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Study on the residual wall thickness at dimensional transitions and curved sections in gas‐assisted molded circular tubes
Author(s) -
Yang S. Y.,
Chou H. L.
Publication year - 2002
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10932
Subject(s) - materials science , residual , composite material , rod , molding (decorative) , residual stress , gas pressure , geology , medicine , alternative medicine , pathology , algorithm , computer science , petroleum engineering
Plastic tubes and hollow rods can be fabricated using gas‐assisted injection molding technology with reduced cost. The residual wall thickness around dimensional transitions and curved sections is of great concern. This research investigated the uniformity of the residual wall thickness distribution in circular tubes with dimensional variations and curved sections. It was found that the wall thickness was not uniform near transitions. With the addition of fillets with proper angles around transitions, the uniformity of residual wall could be greatly improved. The residual wall thickness in curved sections was thick around the outer wall and thin around the inner wall. Low melt temperature and high gas pressure were found to reduce the deviation in the wall thickness around curved sections.