RU2104340C1 - Method for mechanical stapling of linen filaments in tape - Google Patents

Abstract

FIELD: textile industry. SUBSTANCE: method involves picking apart linen filaments in direction transverse to tape made from these filaments and simultaneously compressing tape at uniform distance from picking apart station. Prior to stapling procedure, filaments are subjected in alternation to crumpling and reciprocating shifting of filaments transverse to tape. EFFECT: increased quality of filaments by reduced density, uniform length and width and improved cleaning of filaments from nonfibrous contaminants. 2 cl, 1 dwg

Description

 The invention relates to the textile industry, and in particular to a method for stapling textile fibers.

 A known method of stapling textile fibers, based on the formation of a bundle of fibers and stapling them by passing between a pair of spring-loaded rolls, one of which has cutting knives on the surface (1).

 This method does not allow to provide the necessary unevenness of the fibers after stapling the linen fibers in the form of a tape, since the technical linen fiber consists of elementary fibers that are discrete in length.

 A known method of mechanical stapling of linen fibers in a tape, which consists in the formation of a stream of fibers in the form of a tape and stapling by plucking (2).

 However, in this method, the fibers formed by plucking also have an increased unevenness in their length and thickness, since most of the fibers in the fiber flow are not fixed when they are plucked. In addition, the fibers are obtained with increased linear density, and on their surface stapling by a known method there are many cellulosic substances that reduce the processing efficiency when yarn is mixed with other fibers.

 The objective of the invention is to provide a method for the mechanical stapling of flax fibers in a tape, providing a technical result, consisting in reducing the linear density of the fiber, its unevenness in length and thickness, as well as more complete cleaning of non-fibrous impurities.

 The technical result of the invention is to form a stream of flax fibers in the form of a tape and stapling by unscrambling them, and this is achieved by stapling the flax fibers by unscrambling them across the tape while compressing it at an equal distance from the sprinkling zone.

 Before stapling, the flax fibers are subjected to alternating effects of crushing and reciprocating shear in the tape in the transverse direction.

 The drawing shows a diagram of a device for implementing the method.

 According to the method, the flow of flax fibers 1, formed in the form of a tape as a result of, for example, carding and tape formation, enters the moulder rolls 2 with longitudinal flutes, in which it sags and deforms, becoming corrugated. As a result of this, the Promin fiber is partially split. After the milling rolls, the fibrous tape enters the rolls 3 installed with a gap and with transverse flutes. In this case, one of the rolls makes a reciprocating motion along the axis of rotation, which leads to a shift of the fibers in the tape relative to each other and as a result to their thinning, splitting due to the reduction of interfiber bonds and release from non-fibrous impurities. Next, the fibrous tape again enters the mnalny pair of rolls 2, where there is an additional promin and there is a migration of fibers along the cross section of the tape, its shaking near these rolls. This combination of mnal and fiber shifting effects is performed several times in order to clean the fiber from non-cellulose impurities and lower its linear density due to the splitting of technical complexes. After alternating grinding and shear rolls, the fibrous tape falls between the rotating spring-loaded corrugated feed rolls 4, where the fibers are compressed, making it impossible to pull them out of the rolls 4. After the rolls 4 along the belt, the receiving rolls 5 are similar in design 5. Between the supply and receiving pairs rolls is a zone of plucking. In the middle of this zone, the fiber is directly plucked with working teeth 6, mounted on a disk 7, rotating from the shaft 8. Moreover, the disk 7 itself is mounted on a carrier 9, which rotates on the shaft 10. The rotation speeds of the feed 4 and receiving 5 rolls are equal and proportional to the rotation speed shaft 10. This ensures the plucking of the fiber in the tape through equal segments of its length.

 Due to the rotation of the tooth disk 7, the fibers are cleaved across the belt. In this case, the ends of individual elementary linen fibers or complexes are effectively pulled out of the totality of technical fibers located in the area of plucking, without any damage and destruction of the fibers themselves.

 After passing the fibers of the take-up rolls 5, they are removed from the plucking zone and, using pneumatic conveying, are discharged into the collection hopper.

 Thus, this method provides the production of flax stapled fiber with a reduced level of destruction of elementary fibers and their complexes, a reduced level of linear density of the fibers and more purified from non-fibrous impurities. A decrease in the level of broken fibers, a low linear density of the fiber and their increased purity, in turn, leads to a decrease in the variation of the fibers in mass along their length and diameter and to their more efficient use in the production of yarn mixed with other fibers, such as cotton, wool and chemical fibers.

Claims (2)

 1. The method of mechanical stapling of flax fibers in the tape, which consists in forming a flow of flax fibers in the form of a tape and stapling by unscrambling, characterized in that the stapling of flax fibers is carried out by unscrewing them across the tape while compressing it at an equal distance from the area of unscrewing.  2. The method according to claim 1, characterized in that before stapling the flax fibers are subjected to alternating effects of crushing and reciprocating shear in the tape in the transverse direction.