Schuler Pressen Gmbh

Schuler Pressen Gmbh + Co. Kg

Klaus Blei

Gerhard Pick

Martin Gaebges

Markus Röver

Uwe Gunther

Roland Schmid

The invention is to a device and method, for cutting a can blank in which case an end section of the can blank is severed. The can blank is moved by means of a conveyor arrangement at a constant speed about a first axis of rotation. Preferably, a laser beam is used as the cutting means. A deflecting arrangement deflects the laser beam to a focal point where the side surface of the can blank is located. Due the rotation of the can blank about its longitudinal axis, the axial end section of said can blank is severed. The focal point of the laser beam does not change relative to the longitudinal axis of the can blank during the laser cutting operation.

Device and method for cutting off an end section of a can blank

An ironing ring for use in a press for ironing pressing or drawing of a workpiece. The ironing ring has a work surface which, upon deforming the workpiece, contacts the workpiece, and causes flowing of the workpiece material. In order to prevent friction deposits in the region of the work surface of the ironing ring, a microstructure, differing from the roughness of the work surface, is introduced into the work surface, which forms elevations and/or recesses in the work surface. Material particles remaining on the work surface after the deforming of a workpiece thus adhere less strongly to the work surface and can be stripped off during the next deforming process.

Ironing ring having a microstructure

A can body (II) having a can base () and a can wall () is shaped by a wall ironing process starting with a blank (). A drawing punch () moves the blank () through a wall ironing container () from an opening () to an exit (). The edge (R) of the can body (II) opposite the can base () is separated using a cutting device (), which has a force generating unit () arranged adjacent to the exit () and at least one cutting edge () which can be arranged on the drawing punch (). The force generating unit () generates a force (F) onto the can wall () edge (R) to be separated, whereby the edge is sheared off on the at least one cutting edge (). The can body (II) is located on the drawing punch () while the edge (R) is being separated.

Device and method for producing can bodies, comprising a cutting device

The invention concerns an arrangement () and a method for the manufacture of can bodies from pot-shaped blanks (). To this end, the blank () is inserted into a bottom tool part (). The blank () is clamped between a downholder () and a counter support surface () of the lower tool part (). For controlling a position value &#x3b1; determining the position and/or position change of the downholder (), a drive arrangement () is provided. The drive arrangement controls the position value in accordance with a predetermined course, so as to move the downholder () into the clamping position or out of the clamping position EP. As soon as the downholder () reaches its clamping position EP, the drive unit () controls a force value in accordance with a predetermined course which determines the clamping force F(t) which is applied by the downholder () to the blank (). This occurs preferably by an adjustment of the motor current I to a predetermined course of the desired value I(t).

Downholder control in the manufacture of can bodies

In a method according to the invention for the manufacture of tear notches () in can lids (), the can lid () is subjected in the press tool () to a laser engraving during which the desired tear notch () is generated. The laser ablation process occurs preferably, with the press tool () closed, within a time period of less than 30 ms. During this time, the focal spot () of the laser beam () is moved over the whole desired contour of the tear notch () so that an uninterrupted groove-like cavity is formed. With the use of laser engraving in the press tool, the mechanical wear of the press tool and of the press molds can be minimized and in this way the tool operating life can be increased. In particular, the manufacture of can lids with consistently high quality is ensured.

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Wangen, Germany

Klaus Blei