在充分考虑了非平衡浇注系统的沿程损失与局部损失的情况下，从能量角度确定了非平衡浇注系统第二级分流道和浇口半径之间的关系。
After evaluating the route loss and the local loss of the imbalance injection system, the article confirms the relation of the second grade branch radius from the scope of energy.
相对于小浇口，中、大浇口条件下动态注射成型复合材料的拉伸强度、冲击强度均有明显的提高；
Compared with the small gate, the tensile strength and impact strength of PP/CaCO3 composites by vibration injection molding under the middle gate and the large gate increase notably.
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