Carding mechanism for rotor spinning machines and rotor spinning device for mixing colours

Abstract

The utility model provides a spinning mechanism of rotor spinning frame and rotor spinning mixed color yarn forming device relates to rotor spinning frame technical field. A kind of spinning mechanism of rotor spinning frame, including combing cavity and the combing roller being installed in combing cavity;The combing roller is composite combing roller, including roller body, bearing and multiple different sizes rack, the roller body is pressed together with bearing;Multiple rack is side by side, coaxial arrangement on the roller body, and different multiple combing sections of combing structure are formed in the roller body axial direction, and each rack corresponds one combing section.The utility model provides a combing mechanism, different sizes rack is installed in single combing roller, different raw materials can be realized simultaneously combing function, especially suitable for the spinning demand of multiple group of multi-component fancy yarn.

Description

Technical Field

[0001] This utility model relates to the field of rotor spinning machine technology, and in particular to a combing mechanism and a rotor spinning mixing and yarn forming device for a rotor spinning machine. Background Technology

[0002] Rotor spinning machines have become the most technologically mature, widely used, and economically and socially beneficial form of spinning. The spinning principle of rotor spinning can be summarized as follows: Fiber slivers (such as cotton slivers) are held by a feed plate and feed rollers through a trumpet-shaped opening. The feed rollers rotate and transport the fiber slivers to the carding zone. In the carding zone, high-speed rotating carding rollers open, peel, comb, separate, and mix the fiber slivers, turning them into separate, parallel single fibers that enter the fiber conveying channel. Under the action of airflow, the fibers flow through the fiber conveying channel into the rotor. Under the centrifugal force of the high-speed rotating rotor, the fibers are further superimposed and mixed in the condensing tank. After being drawn out by the master yarn and twisted by the twist stopper, the fibers are drawn out by the yarn drawing mechanism and wound into yarn.

[0003] With the textile industry's increasing demands for yarn quality and variety, and the development of intelligent manufacturing trends, traditional rotor spinning machines can no longer meet actual production needs. This is mainly reflected in the following aspects: First, the range of raw materials and yarn varieties is limited. Traditional rotor spinning machines typically only allow for single-sliver feeding and carding. If blended yarns are to be produced, the raw materials must be mixed in the preceding spinning process, which not only increases process complexity and production costs but also easily leads to uneven mixing of raw materials, affecting yarn quality. Second, traditional rotor spinning machines cannot spin special varieties of yarn such as multi-colored yarns, gradient yarns, and slub yarns, making it difficult to meet the market's demand for personalized and diversified yarns, thus limiting the application scope and economic value of rotor spinning machines.

[0004] Accordingly, existing technologies have also provided some rotor spinning mixed-color yarn forming solutions. For example, Chinese patent ZL201410111992.5 discloses a rotor spinning machine with two sets of carding devices placed side-by-side, and simultaneously having two sets of feeding devices and two channels sharing a single rotor. The two sets of carding devices and feeding devices are respectively located on the left and right sides of the spinning machine housing, arranged in a staggered manner, and are driven independently. The two channels cooperate with the two carding devices respectively, and are connected to the rotor through fiber outlets. This dual-feed, dual-carding spinning solution overcomes the structural and performance defects of existing rotor spinning machines, changing rotor spinning from single-sliver feeding and carding to double-sliver feeding and carding, thereby expanding the types of rotor yarn, improving the quality of rotor yarn, and effectively increasing the speed of rotor spinning. However, although the double-feed double-carding rotor spinning technology has advantages in terms of process flow, production efficiency, rotor yarn strength, and yarn evenness, it also has drawbacks. In this technology, the two fiber outlets corresponding to the two feed rollers are evenly distributed within the rotor, and the line connecting the centers of the two outlets passes through the rotor's rotation axis. From the appearance of the yarn, the spacing between the two fiber segments appears equal, making it difficult to precisely control the spacing ratio of the two fiber segments. Furthermore, it requires two sets of feeding devices, two channels, and two carding devices, resulting in high assembly costs and energy consumption.

[0005] On the other hand, existing technologies also provide multi-feed single-carding rotor spinning technology. For example, Chinese patent ZL201420229715.X discloses a rotor spinning mixed-color yarn forming device, including a sliver divider, a bell mouth, a set of coaxial flange loose-fitting combined feed rollers, roller bearings, bearing mounting supports, a feed plate, and related transmission mechanisms and control devices. The coaxial flange loose-fitting combined rollers include at least two feed rollers. During spinning, on a rotor spinning machine, multiple fiber slivers are fed through the sliver divider, bell mouth, and feed rollers. The fibers enter the combing zone, where they are loosened and combed by the combing rollers, then detached from the rollers and transferred to the conveyor tube. They then enter the spinning cup, where they are condensed, mixed, and twisted into yarn. Finally, the yarn is drawn out by the yarn guide mechanism and wound into cone yarn. The rotor spinning process involves mixing and blending the fibers to form the final yarn. At least two fiber slivers are fed into the spinning process in two groups, with different colors, color combinations, or fiber compositions. The feeding mechanism is controlled by a computer program controller. The feeding mechanism can independently control at least two sets of fiber slivers, feeding them into the combing zone at different speeds or at speeds that vary in time intervals. Each fiber sliver is fed into the combing mechanism in a straight line. Different colors or components of single fibers, after being opened and combed by the combing rollers, are transferred from the combing rollers to the conveying tube by the centrifugal force of the combing rollers and the supplementary airflow. During the process of separation, transfer, and aggregation in the spinning cup, multi-color or multi-component fibers are remixed and twisted, forming yarn with variations in color fiber combination, fiber composition, or linear density along the yarn length. The above scheme employs a multi-feed single-comb scheme, feeding at varying speeds and in segments on the same feeding nip line, followed by combing, opening, mixing, aggregation, and twisting to form yarn, achieving multi-color or multi-component rotor-spun segmental or non-segmental mixed-color and blended fiber yarns.Based on the aforementioned multi-feed single-combing rotor spinning blending yarn forming device, Chinese Patent ZL201620088665.7 makes further improvements, disclosing a rotor spinning blending yarn forming device, including a guide roller, a bell mouth, a set of combined feeding rollers, roller bearings, bearing mounting supports, a feeding plate, and related transmission mechanisms and control devices; the combined feeding rollers include a single feeding roller and a set of at least two coaxial feeding rollers; when spinning blended or multi-color yarns, the fed fiber slivers are at least two slivers divided into two groups, with the fed fiber slivers having different colors, different color combinations, or different fiber compositions, and the feeding mechanism is controlled by a computer program. The feeding mechanism is controlled independently by a controller, which can feed at least two groups of fiber slivers into the combing zone at different speeds or at speeds that vary in time intervals. Each fiber sliver is fed into the combing mechanism in a straight line. After being opened and combed by the combing rollers, single fibers of different colors or compositions are transferred from the combing rollers to the conveying tube by the centrifugal force of the combing rollers and the action of the supplementary airflow. During the process of separation, transfer and coagulation in the spinning cup, multi-color or multi-component fibers are remixed and twisted to form yarn with multiple color fiber combinations, fiber composition combinations, or linear density variations along the yarn length. The structure of the above-mentioned multi-feed single-combing rotor spinning device is relatively simple. By implementing independent control of at least two feed rollers on the rotor spinning machine, the feeding speed of at least two fiber strips is controllable. Moreover, the feeding speed of each fiber strip can be independently variable or simultaneously variable at different time periods. Therefore, it can be used to produce short-segment equal linear density rotor-spun segmental or non-segmental mixed color yarns, rotor-spun segmental or non-segmental fancy yarns with slub or slub yarn effects, or segmental or non-segmental mixed color yarns for knitting or weaving with a strong sense of fashion.

[0006] However, due to the differences in properties between different types of fiber slivers, the carding rollers in the aforementioned multi-feed single-carding rotor spinning device cannot guarantee the carding quality of each fiber sliver when carding different types of fiber slivers. If the carding intensity is too strong, it will excessively damage the fibers, resulting in a decrease in yarn strength and evenness, and an increase in short fiber content. If the carding intensity is insufficient, impurities and neps cannot be effectively removed, resulting in more neps, more hairiness, and uneven strength in the yarn. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a carding mechanism for a rotor spinning machine and a rotor spinning and mixing yarn forming device. The carding mechanism provided by this invention installs racks of different sizes in a single carding roller, enabling simultaneous carding of different raw materials. It is particularly suitable for the spinning needs of multi-component fancy yarns and can produce various fancy yarns such as segmented yarn, gradient yarn, ripple yarn, and voile yarn according to customer requirements.

[0008] To achieve the above objectives, this utility model provides the following technical solution: A carding mechanism for a rotor spinning machine includes a carding chamber and carding rollers installed in the carding chamber; The combing roller is a composite combing roller, comprising a roller body, bearings and multiple toothed racks of different sizes, wherein the roller body and bearings are press-fitted together; Multiple racks are arranged side by side and coaxially on the roller body, forming multiple combing sections with different combing structures in the axial direction of the roller body, with each rack corresponding to one combing section.

[0009] Furthermore, the multiple toothed strips are respectively installed on the roller body in an embedded manner, and are used to comb the fiber strips of different raw materials entering the same combing chamber. The multiple fiber strips entering the combing chamber are combed simultaneously by different toothed strips.

[0010] Furthermore, the rack is a ring-shaped rack ring with a preset width, which covers the surface of the roller to form a continuous combing surface. Different rack rings form combing surfaces of different combing segments on the surface of the roller. Each rack ring is detachably connected to the roller body, allowing the rack ring to be separated from the roller body as a whole for replacement.

[0011] Furthermore, at least a first rack ring and a second rack ring are installed on the roller body, and the serration sizes of the first rack ring and the second rack ring are different; After the fiber slivers made from the first and second raw materials are fed into the same combing chamber, they are opened and combed by the first and second toothed rings on the combing rollers in the combing chamber, and then mixed to form a multi-raw material fiber stream. The multi-raw material fiber stream enters the coagulation tank of the rotor through the fiber conveying channel. After being twisted by the high-speed rotation of the rotor, it is drawn out by the yarn drawing mechanism and wound into yarn.

[0012] Furthermore, the serrations of the first and second rack rings are arranged in a diagonal pattern; Different rack rings have different working angles, longitudinal tooth pitch, tooth density, tooth depth and / or tooth profiles, resulting in different tooth sizes.

[0013] This utility model also provides a rotor spinning and color mixing yarn forming device, including a controller and a spinning machine, wherein the spinning machine includes a feeding mechanism and a carding mechanism; The combing mechanism is the aforementioned combing mechanism; The feeding mechanism includes a multi-feed collector and a multi-feed roller structure. The multi-feed collector is provided with multiple feeding ports. The multi-feed roller structure includes a set of coaxial stacked combination rollers. The multiple feeding rollers of the stacked combination roller are stacked vertically and rotate around the same axis. Each feeding roller is equipped with an independent transmission mechanism to achieve individual transmission. Multiple fiber strips made of different materials are fed into the multi-feed collector through different feed ports and then fed into their respective feed rollers. Each feed roller independently controls the feeding parameters of one fiber strip.

[0014] Furthermore, the multi-feed roller structure includes a composite motor, multiple feed rollers, multiple shafts, and multiple bearings, with each feed roller corresponding to one of the shafts; The composite motor is equipped with multiple independent output shafts that can output different speeds, and the output shafts of the composite motor are connected to each other.

[0015] Furthermore, the feeding port includes an inlet section, a transition section, and a flared section connected in sequence. The output end of the flared section corresponds to the multi-feed roller. The inlet section is perpendicular to the flared section. The transition section is used to connect the flared section and the inlet section. The fiber strip is fed into the feeding roller after passing through the inlet section, the transition section, and the flared section in sequence.

[0016] Furthermore, the multi-feed roller structure includes two feeding rollers forming a dual-feed roller, and the multi-feed collector is provided with two feeding ports forming a dual-feed collector; The composite motor has two independent output shafts, which are connected to the first shaft and the second shaft respectively. The first shaft is equipped with a first bearing, a second bearing and a first feed roller, and the second shaft is equipped with a second roller.

[0017] Furthermore, the feeding port includes a first feeding port and a second feeding port. The flared sections of the first feeding port and the second feeding port are separated and stacked vertically. The outlets of the upper and lower flared sections correspond to the two feeding rollers stacked vertically. The inlet sections of the first and second feeding ports are arranged parallel to each other in the vertical direction and have a preset distance between them; The inlet section of the first feeding port adopts a C-shaped tube or a U-shaped tube with open side walls; The inlet section of the second feeding port adopts a circular tube with a complete bottom but partially open upper and middle side walls. One side wall of the circular tube extends upward and connects with the side wall of the transition section to form an integral back plate to constrain the fiber strip.

[0018] Compared with the prior art, this utility model has the following advantages and positive effects due to the adoption of the above technical solutions: The carding mechanism provided by this utility model has racks of different sizes installed in a single carding roller, which can realize the function of carding different raw materials at the same time. It is especially suitable for the spinning needs of multi-component fancy yarns, and can realize various fancy yarns such as segmented yarn, gradient yarn, ripple yarn, and Buddha belly yarn according to customer needs.

[0019] On the other hand, a rotor spinning and blending yarn forming device including the aforementioned combing mechanism is provided. This device adopts a multi-feed single combing structure to meet diverse fancy spinning needs.

[0020] On the other hand, the fiber sliver feeding mechanism of the rotor spinning blending yarn forming device was improved, and the design structure of the multi-feed roller structure and the multi-feed collector was optimized. Attached Figure Description

[0021] Figure 1 A three-dimensional structural diagram of the combing roller of the combing mechanism provided in this embodiment of the utility model.

[0022] Figure 2 for Figure 1 Front view of the center comb roller.

[0023] Figure 3 A three-dimensional structural diagram of the composite spinning device for the rotor spinning and color mixing yarn forming apparatus provided in this embodiment of the utility model.

[0024] Figure 4 for Figure 3 Front view of a medium-composite spinning machine.

[0025] Figure 5 This is a three-dimensional structural diagram of the dual-feed roller structure provided in an embodiment of the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the dual-feeding collector provided in an embodiment of the present utility model.

[0027] Explanation of reference numerals in the attached figures: Spinner 10, carding roller 100, multi-feed roller structure 200, multi-feed collector 300; Roller body 110, bearing 120, first rack 130, second rack 140; First shaft 210, second shaft 220, first feed roller 230, second feed roller 240, second bearing 250, first bearing 260, composite motor 270; Entry sections 311 and 312, transition sections 312 and 322, flared sections 313 and 323, and back plate 324. Detailed Implementation

[0028] The carding mechanism and the rotor spinning and mixing device of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated; they can be combined with each other to achieve better technical effects. In the accompanying drawings of the following embodiments, the same reference numerals in each drawing represent the same features or components, which can be applied to different embodiments. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of the utility model. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the utility model, should fall within the scope of the technical content disclosed in the utility model. The scope of the preferred embodiments of this utility model includes other implementations, wherein functions may be performed not in the order stated or discussed, including substantially simultaneously or in reverse order, according to the functions involved. This should be understood by those skilled in the art to which the embodiments of this utility model pertain.

[0030] In the description of the embodiments of this application, "and / or" is used to describe the association relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" means: A and B exist alone, B exists alone, and A and B exist simultaneously. In the description of the embodiments of this application, "multiple" refers to two or more. Example

[0031] This invention improves upon existing multi-feed single-combing rotor spinning machines, enabling them to enhance the combing quality of fiber slivers from different raw materials (or varieties) when combed simultaneously.

[0032] Specifically, a carding mechanism for a rotor spinning machine is provided, the carding mechanism including a carding chamber and carding rollers installed within the carding chamber. See also Figure 1 As shown, the combing roller 100 is a composite combing roller, including a roller body 110, a bearing 120, and multiple racks of different sizes. The roller body and the bearing are press-fitted together. The multiple racks are arranged side by side and coaxially on the roller body, forming multiple combing segments with different combing structures in the axial direction of the roller body. Each rack corresponds to one combing segment.

[0033] As an example of a typical approach, Figure 1 The example illustrates a scenario with two racks, including a first rack 130 and a second rack 140.

[0034] In this embodiment, the first rack 130 and the second rack 140 are respectively mounted on the roller body 110 by an embedded method. The first rack 130 and the second rack 140 are respectively used to comb the first fiber strip and the second fiber strip of different raw materials entering the same combing chamber. The first fiber strip and the second fiber strip entering the combing chamber are combed simultaneously by the first rack 130 and the second rack 140 respectively.

[0035] Preferably, the rack is a ring-shaped rack ring with a preset width. The rack ring covers the surface of the roller body to form a continuous combing surface, and different rack rings form different combing segments on the roller body surface. See also Figure 1 and Figure 2 As shown, the first toothed rack 130 and the second toothed rack 140 form two combing sections on the surface of the roller body, corresponding to two combing surfaces respectively. The combing structure of different combing surfaces is different, which can be applied to the characteristics of fiber strips of different raw materials.

[0036] More preferably, each rack ring is detachably connected to the roller body, allowing the rack ring to be separated from the roller body as a whole, thus facilitating replacement of the rack ring as needed. In this way, during spinning, a rack structure matching the raw material can be installed, resulting in better carding of the fiber sliver using that material. In this case, a rack set including multiple rack models can be configured for each carding roller, with each rack model labeled with the type of fiber it is suitable for carding.

[0037] In this embodiment, taking a roller body with a first toothed ring and a second toothed ring as an example, after the fiber strips of the first raw material and the second raw material are transported to the same combing chamber, they are opened and combed by the first toothed ring and the second toothed ring on the combing roller in the combing chamber, and then mixed to form a multi-raw material fiber stream. The multi-raw material fiber stream enters the coagulation groove of the rotor through the fiber conveying channel. After being twisted by the high-speed rotation of the rotor, it is drawn out by the yarn drawing mechanism and wound into yarn.

[0038] In specific implementation, the serrations of the first and second rack rings are preferably arranged in a diagonal pattern, see [reference]. Figure 1 and Figure 2 As shown. Different rack rings have different working angles, longitudinal tooth pitch, tooth density, tooth depth, and / or tooth profiles, resulting in different tooth sizes. Preferably, the working angle of the saw teeth is set to 50-100° (the working angle is the angle between the front edge of the tooth and the horizontal direction). The longitudinal tooth pitch is set to 2.0-6.0 mm. The tooth density is measured in teeth / (25.4 mm²), for example, the tooth density of cotton fibers is generally 860-949 teeth / (25.4 mm²). The tooth depth is set to 1.9-3.0 mm. The tooth profile can be straight or curved.

[0039] Compared with existing technologies, the advantages of the above-mentioned combing mechanism are: each combing roller is equipped with toothed strips of different sizes, which improves the combing quality of different raw materials combing at the same time, and is especially suitable for the spinning needs of multi-component fancy yarns.

[0040] Another embodiment of this utility model provides a rotor spinning and color mixing yarn forming device. The rotor spinning and color mixing yarn forming device includes a controller and a spinning machine, see [link to relevant documentation]. Figure 3 and Figure 4 The diagram illustrates a typical structure of a spinning machine.

[0041] Specifically, the spinning machine includes at least a feeding mechanism and a carding mechanism.

[0042] The combing mechanism includes a combing chamber and a combing roller installed within the combing chamber. The combing roller is a composite combing roller, comprising a roller body, bearings, and multiple racks of different sizes. The roller body and bearings are press-fitted together. Multiple racks are arranged side-by-side and coaxially on the roller body, forming multiple combing segments with different combing structures along the axial direction of the roller body. Each rack corresponds to one combing segment. This is the aforementioned combing mechanism. Other features of the combing mechanism are referred to in the previous embodiment and will not be repeated here.

[0043] The feeding mechanism may include a multi-feed collector and a multi-feed roller structure.

[0044] The multi-feeding collector is provided with multiple feeding ports, which are stacked vertically, and the output ports of the multiple feeding ports are in a straight line position. See [reference needed]. Figure 3 As shown.

[0045] Preferably, in this embodiment, the feeding port may include an inlet section, a transition section and a flared section connected in sequence. The output end of the flared section corresponds to the multiple feeding rollers. The inlet section is perpendicular to the flared section. The transition section is used to connect the flared section and the inlet section. The fiber strip is fed into the feeding rollers after passing through the inlet section, the transition section and the flared section in sequence.

[0046] The multi-feed roller structure includes a set of coaxial stacked combination rollers. Multiple feed rollers of the stacked combination rollers are stacked vertically and rotate around the same axis. Each feed roller is equipped with an independent transmission mechanism to achieve individual transmission. Multiple fiber slivers made of different raw materials are input through different feed ports of the multi-feed collector and then fed into their respective feed rollers. Each feed roller independently controls the feeding parameters of one fiber sliver.

[0047] Preferably, the multi-feed roller structure may include a composite motor, multiple feed rollers, multiple shafts, and multiple bearings, with each feed roller corresponding to one of the shafts.

[0048] The composite motor is equipped with multiple independent output shafts that can output different speeds, and the output shafts of the composite motor are connected to each other.

[0049] Taking the dual-feed roller structure as an example, see Figure 5 As shown, the dual-feed roller structure includes a set of two coaxial feeding rollers arranged in an upper and lower stack. Correspondingly, the multi-feed collector is provided with two feeding ports to form a dual-feed collector.

[0050] The composite motor has two independent output shafts, which are connected to a first shaft 210 and a second shaft 220 respectively. The first shaft 210 is equipped with a first bearing 260, a second bearing 250, and a first feed roller 230, while the second shaft 220 is equipped with a second roller 240. In this way, a single composite motor can achieve two independently driven feed rollers, and the two feed rollers can simultaneously meet different speed requirements, thereby fulfilling the needs of various fancy yarns.

[0051] For a typical structure of a dual-feed collector, see [link to relevant documentation]. Figure 6 As shown. At this time, the feeding port includes a first feeding port and a second feeding port. The flared section 313 of the first feeding port and the flared section 323 of the second feeding port are separated and stacked vertically. The outlets of the upper and lower flared sections correspond to the two stacked feeding rollers, respectively. That is, the output port of the flared section 313 of the first feeding port corresponds to the first feeding roller 230, and the output port of the flared section 323 of the second feeding port corresponds to the second feeding roller 240.

[0052] The inlet section 311 of the first feeding port and the inlet section 321 of the second feeding port are arranged parallel to each other in the vertical direction and have a preset distance.

[0053] Preferably, the inlet section 311 of the first feeding port adopts a C-shaped tube or a U-shaped tube with open sidewalls.

[0054] The inlet section 321 of the second feeding port adopts a circular tube with a complete bottom but an open middle and upper side wall. One side wall of the circular tube extends upward and connects with the side wall of the transition section to form an integral back plate to constrain the fiber strip.

[0055] In this embodiment, the spinning machine may also include a waste removal mechanism, a cohesion and twisting mechanism, a winding mechanism, etc. The specific structure and working method of the waste removal mechanism, the cohesion and twisting mechanism, and the winding mechanism are existing technologies and will not be described in detail here.

[0056] In the foregoing description, within the scope of this disclosure, components may be selectively and operationally incorporated in any number. Furthermore, terms such as “comprising,” “encompassing,” and “having” should be interpreted by default as inclusive or open-ended, rather than exclusive or closed, unless explicitly defined as such. All technical, scientific, or other terms shall be interpreted as understood by one of those skilled in the art, unless explicitly defined as such. Public terms found in dictionaries should not be interpreted in a too idealistic or impractical manner in the context of the relevant technical documentation, unless explicitly defined as such in this disclosure.

[0057] While exemplary aspects of this disclosure have been described for illustrative purposes, those skilled in the art should recognize that the foregoing description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention. The scope of the preferred embodiments of the present invention includes other implementations in which functions may be performed in a different order than those described or discussed. Any modifications or alterations made by those skilled in the art based on the foregoing disclosure are within the scope of the claims.

Claims

1. A carding mechanism for a rotor spinning machine, comprising a carding chamber and carding rollers installed within the carding chamber, characterized in that: The combing roller is a composite combing roller, comprising a roller body, bearings and multiple toothed racks of different sizes, wherein the roller body and bearings are press-fitted together; Multiple racks are arranged side by side and coaxially on the roller body, forming multiple combing sections with different combing structures in the axial direction of the roller body, with each rack corresponding to one combing section.

2. The combing mechanism according to claim 1, characterized in that: The multiple toothed strips are respectively installed on the roller body in an embedded manner, and are used to comb the fiber strips of different raw materials that enter the same combing chamber. The multiple fiber strips entering the combing chamber are combed simultaneously by different toothed strips.

3. The combing mechanism according to claim 1, characterized in that: The rack is a ring-shaped rack ring with a preset width. The rack ring covers the surface of the roller body to form a continuous combing surface. Different rack rings form combing surfaces of different combing segments on the surface of the roller body. Each rack ring is detachably connected to the roller body, allowing the rack ring to be separated from the roller body as a whole for replacement.

4. The combing mechanism according to claim 3, characterized in that: At least a first rack ring and a second rack ring are installed on the roller body, and the serration size of the first rack ring and the second rack ring is different; After the fiber slivers made from the first and second raw materials are fed into the same combing chamber, they are opened and combed by the first and second toothed rings on the combing rollers in the combing chamber, and then mixed to form a multi-raw material fiber stream. The multi-raw material fiber stream enters the coagulation tank of the rotor through the fiber conveying channel. After being twisted by the high-speed rotation of the rotor, it is drawn out by the yarn drawing mechanism and wound into yarn.

5. The combing mechanism according to claim 4, characterized in that: The serrations of the first and second rack rings are arranged in a diagonal pattern; Different rack rings have different working angles, longitudinal tooth pitch, tooth density, tooth depth and / or tooth profiles, resulting in different tooth sizes.

6. A rotor spinning and blending yarn forming device, comprising a controller and a spinning machine, wherein the spinning machine includes a feeding mechanism and a carding mechanism, characterized in that: The combing mechanism is the combing mechanism according to any one of claims 1-5; The feeding mechanism includes a multi-feed collector and a multi-feed roller structure. The multi-feed collector is provided with multiple feeding ports. The multi-feed roller structure includes a set of coaxial stacked combination rollers. The multiple feeding rollers of the stacked combination roller are stacked vertically and rotate around the same axis. Each feeding roller is equipped with an independent transmission mechanism to achieve individual transmission. Multiple fiber strips made of different materials are fed into the multi-feed collector through different feed ports and then fed into their respective feed rollers. Each feed roller independently controls the feeding parameters of one fiber strip.

7. The apparatus according to claim 6, characterized in that: The multi-feed roller structure includes a composite motor, multiple feed rollers, multiple shafts, and multiple bearings, with each feed roller corresponding to one of the shafts. The composite motor is equipped with multiple independent output shafts that can output different speeds, and the output shafts of the composite motor are connected to each other.

8. The apparatus according to claim 6 or 7, characterized in that: The feeding port includes an inlet section, a transition section, and a flared section connected in sequence. The output end of the flared section corresponds to the multi-feed roller. The inlet section is perpendicular to the flared section. The transition section is used to connect the flared section and the inlet section. The fiber strip is fed into the feeding roller after passing through the inlet section, the transition section, and the flared section in sequence.

9. The apparatus according to claim 8, characterized in that: The multi-feed roller structure includes two feeding rollers forming a dual-feed roller, and the multi-feed collector is provided with two feeding ports forming a dual-feed collector; The composite motor has two independent output shafts, which are connected to the first shaft and the second shaft respectively. The first shaft is equipped with a first bearing, a second bearing and a first feed roller, and the second shaft is equipped with a second roller.

10. The apparatus according to claim 9, characterized in that: The feeding port includes a first feeding port and a second feeding port. The flared sections of the first feeding port and the second feeding port are separated and stacked vertically. The outlets of the upper and lower flared sections correspond to the two feeding rollers stacked vertically. The inlet sections of the first and second feeding ports are arranged parallel to each other in the vertical direction and have a preset distance between them; The inlet section of the first feeding port adopts a C-shaped tube or a U-shaped tube with open side walls; The inlet section of the second feeding port adopts a circular tube with a complete bottom but partially open upper and middle side walls. One side wall of the circular tube extends upward and connects with the side wall of the transition section to form an integral back plate to constrain the fiber strip.

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