Packaging and printing companies such as food, beverages, tobacco, alcohol, cable, pharmaceuticals and cosmetics need to use numbers frequently or at high speed. Bar codes, patterns or text are printed on the product or on the outer carton. Practice has proved that the small inkjet printer mentioned in this paper is applied. The carton printing type large-size machine can greatly improve the production efficiency and the clarity of the printed characters, thereby improving the quality of the products and enabling the enterprise to win a broader product market and better economic benefits. 4 If the ink line is not in the middle of the charging tunnel, adjust it with a needle nose pliers.
Trace the history of the number, bar code, pattern or text on the product. Before the invention of the non-contact continuous inkjet printer, the screen printer, the pad printer and even the more original mechanical roller punch were used to complete the printing. The result of this is that the text is poorly defined, time-consuming and laborious. The production efficiency is low, and because the quality of the product is lost due to the low quality of the printing, more and more customers and consumers are lost, causing losses to the production enterprise. Therefore, advanced equipment is urgently needed to replace them.
After the efforts of scientists and many scientific and technological workers, the small-name inkjet printer and the carton-printing large-size machine have been developed. At present, these non-contact continuous inkjet printers have become the first choice to change the backward situation. Small print printers are mainly used for smaller texts. Digital and graphic spray products. The carton coded large-size machine, as the name suggests, is used for large text. Digital and graphic prints are printed on the outer carton. These two types of non-contact continuous inkjet printers have at least the following eight advantages in common compared to previous printing equipment and technologies:
(1) The writing is clear and long-lasting: computer control, accurately print out the required numbers and texts. Patterns and barcodes, etc.
(2) High degree of automation: automatic implementation of dates. Batch and number changes to achieve unmanned operation of the printing process.
(3) Wide range of applications: can match any production line. It can print trademarks on the surface of plastics, glass, paper, wood, rubber, metal and other materials, different shapes, date of manufacture, description, batch number, etc.
(4) Programming is quick and convenient: input the required number, text, pattern and line number and other information through the computer or editing machine, and change the printing information, just press the number button to complete.
(5) The character size can be adjusted: the font width and height can be adjusted in an appropriate range, and the font can be arbitrarily bolded.
(6) The number of print lines is adjustable: the number of print lines is adjustable from 1 to 5 lines, and can be arbitrarily matched.
(7) Printing speed is extremely fast: the fastest printing can be 800 characters / sec or 120 m / min.
(8) Meet special needs: Print with invisible ink to perfectly print invisible information or anti-counterfeit identifier on the product.
Because the non-contact small-size inkjet printer and the carton printer are the crystallization of computer and high-tech, its reliability is quite high, the software version is easy to upgrade, and the cost of printing on the product is very low, and it has the above remarkable advantage. Therefore, small-size inkjet printers and carton-printing large-size machines can be widely used in various industries such as food, beverage, tobacco and alcohol, packaging, medicine, cosmetics, electronics, mechanical parts and cables. Many famous inkjet printers also have historical fault records. Even if a fault occurs, the maintenance personnel can quickly find the cause of the fault and solve it quickly.
At present, the famous small print printers on the market include Metronic Germany, VIDEOJET, Imaje, and DOMINO. EBS Germany is easy to use, its performance and quality are also quite good. The famous carton coding type machine has EBS Germany Yi Biejie, lINX British collar Xindajia and so on.
Code printer repair and adjustment
1, the principle of inkjet printing
The more advanced the equipment, the higher the requirements for maintenance personnel. Before repairing the printer, you must understand the principle of code printing, carefully read the use of the maintenance manual, preferably through the training of the full-time maintenance engineer of the printer. The following is a small machine as an example to introduce the principle of inkjet printing: under the action of high pressure, the ink enters the spray gun, and the crystal oscillator is installed in the spray gun. The vibration frequency is about 62.5 kHz. After the vibration, the ink is sprayed to form a fixed interval. At the same time, the charging pole is charged. The charged ink dots are deflected by the high voltage electrode and fly out and fall on the surface to be printed to form a lattice. The ink dots that are not typed are not charged, so they are not deflected and are directly injected into the recovery tank and recycled. The dots printed on the surface of the substrate are arranged in a column, which may be a full column, an empty column, or somewhere in between. The movement of the object perpendicular to the direction of deflection of the ink dots (or the movement of the shower head) allows the columns to be spaced apart.
The principle of the coding of the large-sized machine is different from that of the small-sized machine: the large-sized machine gun is equipped with a micro-shaped solenoid valve that can only open and close at a high speed, and the amorphous vibration, the text or graphics to be printed, etc. are processed through the computer board, through the output board. And output a series of 7 sets of electrical signals to 7 micro-shaped solenoid valves, so that the ink dots are printed on the printed surface to form a dot matrix to form characters. Number or graphics.
2. Maintenance example
Proficiency in the program menu of the printer, especially the SERVICE menu, is very helpful in quickly diagnosing the fault.
3. Adjustment of the printer
Due to the good performance and quality of the EXCEL-100 (170i), many adjustments are often required. The adjustments are summarized below.
(1) Alignment of ink flow
1 In the 02SERVICE menu, press F1 to make NKOFF change to NKON. At this time, HEAD flashes.
2 Loosen the horizontal locking screw slightly and adjust the leveling screw to direct the ink to the center of the recovery port. If necessary, clean the recovery tank and tighten the screws when finished.
3 Adjust the vertical adjustment screw so that the ink line is injected into the recovery tank, which is the best position at 1/4-1/3 of the height of the recovery tank. Too high is prone to phase failure, too low may only print half a character.
(2) Inspection of ink flow
1 Check the pressure gauge reading and adjust the ink pressure regulator so that the reading is around 40Psi.
2 Press F1 in the 04SERVICE menu and use the arrows to adjust the NOZZLEDRIVE value so that the ink breakpoint is in the middle of the charging tunnel to the throat (or 3-4 complete dots in the middle of the charging tunnel).
3 sets the nozzle sleeve, press SHiFT+F2 under the 03SERVICE menu, adjust the ink pressure to make the cursor in the SET position, then press the ENTER key, and press the F1 key in the 03SERVICE menu to observe the ink flow time (FLOWTIME), about 3 After the minute, the set value changes.
4 Turn "HIGHVOLTAGE" from OFF to ON under the 02SERVICE menu.
5 test printing. Under the above menu, turn "TESTPRINT" from OFF to ON, and move the nozzle on the surface of the object (note that there are continuous ink lines in the nozzle).
6 see the printing effect. Adjust the value of NOZZLEDRIVE appropriately, repeat the above steps until the printing effect is satisfactory, take the average value when adjusting the point, reduce or increase NOZZLEDRIVE by 2 points until the printing is not ideal, and then take the flat value.
Development of inkjet printing
Although the above-mentioned small-sized inkjet printers and carton printers have excellent printing performance, the innovative spirit of the world's scientists and scientists has made the world's most advanced laser printers. Let's take the Solarjet laser printer as an example to introduce the development of the printer.
The Solariet laser printer is one of the most advanced laser printers in the world: it can adapt to higher line speeds up to 300 m/min; the coding capability is stronger, up to 1800 (products) per minute; the range of typing sizes is even more Large, 100mm × 100mm, minimum line width 0.18mm: graphic size 0.5-100 as required; easy to install; thousands of operating hours maintenance-free.
The Solarjet printer combines the advantages of inkjet coding and laser coding with powerful computer processing capabilities. The original size icon display, built-in keyboard provides a wide range of icon marking options, and only requires simple training, the operator can be skilled. An external personal computer with icons and text editing can be used to generate characters such as complex icons and then transmitted to the printer system. The full range of marking options makes it easy to choose options, serial numbers, dates and times. The coded font and orientation are marked, and the ability to view the coding effect in advance is available. Therefore, the Solarjet printer has a wider application range and has the ability to integrate small characters and large prints. It is expected to become a new application device for the packaging industry (currently its equipment price is related to the small inkjet printer and the carton printer. Relatively high).
Solarjet printers also offer smooth, continuous letter printing for a wide range of packaging materials such as paper, cardboard, aluminum foil, metal, plastics and more.