RU2250942C1 - Method of mechanical stapling of a flax fiber in a band - Google Patents

Abstract

FIELD: textile industry; methods of stapling of a flax fiber .

SUBSTANCE: the invention is pertinent to a textile industry, in particular, to a method of stapling of textile fibers. The purpose of the invention is to increase efficiency of purification of produced flax fibers out of non-spinning fibrous complexes of small length and non-fibrous impurities. Elimination of shortcomings of the well known method and reaching of the indicated purpose is ensured, that during stapling the formed air-fibrous mixture at leaving a zone of stapling is subjected to separation, that is to separation into two streams, one of which contains the lengthy fibrous filaments, and other - non-fibrous impurities and non-spinning fibers. The separation is conducted by interaction of the air-fibrous mixture with a system of tools, which edges are located at an angle to the direction of movement of an air-fibrous stream, and the distance between edges of the tools can vary.

EFFECT: the invention ensures increased efficiency of purification of produced flax fibers out of non-spinning fibrous complexes of small length and non-fibrous impurities.

3 dwg

Description

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

A known method of stapling fibers, including the formation of a fibrous layer of oriented along the entire length of the fibers and their stapling by machining (RU 2090668 C1, 09/20/1997).

However, when using this method, on the surface of the fibers after they are stapled, there are many fibrous impurities that reduce the efficiency of processing the fibers in a mixture with other fibers in the production of yarn.

A known method of mechanical stapling of flax fiber in a tape, which consists in the formation of a stream of fibers in the form of a tape, its clamping and stapling by double-sided scuffing of the fiber in the direction perpendicular to the movement of the tape, with simultaneous two-sided impact on the processed part of the tape with air flows in the staple zone. (RU 2206646 C1, 04/29/2002). The disadvantage of this method is a significant variation in the length of the fibers and their clogging. The fact is that as a result of impacts, individual fibers, fibrous complexes and non-fibrous impurities (bonfire) are separated from the tape by beats. Fibrous complexes having a short length, as well as impurities, are non-spinning and either fall into the waste at the pre-spinning stage, which reduces the utilization of flax fiber, or worsen the properties of the resulting yarn. According to its technical nature and the achieved result, this method is the closest to the claimed one and therefore it can be selected as a prototype.

The objective of the invention is to provide a method of mechanical stapling of flax fiber in the tape, providing a technical result, which consists in increasing the efficiency of cleaning the resulting flax fiber from non-spun fibrous complexes and non-fibrous impurities.

This technical result with the method of mechanical stapling of flax fiber in the tape, which consists in the formation of a stream of fibers in the form of a tape, its clamping and stapling by two-sided scuffing of the fiber with simultaneous, two-sided exposure of the processed part of the tape by air flows in the stapling zone, according to the invention, is achieved by that in the process of stapling, the formed air-fibrous mixture upon separation from the stapling zone is subjected to separation by interaction with the slave system sneeze bodies change direction, thereby separating the air stream with impurities and not spinnable fibers from the flow of combined fibers with the required length.

The separation of the air-fibrous mixture on the basis of interaction with the system of working bodies that change the direction of movement of the fibers that make up this mixture, provides the separation of the mass of fibers into two components. The first of them contains indirect fibers and impurities, and the second contains fibers of the required length. Such separation reduces the cost of separating the fibers of the required length, does not require additional energy sources and the use of any complex technical systems.

Figure 1 shows a horizontal section of a device for implementing the method. Figure 2 and 3 shows sections aa and bb of the device. According to the method, the flow of flax fibers 1, formed as a result of carding and tape formation, in the form of a tape falls between the rotating spring-loaded corrugated feed grinding rolls 2. With their help, the tape is transported to the staple-freeing zone (which is limited by the casing 3), and fiber retention during stapling. After interacting with the rolls 2, the fibrous tape, being in the staple zone, is subjected to the double-sided impact of the scoring beat 4. In this case, the scuffing effects are carried out in a direction perpendicular to the movement of the tape. At the same time, the part of the tape processed in the stapling zone is subjected to the two-sided effect of air currents 5, which ensures more complete separation of extraneous, non-fibrous impurities from the fiber and helps to straighten the fibers after each trembling action. This increases the efficiency of the scuffing process, and hence stapling. The resulting air-fibrous mixture is removed from the device under the influence of air currents resulting from the rotation of the beater bars through the holes 6 in the casing. Next, the fiber is separated. Separation of fibers formed during stapling takes place on the basis of interaction with a system of working bodies that change directions and thereby separate the air flow with non-fibrous impurities and non-spun fibers from the flow of a set of fibers with the required length. Thus, after separation, two streams are formed, one of which contains fibers of the down group and the other containing long fibers. In addition, a bonfire is removed from the resulting mass of fibers with the help of separation together with the fibers of the down group, which improves the quality of the fiber modified by stapling.

The separation of the air-fiber mixture at the exit from the staple zone can be carried out, for example, according to the scheme shown in figure 3. The flow of air-fiber mixture 7, flying out of the device for stapling flax fiber in the tape, passes through a system of rods 8 installed in front of the holes 6 in the casing on the axis 9 with a certain step - d. In this case, the short fibers 10 freely fly through the system of rods (plates) or are little delayed relative to them when flying in the horizontal direction and are removed by suction. Long, spinning fibers 11 interact with the rods (plates), linger on them and, sliding on them, under the influence of aerodynamic pressure, enter the collection hopper.

Thus, this method allows to obtain flax stapled fiber with separated non-fibrous impurities and fibers not suitable for spinning. The increased purity of the spinning fiber and the more uniform composition along the length, in turn, leads to its more efficient use in the production of yarn mixed with other fibers, such as wool, cotton and chemical fibers.

Claims (1)

The method of mechanical stapling of flax fiber in the tape, which consists in the formation of a stream of fibers in the form of a tape, its clamping and stapling of the fibers by double-sided scuffing of the tape with simultaneous two-sided impact on the processed part of the tape with air flows in the staple zone, characterized in that air is formed during the stapling process the fibrous mixture at the exit from the staple zone is subjected to separation by interaction with the system of working bodies that change the direction of movement and it thus separating the airflow from impurities and not spinnable fibers from the flow of combined fibers with the required length.

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