| 摘要 |
<p>Described herein is a method for obtaining an incision in an embossing roller using a hob, with a low-cost technique that enables protuberances P that are rounded on top to be obtained, which improve the quality of the embossed material and reduce the wear of the mechanical components of the embossing units. The shape of the protuberances (P) is obtained by machining the cylindrical surface of the roller (1) that is placed between the tailstocks of the lathe using a hob that has teeth, the profile of which in cross-sectional view is complementary to that of the cross section of the protuberances illustrated in Figure 6. Figure 6 shows schematically in cross-sectional view a portion of the surface of the roller with protuberances in the machining step and a portion of the hob (10) with the teeth (D) that are generating the grooves that define the side faces of the protuberances . As may be noted in Figure 6A, the grooves between the teeth of the hob have a profile that is curvilinear in a cross-sectinoal view. With a double pass othis taccording two different inclinations of the surface of the roller the protuberances of Figure 5 and 6 are generated.</p> |
