In this article shapes of parisons and blowing mandrels for injection blow mouldings were designed according to the shapes of finished articles and the feature of injection blow moulding process.
本文依据中空容器的结构特点及注射吹塑成型机成型工艺特点，设计注射吹塑用型坯及芯棒。
2
Basic principles of rotational moulding, process features and mould design criteria are introduced in this article.
本文概述了滚塑成型的基本原理、工艺特点和模具设计要点。
3
Mould protection for plastic moulding injection is one of the subjects which can never be neglected. This article investigates the matter viewed from practical use.