快速取得雙面模具樹脂轉注成型之管路佈置方法

雙面模具樹脂轉注成型常用之輕質樹脂轉注成型(light resin transfer molding，LRTM)製程可應用在造船、離岸風電、軌道車輛、航太與汽車產業中，是未來相當倚重的製程技術之一。LRTM製程在模具設計階段就必須決定好樹脂流道與真空抽氣點位置，一旦開模後就無法修改，若流道位置錯誤，輕則影響製程效率，重則使無法成功灌注。樹脂流道位置與模具內纖維的孔隙率與滲透能力有絕對關係，但是纖維布在雙面模具內的孔隙率在未開模前並不易評估，因此本研究旨在解決LRTM製程中的管路佈置問題，首先利用材料微結構分析軟體GeoDict，搭配多軸向纖維布的技術資料表(technical data sheet，TDS)及試片斷層掃描(CT-Scan)結果來繪製纖維布的三維結構，獲得纖維布在模具間的孔隙並預估樹脂在孔隙間流動的滲透率參數，有了滲透率與孔隙率等模流分析參數後，便可使用模流分析軟體Moldex3D預估樹脂的流動波前，並與實驗結果比對確認本研究所用之預估方法是否正確無誤。經過實際的產品灌注與模流分析證實，使用本研究所提出之方法所獲得的孔隙率與滲透率可正確模擬樹脂的流動軌跡，後續LRTM在產品開發設計階段可以利用本研究所提出之方法決定模具中樹脂流道與真空抽氣點位置。

Light Resin Transfer Molding (LRTM) is widely utilized in shipbuilding, offshore wind energy, rolling stock, aviation, and automotive industries. Resin flow channels and vacuum evacuation points should be decided in the LRTM mold design phase. Inappropriate resin channel arrangements can hinder efficiency and lead to unsuccessful resin infusion. Resin flow channel arrangement directly affects glass fiber porosity and permeability in the LRTM mold, posing a challenge to evaluate before mold fabrication. This study focuses on resin pipe arrangements in the LRTM process. The methodology involves using GeoDict for material microstructure analysis, combining it with technical data sheets (TDS) for multi-axial glass fabrics and CT-Scan results to create a 3D representation of glass fabrics within the mold. This approach provides data on glass fabric porosity and estimated permeability parameters. Parameters obtained, such as permeability and porosity, are input into Moldex3D mold flow analysis software to predict resin flow fronts. Comparing predictive analysis with experimental results validates the proposed rapid method's accuracy. Through actual product infusion and mold flow analysis, the study confirms that the proposed method accurately replicates resin flow. In subsequent LRTM product development and design stages, this rapid method serves as a valuable tool for informed decisions on resin flow channel and vacuum evacuation point positions within the mold.