As a Paper Machine Clothing Manufacturer, share with you.
Single Layer Forming Fabric
1. Too fast abrasion of the screen edge: The most serious wear of most paper machines are at the joints with and without vacuum (10-15cm of the screen edge); Solution: 1. Increase the opening of the vacuum box as much as possible. Staggered width. 2. Add normal pressure lubricating water to the edge of the vacuum box. 3. Add stiffeners in appropriate positions. 4. Check whether there are edges or gaps in the side wiper and the vacuum box. Especially the joints of the ceramic panels are weak links 5. Check whether the edges of each roll are severely worn (the diameter becomes smaller after wear, so that the tension of the mesh is smaller than the normal mesh surface and further accelerates the wear)
2. The overall wear is too fast: 1. The panel quality is not good enough. 2. The net tension is too small, the return tension of the single-layer net is 3-4kg/cm, and the return tension of the two-layer forming net is 5-6kg/cm. 3. Poor packing quality. 4. The net has a large air permeability and there is a lot of filler loss, and there are too many filler particles between the net and the vacuum box panel, and the overall wear of the net will be faster. 5. The net air permeability is small and the water filtration is slow, but the vacuum degree increases and the wear is accelerated. 6. The rotation speed of the guide roller and the wire speed are not synchronized. 7. The speed of the upper and lower network is not synchronized.
3. Partial longitudinal wear and rapid wear: Whether there are stubbles, unevenness and gaps in the forming plate, wiper board, and vacuum box panel; whether the rollers are locally worn and rusted.
4. Partially longitudinally long drum: Whether there are stubbles or unevenness on the forming plate, wiper board, and vacuum box panel, whether the breast roller vacuum roller has bumps such as solder joints, and whether the rubber coating roller has impurities.
5. Guide roller winding pulp: the cleaning water pressure is low and there are many fibers inside the net; the net air permeability is low; there is a problem with the cleaning method. The two and a half layers of the net should be cleaned on the paper outlet surface of the net. Whether the nozzle is clogged, the best distance between the nozzle and the net surface is 15 -20cm.
6. Vacuum box top slurry: improper mesh air permeability, short slurry fiber loss, poor quality of retention aid or small addition amount.
7. Large fluctuation range when the net is running: the corrector is not working properly, and the side cutting of the net is not straight.
8. The net becomes narrow after using for a period of time: local wear of the forming plate, wiper board, vacuum box panel or guide roller causes the marking line of the net to run for a period of time to become slanted.
9. Comparison of the life of the D-type device and the previous net: The addition of the D-type device can effectively solve the two-sided difference of the paper, speed up the dehydration and increase the speed, but the life of the forming net will be reduced, mainly because the water line becomes shorter and the wear is accelerated. General life expectancy is reduced by 1/3 or even 1/2.
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