The present invention discloses a forming device for a large thin-walled part with a curved surface, which includes a punch, a blank holder, a die, a lower die plate, a first annular sleeve and second annular sleeves. The first annular sleeve is connected with first driving oil cylinders. An inner diameter of the die is greater than an outer diameter of the punch. The first annular sleeve is arranged in a gap between the punch and the die. The second annular sleeve is arranged at the bottom of the punch. The first annular sleeve is arranged outside the second annular sleeve. The second annular sleeve is connected with second driving oil cylinders. The first driving oil cylinders and the second driving oil cylinders are connected with a hydraulic system.

The present invention discloses a forming device for a large thin-walled part with a curved surface, which includes a punch, a blank holder, a die, a lower die plate, a first annular sleeve and second annular sleeves. The first annular sleeve is connected with first driving oil cylinders. An inner diameter of the die is greater than an outer diameter of the punch. The first annular sleeve is arranged in a gap between the punch and the die. The second annular sleeve is arranged at the bottom of the punch. The first annular sleeve is arranged outside the second annular sleeve. The second annular sleeve is connected with second driving oil cylinders. The first driving oil cylinders and the second driving oil cylinders are connected with a hydraulic system.

A method of forming a cup-shaped body for a beverage capsule comprising the steps of: a) in a first stage drawing a sheet of material into a cup-shaped body preform; and b) in a second stage transforming the cup-shaped body preform into the cup-shaped body; wherein after the first stage the cup-shaped body preform comprises a base and a preformed side wall which extends from the base to a rim; wherein the preformed side wall comprises: an outwardly-extending step proximate the rim; a primary side wall section extending between the base and the outwardly-extending step; and a secondary side wall section extending between the outwardly-extending step and the rim; wherein in the second stage the preformed side wall is deformed such that the cup-shaped body comprises the base and a side wall which extends from the base to the rim; wherein the side wall comprises: an annular trough; a first side wall section extending between the base and the annular trough; and a second side wall section extending between the annular trough and the rim.

A method of forming a cup-shaped body for a beverage capsule comprising the steps of: a) in a first stage drawing a sheet of material into a cup-shaped body preform; and b) in a second stage transforming the cup-shaped body preform into the cup-shaped body; wherein after the first stage the cup-shaped body preform comprises a base and a preformed side wall which extends from the base to a rim; wherein the preformed side wall comprises: an outwardly-extending step proximate the rim; a primary side wall section extending between the base and the outwardly-extending step; and a secondary side wall section extending between the outwardly-extending step and the rim; wherein in the second stage the preformed side wall is deformed such that the cup-shaped body comprises the base and a side wall which extends from the base to the rim; wherein the side wall comprises: an annular trough; a first side wall section extending between the base and the annular trough; and a second side wall section extending between the annular trough and the rim.

A method for forming a deep draw closure cap includes draw forming a first cup from a planar sheet of a metal material defining a base thickness. The first cup comprises a first cup base, a first cup wall, and an open end. A first redrawing of the first cup is performed to form a first redrawn cup including a first redrawn cup base, a first redrawn cup wall, and an open end. The first redrawn cup is passed through an ironing die to reduce a thickness of the first redrawn cup wall adjacent to the open end.

A press forming process forms a blank, which is the material to be pressed, into a product having a predetermined shape including a continuous hat-shaped section in the longitudinal direction and a curved portion protruding toward the top surface side in the longitudinal direction. In the press forming process, an intermediate product which has an excess thickness portion formed at a part of the curved portion of the product and protruding higher than the top surface of the product is formed while constraining the portion of the intermediate product other than the excess thickness portion until the excess thickness portion projects in a direction opposite to the protrusion direction thereof, whereby the intermediate product is formed into a predetermined shape.

A domer station having a domer assembly, a housing assembly, and a stacked piston assembly is provided. The domer assembly is movably disposed within a domer body passage located in the housing assembly and structured to move between a forward, first position and a retracted, second position. The stacked piston assembly includes a plurality of pistons, preferably three pistons, disposed in series and a pressure supply. The pistons are disposed behind the domer in pressure chambers. The pistons have a constant pressure applied thereto and are biased towards the domer. The pistons are, however, each restrained by a stop and do not contact, or operatively engage, the domer when the domer is in the domer first position.

A domer station having a domer assembly, a housing assembly, and a stacked piston assembly is provided. The domer assembly is movably disposed within a domer body passage located in the housing assembly and structured to move between a forward, first position and a retracted, second position. The stacked piston assembly includes a plurality of pistons, preferably three pistons, disposed in series and a pressure supply. The pistons are disposed behind the domer in pressure chambers. The pistons have a constant pressure applied thereto and are biased towards the domer. The pistons are, however, each restrained by a stop and do not contact, or operatively engage, the domer when the domer is in the domer first position.

A first-face forming portion of a workpiece and a second-face forming portion spaced apart from it by the length of an intermediate portion are clamped with a first-face forming die and a second-face forming die, respectively. The first-face forming die is moved either upward or downward and the second-face forming die is moved in a direction toward the first-face forming die, and the second-face forming die is pressed against the first-face forming die to shape the upright wall portion.

A first-face forming portion of a workpiece and a second-face forming portion spaced apart from it by the length of an intermediate portion are clamped with a first-face forming die and a second-face forming die, respectively. The first-face forming die is moved either upward or downward and the second-face forming die is moved in a direction toward the first-face forming die, and the second-face forming die is pressed against the first-face forming die to shape the upright wall portion.