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題 名 | Investigations on the Bending Properties of Gas-Assisted Injection Molded Polystyrene Parts=PS材質氣體輔助射出成型品抗彎性質之研究 |
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作 者 | 簡仁德; 陳俊生; 鍾藏棟; 梁龍驥; | 書刊名 | 南亞學報 |
卷 期 | 18 1998.07[民87.07] |
頁 次 | 頁11-29 |
分類號 | 440.23 |
關鍵詞 | PS材質; 氣體輔助射出成型品; 抗彎性質; |
語 文 | 英文(English) |
中文摘要 | 本研究係針對不同氣道形狀設計與不同成型條件所導致之幾何形狀因素對PS材質氣體輔助射出成型品之機械性質的影響經由抗彎試驗來作研究。試驗結果並與傳統射出成型品做一比較。結果發現氣體輔助射出成型品較之於傳統射出成型品有較佳之撓曲強度。並且氣道之設計將導入額外慣性矩而達結構強化效果,而其值取決於氣道幾何形狀以及中空之大小和幾何分佈。氣體輔助射出成型品之機械強度基本上隨氣道尺寸之增加而增大,但成型條件則影響不大。在相同慣性矩下,氣體輔助射出成型品較傳統射出成型品有較高出約25%之勁度。同時,氣體輔助射出成型品之勁度與最大抗彎負荷分別正比於慣性矩與斷面模數。經由本研究之試驗結果可提供氣體輔助射出成型品零件設計者一氣道設計準則並以為依據。 |
英文摘要 | Effects of geometrical factors introduced by various gas channel design and molding conditions on the mechanical properties of gas-assisted injection molded polystyrene (PS) parts were investigated via bending test. Testing results are also compared with those of conventional injection molded (CIM) parts. It was found that gas-assisted injection molded (GAIM) parts show better fiexural strength than those of CIM parts. Gas channel design, introducing additional moment of inertia whose value was determined by the geometry of channel section and the associated hollowed core, results in part structural reinforcement. Mechanical strength of GAIM parts basically increases when the size of the hollowed gas channel is increased but shows only slight influence from molding conditions. For the same moment of inertia, GAIM parts show approximately 25% higher stiffness values than those of CIM parts. Meanwhile, bending stiffness and maximum bending load for GAIM parts are proportional to the inertia moment and the section modulus of the parts, respectively. The measured data provide part designers a design guideline for helping cost and process evaluation under the same objective of part structural performance when choosing conventional injection molding and gas-assisted injection molding as a production technique. |
本系統中英文摘要資訊取自各篇刊載內容。