And punch or the lower punch on which is used in a rotary press , a method for modifying a tip surface of the upper punch or the lower punch .

摘要

The present invention is intended to reduce as much as possible the time required for the reforming process of the distal end surface of the punch or the lower punch on which is used in a rotary press , not only the surface roughness Ra at the same distal end surface , if possible , the upper punch or the lower punch the surface roughness Ra of each of the front end face I made ??uniform . . A is a punch or the lower punch 1 on for use in rotary press which is smoothed to the tip surface by arranging a flat radiation marks the end surface throughout formed by irradiation of a laser 3 , the laser 3 while shifting the irradiation position irradiating the distal end surface of the entire upper punch or the lower punch , by arranging a flat illumination mark formed by irradiation of the laser , smoothing the front end surface . . [ Selection Figure Figure 7 .