Direct releasing mould for pressing stoppers of steel cylinders

The utility model relates to a direct releasing mould for pressing and extending a shell cover of a cylinder. The utility model is composed of an upper template, a lower template, a concave mould, a concave mould gasket, a convex mould, etc. An elastic discharging device which is composed of an elastic component and a retreating slide block is arranged between the concave mould and the concave mould gasket. The retreating slide block is used for acting on the surface of the convex mould in a radial direction, when the convex mould returns and travels upwards, a workpiece which is packed on the convex mould is disassembled for stripping. Therefore, working strokes of a presser are shortened, and pressing speeds of the shell cover are enhanced; meanwhile, a crimping flange of the shell cover is cancelled, raw material is saved, and production cost is reduced.