A comprehensive experimental study and numerical modeling of parison formation in extrusion blow molding.(Author abstract): An article from: Polymer Engineering and Science
Book Details
PublisherThomson Gale
ISBN / ASINB000N0X4T6
ISBN-13978B000N0X4T8
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Description
This digital document is an article from Polymer Engineering and Science, published by Thomson Gale on January 1, 2007. The length of the article is 7243 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: Parison dimensions in extrusion blow molding are affected by two phenomena, swell due to stress relaxation and sag drawdown due to gravity. It is well established that the parison swell and sag are strongly dependent on the die geometry and the operating conditions. The availability of a modeling technique ensures a more accurate prediction of the entire blow molding process, as the proper prediction of the parison formation is the input for the remaining process phases. This study considers both the simulated and the experimental effects of the die geometry, the operating conditions, and the resin properties on the parison dimensions using high density polyethylene. Parison programming with a moving mandrel and the flow rate evolution in intermittent extrusion are also considered. The parison dimensions are measured experimentally by using the pinch-off mold technique on two industrial scale machines. The finite element software BlowParison[R] developed at IMI is used to predict the parison formation, taking into account the swell, sag, and nonisothermal effects. The comparison between the predicted parison/part dimensions and the corresponding experimental data demonstrates the efficiency of numerical tools in the prediction of the final part thickness and weight distributions. POLYM. ENG. SCI., 47:1-13, 2007. [c] 2006 Society of Plastics Engineers*
Citation Details
Title: A comprehensive experimental study and numerical modeling of parison formation in extrusion blow molding.(Author abstract)
Author: Azizeh-Mitra Yousefi
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: January 1, 2007
Publisher: Thomson Gale
Volume: 47 Issue: 1 Page: 1(13)
Article Type: Author abstract
Distributed by Thomson Gale
From the author: Parison dimensions in extrusion blow molding are affected by two phenomena, swell due to stress relaxation and sag drawdown due to gravity. It is well established that the parison swell and sag are strongly dependent on the die geometry and the operating conditions. The availability of a modeling technique ensures a more accurate prediction of the entire blow molding process, as the proper prediction of the parison formation is the input for the remaining process phases. This study considers both the simulated and the experimental effects of the die geometry, the operating conditions, and the resin properties on the parison dimensions using high density polyethylene. Parison programming with a moving mandrel and the flow rate evolution in intermittent extrusion are also considered. The parison dimensions are measured experimentally by using the pinch-off mold technique on two industrial scale machines. The finite element software BlowParison[R] developed at IMI is used to predict the parison formation, taking into account the swell, sag, and nonisothermal effects. The comparison between the predicted parison/part dimensions and the corresponding experimental data demonstrates the efficiency of numerical tools in the prediction of the final part thickness and weight distributions. POLYM. ENG. SCI., 47:1-13, 2007. [c] 2006 Society of Plastics Engineers*
Citation Details
Title: A comprehensive experimental study and numerical modeling of parison formation in extrusion blow molding.(Author abstract)
Author: Azizeh-Mitra Yousefi
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: January 1, 2007
Publisher: Thomson Gale
Volume: 47 Issue: 1 Page: 1(13)
Article Type: Author abstract
Distributed by Thomson Gale
