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題 名 | 以田口式實驗計畫法分析PU+金雲母材質應用於射出成型加工之製程研究=Feasible Analysis on the Manufactural Process for PU+ Phlogopite Bumper by the Taguchi Method |
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作 者 | 陳榮盛; 陳界文; 梁智翔; | 書刊名 | 力學 |
卷 期 | 12:2 1996.06[民85.06] |
頁 次 | 頁243-253 |
分類號 | 467.41 |
關鍵詞 | 聚胺基甲酸乙酯; 雲母鱗片; 田口式品質實驗計畫法; 射出成型; Polyurethane; Phlogopite; Taguchi method; Injection mold; |
語 文 | 中文(Chinese) |
中文摘要 | 本文係考慮在熱塑性聚胺基甲酸乙酯(Thermoplastic Polyurethane, TPU)中加入 不同含量之雲母鱗片 (5%, 10%, 20%),利用押出機以擠出法進行混合, 並將混合所得之材 質進行各項材料試驗, 如 DSC (Differential Scanning Calorimeter) 之熱差分析試驗、 壓力 - 比容 - 溫度 (PVT) 關係之試驗及毛細管流變試驗, 以建立 C-MOLD 射出套裝軟體 所需之資料庫。 並選用添加 5% 雲母鱗片之聚胺基甲酸乙酯為汽車保險桿之材質, 配合 C-MOLD 軟體並輔以田口式 (Taguchi Method) 品質實驗計劃法中之 L18 直交法,以減少成 型品平均收縮率為目標,實際模擬汽車保險桿實體,探討射出成型較佳之製程條件之設定。 從材料基本性質及量測得知:(1) DSC 試驗,TPU 材質之玻璃轉換溫度為 120 ℃, 且 TPU 之玻璃轉換溫度,均不會隨雲母含量的不同而有所差異。但隨著雲母含量的增加,TPU 之比 熱卻呈現減少現象。(2) P-V-T 試驗中在同一壓力下,比容隨溫度昇高而增大。而在同一溫 度下,比容隨壓力增加而減少。TPU 在同一溫度、壓力下時,比容會隨著雲母含量的增加而 減少。(3) 毛細管流變試驗,當雲母含量增加時,熔融聚合體之黏度隨雲母含量增加而提高 。 由田口式品質實驗計劃法找出之最適成型條件,經由 C-MOLD 射出套裝軟體模擬後發現, 保壓壓力對降低保險桿成型品平均收縮率之貢獻率最大,而保壓時間與冷卻水溫度則為影響 次強的因素。經確認實驗後,得知成型品之平均收縮率約為 4.7%,且經望小特性 S/N 比轉 換後,獲得最適製程實際模擬之 S/N 比值為 -13.44 dB,與預測值 -13.41 dB 相當接近、 故可驗證所選取的控制因子之間交互作用非常小,其品質特性(成型品收縮率)具有良好的 可加性。 |
英文摘要 | Thermoplastic Polyurethane, TPU was mixed with Phlogopite of various content (5%, 10%, 20%) via extrusion. The properties of mixed material was then measured by tests including the DSC (Differential Scanning Calorimeter) test, PVT test and Capillary Pheometer test to establish the data base required for the C-MOLD injection shoftware. The TPU with Phlogopite of 5% content was adopted as the material for bumper in which the C-MOLD software and the L18 Orthogonal Arrays of the Taguchi method were applied to simulate the real bumper so as to obtain a better manufacture process for bumper. Based on the material experiment, it was found: (1) For DSC test, the glass transition temperation of TPU material is 120 ℃, which is indenpendent of the content of Phlogopite. Thus the specific capacity of TPU does decrease with the increase of Phlogopite content. (2) For PVT test, the specific volume increases with the increase of temperature when the pressure keeps constant, while the specific volume decreases with the increase of pressure when temperature keeps constant. Thus specific volume decreases with the icnrease of Phlogopite content when temperature and pressure keep constant. (3) For Capillary Pheometer test, the viscosity of melt polymer increase with the increase of Phlogopite. The optimal manufacturer conditions obtained by the Tanuchi method was simulated through C-MOLD software. It was found that the packing pressure significantly affects the volumetric shrinkage while the packing time and the temperature of colling water are secondary factors. It was also found the average valumetric shrinkage rate of the bumper simulation is about 4.7%, and the S/N ratio is 13.44 dB which closely approximates to the predicted value of 13.41 dB. It indicates the interaction among selected control factors is not obvious and the quality property (volumetric shrinkage of bumper) is additive. |
本系統中英文摘要資訊取自各篇刊載內容。