5results about How to "Improve overprint accuracy" patented technology

The invention discloses a reel-to-reel multilayer printing control method based on improved simulated annealing optimization LQR, and belongs to the field of multilayer printing flexible electronics. According to the reel-to-reel multilayer printing flexible electronic control method based on the improved simulated annealing optimization LQR, initial LQR controller design is carried out on an overprinting system according to a reel-to-reel overprinting system dynamic model, and a simulated annealing algorithm is selected to carry out LQR controller optimization; and self-adaptive annealing, dynamic step length, mixed neighborhood search and other methods are used to make up for the defects of slow convergence speed, difficult temperature control and the like of the traditional simulated annealing algorithm, so as to obtain the optimal control quantity and improve the overprinting precision and control stability of the system. The control quantity optimization of the overprinting system is realized, the control stability of the overprinting system is ensured, and the overprinting precision is improved.

The invention discloses a compensation primary color overprinting method based on printing material deformation. The compensation overprinting method for a roll-shaped base material printing machine with a plurality of color groups comprises the following steps that overprinting color codes and color code detection probes of color separation printing plates are arranged; detecting and calculating the positions and mutual distances of the overprinted color codes on the two sides of the printing material; calculating longitudinal and transverse overprinting deviations between the color cells; calculating the longitudinal and transverse deformation of the printing material between the color cells; and calculating the longitudinal and transverse overprinting adjusting quantities of the color cell. Through the steps, the problem of multicolor overprinting after the printing material is deformed is solved.

The invention relates to a thermal transfer printing mechanism with a circumferential structure and a thermal transfer printer with the thermal transfer printing mechanism. The thermal transfer printing mechanism comprises a printing roller, a printing head assembly and an integrated thermal transfer ribbon box, the printing roller is transversely and rotatably installed at the upper end of the printer rack, guide rollers are symmetrically arranged on the two sides of the vertex of the lower arc of the printing roller correspondingly, and the printing head assembly is installed between the two installation side plates; the multiple printing head assemblies are distributed on the portions, except the bottom, of the periphery of the printing roller in the circumferential direction at equal intervals, the periphery of the printing roller is wrapped with a paper feeding film, the two ends of the paper feeding film are wound around the sides, close to each other, of the two guide rollers respectively, and the two lower sides of the paper feeding film are away from each other. The multiple integrated thermal transfer ribbon boxes are arranged at the multiple printing head assemblies in a one-to-one correspondence mode, and the integrated thermal transfer ribbon boxes are installed on the installation side plate on one side. The device has the advantages that single-time or multi-time transfer printing of a printing medium is achieved, and the overprinting precision is improved; and the large-angle arc-shaped paper feeding film path can enable the photographic paper to be more closely covered on the printing roller, so that the space utilization rate is improved.

This application relates to the field of automated control technology for printing machinery, and particularly to an automatic registration compensation method, system, and device for a flexographic printing press. The method includes: a deviation acquisition step: during the printing process, the real-time positional deviation value of the color mark printed by the subsequent printing unit relative to a reference mark is acquired in real time through the vision detection system, the reference mark being the mark printed on the substrate by the first printing unit; an adjustment step: the real-time positional deviation value is processed by the motion controller, including validity verification, filtering, and nonlinear gain adjustment, to generate a corresponding plate roller phase adjustment command; and a correction step: the plate roller phase adjustment command is applied to the plate roller of the corresponding printing unit through a superimposed positioning method to correct the phase of the plate roller relative to the spindle, thereby achieving registration correction. This application can effectively correct the phase of the plate roller relative to the spindle, achieving registration correction and improving printing quality.

The invention discloses a plate roller online overprinting adjusting device which comprises a plate roller, an axial adjusting assembly and a circumferential adjusting assembly, and the axial adjusting assembly and the circumferential adjusting assembly are arranged at the end of the plate roller. The axial adjusting assembly comprises an axial fixing sleeve coaxially and fixedly arranged at the end of the printing roller in a sleeving mode, an axial adjusting disc coaxially and rotationally arranged on the periphery of the axial fixing sleeve in a sleeving mode, and an axial driving unit acting on the axial adjusting disc. The axial fixing sleeve and the plate shaft are driven by the axial driving unit to correspondingly do synchronous axial movement along with the axial adjusting disc; the circumference adjusting assembly comprises a circumference fixing sleeve coaxially arranged at the end of the plate shaft in a sleeving mode, a transmission bevel gear fixedly arranged on the circumference fixing sleeve in a sleeving mode, a circumference adjusting disc coaxially and rotationally arranged on the periphery of the axial fixing sleeve in a sleeving mode and a circumference driving unit acting on the circumference adjusting disc. And the axial fixing sleeve and the transmission bevel gear correspondingly and synchronously move axially along with the circumference adjusting disc under the driving of the circumference driving unit.