樹脂レンズ射出成形工程の保圧力制御に関する実験的考察

概要

論文の詳細を見る
Pressure control of the holding process in injection molding should be executed in such a manner as to minimize the variance of specific volume, since plastic lenses shrink greatly in holding processes and any distortion caused by shrinkage should be compensated by pressure control. In this report, we introduce a developed holding pressure I-P control system that has a nozzle pressure feedback mechanism. We designed three versions of the holding pressure control system and applied them to the plastic lens molding. We have shown experimentally that constant specific volume pressure control improves the dimensional accuracy and reduces strain in injection molding of thick molded parts. Of the three versions of the holding pressure control system, that involving average temperature control realizes the greatest improvement of shape accuracy and birefringence.
社団法人日本機械学会の論文
1997-07-25