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ontrolling ink flowin the flexo press is vital fo fa


for fast set-up ve


veArticle -Fl exoTechnolog Te


corporate sustainability. Ta exclusively to Converter, Henrik Kristensen, vice president, TRESU Ancillary, TRESU Group, says that the key to control is to enclose and automate the ink flow, fromthe bucket via an ink supply system, through the chamber, to the point at which it arrives in the cells of the anilox roll. This is the basis fofor a harmonious, precise regulation of flow, pressure and viscosity,which in turn determines ink density,


times, quality consistency and Talking


Maximisingpreng resspro C


comprising viscosity, flow rate and density presets that can be recalled. Calibration, therefore, is automatic. The supply systemreturns inks to the bucket and cleans the chamber withoutmanual intervention.


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Automation allows fafast setups to occur simultaneously instead of consecutively. Cleaning cycles are at themost 15minutes for all chambers – andwith solvent inks this can be as lowas fiveminutes – sa ving hours o f cleaning time per shiftft. Automation ensures exact proportions ofwater and detergent are used in the


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unifoformity of coverage and dot gain. The supply systemautomatically maintains a constant, pre-determined flow-rate, replenishing the chamber at finely calibrated


cleaning cycle. Significant ink savings are achieved: Vo


Volumemeasurement


is accurate to one litre, enabling the return of about 90 per cent of the ink or coatingmediumto the bucket after production per printing station. This can bring five-figure savings sums annually.


ft rates, as the rotating anilox roll receives the ink into the cells. Its softftware stores job recipes


CLEAN, SAFE ENVIRONMENT The chamber doctor blade prevents leakage, splashing, vapour emissions and contamination of the ink by air. This is assisted by correct blade positioning, use of rubber seals, and precise regulation of flowpressure, forming awall of ink between the blade and the rotating anilox roll, to stop air bubbles entering. A clamp allows the slotting of doctor blades into position and easy release,


A CLEAN SAFE ENVIRONMEN T fo


keeping changeover times as lowas oneminute.


og y roductiivitvity Chamber doctor blades are


available fofor all flexo applications, fromclosed-cassette chambers fofor label presses, to 6,000mm-wide types for corrugated board printing. Carbon fibre chambers offe weight fofor better handling and optimumresistance against


fo ffer lowest


INKING AND CLEANING IN ONE The newest chamber fofor wide-web printing is an all-in-one concept, comprising a chamber doctor blade, inking systemand cleaning system. O


corrosive fluids with high pH values. INKING AND CLEANING IN ONE


ne example is integrated


TRESU’sMaxiPrint chamber, in widths from1,600-6,000mm. Its integrated cleaning nozzle with low-pressure water-shot


ffersmyriad benefits, including: Cleaning times ofminutes per job instead of hours; elimination of repeat entry of ink recipe data; consistent colour targets and even ink coverage throughout the job and fromone job to the next; no evaporation - a safefer,more eco-


mechanismcleans the chamber and anilox roll fafast. It is emptied quickly so ink residue can be washed away aftfterwards befofore it dries. Ink changes and cleaning cycles are typically completed within approximately fiveminutes. Whether supplied with new presses or retrofitted to existing machines, the enclosed system offe


t:MaxiPrint carbon fibre chamber friendly working environment; and


ft:


reducedmanual intervention and reduced chance of human error.


www. w.tresu.c.com


he CAMIS SleeveMASTERHD, based on the Irisleevemachine (seen right, after a recent installation in the UK), combines simplicity accuracy and repeatability; this ergonomic attention to detail is also applied to the technical andmechanical processes and thematerials used, to guarantee a perfectlymounted sleeve that gives ‘dot on dot’ accuracy and consistent TIR applications needed by HD flexo applications. Camera andmandrel positioning are both controlled by an industrial CN unit, programmable via a touch screen interface that allows the operator to set the job quickly and store it fofor future use. The image capture systemis composed of two powerful digital cameras with highmagnification lenses and integral and full width LED illumination. The accurate focus system allows the CAMIS SleeveMASTER to identify anomalies that auto focus systems wouldmask. The ‘best focus’ feature, included in the software package, allows the operator to quickly find the best focus conditions. The captured images are viewed on a wide full HD screen, which guarantees perfect visibilit y and easy registration of the plates. The CAMIS SleeveMASTERHD also features new control and check facilities as well as a high-end HD graphics package specifically designed for the advancements made in high-resolution HD plates.


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The SleeveMASTERHD is equipped with an improvedmotorised plate- mounting table that allows both wide width single and narrowermultiple plates to be positioned without touching the tape; it also allows the plate to be seen without distortion and hence increases the overall tolerance to


34 September 201 6


Newtools for HD fle o applications T


HDflexo applications


registration. The special plate-mounting roller applies the plate under an even pressure with consistent bond strength, ensuring the removal of all air bubbles, over stretching and skewing which are associated withmanual operation. Thismeans that the printer always has a set of sleeves, which all conformto the same pressures on highly consistent TIRs. www.


w.rotocamis.it www. w.e.eurog av. ograv v.co.uk www.convertermag.co.uk


op:Henrik Kristensen holdining the 6m- wide carbon fibrere chamber;r; Above Th in situ at Tr amaj Left


Top To Kr ajor supplier of flex


ve: The F10 iCon ink supply syly system TririoplastNyborgrg inDenmarkrk – exible packaging;


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