In the process of plastic intaglio printing, the phenomenon of knife and wire often appears. The reason is very complex, involving plate making, ink, scraping knife and environment. So, how to solve this problem? Today, we come to Jinan printing factory to see this.

　　1、墨水。

　　1. Ink.

　　塑料凹印油墨如果细度不够，颜料颗粒过大或混杂有颗粒杂质，会导致刀丝的出现。因此，应选择质量较好的油墨，颜料颗粒应小于10 m，应加入到油墨系统的过滤装置中，并经常检查它，以免杂质在油墨粗颗粒中损坏印版和刮刀。

　　If the fineness of plastic gravure printing ink is not enough, the pigment particles are too large or mixed with particle impurities, which will lead to the appearance of cutter wire. Therefore, the ink with good quality should be selected, and the pigment particles should be less than 10 m, which should be added to the filter device of the ink system, and it should be checked frequently to avoid impurities damaging the printing plate and scraper in the ink coarse particles.

　　2,刮墨刀。

　　2. Doctor blade.

　　刮刀是塑料凹版印刷的重要组成部分，应采用材质紧密、软硬适中的自磨刮刀。一般来说，硬刮墨刀比软刮墨刀产生的钢丝更多，当刮墨刀的刀片损坏槽口时，会在承印物上产生有规律的左右运动的油墨。细刮刀间隙可用细砂纸打磨光滑，若有较大间隙需更换。因此,在刮墨刀的安装需要平整、前刀也仔细检查是否有缺口刮墨刀,刀仔细研磨后,如果有一个现象在印刷过程中,必须停止研磨,不磨油油墨。

　　Scraper is an important part of plastic intaglio printing, which should be made of compact material and moderate hardness. Generally speaking, the hard blade produces more steel wire than the soft blade. When the blade of the blade damages the notch, the regular left and right moving ink will be produced on the substrate. The clearance of the fine scraper can be polished with fine sandpaper until it is smooth. If there is a large clearance, it needs to be replaced. Therefore, the installation of the doctor blade needs to be flat, and the front blade needs to be carefully checked to see if there is a gap. After the doctor blade is carefully ground, if there is a phenomenon in the printing process, the grinding must be stopped without oil.

　　3、印刷板。

　　3. Printed board.

　　镀铬板的表面光洁度和硬度对钢丝的生产有重要的影响。塑料凹印油墨颜料一般是分散在颗粒状态的连接材料中，在印刷过程中，油墨中布满了网孔，多余的油墨被刮刀刮掉，同时连续摩擦印版表面。如果镀铬层的板面硬度不够，很容易被粗墨划伤而产生钢丝。另外，要严格控制滚筒的加工精度和安装精度，防止偏心超过标准，以免对刮刀和高速印刷线材的生产造成影响。

　　The surface finish and hardness of chromium plate have an important influence on the production of steel wire. Plastic gravure ink pigment is generally dispersed in the particle state of the connecting materials. In the printing process, the ink is full of mesh, the excess ink is scraped off by the scraper, and at the same time, it continuously rubs the plate surface. If the surface hardness of chromium plating layer is not enough, it is easy to be scratched by rough ink and produce steel wire. In addition, the processing accuracy and installation accuracy of the drum shall be strictly controlled to prevent eccentricity exceeding the standard, so as not to affect the production of scraper and high-speed printing wire rod.

　　另外，印刷车间的温度、湿度和空气清洁度也会影响刀丝的外观。如果温度太高，溶剂挥发太快，油墨干燥太快，如果湿度太大，油墨溶解、粘度大，刮墨困难，这两种情况都容易造成刀丝的出现。因此，在印刷过程中，温度控制在18 ~ 23℃，湿度控制在50 ~ 60%。

　　In addition, the temperature, humidity and air cleanliness of the printing workshop will also affect the appearance of the cutting wire. If the temperature is too high, the solvent volatilizes too fast, the ink dries too fast, if the humidity is too high, the ink dissolves, the viscosity is large, and the ink scraping is difficult, both of these two situations are easy to cause the appearance of the cutter wire. Therefore, in the printing process, the temperature is controlled at 18 ~ 23 ℃, and the humidity is controlled at 50 ~ 60%.

　　以上是济南印刷厂为大家介绍的相关内容，想要了解更多内容，欢迎访问网站：http://www.jindingyinshua.comThe above is the relevant content introduced by Jinan printing factory. To learn more, please visit the website: http://www.jingyinshua.com