模具開閉機構由一左側模具及一右側模具組成，其廣泛應用於各式塑膠產業機械。本研究之主要目的為設計多種左右模具可同時快速做動之凸輪連桿機構，且其具有較高剛性以降低殘振。
在模具開閉機構構造設計方面，以平面凸輪機構作為驅動，設計一被凸輪機構驅動之連桿組，用以帶動左側模具，以及另一用以使右側模與左側模同步之連桿組，且該連桿與左側連桿組相連接。
本研究首先以有理式B仿線合成左側模具間歇運動曲線，並以機械利益為依據，優化各連桿尺寸，進一步求取右側模及凸輪從動件運動曲線之解析解，接著進行剛體動力分析。最後針對凸輪幾何參數進行分析，並選擇凸輪從動件滾子尺寸，達到目標運作速度下較佳之滾子壽命。
本論文提出八種不同之機構構造，根據其運動及動力特性，選擇較佳之機構構造，進一步優化其運動及動力，最終得到一較佳之模具開閉機構。

Composed of a left mold and a right one, an open and close molding mechanism is widely used in various plastic industries. The aim of this study is to design cam-link mechanisms whose right mold motions can rapidly synchronize with their left mold motions so that the mechanisms have higher stiffness for reducing residual vibration.
In structural design of a molding mechanism, the device is actuated by a planar cam mechanism. And a set of cam actuated links is synthesized to drive the left mold. Then, another set of links connected to one of the left mold links is used to synchronously actuate the right mold together with the left mold.
This study first is to synthesize the B-Spline curves for the left mold motion. Subsequently, the linkage sizes are modified base on the mechanical advantages. Then, the motion curves of the right mold and the cam follower device can be analytically determined. And the rigid body dynamic behavior of the mechanism is analyzed. Finally, the geometry of the cam is analyzed and the size of the cam follower rollers are selected to achieve the longer life time at the working speeds.
This research presents eight different design cases to investigate the kinematic and dynamic characteristics of the molding mechanism. As a result, a case with improved kinematic and dynamic performance is selected.

目錄 i
圖目錄 ii
表目錄 v
摘要 vi
ABSTRACT vii
第1章 緒論 1
1.1 研究動機與目的 1
1.2 文獻回顧 1
1.3 設計流程及方法 3
第2章 機構構造設計 7
2.1 機構設計目標 7
2.2 驅動形式選擇 8
2.3 設計構想 9
2.3.1 凸輪驅動機構 11
2.3.2 左右模具連動機構 13
2.3.3 機構構造選擇 15
第3章 連桿機構運動及尺寸設計 16
3.1 模具運動曲線設計 16
3.2 機構構造子機構拆解 19
3.3 連桿尺寸優化設計 20
3.3.1 四連桿肘節機構運動連續性之探討 20
3.3.2 直線輸入構造及搖擺輸入構造B部設計 25
3.3.3 直線輸入構造C部連桿設計 29
3.3.4 搖擺輸入構造C部連桿設計 32
3.3.5 等行程四連桿設計 34
第4章 凸輪驅動連桿機構整體設計 38
4.1 剛體動力分析及凸輪設計 38
4.2 左右側模具及凸輪從動件運動曲線 43
4.3 凸輪滾子壽命計算及滾子選擇 45
第5章 結論 51
參考文獻 52
附錄 54
附錄 1 機械利益(Mechanical Advantages) 54
附錄 2 其他機構構造 59
附錄 3 表面疲勞壽命 62

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