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Sheetfed offset - a simple process
(Sheetfed Offset-Piece of Cake) The advancement of the printing press has brought the speed of sheetfed offset to a new level, and the operation has also become simpler. However, the printing of packaging cartons has been unsatisfactory. What are the challenges faced by sheet-fed offset printers? What kind of solution does the manufacturer of the press have to offer to adapt to those paperboards that are difficult to handle? Challenge 1: Diversifying Substrates 4 years ago, the Hammer Lithograph printing company in Rochester was only able to print on paper. The customer and market requirements motivated the company to move in a newer and broader direction, so they decided to enter the BOPP material field. Now Hammer prints its single BOPP material on their Mitsubishi presses, including a 56†machine and a UV ink printer. They use a dedicated parameter program to control the operation of the press and use the single BOPP material. In high-end printing operations Mitsubishi's presses for printing paper plates use a heavy-duty paper guide system to prevent scratches and smudges on the surface of the paper plate. COMRAC (Central Operations Job Preparation and Console) only One-third of the normal print preparation time is required to adjust the thickness and size of the substrate.To determine if the substrate is working properly and to define the mechanical properties of the press from a statistical point of view, Mitsubishi recently introduced the third generation. DRA (Digital Register Analysis) service. DRA2000 provides some metrics to printer buyers and existing users, usually in the micron range, enabling the precise positioning of sheets on the press between each unit. , and then make the necessary adjustments to determine the standard deviation and the reduction of the deviation.Challenge 2: The balance of the ink and ink in the ink balance printing process determines the entire The quality of the product.The fine wetting balance system was successful on the Man Roland 900. The complex ink supply unit was responsive, enabling a stable ink supply, and it was used with Roland's Deltamatic dampening system to eliminate printing on the plate. The Mitsubishi company is also concerned about ink and ink, and the Delta dampening system they developed maintains a consistent supply of wetting fluid throughout the printing run.Challenge 3: Automated Integration Riverwood International is a manufacturer of beverages The packaging transfer company wanted to shorten the preparation time for the printing job.The company recently replaced its original two old presses with a 7-color KBA Rapida 142 press, which is to reduce the preparation time. The maximum speed of the model is 14,000 seconds per hour, and it has fully automatic plate change capability, which greatly reduces printing preparation and downtime.Although the factory has not yet adopted the CTP system, it has also prepared for the company. Because the Rapida press has CIP3 compatibility, most users are concerned about the productivity High, the presses produced by KBA have been automated in every process that requires operators to spend time and energy, including automatic cleaning of blankets and rollers; automatic setting of size and pressure; automatic ink path adjustment; and density of closed loops Or the spectrophotometric value detection system, this series of automation has greatly improved the production efficiency, and is also the economic return that can be obtained by upgrading the equipment.Komori Company also has a keen eye for automation and integration, and its printing presses have Historical development, complete with digital open architecture network (DoNet) features for color management and process control Lithrone recently developed a new type of Lithrone20 with LCD display to adjust ink balance and adjust ink/ The speed of the water and registering during the printing process include lateral and circumferential register movements and drum adjustments. Printing integration is not the trend, but also the most important task in the industry: to integrate the entire production process into a digital workflow and automated material flow. Heidelberg's new CP2000 control center processes the data directly and passes the data directly to the printer for printing via the prepress interface. Heidelberg also realized that the process of carton production must be automated in order to be profitable. In order to reduce the labor force, Heidelberger has improved the Logistics automatic material transfer system of the Speedmaster press. They use an automated roller transport mechanism to move the metal plates and stack them automatically, reducing manpower and material resources. .