The feeding head shape of a die and a streamlined sprue runner were designed after an analysis on the cross sectional shape and the extrusion forming ability of PA66 material.
通过对异型材截面形状及原材料挤出成型性能分析，设计了正确的口模形状及合理的流线形流道；
The results show that the two schemes are right, but the scheme forming head shape in sequence can decrease the forming force significantly, the reason is that the material flow mode is changed.
结果表明，两种方案均能正确成形，但是顺序成形能显著降低成形力，其主要原因是金属的流动模式发生了变化。
HEAD SHAPE: medium in width and slightly longer in length than width with a squareness to the muzzle.
头的形状：中等宽度，头的长度稍微长于宽度，口鼻部是方的。
HEAD SHAPE: medium in width and slightly longer in length than width with a squareness to the muzzle.
头的形状：中等宽度，头的长度稍微长于宽度，口鼻部是方的。
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