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CN-121976334-A - Drawing method and device for an air spinning machine with multiple feeders

CN121976334ACN 121976334 ACN121976334 ACN 121976334ACN-121976334-A

Abstract

A drawing method and apparatus for an air spinning machine with a plurality of feeders, the method comprising the steps of preparing at least two textile fibre webs to be fed by means of at least a respective first and second guide element upstream of an air spinning device, drawing said webs separated from each other with a plurality of pairs of drawing rollers, each pair of said drawing rollers comprising a driving roller and a guide roller, said drawing rollers being adapted to perform a progressive drawing of each said web intercepted simultaneously by said drawing rollers, feeding said drawn webs separated from each other to a spinning chamber of said air spinning device to obtain the desired hybrid yarn. The invention allows to use a net of the same yarn count and to directly adjust its degree of draw on the spinning machine, obtaining a final yarn with a final predetermined yarn count and any mixing percentage required.

Inventors

  • FABIO DAGNOLO
  • Luca Deoto
  • Carlo Judic

Assignees

  • 塞维欧纺织机械股份公司

Dates

Publication Date
20260505
Application Date
20171027
Priority Date
20161028

Claims (11)

  1. 1. A method of drawing and spinning for an air spinning machine having a plurality of feeders, the method comprising the steps of: At least two textile webs (N1, N2) to be fed are produced at least by means of a respective first (8) and second (12) guide element upstream of the air spinning device (16), -Drawing the textile fibre webs (N1, N2) separated from each other with a plurality of pairs of drawing rollers (28), each pair of drawing rollers comprising a driving roller (32) and a guiding roller (36), the drawing rollers (28) being adapted to perform a progressive drawing of each of the textile fibre webs (N1, N2) intercepted simultaneously by the drawing rollers, Mechanically separating at least one of said drive rolls (32) of the pair of mutually facing pulling rolls (28) so as to have a first separating drive roll (40) intercepting a first web (N1) of said textile fibre webs and a second separating drive roll (44) intercepting a second web (N2) of said textile fibre webs, Rotating the first and second separator drive rollers (40, 44) at different rotational speeds to obtain different degrees of traction of the first and second webs (N1, N2) captured by the first and second separator drive rollers, Wherein the guide roller (36) facing the first and second separating drive rollers (40, 44) is in turn divided into two guide rollers (37, 38) so as not to tear or pinch one of the first and second webs (N1, N2), Feeding the drawn and separated textile webs (N1, N2) to a spinning chamber (20) of the air spinning device (4) to mix the textile webs in the spinning chamber (20) Air jets on the textile fibre web (N1, N2) are directed inside the spinning chamber (20) in a direction substantially tangential to the textile fibre web, so as to weave the textile fibre web (N1, N2) together and obtain a single yarn (F) output from the spinning chamber (20).
  2. 2. A drawing and spinning method for an air spinning machine with multiple feeders according to claim 1, characterized in that the textile fibre webs (N1, N2) are identical to each other.
  3. 3. A drawing and spinning method for an air spinning machine with multiple feeders according to claim 1, characterized in that the textile fibre webs (N1, N2) differ from each other in terms of quality, colour, yarn count and/or material.
  4. 4. A drawing and spinning method for an air spinning machine with multiple feeders according to claim 1,2 or 3, characterized in that it comprises the steps of: the degree of drawing of the textile webs (N1, N2) is adjusted during transfer by the pair of drawing rollers (28) in order to feed textile webs which differ from one another and have different degrees of drawing to the spinning chamber (20).
  5. 5. A drawing and spinning method for an air spinning machine with multiple feeders according to claim 1, 2 or 3, characterized in that it comprises the step of drawing the textile web (N1, N2) with the same drawing.
  6. 6. Method for drawing and spinning an air spinning machine with multiple feeders according to any of the preceding claims, characterized in that it comprises the following steps: At least two drive rollers (40, 44) of two different pairs of said pulling rollers (28) are mechanically separated into a first separation drive roller, a second separation drive roller, and a third and a fourth separation drive roller, respectively, so as to operate said first, second, third and fourth separation drive rollers at different rotational speeds to obtain different degrees of pulling of said textile web (N1, N2) intercepted by said first, second, third and fourth separation drive rollers.
  7. 7. A drawing and spinning method for an air spinning machine with a plurality of feeders according to any one of the preceding claims, characterized in that the textile fibre web (N1, N2) is fed in a longitudinal feeding direction (L), the first and second guide elements (8, 12) being juxtaposed in a transverse direction (Z) perpendicular to the longitudinal feeding direction (L), the separate driving rollers (32) being aligned with each other parallel to the transverse direction (Z) and rotating about a transverse rotation axis parallel to the transverse direction (Z).
  8. 8. Method for drawing and spinning an air spinning machine with multiple feeders according to any of the preceding claims, characterized in that it comprises the following steps: starting from at least two different textile fibre webs (N1, N2), the final yarn count and the desired mixing percentage of the yarn obtained after spinning are determined, Determining the individual starting yarn counts of the textile webs (N1, N2), the starting yarn counts being the same for both textile webs, -Differentiating the degree of drawing of the two textile webs (N1, N2) from each other, -applying different speed adjustments to the drawing rolls (28) acting independently on the individual textile webs (N1, N2) to obtain, after mixing the textile webs (N1, N2) in the spinning chamber (20), a yarn (F) having a final predetermined yarn count and a desired mixing percentage.
  9. 9. A drawing and air spinning apparatus for an air spinning machine having a plurality of feeders, the drawing and air spinning apparatus comprising: At least a first guide element (8) and a second guide element (12) independent of each other, so as to be able to feed at least two separate textile webs (N1, N2) simultaneously, An air spinning device (16) adapted to spin said textile web and comprising a spinning chamber (20), -A pulling device (24) placed between the first and second guide elements (8, 12) and the air spinning device (16), the pulling device (16) comprising a plurality of pairs of pulling rolls (28), each pair of pulling rolls comprising a driving roll (32) and a guiding roll (36), the pulling rolls (28) being adapted to perform a progressive pulling of each of the textile webs intercepted simultaneously by the pulling rolls, At least one drive roller (32) of the pair of pulling rollers (28) being mechanically divided into a first drive roller (40) intercepting a first web (N1) and a second drive roller (44) intercepting a second web (N2), The first drive roller (40) and the second drive roller (44) are operatively connected to separate drive means so that the first drive roller and the second drive roller can operate at different rotational speeds to perform different degrees of traction of the two textile webs (N1, N2) intercepted by the first drive roller (40) and the second drive roller (44), Wherein the guide roller (36) facing the first drive roller (40) and the second drive roller (44) is in turn divided into two guide rollers (37, 38) so as not to tear or squeeze one of the two textile webs (N1, N2), Wherein the spinning chamber (20) comprises a plurality of air nozzles oriented in a direction substantially tangential to the textile web fed in the spinning chamber (20) so as to weave the textile web (N1, N2) and obtain a single yarn (F) fed out from the spinning chamber (20).
  10. 10. The drawing and air spinning apparatus for an air spinning machine with multiple feeders according to claim 9, characterized in that the first driving roller (40) and the second driving roller (44) are arranged facing the output of the first guide element (8) and the second guide element (12).
  11. 11. A drawing and air spinning apparatus for an air spinning machine with multiple feeders according to any one of claims 9 to 10, characterized in that the textile fibre web (N1, N2) is fed in a longitudinal feeding direction (L), the first and second guide elements (8, 12) being juxtaposed in a transverse direction (Z) perpendicular to the longitudinal feeding direction (L), the separate drive rollers (32) being aligned with each other parallel to the transverse direction (Z) and rotating about a transverse rotation axis parallel to the transverse direction (Z).

Description

Drawing method and device for an air spinning machine with multiple feeders The present application is a divisional application of the application patent application with the application number 201711025414.X, the application number 2017, 10, 27, and the name of "a drawing method and apparatus for an air spinning machine with multiple feeders". Technical Field The present invention relates to a method and apparatus for drawing an air spinning machine (e.g., a jet air spinning machine) having a plurality of feeders. Background It is known to produce yarn from a single web by air jet spinning equipment. A particular field of development of the invention is yarns obtained from a plurality of fibrous webs, which yarns may be of different materials of different colours (mixtures) or of different qualities, or may even be of the same material. The multiple fed webs must be properly pulled and mixed to produce a yarn having the desired characteristics. Heretofore, there have been two possible processes for obtaining webs of different colors or materials. The first involves weighing raw materials, e.g., 50% cotton and 50% polyester, in the desired percentage ratio, and then introducing the web into a standard production cycle. The second involves preparing a plurality (typically 6 or 8) of webs and having the appropriate yarn count, and then repeatedly processing on a tractor frame until a uniform web is obtained. In both cases, the result is a mixed material web with well mixed different fibers for supplying e.g. a jet air spinning machine. However, the above conventional methods, while guaranteeing good quality of the yarn obtained, are expensive, since the combination of the various mixtures requires additional maintenance and handling. This known type of process is currently used for hybrid yarns and hybrid yarns (cotton/polyester, cotton/viscose etc.). Furthermore, the known solutions have the disadvantage that the mixed material needs to be processed into a single web in such a way that the guiding tube of such a mixed web in the drawing device is contaminated with fibers, for example a colored material embedded in the mixed web itself. This means that the transition from one hybrid wire to another requires that the guide tube be cleaned first to prevent contamination of the subsequent wire. Furthermore, the known solutions require modifying the calibration of the spinning machine according to the hybrid yarn to be treated, which means that it is necessary to change the machine settings from time to time according to the yarn count of the hybrid net to be drawn. Furthermore, the known solutions do not allow the use of carded fibers for spinning with a jet system, since the fiber length is too short and the low uniformity makes it impossible to process on current air-drawn systems, whereas by the proposed solutions, carded fibers (combed fiber) can be spun with a jet spinning system by mixing them with combed fibers (combed fiber) in the appropriate percentages. Disclosure of Invention Accordingly, a need has been recognized to address the shortcomings and limitations cited with reference to the known art. The drawing method and apparatus of an air spinning machine having a plurality of feeders according to the present invention satisfy such a need. The invention provides a drawing method for an air spinning machine with a plurality of feeders, comprising the steps of-preparing at least two textile webs to be fed by means of at least a respective first and second guide element upstream of an air spinning device, -drawing the textile webs separated from each other with a plurality of pairs of drawing rollers, each pair of drawing rollers comprising a driving roller and a guiding roller, said drawing rollers being adapted to perform a progressive drawing of each of the textile webs intercepted simultaneously by the drawing rollers, -feeding the drawn and separated textile webs to a spinning chamber of the air spinning device to obtain the desired hybrid yarn. The invention furthermore provides a drawing device for an air spinning machine with a plurality of feeders, comprising at least a first and a second guide element independent from each other so as to be able to feed at least two separate textile fibre webs simultaneously, an air spinning device adapted to spin said textile fibre webs, a drawing device placed between said first and second guide elements and said air spinning device, said drawing device comprising a plurality of pairs of drawing rollers, each pair of said drawing rollers comprising a driving roller and a guiding roller, said drawing rollers being adapted to perform a progressive drawing of each of said textile fibre webs simultaneously intercepted by said drawing rollers. Drawings Other features and advantages of the present invention will become more apparent from the following description of a preferred and non-limiting embodiment thereof, in which: FIGS. 1a to 1b are plan views of differe