https://scholars.lib.ntu.edu.tw/handle/123456789/448207
標題: | Injection molding of plastic plates combined with boss features on superplastic Zn-22Al sheet | 作者: | Yang, S.Y. Parng, S.H. SEN-YEU YANG |
公開日期: | 2001 | 卷: | 16 | 期: | 4 | 起(迄)頁: | 412-420 | 來源出版物: | International Polymer Processing | 摘要: | This paper presents the development of a hybrid process combining forming of a superplastic zinc-aluminum sheet with injection molding. The product is a plastic part covered with a superplastic zinc-aluminum layer used mainly for electromagnetic interference (EMI) shielding. This paper investigates the moldability of Zn/Al sheet covered plates with various bosses. The effects on the moldability of various parameters, including: melt temperature, injection pressure, sheet thickness, various boss shapes and boss location in the mold, are investigated. It is found that bosses formed with thick Zn/Al sheet and located close to melt entrance exhibit good moldability. Among boss geometries, boss depth is the most critical parameter; a little increase in boss depth sharply lowers the mold-ability. Large angle improves moldability. To help interpret the effects of geometrical parameters, sheet deformation is observed by measuring the deformations in printed-grids and thickness. The base circle of the boss is found to be the most severely deformed region. The thickness reduction ratio in the center of base circle could help predicting moldability. © 2001 Walter de Gruyter GmbH, Berlin/Boston, Germany. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/448207 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126520064&doi=10.1515%2fipp-2001-0013&partnerID=40&md5=d1d55356fc673ff5e1f596e0d87282c6 |
ISSN: | 0930777X | DOI: | 10.3139/217.1666 | SDG/關鍵字: | Aluminum alloys; Binary alloys; Deformation; Electromagnetic pulse; Geometry; Injection molding; Plastic parts; Zinc alloys; Aluminum layers; Electromagnetic interference shielding; Hybrid process; Melt temperature; Moldability; Plastic plates; Plastics parts; Zinc aluminiums; Zinc-aluminum; Zn-22Al; Molds |
顯示於: | 機械工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。