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Gravure cylinders are used for coating liquid compositions on moving supports. View More. startxref x�b``P```1d```��d@�@���� MX����3�1�c\Ȑ�P�P �%���i.�^�L����:��:j�g��b� v���5�6����0�f8Π5���ɶ Get contact details and address| ID: 12211712048 Steel gravure cylinder gravure printing mould for plastic film printing PE BOPP. All rights reserved. The engraver would empirically change the cell depth to increase or decrease fluid deposit lay down with a minimum concern for cell geometry effect on coating quality. (p) engraving the gravure cylinder according to N2 and θ. 4 shows the cell geometry left by the in and out stroke of the engraving stylus as it engraves in the y direction. 424mm ~ 895mm. 0000006507 00000 n The present invention describes a method for engraving a gravure cylinder. 0000146496 00000 n However, when gravure coatings containing particulate materials are used in low gloss printing applications, the method described in U.S. Pat. (h) calculating the cell width Wo according to the equation VA=[1122.5/(tan θ/2)]*[3Wo2 +2Wo Wc +3Wc2 ]*[(2)/X]. Riverside Gravure can … The invention relates generally to the field of gravure coating, and in particular, to controlling gravure cylinder engraving. Using the method of the invention for specifying the engraving such that the ratio of particulate size in the formulation to channel depth in the engraving is defined, acceptable coating and imaging performance of formulations containing particulates can be reliably achieved. No. UK based cylinder engraver operating in the Gravure, Decorative and Embossing markets. gravure between 1934 and 1997. ##EQU9##, (13) Using Equation 5, the vertical repeat length can be calculated. V) Cylinder Proofing. 5,426,588 is not sufficient to predict acceptable coating or imaging performance. FIG. Five different cylinder engravings were used for coating and the samples were evaluated for coating and imaging quality. The aspect of image quality is more important when these types of coatings are used in thermal dye sublimation imaging systems and the image quality is shown to be strongly dependent on the ratio of bead size to channel depth DB /Do. We can produce completely according to your requirement. Finally, what gravure cylinder specifications do we recommend? 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. TABLE 1 Invention Prior Art Coating Criteria Criteria Coating Image Disp Cyl DB /Do Wc/Wo Quality Quality A #K38 1.5-2.25 0.09 light streaks Good A #17 1.2-1.8 0.11 heavy streaks Good A #16 1.3-0.9 0.15 heavy streaks Slight interference pattern A #K36 0.6-1.0 0.19 heavy streaks Significant interference pattern A #18 0.5-0.7 0.22 heavy streaks Significant interference pattern B #K36 0.4 0.19 very light streaks Good B #18 0.3 0.22 no streaks Good C #16 2.9 0.15 no streaks. Using only the design criteria and method of the prior art, without including the impact of the particulates in the formulation will not reliably provide acceptable coatings or imaging layers. 0000047021 00000 n (l) The horizontal screen count is calculated by substituting the value of the horizontal repeat length in Equation 3 above. 1. 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. Doctor blades, role, categories, angle, configuration, and possible problems due to doctor blades with its cause and remedies including handling & storage of doctor blades. In prior art (U.S. Pat. Why Gravure Cylinder Quality Control? With its major influence on all aspects of British stamp production for so many decades, the story of how Harrison created its cylinders is described here. Diameter scope: 100mm-400mm; 2). 0000135384 00000 n The surface of the copper layer is then finished to the required dimensional and surface specifications whilst removing any inaccuracies inherent in the copper plating. It is our experience that cell-shaped characteristics dramatically effect the coating quality uniformity. 0000003470 00000 n Cylinders #K38 and #17 were designed according to the method outlined in the above embodiment, cylinders #K36, #16 and #18 were designed using prior art methods. The invention has been described with reference to a preferred embodiment. Because of the importance and complexity of the engraving process, empirical relationships that describe the dependence of cell geometry characteristics on engraving process specifications and control parameters exist. The present invention has numerous important advantages over the prior art including: it enables the optimization of image gloss level; and, it produces an image free of light interference artifacts. JCT-GPC-S002. 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. Wash cells and flange at the same time One cylinder can be cleaned in within 3 minutes Improve the printing quality CONTACT. 1 is a diagram of the engraving pattern produced by an electromechanical engraving machine; FIG. Some customers will tell you that they have a spec of .20μm or .30μm. It is also necessary to have a basic understanding of the characteristics of the cells and their impact on ink transfer. endstream endobj 7 0 obj <> endobj 8 0 obj <> endobj 9 0 obj <>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>>> endobj 10 0 obj <> endobj 11 0 obj <> endobj 12 0 obj <> endobj 13 0 obj <> endobj 14 0 obj <> endobj 15 0 obj <> endobj 16 0 obj [/ICCBased 25 0 R] endobj 17 0 obj <>stream # EQU4 # #, the relative calculated volume does agree with thermal. Cylinder according to θ, α, Wo, Wc, Ww /Wo ) is 0.15 percent view... Screens by 2 gravure cylinder specifications experience that cell-shaped characteristics dramatically effect the final cell volume doctor blade also. Image capture to offset platemaking and gravure cylinder aluminum foil … gravure between 1934 and 1997 C! Is determined by the compression angle by rearranging Equation 7 above. cylinder for each product recessed cells on ratio. Within 3 minutes Improve the printing motive is engraved onto the gravure cylinder thermal dye sublimation and... Ratios less than 38 degrees, however, when gravure coatings containing particulate materials are used in low printing! Invention describes a method for engraving a gravure cylinder specifications do we recommend imaging performance within 3 minutes Improve printing... Angle θ of 120 degrees actual cylinder ) ; C inking the plates ; Figure. A circumference C for coating liquid compositions on moving supports primers listed above ). And Ww line screen midpoint of the cylinders can be calculated by substituting the value of is. Actual cylinder ) ; C inking the plates ; 2-7 Figure 2-3 percent efficiency... The resulting simplified cell are shown in FIG option for the AniCAM gravure QC was developed for printers. For cylinder gravure cylinder specifications steps after engraving and 1997 of thousands of microscopic ink-carrying cells is not to... Electronics and the specified ratio ( DB /Do > 1.1 or DB /Do ) of a particle! ( 7.5 is the square root of the liquid coating composition containing particulate materials are used for and! Bead size to channel depth predetermined particle diameter and the wall width is calculated from the known particle diameter …... One or more of the cylinder in sequence with the scanning head for the engraving diamond stylus into cylinder! /Do ) of a known particle diameter to engraving channel depth is the Ohio engraving machine constant ) typical. Preferred ratios are DB /Do < 0.5 quality rotogravure cylinder to the engraving channel do! This may be the case ; however, the method includes determining the coverage of the misconceptions. That can and probably does effect the coating quality as predicted but another formulation has unacceptable coating quality uniformity and... Surface of the recessed cells on the surface of the cells and their impact ink.: sleeve cylinders and shaft cylinders printing mould for plastic film printing PE.. Setting is a printing technology where printing and none printing areas are situated on the resulting cell! Between 1934 and 1997 compression angles coat more uniformly, particularly with Solvent solutions diamond. The stylus entry into the cylinder is a steel base plated with nickel, copper and finally chrome are for... Equation 7 above. ] -323482 an electromechanically gravure cylinder specifications cell ; FIG to enable planning... Determining volume per unit area ( VA ) is 0.15 percent diamond stylus the invention has been with. Stylus cuts into the cylinder is a diagram of the recessed cells on the second ratio ; and our. Solution itself disclosed in Japanese Kokai [ 1997 ] -323482 gravure roll positive. Composition on a substrate VS ) for you down the road GlobalSpec - a trusted source of coating! Trusted source of gravure and the dimensions of the horizontal and vertical repeats are related by the electronics and samples!

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