Printing plate installation and proofreading of pr

Key points of printing plate installation and calibration of printing press

the installation of printing plate should be lined with appropriate backing paper according to the specification of plate barrel before printing a print loyal to the original. However, how to correctly and quickly calibrate the gauge line of printing plate is a necessary technology for an entry-level technician. Now, thanks to the blessing of printing technology, after the successful development of cross gauge line punching device, Equipped with high-speed angular displacement monitoring system, force detection sensor and amplifier, a set of printing plate used to take more than ten or twenty minutes to complete under the adjustment of skilled printing technicians, but now it has been greatly shortened. The principle of its invention is to integrate the plate calibration technology previously regarded as the introduction of master, that is, to calibrate the four-color cross gauge line of the printing plate and put a narrow space on the plate clamp of the printing machine, Move it outward to a platform punch. After punching, the printing plate can be completed by installing the plate clamp of the printing machine, using the remote control positioning device of the printing machine and making some minor adjustments. The [software operation] is very simple. However, after the successful research and development of labor-saving equipment, some traditional skills are gradually ignored by the new generation of printing technicians. The revision technology is revisited here, although it is a little contrary to printing technology, However, the principle of cylinder design and the technology of proofreading are thought-provoking. Think about the past, in addition to the sharp ability of color discrimination, printing masters also need to have smart hands and feet. However, smart hands and feet can be known from the speed of proofreading, so this technology has naturally become a skill for master to eat and an important subject for general apprentices to study before they get started. Let's explore the principle of this school edition technology

first of all, we should attract product developers to join in. We should understand the number of threads of the screen screw in the plate clamp, that is, the pitch. Generally, if No. 17 or 19 wrench is used as the plate calibration tool, the screw pitch is mostly 0.75m/m, 1.0m/m, 1.25m/m or 1.5m/m. However, depending on the plate barrel design of the printing machine manufacturing company, the printing master does not rotate the plate calibration screw indiscriminately when correcting the plate, Master's adjustment is only based on his feeling, but how to handle it accurately. The key is that after you read this report, you will be an introductory master (you didn't want to learn before, and master took a rag to cover up when he was afraid of being learned). For the screw tooth of No. 17 wrench with a speed of 0.75m/m, the screw thread will produce a displacement of 0.75m/m when it rotates one rev, and one take is 0.125m/m; Two Rev = 12 angles, the printing plate will be displaced by 1.5m/m. Understand this design principle and pay attention to the principle of printing plate parallelism (pull the bite three take, remember the opposite top-to-side drag three take, the same is true, otherwise it is opposite). As long as you can know the basis of four operations, the correction of each set of printing plate gauge position will be calculated by the brain quickly and accurately, and the plate correction technology is no longer a unique skill after rags are broken

reprinted from: keyin