Requirement of glue printing for automatic printing machine

At present, automatic printing is mainly based on printing thermosetting ink, and the process is relatively mature. On the contrary, it is only in its infancy in terms of printing glue and other water-based materials. The reason is both the limitations of the equipment and the applicability of the glue material. In recent years, with the vigorous development of machine glue, many glue products have passed trial practice on printing machines and have been put into mass production. The emergence of machine-printed glue is also accompanied by the adjustment of automatic printing machines, in order to adapt to more common glue products other than thermosetting inks, making the combination of automatic printing machines and glue possible. On the one hand, it shows that both automatic printing machines and glue products have taken a big step forward, and on the other hand, it caters to the needs of most printing factories that use glue printing as the main source of orders, thereby promoting printing Manufacturers' desire to invest in fully automatic printing machines.

Although the application range of machine glue is still relatively narrow, and the technical process has yet to be perfected and mature, it is undeniable that fully automatic printing compatible with thermosetting ink and glue will have greater appeal. So, which type of automatic printing machine is suitable for glue printing? What are the requirements of glue printing for automatic printing machines?

The biggest advantage of the automatic printing machine is that it has fewer employees, convenient management, fast printing speed, high quality and accurate precision. It should be said that it is the first choice for printing manufacturers to buy. The advantages of disc type and oval printing machines are also different. However, For glue printing, most of the automatic printing machines on the market that are only suitable for thermosetting ink printing, especially the disc-shaped automatic printing machines, have few stations because their diameter cannot be made very large. (No more than 20 stations at most), so the lack of drying positions of this type of machine is a congenital deficiency, and it is far from reaching the drying time required for glue printing, so the effect of glue printing is not only unsatisfactory but also The printing speed cannot be controlled. The glue printing of some disc machines is not as fast as the manual treadmill printing, and the printing effect of the product is not necessarily good.

On the contrary, the oval automatic printing machine can have more than 50 stations, so as to ensure that each printing head can be equipped with a flash drying, and also has a cooling station, which overcomes the shortcomings of the disc machine and makes Like ink printing, glue printing has the advantages of fast speed, high quality, strong precision, low cost of use and high return on investment. Therefore, the oval printing machine can be said to be a good choice for glue machine printing.

Of course, the situation is not set in stone. Recently, the automatic disc printing machines launched by many manufacturers also have the function of printing glue. The printing machine can be applied to the most common glues, water-based inks and thermosetting inks at the same time. The upgrade of this kind of product is a pleasant thing.

As a printing manufacturer, before investing in a fully automatic printing machine, according to your business type, for example, whether the current order is mainly glue or thermosetting ink; future development plans, etc., compare the models and functions provided by suppliers, and carry out Adequate consideration and selection are very important. For glue printing, its requirements for automatic printing machines mainly include the following four points:

 The number of sets of colors required is large

For glue printing, a primer must be used first to cover the surface paste. If one time is not enough, it must be printed twice or even three times. Often a white color needs to be primed twice, and then covered with the batter three times. For a fully automatic printing machine, 5 stencils are needed, and 5 printing heads are needed. If there are more colors, a fully automatic printing machine with more than a dozen printing heads is required. Therefore, if you want to use a fully automatic printing machine for glue printing, you need at least a machine with more than 10 printing heads.

The number of workstations required is large

Glue printing requires sufficient space for drying in the process of each set of colors, so that the surface of the glue can be cured to form a film immediately before entering the second set of color printing. Of course, in order not to block the screen, the platen also needs to have a certain heat dissipation process, so the number of stations of the automatic printing machine is required to be more.

The process of glue machine printing is generally as follows: screen printing on the printing head, drying of the next board, and cooling of the next board. That is to say, a color register requires at least 3 stations. If it is to print 10 sets of colors, 30 worktables are required, plus a cloth spreading position and a cloth receiving position, a machine needs at least 32 tabletops. If you print 12 sets of colors, you need at least 38 platens. At present, some printing factories have proposed a machine with 18 sets of colors, which requires at least 56 platens.

Large plate area required

As a user, it is always hoped that a machine can print the larger the area, the better. Of course, the area of some patterns is really large, in case of emergency. If the investment budget allows, a larger platen can be prepared. Just make it as big as possible.

Color registration accuracy requirements

Accurate color registration accuracy is the basic requirement for each automatic printing machine, but printing accurate color registration patterns cannot be guaranteed by the printing machine alone, because it also involves the influence of screen production on the color registration accuracy. . With reference to the above four points, I believe that it can help printing manufacturers to choose a fully automatic printing machine suitable for glue printing.