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研究生:白硯方
研究生(外文):Yen-FangPai
論文名稱:壓電噴墨技術中單脈衝波形之脈衝時間對液滴行為影響之研究
論文名稱(外文):The Investigation of Pulse Time for Single Pulse Waveform on Droplet Behaviors in Piezoelectric Ink-jet Printing
指導教授:黃文星黃文星引用關係
指導教授(外文):Weng-Sing Hwang
學位類別:碩士
校院名稱:國立成功大學
系所名稱:材料科學及工程學系碩博士班
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:63
中文關鍵詞:壓電噴墨單脈衝脈衝時間液滴體積液滴飛行速度
外文關鍵詞:piezoelectric inkjet printingunipolar waveformpulse timedroplet velocitydroplet volume
相關次數:
  • 被引用被引用:3
  • 點閱點閱:408
  • 評分評分:
  • 下載下載:101
  • 收藏至我的研究室書目清單書目收藏:0
壓電噴墨系統可以透過電腦輔助控制直接進行參數的調整,受到不同噴墨參數如:波形、電壓和頻率等所影響,會有不同的微液滴行為。為了改善製程速度及噴印品質,各種影響噴墨過程的參數皆需要得到適當的控制。
本研究使用FLOW-3D®套裝軟體進行數值模擬並結合實驗驗證,針對單脈衝波形中的脈衝時間TRise、TDwell、TFall進行研究,探討TRise、TDwell與TFall對噴墨管中壓力波、液滴飛行速度及液滴體積的影響。
由研究結果發現,隨著TRise、TFall(=2~16 μs)的增加,液滴飛行速度和液滴體積皆與TRise、TFall呈現線性關係;TFall的增加,使得液滴飛行速度有較大的上升趨勢,TRise的增加,使得液滴體積有較大的上升趨勢。
透過實驗和數值模擬系統的比對,得到符合實際噴墨管的最佳波寬時間(Optimum Pulse Width),代入最佳波寬時間後,分別可以在噴嘴端得到最大正壓力值,以及得到最大液滴飛行速度。
Inkjet printing technology has been widely used in many applications. Piezoelectric inkjet printing system could be directly modulated by computer control. Behaviors of droplet are affected by various parameters, such as: driving waveform, pulse voltage and frequency. In order to improve the processing throughput and printing quality, the droplet stability and speed need to be well controlled.
This study presents numerical analysis and experiment results of droplet formation process in squeeze-mode piezoelectric inkjet printhead. The effects of different pulse time on droplet formation and droplet velocity in unipolar waveform were investigated.
The results show that droplet velocity and droplet volume both increased with increasing TRise or TFall. Comparing the different contribution of each parameter, the droplet volume is more sensitive to TRise than that in TFall. In addition, TFall has much more impact on the speed of the droplet than TRise.
Through the numerical simulation results and experimental verification, the optimum pulse width of piezoelectric inkjet tube could be obtained.. Under the optimum pulse width, the droplet velocity and pressure wave can both reach the maximum value.
摘要 I
Abstract II
誌謝 III
目錄 IV
表目錄 VI
圖目錄 VII
符號對照表 IX
第一章 前言 1
1.1 研究背景 1
1.2 文獻回顧 1
1.2.1 噴墨製程技術 1
1.2.2 壓電噴墨技術之實驗與理論 4
1.2.3 壓電噴墨技術之應用 6
1.3 研究目的 7
第二章 理論基礎 15
2.1 控制方程式 15
2.2 自由表面 16
2.3 邊界條件 17
2.3.1 自由表面邊界 17
2.3.2 固體邊牆邊界 17
2.4 壓電噴墨原理 18
2.5 壓電噴墨波形參數 18
第三章 實驗方法 23
3.1 實驗設備 23
3.1.1 壓電噴墨設備 23
3.1.2 微液滴觀測分析 24
3.2 實驗步驟 24
3.3 數值模擬系統設定 25
第四章 結果與討論 32
4.1 液滴行為之模擬結果與實驗驗證 32
4.2 脈衝時間對液滴行為之影響分析 32
4.2.1 脈衝時間TRise對液滴行為影響之模擬和實驗結果分析 33
4.2.2 脈衝時間TDwell對液滴行為影響之模擬和實驗結果分析 33
4.2.3 脈衝時間TFall對液滴行為影響之模擬和實驗結果分析 35
4.3 脈衝時間對液滴影響之趨勢比較 37
第五章 結論 58
參考文獻 59
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