Metal tubular body and manufacturing method thereof

摘要

Side hole-bearing tubular bodies made of metal and having an inside diameter of up to 2mm are manufactured by a method which includes punching from a metal sheet (1) a sheet blank (2) in the developed shape of a tubular body and punching in the sheet blank (2) a hole (4) which corresponds to the side hole in the tubular body and/or notches (4a,4b) which form the side hole (4) when the sheet blank (2) is pressed into a tubular shape, in such a way that the metal sheet (1) and the sheet blank (2) remain partly joined; pressing the sheet blank (2) into a tubular shape; and cutting apart the metal sheet (1) and the sheet blank (2) where they remain joined. Metal tubular bodies manufactured in this way can have one or more side holes (4) of any shape, position or number thereon, and are highly suitable for use in medical devices such as syringe needles.