A process for producing a walzenfoermigen praegewerkzeugs

摘要

The invention relates to a process for making a cylindrical embossing tool for embossing a positive and/or negative relief onto at least one side of flat material, characterised in that in one exposure step a flat metal sheet - preferably having a thickness from 0.40 mm to 1.00 mm - is provided on one side with a photoresist layer and is exposed through a film - or an equivalent template - which is provided with a pattern corresponding to the relief, in that then, in a development step, the unexposed regions of the photoresist layer are removed, so that the - cured - exposed regions of the photoresist layer remain, in that the metal sheet is then bent around a roller in the form of a sleeve in such a way that its exposed - cured - regions point outwards, in that then the metal sheet bent in the form of a sleeve - preferably while still on the roller - is rotated about its axis and the regions of the metal sheet which are located between the exposed - cured - regions of the photoresist layer are etched out up to a predefined depth - of preferably from 0.20 mm to 0.60 mm - with an etching liquid, in that the exposed cured regions of the photoresist layer are then removed from the metal sheet bent in the form of a sleeve and placed around the roller or around another roller of equal diameter, in that the edges pointing towards one another of the metal sheet in the form of a sleeve whose etched side points outwards are joined to one another at least in some places to form a metal sleeve and in that the metal sleeve is then fastened on the roller or on another roller having the same diameter. …IMAGE…