Cleaning procedure for anilox by overlaying laser spots
AssigneeTEG Technologies Research and Development, S.L.
InventorsLluis Guixeras Nogue, Rafael Guixeras Llora
Life of this patent
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Abstract
Cleaning procedure for anilox including increasing the diameter of the laser spots (4) above the minimum diameter corresponding to focal spot w0 to a working diameter wN, defocusing the pulses of the laser beam (1) using a lens (3) and at the same time, with the help of a galvo mirror (8), redirecting the laser pulses in an organized manner to the cleaning-active zone (19) such that the laser spots (4) that hit the surface of the anilox (9) partially overlap in the linear direction (11) corresponding to the beam advancement and in the circumferential direction (13) corresponding to the direction of the anilox turn, simulating a continuous pulse.
Claims6
A cleaning procedure for an anilox roller, the cleaning procedure comprising the steps of:
- generating a laser beam by using a resonator;
- defocusing the laser beam by using a lens, wherein the defocusing step increases a diameter of laser spots on a surface of the anilox roller;
- redirecting the increased diameter laser beam by using a galvo mirror,
- wherein the laser beam is redirected to a cleaning-active zone on the surface of the anilox roller such that the laser spots hitting the surface of the anilox roller partially overlap in a linear direction corresponding to an advancement of the laser beam and in a circumferential direction corresponding to a turning direction of the anilox roller simulating a continuous pulse of the laser beam.
A cleaning procedure for an anilox roller, the cleaning procedure comprising the steps of:
- generating a laser beam by using a resonator;
- defocusing the laser beam by using a lens, wherein the defocusing step increases a diameter of laser spots on a surface of the anilox roller;
- redirecting the increased diameter laser beam by using a galvo mirror,
- wherein the laser beam is redirected to a cleaning-active zone on the surface of the anilox roller such that the laser spots hitting in the surface of the anilox roller partially overlap in a linear direction corresponding to an advancement of the laser beam and in a circumferential direction corresponding to a turning direction of the anilox roller simulating a continuous pulse of the laser beam;
- calculating a percentage of the overlap of the laser spots in the linear direction based on (fgalboX), an oscillation frequency of the galvo mirror on an X-axis, (Øspot), a diameter of the laser spot, (lbeam), a beam length and (flaser), a beam frequency according to the formula:
- Linear
-
- overlay
- =
- 1
- -
- (
- 2
- ·
- f
- galboX
- ·
- l
- b
-
- e
-
- a
-
- m
- ∅
- spot
- ·
- f
- l
-
- aser
- )
-
- %
- .
A cleaning procedure for an anilox roller, the cleaning procedure comprising the steps of:
- generating a laser beam by using a resonator;
- defocusing the laser beam by using a lens, wherein the defocusing step increases a diameter of laser spots on a surface of the anilox roller;
- redirecting the increased diameter laser beam by using a galvo mirror,
- wherein the laser beam is redirected to a cleaning-active zone on the surface of the anilox roller such that the laser spots hitting the surface of the anilox roller partially overlap in a linear direction corresponding to an advancement of the laser beam and in a circumferential direction corresponding to a turning direction of the anilox roller simulating a continuous pulse of the laser beam;
- calculating a percentage of the overlap of the laser spots in the circumferential direction based on (ωrotranilox), a linear speed of the anilox roller, (Øspot), a diameter of the laser spot and (fgalboY), an oscillation frequency of the galvo mirror on a Y-axis, according to the formula:
- Circunferencial
-
- overlay
- =
- 1
- -
- (
- ω
- r
-
- o
-
- t
-
- r
- anilox
- 2
-
- f
- galboY
- ·
- ∅
- point
- )
-
- %
- .
Dependencies are inferred from the claim text.