The updated mathematic models for calculation of the central pipe formotion in continuous cast billet are built up, based on the material balance and the previous published models.
通过物质平衡原理讨论并新建立了计算方坯中心缩孔的数学模型。
In order to gain a clear idea of the shrinking direction of injection molding products,the shrinkage mechanism is analyzed and,thereby,a concept of shrinkage center is derived.
本文针对注塑模具设计中存在的注塑制品收缩方向含混不清的问题 ,通过分析注塑成型制品的收缩机理 ,提出“收缩中心”的概念 ,建立能够对实际收缩情况进行合理解释的收缩规则 ,并据此开发了预测注塑成型制品收缩率分布趋势的程序 ,计算结果与实验结果吻合较好。