| 关于柔版水墨印刷机，你不得不知的网纹辊知识 |
| 添加时间：2017/11/30 17:11:26 浏览次数： |
| 在柔版印刷中，印刷品质量在很大程度上取决于网纹辊的质量和运行结果。网纹辊是负责向印版上均匀地传递一定量的油墨，既是油墨的传递辊，又是油墨的计量辊，使墨量的使用实现了精确化。因此，网纹辊被柔版印刷的业界人士称为是柔印机的“心脏”。 In flexographic printing, the quality of printed products depends to a great extent on the quality of the reticulated roll and the results of its operation. The anilox roller is responsible for uniformly conveying a certain amount of ink to the printing plate, which is both the transfer roller of the ink and the metering roller of the ink, which makes the use of ink quantity accurate. Therefore, the reticulate roll is called the "heart" of the flexo printer by the industry personages of the flexographic printing. （1）、怎样给柔版印刷机配网纹辊 (1) how to distribute the mesh roller for the flexo printing press 在选择使用网纹传墨辊时，需要考虑印品的精细层度、承印材料种类、油墨类型及经济因素等。选择的项目包括网纹辊网穴的结构、网纹辊线数及表面涂层材料等。 In the choice of using the anilox roller, the need to consider the printing layer, fine type, printing material and ink types and economic factors. The selected items include the structure of the mesh roll mesh, the number of reticulated roll lines and the surface coating materials. a水墨印刷机网纹辊的选配一般根据印品的精细程度来选择网纹辊线数。对于实地印刷，如果网纹辊的网纹线数过低，供墨量太大，印版实地边缘积墨而造成印品边缘重影；如果网线数过高，供墨量不足，实地密度不够而发花。如果两实地叠印或印刷版面实地较小时可选择较高一些的网线数。 The selection of reticle rolls for a ink printing press generally selects the number of reticulated roll lines according to the fine degree of the print. In the field of roller Anilox printing, if the line number is too low, the amount of ink is too large, the plate edge field caused by ink printing edge ghosting; if the wire number is too high, the amount of ink is insufficient, lack of floating solid density. If two or more field overprint printing layout field hours can choose some higher resolutions. b文字、线条版可根据文字的大小、线条的精细选择合适的网纹辊。对于彩色网线印品的印刷，根据印品本身的线数来确定网纹辊的网线数。实践证明，要获得品质优越的印刷，网纹辊的网纹线数与印版的网点线数保持4：1左右的比例关系较好 B text, line plate can be selected according to the size of the text, lines of fine selection of the appropriate reticulate roll. The number of net lines of the reticulated rollers is determined according to the number of lines of the print. It has been proved that the number of net lines of reticle rolls has a good relationship with the number of dot lines of the plate to keep the proportion of 4:1 in order to obtain the printing with superior quality. c进行水墨印刷时，通常采用600角网穴的网纹辊，这种排列易于油墨的释放。上光时使用的陶瓷网纹辊宜采用300角，较适用于传输粘度较高的光油。 对于双辊式刮墨系统，采用300角的网纹辊在印刷实地、线条及文字时效果较好。 When C is used for ink printing, the 600 angle net holes are usually used. This arrangement is easy to release from ink. The ceramic reticulated roll used in the light of light is suitable to use 300 angles, which is more suitable for transmitting light oil with higher viscosity. For the double roll ink scraping system, the 300 corner reticle rolls are better in printing field, lines and words. (2)、网纹辊的维护与保养 (2) maintenance and maintenance of reticulated roll 网纹传墨辊是柔版印刷机上最精密的机械零件，由于其特殊的表面结构很容易遭到损坏，必须对其进行认真的防护和保养。网纹传墨辊具有一定的强度，但如果局部承受过大外力，则其表面的着墨孔结构极易被损坏。网纹传墨辊应贮放在特制的包装箱里，使其处于垂直位置，以免被异物硌伤或因重力作用发生弯曲。在搬运及机上操作时，一定要防止异物与网纹辊碰撞。 Anilox roller is flexo printing machine precision machinery parts, because of its special surface structures are susceptible to damage, protection and maintenance must be carried out to its serious. Anilox roller has a certain strength, but if the local bear excessive force, then the reference hole structure of the surface is easy to be damaged. Anilox roller should be stored in a special box, which is in the vertical position, so as not to be hurt or break foreign body by gravity bending. When handling and operating on the machine, it is necessary to prevent the collision between the foreign body and the reticulated roll. （3）、网纹辊的清洗 (3) cleaning of the reticulated roll 在网纹辊出现的质量问题中，除少数是因长时间使用造成磨损外，绝大多数是由于对网纹辊的清洗不当或清洗不彻底造成的。如何保持网纹辊的良好清洁状态,对保证印刷质量至关重要。 In the quality problems of anilox rolls, most of them are caused by improper cleaning or not thorough cleaning due to long time wear. How to keep the good cleaning status of the reticulated roll is very important to ensure the quality of printing. 网纹辊的清洗可分为日常清洗和周期清洗，最重要的是日常清洗，每印刷完一个印件就应尽快清洗网纹辊，除掉网纹辊上残余的油墨。任何一种能令人满意的网纹辊清洗系统，都必须做到在彻底清除每个网穴底部的残墨颗粒等残留物，同时保证不损坏网穴的网墙。 The cleaning of netting roller can be divided into daily cleaning and periodic cleaning. The most important thing is daily cleaning. Once printing is finished, the roller should be cleaned as soon as possible, and the remaining ink on the roller can be removed. Any of a roller cleaning system is satisfactory, we must all be in complete removal of each network points at the bottom of the ink particles and other residues, and ensure that no damage to the network point network wall. 目前，网纹辊的清洗工艺主要有物理清洗法和化学清洗法。下面介绍当前常用的几种清洗方法和操作要领。 At present, the cleaning process of the reticulated roll mainly includes the physical cleaning method and the chemical cleaning method. The following are several commonly used methods of cleaning and operation. A、超声波清洗法 A, ultrasonic cleaning method 超声波清洗是一种高效的清洗方法，但要注意的是超声波装置应调到适合清洗的频率上。大多数使用超声波清洗的印刷厂还要配合使用强腐蚀性溶液，以提高效率，减少清洗时间。由于柔性版印刷多采用水基油墨，以超声波清洗法在清洗之前有一个浸泡过程，用来软化陶瓷网纹辊网穴中的残墨等硬杂质。这个程序根据辊的大小及油墨堵塞情况而定，一般要0.5～24小时。超声波清洗法利用超声波来产生超声波空化现象——以机械形式形成精微的气泡，这些气泡在压力作用下，当接触网纹辊表面时会内向爆炸，内向爆炸释放的能量会形成一种搅动作用或者是摔除作用，将残墨等杂质从网纹辊的网穴中清除掉。 Ultrasonic cleaning is an efficient cleaning method, but it is important to note that the ultrasonic device should be tuned to the frequency suitable for cleaning. Most of the printing plants that use ultrasonic cleaning also cooperate with the strong corrosive solution to improve efficiency and reduce the time of cleaning. Due to the use of water-based ink flexo printing, ultrasonic cleaning method has a soaking process prior to cleaning, to soften the ceramic roller network points in residue hard impurities. The program depends on the size of the roll and the ink jam, usually 0.5 to 24 hours. Ultrasonic cleaning method using ultrasonic wave to generate ultrasonic cavitation phenomenon in mechanical form of microscopic bubbles, the bubbles under pressure, when the contact roller surface will implode inward, the explosive energy released will form an agitation or fall in the role, will ink other impurities from the roller network points in remove. 超声波空化强度受下列因素影响： The ultrasonic cavitation intensity is influenced by the following factors: n 超声波强度。最好参考清洗设备生产厂商推荐的超声波强度标准。 N ultrasonic intensity. It is best to refer to the ultrasonic intensity standard recommended by the manufacturer of the cleaning equipment. n 超声波频率。超声波频率与空化现象的强度成反比。频率增大，气泡变小，空化强度亦变小。一般情况下，选用最小频率4万赫兹所生成的气泡就可以了。 N ultrasonic frequency. The frequency of ultrasonic wave is inversely proportional to the intensity of cavitation. As the frequency increases, the bubbles become smaller and the cavitation intensity decreases. Generally, it is possible to choose a bubble generated by a minimum frequency of 40 thousand Hertz. n 浸泡温度。浸泡溶液的温度一般保持在60℃～70℃较好。 N soak the temperature. The temperature of the soaking solution is generally maintained at 60 ~ 70 C. n 清洗时间。清洗时间是最重要的因素，网纹辊置于超声波溶液中的时间越长，其网穴越容易受损害。许多超声波清洗法采用预浸泡程序，而后用超声波清洗5分钟，或时间再稍短些，以保护网纹辊上的网穴不受损害。 N cleaning time. The cleaning time is the most important factor. The longer the reticulated roll is placed in the ultrasonic solution, the more easily the net hole is damaged. Many ultrasonic cleaning methods use the pre soaking procedure, then use ultrasonic to clean for 5 minutes, or for a short time, so as to protect the mesh points on the roller. B激光清洗法 B laser cleaning method 这是近年研制出的一种新型清洗方法,使用带特殊光学器件的激光装置来清洗网纹辊。在清洗系统中，激光被置于光学器件中，以保护陶瓷网纹辊表面，但是可以蒸发掉网纹辊上的残墨等杂质。据称，这种清洗法可以清洗最高网线数为1200线/英寸的激光雕刻陶瓷网纹辊，从网穴中清洗掉干墨、融合剂、蜡、硅、聚四氯乙烯、版材颗粒甚至刮刀颗粒等，而不损坏网纹辊上网穴。 This is a new cleaning method developed in recent years, using a laser device with a special optical device to clean the reticulated roll. In the cleaning system, the laser is placed in an optical device, in order to protect the ceramic roller surface, but impurities evaporate roller ink etc.. It is said that this cleaning method can clean the laser engraving ceramic anilox roller with the highest number of net lines of 1200 lines / inch, remove dry ink, fusion agent, wax, silicon, polyvinyl chloride, plate material and even scraper particles from the net hole, without damaging the net roller web point. |
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