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FAQs about Forming Fabric

  • Q What is the reason for the rapid wear of the edge of the forming fabric?

    A Most of the most serious wear is at the joint between the vacuum and the non-vacuum, about 10-15cm from the edge of the forming fabric. At this time, it is necessary to increase the width of the vacuum box opening, add normal pressure lubricating water to the edge of the vacuum box, or apply reinforcing ribs at appropriate locations.

  • Q Why does the forming fabric produce delayed wear?

    A Hysteresis wear is caused by the running speed of the forming fabric being lower than the surface of the dewatering elements and other devices in contact with it. It usually occurs at the couch roll or drive roll.

  • Q How to deal with the forming fabric when the paper machine is shut down?

    A
    If the shutdown time is short, on a paper machine with low load and low pulp temperature, the original operating tension value can be retained;
    If it is on a high-speed paper machine with high load and high temperature, even if it is shut down for a short time (the fourdrinier paper machine is at creeping speed), the tension must be relaxed;
    If the machine is shut down for a long time, all tensions need to be relaxed and the forming fabric needs to be stored without tension. It can also be washed and unrolled for storage.

  • Q What should be paid attention to when using the forming fabric in normal times?

    A When the paper machine is shut down, turn off the vacuum water suction device to avoid partial sinking of the forming fabric and accelerating the wear and wrinkling of the forming fabric. Turn off the high-pressure water at the same time to avoid partial sinking of the forming fabric and accelerating the wear and wrinkling of the net.

  • Q What should be paid attention to before installing the forming fabric?

    A Before starting the machine, it is necessary to check and remove foreign objects on the forming fabric and the automatic net guide system according to the direction of the arrow on the forming fabric.
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