flatjet dispensing & printing technology copyright, 2004 © multimedia studio budapest- hungary
TRANSCRIPT
FlatJet Dispensing & FlatJet Dispensing & Printing TechnologyPrinting Technology
Copyright, 2004 © Multimedia Studio Budapest- HUNGARY
ObjectiveObjective
• The development of the The development of the technology technology is motivated by the is motivated by the gapgap between between production rate of a conventional production rate of a conventional offsetoffset and the and the digital digital systems.systems.
• Other ink-jet developers are Other ink-jet developers are searching solutions to searching solutions to reducereduce the the ejected ink quantity – our aiming ejected ink quantity – our aiming was opposite – the was opposite – the high flow ratehigh flow rate. .
The aimedThe aimedresolutionresolution
• The theoretical limit of the human The theoretical limit of the human eye’s resolution is 1’ angle – it means eye’s resolution is 1’ angle – it means that from that from 3 meter3 meter viewing distance, viewing distance, 1 1 mmmm size details can hardly be size details can hardly be distinguished. distinguished.
• Our basic objective was to find solution Our basic objective was to find solution to produce images for to produce images for large distancelarge distance observation with as high throughput as observation with as high throughput as possible. possible.
The resultThe result
• simple simple robustrobust construction, possibility construction, possibility of low production costsof low production costs
• very low & very low & extremely extremely high liquid flowhigh liquid flow
• Possibility of Possibility of media-widemedia-wide operating operating large-format digital systemslarge-format digital systems
• Individually replaceable printing Individually replaceable printing elements elements
Simple and easy to Simple and easy to manufacturemanufacture
• FlatJet is assembled of a metal plate FlatJet is assembled of a metal plate and tube, and a piezo-ceramic discand tube, and a piezo-ceramic disc
• Simple and relatively robust Simple and relatively robust mechanical constructionmechanical construction
• Conventional materials and Conventional materials and manufacturingmanufacturing
The liquid transferThe liquid transfer
• FFrom rom pico-literpico-liter range ejection range ejection up to up to 5050 microliters/smicroliters/s continuous flow continuous flow
PrinciplePrinciple
Plate resonator with piezoceramictransducer
Piezoceramic transducer(vibrating deformation)
PrinciplePrinciple
Tube length
Variation ofthe vibratingamplitude
Dis
pla
cem
en
t
OvertureResonance
Vib
rati
ng
m
ass
PrinciplePrinciple
One dropletcreating cycle
Multipliedroplet creating cycle
Vibrating amplitude
Vibrating amplitude
break-awaythresholdof droplets
break-away thresholdof droplets
Exciting
Exciting
Max %
Min %
Ejection processEjection process
Microscopic shot with high speed camera, with shifted exposure phases
Extent of Extent of deformationdeformationat the tipat the tip
Microscopic shot with stroboscopic backight, shifted phase
Local speed andLocal speed andacceleration at the acceleration at the tiptip• At 200 kHz frequency the periodical At 200 kHz frequency the periodical
speed of the tip surface is about speed of the tip surface is about 6 6 m/sm/s
• The acceleration at the dead point The acceleration at the dead point exceeds the exceeds the 11..000000..000 g000 g
Ejected volume Ejected volume versusversusdriving frequencydriving frequency
ejected liquid quantity with 1 ms excitation around the resonance frequency
0
5
10
15
20
190 192 194 196 198 200 202
frequency [kHz]
volu
me
[nl]
Ejected volume Ejected volume versusversusactivating timeactivating time
Ejected liquid quantity at different excitation time
0
5
10
15
20
0 200 400 600 800 1000 1200 1400
excitation time [microsecond]
volu
me
[nl]
PrinciplePrinciple
Inkconductingtube
Plate resonator
Ink
nozzle Jpiezoceramic
Side View Front View
ink spray
Application fieldsApplication fields
• Printing on ordinary materialsPrinting on ordinary materials
• Printing on special materialsPrinting on special materials
• Different applicationsDifferent applications– Chemical, Pharmaceutical or Chemical, Pharmaceutical or
Microbiological dispensersMicrobiological dispensers
– MoisturizersMoisturizers
Printing on Printing on ordinary materialsordinary materials
• Industrial media-wide Industrial media-wide large-format ink-jet printinglarge-format ink-jet printing
• Low cost media, low cost inks & low Low cost media, low cost inks & low operating costsoperating costs
• Wide variety of media & inksWide variety of media & inks
• Computer to print technologyComputer to print technology
Printing on Printing on special materialsspecial materials
• CeramicsCeramics
• GlassGlass
• WoodWood
• LeatherLeather
• ConcreteConcrete
• WallpaperWallpaper
• CorrugateCorrugated paperd paper
• PlasticsPlastics
• MetalsMetals
• ……etc.etc.
First IndustrialFirst IndustrialApplicationApplication
• Zimmer GmbH (A) Chromotex Textile PrinterZimmer GmbH (A) Chromotex Textile Printer
First IndustrialFirst IndustrialApplicationApplication
• Zimmer GmbH (A) Chromotex Textile PrinterZimmer GmbH (A) Chromotex Textile Printer
Hopes andHopes andExpectationsExpectations
• A NEW TECHNOLOGY CAN SUCCEED A NEW TECHNOLOGY CAN SUCCEED IFIF IT IS IT IS QUICKER OR BETTER OR QUICKER OR BETTER OR CHEAPERCHEAPER
• THE FLATJET CAN BE QUICKER & THE FLATJET CAN BE QUICKER & BETTER & CHEAPERBETTER & CHEAPER
QQUICKERUICKER
• PossiblePossible 1 sq. meter1 sq. meter per second per second printing speedprinting speed
• The printing width can be increased The printing width can be increased without limitswithout limits
BETTERBETTER
• High tone / color resolution High tone / color resolution (possibly (possibly 256 shade256 shade in a pixel) in a pixel)
• High color saturation High color saturation pigmentedpigmented inks inks
• Environmentally friendly Environmentally friendly water basedwater based inksinks
• High tolerance in ink parametersHigh tolerance in ink parameters(viscosity up to (viscosity up to 15 mPas15 mPas) )