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.

　　塑料凹印油墨如果細度不夠，顏料顆粒過大或混雜有顆粒雜質，會導致刀絲的出現。因此，應選擇質量較好的油墨，顏料顆粒應小于10 m，應加入到油墨系統的過濾裝置中，并經常檢查它，以免雜質在油墨粗顆粒中損壞印版和刮刀。

　　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組成部分，應采用材質緊密、軟硬適中的自磨刮刀。一般來說，硬刮墨刀比軟刮墨刀產生的鋼絲更多，當刮墨刀的刀片損壞槽口時，會在承印物上產生有規律的左右運動的油墨。細刮刀間隙可用細砂紙打磨光滑，若有較大間隙需更換。因此,在刮墨刀的安裝需要平整、前刀也仔細檢查是否有缺口刮墨刀,刀仔細研磨后,如果有一個現象在印刷過程中,必須停止研磨,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.

　　鍍鉻板的表面光潔度和硬度對鋼絲的生產有重要的影響。塑料凹印油墨顏料一般是分散在顆粒狀態的連接材料中，在印刷過程中，油墨中布滿了網孔，多余的油墨被刮刀刮掉，同時連續摩擦印版表面。如果鍍鉻層的板面硬度不夠，很容易被粗墨劃傷而產生鋼絲。另外，要嚴格控制滾筒的加工精度和安裝精度，防止偏心超過標準，以免對刮刀和高速印刷線材的生產造成影響。

　　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，印刷車間的溫度、濕度和空氣清潔度也會影響刀絲的外觀。如果溫度太高，溶劑揮發太快，油墨干燥太快，如果濕度太大，油墨溶解、粘度大，刮墨困難，這兩種情況都容易造成刀絲的出現。因此，在印刷過程中，溫度控制在18 ~ 23℃，濕度控制在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%.

　　以上是濟南印刷廠為大家介紹的相關內容，想要了解更多內容，歡迎訪問網站：http://www.seven2000.comThe above is the relevant content introduced by Jinan printing factory. To learn more, please visit the website: http://www.jingyinshua.com