Why do some stretching parts need to be stretched multiple times?

1. Multiple stretching can greatly improve the overall elongation coefficient and production efficiency, and ensure the accuracy of the product through multiple uniform stretching processes

2. Only in this way can we reduce the amount of scrap. One molding requires technology, and if it is not pulled well, all will be scrapped. Multiple stretching can achieve even pulling

3. This is to relieve stress in the middle, soften after annealing, and prevent the generation of waste products