When the panel laminating machine is working, the paper is subject to high humidity or the ambient temperature of the production site is high and the humidity is high, causing the paper to be tightly edged or forming a wave-like ruffle. Sometimes the roller pressure is not uniform or the guide roller gap is not equal, resulting in uneven paper and wrinkles. In addition, when the conveyor belt conveys paper, the paper prints are skewed and the rules are irregular, and such problems may occur.
There are three ways to deal with this fault: 1. Adjust the guide roller conveyor belt and adjust the side gauge, and pay attention to the paper feed moment is neat; 2. Adjust the lamination pressure and guide between the rubber roller and the heating roller of the pressure roller Roll gap; 3. Strictly control the temperature and humidity changes in the workshop, knock the deformed printed paper flat, and then carry out the laminating operation.
When the printed matter is processed on the machine, the phenomenon of curling is generally caused by four factors: 1. The climate is humid, the temperature and humidity of the production site are large; 2. The tensile force of the plastic film is too tight; 3. The paper print is deformed by moisture. 3. The heating roller of the laminating roller has a high temperature, and the laminating pressure between the rubber roller of the laminating roller and the heating roller is large.
The treatment methods are:1. Adjust the pulling force of the plastic film; 2. Reduce the heating roller temperature of the laminating roller and adjust the lamination pressure between the rubber roller and the heating roller of the laminating roller; 3. Flatten the product after laminating and then divide Cut; 4. Control the temperature and humidity of the production site environment.
The whitening of the printed product is generally caused by the excessive temperature and humidity of the veneer environment, and the outer layer of the printed paper is dry and the inner layer is still not dried. Sometimes such problems occur when there is moisture between the paper print and the plastic film overlay. The method of controlling the fault is to strictly control the temperature and humidity of the production site environment.
(d) Air bubbles
The paper has a large humidity, and the printed product is veneered without drying. When the product is gradually dried, the water vapor in the paper evaporates, and spots or bubbles are formed between the surface of the printed paper and the plastic film. Sometimes the paper is printed with dust and dust or the surface of the plastic film is dusty, dirty, or smudged.
To solve the problem of bubbles, we can start from five points: 1. Clean the surface of the paper and the dust and impurities on the surface of the plastic film; 2. Strictly match the ratio of the adhesive and the thinner, adjust the thickness of the adhesive layer and the concentration of the glue; Dry the paper prints and adjust the temperature and humidity of the workshop; 4. Adjust the gap between the two rollers of the coater to make them uniform and replace the aged adhesive glue; 5. Control the anti-adhesive agent in the ink when printing. Add and measure the quick-drying agent.
When the veneer is pressed, the temperature of the heating drum or the temperature of the drying tunnel is too high, and the plastic film is softened and deformed, and the film is wrinkled under the pressure cooperation of the heating roller. Sometimes, when the laminating machine is operated, the film tension is too tight, or the speed is too fast. The adhesive glue is not completely dried, and the film is caused to wrinkle or wrinkle.
The solution is as follows: 1. Reduce the host speed of the laminating machine, slow down the transfer time, and press the film with the paper print in the state where the adhesive glue is completely dry; 2. Adjust the traction force of the film, adjust the stretch Roller, loosen the film pressure, make the film flattened and then press-fit; 3. Adjust the temperature of the hot-pressing roller or the temperature of the drying tunnel to meet the conditions of hot pressing.
When the laminating machine is under pressure, the speed is fast, the temperature is low, or the ink layer of the paper print is not dry, it will cause the separation after the paper-plastic is not strong.
To avoid such failures, the following methods can be used: 1. Increase the pressure, adjust the speed and temperature appropriately; 2. Extend the drying time of the paper prints.