extruder France

... tools are generally larger than those of the finished tube, resulting in a draw ratio between the product exiting the extruder and the finished product. The hot tube is then drawn into the third tool, or calibrator, placed in a vacuum chamber. This calibrator allows the tube to cool while taking its final dimensions. This last machined piece represents the most significant part of the tooling for tubes. It is specific to each outer diameter of the tube. The quality of a tube will then be judged by adherence to the diameters, cutting length, minimal ovality, and off-centering.