熱可塑性樹脂射出成形品の残留応力

概要

論文の詳細を見る
The residual stress distribution in injection molded PP, HD-PE and glass fibre reinforced PP has been studied. The test specimens were of the standard shape and size prescribed in ASTM D955, namely, DISK and BAR type, having the thickness of 1, 2 and 3 mm. The residual stress distribution throughout the thickness from the surface to the middle showed an unexpectedly large change. In PP, the surface layer, the highly oriented layer and the core layer were under compression, tension and again compression stress, respectively. In HD-PE, on the other hand, the residual stress distribution pattern differed greatly depending on the specimen thickness and orientation. Such residual stress distribution may result from the differences in cooling rate across the thickness and in molded-in fine structure. In the case of glass fibre reinforced PP, the orientation of the glass fibre has an dominant effect on the residual stress distribution. Higher melt stock temperature has a tendency to increase residual stress.
社団法人日本材料学会の論文
1980-07-15