Investigation of anilox roller cell clogging

Savickas, Arnas; Manufacturing, Vilnius Digital; Stonkus, Rimantas; Jurkonis, Eugenijus

doi:10.24867/jged-2020-2-061

Cited by 4 publications

(4 citation statements)

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“…Different types of ink (solvent-based, water-based, and UV inks), as well as different viscosities of inks, were used in printing houses involved in the study. This publication is the continuation of a previously initiated study focussed on anilox roller cell clogging [30].…”

Section: Introductionmentioning

confidence: 95%

“…Anilox rollers wear and plug during operation, and this leads to a reduced transfer of ink [29], resulting in lower optical density (loss in colour strength) of the prints. However, there are few studies that analyse the condition of anilox rollers; there is a lack of research that analyses what influences anilox roller cell clogging and cell wear, and how it does so [29,30].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the Condition of Anilox Rollers

et al. 2021

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To produce high-quality prints using flexographic printing technology, it is important, among other factors, how accurately and consistently the ink is delivered to the printing plate, and, from there, onto the printed material. This function is performed by anilox rollers. The aim of this research is to investigate the condition of anilox rollers in printing houses in the Baltic states. The study evaluated the wear and cell clogging of anilox rollers. The dependency of clogging on the cell size, as well as the dependency of wear on the cell size (i.e., change in cell volume) and quantity of doctor blades, was investigated. In addition, the uniformity of cell clogging and wear on the surface of the anilox roller was evaluated. Studies have shown that more than half of the anilox rollers in printing houses are not washed properly; higher line screen anilox rollers tend to become more clogged, and it is important to take measurements at more than three locations to assess the reliability of more worn rollers.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Assessment of the Condition of Anilox Rollers

et al. 2021

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“…Its combination with the printing and electronic industry gives full play to the unique advantages of flexo printing and promotes the good development of the printing and electronic industry [1,2]. However, with the increasing demand for printing quality and efficiency in the market, further understanding and optimization of the flexographic printing process has become increasingly important [3]. Scholars all over the world have paid much attention to flexographic printing and have deeply studied various aspects of flexographic printing technology [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on Ink Transfer Channel of Flexography Based on Fluid–Solid-Heat Interactions

Zhu,

Xing,

Zhu

2024

Processes

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Flexographic printing is widely used in the packaging field, but there are still some problems in the printing of flexographic ink on non-absorbent substrates, such as low precision and unstable quality. In this paper, the printing process of flexographic ink is simulated. The interaction of fluid flow, temperature change, and solid deformation in flexographic printing is studied systematically by using the method of fluid–solid thermal coupling for the first time. The process of ink channel formation under static extrusion and fluid–solid thermal coupling was analyzed. The influences of printing pressure, printing speed, ink layer thickness, and ink viscosity on the ink channel were explored. The results show that the printing speed increases and the temperature in the stamping area increases. The printing speed is nonlinear related to the ink flow channel, the influence on the channel is slow at a low speed, the channel increases sharply at a medium and high speed, and tends to be stable at a high speed. When the printing speed is 200 m/min, the ink temperature in the stamping area is 1.5 °C higher than that at the entrance. With an increase in printing pressure, the ink flow channel width showed a trend of decreasing first and then stabilizing, and the pressure was about 0.4 MPa, showing a small fluctuation; the greater the pressure, the higher the temperature of the ink, which will change the performance of the ink and plate, causing adverse effects on the printing belt. The channel width showed obvious nonlinear characteristics with an increase and decrease in ink thickness. When the ink thickness is 30 μm, the deformation of the plate reaches the maximum, and the width of the ink circulation channel is correspondingly the widest. The change in ink viscosity has little influence on the stability of the ink’s internal flow rate and temperature field. The research results provide theoretical support for the transfer of ink printing from gravure to flexo printing.

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“…Further complications arise due to the desiccation of ink remnants within the cells, which has implications for the ceramic surface of the roll. During printing, the ink tends to dry on the base and peripheries of the anilox cells, progressively diminishing the ink capacity [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Efficiency and Anilox-Roll Condition after Ultrasonic Cleaning

Przybysz,

Lipkiewicz,

Małachowska

et al. 2023

Coatings

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In the flexographic printing industry, anilox rolls play a pivotal role in determining ink usage. These rolls are characterized by anilox cells, which transfer ink to the final printed material. However, these rolls face wear and potential damage during their operational life, largely due to improper cleaning or debris accumulation in the ink duct. Such contamination compromises the ink capacity, impacting print quality. With the industry’s need for consistent and high-quality prints, there is a growing emphasis on the development and consistent implementation of optimal anilox-roll operation methodologies. One cleaning method gaining traction is ultrasonic cleaning. This method employs ultrasonic waves in conjunction with a cleaning agent, providing a quick, efficient, and environmentally conscious cleaning alternative. Yet, there is limited scientific data on the actual condition of anilox rolls after ultrasonic cleaning. In this study, the surface of anilox rolls post-ultrasonic-cleaning was comprehensively examined using microscopic analysis. This assessment provided insights into the method’s efficacy and potential for causing roll damage. The results showed that post-printing, rolls lost approximately 20% of their ink capacity, and ultrasonic cleaning effectively restored the ink capacity of the undamaged rolls. However, for rolls with pre-existing damage, the ultrasonic cleaning process exacerbated the damages, leading to complete delamination in some instances. This study underscores the potential of ultrasonic cleaning in restoring anilox-roll efficiency but also highlights the need for caution with damaged rolls.

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Investigation of anilox roller cell clogging

Cited by 4 publications

References 0 publications

Assessment of the Condition of Anilox Rollers

Assessment of the Condition of Anilox Rollers

Numerical Simulation on Ink Transfer Channel of Flexography Based on Fluid–Solid-Heat Interactions

Assessment of Efficiency and Anilox-Roll Condition after Ultrasonic Cleaning

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