Computer-aided geometric design of the preform dies for flat film extrusion through 3-D finite element flow analysis.: An article from: Polymer Engineering and Science
Book Details
Author(s)Yeh Wang, Hoh-Yih Tsay
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00092LANU
ISBN-13978B00092LAN3
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on July 15, 1994. The length of the article is 5244 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: A rational computer-aided design procedure is presented for determining the optimum flow channel geometry of a flat film die, which yields a minimum pressure drop and produces a uniform transverse flow rate distribution. The three-dimensional die surface is generated by analytic expressions that represent a dumbbell-like contour. The die surface may be specified by several geometric parameters. The length of the transition zone turns out to be the controlling parameter. Because of the complicated geometric boundary, it is not possible to optimize the flow channel geometry explicitly; instead, a computer trial procedure is employed. The numerical computation is based on an isothermal three-dimensional flow model, which assumes power law behavior for the polymer melts. The calculated results indicate that for a particular polymer and a particular aspect ratio of slit, there may exist an optimum transition length from which the flow channel geometry of a flat film die may be uniquely defined.
Citation Details
Title: Computer-aided geometric design of the preform dies for flat film extrusion through 3-D finite element flow analysis.
Author: Yeh Wang
Publication:Polymer Engineering and Science (Refereed)
Date: July 15, 1994
Publisher: Society of Plastics Engineers, Inc.
Volume: v34 Issue: n13 Page: p1090(11)
Distributed by Thomson Gale
From the author: A rational computer-aided design procedure is presented for determining the optimum flow channel geometry of a flat film die, which yields a minimum pressure drop and produces a uniform transverse flow rate distribution. The three-dimensional die surface is generated by analytic expressions that represent a dumbbell-like contour. The die surface may be specified by several geometric parameters. The length of the transition zone turns out to be the controlling parameter. Because of the complicated geometric boundary, it is not possible to optimize the flow channel geometry explicitly; instead, a computer trial procedure is employed. The numerical computation is based on an isothermal three-dimensional flow model, which assumes power law behavior for the polymer melts. The calculated results indicate that for a particular polymer and a particular aspect ratio of slit, there may exist an optimum transition length from which the flow channel geometry of a flat film die may be uniquely defined.
Citation Details
Title: Computer-aided geometric design of the preform dies for flat film extrusion through 3-D finite element flow analysis.
Author: Yeh Wang
Publication:Polymer Engineering and Science (Refereed)
Date: July 15, 1994
Publisher: Society of Plastics Engineers, Inc.
Volume: v34 Issue: n13 Page: p1090(11)
Distributed by Thomson Gale
