on press anilox roll laser cleaning - pros and cons...• cleaned hundreds of anilox and chrome...
TRANSCRIPT
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On Press Anilox Roll Laser Cleaning
- Pros and Cons -
Jeff Paduano
President
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ARCS – Past and Present
• Company founded 1984; Headquartered in Hatfield, PA
• Pioneered Soda Method for On Press Roll Cleaning
• Experience cleaning thousands of rolls over 3+ decades:
✓ Narrow web, Wide Web, Corrugator, Ceramic, Chrome
✓ Water based ink, UV, Solvent, Adhesive, Glue, Cross-linked
• Cleaning Service Options:
1. On Site: On or Off Press (East Coast and Midwest)
2. Off Site: Philadelphia / Greensboro / Grand Rapids
• Systems too: Laser Systems and Baking Soda Equipment
• Visitors Welcome ! Roll Cleaning Demos, Anicam, Other cleaning
technologies (dry ice blasting, vapor blasting, parts cleaning, eco-friendly
paint and rust removal methods, metal finishing cabinets)
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ARCS + Lasers Timeline
• Involved with technology for over 9 years
• Affiliated with linear laser technology for 2 years
• Witnessed first hand pros and cons of laser cleaning
• European research
• Decided to build a better mouse trap HERE !
• Same Laser Source technology also in use today for ongoing
restoration effort at Notre Dame Cathedral
• Cleaned hundreds of anilox AND chrome rolls using our laser
technology to date
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Laser Cleaning Advantages
• A Better “Clean”
• Energy Efficient
• Low daily operating costs
• Low Maintenance
• No chemicals, No water
• No Media
• No Solid or Liquid Waste = Sustainable
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Effective and Precise
• Effective – Often only Solution that works:
✓ Heat Sealed Ethylene Acrylic
✓ Acrylic Coating W/ Wood Finish
✓ Co-Polyester
✓ 2% solids primer & platinum based silicon
✓ Nylon-based Epoxy Ctg
✓ High-Bond Abrasion Resistance Ctg
✓ Silicone Rubber
✓ Metallic-based coatings (tin, platinum, rhodium, others)
• Precise – Chrome Rolls too !
✓ Careful - Wrong Settings will cause Chromium Oxide build up
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How Does a Laser Work?
1) Laser energy absorbed by unwanted material2) Excites molecules3) Molecular bonds break4) Atoms / molecules get “ejected”5) Contaminants vaporized / “ablated”6) 3 Concurrent Processes✓ Photomechanical✓ Photothermal✓ Photochemical
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Safety: Laser Classes
• Class I: “Low Power”; Safe from all potential hazards (DVD player, Laser printer, OFF-PRESS ECLIPSE LASER)
• Class II: “Low Power”; avoid prolonged exposure to eyes; human “reaction” is sufficient safety measure (laser pointers, range finding equipment)
• Class IIIR / IIIB: “Intermediate Power”; may need to wear protective eyewear (spectrometry, light shows)
• Class IV: “High Power”; engineering and administrative controls must be followed; protective eyewear required (most industrial lasers fall into this category, PORTABLE ECLIPSE); safety requirements governed by OSHA
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Safety First…Portable System
• Eyes……………….YES
• Ears………………..NO
• Lungs……………...YES
• Skin………………..YES
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Class 1 VS. Class IV
Laser Safety Glasses Required
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Containment
• Objective: Keep anyone around work area from being exposed to laser light if not wearing glasses.
• How?
• Opaque Portable partitions
• “Curtain-style” partitions
• Whole Press vs. each station ?
• Off hours vs. regular shift work
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Containment Examples
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“Built-in” Containment
Gopfert Press
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Hycorr
Narrow Web Rolls too…
Quick Change Presses
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Eclipse Filter System
Item Portable Enclosed
(R1000/R2000)
Pre-Filter #1 35% @ 5 microns N/A
Pre-Filter #2 MERV 11 (85% @ 3
microns)
MERV 11 (85% @ 3
microns)
HEPA
(not washable)
99.97% @ .3 microns 99.97% @ .3 microns
Gas / Odor filter
(not washable)
Blended bonded carbon
(superior)
Blended bonded carbon
(superior)
Sensors ? Yes Yes
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Laser-Safe Cleaning
• Laser Scan Shape
• Laser Power (Watts – more is better)
• Laser Pulse Frequency (critical value)
• Other Parameters that Matter
– Traverse Speed
– Surface Speed
• Auto Shut-Off Feature
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Line Scanner vs. Circular Scanner
NO hot spots AND
2x as fast: Leading AND
Trailing Arches
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Auto Shut Off Feature
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On Press Set Ups
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Easy Focus System
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Laser Guided Focusing System
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Triangulation Ensures Proper Laser Focal Distance
Two Laser “Pointers”
Roll Laser Head
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Intuitive focusing system enables quick, precise focal depth each time
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Laser Guided System
Once 2 pointer beams become 1 System in Focus…
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1 Line = Perfect Focus
(critical for optimal cleaning results)
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And now a Short Video…
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What about my presses ?
• Cable length 15’ (can shift system as
needed)
• Focal distance 25 cm (+/- less than 1
cm)
• Similar to soda set-up – sometimes
more room needed
• Can laser light be contained 100%?
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Portable Laser System Recap
• Pros
– Leave “Problem” rolls in-press
– Tackle tough residues / “A Better Clean”
– Flexibility (Off Press option too…)
– Easy to use and maintain equipment
– No consumable inventory to manage or purchase
– No secondary waste stream
• Cons
– Additional Safety Requirements
– Extra Large Rolls not good candidates
– “Thick” Build Up will take longer…
– Initial Capital Investment