Matching excellent paper machine shortens time and improves efficiency

What is the difference between domestic and internationally famous brand printers? China's printing equipment speed is generally lower than the world advanced level, the world's most advanced level of printing machine speeds generally reach 16,000 ~ 18,000 / hour, the highest has even reached 20,000 / Hours, while the highest speed for sheetfed offset presses in China is 15,000 sheets/hour, and the actual speed of use is even lower. As the first process of the sheet-fed lithographic offset press, the paper-feeding machine plays an important role, which is a powerful guarantee for the speed-up of the printing press.

The vacuum feeding device can effectively ensure the smooth conveyance of the paper. Although the domestic machine is involved but the effect is not ideal, it also needs the assistance of a brush wheel rubber wheel and the like. Internationally renowned brand presses do not require any power and rely entirely on vacuum for transport.

The hem-type delivery mechanism is adopted, which increases the transfer roller, which can prolong the handover time and improve the stability of the transfer, thus ensuring the high precision of positioning and transmission and increasing the speed of the machine. In order to prevent the cavities from coming into contact with the rollers, the transfer rollers are made of eccentric rollers. The paper-feeding mechanism has no eccentric motion, and its structure is relatively simple. It is relatively easy to design, manufacture, and adjust. It is suitable for high-speed, large-format printing and can be widely used in modern printing presses.

The three giants of the printing press KBA used two accelerating mechanisms for the delivery of paper. The paper feed first added the paper speed to the transfer roller at about 60% of the maximum speed, and then transferred it to the highest speed through the secondary transfer roller. Impression roller. The machine's maximum speed can reach 20,000 rpm, making it the world's fastest press.

In addition, domestic printers have low automatic control systems, which lead to long pre-adjustment time, waste of paper and ink, unstable quality of printed products, and high labor intensity of workers. This is also the main reason for the low efficiency of domestic printers. When the length and width of the paper to be printed are input into the computer, the feeder front and rear, the left and right positions of the pull gauge, the size of the print pressure, the left and right sides of the paper, and the front and back gauges are all adjusted synchronously. This significantly shortens the standby preparation time and improves production. benefit.