Abstract: The present invention refers to a method for obtaining an opening (8) in a hollow-body member (3) having a longitudinal extension and a cavity (6), and to a hollow-body member (3) provided with one or more openings (8, 9) obtained with the above-mentioned method, which includes the following phases: a. predisposing a holding die (12) including a seat (17) countershaped with respect with said hollow-body member (3) and an ejection channel (13) having a first end (18) communicating with said seat (17) and a second ejection end (19); b. inserting and positioning the hollow-body member (3) in the seat (17) so that said first end (18) is arranged in correspondence with a wall portion of said hollow-body member (3) on which to obtain an opening (8); c. generating a progressively increasing pressure inside said cavity (6) sufficient to deform said wall portion (16) to a point of detaching it from the hollow-body member (3) to form said opening (8), and expelling the wall portion (16) along the ejection channel (13).

Abstract: The present invention refers to a method for obtaining an opening (8) in a hollow-body member (3) having a longitudinal extension and a cavity (6), and to a hollow-body member (3) provided with one or more openings (8, 9) obtained with the above-mentioned method, which includes the following phases: a. predisposing a holding die (12) including a seat (17) countershaped with respect with said hollow-body member (3) and an ejection channel (13) having a first end (18) communicating with said seat (17) and a second ejection end (19); b. inserting and positioning the hollow-body member (3) in the seat (17) so that said first end (18) is arranged in correspondence with a wall portion of said hollow-body member (3) on which to obtain an opening (8); c. generating a progressively increasing pressure inside said cavity (6) sufficient to deform said wall portion (16) to a point of detaching it from the hollow-body member (3) to form said opening (8), and expelling the wail portion (16) along the ejection channel (13).