Computer aided design of extrusion blown film die
碩士 === 國立交通大學 === 應用化學研究所 === 85 === The blown film die , which is also called the spiral mandrel die , is widely used in the production of tubular products , such as pipes , plastic bags and so on . In order to produce the beautiful and durable products , helicalgrooves cut on the ma...
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ndltd-TW-085NCTU05000202015-10-13T17:59:39Z http://ndltd.ncl.edu.tw/handle/23832717614982963083 Computer aided design of extrusion blown film die 押出吹袋模頭之電腦輔助設計 Luo,Dah-Woei 羅大偉 碩士 國立交通大學 應用化學研究所 85 The blown film die , which is also called the spiral mandrel die , is widely used in the production of tubular products , such as pipes , plastic bags and so on . In order to produce the beautiful and durable products , helicalgrooves cut on the mandrel surface are designed to increase flow uniformity and eliminate welding lines . They are the main characteristics of the spiral mandrel die . There are six parameters in designing the spiral mandrel die , which are the diameter of the mandrel , the number of the helical groove , the initial width of the helical groove , the initial depth of the helical groove , the helical angle and the gap , respectively . This study analyzed the isothermal-non-Newtonian flow , based on the two-dimensional flow simulation , in a die with a mandrel of 11 cm diameter and four helical grooves . Then , the Taguchi method was used to determine the optimal values of the rest of four parameters by considering the performance of the die . The performance of the die was examined from flow uniformity , degree of mixing and total pressure drop . Finally , the optimal geometry of the die was determined . Sequentially , the performance of the die was examined under the nonisothermal condition and the discrepancy between the isothermal and the nonisothermal condition was compared . The results show that it is enough to determine the elementary shape of the die according to the isothermal assumption . Wu,Jiann-Shing 吳建興 1997 學位論文 ; thesis 84 zh-TW |
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碩士 === 國立交通大學 === 應用化學研究所 === 85 === The blown film die , which is also called the spiral mandrel die , is widely used in the production of tubular products , such as pipes , plastic bags and so on . In order to produce the beautiful and durable products , helicalgrooves cut on the mandrel surface are designed to increase flow uniformity and eliminate welding lines . They are the main characteristics of the spiral mandrel die .
There are six parameters in designing the spiral mandrel die , which are the diameter of the mandrel , the number of the helical groove , the initial width of the helical groove , the initial depth of the helical groove , the helical angle and the gap , respectively . This study analyzed the isothermal-non-Newtonian flow , based on the two-dimensional flow simulation , in a die with a mandrel of 11 cm diameter and four helical grooves . Then , the Taguchi method was used to determine the optimal values of the rest of four parameters by considering the performance of the die . The performance of the die was examined from flow uniformity , degree of mixing and total pressure drop . Finally , the optimal geometry of the die was determined .
Sequentially , the performance of the die was examined under the nonisothermal condition and the discrepancy between the isothermal and the nonisothermal condition was compared . The results show that it is enough to determine the elementary shape of the die according to the isothermal assumption .
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author2 |
Wu,Jiann-Shing |
author_facet |
Wu,Jiann-Shing Luo,Dah-Woei 羅大偉 |
author |
Luo,Dah-Woei 羅大偉 |
spellingShingle |
Luo,Dah-Woei 羅大偉 Computer aided design of extrusion blown film die |
author_sort |
Luo,Dah-Woei |
title |
Computer aided design of extrusion blown film die |
title_short |
Computer aided design of extrusion blown film die |
title_full |
Computer aided design of extrusion blown film die |
title_fullStr |
Computer aided design of extrusion blown film die |
title_full_unstemmed |
Computer aided design of extrusion blown film die |
title_sort |
computer aided design of extrusion blown film die |
publishDate |
1997 |
url |
http://ndltd.ncl.edu.tw/handle/23832717614982963083 |
work_keys_str_mv |
AT luodahwoei computeraideddesignofextrusionblownfilmdie AT luódàwěi computeraideddesignofextrusionblownfilmdie AT luodahwoei yāchūchuīdàimótóuzhīdiànnǎofǔzhùshèjì AT luódàwěi yāchūchuīdàimótóuzhīdiànnǎofǔzhùshèjì |
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