To produce high-quality corrugated carton with 4 color, in addition to choose a stable and efficient 4 color flexo carton printer (with a doctor blade), attention to details in the production process is also the key. So what key details do we need to pay attention to?
Pay attention to the details of the printing plate installation
(1) Be sure to lock the printing plate tightly-make sure it is tight, very tight!
If the printing plate is not locked, there will be a gap between the printing plate and the roller during the rotation of the large printing roller. In this way, it is difficult to ensure that the printing plate pattern is printed at the same registration position every time, and it is difficult to adjust the color registration.
Pay attention to the details when installing the doctor blade
(1) When installing a new doctor blade, pay attention to the details of the installation method. Many product quality problems are often caused by incorrect installation of the doctor blade. For example: uneven ink scraping, scratches and so on.
Doctor blades generally have a fixed scraper clip. The scraper clip is fixed by many screws. Many people can install the doctor blade casually when installing; in fact, do not fix the screws on both sides first when installing the doctor blade, which may cause the doctor blade to arch in the middle. , Resulting in uneven scraping.
The correct method is to use your hand to level the doctor blade， push it to the bottom position, and tighten each screw in turn, so that the entire doctor blade is flat and straight.
(2) In addition, be careful when installing, avoid being rude, and shaking the squeegee forcefully, this will cause damage to the blade of the squeegee, and the natural damage will reflect the stroke line scratches on the printing, which will seriously affect the printing quality.
Pay attention to the selection and control of ink when using the 4 color carton printer
(1) High-quality printing requires high-quality ink. Don't buy ink blindly. The number of anilox roller lines of the equipment, customer product requirements, technical parameters, etc. should be provided to the ink supplier, who will use professional technology to deploy suitable ink.
(2) In addition, in the printing process, the viscosity of the ink should be controlled, and the ink additives should be used with caution. High-line multi-color printing pays special attention to color stability; use less water and ink additives, try to prepare ink that meets the requirements, make data records when testing samples, and debug the standard ink of the product next time.
Pay attention to recording the proofing data parameters
(1) In order to ensure the production of the second order after proofing, relevant data parameters should be recorded after successful proofing, such as printing color sequence, ink viscosity data, etc. Only after mastering these data can it be quickly set up during the second production; mass production, without having to spend a lot of effort and time again on proofing.
(2) The other is the details of printing machinery operation, which mainly tests the experience of operating the printing press; however, patience and carefulness are the most important, and you must not be rude and sloppy!
The above are the key elements of operating a 4 color carton printer. Have you learned it?
