Automatic loading operation guide

(PLATE) Automatic security: In recent years, many printer manufacturers have equipped printers with automatic or semi-automatic placement devices. The specific method of use of these security devices differs depending on the degree of automation of the machine and the manufacturer. Therefore, the specific installation method of different machines should refer to the corresponding manufacturer's operating instructions, but there are also some similar basic operation methods for the automatic security version. The steps are as follows: 1. The operator places the plate in the plate box; 2. The operator Select the printing machine that needs to install the new printing plate, and press the button to start the automatic loading process; 3. The security protection device automatically opens and the tail of the loading device moves to the printing plate cylinder; 4. The plate holder is opened and the old printing plate is disassembled. Next, unload to the plate mounting device; 5. The new plate leaves the plate loading device to the designated position, and then is loaded onto the plate cylinder; 6. The plate clamp clamps again, and the plate loading device returns to its original position. Protection is turned off again. Measuring the height of the printed version Although the height of the padding material has been calculated in advance, the printing plate can reach the desired printing height. However, after the printing plate is installed, the height of the surface of the printing plate needs to be measured. To measure this height, a hand-held pad caliper is required. This caliper can be magnetic or non-magnetic. Thoroughly clean the plate rollers before measuring to ensure that all gum and ink are removed. To avoid scratches or damage to the plate, place a light weight paper on the surface of the plate. If you use a magnetic caliper, you can measure it as follows: 1. Move the base of the caliper back and forth on the protective sheet of the plate until it rests smoothly on the plate cylinder. 2. Place the caliper's feet on the plate. Above, place the ruler in the slot of the base; 3. Adjust the dial of the caliper to return it to zero to ensure that the base is placed smoothly. Rotate the caliper feet and check that the reading on the other end of the caliper is also zero. If it is not zero, you need to reposition the base. After placing, repeat the above operation until the readings at both ends are zero, then complete this step; 4. Slide the ruler to the top of the pillow. If the reading is positive, it means that the surface of the plate is higher than the height of the surface of the bearer; if the reading is negative, it indicates that the surface of the plate is lower than the surface of the bearer. When using a non-magnetic caliper, the preparation process is the same as using a magnetic caliper. Subsequent steps are as follows: 1. Place the caliper and footing on the plate and turn its dial until the reading is zero. 2. Remove the caliper and place the feet on the rollers. If the reading is positive, the surface of the plate is higher than the surface of the bearer; if the reading is negative, the surface of the plate is lower than the height of the bearer. Positioning and starting up When the operator receives the printing plate, the non-graphic area of ​​the printing plate should be covered with glue. After the plate is installed, the non-graphic area gel grease should be washed off with water. Most graphic areas of the plate are hydrophobic and hydrophobic, so the graphic area of ​​the plate generally does not need to be protected. Then roll the ink roller (inking) and determine the printing position of the graphic area on the printing material. On the printing paper, the graphic area to be printed must be accurately positioned and the color should be pre-adjusted. Sometimes it is necessary to adjust the roller clamp to reposition the plate. When repositioning the plate, it is best not to adjust the front rails of the page, as this will change the “number of fixtures in the fixture” and cause registration problems in the plate. The plate can be repositioned as follows: 1. Use a pencil or marker along the edge of the plate to draw a straight line on the printing cylinder (on some printers, use the existing pre-register registration line); 2. In the printing cylinder Then draw a straight line to indicate the distance the plate must be moved. 3. Loosen the clamping screws of the plate tail clamp so that the position of the plate can be adjusted until the specified requirement is reached. 4. Adjust the screw of the tail clamp to the side of the clamp. Move to the plate to adjust the required length of 1/3. Take care to ensure that the screw at the other end of the clamp is separated from the sleeper. At this time, the printing plate should become loose and bulging in the moving direction. 5. Adjust the screws on the plate head clamps to align the plates. If the plate is not easy to move (excessive force may cause breakage), loosen the tail clamp fixing screw and remove it aside. 6. After aligning the marking lines, tighten the clamping screws of the fixture. Press the edge of the print plate to confirm that it is close to the print cylinder. When the plate is in place and running, the graphic area and non-graphic area of ​​the plate can be automatically protected during the printing process. However, when the printing equipment is stopped for more than one hour, the printing plate should be coated with plastic grease, and the graphic area should be kept in an ink-dyeing state. When the printing is stopped for a long time (including stopping at night), the ink is washed off with a suitable solvent, or the printing plate is used with the processing agent recommended by the manufacturer, otherwise the residual ink on the printing plate will become hard, so that the printing plate Can no longer ink. A common treatment agent is composed of asphalt-rubber, which deposits a layer of gum arabic in the non-image area and a layer of asphalt protective layer in the graphic area. Asphalt is oily and it will keep the lipophilicity of the teletext area for a long time. When printing is needed again, clean the plate with water. In this way, the Arabic gum in the non-graphic area will be washed out, while the asphalt will remain in the graphic area to facilitate the adsorption of ink. Note: Use only the manufacturer's recommended treatment agent. For example, if you use asphalt-rubber treatments, the graphic areas of certain brand plates will no longer be inked.