RU2119980C1 - Method for producing core-spun yarn and device for its embodiment - Google Patents

Abstract

FIELD: production of core-spun yarn. SUBSTANCE: to produce yarn with limited stretchability, i.e. easily stretching yarn up to preset limit without breakage of fibrous shell. Supplied to gap of weaving condensers rotating in the same direction are at least two core threads of different flexibility. More flexible thread is supplied at a speed lower than that of ready yarn output, and nonflexible thread is supplied at a speed close to that of yarn output. Core threads are reinforced with fivers which are fed over the entire width of gap formed by surfaces of weaving condensers. The device for embodiment of the claimed method has driving roller of core supply unit with section made on it for supply of flexible thread with diameter which is smaller than diameter of the other section for supply of nonflexible thread. Driving roller of output pair is kinematically connected with driving roller of supply unit for maintaining the speed of section surface for supply of nonflexible thread corresponding to speed of output rollers. EFFECT: higher efficiency. 2 cl, 1 dwg

Description

 The invention relates to the textile industry and can be used for the production of reinforced yarn.

 A known method of producing a combination yarn, in which an elastic thread is twisted with an inelastic thread, which during further processing of the yarn breaks up and does not affect the properties of the finished product (DE 1510665 B, 08.07.71).

 The disadvantage of this method is that it requires additional operations to achieve yarn elasticity.

 The closest analogue of the claimed method is a known method for producing reinforced yarn, which consists in feeding the fiber flow into the gap of rotating spinning capacitors while simultaneously feeding the core from the side opposite to the output coaxially feeding the core of the finished yarn (US 4321789 A, 03.30.82).

 There is also known a device for producing reinforced yarn, comprising spinning spinning capacitors rotating in one direction, a sampling unit, a channel for supplying ribbon fibers to the gap formed by the surfaces of the condensers, a core feed unit in this gap, exhaust rollers for removing the finished yarn and a drive mechanism for the core supply unit and exhaust rollers (US 4321789 A, 03.30.82).

 However, the tensile ability of the reinforced yarn obtained in this way is entirely determined by the property of the used core thread; thus, in the case of an inelastic core thread, the yarn does not have the property of elastic extensibility, and in the case of elastic, the yarn shell will break when the yarn is stretched to a length greater than that which the core thread was subjected to at the time of reinforcement. In addition, the unlimited elasticity of reinforced yarn creates difficulties in technological transitions with its further use.

 The objective of the group of inventions is to create a method and device for producing reinforced yarn, providing a technical result, which consists in obtaining yarn with the property of limited extensibility, that is, easily stretched to a predetermined limit without destroying the fibrous sheath.

 This technical result in a method for producing reinforced yarn, which consists in supplying a fiber flow to the gap of rotating spinning capacitors while simultaneously supplying the core from the side opposite to the output coaxially feeding the core of finished yarn, to the core reinforcing yarn, by supplying at least two core threads, one of which is elastic and the other is inelastic, while the elastic core is fed at a speed less than the rate of release of the finished yarn, and inelastic a new core thread is fed at a speed close to the rate of release.

 In a device for producing reinforced yarn containing spinning capacitors rotating in one direction, a sampling unit, a channel for supplying ribbon fibers to the gap formed by the surfaces of the capacitors, a core supply unit to this gap, exhaust rollers for removing the finished yarn and a drive mechanism for the core supply unit and exhaust rollers, the technical result is achieved by the fact that the core supply unit comprises a drive roller with sections of various diameters made along its width and several the faces made with the possibility of free rotation, while the section for supplying an elastic core thread is made with a smaller diameter than the section for supplying an inelastic core thread, with each section of the drive roller corresponding to one pressure roller, and the drive mechanism is configured to maintain the surface speed of the section for filing inelastic core thread, commensurate with the speed of the exhaust rollers.

 The invention is illustrated by the drawing, which shows a diagram of a device for producing reinforced yarn.

 A device for producing reinforced yarn comprises a core supply unit 1, in which sections 4 and 5 of a cylindrical shape are rigidly fixed to the roller 2, which is configured to force rotation from the drive mechanism 3, while the diameter of the section 4 for feeding the elastic thread from the package 6 is smaller, than the diameter of the portion 5 for feeding the inelastic thread from the package 7. The packages 6 and 7 are mounted on a frame (not shown). The pressure rollers 8 and 9 are made to rotate independently of one another, while the roller 8 in its cylindrical surface is in contact with section 4, and the roller 9, respectively, with section 5.

 Spinning capacitors 10 form a gap 11, in which the output section of the channel 12 is located, and its input section is connected to the sampling unit 13. The exhaust roller 14, having a line with the pressure roller 15, is made with the possibility of forced rotation from the drive mechanism 3.

 A method of obtaining a reinforced yarn is as follows.

 From the packaging 6, using the portion 4 of the roller 2 and the pressure roller 8, the elastic thread 16 is fed into the gap 11 from the packaging 6 at a lower speed than the speed of the inelastic thread 17, which is fed from the packaging 7 using the portion 5 and the pressure roller 9, which is achieved less the diameter of the section 4. As a result of the difference in speeds, the elastic thread 16 is fed into the gap 11 in the extended state, since the speed of the drive roller 14 of the exhaust pair of rollers 14 and 15 is kept at the same speed as the speed of the section 5 of the roller 2. Both threads 16 and 17 in the gap 11 reinforced with fibers that feed along the channel 12 from the tape 18 after its processing into the sampling unit 13. Due to the rotation of the condensers in one direction 10, the core threads 16 and 17 report a false twist, and in the area located up to the contact line of the exhaust rollers 13 and 14 (in the direction of the product) form a fibrous sheath with a real twist of fibers. The resulting reinforced yarn 19 with a pair of exhaust rollers 14 and 15 is continuously withdrawn from the gap 11 and wound on a bobbin (not shown).

 This method and device for its implementation allows to obtain reinforced yarn, the core threads of which do not have mutual twist and therefore do not affect each other's properties, but are fastened together by a fibrous sheath, the fibers of which are uniformly wound around them. Due to the lower value of the feed speed of the elastic core thread relative to the feed rate of the inelastic thread, the core is wrapped with fibers in the gap of the capacitors when the elastic thread is stretched by a certain amount. When removing the longitudinal load, the resulting reinforced yarn is compressed to stretch the elastic yarn. When removing the longitudinal load, the resulting reinforced yarn is compressed to the tensile value of the elastic thread, which was communicated to it at the time of fiber reinforcement carried out in the gap of the capacitors, and when repeated longitudinal impact has the ability to stretch to the same length.

 Further stretching of the reinforced yarn is prevented by an inelastic core thread, which ensures the integrity of the fibrous sheath, and is also a condition for the convenience of using the obtained yarn in the process of subsequent technological transitions, accompanied by longitudinal effects on the yarn.

Claims (2)

 1. The method of producing reinforced yarn, which consists in feeding the fiber stream into the gap of rotating spinning capacitors while simultaneously feeding the core from the side opposite to the output coaxially feeding the core of the finished yarn, characterized in that at least two core threads are fed into the core reinforcing zone , one of which is elastic and the other is inelastic, while the elastic core thread is fed at a rate lower than the rate of release of the finished yarn, and the inelastic core thread yut at a speed close to the rate of release.  2. A device for producing reinforced yarn containing spinning capacitors rotating in one direction, a sampling unit, a channel for feeding tape fibers into the gap formed by the surfaces of the capacitors, a core supply unit to this gap, exhaust rollers for removing the finished yarn and a drive mechanism for the core supply unit and exhaust rollers, characterized in that the core supply unit comprises a drive roller with sections of various diameters made along its width and several pressure rollers configured to free rotation, while the section for supplying an elastic core thread is made with a smaller diameter than the section for supplying an inelastic core thread, with each section of the drive roller having one pressure roller, and the drive mechanism is configured to maintain the surface speed of the section for supplying an inelastic core thread commensurate with the speed of the exhaust rollers.