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

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

Ahem, the following protagonist will appear: The "icebreaker" warrior to be introduced today is Shaanxi Beiren Printing Machinery Co., Ltd. (hereinafter referred to as Shaanxi Beiren). As one of the leading companies in China's packaging and printing equipment manufacturing, Shaanxi Beiren early Started research in the related fields of flexographic printing and equipment manufacturing. The various 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 printing presses to keep up with the trend of international advanced technology. Among them, the technical level has reached the international leading level. The satellite-based flexographic printing presses made domestic users get rid of the dependence on imported equipment.

What does 　　 satellite flexographic printing machine look like?

Satellite flexographic printing machine includes five parts: unwinding unit, lead-in traction unit, printing part, lead-out traction unit and winding unit. .

Controlling 65 "axes" is really not that simple!

"I have no one without others, I have an advantage if others have" is the product development philosophy of Shaanxi Beiren. The research and development of satellite-type flexographic printing presses also adhere to this concept and compare with the most advanced international technology. Specifically, it is hoped that the equipment has a full Ethernet architecture, and has pre-register, high-speed avoidance, automatic correction of printing deviation, and High-end equipment functions such as deceleration automatic pressure adjustment, automatic calculation of working position for plate change, and ready-to-use old version. The realization of various functions poses a great challenge to the design of the control system of the equipment. Not only requires the control system to have a full Ethernet structure, but also requires high control accuracy of the system. While achieving multi-axis synchronization, it must also respond to manual color phase adjustment. In the satellite flexographic printing machine, each "axis" is a servo motor circuit, and in this project, the number of servo motor circuits for a single device is as high as 65. These "axes" must be associated with each other during the operation of the device. , And to be independent, the complexity can be imagined.

Look at what kind of control scheme is designed

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

Its "relevance" is manifested in 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 system's virtual electronic axis and the adjustment speed required to achieve overprinting. Each axis must respond to proper manual color phase adjustment while ensuring the synchronization of the system transmission. After all the commands of the system are processed by PLC in real-time in a unified manner, they are transmitted to each interrelated axis through Ethernet/IP industrial Ethernet, and the corresponding speed synchronization and phase adjustment are made.

Its "independence" is manifested in the fact that under the process control mode and control framework necessary for each axis, the operating mechanism is not completely the same, but is self-contained. In the PLC, the functional parameters of each axis are not completely the same. The functional parameters and system functions required by each axis of the PLC are downloaded to the servo drive unit of each axis through the Ethernet/IP industrial Ethernet. The drive unit drives the corresponding servo motor to control the corresponding axis according to the received function parameters and system functions.

In the specific construction of the system, the Compact Logix1756PLC is used as the master station PLC, and the CPU selects 1756-L72. The master station PLC is connected to the industrial switch ES-1026 through the Ethernet module 1756-EN3TR, and then the slave station PLC and human are connected through the industrial switch. The machine interface and the servo drive form an Ethernet/IP industrial Ethernet network to realize the centralized control of the entire 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, so as to ensure the ink delivery and imprinting force required for printing to achieve the perfect printing effect.

The performance has 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 presses, and realized all the high-end functions expected in the design. The registration accuracy and printing accuracy of the product fully meet the target requirements, and the maximum printing speed can reach 300m/min.

When it comes to speaking, it is better to do it: continuous operation for 24 hours a year without failure!

At the customer site, the satellite flexographic printing machine produced by Shaanxi Beiren has been put into operation for one year, and it has achieved continuous operation for 24 hours a year without failure at a printing speed of 250m/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, remote diagnosis and configuration changes of the equipment can be realized during the operation and maintenance process, so that Shaanxi Beiren can provide services to customers more conveniently and quickly, effectively improving the service efficiency and level of Shaanxi Beiren.

At present, the full range of satellite flexographic printing presses of Shaanxi Beiren have been applied in many packaging and printing companies. When receiving a return visit, users gave Beiren printing presses a score similar to that of imported equipment. The "high efficiency, energy saving, and environmental protection" characteristics of satellite flexographic printing presses will bring broader market prospects and unlimited market potential to Shaanxi Beiren.