RU2310021C1 - Method for differentiation of scutching process - Google Patents

Abstract

FIELD: textile industry.

SUBSTANCE: method involves varying intensity of action of scutching drums by using conical portion of drum and successively providing single-side and double-side scutching process when yarn enters scutching field; shifting free end of yarn from conical portion of scutching drum, when said end is hanging lower than surface of scutching field, by means of shield toward one of said drums for providing scutching mode including single-side scutching, which is substituted by double-side scutching process as diameter of drum conical portion increases.

EFFECT: increased efficiency by eliminating chaotic movement of free end of yarn.

Description

The invention relates to the primary treatment of bast fibers and can be used to provide differentiation of the beating process in mulle-boggling aggregates intended to produce beaded fibers.

There is a method of differentiating the process due to the conical part of the scraper drum [1, p. 126] located at the entrance of the material to the scraper section. The change in the intensity of the effects on the strand on the conical section of the drum occurs due to the fact that:

- the linear velocity of the edge of the beat on the conical portion of the drum changes, since it depends on the radius of rotation of the edge of the bead bar;

- with increasing radius of the drum, the total angles of coverage of the strand of edges increase;

- the length of the section of the strand exposed to the beat increases, since the meeting point of the beat with the material as it is processed in the conical section of the drum “rises” to the point of clamping of the strand.

The disadvantage of this method is that the end of the strand falls below the scuffing field and, under the action of alternating, repeated influences, the drum beat makes random, random probabilistic oscillatory movements with a large amplitude, while the strands are mixed up, which subsequently leads to their breakage.

A known method of differentiating the beating process due to the gradual introduction visor [2], which takes the strand away from the beating field at the beginning of the beating process. This arrangement of the visor provides at the beginning of the processing one-sided beating and the gradual, as the size of the discharge visor decreases, the replacement of one-sided beating with two-sided.

A disadvantage of the known solution is that the strand located on the visor is not fixed and is under the influence of beat drums and air currents. Since the air flows from the movement of the scuffing drums are directed along the strands not fixed on the visor, the position of the strands and the process of differentiation of the scuffing will depend on factors that have a random probability nature, for example, on the linear density of the layer or on the quality of the promin or the stiffness of the strands. The elimination of the above negative factors requires design complexity.

The closest in technical essence to the claimed solution is a method of differentiation of the beating process by combining one-sided and two-sided beating, implemented in a device for cleaning washed stems of bast crops [3]. In this method, at the beginning of beating, the strand is exposed to one drum. For final fiber cleaning, double-sided scuffing is used. With unilateral flashing, the load on the strand is smaller in size than with bilateral. The change in the tension forces of the strand is caused by the change in the tension force in the branch running onto the edge of the beat bar and the angle of the strands of the edge of the beat bar. To process long-stemmed raw materials in the double-sided processing zone, additional visors are mounted that limit the movement of the free end of the strand.

The disadvantage of this method is that the design of the drum is complicated, since it requires the use of technical solutions to eliminate windings on the drum shaft in the area where one-sided beating is carried out. In addition, the combination of one-sided and two-sided scuffing requires an increase in the length of scuffing drums or an increase in the rotational speed of the drums, which entails an increase in the intensity of impacts on the material. The diameter of the scraper drum should be chosen reasonably, so that in case of bilateral scuffing, the strand along its entire length is subjected to periodic, alternating effects of beaten paired drums. In this case, the installation of additional visors in the double-sided treatment zone on the cylindrical part of the scutching drum is impractical.

An object of the invention is to eliminate the chaotic movement of the free end of the strand caused by periodic, alternating effects of beat paired drums on the conical section of the scraper drum.

The stated technical problem is solved due to the fact that when the strand enters the bobbing field and then on the conical section of the bobbin drum, its free end falling below the bobbing field is diverted by a visor to one of the drums, thereby creating a bobbing mode in which one-sided bobbing as increasing the diameter of the drums in the conical section of the drum is replaced by two-sided.

The foregoing is illustrated by the drawings. Figure 1 and Figure 2 shows a view of the scuffing drums front and side, where 1 - scuffing drums, 2 - discharge visor, 3 - beater, 4 - strand enveloping the edges of the beater bars and located on the cylindrical part of the drum, 5 - a strand located on the conical section of the drum, 6 - a strand located at the entrance to the processing zone.

The claimed method is implemented as follows. The strand at the entrance to the treatment area with scraper drums 1 and further along the conical section of the drum is diverted by a visor 2 to the left scraper drum in the drawing. In this case, the amplitude of the transverse vibrations of the free end of the strand is small and is determined by the conditions of interaction only with the beaters of this drum. At the beginning of processing on a conical section, the strand is subjected to one-sided beating. The intensity of the impact is minimal. As the diameter of the drums in the conical section increases, one-sided beating is replaced by two-sided. The intensity of the impact increases. The length of the free end of the strand (not subject to two-sided fluttering) gradually decreases, and on the cylindrical part of the drum, the intensity of the impact reaches a maximum value, and the lateral movements of the end of the strand become not dangerous from the point of view of entanglement of the ends and breakage of the strands.

When using the proposed solution with the help of easily implemented structural means, the chaotic movement of the free end of the strand that falls on the conical section of the scraper drum below the scuffing field is eliminated.

The proposed method, by eliminating chaotic movement on the conical section of the bobbin drum with a large amplitude of the free end of the strand due to periodic, alternating effects of beaten paired drums, will reduce the intensity of the effects on the strand, that is, reduce the tensile forces of the strands in the initial stage of the bobbing process, which will increase the yield long fiber - the most valuable primary treatment of bast fibers.

Information sources

1. Dyachkov V.A. Designing machines for the primary processing of bast fibers: - Kostroma: KSTU, 1999. - 208 p.

2. RF patent 2186163 "Method for producing long fiber". Publ. BI No. 21 dated 07/27/2002.

3. RF patent 2179205 "Device for cleaning washed stalks of bast crops." Publ. BI No. 4 of 02/10/02.

Claims (1)

The method of differentiation of the beating process, which consists in changing the intensity of the impact of the beater drums due to the use of the conical section of the drum and the sequentially applied one-sided and two-sided beating, characterized in that when the strand enters the beater field and then on the conical section of the beater drum, its free end falls below the field scuffing, divert the visor to one of the drums, while creating a scuffing mode in which one-sided scuffing as the diameter of the ba increases rabanov in the conical section is replaced by bilateral.

Images