RU2503756C1 - Drum of blowing machine for treatment of bast fibres - Google Patents

Abstract

FIELD: textiles, paper.

SUBSTANCE: drum of blowing machine for treatment of bast fibres comprises beaters located circumferentially, attached on the shaft by means of crossbars carrying under-beater grid, as well as several beater planks on each beater, which have a different outreach of the edges relative to each other. According to the invention, the working edges of all beater planks have a wavy shape, at that the crests of the adjacent planks are offset relative to each other along the length of the drum, and the outreach of the working edges of the beater planks relative to each other may vary along the length of the drum.

EFFECT: use of this construction of the scutching drum enables to improve the removal of chaff of bast fibres at early stages of the scutching process and in the area at the line of clamp; the intensification of removal of chaff will increase the yield of the scutched flax due to maintaining long-fibre complexes.

1 cl, 3 dwg

Description

The invention relates to the primary processing of bast fibers, mainly flax, and can be used to obtain scaffold from bast fiber material.

Existing flax scuffing technology is based on the use of scaffold drums. However, when the flaxcake moves along the initial zone of the drum due to its increased taperedness and consequently increased bending stiffness, significant tensile forces arise in the runaway branch of the strand, which leads to fiber breakage and a decrease in the yield of a long fiber. In this regard, reduce the frequency of rotation of the drums. However, such a solution leads to a deterioration of de-sharpening of the stems in subsequent working areas of the drum as the material is processed.

Therefore, to increase the efficiency of the beating process, it is necessary to minimize the breakage of the fibers in the initial zone of the drum due to more efficient removal of the fire and to maximize the efficiency of processing the strands when it passes through the subsequent zones of the drum.

This problem is relevant and its solution is of practical importance. For fluttering flax, various drum designs are used.

A known design of a bobbin machine for processing bast fibers, containing beater strips placed around the circumference, mounted on a horizontal shaft by means of crosses carrying knock-out grids [1]. Each beater bar has a visor located on the back side and rigidly connected to the bar, which is made in the form of a set of additional bars with wave-shaped working edges installed with different angles with respect to the surface of the beat edge.

However, this design does not provide effective processing conditions due to the fact that a multi-edged wavy back plate interacts with the strand at a considerable distance from the layer clamp line. As a result, this leads to insufficient conditions for removing the fire from the raw layer and, as a result, to increased pointedness in zones of the strand close to its clamp.

Also known is the design of the drum of the bast fiber processing machine [2], which comprises a beater arranged around the circumference, fixed to the shaft by means of crosses carrying a knock-out grill, as well as several beater strips on each beater that have different projections of edges relative to each other.

The disadvantage of this device is the lack of efficiency in removing bonfires from the aggregate of strands in the initial stages of interaction. The layer is compacted in contact with the working edges of the planks, which prevents the exit of the fire.

According to its technical nature and the achieved effect, the device [2] is the closest to the claimed one and therefore can be selected as a prototype.

The basis of the invention is the task of improving the design of the bobbin machine drum to improve sanding during processing of bast fibers so that at the initial stages of the bobbing process and in the area near the clamping line, the degree of separation of the bonfire from the raw layer is greatest.

The problem is solved in that in the drum of a basting machine for processing bast fibers, containing beater arranged around the circumference, fixed to the shaft by means of crosses carrying a knock-out grill, as well as several beater strips on each beater, which have different projections of edges relative to each other, according to of the invention, the working edges of all beating planks have a wave-like shape, with the wave tops of adjacent planks being offset relative to each other along the length of the drum, and the overhang of the working edges of beating planks with respect to th to each other may vary according to length of the drum.

The wave-like shape of the working edges of all beating planks of a multi-edged beat allows loosening the strands during the friction process and, thereby, improves the conditions for the fire to exit the processed strand under the action of shock and sliding impacts of the edges. Moreover, the beginning of the process of loosening occurs immediately after the interaction, namely at the clamping zone.

In addition, this shape of the edge allows you to increase the intensity of the impact in the scuffing field at an earlier stage.

The possibility of changing along the length of the take-off drum of the working edges of the beater bars in relation to each other is achieved by shifting the wave vertices of adjacent bars. This provides the opportunity to create the best conditions for sanding taking into account the initial properties of the processed material, which affect the nature of the allocation of fires in the process of beating (along the length of the drum).

The invention is illustrated by drawings.

Figure 1 shows the design of the drum bobbin machine for processing bast fibers. Figure 2 shows a cross-section aa beat drum. In figure 3. An isometric view is shown in the direction of the scutching drum section (for example, between two crosses).

Between the disks 1 of the drum of the bobbin machine, beats are mounted, mounted on the shaft 2 with crosspieces 3. The bears carry a lamellar grill 4 and beater bars 5. Between the main beater bar and the beater grill there are additional beater bars. The main and additional beater trims have a wave-like working edge and are located in height relative to each other with a certain step, allowing the fire to more effectively stand out from the scuffing field. In this case, the wave peaks of adjacent beating strips are offset relative to each other along the length of the drum by half a step.

The drum bobbin machine for processing bast fibers works as follows. The washed material (raw) by a clamping conveyor is driven into a bobbin machine. When the drums rotate, the main and additional beat bars affect the bast-fiber material, clearing it of the fire. Due to the fact that the wave vertices of the adjacent beat strips are displaced relative to each other during the rotation of the drum by half a step, when they slide along the fiber, the material loosens and its bulk density increases, which in turn facilitates the exit of the bulk fire from the thickness of the processed strand.

In the case of processing the bast-fiber material with other properties, the beat plans are reinstalled, ensuring the ratio of the outflow of their edges so that the process of decontamination proceeds in the best way.

The use of this design of the scraper drum allows to reduce the mass fraction of the bonfire in the long fiber obtained by scuffing. In addition, the intensification of the removal of fires will increase the yield of scruffy flax due to the preservation of long-fiber complexes.

Information sources

1. Pat. 2165487, Russian Federation, IPC D01B 1/16. Section of a bobbin machine for processing bast fibers [Text] / A.B. Lapshin, S.E. Mayansky, E.L. Pashin. - Publ. 04/20/2001.

2. Pat. 2151222, Russian Federation, IPC D01B 1/16, D01B 1/26. The drum of the bobbin machine for processing bast fibers [Text] / A.B. Lapshin, E.L. Pashin, S.M. Vikharev. - Publ. 06/20/2000.

Claims (1)

A drum of a bast fiber processing machine, comprising a beater circumferentially mounted on a shaft by means of crosses carrying a knockout grill, as well as several beater bars on each beater, which have different projections of edges relative to each other, characterized in that the working edges of all beater planks have a wave-like shape, with the tops of the waves of adjacent planks offset relative to each other along the length of the drum, and the overhang of the working edges of the beater planks with respect to each other can vary along the length of the ba Abana.

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