| 摘要 |
<p>Process and method for drawing with calibrated extrusion precision tubular linings and tubes made of rubber, plastic and the like, wherein, according to the invention, liquid and homogenized polymeric material is fed continuously and under pressure (for example from an extruder) into a device for drawing with calibrated extrusion (10), in which it is divided up into a plurality of flows, is forced to pass through an annular extrusion passage (P) formed between two extrusion dies (22, 43), one inner and the other outer, is extruded through said passage (P) in calibrated tubular form, following a varied extrusion path between facing ramps (Re/Ri) and is then drawn through a following tubular drawing mouth (43.1), imitating the shape of the internal surface thereof and emerging under its own movement.</p> |
