| 摘要 |
In a method for reconditioning a returnable barrel of sheet metal, that is used initially as a bung barrel having a barrel wall and a top cover with a fill and discharge bung and fixedly connected to the barrel wall, and is to be reused as a lid barrel with a bung lid or bung-free lid connected to an outwardly rolled opening rim of the barrel wall via a clamping ring closure after removal of the top cover, wherein the barrel wall has an upper portion forming a barrel neck recessed or tapered relative to the outwardly rolled opening rim of the barrel wall, wherein the top cover of the initial bung barrel has a rolled outer rim placed on the outwardly rolled opening rim of the barrel wall and connected to the outwardly rolled opening rim by lock-seaming and welding, the top cover of the bung barrel is circularly cut concentrically to a longitudinal center axis of the barrel at a transition between a plate of the top cover and an upwardly extending inner rim of the top cover to separate the plate of the top cover from the barrel wall and leave a free lower portion of the upwardly extending inner rim. Subsequently, the lower portion of the upwardly extending inner rim is formed into an annular circumferential inner groove of the barrel neck. |
