Satellite flexographic printing machine is predicted to be the new mainstream of flexographic printing in the 21st century due to its stable printing process, accurate overprinting, high efficiency and environmental protection. In the European and American markets, satellite flexographic printing machines are the most popular models in flexographic printing. However, in China, due to the high technical threshold, the market has been monopolized by high-priced imported equipment for a long time. For Chinese printing and packaging equipment users, satellite flexographic printing machines are a complete "luxury". Only by realizing the localization of products and reducing prices can we break through the embarrassing situation of satellite flexographic printing machines in China.

Who will "break the ice" in the high-end printing market "?

Ahem, the following protagonist appears: the "ice-breaking" warrior to be introduced today is Shaanxi beiren printing machinery co., ltd. (hereinafter referred to as Shaanxi beiren). as one of the leading enterprises in the manufacture of packaging and printing equipment in China, Shaanxi beiren started the research on flexographic printing and equipment manufacturing related fields early. The many new products developed by the company not only fill the gaps in my country's environmental protection printing technology and manufacturing fields, but also promote the improvement of the overall level of the industry, allowing domestic printers to keep up with the trend of international advanced technology. Among them, the technical level has reached the international leading The satellite flexographic printing machine allows domestic users to get rid of dependence on imported equipment.

What does the satellite flexographic printing machine look like?

The whole machine of satellite flexographic printing machine includes five parts: unwinding unit, incoming traction unit, printing department, outgoing traction unit and winding unit..

Controlling 65 "axes" is really not that simple!

"No one has me, no one has me, no one has me" is the product development concept of Shaanxi Beiren. The research and development of satellite flexographic printing machine also adheres to this concept. Compared with the most advanced technology level in the world, specifically, it is hoped that the equipment will have a full Ethernet architecture and have high-end equipment functions such as pre-registration, high-speed avoidance, automatic correction of printing deviation, automatic pressure adjustment of acceleration and deceleration, automatic calculation of working position for plate change, and ready-to-use on the old version. The realization of various functions poses a great challenge to the design of the control system of the equipment. It not only requires the control system to have a full Ethernet structure, but also requires the system to have high control accuracy. While realizing multi-axis synchronization, it also needs to respond to manual phase adjustment. In the satellite flexographic printing press, each "axis" is a servo motor loop, and in this project, the number of servo motor loops for a single device is as high as 65. These "axes" must be associated in the operation of the device., And independent, its complexity can be imagined.

See what kind of control scheme is designed.

The development of full servo control system for satellite flexographic printing press is mainly based on servo control and real-time high-speed network technology. The full servo control system includes the tension control of the feeding unit, the receiving unit, the lead-in unit and the lead-out unit, and the servo control of each "axis" of the printing color group. These "axes" are both "related" and "independent" of each other ".

Its "relevance" is reflected in the fact that, as the axis that controls each color printing plate roller, the source of its speed is unified, that is, the real-time speed given by the virtual electronic axis of the system and the adjustment speed required to achieve overprinting. Each axis must respond to proper manual phasing while ensuring the synchronicity of the system transmission. All instructions of the system are processed by PLC in real time, and then transmitted to each interrelated axis through Ethernet/IP industrial Ethernet, and corresponding speed synchronization and phase adjustment are made.

Its "independence" is reflected in the fact that each axis is not completely identical in its own process control mode and control framework, and is self-contained. In PLC, the functional parameters of each axis are not exactly the same. The functional parameters and system functions required by each axis of PLC are downloaded to the servo drive unit of each axis through Ethernet/IP industrial Ethernet, and the servo drive unit drives the corresponding servo motor to control the corresponding axis according to the received functional parameters and system functions.

In the specific construction of the system, the Compact Logix1756PLC is used as the master station PLC, and the CPU is 1756-L72. The master station PLC is ES-1026 connected with the industrial switch through the Ethernet module 1756-EN3TR, and then the Ethernet/IP industrial Ethernet network is formed through the industrial switch and the slave station PLC, man-machine interface and servo driver to realize the centralized control of the whole control system by the master station PLC.

The feed motor of each printing color group can accurately feed to the position required by the process through the feedback of the encoder, ensuring the ink delivery amount and stamping force required for printing to achieve perfect printing effect.

Performance reached the international leading level!

With the help of Rockwell Automation's full servo system, Shaanxi Beiren successfully launched a full range of satellite flexographic printing machines and realized all the high-end functions hoped for in the design. The registration accuracy and printing accuracy of the product fully meet the target requirements, and the maximum printing speed reaches 300 m/min.

Speaking is not as good as doing it: 24 hours a year of trouble-free operation!

At the customer's site, the satellite flexographic printing machine produced by Shaanxi Beiren has been put into operation for one year and has achieved 24 hours of trouble-free operation for one year at a printing speed of 250 m/min. The stable operation of the equipment also greatly reduces the on-site service work of Shaanxi Beiren and saves a lot of manpower and material resources. Through the remote access function of the equipment, the remote diagnosis and configuration change of the equipment can be realized in the process of operation and maintenance, so that Shaanxi Beiren can provide services for customers more conveniently and quickly, and effectively improve the service efficiency and level of Shaanxi Beiren.

At present, the full range of satellite flexographic printing machines of Shaanxi Beiren have been applied in many packaging and printing enterprises. When users received a return visit, they scored similar scores for Beiren printing machines with imported equipment. The characteristics of "high efficiency, energy saving and environmental protection" of satellite flexographic printing machine will bring broader market prospects and unlimited market potential for Shaanxi Beiren.