In this way two or more advancing fronts would rarely meet to form a weld line with consequent mechanical weakness and surface blemish in the moulding.

这时，两股或多股前锋料流可能会汇合而形成溶接线，造成机械强度的减弱和塑件上的瑕疵。

The results show that the method can effectively resolve the TWB forming process parameters, and that the weld line movement can be reduced by more than 75%.

优化计算结果表明，该方法能有效求解拼焊板成形过程参数，使焊缝有害偏移量减少75%以上。