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研究生:古仲凡
研究生(外文):Jung-Fan Ku
論文名稱:陶瓷積層製造之漿料狹縫披覆器研究
論文名稱(外文):Study on slurry slot coater in additive manufacturing of ceramics
指導教授:嚴孝全
口試委員:孫殷同、施議訓
口試日期:2016-07-18
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:製造科技研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2016
畢業學年度:104
語文別:中文
中文關鍵詞:積層製造、漿料狹縫披覆器、模擬分析
外文關鍵詞:Additive manufacturingSlurry slot coaterSimulation analysis
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陶瓷材料具有許多良好的機械性質,但硬脆的特性也導致其成型性不佳,較不易製作複雜外型的工件。陶瓷積層製造則改善現有陶瓷製作技術的缺點,可以製作複雜外型的陶瓷產品。現有之漿料法陶瓷積層製造可以鋪設較粉末法更薄的鋪層,改善積層製造的階梯現象。舊有的漿料披覆器漿料分配不均勻,鋪層含水量分佈不均勻導致鋪層的乾燥時間不一,亦為其缺點之一。
本研究的目的是透過研究具有衣架形流道之狹縫披覆器的狹縫寬度、流道分配角與漿料黏度之間的關係得到適當之披覆器,改善以往生胚鋪層濕度不均的問題。首先以Flow-3D軟體進行模流分析;藉由輸入相關參數,模擬漿料在狹縫流動,找出適用的衣架形流道的角度。最後依照模擬結果選擇適用之參數,製作實體披覆器進行漿料分佈實驗及漿料鋪層實驗,以驗證模擬之結果。實驗數據將以ANOVA進行分析,以解釋實驗中各因子的影響。
實驗結果顯示,模擬結果相當可靠,透過模擬所得之流道分配角,確實可以持續地將定量之漿料均勻地送達披覆器出口而得到均勻的鋪層。不同的陶瓷漿料亦可循類似的方法快速地建構所需之漿料披覆器。
Ceramics have many excellent mechanical properties. But the ceramics are hard and brittle, which result in difficulty of forming and fabricating workpiece with complex shape. Ceramic additive manufacturing improves the drawbacks of the existing ceramic manufacturing processes. It can fabricate the complex ceramic components. The existing slurry-based additive manufacturing of ceramic can cast thinner layer than the layer casted with the powder-based processes to improve the step effect. Original slurry coater had the problem of un-uniform slurry distribution. Un-uniform distribution of water containing of the layer lead to the un-uniform time-taken of the layer drying was one of the disadvantages.
The aim of this study is to achieve a proper coater to improve the aforementioned disadvantage through studying the relations of viscosity, slot width, distribution angle of the flow channel of the slot coater. Firstly, mold flow simulation was carried out by Flow-3D. The slurry behavior in the slot coater was simulated with related parameters to find the desirable distribution angle of the flow channel. Eventually, based on the experimental results, the physical coaters were fabricated to conduct slurry distribution and casting experiment, to verify simulation results. Experiment data was analyzed by ANOVA to explain the effect of experimental factor.
The results revealed that, the simulation results is reliable. The quantitative slurry could be uniformly delivered to the outlet of the coater to achieve a perfect layer by a proper distribution angle obtained by the simulation. The same method can be employed to rapidly construct the coater for different ceramic slurry.
目錄
摘 要 i
ABSTRACT ii
誌謝 iv
目錄 v
表目錄 viii
圖目錄 ix
第一章 緒論 1
1.1 前言 1
1.2 研究背景 1
1.3 研究目的 2
1.4 研究方法 2
1.5 論文架構 3
第二章 文獻回顧 4
2.1 積層製造加工原理 4
2.2 積層製造技術介紹 5
2.2.1 光固化立體造型(Stereolithography, SL) 6
2.2.2 三維列印法(Three Dimensional Printing, 3DP) 7
2.2.3 層片疊加製造(Laminated Object Manufacturing, LOM) 7
2.2.4 熔融沉積造型(Fused Deposition Modeling, FDM) 8
2.2.5 選擇性雷射燒結(Selective Laser Sintering, SLS) 8
2.2.6 濕式陶瓷雷射法製造 9
2.3 狹縫式塗佈相關技術 10
2.4 狹縫漿料披覆簡介 14
第三章 實驗方法 18
3.1 實驗材料 18
3.2 實驗儀器 21
3.3 漿料調配及物理性質量測 23
3.3.1 漿料調配 23
3.3.2 黏度量測 25
3.3.3 接觸角及表面張力量測 25
3.4 模擬分析 26
3.4.1 Flow-3D簡介 26
3.4.2 建模與設定 28
3.5 實際驗證 32
3.5.1 披器實體之加工 32
3.5.2 流體分佈均勻性實驗 34
3.5.3 漿料鋪層實驗 36
3.6 披覆器組裝方式改良 37
第四章 結果與討論 38
4.1 漿料物理性質量測 38
4.1.1 黏度量測 38
4.1.2 接觸角及表面張力量測 39
4.2 模擬分析結果 40
4.2.1 不同披覆器設計參數之流線分佈 40
4.3 實際驗證結果與比較 44
4.3.1 不同漿料之實際驗證結果 44
4.3.2 模擬結果與實際驗證結果之比較 48
4.4 漿料鋪層實驗 49
4.5 各參數之影響 52
4.5.1 流道角之影響 52
4.5.2 狹縫寬度之影響 53
4.5.3 漿料黏度之影響 54
4.6 披覆器組裝方式改良結果 54
第五章 結論與未來展望 57
5.1 結論 57
5.2 未來展望 58
參考文獻 59
附錄 62
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