The production line is developed by absorbing 1990?west European advanced technology. Main machine is SJZ51/105 or SJZ65/132 cone double screws extruder, equipped with double tubes single controlled stainless steel spraying shaper. When one tube is being adjusted, another one will not be affected. Automatic single controlled double tractor and cutter are mixed together with previous double shaping technology, which makes the operation easier. You can separately control and make double tubes work at the same time.