Computer simulation of weld lines in injection molded poly(methyl methacrylate).: An article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00096MM3I
ISBN-13978B00096MM30
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on August 15, 1996. The length of the article is 4839 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: Computer simulation packages have had success in predicting filling behavior in extremely complicated geometries. However, few packages offer the possibility of predicting the location and strength of weld lines. This work examines the sensitivity of Moldflow's weld-line prediction algorithm to variations in material properties and processing conditions. Qualitatively, the algorithm correctly predicted the effects of changes in viscosity, density, and PVT relationship on weld-line strength of a poly(methyl methacrylate). The algorithm is also successful in predicting the influence of variations in the injection time on weld line strength. However, the algorithm predictions for changes in the mold and die temperatures were at odds with the experiment. An attempt was made to correlate Moldflow's computed viscosities with the experimentally measured reduction in the strength in the weld-line area. It was shown that a one-to-one relationship existed between these two quantities. Whereas the potential of using the viscosity to predict weld-line strength has been demonstrated, further refinement of this new concept is needed and its validity for other systems has to be established.
Citation Details
Title: Computer simulation of weld lines in injection molded poly(methyl methacrylate).
Author: I.S. Dairanieh
Publication:Polymer Engineering and Science (Refereed)
Date: August 15, 1996
Publisher: Society of Plastics Engineers, Inc.
Volume: v36 Issue: n15 Page: p2050(8)
Distributed by Thomson Gale
From the author: Computer simulation packages have had success in predicting filling behavior in extremely complicated geometries. However, few packages offer the possibility of predicting the location and strength of weld lines. This work examines the sensitivity of Moldflow's weld-line prediction algorithm to variations in material properties and processing conditions. Qualitatively, the algorithm correctly predicted the effects of changes in viscosity, density, and PVT relationship on weld-line strength of a poly(methyl methacrylate). The algorithm is also successful in predicting the influence of variations in the injection time on weld line strength. However, the algorithm predictions for changes in the mold and die temperatures were at odds with the experiment. An attempt was made to correlate Moldflow's computed viscosities with the experimentally measured reduction in the strength in the weld-line area. It was shown that a one-to-one relationship existed between these two quantities. Whereas the potential of using the viscosity to predict weld-line strength has been demonstrated, further refinement of this new concept is needed and its validity for other systems has to be established.
Citation Details
Title: Computer simulation of weld lines in injection molded poly(methyl methacrylate).
Author: I.S. Dairanieh
Publication:Polymer Engineering and Science (Refereed)
Date: August 15, 1996
Publisher: Society of Plastics Engineers, Inc.
Volume: v36 Issue: n15 Page: p2050(8)
Distributed by Thomson Gale
