METHOD OF MANUFACTURING A TUBE

摘要

A method of manufacturing a tube ( 8 ) is disclosed. The method comprises forming a tube ( 8 ) by extrusion, causing a body ( 24 ) to move longitudinally relative to the internal bore of the tube ( 8 ), and determining whether the body ( 24 ) ceases to move relative to the tube ( 8 ) At least part of said extrusion step and said step of causing a body ( 24 ) to move relative to the internal bore of the tube ( 8 ) are carried out simultaneously, and the body ( 24 ) is caused to move relative to the internal bore of the tube ( 8 ) by means of at least one first tensile element ( 22 ) attached to said body ( 24 ).