Filling channel output device for carding machine

Abstract

The present invention relates a filling channel output device for a carding machine, said device being used to supply a fiber bundle from a filling channel of a carding machine into a feeding duct, being provided with an opening roller having a shaft and an axial working length, being provided with a feeding roller upstream from the opening roller, and being provided with an air supply duct comprising a first component and a second component. The air supply duct comprises an air flow control plate configured to change an air flow in the second component.

Description

[0001] FILLING CHANNEL OUTPUT DEVICE FOR CARDING MACHINE

[0002] TECHNICAL FIELD

[0003] The present invention relates to a filling channel output device, and specifically relates to an output device used to feed a fiber bundle from a filling channel of a carding machine into a feeding duct.

[0004] BACKGROUND

[0005] A carding machine cards a fed fiber material to form a sliver, and the sliver is then further processed into yam. However, the carding machine can also produce nonwoven fabric instead of slivers. The carding machine is typically provided with a filling channel, and fibers from an opening and cleaning system are conveyed to the filling channel via a duct. The fiber material is conveyed in the form of a fiber bundle. The fiber bundle conveyed by the duct fills the filling channel continuously or as needed. Conveying is performed pneumatically in most cases. With the aid of a feeding apparatus, the fiber bundle is introduced as a filler from the filling channel into the carding machine. The uniformity of the filler entering the carding machine plays an important role in the service life of working elements of the carding machine and in requirements on the quality of carding. The uniformity of the sliver or nonwoven fabric produced by the carding machine is also affected by the uniformity of the filler entering the carding machine. The weight of the filler entering the carding machine is another important technical variable in carding processes. The amount of the filler and the feed rate of the filler into the carding machine have a significant effect on the production capacity of the carding machine as well as the carding quality.

[0006] A feeding roller for continuously drawing a fiber bundle from the filling channel is provided in a lower portion of the filling channel. The fiber bundle drawn from the filling channel by the feeding roller is delivered to a feeding duct via an opening roller, so as to be subjected to additional opening and homogenization. In the feeding duct, the fiber bundle is shaped with the aid of compressed air to form a homogeneous filler formation suitable for being fed to the carding machine. A fan is further provided as an adjunct to the feeding apparatus. The fan allows an increase in pressure in the feeding duct and thus allows the fiber bundle to be compacted into the filler. Due to the weight of the fiber bundle and the pressure in the feeding duct created by the fan, the fiber bundle is compacted into the filler. Air flowing into the feeding duct due to the fan is drawn out of the feeding duct at an end portion thereof via an air-permeable wall. From the prior art according to CH 681371 A5, a feeding apparatus for a carding machine is known, wherein a fiber bundle from a filling channel (a storage channel) is discharged to a feeding duct of a carding machine by means of a feeding roller and an opening roller. Compacting air is also introduced into the feeding duct to convey and compact the fiber bundle on the opening roller. The compacting air is tangential to a surface of the opening roller so as to be guided, and passes on a portion of the surface of the opening roller before entering the feeding duct together with the fiber bundle. A disadvantage here is an uneven air flow caused by uneven coverage of the opening roller.

[0007] In addition, CH 690651 A5 further discloses a feeding device to a carding machine, wherein conveying air and compacting air also pass along an opening roller tangentially. Furthermore, an air flow passing in the direction of movement of a surface of the opening roller is used to provide pneumatic support for the separation of a fiber bundle from needles of the opening roller. A disadvantage of the disclosed air flow is that the amount of air passing along the opening roller is not constant due to variable coverage of the opening roller by the fiber bundle. This affects conveying of the fiber bundle in a feeding duct and compaction of the fiber bundle into a filler performed at an end portion of the feeding duct.

[0008] In addition, CN 110195273 A discloses a feeding apparatus for a carding machine. A filling channel output device is designed. An air flow is guided via an additional extending portion on an air supply duct, and can be adjusted by changing the step depth D of a lower wall of a second component. The objective is to controllably add conveying air and compacting air to a feeding duct without being affected by coverage of an opening roller and still achieve uniform distribution of the compacting air in the feeding duct. However, turbulence is generated when fibers from the opening roller enter the air flow, and the speed of the air flow decreases at the extending portion because an opening becomes larger, so that an air backflow occurs here. This may be a cause of fiber clog- ging that occurs here. Adjustment of the apparatus is therefore very troublesome, often resulting in poor operational performance.

[0009] SUMMARY

[0010] An objective of the present invention is to overcome the defects in the prior art and provide a filling channel output device configured to supply a fiber bundle from a filling channel of a carding machine into a feeding duct. Less turbulence is generated, and there is no more air backflow, so that an air flow is stable, and the fiber bundle can effectively enter the feeding duct, thereby avoiding clogging.

[0011] The objective is achieved via a device having the features in the independent claims.

[0012] To achieve the objective, provided is a filling channel output device for a carding machine. The filling channel output device is used to supply a fiber bundle from a filling channel of a carding machine into a feeding duct. The filling channel output device is provided with an opening roller having a shaft and an axial working length, is provided with a feeding roller upstream from the opening roller, and is provided with an air supply duct comprising a first component and a second component. The air supply duct comprises an air flow control plate configured to change an air flow in the second component.

[0013] The air flow control plate is configured to be adjustable by an adjustment element, and the adjustment element is preferably a screw. In this case, when the adjustment element is a screw, the air flow control plate may be a sliding air flow control plate. The adjustment element is configured to rotate in a first direction to slide the air flow control plate upwards to increase an opening of the second component, and rotate in a second direction to slide the air flow control plate downwards to decrease the opening of the second component. The first direction may correspond to the clockwise direction, and the second direction may correspond to the counterclockwise direction.

[0014] The air flow control plate and the air supply duct form an angle a therebetween. That is, an angle a is formed between the plane in which a portion of the air flow control plate facing the air flow in the air supply duct is located and the air supply duct. By means of the angle a, the air flow control plate is enabled to restrict the air flow, and the air flow is uniform over the entire working width. The selection of the angle a should ensure that the air flow is as laminar as possible even in a restricted throttling region, and air turbulence is prevented. Accordingly, the angle a is between 20° and 60°, preferably between 30° and 50°, and in particular between 40° and 50°.

[0015] The air flow control plate further comprises a winglet, and the winglet is used to change the air flow in the second component.

[0016] The bottom of the winglet has a guide surface. The guide surface and a lower wall of the second component form an angle (3, and the angle [3 is between 2° and 30°, preferably between 5° and 25°, and in particular between 10° and 20°.

[0017] The air flow control plate can effectively guide and improve the air flow in the second component, thereby stabilizing the air flow, e.g., avoiding backflow and turbulence. The air flow control plate may be moved up and down by means of the adjustment element, thereby changing the size of an air flow opening A in the second component, so that the air flow in the second component can be changed easily and simply according to actual requirements.

[0018] Alternatively, the air flow control plate may also be adjusted by means of a raising element. The raising element is preferably at least one strip having a thickness of, e.g., 1 millimeter, and is provided in an axially lengthwise direction between the air flow control plate and the air supply duct. The height of the air flow control plate is adjusted by increasing or decreasing the number of raising elements, thereby adjusting the size of the air flow opening A of the second component. The raising elements are provided between the air flow control plate and the air supply duct, and are fixedly connected to the air flow control plate and the air supply duct by means of screw nuts. Increasing the number of raising elements raises the air flow control plate, thereby increasing the air flow opening A of the second component. Conversely, decreasing the number of raising elements lowers the air flow control plate, thereby reducing the air flow opening A of the second component.

[0019] Preferably, the length of the raising elements is less than the length of the air flow control plate, and in particular, the length of the raising elements is less than or equal to half the length of the air flow control plate, so that in a lengthwise direction of the air flow control plate, raising elements separated from each other may be respectively provided on two sides of the air flow control plate. In particular, the number of raising elements on each side of the air flow control plate is different. The air flow opening A formed between the air flow control plate and the second component of the air supply duct may be used to affect dropping of fibers off the opening roller. The larger the air flow opening A, the more the air is concentrated in a middle portion in the lengthwise direction C. The narrower the air flow opening A is, the greater the speed of the air flow discharged to the outside is. If the raising elements on the two sides are different, the sizes of air flow openings A on the two sides are different, and the air flow can be correspondingly guided to one side. For a large air flow opening A, manufacturing tolerances are less important.

[0020] BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order for the content of the present invention to be more readily understood, the present invention will be described in further detail according to specific embodiments and with reference to the accompanying drawings, wherein:

[0022] FIG. 1 is a schematic side view of a carding machine in the prior art;

[0023] FIG. 2 is a side view of a filling channel output device of the present invention;

[0024] FIG. 3 is a partial view of the air supply device of FIG. 2 in a direction X;

[0025] FIG. 4 is a side view of another embodiment of the filling channel output device of the present invention; and

[0026] FIG. 5 is a schematic diagram of the air flow control plate and the raising elements of FIG. 4.

[0027] Reference numerals in the accompanying drawings are as follows: 1 , carding machine; 2, filling channel; 3, feeding duct; 4, fiber bundle; 5, filling channel output device; 6, feeding roller; 7, opening roller; 8, air flow; 9, air separator; 10, feeding apparatus; 11 , filler; 12, spiked roller module; 13, carding machine cylinder; 14, cover plate unit; 15, doffer; 16, sliver forming unit; 17, carding machine sliver; 18, feeding slot; 19, regulating valve; 20, first component; 21 , second component; 22, lower wall; 23, fan; 24, air flow control plate; 25, winglet; 26, adjustment element; 27, cover; 28, air supply duct; 29, flow direction; 30, air duct; 31 , roller shaft; 32, raising element; 33, screw nut; A, distance between air flow control plate and lower wall of second component of air supply duct; C, width of air supply duct; H, height of air supply duct; a; angle between air flow control plate and second component; and (3, angle between air flow control plate and second component.

[0028] DETAILED DESCRIPTION

[0029] Embodiment 1

[0030] FIG. 1 shows a carding machine 1 , which may for example be a rotary cover plate carding machine, equipped with a filling channel 2, a filling channel output device 5, and a feeding duct 3. A fiber bundle 4 that has undergone various processing steps of an opening and cleaning system enters the filling channel 2. The fiber bundle 4 is transferred to the feeding duct 3 by means of the filling channel output device 5. The filling channel output device 5 comprises a feeding roller 6, an opening roller 7, and an air supply device. The air supply device is provided in the filling channel output device 5 to enable the fiber bundle to move forwards to the feeding duct 3 and ensure that a filler upstream from a feeding apparatus 10 of the carding machine is compacted. The air supply device blows an air flow 8 tangentially along the opening roller 7 into the feeding duct 3, and thus compacts the fiber bundle into the filler upstream from the feeding apparatus 10 of the carding machine, as required for further processing in the carding machine. The air flow 8 blown by the air supply device is discharged to the fiber bundle and / or filler 11 in the feeding duct 3. The air flow leaves the feeding duct 3 by means of an air separator 9 of an air-permeable region of a wall at an end portion of the feeding duct 3. The feeding apparatus 10 downstream from the feeding duct 3 feeds the fiber bundle in the form of the homogeneous filler 11 to a spiked roller module 12 of the carding machine. The fiber bundle from the filler 11 discharged from the feeding apparatus 10 is further opened by means of a spiked roller apparatus in the spiked roller module 12, and some contaminants contained therein are removed simultaneously. The last spiked roller of the spiked roller module 12 finally delivers fibers to a carding machine cylinder 13, and the carding machine cylinder 13 completely loosens and parallelizes the fibers. The carding machine cylinder 13 thus cooperates with a cover plate unit 14. After being rotated a plurality of times on the carding machine cylinder 13, some fibers are removed by a doffer 15, delivered to a sliver forming unit 16, and finally stored in the form of a carding machine sliver 17 in a sliver cartridge (not shown in the drawing). As shown in FIG. 1 and FIG. 2, the fiber bundle in the filling channel 2 is delivered to the opening roller 7 by means of the feeding roller 6. In order to ensure that the fiber bundle is quantitatively acquired from the filling channel 2, the feeding roller 6 cooperates with a feeding slot 18. The fiber bundle received from the feeding roller 6 is delivered into the feeding duct 3 by the opening roller 7. While doing do, the fiber bundle is thrown off by needles of the opening roller 7 due to centrifugal force generated by rotation of the opening roller 7 around a roller shaft 31 thereof. As a result, the fiber bundle is caught by the air flow, and is delivered in a flow direction 29 through the feeding duct 3. The air flow 8 is generated by a fan 23, and is delivered to the feeding duct 3 by means of an air supply duct 28. An air-permeable region is provided on an upper wall of the feeding duct 3, and is specifically one air separator 9. The air flow is acquired from the feeding duct 3 again by means of the air separator 9, and is then returned to the fan 23 by means of an air duct 30. The air separator 9 is designed to be in the shape of comb teeth, as shown in FIG. 3. The air flow passes through gaps between the teeth. Some gradually shortening teeth are provided on two ends of the air separator 9. Such a shape can result in a good and stable air flow, thereby avoiding some clogging.

[0031] As shown in FIG. 2 and FIG. 3, the air supply duct 28 is comprised of a first component 20 and a second component 21 . The first component 20 is designed to be a diffuser, and is connected to the fan 23. A regulating valve 19 is provided between the first component 20 and the second component 21 of the air supply duct 28. An air flow control plate 24 is provided in a region on the second component 21 close to the opening roller 7. The air flow control plate 24 is connected to an upper wall opposite a lower wall 22 of the second component 21 , and is optionally also connectable to a cover 27 of the opening roller 7, thereby forming a closed structure. The air flow control plate 24 changes the size of an air flow opening A of the second component 21 . The air flow 8 passing along the air flow control plate 24 is restricted thereby, and then passes along the opening roller 7 to arrive at the feeding duct 3. The air flow control plate 24 is configured such that the air flow control plate 24 and the air flow opening A of the lower wall 22 of the second component 21 are adjustable. Distance adjustment is performed by means of an adjustment element 26. The adjustment element 26 is preferably a screw. Rotating the screw can cause the air flow control plate 24 to slide upwards or downwards, i.e. , sliding upwards or downwards along the double-sided arrow shown in FIG. 2. Rotation of the screw in the clockwise direction may be defined as a first direction, so that when the screw rotates in the first direction, the air flow control plate 24 slides upwards, thereby increasing the air flow opening A of the second component 21 . Rotation of the screw in the counterclockwise direction is defined as a second direction, so that when the screw rotates in the second direction, the air flow control plate 24 slides downwards, thereby reducing the air flow opening A of the second component 21 . In this case, the air flow control plate may be a sliding air flow control plate. The air flow control plate 24 and the second component 21 may be placed to form an angle a, as shown in FIG. 2. The angle a is between 20° and 60°, preferably between 30° and 50°, and in particular between 40° and 50°. The air flow control plate 24 may further comprise a winglet 25. The winglet 25 is formed at the bottom of the air flow control plate 24, has a guide surface opposite the lower wall 22 of the second component 21 , and is used to guide the air flow. The winglet 25 is configured to improve the air flow 8 in the second component 21. The winglet 25 and the second component 21 are configured to form an angle [3. That is, the guide surface of the winglet 25 and the lower wall 22 of the second component 21 form the angle [3. The angle [3 is between 2° and 30°, preferably between 5° and 25°, and in particular between 10° and 20°. The air flow control plate 24 configured in this manner can guide and improve the air flow 8 in the second component 21 , and stabilize the air flow over the entire working width, thereby preventing a turbulent flow or turbulence, and so on.

[0032] FIG. 3 shows a schematic diagram of the air supply duct 28 of the filling channel output device 5 according to the present invention. FIG. 3 is a partial view of the air supply duct 28 of FIG. 2 in a direction X. The air supply duct 28 is comprised of the first component 20, the second component 21 , and the regulating valve 19 arranged therebetween. The first component 20 is designed to be a diffuser. The diffuser reduces in one dimension from a flange cross-section of the fan 23 to a height H, and widens in another dimension to a width C. The width C corresponds to the axial length of the opening roller 7 or the width of the feeding duct 3. The air separator 9 in the shape of comb teeth isolates the fiber bundle in the feeding duct 3 from the air duct 30, and air in the feeding duct 3 passes through the gaps between the teeth of the air separator 9 and enters the air duct 30. The air duct 30 spans the entire working length. FIG. 4 and FIG. 5 show side views of another embodiment of the filling channel output device according to the present invention. The embodiment is substantially structurally the same as the first embodiment shown in FIG. 2. The same components are represented by the same reference numerals herein, and the structures and functions thereof are the same as those in the first embodiment, so details will not be described herein again. The difference lies in that the air flow control plate 24 is no longer adjusted by means of the adjustment element 26. A raising element 32 is provided between the air flow control plate 24 and the second component 21 , and the height of the air flow control plate 24 is adjusted by means of the raising element 32, thereby adjusting the size of the air flow opening A. The raising element 32 is preferably at least one strip, and the thickness thereof is, for example, 1 mm, and stacking three strips achieves 3 mm. The air flow opening A between the air flow control plate 24 and the wall 22 can be adjusted by increasing or decreasing the number of strips. The air flow control plate 24 and the raising element 32 are fixed to the second component 21 by means of screw nuts 33.

[0033] Preferably, the length of the at least one raising element 32 is less than the length of the air flow control plate 24, and in particular, the length of the at least one raising element is less than or equal to half the length of the air flow control plate 24. As shown in FIG. 5, the length of the raising element 32 is half the length of the air flow control plate 24, so that two raising elements 32 are present in a working length direction of the air flow control plate 24. It is thus preferred that the number of raising elements on each side of the air flow control plate 24 is different. As shown in FIG. 5, one side is provided with three raising elements, and the other side is provided with two raising elements. The numbers of increase elements on the two sides are different, so that the sizes of air flow openings A on the two sides are different. In this case, air may be correspondingly guided to one side.

[0034] It is conceivable that the raising elements may further be incorporated into the technical solution of a slidably disposed air flow control plate, and in the combined new technical solution, the air flow control plate may be adjusted by means of the adjustment element and / or the raising elements. Particularly when the numbers of raising elements on the two sides are different, the sizes of the air flow openings A on the two sides are differ- ent, so that the air flow can be better guided as desired, thereby reducing the risk of turbulence and clogging.

[0035] Although the objective, technical solutions, and beneficial effects of the present invention have been described in further detail with reference to the above specific embodi- ments, it should be understood that the above description merely shows specific embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

CLAIMS1 . A filling channel output device (5) for a carding machine, said device being used to supply a fiber bundle (4) from a filling channel (2) of a carding machine (1 ) into a feeding duct (3), being provided with an opening roller (7) having a shaft (31 ) and an axial working length, being provided with a feeding roller (6) upstream from the opening roller (7), and being provided with an air supply duct (28) comprising a first component (20) and a second component (21 ), and being characterized in that the air supply duct (28) comprises an air flow control plate (24) configured to change an air flow (8) in the second component (21 ).

2. The filling channel output device for a carding machine according to claim 1 , wherein the air flow control plate (24) is configured to be adjustable by an adjustment element (26), the adjustment element (26) preferably being a screw, and / or the air flow control plate (24) is configured to be adjustable by a raising element (32), the raising element (32) preferably being at least one strip, and being configured to adjust the height of the air flow control plate (24).

3. The filling channel output device for a carding machine according to claim 2, wherein the length of the at least one raising element (32) is less than the length of the air flow control plate (24), and preferably, the length of the at least one raising element (32) is less than or equal to half the length of the air flow control plate (24).

4. The filling channel output device for a carding machine according to claim 3, wherein the number of the at least one raising element (32) on each side of the air flow control plate (24) is different.

5. The filling channel output device for a carding machine according to any one of claims 1 to 4, wherein the adjustment element (26) is configured to rotate in a first direction to slide the air flow control plate (24) upwards to increase an opening of the second component (21 ), and rotate in a second direction to slide the air flowcontrol plate (24) downwards to decrease the opening of the second component (21 ).

6. The filling channel output device for a carding machine according to any one of claims 1 to 3, wherein the air flow control plate (24) and the second component (21 ) form an angle a therebetween, and the angle a is between 20° and 60°, preferably between 30° and 50°, and in particular between 40° and 50°.

7. The filling channel output device for a carding machine according to any one of claims 1 to 4, wherein the air flow control plate (24) comprises a winglet (25), and the winglet (25) is used to change the air flow in the second component (21 ).

8. The filling channel output device for a carding machine according to claim 7, wherein the winglet (25) and the second component (21 ) form an angle (3, and the angle [3 is between 2° and 30°, preferably between 5° and 25°, and in particular between 10° and 20°.

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