RU2085632C1 - Shaped thread production method - Google Patents

Abstract

FIELD: textile industry. SUBSTANCE: method involves drawing fibrous material between feeding and drawing pairs of rolls at drawing rate of 1.02-1.05; separating fibre bundles by separating rolls rotating at constant speed and feeding separated fibre bundles into pneumatic chamber; putting fibre bundles onto core thread movable through pneumatic chamber at constant speed providing linear density of portions simulating fibrous effects and formed on core thread from fibre bundles, with linear density of portions simulating fibrous effects making 1.5-3.0 of linear density of core thread. During formation of portions simulating fibrous effects on core thread, shape of each or selected portion simulating fibrous effect is changed by varying speed of feeding and drawing roll pairs during formation of related fibre bundle. Core thread with fibre bundles is directed through axial channel of hollow spindle and portions simulating fibrous effects are fixed on core thread by winding filament around these portions. Produced shaped thread is discharged from spindle and wound onto bobbin. EFFECT: increased efficiency, simplified method and improved quality and appearance of thread. 3 cl, 4 dwg

Description

 The invention relates to the textile industry and relates to a method for producing a shaped thread.

 A known method of producing a shaped thread, according to which the fibrous product is pre-stretched between the supply and exhaust pairs with an extract equal to 1.02 1.05, bundles of fibers are separated from it by spinning rollers rotating at a constant speed, they are fed into the pneumatic chamber, bundles are applied to it fibers to the core thread, moved through the pneumatic chamber at a speed that provides a linear density of fibrous effects formed on it from bundles of fibers, comprising 1.5 - 3.0 linear density of the core They carry out the core thread with bundles of fibers through the axial channel of the hollow spindle with the fibrous effects fixed thereon with a wrapping thread, the formed shaped thread is removed from the spindle and wound around the forging.

 This method involves changing only the diameter of the fibrous effect by changing the speed of movement of the core thread, which leads to a decrease in the quality of the shaped thread due to the unevenness of its twist and the limited range of shaped threads.

 The objective of the invention is to provide a method for producing a shaped thread, providing a technical result, which consists in expanding the assortment of shaped threads while providing the calculated optimal twist.

 This technical result in a method for producing a shaped thread, according to which a fibrous product is pre-stretched between the supply and exhaust pairs with an exhaust equal to 1.02 1.05, bundles of fibers are separated from it by spinning rollers rotating at a constant speed, they are fed into a pneumatic chamber, applied in it, bundles of fibers on a core thread, moved through a pneumatic chamber with a speed that provides a linear density of fibrous effects formed on it from bundles of fibers, which is 1.5 to 3.0 linear the core thread, conduct the core thread with bundles of fibers through the axial channel of the hollow spindle with the fibrous effects fixed on it with a twisting thread, remove the formed shaped thread from the spindle and wind it onto the package, this is achieved by moving the core thread through the pneumatic chamber at a constant speed, and when fibrous effects are formed on the core thread, the shape of each or individual fibrous effects is changed by changing the speed of the supply and exhaust pairs during the formation existing fiber bundle.

 When fiber effects are formed on the core thread, the duration of the fiber bundle supply to the pneumatic chamber is changed.

 Bundles of fibers are fed into a pneumatic chamber with a variable duration of pauses between adjacent baffles of fiber bundles.

 In FIG. 1 shows a diagram of a device for implementing the method; in FIG. 2 arrangement of fibrous effects of different linear density on the core thread; in FIG. 3 forms of fibrous effects located on the core thread; in FIG. 4 arrangement of shaped effects on a core thread of various lengths.

 According to the method (Fig. 1), the fibrous product, for example, in the form of rovings 1 is fed into the feed pair 2 of the exhaust device, it is pulled in the area between the feed 2 and the exhaust two-strap 3 pair with an exhaust equal to 1.02 1.05, and periodically fed strap pair 3 to a pair of separation rollers 4, rotating with a constant frequency. The feed 2 and strap 3 pairs of the exhaust device are driven by a separate microprocessor-controlled electric drive, which allows changing the rotation angles of these pairs according to the functional dependence and thereby pull and divide the roving into separate fiber bundles, which are fed into the pneumatic chamber 5 installed in close proximity from a pair of dividing rollers 4. Through the pneumatic chamber 4 with constant speed move the core thread 6 under tension, excluding the spread of torsion of the core filaments into the zone of the pneumatic chamber communicated by the core filament with a wrapping filament 7, descending from the package 9 rotating together with the hollow spindle 8.

 In the pneumatic chamber 5, under the influence of air flow, the front ends of the bundle fibers are fixed to the core thread 6, and after it is released, together with the bundle, they are sent to the axial channel of the spindle 8 and wrapped with a thread 7. The formed shaped thread 10 is removed from the spindle and wound onto a package eleven.

 To improve the quality of the shaped thread, the speed of movement of the core thread through the pneumatic chamber is set constant in accordance with the calculated optimal twist of the shaped thread.

To expand the assortment of shaped threads, the speed of the feed and strap pairs is changed according to the functional dependence to obtain fibrous effects of various linear density T _eff in the range of 1.5 to 3.0 linear density of the core thread T _article

 In FIG. Figure 2 shows the location of the fibrous effects of different linear densities on the core thread.

 An additional extension of the assortment of shaped threads is obtained by changing the shape of the fibrous effects. This is achieved by functional control of the feed and strap pairs speed during the formation of each fibrous effect. Various forms of fibrous effects located on the core thread are shown in FIG. 3. So, for example, if the speed of the supply and strap pairs is decreasing, then the shape of the fibrous effect will correspond to position 12, if increasing, then position 13, if changing according to any functional law, for example, according to a sinusoidal one, then position 14.

The length of the fibrous effects L _eff on the core thread is easily adjustable in a wide range due to the duration of rotation of the feed and strap pairs, which varies in functional dependence. In FIG. Figure 4 shows the arrangement of fibrous effects of various lengths on the core thread.

The pause between adjacent periods of rotation of the supply and strap pairs t _p (Fig. 4) determines the period when fiber is not supplied to the pneumatic chamber, and then the fibrous effect on the core thread is not formed. The pause is changed according to the functional dependence in accordance with the necessary intervals between fibrous effects.

 The decoration of the fabric or knitwear will be the most diverse if all the above parameters of fibrous effects on the shaped thread (linear density, shape, length, spacing) will change simultaneously according to the functional dependence.

Claims (3)

 1. A method for producing a shaped thread, according to which the fibrous product is pre-stretched between the supply and exhaust pairs with an exhaust equal to 1.02 1.05, bundles of fibers are separated from it by spinning rollers rotating at a constant speed, they are fed into the pneumatic chamber, applied therein bundles of fibers on a core thread, moved through a pneumatic chamber with a speed that provides a linear density of fibrous effects formed on it from fiber bundles, comprising 1.5-3.0 linear density of a core thread, wire a core thread with fiber bundles is put through the axial channel of the hollow spindle with the fibrous effects fixed to it with a wrapping thread, the formed shaped thread is removed from the spindle and wound onto a package, characterized in that the core thread is moved through the pneumatic chamber at a constant speed, and when forming on the core filaments of fibrous effects change the shape of each or individual fibrous effects by changing the speed of the supply and exhaust pairs during the formation of the corresponding fiber bundle.  2. The method according to claim 1, characterized in that when the formation of fibrous effects on the core thread, the duration of the filing of the fiber bundle into the pneumatic chamber is changed.  3. The method according to p. 1 or 2, characterized in that the fiber bundles are fed into a pneumatic chamber with a variable duration of pauses between adjacent periods of supply of fiber bundles.

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