Strength Improvement of CFRTP by Mixing Long and Short Fibers
長・短繊維混合による射出成形CFRTPの強度向上
- Delivery
- Available on the other site
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- Publication code
- 20254052
- Paper/Info type
- JSAE Transaction
Vol.56 No.1
- Pages
- 165-170(Total 6 p)
- Date of publication
- Jan 2025
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 論文 Translation |
|---|---|
| Category(E) | Paper |
| Author(J) | 1) 濱田 陸奥樹, 2) 梅津 太一, 3) 西野 創一郎, 4) 早乙女 秀丸 |
| Author(E) | 1) Mutsuki Hamada, 2) Taichi Umedu, 3) Soichiro Nishino, 4) Hidemaru Sootome |
| Affiliation(J) | 1) 茨城大学大学院, 2) 茨城大学大学院, 3) 茨城大学大学院, 4) 茨城県産業技術イノベーションセンター |
| Abstract(J) | CFRTPの射出成形金型の摩耗抑制を目的として，繊維長の異なる長繊維ペレットと短繊維ペレットを混合して，CF含有率を下げて強度を維持することに成功した．強度向上の要因は，ボイド等の欠陥の発生を抑制しつつCF分布を均一にできたことと，短繊維に加えて長繊維を混合することで試験片内部の繊維長が長くなることである． Translation |
| Abstract(E) | In this study, we attempted to reduce mold wear in CFRTP injection molding by mixing long and short fiber pellets with different fiber lengths to reduce CF content and maintain strength. In addition, the internal structure of the molded specimens was visualized using CT scans to clarify the relationship between internal molding defects, CF distribution and orientation, CF length, and tensile strength. Tensile strength increased with increasing CF content in 100% short fiber. For 100% long fibers, the strength increased with CF content from 10wt% to 15wt%, but the strength decreased at 20wt% from 10wt%. At content rates of 10, 15, and 20 wt%, internal defects (voids) and uneven distribution of CF occur in long-fiber CFRTP at a content rate of 20 wt%, resulting in a decrease in strength. No internal defects or uneven CF distribution were observed in the short-fiber CFRTP at any content rate. By mixing 50wt% long-fiber pellets and 50wt% short-fiber pellets in the molding process, the same tensile strength as that of 100% short-fiber pellets with a CF content of 20wt% could be secured at a CF content of 15wt%. Therefore, it was clear that mixing pellets can reduce CF content and ensure strength. Factors that contributed to the maintenance of strength by pellet blending were that the CF distribution became uniform while suppressing the generation of defects such as voids, and that the fiber length inside the specimen became longer by mixing long fibers in addition to short fibers. |
