CS251296B1 - Yarn slitting device by means of untwisting - Google Patents

Abstract

Twisting device for yarn splitting especially when operating textile machines, in particular rotor spinning machines the yarn break end is adjusted to showed a gradual decrease in fiber cross-section, This is achieved by using the "positional" method adjustable sleeves, fixed in fixed position the jaws between which the ends are formed a wedge joint for clamping the non-guided yarn and where the stationary jaws are rounded at the edges with a radius of 0.05 to 0.15 mm.

Description

(54) Twisting device for yarn splitting

Twisting apparatus, in particular for the operation of textile machines, in particular rotor spinning machines, by means of which the end of the yarn breakage is adjusted to exhibit a gradual fiber loss in cross-section, which is achieved by using a " positionally adjustable sleeve fastening the stationary jaws. a wedge gap is formed to grip the unmanaged yarn and wherein the fixed jaws at the edges are rounded with a radius of 0.05 to 0.15 mm.

Fig. 3

An object of the present invention is to twist the yarn cutting device.

In the case of textile machines, there is an effort to simplify the handling during the necessary operation, especially in machines with high production. The break-through on rotor spinning machines is particularly important in order not to reduce the use of these machines. In addition to the operator's own practice, the adjusted length of the yarn for re-spinning and the shape or characterization of the yarn end itself are also important for the successful repair of the break at first attempt.

The yarn is guided from the spooling device from the spool through the semiautomatic spinning device known as the spinning lever to the cutting device located on the spinning unit. Its position directly determines the length of yarn needed to separate as needed for a good spinning.

In existing machines, a device with a fixed blade mounted in a sleeve or holder serves to separate the yarn. The yarn end measured and separated on such a spinning device has an unnatural shape because it is terminated abruptly, without gradual weakening. In such a case, the front of the yarn is very noticeable and has a low strength.

The disadvantages of the described device are essentially eliminated by the present invention, where the present embodiment is replaced by a simple device with high reliability and, moreover, in terms of production and assembly, is not demanding.

The principle of the invention consists in that the fixed jaws fixed in the adjustable sleeve are adapted to form a wedge gap in which the fixed jaws are rounded at the edges. It is advantageous to use the fact that the wedge gap can be formed by identical jaws which are rotated and fixedly connected to each other. Another advantage is that rounding the edges of the functional jaws removes the wear of an important element, the sharp edge. ·

The advantages and features are summarized in the following description and apparent from the drawing, wherein FIG. 1 shows the yarn clamped device, FIG. 2 illustrates the location of the yarn splitting device on the spinning unit, and FIG.

In the exemplary embodiment, the jaws 2 and 2 are identical in shape and are rigidly connected and housed in the sleeve 3. 2 when separating the end needed for piecing. The edges of the stationary jaws 1, 2 are rounded with a radius of 0.05-0.15 m in the area of this wedge joint ±. a spinning device (not shown). The optimum yarn length g required for re-spinning the spinning unit g is determined according to the spinning technology conditions. The ends of the jaws 2 and 2 are with a large radial rounding gj g'for easy manual insertion of the yarn into the wedge joint 2 · • The machine is used as follows:

The operator grips the free end 6 of the yarn 6 near the jaws 2, 2. The yarn introduced from the piecing device (not shown) is introduced into the cannula gap 2 between the jaws 2 by the gradual pulling of the end 6 of the yarn 2 by the shawl, which depends on the fineness and material of the yarn 2. Subsequently, the operator turns the yarn end 6 between the fingers in the opposite twist direction of the produced yarn and detaches the yarn end 6 by moving it apart.

The resulting yarn end 2, which serves to restore the spinning process, has a characteristic gradual fiber loss in cross-section. This form of yarn end 2 is natural and advantageous for bonding yarns (not shown) to the rotor collecting surface. The spin from the end 2 so treated only slightly disrupts the appearance of the yarn 4 ^and my greater strength in comparison with a joint in which the end of the yarn 6 has been severed across the edge of the blade.

Claims (2)

SUBJECT OF THE INVENTION A device for twisting the yarn, in particular when operating textile machines, in particular rotor spinning machines, consisting of two wedge-shaped fixed jaws arranged in a positionably adjustable sleeve, characterized in that the edges of the stationary jaws (1,2) are at least in the wedge gap area. (4) rounded with a radius of 0.05 to 0.15 mm. Device according to claim 1, characterized in that the stationary jaws (1, 2) are identical in shape and rotated 180 ° to each other and are rigidly connected.