During the installation,commissioning and production operation of gravure printing press,there will be problems such as the parallel level of mechanical installation and commissioning,the quality of printing materials,the quality and installation level of printing plate roller,the performance of ink,the pressure of impression roller,the quality of doctor blade and the angle of doctor ink,and the control of tension.
During the installation,commissioning and production operation of gravure printing press,there will be problems such as the parallel level of mechanical installation and commissioning,the quality of printing materials,the quality and installation level of printing plate roller,the performance of ink,the pressure of impression roller,the quality of doctor blade and the angle of doctor ink,and the control of tension.
For example,the horizontal overprinting is unstable and the color by color deviation is increased:in the process of intaglio printing,I often encounter the problem of patten horizontal deviation or color by color deviation,which makes the printed product pattern ambiguous and the edge has monochrome exposure,making the printing accuracy poor and the product quality low,so that the quality cannot be improved.
Such problems are often caused by the parallel and horizontal problems in the mechanical installation that we do not pay attention to.The solution is:first of all,we can use visual inspection to detect whether the printing materials are loose and tight at the same time.If so,we must carefully check the parallelism and level of the guide roller.We must check the feeding mode from unwinding to winding.Neither the nuit nor the nuit nor the guide roller can be careless.Generally speaking,if the printing speed is above 120m/min,the horizontal accuracy should be within + 2 wires.In addition,it must be noted that the level and level of our impression rubber roller should also be calibrated,which is very important.The reason why the horizontal overprinting is inaccurate and the printing material swings left and right is that the printing pressure is uneven.It is necessary to repeatedly check the synchronization of the pressure roller and the uniformity of the pressure to make our overprinting complete.
