2) Check the platen vacuum.
Check the platen vacuum performance before the plate is exposed. During the operation, wipe the platen glass cleanly. Take the publication under the yellow light or dim light, avoid contamination, bending and scratching as much as possible when taking the plate. Put the plate on the printing frame, stack a 60-line/cm gray contact screen on the top, start the vacuum system, and check the uniformity of the suction in the entire plate.
3) Determine the light intensity of the edge of the plate at the height of the platen light source should be controlled to be equal to about 90% of the light intensity at the center of the plate. The height of the light source should be at least equal to the length of the diagonal of the plate so that the plate can receive light evenly.
4) Direct method of test method for exposure of plates A UV illuminometer is used to directly detect the exposure of a plate.
Indirect method First use the signal strip to test the resolution of the plate, and then find the exposure.
2. The development points are manual and mechanical. The use of standardized development methods will reduce many of the drawbacks that affect performance during the development process. It is recommended to use Huaguang brand developer, the dilution ratio is 1:6-1:8, the development temperature is 23°C plus or minus 2°C, and the development time is 30s-60s.
3, revised version of the common repair fluid such as Fuji P-L type, Huaguang PW type, Lide LD type and so on. In order to eliminate excess images and spots on the plate after washing with developing water, apply a small amount of an amendment to the removed area, leave it for about 20-60 seconds, wipe off with a damp cloth, and then wash.
4. Baking plate baking can improve the binding force of coating chemicals and aluminum plate base to improve the resistance to printing force. The baking solution was poured onto a plate that had been washed with developing water, and was evenly wiped with a rubber blade, and wiped with a sponge. (China Gold Packaging Network is the portal of the metal printing and packaging industry) and then baking in the baking machine for 5-7 minutes, the temperature is controlled at 220-230 °C. After cooling, put the developer into the developer for 1 minute and then rinse.
5. The purpose of the protective rubber coating protective adhesive is to improve the water absorption performance of the non-affected zone. After washing with developing water, use a sponge to dip the protective glue, wipe it evenly and thinly on the plate surface, then blow dry or dry it and keep it away from the light for printing.
Bearings play a vital role in the machinery industry. Here are a few of the main roles of bearings in the machinery industry:
1. Support and positioning: Bearings are used to support rotating shafts and wheels so that they can rotate smoothly and ensure that their positions are accurate. Bearings enable machinery to operate efficiently by reducing friction and resistance.
2. Transmit force: Bearings are able to transmit force in mechanical equipment so that it can work properly. For example, crankshaft bearings in automobile engines transmit the power generated by the engine to enable the vehicle to move.
3. Reduced friction and wear: Bearings reduce friction and wear in mechanical equipment by providing lubrication and reducing direct contact between metal surfaces. This not only extends the service life of the mechanical equipment, but also reduces the frequency of maintenance and repairs.
4. Protection against vibration and noise: Bearings reduce vibration and noise in mechanical equipment. By balancing and stabilizing rotating parts, they reduce vibration and noise during the operation of mechanical equipment.
In conclusion, bearings play a vital role in the machinery industry, supporting and positioning rotating components, transmitting force, reducing friction and wear, and preventing vibration and noise. Without bearings, machinery and equipment would not function properly.
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