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After more than thirty years of research and improvement of strong market demand
post time: 2013-5-9 | hits: 4861 |
After more than thirty years of research and improvement of strong market demand,corrugated cardboard flat piece of flexo printing machine has been quite great progress.Feed is not stable, alignment error, machine adjustment difficulties, ink scratches and dustproblems, has been greatly improved. To improve the degree of the unit by unit to do the analysis:
(a): the paper feeding unit feeding part of traditional to push back, often due to bending and unable to feed, and the feed can not guarantee the cardboard location resulting in alignmenterror. After the improvement for small area adsorption plate or roller to vacuum adsorption,can improve the above shortcomings, but the cause of deviation on the board due to lack oflarge area contact area will remain. In order to overcome these disadvantages the development of large adsorption contact vacuum suction paper feeding system, completelysolve these problems, and ensure the accuracy of a front feed.
(two) paper powder removing device: paper powder issue has been troubled by corrugated carton printing quality, the initial solution is with the brush and the dust removal, but the effect is not obvious, mainly because the dust often with electrostatic and firmly attached to thecardboard. The printing quality higher models are equipped with a high voltage dischargedust removal device, first remove the static and dust in order to improve the dust removaleffect.
(three) board conveyor: traditional printing press in the printing unit board conveyor to pull paper loop operation, pull the paper ring according to the need of different width and position adjustment board, but must be avoided to prevent scratching ink printing. In addition, thestage of the transfer operation due to bending degree board without influence of accuracy.Therefore the development of vacuum transfer system, transfer to the vacuum adsorptionand roller way cardboard, cardboard flat can be absorbed in the machine and stable in the printing unit transmission, beating and no unit stage, greatly improving the printing accuracy,and do not need by changing the order paper pulling ring position.
(four) printing ink system: Launch for ceramic roller is successful, now the flexo printing machine in addition to the traditional rubber guide roller, but also with the monolithic scraper,scraper trough system closed. In order to meet the different needs of different printing withink and screen printing unit density, flexibility is very important. Some manufacturers considerprinting unit and configuration guide rollers and rubber sealed tank scraper to adapt to thefull version and dot overprint. While the rapid replacement of France Martin company closed cell scraper system, using scraper can adapt to different full version and dot printing.Switzerland has company is based on the electric replacement ceramic roller device,equipped with two to three groups of roller in each printing unit can be replaced to finish in a minute, to adapt to a wider range of printing, printing the full version and dot overprint of up to 120L/inch.
(five) drying unit: to meet the increasing trend of the carton printing, four-color printing unit configuration of existing more than, in this premise, the drying device is required, one can improve the printing quality, two can improve the speed of production. Also in line processing,drying unit can be isolated after printing and processing (slotted cutting) process, so as to avoid the dust into the printing unit and the vibration influence the printing quality, drying unitas required and the number and arrangement of budget and.
Bobst models for multi-color printing and line light design, so each printing unit are equipped with hot air drying device, and in the last unit configuration of UV drying, so that the coatingultraviolet light oil.
The above is only the basic improvement of corrugated sheet printing machine, and otherequipment to further improve printing quality equipment, such as: independent motor unit, inkmonitoring and troubleshooting device etc.. Carton manufacturers should take the market demand is the most ideal equipment investment budget. It is foreseeable cartonpolychromatic high quality printing trend is inevitable.
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