From traditional printing machinery to modern printing machines with high degree of automation, fast printing speed and stable performance, printing presses play an extremely important role as an important part of mechanical connection-terminal blocks. It plays a vital role in the circuit design and application of printing machinery. For example, PCB terminal blocks of Shanghai Lianjie Electric are often used in the printing machinery industry. Terminals are a kind of accessory products used to realize electrical connections, which are classified as connectors in the industry. With the increasing degree of industrial automation and stricter and more precise requirements for industrial control, the amount of wiring terminals has gradually increased. With the development of the electronics industry, the scope of use of terminal blocks is increasing, and there are more and more types.

　　A printing press is a machine that prints text and images. Modern printing presses generally consist of plate loading, inking, embossing, paper feeding (including folding) and other mechanisms.

　　The printing machinery of the world has made great progress since the 1980s. For more than 20 years, the development of printing machinery has gone through three stages.

　　The first stage was from the early 1980s to the early 1990s. This stage was the heyday of the development of offset printing technology. The maximum printing speed of sheetfed offset press during this period was 10,000 prints/hour. The pre-adjustment preparation time for a four-color printing machine before printing is generally about 2 hours. The automatic control of the printing press mainly focuses on the aspects of automatic paper-bearing, automatic paper delivery, automatic cleaning, automatic detection of ink color, automatic adjustment of ink volume, and remote control of register. In addition to single-color and two-color presses during this period, almost every single-fed offset press manufacturer also had the manufacturing capacity of four-color presses. Most manufacturers were able to manufacture paper turning mechanisms for double-sided printing.

　　The second stage is from the early 1990s to the end of the 20th century. In the 1990s, with the sheet-fed offset printing press as the symbol, the international printing machinery design and manufacturing level has taken a big step forward. Compared with the models in the first stage, the speed of the new generation models has been further improved, from 10,000 prints/hour to 15,000 prints/hour, and the pre-press adjustment time has also been greatly shortened from about 2 hours in the first stage to 15 minutes about. The automation level and production efficiency of the machine have also been greatly improved.

　　Since entering the 21st century, printing machinery has ushered in the third stage of development. At present, some models of sheet-fed offset printing presses can reach 17,000-18,000 prints per hour, but manufacturers do not strive to increase the maximum printing speed of the press, but use information technology to further shorten the pre-press preparation time And the time to replace the parts in pursuit of higher production efficiency.