There are many factors involved in the process of the automatic laminating machine. It is necessary to understand the influence of each process parameter on the quality of the laminating film, and correctly handle the relationship between them to achieve the best effect. The technical parameters and precautions involved in the laminating process of the automatic laminating machine are as follows:
        1. Drying temperature-controlled between 50 ~ 70 ℃, can fully evaporate the solvent, and will not cause the film to overheat and deform;
        2. Compound temperature-the temperature of the imprint cylinder is controlled at 70 ~ 90 ℃, which can melt the adhesive and the film will not be deformed by overheating;
        3. Compound pressure-to ensure that the axial pressure of the impression cylinder is consistent, the pressure should be kept within 150 ~ 250 kg / cm2;
        4. Adhesive coating-the coating should be thin, controlled at 3 to 8 g / cm2, and the thickness should be 5 to 8 μm, to avoid excessive coating;
        5. Machine speed-a single sheet of paper should be controlled at 35 to 45 sheets / minute, and a roll of paper should be at 3 to 10 meters / minute, in addition to other parameters;
        6. Film tension-the tension is adjusted to the minimum to achieve the correct coating and compounding, to avoid excessive tension;
        7. Accuracy of the cylinder-The impression cylinder requires a smooth and clean surface without scratches or pits. It is necessary to ensure mechanical accuracy indicators such as ellipticity and concentricity;
        8. Environmental factors-to keep the environment clean, air purification devices are required. Control workshop temperature and humidity to prevent deformation of paper or film;
        9. Ink thickness——Deep ink and light printing, to avoid the surface tension drop caused by too thick ink layer and make the laminating film not firm;
       10. Ink drying-the ink should be dried thoroughly to avoid blistering;
       11. Ink additives-the amount of desiccant should be controlled to prevent the ink layer from crystallizing. The film surface of the crystallized ink of the automatic laminating machine will have a laminating phenomenon.

        By applying an automatic laminating machine to cover the printed matter, the brightness of the printed matter is greatly enhanced, so that the printed matter can achieve the anti-dirt, waterproof, anti-discoloration and heat-resistant, light-resistant and wear-resistant process effects, which improves the product The beauty of the product enhances the service life of the product. Therefore, it is very important to ensure the quality of the coating process. So, how does the automatic laminating machine avoid wrinkling?
        The product to be constructed by the automatic laminating machine must be straight. Handle uneven paper with "ruffled edge" and "tight edge" phenomena. Paper with "ruffled edges" can be baked, and paper with "tight edges" can be hung to dry. Be sure to wait for the blot to dry before coating, otherwise it will cause blistering or hair pulling.
        The paper used in the automatic laminating machine is generally coated paper, offset paper, and whiteboard paper. The paper wrinkle phenomenon that occurs during lamination is generally in the following situations:
        1. Improper temperature and humidity control in the workshop. When the relative humidity is too high, the paper absorbs moisture and starts to "ruffle", causing the paper to wrinkle during the lamination process, and the temperature and humidity of the workshop must be strictly controlled.
        2. If the ambient temperature is too high or the laminating temperature is too high, the paper will “tighten” and cause the paper to wrinkle. It can be flattened with a pressing plate, increase the number of times of knocking and kneading the paper before laminating, and reduce the environment and the temperature of the laminating.
        3. The uneven pressure of the roller causes the paper to wrinkle during the lamination process. In this case, the pressure of the roller should be corrected before starting operation.

        Can glazing replace laminating? In fact, in addition to the laminating process of the laminating machine, UV glazing can also play a certain role in protecting and decorating the surface of the printed matter. The two are very similar in many functions. Due to the relatively low cost of UV glazing, the development is relatively fast, and the product is very attractive, so it also has a certain market share in some post-press processing fields. Some people who are optimistic about UV glazing technology even believe that this technology can replace the coating technology and develop independently.
        In fact, this is just a wish of people. According to some printing companies that have applied UV glazing technology, the most widely used UV glazing is local glazing. Local UV glazing can improve the grade of books, but in most cases, this local UV glazing process is also in It is carried out after laminating the laminating machine, and the previous laminating process must be solvent-based laminating.
        In addition, there are still many deficiencies in UV glazing compared with laminator lamination. For example, the protective effect, folding endurance and abrasion resistance of UV glazing are not as good as those of film coating, and there are limitations in many fields, such as packaging boxes. UV glazing also needs to be invested in printing equipment and UV curing equipment, and the film has a ready-made equipment foundation and mature technology; in addition, some UV varnish will also volatile odors during the coating process, affecting the operator.
        Today's printing houses and publishing houses attach great importance to this process, and believe that in the printing of books and periodicals, UV glazing can replace the laminating process. However, in general, UV glazing still has limitations in many aspects, there are still many problems in the process, and it can not completely replace the coating process.

        The laminating machine can be divided into two categories: instant coating laminating machine and pre-coating laminating machine. It is a special equipment for paper and film. Instant coating laminating machine includes three parts: gluing, drying and hot pressing. It has a wide range of application and stable and reliable processing performance. It is currently widely used in China. Pre-coating laminating machine, no gluing and drying parts, small size, low cost, flexible and convenient operation, not only suitable for laminating processing of large batches of printed products, but also suitable for laminating small batches and scattered printed products such as automated desktop office systems Processing is very promising.
        The pre-coating film machine part is as follows:
        1. Composite parts. The composite roller and calender roller group including the group. The compound roller is provided with a heating pressure roller and a silicone rubber composed of a pressure roller. The hot pressure roller is a hollow roller, equipped with a heating device inside, forging, polishing, fine grinding and processing of the hard chrome-plated surface; the hot pressure roller temperature sensor tracks the sampling and is corrected by the computer at any time; the composite material pressure adjustment eccentric cam mechanism Can be adjusted. The calender roll group is basically the same composite roll group, that is, the pressure roller composition is pressed with silicone gel from the pressure of the chromium roll, but there is no heating device.
        2. Computer control system. The computer control system uses a microprocessor, a main board configured with a laminator hardware, a numeric keypad, an optical isolator board, a power board, and a stepper motor power driver board. Print the input section. The automatic conveying mechanism can ensure that there is no overlapping and equidistant input of the composite part in the transmission. Generally, it is realized by accurate conveying and high-precision inflation or friction control. When the composite format is small font, it can also meet the above requirements of. Transmission system. The clutch high-power motor drive is controlled by a computer. After being decelerated by three chain-driven gears, the drive's paper feed mechanism and compound section and the calendering mechanism silicon pressure rollers rotate. Maintain proper working pressure, pressure roller group adjusts pressure steplessly.

        The laminating machine can be divided into two major categories, namely glueless laminating machine and pre-coating laminating machine. It is a kind of special equipment for paper, board and film laminating. It is combined with rubber roller and heating roller to form a product of paper and plastic.
        The pre-coating laminating machine adopts the form of glue coating, such as using solvent volatile glue, water-based glue or hot-melt adhesive to pre-coat on the laminating material for hot pressing, while the glueless laminating machine is different from the pre-coating type Laminating machine, glue-free coating does not use conventional biaxially oriented polypropylene film (OPP), but PE film with high pressure polyethylene as the main material, PE film has better hot melt and plasticity, PE film After a special strong treatment on one side, the PE film can be hot melt compounded on the color printing paper with a glueless laminating machine. This non-adhesive coating can withstand temperatures ranging from 20 to 120 ° C. PE film is a material with a weak van der Waals force. The waxy additive composition makes its surface appear to be a weak interface layer.
        Therefore, in the hot melt state at a lower temperature, its adhesion to paper is also smaller, so in the process of non-adhesive film, a layer of auxiliary material needs to be placed between the heating roller and the PE film (for One side surface of the PE film was specially treated with strong force), and then passed through the non-adhesive film laminating machine, and then the film product was removed from the auxiliary material. In addition, there is also a glue-free laminating process for the glue-free composite film, which can be directly compounded with paper without glue at a certain temperature and pressure, mainly used for self-adhesive label lamination.