Contribution of flow deformation to the shrinkage of injection molded PVC

Authors
Harrell, ER Elleithy, RH McFarland, CA Summers, JW
Citation
Er. Harrell et al., Contribution of flow deformation to the shrinkage of injection molded PVC, J VINYL A T, 5(3), 1999, pp. 116-124
Citations number
6
Categorie Soggetti
Material Science & Engineering
Journal title
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
ISSN journal
10835601 → ACNP
Volume
5
Issue
3
Year of publication
1999
Pages
116 - 124
Database
ISI
SICI code
1083-5601(199909)5:3<116:COFDTT>2.0.ZU;2-0
Abstract
The viscoelastic nature of PVC cannot be ignored during the injection moldi ng process. Strains imposed on the compound during the injection stage disp lay recovery dynamics that are indicative of the temperature at which the s trains were imposed. A mathematical model, employing "approximate" time-tem perature modulus relationships, provided the basis for interpreting the shr inkage data. A distribution map of the various relative temperatures attain ed within the part during injection was determined.