1. The glue part. The gluing part is equipped with an adjusting device to adjust the amount of gluing to meet the requirements of different printed parts. The gluing roller adopts rubber roller or steel roller.
2. Drying part. The drying tunnel is generally 2 ~ 3m long. The drying tunnel entrance of the laminating machine is provided with an infrared lamp tube and an electric fan. The upper part of the drying tunnel of the automatic laminating machine also has a high-power electric heating tube and an exhaust fan, and the temperature can be adjusted to dry the adhesive and eliminate the exhaust gas.
3. Hot pressing part. This part is the key to the fully automatic laminating machine, which is directly related to the adhesion fastness of the laminating products. The principle of hot pressing is that the adhesive can quickly infiltrate and penetrate into the surface layer of the printed matter in the molten state, so as to obtain a strong bonding interface layer. The hot pressing part is composed of a group of rollers. One of the hollow metal rollers is equipped with an electric heating tube, and the temperature can be controlled automatically. The pressure of this group of rollers can be adjusted.
It is concluded that the laminating machine is composed of three parts: gluing, drying tunnel and hot pressing. For gluing, it mainly uses an adjustment device to adjust the amount of gluing to meet different needs. The drying tunnel mainly uses electric heating tubes and fans to complete the drying of the adhesive on the drying tunnel of 2 to 3 meters. Hot pressing is mainly to obtain a firm interface layer and achieve the purpose of being durable.
The main problems with the covers and sheets after being coated with instant coating are:
The surface blisters, wrinkles, uneven bending, separation and separation, and not easy to store, etc. These quality problems have not been solved for many years, the reasons are also many, such as:
1. The effect of different paper types.
2. The influence of different ink colors.
3. Different climate effects.
4. Influence of environment and conditions.
5. Enterprises lack the influence of scientific management.
6. The impact of personnel quality.
The first slitting method is to punch a hole on the film after the film is coated and then break it. This method is suitable for manual machinery.
The second is the hot knife slitting we want to introduce:
1. Hot knife slitting technology is suitable for all films, especially PET film, aluminized film, etc. It is characterized by high slitting speed, precise slitting, no tail film, and can smoothly enter the next process without adding labor.
The film laminating machine of this slitting method is suitable for the packaging of high-grade carton, such as the exquisite packaging of high-grade alcohol, cosmetics, high-level nutrient supplements and food.
2. The hot knife active laminating machine can directly make gold and silver cardboard. Gold and silver cardboard of various colors are widely used on the delicate packaging of many alcoholic and cosmetic products. The cost of these gold and silver cardboard is relatively high. Aluminium-coated film can be directly laminated to various types of gold and silver cardboard in the hot knife laminating machine. A sum of money.
3. The hot knife active vertical laminating machine can also make colorful glue directly. At present, a new bright spot has emerged in the field of laminating ---- colorful laminating adhesive, its birth adds a bright color to the laminating technology.
The third cutting method is to use a "chain knife", but there are tail film, broken film, especially thick paper, the tail film is more significant, which has an impact on the next process.
The fourth slitting method is to use a fast-rotating flying knife to cut a gap in the coated product, and then pull it off, but the laminated product is not accurate, and it simply presents scrap.
What factors will affect the laminating of the pre-coating laminating machine? There are three main factors: temperature, pressure and speed. I will share with you in detail below.
The first factor that should be paid attention to in the laminating of the pre-coating laminating machine: temperature
Temperature is the first hub of laminating. The adhesive used for pre-coating is hot-melt adhesive. Temperature determines the melting state of hot-melt adhesive, determines the leveling function of hot-melt adhesive, and determines the direction of hot-melt adhesive molecules to BOPP. The diffusivity between three molecules of the film, printing ink layer, paper substrate and other substances also determines the crystallinity of the hot melt adhesive. Only by accurately controlling the temperature of the working area can the solid hot melt of the pre-coated film on the film be made The adhesive layer is completely melted into a viscous state, with suitable activity to achieve wetting and bonding to the surface of the printed matter, and at the same time to ensure immediate solidification after compounding, so that the laminated film product has a smooth appearance, bright enough, and the adhesive layer has a good degree of melting, no Crease. And can peel the ink.
The temperature control of the laminating process also affects and determines the hot-melt adhesive used for laminating to solve the changes when heated, as well as the resistance to the new heat. Therefore, strict temperature control is the primary hub for precoating of precoating and precoating machines.
The second major factor that should be paid attention to in the laminating of the pre-coating laminating machine: pressure
While accurately controlling the laminating temperature, appropriate pressure should also be used. Because the surface of the paper itself is not very smooth, only under the pressure can the hot melt adhesive in the state of viscous flow be fully removed from the air on the surface of the printed matter. Wetting the surface of paper prints.
Produce colloid molecules to the ink layer of paper printed matter, paper molecules diffusion, misalignment, achieve good adhesion, and form a complete coverage of the entire surface of the printed matter, so that the printed matter is bright, no fog, leveling of the glue layer, no folding Marks, good bonding effect, and without wrinkling, appropriate increase in pressure can make the thermoplastic curing performance of the hot melt adhesive fully manifest, to ensure that the laminating product is added to the process after compounding A variety of physical peeling, impact forces, etc. have a strong resistance to achieve the same speed of the internal structure and surface state of the composite printed matter.
Paper lamination is a dynamic compound motion. The speed of the paper determines the time the paper-plastic composite stays on the thermocompression bonding interface, and also determines the input temperature, pressure, and temperature of the lamination machine. The actual action value of the paper-plastic composite during the actual production process.
The third factor that should be paid attention to in the pre-coating laminating machine: speed
When the two factors of lamination temperature and pressure are fixed, the change of speed will change the lamination effect, and because of the upper limit of temperature and the limitation of pressure supply, it will only change from the direction less than the set value, and will vary with the speed. Speeding up, the drop rate is significant, the heat and pressure force declines, and the composite effect deteriorates. The running speed is too fast, the bonding is not strong, there will be fog, and if it is too slow, it will be inefficient, and even bubbling. Therefore, the compound running speed determines the time for the pre-coated film and paper print to achieve bonding.
The actual action value of the three factors of temperature, pressure and speed has a certain range. Because of the different equipment, we need to find the best effect value in practice to ensure the composite effect of the pre-coating film and create a favorable premise for the spine of the cover of the next step of the glue nail cover not to leave the shell and not foam.
The motor is the power device of the laminating machine. Our products use 1.5KW motor as the power source, so the protection of the motor is an important part of the equipment. Reasonable use of the motor will extend the service life of the laminating machine and supply the laminating power of the laminating machine.
1. Remove debris. Eliminate dust on the motor, nearby debris, and accumulated flammable and explosive products.
2. Before starting, check whether the motor change is sensitive, whether there is conflict, jamming, crosstalk and abnormal sound. With or without jamming, is the belt connection outstanding, and the special transmission belt must not be too tight or too loose.
3. Before starting, check whether the line voltage is normal. It is not suitable to start if it is too high or too low. Generally, it should not exceed the additional voltage value + 10% ~ -5% before starting.
4. Rotational disposal. When starting, it should be stopped immediately, after any two-phase power line is reversed and then started, it can be turned forward.
5. It is necessary to cut off the electric motor for overhauling the motor.
Automatic laminating machine is mainly used for books, posters, color box packaging, handbags, etc. In response to the continuous improvement of global environmental awareness, oil-based lamination will be gradually replaced by water-based lamination. The new laminating machine designed by our company is suitable for laminating water-based / oily two kinds of glue and pre-coated film. It is a "one machine, three uses" and "high speed power saving" equipment.
The head of the automatic laminating machine adopts the feeder head automatic paper feeding system, the pressing steel rod adopts the hot oil circulation heating system, the compound pressure adopts the pneumatic device, the electrical system adopts PLC programming control, and the cutting system is equipped with a knife And the rotary flying knife cutting device, the back of the laminating machine is equipped with an automatic paper collection system, the whole machine occupies a small area, has a high degree of automation, easy operation, and high stability. It is the first choice for the printing and packaging industry. Better economic benefits can be obtained in mass production.