射出成形金型の構造的剛性と成形不良 : 射出成形金型の金型構造の改善によるバリ生成の低減(機械要素,潤滑,工作,生産管理など)

概要

論文の詳細を見る
Conventional mold design generally depends on the experience of the designer, however design principles have not been substantiated technically. Therefore, in the mold-size determining stage which is the first step in the design, the mold-size tends to be increased with the intent of achieving sufficient structural stiffness. However, increasing in the mold-size unnecessarily brings about increasing in cost, and requires a larger injection machine. In order to solve these problems and to develop a new mold structure, structural analysis of mold using nonlinear FEM analysis has been carried out in this study. Several kinds of mold structures which consist of those designed by conventional method, newly designed in parting surface, and increased in size, have been analyzed and compared as regards deformation of the parting surface, because an excessive deformation in the molding process will cause a molding flash at the edge of parting surface. The following are the results of structural analysis. (1) An inclined parting surface is the most effective to reduce a deformation at the edge of parting surface. (2) Mold structure in which the moving mold half is thickened in the clamping direction is also effective, but the mold clamping stroke will be limited.
一般社団法人日本機械学会の論文
1997-06-25