Jacquard needle piece of warp knitting machine

Abstract

The invention discloses a jacquard needle piece of a warp knitting machine. The jacquard needle piece of the warp knitting machine comprises a jacquard needle bed and a plurality of piezoelectric ceramic needle selecting pieces. The jacquard needle bed comprises a base plate, a needle embedding block and a limiting block, and one piezoelectric ceramic needle selecting piece is embedded in each needle embedding groove in the needle embedding block and one corresponding limiting groove in the limiting block. Each piezoelectric ceramic needle selecting piece comprises a middle substrate, a yarn guide needle and piezoelectric ceramic pieces arranged on the two sides of the middle substrate, each middle substrate is a carbon fiber substrate made of conductive carbon fiber materials, the middle substrate of each piezoelectric ceramic needle selecting piece is electrically connected with the electrodes in the piezoelectric ceramic pieces arranged on the two sides of the middle substrate, the middle substrates of all the piezoelectric ceramic needle selecting pieces are integrally connected through first guide wires to be electrically connected with the negative electrode of a driving power source of the warp knitting machine, and the outer electrodes of the piezoelectric ceramic pieces on the two sides of each middle substrate are respectively and electrically connected with the positive electrode of the driving power of the warp knitting machine through second guide wires. The jacquard needle piece of the warp knitting machine is low in manufacturing cost, high in production efficiency, long in service life, and capable of avoiding the accidents of depoissonization, leakage current and short circuit of the piezoelectric ceramic pieces.

Description

technical field [0001] The invention relates to a knitting mechanism of a jacquard warp knitting machine, in particular to a jacquard needle block in the knitting mechanism of a jacquard warp knitting machine. Background technique [0002] The jacquard needle block is the key component of the jacquard warp knitting machine to realize the jacquard function. The existing jacquard needle block includes a jacquard needle base and several piezoelectric ceramic needle selectors; the jacquard needle base has a base plate, an inlay Block and limit block, the inlay block is provided with some inlay grooves arranged in parallel at a certain distance from each other, and the limit block is provided with some limit grooves arranged in parallel at a certain distance from each other, each of the inlay block A piezoceramic needle selector is embedded in a needle embedding groove and a corresponding limit groove on the limit block; each piezoelectric ceramic needle selector is mainly compos...

AI Technical Summary

Problems solved by technology

[0003] However, the jacquard needle block of this structure has the following disadvantages during use: on the one hand, the production cost of the jacquard needle block is increased due to the high price of silver glue; The insulating protective layer on the side of the ceramic sheet is relatively weak and easily damaged during assembly, so it is very easy to cause leakage or even short circuit on both sides of the piezoelectric ceramic sheet when dispensing silver glue, which affects the performance of the jacquard needle block; On the one hand, since the silver glue generally needs to be cured after a period of time at a high temperature of about 80°C, it will have a certain depolarization effect on the piezoelectric ceramic sheet, thus affecting the performance of the piezoelectric ceramic sheet

In addition, because the jacquard needle block produces a large dynamic load during work, and the strength of the glass fiber is low, it is prone to fatigue failure, thus shortening the service life of the jacquard needle block

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