根据本发明设定，将每个拉伸辊(2.1、2.2)控制到规定的运动值。

According to the invention, each drawing roller (2.1, 2.2) is controlled to a prescribed motion value.

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其后加工特点是：一级拉伸发生在蒸气浴槽内，二级拉伸发生在第二拉伸辊与定型辊之间。

The process characteristic is that the first draw occurs in a steam box and the second draw between the succeeding drawing roller and setting roller.

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与传统的拉伸辊牵伸、静压挤出及柱塞式挤出工艺相比，口模牵伸具有明显的优越性和发展潜力。

Compared with conventional tensile drawing and hydrostatic or ram extrusion, die drawing process has considerable advantages and developing potentials.

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