SU100238A1 - The method of pneumatic laying of the weft yarn in the throat of the base and shuttleless loom for its implementation - Google Patents

Description

The subject of the invention is a method of pneumatic laying of a weft yarn in the base throat from two sides on an shuttleless loom with the preliminary formation of a loop of weft yarn.

Prev; The agaim method, by comparison with known analogous methods, allows, by holding the weft yarn in a more straightened tensioned state, to prevent the occurrence of loops in the fabric.

The peculiarity of the method is that the end of the weft thread is first sucked in a loop into the pneumatic nozzle, then it is ejected from the nozzle into the base of the concentrated air flow additionally created in the throat of the warp that enhances the air from the nozzle and then sucked into another nozzle opposite edges of fabric and keep in it a thread until a pharynx closes.

D, the implementation of this method is provided with a shuttleless loom equipped with main and additional pneumatic nozzles and a drum which has a grip and weft reel.

The design feature of the machine lies in the fact that in it additional nozzles that create a concentrated air flow in the throat of the base are mounted on the batan’s vertical before the bird, with the possibility of their entry into the rim of the ri, epxv base between the warp threads and made in the form of tubular brackets with jammed ends. provided with concentrically arranged holes in the vertical plane.

The additional sonls are mounted in pairs and, with their openings, face the main nozzles in alternate order through one nozzle.

The main nozzles are made in the direction of movement of the weft yarn by means of a lever mechanism and work in conjunction with additional nozzles from alternately activated air pumps.

The weft thread release device is designed as an interacting yoke with a yoke and a lever fixed on the drum, controlled by a cam mounted fixedly inside the drum coaxially with it.

FIG. Figure 1 shows the pneumatic diagram of the machine; in fig. 2 is a section along AA in FIG. one; in fig. 3 - a general view of the additional nozzle; “And FIG. 4 is a diagram of the direction of air movement from the additional nozzles when laying the weft yarn to the left edge of the fabric; in fig. 5 is a diagram of the direction of air movement from the additional nozzles when laying the weft yarn to the right edge of the fabric; in fig. 6 is a diagram of a lever mechanism for driving the main nozzles; in fig. 7 - obdiy view from the end of the drum, winding the weft thread from the reel; in fig. 8 is a flow chart of the processes of laying the weft yarn in the main throat.

The air tubes 1 2 are mounted on the top of the third baton. One ends of these tubes are connected to alternately activated air pumps (diaphragm plugs) and 5, and the other ends are plugged. The pumps are driven by eccentrics of the drive mechanism.

The pneumatic scheme of the machine includes side tubes 6 and 7, which are connected at the same ends with air pumps 8 and 9; the other ends of these tubes carry the main nozzles 10 and //. S p p pumps do not have valves and are driven by the above eccentrics.

The air supply tubes / and .2 are provided with additional nozzles 12 and 13, which are hollow tubular brackets 14 with plugged ends. Staples 14 have holes that are concentric in the vertical plane and directed at an angle to the smallpox of the staples.

Additional nozzles 12 and 13 are installed in pairs in alternating order through one nozzle, with the holes of the brackets of nozzles 12 facing the left edge of the weaver, and the holes of the nozzle 13 towards the right edge of the fabric.

The drum 15, discontinuously winding the weft thread from the fixed reel, is provided with a hook-hook 16 of the weft thread. Inside the drum, the cam 17 fixedly fixed to it, controls the lever 18 fixed on the drum housing and discharges the weft thread from the gripper 16.

The attachment 19 prevents excessive winding of the yarn from the fixed reel 20.

Moving the nozzles 10 and 11 in the direction of movement of the weft yarn and partly entering them into the shed of the warp is carried out by a lever / knuckle mechanism having forcibly-swinging levers 21 and 22 pivotally connected through a system of intermediate levers with holders 23 and 24, on which Air supply tubes mounted 6 W.7.

When the batana moves from lowering the tissue, tubes 1 and 2 with nozzles 12 and 13 move together with the bat 3 of the bat and enter from above into the shed of the base between its threads (Fig. 2).

The air supply tubes 6 R 7 also move with the batane, and the nozzles 10 and // are constantly in line with the central axis of the brackets of the additional nozzles 12 and 13.

During the operation of the machine, the pumps 5 and 5, as well as the pumps and 5, work synchronously and alternately switch on forcing and suction of air. So, for example, when air is thrown out through the nozzle 10 by the pump 8, the pump 5 simultaneously supplies air to the nozzles 12, and air is sucked in the tube 7. Thus, a concentrated airflow is created inside the base of the shed in the direction indicated by the arrows in FIG. . During the subsequent rotation of the crankshaft of the machine, a raised flow is created in the opposite direction. The air flow from the main sonnels is enhanced by the air flow from the additional nozzles.

When the drum 15 is rotated, the hook-hook 16 picks up the thread previously clamped in the clamp 25 (Fig. 8, polishing /) and pulled out. em it around the perimeter of the drum loop (position //).

The thread is reeled off the reel through the tensioner 19.

At the approach of the nozzle 10, the thread is removed from the clip and sucked into the inner tube 6; at the same time, the loop is released from the catch 16 by the lever 18.

The end of the thread is completely sucked inside the tube 6 (position ///). After this, the thread is laid (position / V). The next weft is laid on the opposite side of the other fabric edge (position V).

The thread blank is held by gripping 6 between the edge of the fabric and the clip 25 (position V /). At the approach of the nozzle 10, the thread is cut and its free end is sucked into the tube 6, the loop is released at the same time and the other end of the thread is fixed in the clip 25, after which the thread is laid through the orifice of the warp (position VII).

Since the thread is laid in the hem edge, the hemming is carried out without a hemming mechanism.

When the batana moves to the lower part of the fabric, the weft thread, retained by the warp threads, is withdrawn from the tubular brackets of the additional nozzles, remains in the throat of the warp and is nailed.

Subject invention

Claims (5)

1. A method of pneumatically laying a weft yarn in the throat of a base from two sides on an shuttleless weaving pack with a preliminary formation of a loop from the weft yarn, which is different from the fact that, in order to prevent the occurrence of loops in the fabric by keeping the weft yarn in a more straightened and tensioned state until the opening of the throat, the end of the weft yarn is first sucked in a loop into the pneumatic nozzle, then, with a backward flow of air from this nozzle, it is thrown into the concentrated air flow created additionally in the throat , Usnlivayun: s air flow from the nozzle, whereupon the nozzle is sucked into the other at the opposite edge of the fabric and hold therein until the closure thread shed. 2. The wheelless weaving machine for carrying out the method according to claim 1, comprising an ocHOBHbie and additional pneumatic nozzles and provided with a discontinuously weaving weft thread from a reel with a reel having a catch and a weft thread diverter, characterized in that the additional nozzles creating a concentrated air flow in the base pharynx mounted on the bathead forehead in front of the reed with the possibility of their entry into the base of the main shed between the warp threads and are made in the form of tubular brackets with plugged ends fitted concentrically located and vertical apertures. 3. The form of the machine according to claim 2, so that the additional nozzles are installed in pairs and turned with their holes to the main nozzles in alternate order through one nozzle. 4. The form of the machine according to paragraphs. 2 and 3, characterized in that the main nozzles are made movable in the direction of movement of the weft yarn by means of a lever mechanism, partly included in the base of the base when the batane departs and working in conjunction with additional nozzles from alternately activated air pumps. 5. The form of execution of the machine according to claim 2, characterized in that the chopper of the weft thread is made in the form of a lever interacting with the capture of the thread and secured on the drum, controlled by a cam mounted fixedly inside the coaxially in the drum. 2 ten