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Generation of large residual stresses in injection moldings
Author(s) -
Kwok C. S.,
Tong Li,
White J. R.
Publication year - 1996
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.10453
Subject(s) - materials science , residual stress , composite material , quenching (fluorescence) , residual , liquid nitrogen , ultraviolet , degradation (telecommunications) , fluorescence , telecommunications , physics , optoelectronics , algorithm , quantum mechanics , computer science
Large residual stresses have been generated in injection molded bars by ejecting them prematurely and completing the cooling process by quenching into ice water or liquid nitrogen. The stress distribution formed under these conditions was found to be much closer to parabolic than is the case when the moldings cool conventionally. Limited testing on moldings made in this way indicated significant property enhancement and improved resistance to ultraviolet degradation.