RU2230841C1 - Method for producing of short-staple flax fiber - Google Patents

Abstract

FIELD: primary processing of bast-fiber crops, in particular, flax fiber for obtaining of short-staple flax fibers adaptable for manufacture of mixed yarns.

SUBSTANCE: method involves combing fibers; forming sliver from fiber; feeding sliver to processing zone and providing defibration of fibrous complexes in sliver by carrying-out multiple sign-variable sliding flexures over rounded edges of movable beaters at relative sliding speed of at least 40 m/s; obtaining required length of fibrous complexes during defibration processes by changing sliding speed or distance from sliver clamping zone to processing zone.

EFFECT: reduced linear density of fiber during defibration process, improved quality of cleaning fiber from non-fibrous contaminants and providing for required fiber length variation level.

2 dwg

Description

The invention relates to the field of primary processing of bast fibers, mainly flax, and can be used to produce short staple flax fiber suitable for the production of blended yarns.

A known method of producing a length-modified (short-staple) flax fiber, including preparing a mass of un-parallelized fibers and their release based on the use of carding effects [1].

However, in this method, as a result of using the scratching action, a fiber is formed with an increased unevenness in length. The reason for this is the peculiarity of the effect of the needles of the carding set on the technical complex of fibers that are held by anastomotic bonds.

A known method of obtaining short-staple flax fiber, including the operation of carding fiber, forming a tape from it, feeding it into the processing zone and razvolokanie [2].

The disadvantage of this method [2] is the use in cutting cutting of technical fibers, as a result of which an increased percentage of very short fibers is formed. With further processing, these fibers fall into fumes at the transitions of pre-spinning and contribute to the formation of breaks in the yarn upon receipt. Thus, the use of fiber cutting reduces the utilization rate of short-staple linen for yarn production, and the spinning process itself proceeds with increased breakage of the yarn.

The known method [2] in its technical essence and the achieved effect is closest to the claimed one and therefore can be selected as a prototype.

This problem is achieved due to the fact that in the method for producing short-staple flax fiber, which includes operations of carding fiber, forming a ribbon from it, feeding it into the processing zone and razvolokanie, according to the invention, razvolokanie fibrous complexes in the tape is carried out by repeatedly sliding alternating bending along rounded edges moving beats at a relative sliding speed of at least 40 m / s, and obtaining the necessary length of fiber complexes in the process of rafting tsya by changing the sliding speed, or the distance from the point of clamping the tape prior to its treatment zone.

The fibration of fibrous complexes by their alternating sliding bending along the rounded edges of the moving beats at a relative sliding speed of at least 40 m / s will allow avoiding cutting of technological fibers, as a result of which an increased percentage of very short fibers that fall into fumes due to spinning transitions and lead to the formation of breaks yarn upon receipt. This is because in the process of repeated effects of alternating sliding bending, the interfiber bonds are weakened and, as a result, the fibers are separated from each other. Ensuring the relative sliding speed of the fibrous tape along the edge of at least 40 m / s leads to the formation of inertia forces necessary for the removal of individual fibers from the tape. Obtaining in the process of fiberizing fibrous complexes of various lengths by changing the sliding speed or the distance from the point of clamping the tape to the zone of its processing provides an extension of the range of application of the obtained fiber, for example, with a length of fibrous complexes of 40 mm, they can be used to produce cotton yarn, and with a length of 70 mm - for the production of wool yarn. Thus, the proposed method of fiberizing improves the efficiency of fiberizing short-staple fibers and provides more uniform fiber lengths.

1 schematically shows a cross section of a zone of an example of a fiberizing when the fiber is at the beginning of the processing zone; figure 2 - the moment of withdrawal of the formed fibrous complexes from the treatment zone.

The method of fibrous fibrous complexes in the tape is implemented, for example, as follows. The linen tape 1 is clamped in the feed rollers 2 and fed to the treatment zone A. After entering the treatment zone, the moving tape is subjected to trepidation by repeatedly sliding it alternately bending along the rounded edges of the moving beater 3 mounted on the scraper drums 4. In this case, the relative sliding speed of the fiber along the edge of at least 40 m / s. In the process of interaction is the destruction of interfiber links. Further, already fibrous fiber complexes 5 under the action of centrifugal forces and air flows are removed from the tape and the processing zone using the pneumatic transport system 6.

The length of the fiber complexes after razvolennost can be adjusted by changing the speed of rotation of the scuffing drums 4 or changing the distance B from the point of clamping of the tape to the zone of its processing.

Using the proposed method does not require significant capital costs, and its implementation can be carried out in the conditions of flax plants.

Sources of information

1. V.V. Zhivetin, A.I. Ryzhov, L.N. Ginzburg. Movolen (modified flax fiber). - M.: Publishing house ROZITLP, 2000, 205 p.

2. RF patent No. 2090668, MKI D 01 G 1/00, publ. 09/20/97, Bull. No. 26, authors Ilyin L.S., Shteinbakh V.P., Lavrentieva E.P.

Claims (1)

A method of obtaining a short-staple flax fiber, including the operations of carding fiber, forming a ribbon from it, feeding it into the treatment zone and razvolnenie, characterized in that the razvolokanie tape is carried out by repeatedly sliding alternating bending along the rounded edges of the moving beaters at a relative sliding speed of at least 40 m / with, moreover, obtaining in the process of razvolennosti the required length of fibrous complexes is achieved by changing the sliding speed or the distance from the clamp point of the tape d its processing zone.

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