Figure 4: PDTTM Crater Matrix
In addition the broad peaks produced by the PDTTM
process are highly desirable to provide very good
texture transfer to the rolled sheet and wear
characteristics of the work rolls without the need for
any form of “post processing” to modify the surface
after the initial texturing, as is a common practice by
many sheet producers using the EDT process.
The Pomini Digital Texturing™ process has the
ability to produce a wide range of surface texture and
after testing in user’s rolling mills the performance of
the surface textures was sufficiently verified to design
and manufacture the first production machine. This
machine has been in operation for 18 months
texturing both production and trial rolls for rolling
mills.
Investigations
Various types of PDTTM surface textures have been
developed for specific applications, primarily with the
aim of producing the requested surface on the rolled
sheet while improving the work roll performance.
Initially, PDTTM surface textures replicating the
overlapping matrix craters of EDT have been
produced while also improving specific attributes
such as Ra consistency, transfer of Rpc and work roll
life. A typical PDTTM surface is magnified in figure 5,
where the random and isotropic arrangement of
uniform craters can be seen. A roll after texturing can