| 摘要 |
Method to make a curved tubular element (10) in order to convey abrasive materials such as concrete or suchlike, which comprises a first step of making at least a curved component (12; 112) made of a material highly resistant to wear, having an arched transverse development comprised between 90° and 360°, a second step of inserting said curved component (12) into a shaping mold (16; 1 16) with a molding surface (23, 25; 127) with a shape mating with the outer surface of at least a part of the curved tubular element (10; 110) to be made, so that, together with said molding surface (23, 25; 127), said curved component (12; 112) defines a casting chamber (26; 126), and a third step in which material with a low resistance to wear is cast in said casting chamber (26; 126) in order to make, externally to said curved component (12; 112), at least a part of a tubular body (11; 1 11) of said curved tubular element (10; 110), |
