymer composites flow filed |
| title | Flow-induced fiber orientation in gas-powered projectile-assisted injection molded parts |
| title_full | Flow-induced fiber orientation in gas-powered projectile-assisted injection molded parts |
| title_fullStr | Flow-induced fiber orientation in gas-powered projectile-assisted injection molded parts |
| title_full_unstemmed | Flow-induced fiber orientation in gas-powered projectile-assisted injection molded parts |
| title_short | Flow-induced fiber orientation in gas-powered projectile-assisted injection molded parts |
| title_sort | flow induced fiber orientation in gas powered projectile assisted injection molded parts |
| topic | gas-powered projectile-assisted injection molding fiber orientation processing parameters polymer composites flow filed |
| url | https://doi.org/10.1515/epoly-2024-0093 |
| work_keys_str_mv | AT zhangwei flowinducedfiberorientationingaspoweredprojectileassistedinjectionmoldedparts AT wujunwei flowinducedfiberorientationingaspoweredprojectileassistedinjectionmoldedparts AT kuangtangqing flowinducedfiberorientationingaspoweredprojectileassistedinjectionmoldedparts AT liuhesheng flowinducedfiberorientationingaspoweredprojectileassistedinjectionmoldedparts |