PIPE FOR CONVEYING ABRASIVE MATERIALS SUCH AS CONCRETE, APPARATUS AND METHOD FOR PRODUCING SAID PIPE

摘要

Method and apparatus for producing a curved tubular segment (10) comprising obtaining a curved external tubular element (11) and a curved internal tubular element (12) made of a material having a resistance to wear greater than that of the curved external tubular element (11) and having a cross section such as to cover at least part of the internal surface (13) of the curved external tubular element (11). It provides the insertion of the curved internal tubular element (12) inside the curved external tubular element (11) after heating the latter by means of a heating unit (29). Moreover, to form the curved external tubular element (11) on the exact geometry of the curved internal tubular element (12) a molding unit (25, 31) and a cooling unit (30) are used to obtain a curved tubular segment (10) without spaces between the curved external tubular element (11) and the curved internal tubular element (12).