Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/1777
標題: PET瓶胚設計參數之探討
A Study of Parameters for PET Preform Design
作者: 鄭基鋒
Cheng, Ji Fong
關鍵字: Preform;瓶胚;Bottle;Blow Molding;Biaxial Stretch;保特瓶;吹氣成形;二軸延伸
出版社: 機械工程學系
摘要: 
摘 要 PET保特瓶具有良好的物理性質、機械性質及氣密性質,廣受
飲料業者及消費者的喜歡。由於PET熔融黏度低,很難用押出中空成型來
製瓶,所以要先設計瓶胚,由射出成形製作瓶胚後再給予加熱軟化做延伸
吹氣成型,因此瓶胚是吹瓶的先決要件,而瓶胚的設計則是影響吹瓶良否
的重要關鍵之一。本文針對瓶胚的設計,將瓶胚分成牙口、頸部、胚體與
底部四部分做設計探討,牙口已是標準化製品,在此僅為選用;而對瓶胚
之頸部、胚體與底部的設計,文中提出「圖解法」來設計,並對瓶胚的頸
部、胚體與底部做各別的設計探討,尤其瓶胚頸部的設計是最複雜也是最
難設計的

Abstract PET bottles have very good physic, mechanical and
airtight properties. It has been a favorite product for
beverages packer and consumer. Because of PET''s low melt
viscosity, the process of making hollow bottles by extrude-
molding can not be used. The suitable process is injection
stretch blow molding. A preform is needed for stretch blow
molding. The preform was made by injection molding then
reheating before blow molding. Therefor, it should have preform
been designed for the blow molding. This research suggests
that the design of the preform should be divided into four
parts: thread, neck, body and bottom. The design criteria for
the preform are based on the requirements of bottle. The neck of
preform is designed based on the shoulder of the bottle. The
"Drawing Method" is developed in this research for the design of
preform according to the hoop stretch ratio, longitudinal
stretch ratio, and the shape of the bottle. The preform designed
by drawing method can stretch to the bottle as req
URI: http://hdl.handle.net/11455/1777
Appears in Collections:機械工程學系所

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