Method for producing trim strips and trim strips produced using said method

A method for producing a trim strip which, in the extent direction thereof, has a length which is at least twice as large as the width thereof perpendicularly to said extent direction, has an extension portion and at least at one end a portion which is bent over with respect to the extent direction about an angle (a) in the range from 60−120° with a sharp edge comprising the following steps of:

• i) presenting a plate with a material thickness and with a prepared contour for a formation of the extension portion of the trim strip;
• ii) bending the prepared contour of the plate in a bending operation, during which bending operation the plate in the region of said extension portion, at least in an end region, is clamped between a die and a holding-down member and the prepared contour of the plate is bent over by means of a displacement of a stamp to form a bent-over portion with a peripheral edge;
• iii) forming of said sharp edge of the bent-over portion of said plate to form said trim strip,
• wherein at least in the end region of said extension portion a counter-mold is clamped between a first clamping face of the die and a second clamping face of the holding down member,
• such that the inner face of said bent-over portion is in abutment with a planar or curved side face of said counter-mold, such that a corresponding side face of the die protrudes further in the extent direction substantially by the material thickness than the side face of the counter-mold, and
• such that the first clamping face of the die is continued in an overhanging region by the material thickness in the extent direction, with a sharp edge of the die being formed with respect to the side face of the die, and
• iv) guiding a stamp with a side face which is stepped substantially by the material thickness and which faces the die and counter-mold in such a manner along the side faces of the counter-mold and die that the step in the side face of the stamp engages on said peripheral edge and displaces the material of the bent-over portion at least partially in the edge region with said sharp edge being formed.