RU143392U1 - FABRIC SUPPLY DEVICE FOR A MULTI-LAYERED FABRIC AND A WEAVING MACHINE WITH THIS DEVICE - Google Patents

Abstract

1. The feed device of the warp threads of the weaving machine for multilayer fabrics, comprising: at least two Navoi mounted on a stand rack with a drive, and for each Navoi along the feed warp threads installed means of tension of warp threads, a sensor for tensioning warp threads, and a compensator, characterized in that they are located one above the other along an arc concave in the direction of the warp feed. 2. The device according to claim 1, characterized in that it is equipped with a means for separating the warp threads into layers installed after the expansion joints and made in the form of a set of rollers. The device according to claim 1, characterized in that the drive of each navoi is made adjustable, allowing the warp threads to be released with the required length and tension, the tension sensor being connected by a feedback line to said adjustable drive. The device according to claim 1, characterized in that the compensator is made in the form of a pivot-lever device formed by a guide roller with a fixed axis of rotation fixed on one side of the compensator lever, and a compensating roller pivotally connected to the other side of the said lever, the compensator lever being resiliently mounted on the axis of the guide roller rotatably about this axis. 5. The device according to claim 2, characterized in that the navoi are located so that the axes of the navoi are located on an arc of a circle centered on the means for separating the warp threads into layers between the extreme rollers of the means for separating the warp threads. The device according to claim 3, characterized in that the adjustable drive is made in the form of a system that includes a servomotor connected through a gearbox to the Navoi, control unit, communication

Description

Technical field

The present utility model relates to textile machinery, namely, to devices of the main mechanisms of weaving machines designed to produce multilayer fabrics. In particular, the utility model relates to a mechanism for tempering and tensioning warp yarns fed into the weaving zone.

State of the art

Currently, there is a tendency for an increasing use of special fabrics and, in particular, multilayer fabrics. They have great strength, especially in the transverse direction, and are widely used for the production of technical fabrics and woven products for special purposes. Multilayer fabrics belong to fabrics with complex weaves, the structure of which imposes specific requirements on the production lines for their manufacture.

Known are the production lines of multilayer fabrics using both shuttle and shuttleless weaving machines, including a device for supplying warp threads to a fabric forming zone comprising a knot (section) of warp threads, a knot of tensioning warp threads, a knot for separating warp threads, a yaw formation unit, a surf knot for weft threads and knot of winding fabric.

Most often, in the production of multilayer fabrics, the warp knot is made in the form of a creel, see, for example, RF patent for utility model RU 21782 (U1), publ. 02/20/2002 or utility model of China CN 202440624 (U), publ. 09/19/2012. In these technical solutions, it is difficult to supply a large number of warp threads to the weaving zone with the same tension, which reduces the quality of the fabric produced. In addition, creel lines are difficult to maintain.

Known weaving machine for the manufacture of multilayer fabrics, for example, a weaving machine STBUTT, in which the feeder warp contains two navoi, see, Internet site http://www.tehmashholding.ru/produktsiya?start=44/, publ. 02/27/2013. The disadvantage of this technical solution is the limited range of produced technical fabrics by the structure and number of layers, since it is limited to the production of one and a half and two-layer fabrics.

For the production of fabrics with a large number of layers, the installation of a larger number of navoi is required. Known is a weaving machine for manufacturing multilayer fabrics, comprising a warp yarn feeder, a yawing unit, a weft yarn surf site and a fabric winding unit, in which the warp yarn feeder is made with four stitches, for example, a T.2N.4E / P 6000 weaving machine TRINCA, see Internet site http://www.trinca.it/en/metal.php, publ. 06/07/2013. The warp yarn feeder comprises a warp yarn assembly made in the form of a navoi station, including navoi and navvoy strut, each navoi equipped with an adjustable drive, a warp tension knot, including a tensioner, warp tension sensor and a compensator.

The disadvantage of this technical solution is the placement of navoi one after another, which leads to an increase in the production area occupied by one weaving machine. In addition, with such a placement of navoi, it is difficult to supply warp threads to the fabric formation zone with the same tension from all navoi, which reduces the quality of the fabric produced, from the point of view of ensuring its calculated technical indicators, due to the different conditions for the formation of a tissue element in different layers. The consequence of this is also the uneven operation of the navoi, which leads to an increase in the number of refuelings with a large amount of waste of warp threads.

Utility Model Disclosure

The objective of this utility model is to improve the quality of the produced multilayer fabric and reduce the dimensions of the weaving line. One of the ways to solve this problem is the technical improvement of the warp yarn feeder on a weaving machine, proposed in the proposed utility model, taking into account the formation of each layer from an individual material.

The technical result of this utility model is to ensure the supply of warp threads from navoi with the same tension and reduce the production area occupied by one weaving machine.

The specified technical result is achieved in that the device for feeding the warp threads of the weaving machine for the production of multilayer fabrics, contains at least two stitches installed on a stand with a drive, and for each stash there is a means for tensioning the warp threads, a tension sensor warp threads, and a compensator, while the coils are located one above the other along an arc concave in the direction of supply of the warp threads.

Preferably, the device is equipped with a means for separating warp into layers, installed after the expansion joints and made in the form of a set of rollers.

Preferably, the device is further provided with a means for separating the warp yarn into layers, which is installed after the expansion joints. In a preferred embodiment, the axes of the navoi are located on an arc of a circle with a center located on the means for separating the warp yarns between the extreme rollers of the means for separating the warp yarns.

To improve the conditions for supplying warp yarns to the shedding unit from each Navoi, the means for separating warp yarns in layers is made in the form of a set of rollers.

At the same time, the design of the means for separating the warp threads into layers is not limited to the execution using rollers, and can be built on the basis of any elements, both in shape and material of manufacture, ensuring the separation of filamentary materials into separate groups.

In a preferred embodiment of the warp yarn feeder, the drive of each staple is adjustable, allowing the warp yarns to be released with the required length and tension, using signals from the warp yarn tension sensor, which is connected to it by a feedback line.

An adjustable drive can be formed using both servo motors and stepper motors. In a preferred embodiment, the variable-speed drive is made in the form of a system including a servomotor connected through a gearbox to the naval and a control unit connected by a feedback line to the warp tension sensor.

In a preferred embodiment of the present utility model, the device uses a compensator made in the form of a pivot-lever device formed by a guide roller with a fixed axis of rotation fixed on one side of the compensator lever and a compensating roller pivotally connected to the other side of the said lever, the compensator lever resiliently mounted on the axis of the guide roller with the possibility of rotation relative to this axis. At the same time, other types of tension compensators can be used in the warp yarn feeder according to the present utility model, which in their design ensure alignment of the tension of the group of filamentous materials.

Another aspect of the present utility model is the creation of a weaving machine for the production of multilayer fabrics, comprising a device for supplying warp threads to the fabric formation zone, a shedding unit, a weft laying site, a weft surf unit and a commodity assembly in which at least one warp threading device at least two Navoi mounted on a stand with a drive, and for each Navoi provided along the supply of warp threads a means of tensioning warp threads, a sensor for tensioning warp threads And the compensator, and Navoi arranged one above the other.

In a preferred embodiment, the multilayer weaving machine comprises a warp yarn feeder that includes layers for separating warp yarns into layers, which is installed after the compensator, and the coils are located one above the other along an arc of a circle with a center located in the middle part on a means of separating warp into layers.

Brief Description of the Drawings

The warp feed device of the present utility model is illustrated by drawings, in which

FIG. 1 is a schematic diagram of a weaving machine with a thread feeding device according to the present utility model,

FIG. 2 is a plan view of a filling line diagram of a true utility model.

Utility Model Implementation

In FIG. 1 and 2 show a structural-filling pattern of a weaving machine for producing multilayer fabrics. In FIG. 2 is a top view of a construction-refueling scheme, in which, to simplify the drawing, only the extreme elements of the warp threads assembly and the roll of the warp threads tension assembly are shown.

The weaving machine comprises a warp yarn feeder 15, a shedding unit 5 (mechanism), a weft yarn laying unit (mechanism) (not shown), a weft yarn surfing unit 6 (mechanism), and a unit for a fabric winding mechanism 7.

The warp yarn feeder includes a warp yarn assembly 1, a warp yarn tension assembly 2 and a warp yarn separation unit 3.

The node 1 of the warp threads is formed from a bulkhead 8 for installing at least two navoi 9 with adjustable drives 17 (Fig. 2). On the stand, the navoi are located one on top of the other in an arc 10. The number of navoi in the stand is determined by the number of layers in the fabric and the number of cloths produced on the machine. The adjustable drive provides the release of warp threads of a given length in accordance with the measurement data of the tension of the warp threads.

In the area of the warp thread unit 1, before the stitches 9, the main thread tension unit 2 is placed 15. The warp thread tension unit includes a thread tensioning means 4 for each staple equipped with a warp tension sensor (not shown). In the present utility model, the warp thread tensioner is in the form of a lever compensator mechanism 4. The mechanism 4 of the lever compensator is made in the form of a pivot-lever device formed by a lever 13, one end of which is pivotally connected to the axis of the guide roller 12, and a roller 14 is pivotally mounted on the other end of the lever. The lever 13 is connected to an elastic element, for example, a spring 11. The lever is installed on the axis of the guide roller with the possibility of swinging around this axis, providing in the process of tissue development elastic interaction with the warp threads 15, covering the rollers 12 and 14.

To improve the conditions of yawning and the formation of a tissue element, the warp yarn feeder comprises a layering unit 3 for separating warp yarns. This node can be placed, for example, on the skeleton of a weaving machine and is made in the form of a set of rollers (price bars) installed with an offset along the warp threads. Relative to this node, geometric calculations of the placement of the navoi on the naval stand are determined, which ensures equal removal of the navoi axis from the warp separation unit in the coordinate system, the beginning of which is selected between the extreme separation rollers. In a preferred embodiment of the utility model, the axes of the navoi are placed along an arc of a circle, the center of which is in the middle of the knot for separating warp between the extreme rollers.

The warp yarn feeder, formed from the nodes described above, allows the warp yarns of each layer to be fed taking into account the physicomechanical properties of the warp material and the thickness of the warp yarns, which improves the quality of the fabric produced. Placing navoi one on top of the other makes it possible to reduce the size of the weaving machine in its depth and thereby reduce the occupied area. Due to the equidistance of the navoi, the consumption of warp threads from the navoi is evened out, which minimizes the amount of waste when refueling a weaving machine.

The adjustable drive 17 is made in the form of a system that includes a servomotor connected through a gearbox to the navoi axis, and a control unit connected by a feedback line to the warp tension sensor. In the process of fabric production, the tension sensor of the warp yarns supplied from the Navoi sends a signal to the warp release control unit.

The warp yarn feeder according to the present utility model can be performed for a pattern of placing navoi in several rows to produce multilayer technical fabrics with a large number of layers. For example, Fig. 2 shows a design-fueling scheme in which the navoi are located in two rows.

The process of tissue formation occurs with active control of the tension of the warp threads, released from each navoi, determined during the technical calculation of the fabric. After the formation of the multilayer fabric element and the removal of the finished fabric web and feeding the warp threads into the fabric forming zone by the node 7 of the commodity mechanism, the warp threads 15 are released from the navoi 9 with an adjustable drive 17. The amount of warp threads released is set by the adjustable drive control unit after comparing the specified tension and warp tension in the previous cycle, obtained through the feedback line of the tension sensor with the control unit. After passing through the mechanism 4 of the lever compensator, the warp yarns are fed to the knot separation unit 3 and then to the area of the pharynx knot 5 with the subsequent formation of the fabric element by the batan mechanism of the weft surf surfing knot 6.

The warp yarn feeder according to the present utility model, by ensuring equal operation of the navoi, can also reduce the mass of navoi by winding onto it the threads of the material required for a given layer of fabric, corresponding to the length corresponding to the length of a commercial piece of fabric, usually not more than 100 m long.

Claims (7)

1. The feed device of the warp threads of the weaving machine for multilayer fabrics, containing: at least two Navoi mounted on a stand with a drive, and for each Navoi along the supply of warp threads installed warp tensioner, warp tension sensor, and compensator, characterized in that the coils are located one above the other in an arc concave in the direction of supply of the warp threads. 2. The device according to claim 1, characterized in that which is equipped with a means of separating the warp threads into layers installed after the expansion joints and made in the form of a set of rollers. 3. The device according to claim 1, characterized in that the drive of each Navoi is made adjustable, allowing the warp threads to be released with the required length and tension, the tension sensor being connected by a feedback line to said adjustable drive. 4. The device according to claim 1, characterized in that the compensator is made in the form of a pivot-lever device formed by a guide roller with a fixed axis of rotation fixed on one side of the compensator lever and a compensating roller pivotally connected to the other side of the said lever, and the compensator lever is resiliently mounted on the axis of the guide roller with the possibility of rotation relative to this axis. 5. The device according to claim 2, characterized in that the coils are located so that the axes of the coils are located on an arc of a circle centered on the means for separating the warp threads into layers between the extreme rollers of the tool separation of warp threads. 6. The device according to claim 3, characterized in that the adjustable drive is made in the form of a system including a servomotor connected through a gearbox to the naval, and a control unit connected by a feedback line to the warp tension sensor. 7. A weaving machine for multilayer fabrics, comprising a device for supplying warp threads to the fabric forming zone, a shedding unit, a weft laying site, a weft weaving surf unit and a commodity mechanism unit, characterized in that the warp yarn feeder is made according to claim 1.