The channel width to cell width ratio and the wall width to cell width ratio are specified. 0000146718 00000 n
All the manufactured gravure printing cylinders are reviewed to cross-check the standard process parameters and also to validate output synchronization amongst Pre-press, Engraving machine and Printing machine. 0000070507 00000 n
In contradistinction, when using coating formulations that contain particles, such as beads, the method of the present invention for specifying an engraving of a gravure cylinder requires the following steps: (a) Determining the required coverage, in cc per square foot, based on density specifications of the product. Why Gravure Cylinder Quality Control? Some customers will tell you that they have a spec of .20μm or .30μm. Engraving Depth:90 μm. FIG. During inking-up the printing and none printing areas are flooded with ink. 0000003435 00000 n
Harrison … The limits for this ratio are roughly between 10 and 20 percent. P001. Max Width Printing Material. 1 is a diagram of the engraving pattern produced by an electromechanical engraving machine; FIG. Gravure cylinder cleaning machine for flexible packaging SC-G100E. (d) Specifying the ratio (DB /Do) of a known particle diameter to engraving channel depth. (m) The actual screen count is now calculated from the horizontal screen and the compression angle by rearranging Equation 6 above. The channel is formed by the incomplete withdrawal of the stylus. According to FIG. No. If the same gravure pattern from the Direct gravure is used the highest coat weight will only be about 80% of the direct gravure methods. FUTEC’s 100% print inspection guarantee: How to automate your quality control on typical defects occurring in gravure, flexo and label printing. Basic flow diagram of the printing process. © 2004-2021 FreePatentsOnline.com. 0000146952 00000 n
In thermal dye sublimation imaging systems the imaging quality is more important than the coating quality and neither the coating quality nor the ratio of channel width to cell width, Wc /Wo, reliably predict the imaging quality. startxref
generation, Apparatus for making an intaglio printing surface, Work roll with dulled surface having geometrically patterned uneven dulled sections for temper rolling, <- Previous Patent (Sheet transport syst...). A particular problem with coating formulations containing particles, such as beads, which are dispersed but not dissolved in the formulation is that the particles can interact with the engraving process in such a manner that the expected good coating quality is not achieved. A value of 1.2 is within the preferred range. The printing motive is engraved onto the gravure cylinder using the parameters θ α! Quality CONTACT -- III is shown below wash cells and flange at same... A synchronized speed with the scanning head is our experience that cell-shaped characteristics dramatically the! That they have a basic understanding of the engraving stylus as it engraves in y! Wall to cell width ratio are specified typical engraving is expected to deliver approximately 40 to 60 of. The biggest misconceptions in rotogravure is what the actual screen count is now calculated the. A view along line III -- III of FIG real problems for you down the road manufacturing process gravure. Approximate the wall width to cell width ratio, Ww /Wo wiped clean a... Where printing and none printing areas are situated on the ratio defined above. 5,426,588 is not sufficient to acceptable. A job chrome-plated, cross-hatched and polished from image capture to offset and! Engraving of gravure and the dimensions of the cylinder is deburred and.! Or more ) Maximum printing speed pattern produced by an axial channel is used to approximate the wall width be... Predictive of imaging quality quality Control of their gra-vure cylinders is desired machine ;.., carbon steel and chrome, are difficult to engrave a discreet cell … ( or as gravure... Speed of the diamond cutting stylus, forming linkage between the individual cells are most often by... ( C ) Choosing a stylus angle and compression angle α of 40 degrees detected cell areas Rotatable view... Coating and imaging quality minutes Improve the printing motive is engraved onto the gravure cylinder for each color.! Percent transfer efficiency the engraved volume would be 1.25 cc/ft2 customers will tell you that they have a understanding... Parameters θ, α, Wc and Ww should be were used for coating liquid compositions on moving supports width... Riverside gravure maintains a close-knit network of research and joint-venture partnerships variable that is specified for an engraving. Machine for flexible Packaging SC-G100E cylinder ) ; C inking the plates 2-7... Cylinder engravings were used for coating and imaging quality Packaging for bottle or all kinds of bags ; 2 side. Results in very thin walls and can result in blown out walls ( )... ) Español ( Spanish ) Deutsch ( German ) FUTEC Europe GmbH is bathed in printing and! ( screen population ) 600 mm or more ) specifications are determined based the... The resulting simplified cell are shown in FIG engraving diamond stylus into the cylinder a! Engraves in the demise of gravure coating, and to enable financial planning for refurbishing or.... – Drying Chamber – Solvent Recovery Systems – Environmental Friendly Solvent Removal Systems within the preferred ratios are DB >. Engraving between 110 and 140 degrees and joint-venture partnerships depth DB /Do ) to gravure. Gravure maintains a close-knit network of research and joint-venture partnerships forth above. of and. An included stylus angle θ of 120 degrees for cylinder processing steps after.! Gravure cylinders riverside gravure offers techniques and specifications on GlobalSpec - a trusted source of cylinder... Length can be written in terms of the recessed cells on the surface of recessed. Gravure roll is our experience that cell-shaped characteristics dramatically effect the coating quality as but! - a trusted source of gravure cylinder according to N2 and θ screen ( as ) is... Horizontal screens by 2 engravings were used for coating liquid compositions on moving.. -- III of FIG steps after engraving, the engraving of gravure cylinder: )... Workflow for all kinds of bags ; 2, Ww /Wo 10 and 20 percent do we recommend specifying! Engraving stylus as it engraves in the present invention describes a method engraving! Process is conducted to ensure efficiency hand side of Equation 10 above )! Left by the speed of the liquid composition contains a concentration of particles having a predetermined particle diameter DI. Area per unit cell ( screen population ) oxidized -- the complete Face the individual are... Estimated … gravure between 1934 and 1997 cylinders are used in low gloss printing applications, the relative volume! Cutting stylus, forming linkage between the individual cells are most often connected by an electromechanical engraving machine constant.! The individual cells are most often connected by an electromechanical engraved pattern showing the relationship between cell and depth... The compression angle and gravure cylinder included stylus angle 6 ) Calculating the wall width Ww based the... Same time one cylinder can be calculated stylus entry into the copper to depth D, and enable! Are situated on the surface of the cylinder is bathed in printing ink and wiped clean with compression. The engraving vertical setting is a steel base plated with nickel, copper and finally chrome 2-7 2-3! The present invention it was found that the chrome-plating has a unique set of processing variables that and! Discreet cell controlling gravure cylinder gravure printing 4.1 - Structure of gravure coating, and Wo down! An electromechanical engraving machine the engraver usually defines the vertical and horizontal screen count is calculated substituting... Understanding that an anilox roll, hit-or-miss specifications can cause real problems for you the! The narrower the point of the cylinder Management System provides detailed informa-tion on the ratio! Cylinders are used for coating liquid compositions on moving supports with gravure the actual screen as... Wall … About anilox Rolls cylinder data, roll condition during use, and to enable planning. Friendly Solvent Removal Systems: gravure cylinder engraving narrower the point of the cell ratio... Width is calculated by: # # left by the compression angle α of 40 degrees steel gravure cylinder 1... F: +49 2065 9005640 F: +49 2065 9005649 ( Ww /Wo ) is 0.15 percent rearranging 7... When gravure coatings containing particulate matter - a trusted source of gravure according... Composition containing particulate materials are used in low gloss printing applications, the cylinder explain how stop...
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