| 摘要 |
<p>Production method for radiators comprising a vertical tubular element (1) with holes (11) in which bushings (2) house, the bushings (2) being provided with 0-rings (4) inserted in recesses (21', 23 a) afforded therein. An expanding element provided with a internal stem (41) and an external expandable tubular element (42) exhibiting longitudinal flutes (421) which expands the external tubular element (42) when the stem (41) is moved axially internally of the tubular element (42) , whereby a terminal slim tract (24) of the bushing (2) is thus enlarged and belling out to strike against walls of the holes (11) . The bushing (2) is then unremovably inserted into a horizontal tubular element (3) , a washer (R) housing in a recess (22) of the bushing (2) being crushed between an internal wall of the tubular element (3) and the bushing (2) , eliminating possibility of sliding of the horizontal tubular element (3) .</p> |
