吹瓶機的入瓶胚與出瓶裝置是由槽凸輪、平板凸輪、以及連桿機構組合而成，其動力特性將影響寶特瓶製程的穩定性。本研究之目的是針對旋轉式寶特瓶吹瓶機的入胚與出瓶機構進行系統化的動力特性分析與改善。
本研究合成入胚與出瓶夾爪中心的運動曲線，利用向量迴路法配合運動係數法，分析各個桿件之運動特性。再根據d`Alembert法則及牛頓運動定律，建立運動靜力分析的數學模式，求得輸入力矩、桿件接頭作用力、搖撼力、以及搖撼力矩。本研究亦以能量法分析輸入功率，求得轉速的時間響應。根據動力特性分析之結果，本研究對彈簧進行降低輸入力矩波動值之設計，使入胚與出瓶傳送裝置的輸入波動值分別改善了16.8%與29.7%，而接頭作用力的方均根值約降低了21.58%至34.77%。
本研究針對吹瓶機的凸輪連桿機構建立系統化的動力特性分析模式，透過彈簧改良設計提昇了機器的動力特性。本研究之成果可作為設計旋轉式吹瓶機之參考依據，亦可作為凸輪連桿機構之動力特性提昇研究的依據。本研究所提出的改良方式，有助於業界提昇寶特瓶製程的穩定性。

The infeed and outlet transfer devices of a rotary blow-molding machine are composed of a plate-cam, a slot-cam, and a linkage mechanism. The manufacturing stability of PET-bottles are influenced by the dynamic characteristics of these cam-linkage mechanisms. The purpose of this research aims at the analysis of dynamic characteristics and the improvement for the infeed and outlet transfer devices of an industrial rotary type blow-molding machine.
In this study, the motion curve of the clamp arm center of the infeed and outlet transfer device is synthesized. By using the vector loop approach and kinematic coefficients, the kinematic characteristics of the linkages are analyzed. Base on the d`Alembert’s principle and Newtons’s laws, the input torque, the bearing force, the shaking force, and the shaking moment are calculated. Furthermore, the power equation is used to analyze the input power and the time response of the rotation speed. According to the analysis of the dynamic characteristics, the spring is redesigned to reduce the fluctuation of the input torque. As a result, the fluctuation of the input torque of the infeed and outlet transfer devices are improved by 16.8% and 29.7%, respectively. The root mean square value of the bearing forces are improved about 21.58% to 34.77%.
In this study, a systematic approach for the analysis of dynamic characteristics of the transfer devices of a rotary type blow-molding machine is developed. By improving the spring, the dynamic characteristics of the blow-molding machine are improved. The results of this study provide a solid basis for designing the rotary blow-molding machine and studying the dynamic characteristics of the cam-linkage mechanisms. This study is helpful to improve the manufacturing stability of an industrial PET-bottles blow-molding machine.

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