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標題: 塑膠瓶蓋之射出成型收縮率與密封配合
Shrinkage of Injection Molding and Close-fitting of Plastic Bottle Caps
作者: 何書偉
關鍵字: plastic bottle cap;塑膠瓶蓋;shrinkage;close-fitting;unscrewing;成型收縮率;密封配合;絞牙脫膜
出版社: 機械工程學系

Several processing parameters which may cause the shrinkage of plastic bottle cap in injection molding are investigated, and three types of polymers including polypropylene, high-density polyethylene, and low-density polyethylene are used in experiment. CAE analysis software is also applied here to predict the process behavior in order to compare with situations resulting from injection molding experiment.
Outer screw thread parts with different dimensions are produced for close-fitting to bottle cap that is made of low-density polyethylene. Also the technique of formation and unscrewing of a plastic part with screw threads in an injection mold are studied, and two injection mold equipped with a chain-to-chain wheel unscrewing mechanism are designed and made . One is for producing bottle caps with inner screw threads, the other is for outer screw thread parts.
Appears in Collections:機械工程學系所

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