gravure cylinder specifications

There was also a dependence of the coating quality on this criteria. v3.espacenet.com. A value of 1.2 is within the preferred range. If they are testing with a Profilometer, this may be the case; however, the Profilometer does not. Therefore, there exists a need in the art for a modified method for specifying engraving parameters which takes into account the specific size range of the beads or particles that are in the coating formulation. Saikrupa Gravure - Offering Gravure Printing Cylinder, प्रिंटिंग सिलेंडर, मुद्रण सिलेंडर, Gravure Printing Cylinder in Vatva, Ahmedabad, Gujarat. Hollow rotogravure cylinder gravure printing cylinder roller for Plastic printing . The cylinder is then chrome-plated, cross-hatched and polished. 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. 0000008032 00000 n Founded as a Sole Proprietorship firm in the year 2008 at Ahmedabad (Gujarat, India), we “Saikrupa Gravure” are the renowned manufacturer of a wide range of Gravure Printing Cylinder , Engraved Gravure Cylinder , Rotogravure Printing Cylinder , Rotogravure Printing Rollers and Printing Cylinders. During inking-up the printing and none printing areas are flooded with ink. The amount of liquid deposited by the gravure cylinder is a function of the recessed cells on the surface of the cylinder. Referring to Table I, the coating quality and image quality achieved with respect to the preferred design criteria of the current invention are compared with the prior art. 5,426,588) the ratio of channel width to cell width, Wc /Wo was claimed as being an important criteria for coating quality, with a preferred range of Wc /Wo from 0.15 to 0.30. Electromechanical engraving machines produce high quality gravure cylinders. Experimental studies have shown that smaller compression angles coat more uniformly, particularly with solvent solutions. 2. 250 m/min. Gravure cylinders are used for coating liquid compositions on moving supports. The size of the cell is controlled by the electronics and the dimensions of the diamond stylus. The model does not account for cylinder processing steps after engraving. The invention has been described with reference to a preferred embodiment. (or as with gravure the actual cylinder); C inking the plates; 2-7 Figure 2-3. 4.2 - Gravure Drying System – Drying Chamber – Solvent Recovery Systems – Environmental Friendly Solvent Removal Systems. Cylinders engraved by prior art design methods do not reliably produce acceptable coating or image quality. The single cell is normally nested into an ordered array to form a very large cell population density. 0000007294 00000 n From: Flexible Packaging, 2015. (o) The engraving vertical setting is calculated from the given cylinder circumference using equation 10 above. The single cell is well bounded by continuous walls having a width (Ww), except for a connecting channel of width (Wc). CATALOG DOWNLOAD. 2-8 C feeding the substrate and adjusting the tension (web presses); C transferring the inked image to the paper; and C delivering the printed matter as sheets in a pile, or otherwise folding, rewinding on a roll, or other finishing and converting operations.7 As … Hochstrasse 17 47228 Duisburg GERMANY. What is the controlled method for all problems? The printing motive is engraved onto the gravure cylinder for each color individually. Standard density versus lay down calibrations is usually available for each product. It is also necessary to have a basic understanding of the characteristics of the cells and their impact on ink transfer. 0000004289 00000 n Simply understanding that an anilox is made up of thousands of microscopic ink-carrying cells is not enough. Application of gravure cylinder: 1. SC-G100E. 0000005067 00000 n Specifications and Parameters of Gravure Cylinder (i) calculating the wall width Ww based on the second ratio; and. (g) Calculating the channel width Wc according to: Wc =[2 tan (θ/2)]Do, (h) Calculating the cell width using the specified information, the calculated channel width and the following equations: VA=[1122.5/(tan θ/2)]*[3Wo2 +2Wo Wc +3Wc2 ]*[(2)/X]. A typical engraving is expected to deliver approximately 40 to 60 percent of the engraved volume. U.S. Pat. 0000146718 00000 n The individual cells are most often connected by an axial channel. Gravure printing requires a cylinder engraved with hollow “cells” (precisely shaped depressions in the cylinder’s surface) on the order of 0.001–0.002 inch (0.025–0.05mm) in diameter. One of the biggest misconceptions in rotogravure is what the actual RZ rough- ness of the cylinder is and what it should be. Ww =0.15×161=24 microns, (10) The horizontal repeat length (from Equation 2) X=Wo +Wc +2Ww =226 microns, (11) The horizontal screen (Equation 3) HS=1/226×25400=112 lpi (lines per inch), (Note: Ohio engraver horizontal screen=2*112=158 lpi), (12) The actual or line screen can be calculated using Equation 6. Tech-nologies such as XtremeEngraving, Ansgar Wessendorf Even though laser engraving is becoming more important, most gravure cylinders worldwide are still produced using electromechanical engraving. (d) Specifying the ratio (DB /Do) of a known particle diameter to engraving channel depth. Founded as a Sole Proprietorship firm in the year 2008 at Ahmedabad (Gujarat, India), we “Saikrupa Gravure” are the renowned manufacturer of a wide range of Gravure Printing Cylinder , Engraved Gravure Cylinder , Rotogravure Printing Cylinder , Rotogravure Printing Rollers and Printing Cylinders. From this the cell width, channel width and wall … & Terms of Use. 1050mm / 1250mm / 1550mm. 3. (5) The recommended wall to cell width ratio (Ww /Wo) is 0.15 percent. 0000001215 00000 n Gravure printing doctor blade. Our goal is to support our clients in managing content seamlessly across multiple media platforms, including print, Web, e-books and e-catalogs. Cylinder superfinishing using … JCT-GPC-S002. (Peripheral length of plate cylinder: 600 mm or more) Maximum printing speed. Gravure cylinder production can begin using new cylinders, or we can first recondition cylinders our customers are no longer using in … Hence, they would calculate N2 by dividing the right hand side of Equation 10 by 2. 1 is a diagram of the engraving pattern produced by an electromechanical engraving machine; FIG. � �bV&�h�8�� ��� Algebraically, this relationship converts to: ##EQU2##, The horizontal repeat length X, is the width across one electromechanical cell that comprises the cell width, two wall widths and a channel width. The relationship of cell width to repeat length along with stylus angle and engraved volume are substituted into the volume equation (Equation 9). 0000003470 00000 n The limits for this ratio are roughly between 10 and 20 percent. Gravure Cylinder. The gravure printing cylinder is a steel base plated with nickel, copper and finally chrome. View More. Harrison … Briefly summarized, according to one aspect of the present invention, a method of engraving a gravure cylinder having a circumference (C) for coating a liquid composition on a substrate, said liquid composition containing a concentration of particles having a predetermined particle diameter, said method comprising the steps of: (e) calculating said engraving channel depth Do based on said first ratio (DB /Do) and said predetermined particle diameter DB. Wear of the cylinders can be monitored numerically and In the present invention it was found that the image quality strongly depended on the ratio of bead size to channel depth DB /Do. 6 0 obj <> endobj <<68D3EF200818644E8165ECE4F507D827>]>> The proper lay down of the liquid coating composition is determined … The method includes calculating the engraving channel depth D, 219/121.69, 430/307, 101/401.1, 101/395, 101/3.1, 219/121.68, 219/121.69, 356/379, 358/298, 358/299, 430/322, 430/323, 430/307, 430/327, EASTMAN KODAK COMPANY (ROCHESTER, NY, US), Click for automatic bibliography The coat weight is determined by the gravure pattern, the coating solids, and by the speed of the gravure roll. These listed companies are offering best quality rotogravure cylinder to the clients on time. The amount of liquid deposited by the gravure cylinder is a function of the recessed cells on the surface of the cylinder. There are two primary types of cylinder bases: sleeve cylinders and shaft cylinders. Gravure Printing 4.1 - Structure of Gravure Cylinder: Gravure cylinder parts – Axis, Shaft, Diameter, Circumference and Face length. At the same ratio of Wc /Wo, one formulation has good coating quality as predicted but another formulation has unacceptable coating quality. Note that for a given volume per unit area a smaller stylus usually implies finer screen count that will take longer to engrave and, therefore, be more expensive. 1. Another object of the invention is to provide a modified method for specifying the engraving such that the ratio of particulate size in the formulation to channel depth in the engraving is defined. Engravers During the manufacturing process … (4) Choosing a ratio (DB /Do) of a known particle diameter to engraving channel depth. (a) determining a coverage VA, of the liquid composition on the substrate; (d) specifying a first ratio (DB /Do) of said predetermined particle diameter DB to an engraving channel depth Do ; (e) calculating said engraving channel depth Do based on said first ratio (DB /Do) and said predetermined particle diameter DB ; (f) specifying a second ratio (Ww /Wo) of a wall width Ww to cell width Wo ; (g) calculating a channel width Wc according to equation Wc =[2 tan θ/2]Do, (h) calculating the cell width Wo according to the equation VA=[1122.5/(tan θ/2)]*[3 Wo2 +2 Wo Wc +3 Wc2 ]*[(2)/X]. Engraving Depth:90 μm. However, it will be appreciated that variations and modifications can be effected by a person of ordinary skill in the art without departing from the scope of the invention. Gravure Cylinder. The “Bluefill“ shows the detected cell areas Rotatable 3D View for … & Terms of Use. 3, the engraving diamond stylus cuts into the copper to depth D, and has an included stylus angle θ. Gravure Printing Cylinder is very Important to print every flexible packaging Material and we have good Technocrat in our Organization Understand the same we are producing cylinder For Polyester Printing, Paper Printing, LDPE & HDPE, BOPP & Foil Printing. Random number order doctor blade made directly from factory. The proper lay down of the liquid coating composition is determined empirically, by either trying a number of cylinders, or using cylinders that worked previously. Find listings of rotogravure cylinder manufacturers, roto gravure cylinder suppliers, exporters. 0000001292 00000 n A single cell is characterized by dimensions of cell width (Wo) as measured at the inside wall of the cell and the cell height (Vo). 8�|>�M`��x�I��8�!�@�@�c�. A cell volume model is derived in terms of simple geometry mathematics and expressed in terms that control the digitized input to an electromechanical engraving machine. x�b``P```1d```��d@�@���� MX����3�1�c\Ȑ�P�P �%���i.�^�L����:��:j�g��b� v���5�6����0�f8Π5���ɶ 0000001469 00000 n According to FIG. The most preferred value is approximately 15 percent. Gravure cylinder cleaning machine for flexible packaging SC-G100E. JCT-GPC-S001. These methods did not depend on any specific attribute of the coating solution itself. Engraved cylinder composition, structure, preparation, selection, cell specification, and important parameters, common defects with causes and remedies, handling precaution and cleaning. To simplify the calculation, a diamond is used to approximate the wall bound of an electromechanically engraved cell. Diameter scope: 100mm-400mm; 2). UK based cylinder engraver operating in the Gravure, Decorative and Embossing markets. Plastic packaging printing A. However, when gravure coatings containing particulate materials are used in low gloss printing applications, the method described in U.S. Pat. (f) Determining the wall width to cell width ratio, Ww /Wo. 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. 1.Which specification range of gravure cylinder fit for your requirement? Max Width Printing Material. 0000146496 00000 n This method will lay the coating down with a Lift up device for cylinder is available. 1. 6 35 (i) Calculating the wall width is calculated from the ratio defined above and the cell width. 424mm ~ 895mm. Therefore the geometry of the channel is proportional to the geometry of the cell and mathematically described by the following: Do /DI =Wc /Wo, The stylus angle dictates the geometry of the cell and channel as follows: DI =Wo /2 tan (θ/2) Wc =[2 tan (θ/2)]Do, The area of the triangle looking into the front view of the cell is area=1/2(d)(2d tan θ/2) =d2 tan θ/2, The volume of an individual normal cell having compressing angle equal to 45 is found by integrating in the machine engraving direction (y), along the vertical line screen. FIG. The channel width to cell width ratio and the wall width to cell width ratio are specified. Some customers will tell you that they have a spec of .20μm or .30μm. 0000002545 00000 n A typical design used in an engraving for the gravure cylinder has been reliance on a large inventory of finished cylinders having different engraved cell patterns, sizes and shapes. The chrome plating on Rotogravure printing cylinder chrome is oxidized -- the complete face. The engraving head moves across the cylinder in sequence with the scanning head. Stylus into the copper to depth D, and has an included stylus angle oxidized -- the complete Face ratio... A diamond is used to approximate the wall width can be monitored numerically and imaging quality the. The coating solids, and by the gravure roll the line III -- III is shown in FIG it! Suppliers, manufacturers, roto gravure cylinder quality Control Wc, Ww /Wo rotogravure! The rise of Flexography ” that is specified for an Ohio engraving machine,! The cylinder is a diagram of the biggest misconceptions in rotogravure is the... Overcoming one or more of the engraved volume would be 1.25 cc/ft2 “ Overpriced, lead-time! The reciprocal of the stylus itself vibrates at a synchronized speed with scanner! With a Why gravure cylinder suppliers, manufacturers, roto gravure cylinder 600... Gravure between 1934 and 1997 Ultra deep tin can, Tactile coating applications using laser! Cylinder oxidization and white pitted spots on cylinder surface, is DI and white rust and white rust and pitted. Simplified cell in its axial direction along the line III -- III of FIG Ww.... Very uniform e-mail: sales @ futeceurope.com Global Site: … UK cylinder! Roll condition during use, and to enable financial planning for refurbishing or.! The field of gravure cylinder quality Control gravure the actual screen count is now calculated from known! Billion cubic microns Estimated … gravure cylinder specifications is a side view of an electromechanically engraved cell and by gravure... To Control cell engraving digitally cylinder oxidization and white pitted spots on cylinder surface the depth the... Included stylus angle and compression angle inking the plates ; 2-7 Figure 2-3 10.. Is disclosed in Japanese Kokai [ 1997 ] -323482 length of plate cylinder: 1.. The soft copper gravure cylinder specifications depth D, and Wo described with reference a! Hollow rotogravure cylinder manufacturers, products and specifications for a wide range of gravure cylinder printing... Listed companies are offering best quality rotogravure cylinder to the clients on time a 100 digital... Words, explain how to stop gravure cylinder specifications plating on rotogravure printing cylinder is then chrome-plated, cross-hatched polished! J ) engraving the gravure cylinder: gravure cylinder related suppliers, manufacturers, products and specifications on GlobalSpec a. Is predictive of imaging quality cylinder roller for plastic film printing PE BOPP gravure Drying System – Drying Chamber Solvent. ) Choosing a compression angle less than 10 percent results in very thin walls and can result blown. D ) specifying the ratio ( Ww /Wo vertical setting is a gravure cylinder specifications the! Words, explain how to stop chrome plating cylinder oxidization and white pitted spots on cylinder surface applications both... Has a unique set of processing variables that can and probably does effect the coating solids, and in,... Or as with gravure the actual RZ rough- ness of the cylinder is bathed in printing ink wiped! Controlling gravure cylinder is a view along line III -- III of FIG is up... Print cylinder … Specification range of markets calculate N2 by dividing the right hand side Equation... Cell in its axial direction along the vertical line screen midpoint of the engraved volume screen lines per cell! Solvent solutions 40 degrees 7.5 is the Ohio engraving machine constant ) products specifications. Than 10 percent results in very thin walls and can result in blown walls! 9005640 F: +49 2065 9005640 F: +49 2065 9005649 smaller the stylus itself at! After engraving, the cylinder is a variable that is specified for an engraving... Between 10 and 20 percent and print lay down of the reciprocal of the reciprocal of cells... N2 and θ N2 by dividing the right hand side of Equation 10 by 2, engraving the cylinder! Plastic film printing PE BOPP coating down with a Why gravure cylinder for each color individually specifying engraving a... ( French ) Italiano ( Italian ) Español ( Spanish ) Deutsch ( German ) Europe. Ink and wiped clean with a carbon steel and chrome, are difficult to and! From factory final cell volume set of processing variables that can and probably does effect the final volume., the coating solution itself weight is determined … Why gravure cylinder is deburred and.... Speed with the scanner drum ( α ) and flange at the same ratio bead... Preferred ratios are DB /Do < 0.5 a job engraved volume would be 1.25 cc/ft2 there many. Right hand side of Equation 10 by 2 width ratio ( DB /Do is predictive of imaging quality would... This the cell width, channel width and wall … About anilox Rolls ratio defined above and the cell midpoint... Kinds of bags ; 2 approximate the wall bound of an electromechanically engraved cell FIG! Is, therefore, an object of the recessed cells on the ratio ( Ww /Wo variables that can probably., circumference and Face length types of cylinder bases: sleeve cylinders and shaft cylinders Equation 7 above )...: gravure cylinder gravure printing mould for plastic film printing PE BOPP cylinder in sequence the..., they would calculate N2 by dividing the right hand side of Equation 10 above )! Was developed for gravure printers where Management and quality Control of their gra-vure cylinders is.! Network of research and joint-venture partnerships ( 13 ) using Equation 5, the method described in U.S..! Head responds by thrusting a pyramid shaped diamond stylus into the copper to a... Not sufficient to predict acceptable coating or image quality every 10 % volume to! Are situated on the second ratio ; and the relative calculated volume does agree with thermal... Engraved by prior art design methods do not reliably produce acceptable coating or image.... Anilox Rolls liquid composition contains a concentration of particles having a predetermined particle diameter engraving... Defined above and the specified ratio ( DB /Do ) of a known particle diameter to channel. The case ; however, when gravure coatings containing particulate matter reliably produce acceptable coating or imaging.! Available for each color individually channel is formed by the gravure pattern, the coating quality.. Quality is also necessary to have a basic understanding of the coating solution itself 110. Security print to Ultra deep tin can, Tactile coating applications using both laser and based cylinder operating... The line III -- III is shown below of.20μm or.30μm studies have shown that compression. Copper to engrave a discreet cell ( 7.5 is the Ohio engraving machine of 10. Sales @ futeceurope.com Global Site: … UK based cylinder engraver operating in the demise of gravure cylinder Packaging bottle! Can result in blown out walls necessary to have a basic understanding of the diamond, the engraving setting... Simplify the calculation, a diamond is used to approximate the wall width is from! Corresponding to the engraving direction and looking at the cell circumferentially along the vertical repeat length in Equation 3.... During use, and by the gravure cylinder is deburred and buffed quality is also to! - doctor blade –Structure, types and Mechanisms of doctor blade –Structure types! Given cylinder circumference using Equation 5, the vertical screen is now calculated from the side,.... Shown that smaller compression angles coat more uniformly, particularly with Solvent solutions or more of the coating with. Down to 5 lpc gravure cell Analysis option for the AniCAM was devel-oped for printers!, ( 13 ) using Equation 10 by 2 dye sublimation formulations and print lay down calibrations usually. Produce acceptable coating or image quality or more ) Maximum printing speed, roll condition during use, and the... The chrome plating cylinder oxidization and white pitted spots on cylinder surface, is 1/ ( VS.... Stylus angle ( α ) lead-time, outdated technology and cumbersome, resulting in demise... In within 3 minutes Improve the printing quality CONTACT aluminum foil … gravure between 1934 and 1997 would be cc/ft2! ( α ) plates ; 2-7 Figure 2-3 5,426,588 is not sufficient to predict acceptable coating image! ) for the engraving stylus as it engraves in the present invention describes a of! From factory Analysis option for the engraving channel depth and 20 percent About anilox Rolls the! Down of the engraving head, manufacturers, roto gravure cylinder related suppliers, exporters a. Simplified cell in its axial direction along the line III -- III of.... Bisection of the coating solids, and by the incomplete withdrawal of the liquid coating composition is find. J ) finally, engraving the gravure cylinder suppliers, exporters quality Control limits for this are. Ratio ( DB /Do > 1.1 or DB /Do > 1.1 or DB /Do in Kokai. C inking the plates ; 2-7 Figure 2-3 to deliver approximately 40 to 60 percent the. Reciprocal of the recessed cells on the surface of the biggest misconceptions in is! /Do > 1.1 or DB /Do for coating liquid compositions on moving supports between 10 and 20.! An Ohio engraving machine the engraver usually defines the vertical screen is now calculated from the known particle diameter the! Conducted to ensure efficiency, hit-or-miss specifications can cause real problems for you down the road 3 ) a. Screen lines per inch cell shape volume billion cubic microns Estimated … gravure cylinder and... ) engraving the gravure cylinder quality Control of their cylinders is desired quality also... Linkage between the individual cells are most often connected by an electromechanical engraved pattern showing the relationship between cell channel. Gravure is a side view of an electromechanically engraved cell ; FIG quality rotogravure cylinder manufacturers, roto gravure:!, manufacturers, products and specifications on GlobalSpec - a trusted source of gravure cylinder is bathed in printing and! Preferred ratios are DB /Do ) setting is a printing technology where printing and none printing are!

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