Procede de commande du mouvement des cadres de lisses d'un metier a tisser tapis double piece

Abstract

The invention relates to a method for controlling motion of heald frames (1 to 12) of double-carpet braiding machine (20), wherein the heald frames bear pad warp yarn (24) or knob warp yarn (26), the braiding machine comprises at least two weft yarn inserting stages for forming at least two textiles (N1, N2). For at least one pick, the method includes that relative to rated race parameter, at least one race parameter related to the pick is adjusted for at least one heald frame, every yarn bore by the heald frames is positioned at upper position of an upper weft yarn inserting passage (T1) of the braiding machine (20) by the heald frames or positioned at lower position of a lower weft yarn inserting passage (T2) of the braiding machine (20) by the heald frames. Adjustment and optimum selection for the race parameter employs way that direction of resultant force on at least one textile (N1, N2) acted by pile warp yarn and the all pad warp yarn and knob warp yarn is opposite to direction of vertical component (R1, R2) of resultant force on other textile (N1, N2) acted by the pile warp yarn and the all pad warp yarn and knob warp yarn.

Description

Technical field [0001] The present invention relates to a method for controlling the movement of a heald frame of a double carpet weaving machine. The heald frame is supported with pad warp yarns or binding warp yarns, and the double carpet weaving machine has at least two weft insertion stages, Used to form at least two fabrics. The invention also relates to a double carpet weaving machine having at least two stages of weft insertion for forming at least two fabrics. Background technique [0002] In the context of the present invention, a double carpet weaving machine is a loom that forms at least two fabrics, weaves these fabrics at the same time, and the pile yarns are interwoven with the two fabrics and move from one fabric to another fabric through The pile yarns are cut along the midplane of the fabric to separate the fabrics from each other. [0003] It is well known that in double carpet weaving, each fabric is subjected to a force that brings it closer to the other fabri...

AI Technical Summary

Problems solved by technology

However, the presence of the lancet prevents the entry of the warp yarns, or its ability to adjust the pile height or replace damaged warp yarns is questionable

Moreover, since each lancet located between two reed teeth of the reed occupies a certain space, the presence of the lancets limits the density of the resulting carpet in the weft direction, and also limits the warp yarns that can be woven. diameter of

Finally, the lancet exerts friction on both the yarn and the reed, which will wear them out prematurely

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