Connection device for piezoelectric actuators of jacquard rods of knitting machines

Abstract

A connection device (4) for a piezoelectric actuator (3) of a jacquard bar for a loom, comprising: a support body (32); a plurality of interconnecting elements (34) inserted into the support body (32) and can be detachably connected to a corresponding plurality of interface electrical contacts (9) of a plurality of piezoelectric actuators (3); for the interconnection of the interconnection element (34) with the control device of the loom at least one interconnecting terminal (33); and at least one fixing portion (35) constructed and arranged to detachably mount the support body (32) to the support body (7) of the jacquard yarn guide rod (2) )superior.

Description

technical field [0001] The present invention relates to a piezoelectric actuator for looms, in particular jacquard rods for warp knitting machines such as warp looms, raschel machines, torico machines, crochet machines and similar series. Actuator connection device. The invention further relates to a warp knitting machine comprising the aforementioned device. Background technique [0002] As is known, linear warp knitting machines are provided with bars designed to carry a number of thread holding elements commonly called thread guides. This rod is moved to enable the correct feeding of the yarn associated with the thread guide to the needles of the needle bed of the knitting machine to form a new fabric. The yarn guide rod performs two basic movements: a linear movement in front and behind the hook of each needle, commonly called "traversing", and on the side of each needle, commonly called "rocking". Oscillation for the yarn to be positioned alternately in front of and ...

AI Technical Summary

Problems solved by technology

Resin removal is carried out at high temperature, which then involves the problem of disposing of the molten resin that should be removed accurately and above all causes frequent damage to the protection of small cables, which peels off parts of the copper conductors

It is therefore necessary to cut and re-solder each pin of the piezo sheet, or subsequently increase the area to be coated with resin, thus creating a difficult situation

Also, high temperature resin removal often involves damage to the brittle sheet walls on which the ceramic part forming the capacitor—the operating core of the piezoelectric sheet—is applied by deposition, so repaired modules are often no longer as reliable as needed

Therefore, the repair is so complex and uncertain that it is often not worth repairing the modules, and modules with only one faulty piezo and 15 active piezos are usually thrown away

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