Constant tension control method for paper making blanket needling machine

Abstract

The invention relates to the technical field of paper making blankets, and in particular to a constant tension control method for a paper making blanket needling machine. The method includes the stepsthat blanket tension is automatically controlled through a PLC control engine, a servo motor, a tension sensor and an absolute value encoder of a main tension car; it is ensured that a blanket is ina constant tension range during the whole process of manufacturing, tension and length of the blanket are automatically displayed during the process of needling; two modes of constant tension and constant length can be switched, operating is conducted in either mode, simultaneously values of the tension and the length can be automatically displayed. The constant tension control for the paper making blanket needling machine has the advantages that by the tension control method and the device, detection values during the process of a loom operating are not affected by measurement errors caused by the movement of a rear beam and opening and closing of a heald frame, the constant tension is achieved, and the evenness and the uniformity of fabric cloth weft clearance is kept.

Description

technical field [0001] The invention relates to the technical field of papermaking felts, in particular to a constant tension control method for a papermaking felt needle punching machine. Background technique [0002] The loom that uses electronic let-off in the production process of papermaking felt needs to detect the warp tension. It is ideal to keep the tension constant during the weaving process. In the actual production process, due to the many changes in the weaving process and fabric, the diameter of the warp beam supplying the warp As the supply of warp yarn gradually decreases, the warp yarn deformation cannot be predicted, so the tension control is a technical difficulty. Generally, rough control is adopted, and a large fluctuation range is allowed. However, rough control of the tension leads to a large tension error between the previous cycle and the subsequent cycle during the weaving process of the loom, which is manifested in the uneven gap between the weft y...

AI Technical Summary

Problems solved by technology

Roughly controlling the tension leads to a large tension error between the previous cycle and the following cycle during the weaving process of the loom, which is manifested in the uneven gap between the weft yarns on the cloth surface. If it is light, the cloth grade will be reduced, and if it is serious, the papermaking felt will become a waste product.

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