Printing Cylinder for a Printing Press
A printing cylinder for a printing press, specifically a web-fed printing press, is disclosed. The printing cylinder having an outer surface and at least one lockup slot introduced into the outer surface to clamp at least one printing form or at least one rubber blanket on the printing cylinder. The entire outer surface of the printing cylinder, including the, or each, lockup slot is evenly coated autocatalytically with nickel and phosphorus.
1 . A printing cylinder for a printing press, specifically a rotary web press, having an outer surface and at least one lockup slot introduced into the outer surface for at least one printing form or at least one rubber blanket on the printing cylinder, wherein the entire outer surface of the printing cylinder, including the, or each, lockup slot, is evenly coated autocatalytically with nickel and phosphorus.
2 . The printing cylinder according to claim 1 , wherein the entire outer surface of the printing cylinder, including the, or each, lockup slot is coated with a dispersion coating consisting of a nickel-phosphorus matrix having ceramic particles and/or lubricating particles evenly embedded in the nickel-phosphorus matrix.
3 . The printing cylinder according to claim 2 , wherein a carbide is embedded in the nickel-phosphorus matrix as a ceramic particle.
4 . The printing cylinder according to claim 3 , wherein silicon carbide (SiC) and/or boron carbide (B 4 C) is embedded in the nickel-phosphorus matrix.
5 . The printing cylinder according to claim 2 , wherein polytetrafluoroethylene (PTFE) and/or perfluoroethylene propylene copolymer (FEP) and/or perfluoralkoxy copolymer (PFA) is embedded in the nickel-phosphorus matrix as a lubricating particle.
6 . A printing cylinder for a printing press, comprising:
a cylinder having an outer surface, wherein the cylinder defines a slot extending along a length of the cylinder; and
a nickel and phosphorus coating disposed on the outer surface and within the slot.
7 . The printing cylinder according to claim 6 , wherein a same thickness of the nickel and phosphorus coating is disposed on the outer surface and within the slot.
8 . The printing cylinder according to claim 6 , further comprising a ceramic particle embedded in the nickel and phosphorus coating.
9 . The printing cylinder according to claim 8 , wherein the ceramic particle is a carbide or a diamond-like carbon.
10 . The printing cylinder according to claim 6 , further comprising a lubricating particle embedded in the nickel and phosphorus coating.
11 . The printing cylinder according to claim 10 , wherein the lubricating particle is a polytetrafluoroethylene (PTFE), or a perfluoroethylene propylene copolymer (FEP), or a perfluoralkoxy copolymer (PFA).
12 . The printing cylinder according to claim 6 , further comprising a printing form or a rubber blanket disposed within the slot and on the outer surface.
13 . A method of manufacturing a printing cylinder for a printing press, wherein the printing cylinder has an outer surface and wherein the printing cylinder defines a slot extending along a length of the printing cylinder, comprising the step of:
coating nickel and phosphorus on the outer surface of the printing cylinder and within the slot of the printing cylinder.
14 . The method according to claim 13 , wherein the nickel and phosphorus are coated autocatalytically on the outer surface of the printing cylinder and within the slot of the printing cylinder.
15 . The method according to claim 13 , wherein the nickel and phosphorus are coated on the outer surface of the printing cylinder and within the slot of the printing cylinder in a single process step.
16 . The method according to claim 13 , wherein the nickel and phosphorus are coated on the outer surface of the printing cylinder and within the slot of the printing cylinder to a same thickness.
17 . The method according to claim 13 , further comprising the step of embedding a ceramic particle in the nickel and phosphorus.
18 . The method according to claim 17 , wherein the ceramic particle is a carbide or a diamond-like carbon.
19 . The method according to claim 13 , further comprising the step of embedding a lubricating particle in the nickel and phosphorus.
20 . The method according to claim 19 , wherein the lubricating particle is a polytetrafluoroethylene (PTFE), or a perfluoroethylene propylene copolymer (FEP), or a perfluoralkoxy copolymer (PFA).