| 摘要 |
<p>A chain-operated traction unit for drawing, comprising a pair of chains (15, 16) which are arranged on opposite sides with respect to the product to be drawn (30), each being constituted by a plurality of elements (17) which are mutually concatenated so as to form a closed loop which has a substantially straight active portion, which is parallel to the drawing axis (13), and pusher means (46) which are suitable to push toward each other said active portions of said chains (15, 16) in order to impart to said product to be drawn (30) a given traction force, said chains (15, 16) lying on two planes which are substantially parallel to each other, being disposed on opposite sides with respect to said drawing axis (13), and being suitable to cooperate with the product to be drawn (30) by virtue of the opposite lateral surfaces (22) of said concatenated elements (17). <IMAGE> <IMAGE></p> |
