RU2335585C1 - Method of continuous recovery of flat hards on flat carding machine and device to this effect - Google Patents

Abstract

FIELD: mechanics, transport.

SUBSTANCE: method of continuous recovery of flat hards on the carding machine includes removing the flat hards representing a band made up of alternating condensed and loose strips, extracting the litter from the hards and transmitting recovered spinned fibers to carding. The condensed strips are separated from each other along the loose band part, the hards discrete strips are formed and laid along the conveyor belt by connecting the ends of the previous and following strips so that to form a continuous fibrous band. The flat hards continuous recovery device on the carding machine incorporates a conveyor belt, a pair of feed rollers, a separation mechanism. Above the horizontal conveyor belt, a feeding device is arranged and made up of two feed rollers located on at a distance corresponding to the total width of the condensed and loose aforesaid strips. A linear speed of the separating pair and that of the conveyor equal to the former relate to the take-up pair linear speed as the hards strip length relates to the total width of its condensed and loose parts.

EFFECT: higher efficiency of cleaning and extracting spinned fiber.

2 cl, 7 dwg

Description

The invention relates to a carding machine spinning textile industry.

There is a method of regeneration of cap tow on a cap carding machine, characterized by removing tow from the caps, which is a web of alternating condensed and discharged strips, litter from it and transferring the regenerated spun fiber for combing [1].

However, the known method does not provide an acceptable quality product for the continuous regeneration of spun fibers from tows and return them to their process.

As a prototype of the method, a method for continuous regeneration of tow tows on a hat carding machine [2], in which the removed tow tow to align its structure is formed into a tape, from which litter is extracted and regenerated fibers are transferred for combing.

However, the tape thus formed is difficult to develop for the removal of litter, which complicates the process of cleaning it and does not provide sufficient quality of the regenerated fiber.

A device for the regeneration of hatchets on a hatchet carding machine containing a mechanism for returning tows, a separation mechanism and a heave means [3].

The disadvantages of the known device is the low quality of the product and the large loss of fiber.

As a prototype of the device, a device for continuous regeneration of a hatchet on a carding machine [4] was adopted, containing a feed conveyor belt, a pair of feed rollers and a separation mechanism, including combing and cleaning drums, grate grates, a scavenger and a regenerated fiber return mechanism.

The disadvantage of this device is that the tape-forming mechanism forms an excessively thick and loose ribbon, which reduces the efficiency of the separation mechanism.

The technical result of the invention is to increase the efficiency of cleaning the flat tow and allocation of spun fiber from it.

The specified technical result is achieved by the fact that in the method of continuous regeneration of the hatchet on the hatchet carding machine, characterized by removing the hatchet, which is a web of alternating thickened and sparse strips, separating litter from the tow and transferring the regenerated spun fiber for combing, according to the invention, the thickened strips of the separator apart from each other along the rarefied part of the web, discrete strips of tow are formed and laid along the conveyor web, connecting the end s of the previous and the beginning of subsequent strips of flap butt, forming a continuous fibrous tape. And in the device for implementing the method, comprising a feed conveyor web, a pair of feed rollers and a separation mechanism including combing and cleaning drums, grate grates, a scavenger and a regenerated fiber return mechanism, according to the invention, the feed conveyor web is installed horizontally, over it along its entire length a power device is installed, consisting of two pairs of rollers mounted one above the other at a distance corresponding to the total width thickened th and sparse stripes of the hatchet, the linear speed of the separating pair and the equal linear velocity of the conveyor refer to the linear speed of the receiving pair equal to the speed of the hatchet, as the length of the strip of tow refers to the total width of its thickened and rarefied parts.

The technical result of the invention is achieved by eliminating the addition of tow cloth in the middle of its width and the formation of a thick, loose ribbon. In the claimed invention, the supply of hatchet strips to the separation mechanism is carried out due to their separation from the main cloth of the tow, controlled by the receiving pair of rollers, by means of the outgoing speed of the releasing pair of rollers and sequential transportation in the form of an endless belt to the supply rollers of the device. Thus, the alignment of the fibrous flow is carried out due to the portioned addition of the condensed and rarefied tow bands, the formation of an endless, sufficiently thin supply tow band so that fibers from the thickened and rarefied tow parts are located in any section. Thus, the method and device provide a set of processes of a continuous and cyclic nature in the formation of towing feed tape. This formation of the feed product provides more comfortable working conditions for the separation mechanism, and therefore, more efficient removal of weed impurities from the weed fiber mass.

Figure 1 (a, b, c, d, d) shows the phases of the process of forming a supply tape from a canvas: a) the phase of the beginning of the passage of the clamping line with a thickened strip of tow and the maximum length of the supply tape on the conveyor belt; b) - the phase of the beginning of the passage of the clamping line with a rarefied strip of tow and a decrease in the length of the supply tape on the conveyor belt; c) - the phase of approaching the thickened strip of webs to the next clamp line, the exit of the rarefied strip of webs from the previous clamp line and a further decrease in the length of the feed belt on the conveyor belt; g) - phase separation of paired (thickened and rarefied) strips of tow from the main canvas; d) - laying torn strips on the conveyor belt butt and the minimum length of the supply tape. Figure 2 shows a device for the continuous regeneration of the flat tow: a) - General view; b) is a section along aa in figa.

The technology of the method involves the presence of three technological zones (figa):

I - zone of the controlled output of the tow web 1, consisting of alternating thickened 2 (corresponding to caps) and sparse 3 (corresponding to inter-cap spaces) strips;

II - separation zone of paired (condensed 2 and rarefied 3) strips along the rarefied strip;

III - the zone of formation of the supply endless tape 4.

Technological zones are within the boundaries (figb): the width of the cloth hatchet 5 and 6, the line of descent (removal) of tow from the hatchet 7; clamp lines of tow 8 by slowly rotating rollers 9, clamp lines of tow 10 by rapidly rotating rollers 11, lines of formation and output of the supply tape 4.

The tow clamping lines 8 and 10 are at a distance from each other (wiring)

R = S = S ₂ + S ₃ ,

where S is the total width of the condensed S ₂ and rarefied S ₃ strips of hatchet 1.

The tow 1 is removed from the hats of the hat fabric, displayed in the area of the controlled output I (figa) and during the entire time the tucked machine is in operation, it is under control and moves at the speed of the hat fabric. From the technological zone I, the tow is discharged into the separation zone II (Fig. 1b, c), where it is in an uncontrolled state and continues to move at the speed of the flat head. This zone has a length R equal to the total width S of condensed 2 (S ₂ ) and sparse 3 (S ₃ ) strips of hatchet (figa). Upon reaching the clamp line 10 (FIG. 1 c), the tow section located in the separation zone sharply switches to a significantly higher speed mode and breaks away from the main tow line along the clamp line 8 (FIG. 1 d) with a newly acquired speed. During the passage of this section of tow (S = S ₂ + S ₃ ) of the separation zone II, the end of the supply tape 4 will move from the border of the width of the tow 6 to border 5 (figa, b, c, d) and at the time of separation will reach border 5. The torn off part of the tow is laid on the vacant portion of the feeding conveyor belt end-to-end to the end of the previous leaving portion of the tow (Fig. 1d), forming a continuous supply tape 4 (Fig. 1a). Thus, the formation of a continuous feed tape is carried out by a combination of the following successive technological processes: continuous controlled output of the tow web in zone I; cyclic discrete output of paired (condensed - rarefied) strips of strips with their separation from the main strips of the tow in zone II and the continuous withdrawal from zone III of the supply tape 4, formed by a discrete increment from min to max smoothly extending from max to min the end of the tape.

A continuous cap tow regeneration device on a carding machine comprises a feed device consisting of a receiving 9 and releasing 11 pairs of rollers mounted in a feed shaft of the hopper 12, above the horizontal feed conveyor belt 13 along its entire length. The distance between the horizontal axes of the pairs of rollers 9 and 11 is equal to the total width of the condensed and rarefied strips of tow. In continuation of the conveyor belt 13, a feeding pair of rollers 14 is mounted, one of which is fitted with a serrated headset.

The separation mechanism of the continuous regeneration device contains three serrated drums 15, 16 and 17. The drums 15 and 16 are fitted with a headset with a parallel arrangement of the working faces of its teeth. For wiring with drums 15 and 16, a drum 17 is installed in the space above them, fitted with a headset with a cross-section of the working faces of the teeth relative to the working faces of the teeth of the drums 15 and 16. Above the drums 15, 16 and 17 there is a dust-free pneumatic chamber 18 with a perforated bottom, which is top guard for drum headsets. Under the drums 15 and 16, grate grates 19 are installed, under which a pickup 20 and a screw device for discharging secondary waste products are mounted 21. The screw device 21 is connected to the dedusting pneumatic chamber 18 by a side pneumatic channel (not shown in the drawing). One of the walls of the pickup 20 serves as the inner wall of the pneumatic channel 22 returning the regenerated fiber coming from the fan 23, while the drum 16 is recessed into the pneumatic channel 22.

A device for continuous regeneration of a flat tow is as follows. The cap fleece fabric, consisting of alternating thickened and sparse strips, removed by a comb from the bonnet, slides into the shaft of the hopper 12 and falls into the clamp of the receiving rollers 9, with a linear speed which reaches the clamp of the output rollers 11, which, having a significant lead in linear speed , sharply separate from it a pair of tow strip and impose on the conveyor belt 13, which transports it to the sting of the feed rollers 14. Due to the fact that the distance between the clamps receiving 9 and releasing 11 rollers As the width of the strip, consisting of condensed and rarefied sections, its separation occurs along the rarefied section when the condensed section gets into the clamp of the pair 11. Due to the difference in the speeds of the rollers 9 and the conveyor 13, the beginning of the next strip joins the end of the previous one, forming an endless ribbon and ensuring continuity of supply separation device.

From the clamp between the feed rollers 14, the feed tape is fed into the development zone by the saw drum headset 15 in cooperation with the grate 19 and then with the saw drum 16. Due to the parallel arrangement of the working faces of the teeth of the drum headsets 15 and 16 and their counter rotation in the interaction zone the mass is subjected to intensive development and separation into two streams, one of which leaves the zone of interaction with the headset of the drum 16, and the other of the drum 15. In this case, the department the weed impurities from the fibers and their subsequent separation through the grate 19. The fiber flow that left the surface of the drum 15 is removed from it by the headset of the drum 17 due to the forward speed and the cross-location of the working faces of the teeth of the headset relative to the drum 15. The fiber flow is transported by the surface drum 17 under the perforated bottom of the pneumatic chamber 18, where it is dedusted, and at the point of interaction with the leading headset surface of the drum 16 goes to and this surface. Further, before interacting with the surface of the drum 15, the surface of the drum 17 moves clean without fibrous cover. The fiber flow captured from the drum 17 by the drum 16 is transported last to the point of interaction with the drum 15, where the fiber flows are added and separated, which contributes to additional fiber mixing and product alignment. The fibrous stream formed on the lower part of the surface of the drum 16 from the main and returned by the drum 17 flows is transported by it over the grate 19, with which the fibers and weed impurities interact. At the same time, weed impurities are emitted into the bin 20, and the fibers regenerated from the waste fall into the channel of the pneumatic conduit 22 of the fan 23, where they are removed from the headset of the drum 16 due to centrifugal force and an accelerating air stream and carried away into the main process stream of the pulp. They can be sent to the feed hopper or directly to the main or removable drums of the carding machine. From the pickup 20, the weedy impurities are discharged by a screw sowing device 21 into the pneumatic channel of dedusting the chamber 18.

Information sources

1. A.S. USSR No. 225044, D01G 15/72, 1967.

2. A.S. USSR No. 1108147, D01G 15/72, 1984.

3. A.S. USSR No. 1108148, D01G 15/72, 1984.

4. Testimonial. for a utility model of the Russian Federation No. 9613, D01G 15/72, 1999.

Claims (2)

1. A method for continuous regeneration of a hatchet on a hatchet carding machine, characterized by removing the hatchet, which is a web of alternating thickened and sparse strips, separating litter from the tow and transferring the regenerated spun fiber for combing, characterized in that the thickened strips are separated from each other along rarefied parts of the web, discrete strips of tow are formed and stacked along the conveyor web, connecting the ends of the previous and the beginning of the subsequent strips of the tow back to back, f forming a continuous fibrous tape. 2. A device for continuous regeneration of a hatchet on a hatchet carding machine, comprising a feed conveyor belt, a pair of feed rollers and a separation mechanism including combing and cleaning drums, grate grates, a scavenger and a regenerated fiber return mechanism, characterized in that the feed conveyor belt is installed horizontally , above it along its entire length a power device is installed, consisting of two pairs of rollers mounted one above the other at a distance Corresponding to the total width of condensation and rarefaction pileate tow strips, and the linear velocity equal to and separating pairs s linear speed of the conveyor refers to a linear speed of the receive pair, equal to the speed pileate web as strips stripping length refers to the total width of its condensation and rarefaction portions.

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