有鑑於肘節式機構於塑膠射出機鎖模單元上的廣泛應用,因此本研究主要針對塑膠射出機之肘節夾模機構進行探討,研究內容包含兩項,一為新型肘節機構之開發,另一為肘節機構桿件之尺寸最佳化。 在類型合成(Type Synthesis)部份,本研究採用顏氏創新拓樸機構方法,嘗試尋找出一個有別於目前所有商用機種之新型肘節夾模機構。在第二部份的研究中,先針對目前商用機種中最為普遍之傳統內剪式肘節機構進行運動特性分析,以便於瞭解桿件幾何尺寸上的各種變化對於整體機構系統之影響,同時亦可訂出合理之限制條件並利用最佳化軟體求得桿件最佳化尺寸,以符合吾人所要求之目標函數。 透過本研究尋得最佳化結果之後以電腦輔助工程分析軟體Working Model進行驗證,並與現有之傳統內剪式現有機構做優劣比較,經由本研究所求得之最佳化結果證實對於肘節夾模機構的開、關模行程及夾模週期效率上皆明顯改善,除了以上所述之外,本研究也利用VB語言發展了一套程式可以幫助設計者很容易地決定夾模油壓缸的直徑,避免試誤法的時間浪費與錯誤。
This research is focused on the studies of the toggle mechanism applied in a plastic injection machine (PIM) owing to its widely use.Two topic are included in this research. New toggle mechanism development is first studied by type synthesis method and the optimization of linkages dimensions of toggle mechanism is followed. Yan’s creative topology mechanism design methodology is used in type synthesis to find a new toggle mechanism applied in a PIM. In the optimization of linkages dimensions the kinematics characteristics analysis is studied first to recognize the influence of the change in linkages dimensions on the kinematics characteristics of whole mechanism. also, these results can be applied to be the constraints in dimensions optimization to find a optimal design. The final result of optimization is evaluated by a kinematics analysis software, Working Model, to conform its reliability. It is also compared to the original design to make sure it is more efficient in the performances of stroke and cycle time. Additionally, a software is developed by VB in this study. By this software, designer can decide the dimension of clamping cylinder easily and the time wasting and mistakes can be avoided.