噴墨技術在軟性顯示器或半導體製程領域的應用潛能很大也很重要,如何設計出符合要求的噴墨系統成為決定優劣的關鍵。本研究結合流體動力分析軟體FLOW-3D與自適應微分演化演算法建構出一套噴墨頭最佳壓力驅動設定以及噴嘴形狀最佳設計。目的是為了找出最佳噴墨壓力源操作參數和最佳化的噴嘴形狀設計,讓噴墨系統有較佳的效能。研究目標是設計驅動壓力及噴嘴形狀符合噴射液滴集中性,減少衛星液滴的濺射,液滴飛行速度快、液滴體積小、壓力循環週期短等要求,以提升噴墨製程品質。由研究結果得知,在產品設計限制的條件下,利用FLOW-3D與自適應微分演化演算法所建構出來的最佳化設計程式搜尋適當的壓力驅動設定及最佳噴嘴形狀,達到良好液滴噴射行為以符合設計目標。
Inject printing is an important technique with high potential in applications of flat-panel display or semiconductor industry. The design of inject printing system is the key for successful applications. In this study optimization of shape of piezoelectric micro-droplet nozzle in consideration of cycle setting of pressure source is investigated by integration of commercial program FLOW-3D with self-adaptive differential evolution (SADE) algorithm. The objective is to apply the optimization technique in designing the shape of nozzle and cycle of pressure source for obtaining the droplet fitting the desired properties such as centralization、 velocity、 volume、 short pressure cycle and no satellite droplet. From of results of this study, the developed program combining Flow-3D simulation and SADE optimization can find optimum shape of nozzle and pressure source cycle setting with desired droplet behavior under the constraints of design requirements.