carding machine

Abstract

The invention relates to a carding machine having a feed side for fiber bundles, wherein the carding mechanism is configured to deliver the fiber bundles to a rotating cylinder (4) by means of at least one licker-in (3a, 3b, 3c), wherein the fiber bundles are opened into individual fibers, aligned and cleaned between stationary carding elements and surrounding flat strips (17) and the cylinder (4), and the fiber web produced there can be transferred from the cylinder (4) to a doffer (5), downstream of which a device for converting the fiber web into a fiber sliver is arranged. The invention is characterized in that the diameter of the cylinder (4) is at least 1300 mm and the difference between the front heel and the rear heel (Fv-Fh) of the wire (17a) of the flat strips (17) over a width of 20 mm is less than 12 / 1000" [inches] relative to the spacing of the wire of the cylinder (4).

Description

Technical Field

[0001] This invention relates to a carding machine having a feed side for a fiber bundle, wherein the carding mechanism is configured to convey the fiber bundle to a rotating cylinder via at least one licker-in roller. On the cylinder, the fiber bundle is loosened, oriented, and cleaned into individual fibers between a fixed carding element and a surrounding cover strip. The resulting fiber web is transferred from the cylinder to a doffer, downstream of which a device is arranged for transforming the fiber web into fiber strips. Background Technology

[0002] According to existing technology, some rotary carding machines are known, which basically have a large main cylinder, cylinder, or roller on which fibers are carded by a certain number of rotating zippers and fixed carding elements. The working part for supplying material is the licker-in roller, and the working part for discharging material is the doffer. The carding length, and especially the working of the zipper strips surrounding the rotating zipper, has a significant impact on the carding quality. The carding area and cylinder speed, in turn, play a decisive role in the productivity of the carding machine. It is possible to increase the cylinder speed, where a fairly high centrifugal force is generated, causing the cylinder to deform into a convex shape. Therefore, if a constant carding gap is specified for the center of the cylinder, the carding gap relative to the cylinder edge will become larger. Another disadvantage of increasing the cylinder speed is the associated heating and thermal expansion of the cylinder, as the fiber speed between the cylinder and the carding elements increases, leading to increased friction. For rotary carding machines, cylinders with a diameter less than D=1300mm are typically used. To increase the carding length around such a cylinder, a common method is to move the licker-in roller and / or doffer further below the cylinder. This increases the available circumferential length, allowing for the installation of an additional desired number of swivel covers.

[0003] If these rollers move so far that they almost touch at their respective attachments, then the method has limitations. This method inevitably leads to two mutually influential drawbacks:

[0004] The cylinder must be positioned quite high in the machine, at least high enough to be above the doffer. The doffer typically has a fairly large diameter in the range of D=700mm, therefore, a large cylinder must be positioned quite high. The higher the heavy, high-speed cylinder is positioned, the worse its operational and vibration stability becomes, especially at around 600U / min. The supporting frame must also be correspondingly large and robustly constructed and cannot be too thin.

[0005] Accessibility for frequent (sometimes routine) cleaning or maintenance is severely limited. Depending on the structural design, this may even necessitate complex, track-guided mobility for the licker roller unit.

[0006] These two drawbacks increase manufacturing costs and make maintenance difficult.

[0007] EP 3162927A1 discloses a carding machine with a carding length greater than 3000 mm, wherein the cylinder diameter is between 1150 mm and 1250 mm. Increasing the carding length is achieved by moving the licker-in and doffer below the cylinder. The cylinder rotation speed is specified to be in the range of 500 to 600 rpm. Therefore, the number of fixed carding elements and cover strips used in the carding process can be increased. The disadvantage is the increased structural height.

[0008] EP 2527505 discloses a rotary carding machine that proposes a specific geometric arrangement of the licker-in rollers and doffers to achieve high productivity. Here, the entire geometry is oriented according to the horizontal direction of the carding machine. The disadvantage of this device is that the arrangement of the licker-in rollers and doffers results in a very high structural height of the carding machine, and it does not utilize the possible transport path on the cylinder. The diameter of the cylinder reaches 1200 mm.

[0009] A similar "elevated" carding machine is described in document IN351271B, featuring a cylinder diameter of up to 1100 mm and at least 36 surrounding cover strips that are always in operation. This document clearly demonstrates the relationship between cylinder size, thermal expansion, and centrifugal force at a constant rotational speed, indicating that starting from a cylinder diameter of 1287 mm, the disadvantages outweigh the advantages. Summary of the Invention

[0010] Accordingly, the objective of the present invention is to improve the carding machine in such a way that the carding length is increased without producing the disadvantages mentioned above.

[0011] The present invention solves the proposed task by means of a device according to the invention.

[0012] This invention relates to a carding machine having a feed side for a fiber bundle, wherein the carding mechanism is configured to convey the fiber bundle to a rotating cylinder via at least one licker-in roller. On the cylinder, the fiber bundle is loosened, oriented, and cleaned into individual fibers between a fixed carding element and a surrounding cover strip. The resulting fiber web is transferred from the cylinder to a doffer, downstream of which a device is arranged for transforming the fiber web into fiber strips.

[0013] This invention is based on the following technical teachings: the cylinder diameter is at least 1300 mm, and the difference in the spacing between the front and rear heels of the cardioids on the flat surface of the cover strip relative to the cylinder cardioids over a width of 20 mm is less than 12 / 1000'' [inches], i.e., 0.30 mm. Due to the increased radius of curvature, the combing surface between the cover strip and the cylinder further approaches the ideal state of a linear combing surface, and the combing gap becomes constant across the width of the cover strip. This spacing difference can be achieved even if the cardioids are narrower or wider, for example, 25 mm or 30 mm. In this case, the spacing difference is determined at a measurement distance of 20 mm, even if the width of the cardioids is smaller or larger. Combing strength is improved regardless of the length of the combing surface. While all those skilled in the art consider the size of the combing cylinder to be technically feasible and reasonable only when it is significantly less than 1300 mm, according to this invention, by increasing the radius of curvature of the cylinder, the combing surface between the cover strip and the cylinder further approaches the ideal state of a linear combing surface, and the combing gap becomes constant across the width of the cover strip. By increasing the cylinder diameter to at least 1300 mm, the gap difference between the front and rear heels of the carding cloth in the cover strip is reduced by at least 4 / 1000'' (0.1 mm) compared to the prior art, thereby improving carding efficiency and quality without requiring higher power. Conversely, the carding machine can operate with reduced drive power because, compared to the prior art, with the increased diameter, the cylinder body can be accelerated to and operated at a lower speed. Another advantage is the larger surface area of ​​the cylinder, thus allowing for greater heat dissipation and less deformation upon heating. The main dimensions of the carding machine are determined by the change in cylinder diameter along with the carding length.

[0014] Combining the cylinder diameter mentioned earlier, the carding length can be at least 3170 mm, determined by the sub-circumferential surface of the cylinder between the contact point between the licker-in and the cylinder and the contact point between the cylinder and the doffer. This increases carding strength without having to move the licker-in and doffer below the cylinder, which would have made the carding machine's operating characteristics unstable and increased its structural size. The disadvantage of the prior art, namely the vibration associated with the increased structural height, is compensated for by the arrangement of the licker-in and doffer. Because the arrangement of these rollers is almost identical to the applicant's previous carding machine in terms of the circumferential angle range, neither vibration and unstable operation are generated, nor is the structural height of the carding machine significantly increased.

[0015] If the cylinder diameter is increased while maintaining a similar carding length, a more advantageous arrangement of the licker-in roller and cylinder is achieved, resulting in only a slight increase in the structural height of the carding machine. Simultaneously, the gap difference between the carding cloth of the cover strip and the carding cloth of the cylinder decreases.

[0016] If the cylinder diameter is increased to at least 1400 mm, the gap difference at the needle cloth of the cover plate strip is further reduced. The maximum difference in the distance between the front and rear needle cloths of the cover plate strip relative to the needle cloth of the cylinder over a width of 20 mm is 11 / 1000'' [inch], or 0.28 mm. This gap difference can be obtained even if the needle cloth is wider or narrower, for example, 25 mm or 30 mm wide. In this case, the gap difference is determined at a measurement distance of 20 mm width, even if the width of the needle cloth is smaller or larger.

[0017] Ensure combing efficiency and quality while reducing drive power when the relevant combing length is at least 3190mm.

[0018] This invention is based on a carding machine having a feed side for a fiber bundle, wherein the carding mechanism is configured to feed the fiber bundle to a rotating cylinder via at least one licker-in roller. Here, the fiber bundle is loosened into individual fibers, oriented, and cleaned between a fixed carding element and a surrounding cover strip. The resulting fiber web is transferred from the cylinder to a doffer, and a device is arranged downstream of the doffer for turning the fiber web into fiber strips. The invention specifies that the cylinder diameter is at least 1300 mm and the carding length is at least 3170 mm, the carding length being determined by the sub-circumferential surface of the cylinder between the contact point between the licker-in roller and the cylinder and the contact point between the cylinder and the doffer.

[0019] By increasing the cylinder diameter beyond the limits set by professionals, the carding length can be increased. This carding length is determined by the sub-circumferential surface of the cylinder between the contact point between the licker-in and the cylinder and the contact point between the cylinder and the doffer. This increases carding strength without moving the licker-in and doffer below the cylinder, which makes the carding machine's operating characteristics unstable and increases its structural size. The disadvantage of the prior art, namely the vibration associated with the increased structural height, is compensated for by the arrangement of the licker-in and doffer. Because the arrangement of these rollers is almost identical to the applicant's previous carding machine in terms of the circumferential angle range, neither vibration and unstable operation are generated, nor is the structural height of the carding machine significantly increased.

[0020] Another improvement can be achieved by ensuring that the difference in spacing between the front and rear heels of the carding cloth on the flat surface of the cover strip, relative to the carding cloth of the cylinder, over a width of 20 mm, is less than 12 / 1000'' [inches], or 0.30 mm. Due to the increased radius of curvature of the cylinder, the carding surface between the cover strip and the cylinder further approximates the ideal state of a linear carding surface, and the carding gap becomes constant across the width of the cover strip. This spacing difference can be achieved even if the carding cloth is narrower or wider, for example, 25 mm or 30 mm. In this case, the spacing difference is determined at a measurement distance of 20 mm, regardless of the length of the carding surface. This improves carding strength regardless of the length of the carding surface.

[0021] The combing strength can also be increased by increasing the cylinder diameter to at least 1400 mm, so that the combing length is at least 3190 mm with the same arrangement of licker-in rollers and doffers.

[0022] The combing strength is further improved when the difference in spacing between the front and rear heels of the cardioids on the flat surface of the cover strip, relative to the cardioids of the cylinder, is at most 11 / 1000'' [inch], or 0.28mm, over a width of 20mm. This spacing difference can be achieved even if the cardioids are wider or narrower, for example, 25mm or 30mm. In this case, the spacing difference is determined at a measurement distance of 20mm, regardless of whether the cardioids are wider or narrower.

[0023] By increasing the size of the cylinder, at least 38 cover strips of the surrounding rotating cover plate can continuously interact with the cylinder. Increasing the number of active cover plates allows for better heat dissipation from the combing process. This, in turn, improves combing efficiency and quality.

[0024] The surrounding rotary cover is arranged symmetrically about the vertical centerline of the axis passing through the cylinder, thus providing additional advantages for the structural height of the carding machine, because despite the increased carding length, the licker-in roller and doffer no longer need to be arranged below the cylinder. Similarly, heat is dissipated more evenly due to the increased carding efficiency.

[0025] Preferably, the circumferential angle formed by the carding length between the contact point of the licker-in roller and the cylinder and the contact point of the cylinder and the doffer is at most 280°, and more preferably at most 270°. Because, according to the invention, the carding length is increased by increasing the cylinder diameter, the limited circumferential angle ensures a low structural height for the carding machine, since the licker-in roller and the cylinder cooperate with the cylinder almost at their previous positions.

[0026] Because the licker-in roller and doffer are positioned almost exactly as before relative to the cylinder, the maximum height between the bottom side of the frame and the cylinder axis is 1230 mm. Therefore, it is advantageous that the previous frame configuration can be continued using only minor adjustments to the supports.

[0027] The cylinder's maximum working width is 1300mm, thus the impact of heat load on cylinder gap changes is smaller compared to existing technologies. In particular, combined with the increased cylinder diameter, centrifugal force can be reduced, allowing the cylinder to operate at a lower speed while maintaining the same productivity.

[0028] Therefore, the carding machine is preferably configured to allow the cylinder to run at a maximum circumferential speed of 2450 m / min, thereby reducing the drive power and simultaneously limiting the centrifugal force.

[0029] As the cylinder diameter increases, the symmetrical arrangement of the enlarged rotary cover and the currently almost unchanged position of the licker-in roller relative to the cylinder allow for an increase in the pre-carding area. This allows the pre-carding area to accommodate additional cleaning elements, with or without a suction shroud with a cutter, or additional fixed carding elements. Although the circumferential angle of the pre-carding area decreases due to the increased rotary cover, the arc of the pre-carding area on the cylinder circumference increases to at least 900 mm due to the larger cylinder diameter. This further reduces the load on the rotary cover's cover circuit, improving the service life of the cover strip's carding cloth and enhancing carding quality. According to the prior art, eight cleaning elements are arranged between the suction shroud and the licker-in roller below the rotary cover. The diagonal arc of the pre-carding area increases to at least 900 mm, where the diagonal arc in the pre-carding area is defined by the distance from the center of the licker-in roller acting on the cylinder to the center of the rotary cover's steering roller. Therefore, the elements in the pre-carding area can be increased along the diagonal circumference, or additional cleaning elements or fixed carding elements can be used. Attached Figure Description

[0030] Other measures to improve the invention are described in more detail below with the aid of the accompanying drawings, together with the description of preferred embodiments of the invention.

[0031] In the picture:

[0032] Figure 1 A side view of a combing machine, schematically illustrated according to the prior art, is shown;

[0033] Figures 2a-2c Other combing machines are shown schematically according to the prior art;

[0034] Figure 2d The present invention is illustrated schematically as a combing machine;

[0035] Figure 3 An enlarged view of the cover bar, along with the curvature of the cylinder, is shown;

[0036] Figure 4 Showing an enlarged view of the pre-combing area;

[0037] Figure 4a A magnified detailed view of the licker-in roller area is shown. Detailed Implementation

[0038] The solutions according to the present invention include different combinations of features, particularly defined by the following sequentially numbered embodiments:

[0039] 1. A carding machine having a feeding side for a fiber bundle, wherein the carding mechanism causes the fiber bundle to be conveyed to a rotating cylinder (4) by means of at least one licker roller (3a, 3b, 3c), wherein the fiber bundle is loosened into individual fibers, oriented and cleaned between a fixed carding machine element and an encircling cover strip (17) and the cylinder (4), and the resulting fiber web can be transferred from the cylinder (4) to a doffer (5), wherein a device for converting the fiber web into a fiber strip is arranged downstream of the doffer, characterized in that the diameter of the cylinder (4) is at least 1300 mm and the difference between the front and rear heels (Fv-Fh) of the carding cloth (17a) of the plane of the cover strip (17) and the spacing of the carding cloth relative to the carding cloth of the cylinder (4) is less than 12 / 1000'' [inches] over a width of 20 mm.

[0040] 2. The carding machine according to embodiment 1, characterized in that the carding length (KL) is at least 3170 mm, the carding length being determined by the sub-circumferential surface of the cylinder (4) between the contact point between the licker-in roller (3c) and the cylinder (4) and the contact point between the cylinder (4) and the doffer (5).

[0041] 3. The carding machine according to embodiment 1 is characterized in that the diameter of the cylinder (4) is at least 1400 mm and the difference between the front and back heels (Fv-Fh) of the card cloth (17a) of the plane of the cover strip (17) and the spacing of the card cloth relative to the cylinder (4) over a width of 20 mm is at most 11 / 1000'' [inches].

[0042] 4. The carding machine according to embodiment 3, characterized in that the carding length (KL) is at least 3190 mm.

[0043] 5. A carding machine having a feeding side for fiber bundles, wherein the carding mechanism causes the fiber bundles to be conveyed to a rotating cylinder (4) by means of at least one licker roller (3a, 3b, 3c), wherein the fiber bundles are loosened into individual fibers, oriented and cleaned between the fixed carding machine elements and the surrounding cover strip (17) and the cylinder (4), and the resulting fiber web can be transferred from the cylinder (4) to a doffer (5), wherein a device for converting the fiber web into fiber strips is arranged downstream of the doffer, characterized in that the diameter of the cylinder (4) is at least 1300 mm and the carding length (KL) is at least 3170 mm, the carding length being determined by the sub-circumferential surface of the cylinder (4) between the contact point of the licker roller (3c) and the cylinder (4) and the contact point of the cylinder (4) and the doffer (5).

[0044] 6. The carding machine according to embodiment 5 is characterized in that the difference between the front and rear heels (Fv-Fh) of the card cloth (17a) of the plane of the cover strip (17) and the spacing of the card cloth of the cylinder (4) over a width of 20 mm is less than 12 / 1000'' [inches].

[0045] 7. The carding machine according to embodiment 5, characterized in that the diameter of the cylinder (4) is at least 1400 mm and the carding length (KL) is at least 3190 mm.

[0046] 8. The carding machine according to embodiment 7 is characterized in that the difference between the front and rear heels (Fv-Fh) of the card cloth (17a) of the plane of the cover strip (17) and the spacing of the card cloth of the cylinder (4) is at most 11 / 1000'' [inches] over a width of 20 mm.

[0047] 9. The combing machine according to one of the above embodiments, characterized in that at least 38 cover strips (17) of the surrounding rotary cover (16) continuously interact with the cylinder (4).

[0048] 10. The combing machine according to embodiment 9 is characterized in that the surrounding rotary cover plate (16) is arranged symmetrically about the vertical center line of the axis passing through the cylinder (4).

[0049] 11. The carding machine according to one of the above embodiments is characterized in that the circumferential angle formed by the carding length (KL) between the contact point of the licker-in roller (3c) and the cylinder (4) and the contact point of the cylinder (4) and the doffer (5) is at most 280°, preferably at most 270°.

[0050] 12. The combing machine according to one of the above embodiments, characterized in that the front combing area (VK) has at least one diagonal arc of at least 900 mm on the cylinder circumferential surface.

[0051] 13. The combing machine according to embodiment 12, characterized in that the front combing area is configured to accommodate at least nine cleaning elements.

[0052] 14. The combing machine according to one of the above embodiments is characterized in that the maximum height between the bottom side of the frame (18) and the axis of the cylinder (4) is 1230mm.

[0053] 15. The combing machine according to one of the above embodiments is characterized in that the working width of the cylinder (4) is up to 1300 mm.

[0054] 16. The carding machine according to one of the above embodiments is characterized in that the carding mechanism causes the cylinder (4) to run at a maximum circumferential speed of 2450 m / min.

[0055] Figure 1 The diagram illustrates a carding machine according to the prior art, in which fiber bundles are guided through a channel to a feed roller 1 and a feed plate 2, and then guided via multiple sucker rollers 3a, 3b, and 3c to a cylinder 4 or a drum. On the cylinder 4, the fibers of the fiber bundle are made parallel and cleaned by means of fixed, surrounding carding elements. Subsequently, the resulting fiber web is conveyed by a doffer 5, a stripping roller 6, and multiple squeeze rollers 8 and 9 to a fiber web guiding element 10, which, by means of a gathering bell 11, transforms the fiber web into fiber slivers. The fiber slivers are then passed through separating rollers 12 and 13 to subsequent processing equipment or a sliver can 15. The fibers are removed from the doffer 5 with the aid of a fiber web guiding section 7 arranged below the stripping roller 6. A cleaning roller 6a is arranged above the stripping roller 6, thereby removing fiber residue from the stripping roller 6 and conveying it to a suction device (not shown).

[0056] Figure 2a The diagram illustrates a carding machine, sold under the product name TC19. This carding machine has a cylinder diameter of 1287 mm (without needle cloth) and a working width of 1280 mm. The rotary cover plate 16 has a total of 84 cover strips 17, of which 28 strips continuously interact with the needle cloth of the cylinder 4. The carding length KL (= diagonal arc) is 2800 mm on the cylinder circumference, corresponding to an effective circumferential angle of 250° between the center of the licker-in roller 3c and the center of the doffer 5. At a maximum rotational speed of approximately 600 m / min, the maximum circumferential speed is 2450 m / min. The carding length KL consists of a front carding zone VK, a main carding zone HK, and a rear carding zone NK. The front carding zone VK is defined by a diagonal circumference on the cylinder 4 located between the center of the licker-in roller 3c and the center of the turning roller 16a of the rotary cover plate. The main carding region HK corresponds to the cover plate running surface of the rotary cover plate 16 with rotary cover plate 17 on the cylinder 4, which is defined by the diagonal circumference between the centers of the guide rollers 16a and 16b on the cylinder circumference. The diagonal circumference of the rear carding region NK extends from the center of the guide roller 16b to the center of the doffer 5 on the cylinder circumference.

[0057] Figure 2bThe diagram illustrates a schematic geometry of a carding machine according to the prior art, which has a relatively small cylinder diameter of 1180 mm and a working width of 1500 mm. The rotating cover plate 16 has a total of 116 cover strips 17, of which 40 strips continuously interact with the carding cloth of the cylinder 4. The carding length KL (= diagonal arc) on the cylinder circumference is 3160 mm, corresponding to an effective circumferential angle of 307° between the center of the licker-in roller 3c and the center of the doffer 5. At a maximum rotational speed of 600 U / min, the circumferential speed is approximately 2224 m / min. The working width is increased to 1500 mm compared to the prior art, but a disadvantage is that heat has a greater impact on the carding gap because the cylinder 4 becomes convex with increasing temperature. Despite the small diameter of the cylinder 4, the structure of this carding machine is quite tall because the licker-in roller 3c and the doffer 5 are moved below the cylinder 4 to increase the carding length. The frame 18 is also designed accordingly, resulting in a higher mounting height for the cylinder 4 compared to the prior art. Because the licker-in roller 3c and the doffer 5 are arranged low, space is provided to pull the rotary cover 16 down into the area of ​​the licker-in roller 3c, where this circumferential area on the cylinder is currently used in conjunction with the fixed combing element, suction hood, and rejection element. This implementation is described in document EP 3162927A1.

[0058] Another combing machine geometry based on existing technology is... Figure 2c As shown, the cylinder 4 has a diameter of 1017 mm and a working width of 1500 mm. The rotary cover plate has a total of 101 cover strips, of which 36 cover strips continuously interact with the carding cloth of the cylinder 4. The carding length KL (= diagonal arc) is 2620 mm, which corresponds to an effective circumferential angle of 295° between the center of the licker-in roller 3c and the center of the doffer 5. This embodiment is described in document IN 351271B.

[0059] The present invention avoids the current disadvantages by using a combing machine, wherein the cylinder diameter is at least 1300 mm, preferably at least 1350 mm, while the working width is still maintained at 1280 mm.

[0060] Figure 2dA schematic embodiment of the carding machine according to the invention is shown, with a cylinder diameter of 1400 mm. The carding length KL is 3190 mm, corresponding to an effective circumferential angle of 261° between the center of the licker-in roller 3c and the center of the doffer 5. In this embodiment, the rotating cover plate 16 has a total of 105 cover strips 17, of which 38 cover strips continuously interact with the carding cloth of the cylinder 4. Here, the active cover strips 17 are symmetrically distributed about a centerline perpendicular to the cylinder axis, so that the carding heat is also symmetrically dissipated about the circumference of the cylinder. The increase in carding length KL is achieved by increasing the cylinder diameter, thereby keeping the arrangement of the licker-in roller 3c and the doffer almost unchanged. The frame 18 can maintain its support structure width without restricting the structural space of the licker-in roller 3c and the doffer 5. Thus, in the case where the cylinder diameter is at least 1300 mm, a maximum height H of 1230 mm is maintained from the lower side of the frame to the cylinder axis. Another significant advantage is the increased radius of curvature, which brings the combing surface between the cover bar 17 and the cylinder 4 closer to the ideal state of a linear combing surface. The combing gap becomes more constant across the width of the cover bar 17.

[0061] Figure 3 An enlarged view of a cover strip 17 with needle cloth 17a is shown, the distance between the heel Fh of the needle cloth and the needle cloth (not shown) of the cylinder 4 is set to 3 / 1000'' [inch], or 0.076 mm. For the table below, in this embodiment, all cover strips 17 have a uniform planar dimension of 20 mm across the width of the needle cloth 17a. Dimension X is derived at the heel Fv of the needle cloth 17a by the curvature of the cylinder 4, and this dimension varies with the curvature of the cylinder 4.

[0062]

[0063] The first value based on the prior art shows an example of a known carding machine on the market, in which the cylinder diameter is 800 mm and the gap X is 23 / 1000'' [inch], or 0.7 mm.

[0064] Other values ​​for gap X are related to: Figure 2c For example, 19 / 1000'' [inches] (0.48mm), while the cylinder diameter is 1017mm; Figure 2b For example, X = 16 / 1000'' [inches] (0.41 mm), while the cylinder diameter is 1180 mm; and Figure 2a For example, X = 15 / 1000'' [inches] (0.38 mm), while the cylinder diameter is 1287 mm.

[0065] Finally, it can be seen that when the cylinder 4 is increased to at least 1300 mm according to the present invention, the dimension X at the front heel Fv of the card cloth 17a will be further reduced, i.e., less than 15 / 1000'' [inch] (0.38 mm), and even to 14 / 1000'' [inch] (0.356 mm) in the 1400 mm embodiment. Therefore, regardless of how the combing gap is set (here, 3 / 1000''), when the diameter of the cylinder 4 is 1300 mm, the difference between the distance between the front heel (Fv) of the card cloth 17a with a plane width of 20 mm and the distance between the card cloth of the cylinder 4 and the distance between the rear heel (Fh) and the card cloth of the cylinder 4 is less than 12 / 1000'' [inch] (0.3 mm), and when the diameter of the cylinder 4 is 1400 mm, the difference is 11 / 1000'' [inch] (0.28 mm). Even if the needle cloth is narrower or wider, for example, 25mm or 30mm wide, the dimension X can still be obtained. However, in this case, even if the width of the needle cloth is smaller or larger, the dimension X is still obtained at a measurement distance of 20mm.

[0066] Increasing the cylinder diameter allows for a higher circumferential speed at the same rotational speed, resulting in a decrease in carding quality for some (but not all) fiber qualities. Simultaneously, centrifugal force also increases. Therefore, the cylinder rotational speed is limited to a circumferential speed not exceeding 2450 m / min. For this reason, it is advantageous to limit the rotational speed of cylinder 4 to 560 U / min, for example, with a cylinder diameter of 1400 mm. Thus, even with heavy loads, not only is energy saved, but the carding machine also operates more smoothly due to the reduced rotational speed caused by the limitation of centrifugal force.

[0067] Meanwhile, by increasing the number of active cover strips to 38, heat based on combing efficiency is better dissipated. Increasing the cylinder diameter also limits the heat load and thus the deformation of cylinder 4, as the cylinder has a larger surface area for heat dissipation, and convex deformation is reduced.

[0068] By implementing the measures according to the present invention, the carding quality is improved, and the known negative effects caused by high cylinder speeds and associated temperature differences are reduced. Therefore, carding quality and the associated yarn quality are improved. Consequently, raw material costs can be saved or productivity increased. Alternatively, carding intensity can be reduced, and the potential quality gains can be converted into energy savings.

[0069] use Figure 4 and Figure 4aThe details of the pre-carding region VK are shown. Due to the increased cylinder diameter, the pre-carding region also increases in arc length, as the symmetrical arrangement of the rotary cover 16 and the almost unchanged current position of the licker-in roller 3c relative to the cylinder 4 remain constant. Although the angle or diagonal arc of the pre-carding region decreases slightly, the usable arc length of the pre-carding region VK on the cylinder circumference increases to at least 900 mm due to the increased cylinder diameter. The cylinder 4 is supported between the two side guards 20 of the carding machine (only one is visible here), and a curved rail 21 is respectively mounted on the outer side of the side guards 20. The curved rails are adjustable in radius relative to the cylinder 4 by means of fastening elements 22. Cleaning elements or other cleaning elements, such as suction hoods 23, 27, fixing carding elements 24, wedge profiles 26, and covering elements 25, are arranged on the curved rails 21. By increasing the cylinder diameter, the diagonal arc of the pre-carding region on the cylinder circumference can be increased while the licker-in rollers are arranged in the same and symmetrical manner as the enlarged rotary cover 16. Therefore, the diagonal arc of the pre-carding region VK is increased, and it can accommodate additional cleaning elements with or without the suction shroud 27, or additional fixed carding elements 24. This further reduces the load on the cover circuit of the rotary cover 16, which improves the service life of the card cloth on the cover strip 17 and enhances carding quality. According to the prior art, eight cleaning elements are arranged between the suction shroud 23 and the licker-in roller 3c below the rotary cover 16. The diagonal arc of the pre-carding region on the cylinder circumference is increased to at least 900 mm, wherein the diagonal arc in the pre-carding region VK is determined by the distance from the center of the licker-in roller 3c acting on the cylinder 4 to the center of the turning roller 16a of the rotary cover 16. Therefore, the elements of the pre-carding region can be increased along the diagonal circumference, or additional cleaning elements or fixed carding elements can be used. Figure 4 In the middle, no additional components have been assembled yet; instead, a simple covering element 25 is used there. Figure 4a In this process, the covering element 25 is replaced by the fixed combing element 24, thereby performing additional combing. Instead of the fixed combing element 24, a suction mask or other cleaning element with or without a cleaver may also be used.

[0070] List of reference numerals

[0071] 1. Feed Lola

[0072] 2 feed plate

[0073] 3a, b, c Zipper rollers

[0074] 4 Xilin

[0075] 5 dolf

[0076] 5a needle cloth

[0077] 6. Peeling Laura

[0078] 6a cleaning roller

[0079] 7 Fiber mesh guide section

[0080] 8 extrusion rollers

[0081] 9 extrusion rollers

[0082] 10 Fiber mesh guiding elements

[0083] 11-bell mouth

[0084] 12 Separation Rolla

[0085] 13 Separation Rolla

[0086] 14 Fixed combing elements

[0087] 15 tubes

[0088] 16-turn cover plate

[0089] 17 Cover Strip

[0090] 17a needle cloth

[0091] 18 racks

[0092] 20 side guards

[0093] 21 curves

[0094] 22 Fastening components

[0095] 23 suction shields

[0096] 24 fixed combing elements

[0097] 25 Covering elements

[0098] 26 wedge profile

[0099] 27 suction shield

[0100] Fh heel

[0101] Fv front heel

[0102] H height

[0103] HK main area sorting

[0104] Post-NK combo area

[0105] VK front combing area

[0106] KL comb length

[0107] X-gap

Claims

1. A carding machine having a feed side for fiber bundles, wherein, The carding mechanism causes the fiber bundle to be fed to a rotating cylinder (4) by means of at least one licker roller (3a, 3b, 3c), wherein the fiber bundle is loosened into individual fibers, oriented and cleaned between the fixed carding machine elements and the surrounding cover strip (17) and the cylinder (4), and the resulting fiber web can be transferred from the cylinder (4) to the doffer (5), and a device for converting the fiber web into fiber strips is arranged downstream of the doffer. The cylinder (4) is characterized by having a diameter of at least 1400 mm and a carding length (KL) of at least 3190 mm, the carding length being determined by the sub-circumferential surface of the cylinder (4) between the contact point of the licker roller (3c) and the cylinder (4) and the contact point of the cylinder (4) and the doffer (5), wherein the maximum height between the bottom side of the frame (18) and the axis of the cylinder (4) is 1230 mm.

2. The carding machine according to claim 1, characterized in that, The difference between the front and back heels (Fv-Fh) of the flat needle cloth (17a) of the cover strip (17) and the spacing of the needle cloth relative to the cylinder (4) over a width of 20 mm is less than 12 / 1000'' [inches].

3. The carding machine according to claim 1, characterized in that, The difference between the front and back heels (Fv-Fh) of the flat needle cloth (17a) of the cover strip (17) and the needle cloth of the cylinder (4) is 11 / 1000'' [inches] at a width of 20mm.

4. The carding machine according to claim 1, characterized in that, At least 38 cover strips (17) of the surrounding rotary cover (16) continuously interact with the cylinder (4).

5. The carding machine according to claim 2, characterized in that, At least 38 cover strips (17) of the surrounding rotary cover (16) continuously interact with the cylinder (4).

6. The carding machine according to claim 3, characterized in that, At least 38 cover strips (17) of the surrounding rotary cover (16) continuously interact with the cylinder (4).

7. The carding machine according to any one of claims 4 to 6, characterized in that, The surrounding rotary cover (16) is arranged symmetrically about the vertical centerline of the axis passing through the cylinder (4).

8. The carding machine according to claim 1, characterized in that, The maximum circumferential angle formed by the combing length (KL) between the contact point of the licker-in roller (3c) and the cylinder (4) and the contact point of the cylinder (4) and the doffer (5) is 280°.

9. The carding machine according to claim 7, characterized in that, The maximum circumferential angle formed by the combing length (KL) between the contact point of the licker-in roller (3c) and the cylinder (4) and the contact point of the cylinder (4) and the doffer (5) is 280°.

10. The carding machine according to claim 1, characterized in that, The front combing area (VK) has at least one diagonal arc of at least 900 mm on the cylinder circumference surface.

11. The carding machine according to claim 9, characterized in that, The front combing area (VK) has at least one diagonal arc of at least 900 mm on the cylinder circumference surface.

12. The carding machine according to claim 10 or 11, characterized in that, The front combing area is designed to accommodate at least nine cleaning elements.

13. The carding machine according to claim 1, characterized in that, The maximum working width of the cylinder (4) is 1300mm.

14. The carding machine according to claim 12, characterized in that, The maximum working width of the cylinder (4) is 1300mm.

15. The carding machine according to claim 1, characterized in that, The combing mechanism causes the cylinder (4) to run at a maximum circumferential speed of 2450 m / min.

16. The carding machine according to claim 14, characterized in that, The combing mechanism causes the cylinder (4) to run at a maximum circumferential speed of 2450 m / min.

17. The carding machine according to claim 1, characterized in that, The maximum circumferential angle formed by the combing length (KL) between the contact point of the licker-in roller (3c) and the cylinder (4) and the contact point of the cylinder (4) and the doffer (5) is 270°.

18. The carding machine according to claim 7, characterized in that, The maximum circumferential angle formed by the combing length (KL) between the contact point of the licker-in roller (3c) and the cylinder (4) and the contact point of the cylinder (4) and the doffer (5) is 270°.

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