RU2608808C2 - Method of producing yarn with alternating twist - Google Patents

Abstract

FIELD: textile and paper.

SUBSTANCE: method can be used for production of yarn with alternating twist and ensures yarn quality with reduction of labor input, simplified design and servicing. Method involves alternating torsion of yarn with help of three identical reversive pneumatic reels, two of which are close to exhaust device, third is to receiving spool. At that, simultaneous twisting of two slivers is performed with same pressure of compressed air into two reels, close to exhaust device, and subsequent twisting of slivers in third connecting reel, approached to receiving reel. Rotation direction of air in all reels is constant and can be both clockwise and counter clockwise. Produced yarn has original structure.

EFFECT: method of alternating twist makes it possible to increase strength yarn obtained by reel method.

1 cl, 1 dwg

Description

The invention relates to the textile industry and relates to a method for producing alternating twist yarn.

Known methods for producing yarn of alternating twist in pneumofiber spinning [Spinning of bast and chemical fibers and the production of twisted products, Moscow: Light industry. 1980, pp. 244-246; A method of obtaining yarn of alternating twist. V.P. Khavkin, I.V. Horn, L.N. Ginzburg, N.L. Ginzburg, L.B. Karjakin. USSR Copyright Certificate RU 537140 A, publ. 11/30/76. Bull. No. 14; A method of obtaining yarn of alternating twist. V.P. Khavkin, I.V. Horn USSR Copyright Certificate RU 511395 A, publ. 04/25/76. Bull. No. 15]. However, these methods do not provide sufficient yarn strength (specific breaking load at the level of 7-10 cN / tex). Numerous studies of bobbin yarn found that lagging yarn from ring spinning machines are indicators of strength and tensile elongation. The main reason for the decrease in strength and elongation is the lack of actual twist.

A prototype of the invention is a known method for producing alternating twist yarn, according to which alternating twisting of the yarn is carried out [Patent 2207413 Russian Federation, IPC D02G 3/26. A method of producing yarn of alternating twist / G.A. Gogolinsky, P.A. Pisemsky, A.N. Filippyuk; patentee LLC "TMZ" Textile machinery and spare parts, decl. 12/03/2001; publ. 06/27/03, Bull. No. 1 4 p.: Ill.]. According to the method, the sliver coming out of the exhaust device passes through the first false twist reel, where it gets twisted clockwise, then through the second false twist reel, similar to the first reel, but turned upside down by 180 °, as a result of which the sliver receives additional counterclockwise twist arrows and in the form of yarn of alternating twist are wound on the take-up reel. The slipper between finches gets twist from two finches of the same direction, because the inverted second fin is similar to the first and the compressed air pressure in the fin is the same. The sliver receives an intense twist in one direction, quickly becomes saturated with twist and turns into yarn. The disadvantage of this method is the reduced strength of the finished yarn (specific breaking load at the level of 7-10 cN / tex).

An object of the invention is to provide a method for producing alternating torsion yarn, providing a technical result consisting in increasing the strength of the yarn.

This technical result is achieved in a method for producing alternating torsion yarn, according to which alternating yarn torsion is carried out, characterized in that the alternating yarn torsion is carried out using three identical non-reversible pneumatic reels, two of which are close to the exhaust device, the third one is connecting to the take-up reel.

In this case, the resulting yarn is 2-3 times stronger than when working with two reels, and the direction of air rotation in the reels does not affect the strength of the yarn. In this case, the strength of the yarn slightly depends on the pressure value of compressed air in the reels. The accumulated yarn has an original structure. The resulting yarn can consist of two different components: flax and combed flax, hemp and flax, combed flax and hemp and other combinations. Since the twisting of the slippers begins directly at the upper reels, creating a solid base, the breakage decreases when passing the lower connecting reel and when laying the turns and winding on a reel. The strength of the yarn in a wet form is higher than when working with two reels. When twisting two slippers from the upper reels, the yarn is less fleecy than when working with two reels. The resulting yarn is more even, without large thickenings and cones.

The invention is illustrated in the drawing. In FIG. 1 is a flow chart of a part of a spinning spinner that illustrates a method for producing alternating twist yarns. In FIG. 1 marked: sliver 1, exhaust device 2, the first pneumatic reel 3, the second pneumatic reel 4, the third pneumatic reel 5 and the take-up reel 6.

A method of producing yarn is as follows. On the machine’s power supply, two coils are installed with a roving of the same number for refueling under one exhaust roller.

Two slippers 1, coming out of the exhaust device 2, in parallel pass through the false twist reels 3 and 4, where each gets twisting, then through the connecting reel 5, similar to the reels 3 and 4, as a result of which the slippers are connected and the product receives additional twisting, and then in the form of an alternating twist yarn is wound on the take-up reel 6. In this case, the direction of rotation of the compressed air in the reels is constant and can be either clockwise or counterclockwise.

If in reels 3 and 4 the pressure of compressed air is the same, the air rotates in one direction, and in reel 5 the air rotates in the opposite direction, then the slippers between the reels get an intense twist of one direction, quickly saturated with a twist of one direction, which leads to their self-twisting in the connecting reel and yarn of the original structure.

If in reels 3 and 4 the pressure of compressed air in the reels is the same, the air rotates in one direction, and in reel 5 the air rotates in the same direction, then the slippers between the reels also get an intense twist of one direction, quickly saturated with a twist of one direction, which also leads to their twisting in the connecting reel, additional twisting and turning into the yarn of the original structure.

If in reels 3 and 4 the pressure of compressed air in the reels is the same, the air rotates in opposite directions, and in reel 5 the air rotates in the same direction with one of the upper reels side, then the slippers between the reels also receive an intensive twist in different directions, quickly saturated with a twist, then they are connected in a connecting reel, additionally twisted together and turned into yarn of the original structure.

In a short section from the lower reel to the take-up spool, yarn can also get an intense twist. Alternating torsion yarn is wound on the take-up reel, which prevails in this section depending on the speed of release.

The process of yarn formation is continuous and irregular, therefore, the yarn of the original structure, which has no analogues, is wound on the take-up reel.

This yarn has considerable strength and evenness in strength and has an increased demand in knitwear production, as it has less stiffness and is easier to bend around the headset of looping knitwear machines. The knitted fabric does not warp, and flat sections create a preferred effect in the finished knitted product.

Claims (1)

A method of producing yarn of alternating twist, which consists in alternating twisting of yarn, characterized in that the twisting of two slippers is performed simultaneously at the same pressure of compressed air in two reels close to the exhaust device, and the subsequent twisting of the slippers in the third connecting reel close to the take-up reel, with In this case, the direction of air rotation in all finches is constant and can be either clockwise or counterclockwise.

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