Xynatech is developing an independent wire-cutting magnetic die-cut embossing technique that is inexpensive and an ideal replacement for bulky bump-on-stencils. The system uses a separate stainless steel embossing stencil to process a variety of substrates, opening up new fields for short-format decorative embossing applications, such as embossing the printed image of the label. If a conventional embossing stencil is used, it is limited by the cost of mold processing. Some packaging factories have also been successful in the trial of this technology.
This system is relatively simple. The Xynatech system uses a compressible PC material (material thickness can be changed) to adjust the pressure of the impression cylinder. The stainless steel embossing stencil is fixed on top of the magnetic cylinder. This technique allows packaging printers to control the pressure of the embossing.
The price of traditional embossing stencils can reach 3,200 US dollars, and the price of the imprinted plate material is 0.45 US dollars per square inch. So, the cost of a 10-inch X 12-inch plate is $48. Very thin liner materials can be reused many times.
XYnatech uses a rugged stencil for extensive testing on a wide range of materials to determine the most suitable stencil material and thickness. Folding carton embossing system uses yin and yang stencils, as well as cutting and indentation functions. Therefore, the XYnatech system is equipped with embossing system to meet the requirements of the line folding carton processing market and the label market.
At drupa 2004, people saw that Xynatech's PC indentation die-cut yin and stencil systems were installed on Omet's VaryfleX presses, and they gained a lot of valuable experience on narrow-web reeling.
For Xynatech, carton die cutting is no longer a critical issue. The key lies in the transfer platform and stripping device on the press. For example, Omet's Varyflex can run at 500 feet per minute for a 26-inch format.
The waste removal system is very reliable and easy to set up. The stripping needle is placed in a lower position on the magnetic roller, and then through a honeycomb and vacuum adsorption system, the waste is removed like a "flowing water".
This technique also applies to indentations. In narrow web printing, the negative and positive stencils combined with the cutting and creasing function are installed on the last station, attached to the magnetic cylinder, and the PC can be replaced without removing the magnetic cylinder during the printing process. stencil. In response to the need to quickly replace jobs, the press manufacturer provided a removable die-cutting unit so that offline die-cuts could be adjusted and the time to replace the job could be shortened. For a large amount of cutting, the deviation of the press is required to be as small as possible.
The feedback from the end user of the carton for cutting and indentation indicates that aesthetics is the most important, and the indentation width should not be too large, so the way of indentation must be improved. In fact, PC indentation is easier to control than PC indentation because PC indentation can be done with different tool widths, which is not possible with steel indentation. Today, PC templates can actually be used on every imaginable indentation shape. The indentation can be raised, integral, or partial pressure, and the thickness of the paperboard that can be processed ranges from 0.011 to 0.032 inches.
Long, short, and high value-added carton processing is a major profit point for narrow carton packaging and printing plants. The use of magnetic stencils for long-format carton processing is also profitable. The Xynatech system already has a successful example of a long-lived application in China. For example, a 16-in. Ma Andy printing press processing milk packaging box. The long version of the flip cigarette pack is another profit growth point.
There is an interesting phenomenon in China that uses masking tools to improve the security of packaging. This technology was developed by Xynatech for the printing of stamps. It is an irregular punching technique that involves designing irregularly shaped templates. Use a fish pattern on Hong Kong stamps. The application of this technology in the field of labels and lined carton processing is very great.
Source: "Printing Technology" 2005, 10 (Packing and Decoration Printing)