Kneading machine and kneading method

Abstract

The invention discloses a kneading machine and a kneading method, the kneading machine comprises a box body, a kneading cavity and a rotor, the kneading cavity is arranged in the box body, and the box body is provided with a feeding port; the rotor can be rotatably arranged in the inner space of the kneading cavity, the rotation axis of the rotor is consistent with the first direction, the kneading cavity comprises a cavity body and at least one pair of feeding bin covers, the feeding bin covers are rotatably connected to the cavity body, the feeding bin covers can rotate between a first position and a second position, and the feeding bin covers can rotate between the first position and the second position. Each pair of feeding bin covers is opened relative to the cavity main body, a feeding channel is formed between each pair of feeding bin covers, and the feeding channel is communicated with the feeding port and the internal space; and at the second position, each pair of feeding bin covers is formed to cover the cavity main body. By means of the kneading machine, the amount of powder remaining on the inner wall of the kneading machine can be reduced, the powder can enter the kneading cavity more easily in a concentrated mode, and the mixing efficiency and the mixing quality can be improved while self-cleaning of the kneading cavity is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a kneading machine and a kneading method for battery slurry production. Background Art

[0002] During the lithium battery coating process, it is necessary to mix and knead the battery slurry. For example, in the production process of high solid content dry battery slurry, the mixing effect of the slurry will directly affect the processing quality of subsequent coating, cold pressing and other processes, and may ultimately affect the quality of the produced batteries and the qualified rate of finished products. At present, kneading machines are widely used in the mixing of high solid content dry battery slurry.

[0003] In the process of feeding battery slurry, the powder will generate dust when it is put into the kneading machine, causing the dry powder residue to accumulate on the inner wall of the kneading machine, which cannot be removed in time, affecting the yield of the manufacturing process and the production quality of the battery. Therefore, how to provide a kneading machine with no dry powder residue on the inner wall during the kneading production process is one of the research and development topics in the industry. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a kneading machine and a kneading method.

[0005] This application is implemented through the following technical solutions.

[0006] A first aspect of an embodiment of the present application provides a kneading machine, comprising a box, a kneading cavity and a rotor. The kneading cavity is arranged in the box body, and the box body is provided with a feeding port; The rotor is rotatably disposed in the inner space of the kneading cavity and the rotation axis is consistent with the first direction. The kneading cavity includes a cavity body and at least one pair of feeding bin covers, and the feeding bin covers are rotatably connected to the cavity body, respectively, and the feeding bin covers can rotate between a first position and a second position. In the first position, each pair of the feed bin covers is open relative to the cavity body, and a feeding channel is formed between each pair of the feed bin covers, the feeding channel connecting the feeding port and the internal space; In the second position, each pair of the feed bin covers is configured to cover the cavity body.

[0007] Since the feed bin cover can rotate between the first position and the second position, when feeding into the kneading cavity, each pair of feed bin covers rotates to the first position to form a feeding channel, reducing the amount of powder remaining on the inner wall of the box body and reducing powder dust, making it easier for the powder to enter the kneading cavity; each pair of feed bin covers rotates to the second position to close the kneading cavity, and the rotation of the rotor drives the residual powder on the inner surface of the feed bin cover to participate in kneading, thereby achieving self-cleaning of the kneading cavity and improving mixing efficiency and mixing quality.

[0008] In some embodiments, the box body includes a top wall, which is arranged on one side of the box body in the opposite direction of the gravity direction, and the top wall is provided with the feeding port; on both sides along the second direction, each of the feeding bin covers includes a first end and a second end, the second direction is perpendicular to the first direction and the gravity direction, and the second end is rotatably connected to the cavity body; in the first position, the first end of each pair of the feeding bin covers is in contact with the top wall; in the second position, at least part of the first end of each pair of the feeding bin covers overlaps along the gravity direction. Thus, each pair of feed bin covers turns to the first position and contacts the top wall, further reducing the risk of dust adhering to the wall and being difficult to clean; when turned to the second position, the overlap can enhance the sealing effect of the kneading cavity and further enhance the mixing efficiency.

[0009] In some embodiments, the inner wall of the cavity body and the feed bin cover are both curved wall surfaces, the rotor has at least one convex ridge, and the minimum distance between the convex ridge and the curved wall surface is in the range of 2 to 7 mm. Since the distance between the rotor and the curved wall is within a suitable range, the shear dispersion effect between the rotor and the curved wall can be further enhanced, the mixing and dispersion degree of the materials can be improved, the time for single mixing and kneading of materials can be reduced, and the production efficiency can be improved.

[0010] In some embodiments, the curvature of the second end portion is in the range of π / 6-π / 3. Thus, the second end is in a suitable arc, so that the torque and rotation efficiency of the driving rotation are suitable while taking into account the sealing effect of the first position and the second position, thereby reducing the mutual interference of each pair of hopper covers.

[0011] In some embodiments, along the first direction, the box body includes two side walls, and both ends of the feed bin cover along the first direction are in contact with the side walls.

[0012] Since the side wall is the box wall in the first direction of the box body, the material adhering to the side wall can be scraped off and brought to the kneading cavity for kneading when the feed bin cover is turned to the second position, thereby further improving the self-cleaning ability of the kneading machine.

[0013] In some embodiments, in the second position, the first end protrudes along the direction of gravity.

[0014] Since the first end protrudes along the direction of gravity, the feeding bin cover in the second position can penetrate deeper into the kneading cavity, reducing the blind area volume of the rotor rotation in the kneading cavity, making the rotor field cover a larger proportion, making the material easier to be driven by the rotor, and further improving the mixing effect.

[0015] In some embodiments, the thickness of the first end portion is equal to half the thickness of the second end portion. Since the thickness of the first end portion is equal to half of the thickness of the second end portion, it is convenient for the first ends of each pair of feed bin covers to overlap at the second position.

[0016] In some embodiments, the rotor includes a first rotor and a second rotor disposed in the kneading cavity along the second direction, and the rotation axes of the first rotor and the second rotor are parallel on both sides along the second direction.

[0017] Since two rotors are arranged in the kneading chamber, the two rotors realize material dispersion and kneading through rotation, thereby reducing the kneading blind area and improving the mixing effect.

[0018] In some embodiments, the kneading machine also includes a discharge mechanism arranged at the bottom of the kneading cavity, the discharge mechanism includes a discharge bin, the discharge bin includes a discharge cavity and a discharge screw arranged in the discharge cavity, the discharge cavity is connected to the kneading cavity, and the discharge screw is configured to push the kneaded material to move to the discharge port of the discharge bin by rotating. Since the kneading machine also includes a discharge mechanism arranged at the bottom, the discharge screw in the discharge mechanism can transport the kneaded material to be discharged. Therefore, discharging the material through the discharge screw can reduce the downtime for discharging, improve the continuous discharge capacity of the discharge mechanism, and improve the production efficiency of the kneading machine while also improving the airtightness of the kneading machine.

[0019] In some embodiments, the discharge mechanism further includes a discharge bin cover, which is disposed between the discharge cavity and the kneading cavity; in the third position, the discharge bin cover abuts against the inner wall of the cavity body and separates the kneading cavity and the discharge cavity. Since the discharge bin cover can separate the kneading chamber and the discharge chamber, the discharge bin cover is in the third position during the feeding and kneading process, closing the discharge chamber to prevent powder from falling into the discharge chamber and causing the discharge screw to deform under pressure, further improving product quality and extending the service life of the discharge screw.

[0020] In some embodiments, the discharge bin cover is configured to rotate about the first direction to the third position and be slidably connected to the outer wall of the discharge bin. Therefore, the sliding connection between the discharge bin cover and the outer wall of the discharge bin can make the contact surface fit closely during the rotation process, reduce the gap leakage caused by rotation, and improve the sealing reliability. In addition, the combination of rotation and sliding can accurately control the opening of the discharge port to achieve uniform discharge.

[0021] In some embodiments, the discharge mechanism also includes a discharge flange, a support frame and a cutting mechanism. The discharge port is provided with a discharge flange, and the discharge flange is connected to the discharge port through the support frame. The cutting mechanism is arranged on the discharge side of the discharge flange for cutting off the kneaded material. In some embodiments, a hard alloy coating is provided on the inner wall of the cavity body, the surface of the rotor and the surface of the discharge screw.

[0022] Since the inner wall of the cavity body, the rotor and the discharge screw are in a state of high humidity, high pressure and high temperature for a long time and are subjected to strong shearing during the kneading process, the hard alloy coating provided on their surface can prevent rust and wear and increase their service life.

[0023] In some embodiments, each of the feed bin covers is drivingly connected to at least one gas-liquid booster cylinder.

[0024] Therefore, the gas-liquid booster cylinder can provide high-pressure output, cooperate with the feed bin cover to seal the kneading cavity, and the pressure is stable, preventing the feed bin cover from moving during the kneading process and causing the kneading cavity seal to fail.

[0025] The second aspect of the embodiment of the present application further provides a kneading method, the kneading method is applied to a kneading machine, the kneading machine comprises a box body, a kneading cavity and a rotor, the kneading cavity is arranged in the box body, and the box body is provided with a feeding port; the rotor is rotatably arranged in the internal space of the kneading cavity and the rotation axis is consistent with the first direction, the kneading cavity comprises a cavity body and at least one pair of feeding bin covers, the feeding bin covers are rotatably connected to the cavity body, the feeding bin covers are rotatable between a first position and a second position, in the first position, each pair of the feeding bin covers is open relative to the cavity body, and a feeding channel is formed between each pair of the feeding bin covers, the feeding channel connects the feeding port and the internal space; in the second position, each pair of the feeding bin covers is configured to cover the cavity body; The kneading method comprises the following steps: Each pair of feed bin covers rotates to the first position to form the feeding channel, and feeds materials to the feeding port; Each pair of the feed bin covers rotates to the second position, and the rotor rotates to knead the material.

[0026] Therefore, the kneading method provided in the second aspect of the embodiment of the present application can reduce the undesirable situation of powder solidification and residue on the inner wall of the kneader during feeding, and can improve the mixing efficiency and product quality of the kneading machine while achieving self-cleaning of the kneading cavity.

[0027] The beneficial effects of the embodiments of the present application include: through the present application, the amount of powder remaining on the inner wall of the kneading machine can be reduced, the powder can be more easily concentrated into the kneading cavity, and the mixing efficiency and mixing quality can be improved while achieving self-cleaning of the kneading cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings: Figure 1 A top view of a kneading machine when a feed bin cover is in a first position provided in some embodiments of the present application; Figure 2 for Figure 1 Sectional view at AA in the middle; Figure 3 A top view of the kneading machine when the feed bin cover is in the second position provided in some embodiments of the present application; Figure 4 for Figure 3 Sectional view at the middle BB; Figure 5 A cross-sectional view of a discharge bin cover provided in some embodiments of the present application when the discharge bin cover is in a third position; Figure 6 A side view of a kneading machine provided for some embodiments of the present application; Figure 7 for Figure 3 Sectional view at CC; Figure 8 for Figure 4 A partial enlarged view of point D in the middle.

[0029] Description of Reference Numerals 1000, kneading machine; 100, box body; 110, top wall; 111, feeding port; 120, side wall; 200, kneading cavity; 210, cavity body; 220, feed bin cover; 221, first end; 222, second end; 300, rotor; 301, ridge; 310, first rotor; 320, second rotor; 400, discharge mechanism; 410, discharge bin; 411, discharge cavity; 420, discharge screw; 430, discharge port; 440, discharge bin cover; 450, discharge flange; 460, support frame; 470, cutting mechanism; 500, gas-liquid booster cylinder. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this document and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0032] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0033] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0035] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0036] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "parallel" and "perpendicular" are both allowed to have a certain degree of tolerance and / or error, including the situations of being approximately parallel and approximately perpendicular.

[0039] Below, this application is described in detail.

[0040] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0041] In the lithium battery coating process, it is necessary to mix and produce battery slurry. For example, in the production process of high-solid content dry-process battery slurry, the mixing effect of the slurry will directly affect the processing quality of subsequent coating, cold pressing and other processes, and may ultimately affect the quality of the produced batteries and the qualified rate of finished products. At present, kneading machines are widely used in the mixing of high-solid content dry-process battery slurry. In the process of feeding the battery slurry, the powder will be put into the kneading machine to generate dust, resulting in the accumulation of dry powder residues on the inner wall of the kneading machine, which cannot be removed in time, affecting the yield of the manufacturing process and the production quality of the battery. Therefore, how to provide a kneading machine with no dry powder residue on the inner wall during the kneading production process is one of the research and development topics in the industry.

[0042] After research and design, the kneading chamber is set to a structure with a rotatable feeding bin cover. After each pair of feeding bin covers rotates, a feeding channel is formed in the middle, connecting the feeding port and the kneading chamber, so that powder dust cannot stick to the inner wall of the kneading machine. The feeding bin cover closes the kneading chamber during the kneading process, and the powder stuck to the surface of the feeding bin cover can be driven by the rotor and separated from the feeding bin cover to participate in the kneading process, thereby reducing material waste and achieving the self-cleaning effect of the kneading chamber and the feeding bin cover.

[0043] Based on such a design concept, the present application designs a kneading machine, including a box body, a kneading cavity and a rotor. The kneading cavity is arranged in the box body, and a feeding port is opened in the box body; the rotor is rotatably arranged in the internal space of the kneading cavity and the rotation axis is consistent with the first direction; the kneading cavity includes a cavity body and at least one pair of feeding bin covers, which are rotatably connected to the cavity body respectively, and the feeding bin covers can rotate between a first position and a second position. In the first position, each pair of feeding bin covers is open relative to the cavity body, and a feeding channel is formed between each pair of feeding bin covers, and the feeding channel connects the feeding port and the internal space; in the second position, each pair of feeding bin covers is configured to cover the cavity body.

[0044] Since the feed bin cover can rotate between the first position and the second position, when feeding into the kneading cavity, each pair of feed bin covers rotates to the first position to form a feeding channel, reducing the amount of powder remaining on the inner wall of the box body and reducing powder dust, making it easier for the powder to enter the kneading cavity; each pair of feed bin covers rotates to the second position to close the kneading cavity, and the rotation of the rotor drives the residual powder on the inner surface of the feed bin cover to participate in kneading, thereby achieving self-cleaning of the kneading cavity and improving mixing efficiency and mixing quality.

[0045] Below, refer to Figures 1 to 8 Some embodiments of the present application are described in detail.

[0046] Figure 1 A top view of a kneading machine when a feed bin cover is in a first position provided in some embodiments of the present application; Figure 2 for Figure 1 Sectional view at AA in the middle; Figure 3 A top view of the kneading machine when the feed bin cover is in the second position provided in some embodiments of the present application; Figure 4 for Figure 3 Sectional view at the middle BB; Figure 5 A cross-sectional view of a discharge bin cover provided in some embodiments of the present application when the discharge bin cover is in a third position; Figure 6 A side view of a kneading machine provided for some embodiments of the present application; Figure 7 for Figure 3 Sectional view at CC; Figure 8 for Figure 4 A partial enlarged view of point D in the middle.

[0047] In some embodiments of the present application, for the convenience of explanation, the first direction, the second direction and the direction of gravity are set, and the directions of the first direction, the second direction and the direction of gravity are directions that intersect each other, and here, intersecting each other includes perpendicularly intersecting each other. For the convenience of understanding the embodiments of the present application, in the embodiments shown in Figures 1 to 7, the first direction, the second direction, and the direction of gravity are directions that intersect each other perpendicularly for explanation, but those skilled in the art should understand that the embodiments of the present application are not limited to the situation where the three directions intersect each other perpendicularly. For the convenience of explanation, as shown by the arrows in Figures 1 to 7, the direction of arrow X is the first direction, the direction of arrow Y is the second direction, and the direction of arrow Z is the direction of gravity. Sometimes the direction indicated by arrow Z along the direction of gravity is referred to as "below", and the opposite direction is referred to as "above".

[0048] A first aspect of an embodiment of the present application provides a kneading machine 1000. In the embodiment of the present application, the kneading machine 1000 includes a box body 100, a kneading cavity 200 and a rotor 300. The kneading cavity 200 is arranged in the box body 100, and the box body 100 is provided with a feeding port 111; the rotor 300 is rotatably arranged in the internal space of the kneading cavity 200 and the rotation axis is consistent with the first direction (X); the kneading cavity 200 includes a cavity body 210 and at least one pair of feeding bin covers 220, and the feeding bin covers 220 are rotatably connected to the cavity body 210, respectively, and the feeding bin covers 220 can rotate between a first position and a second position. In the first position, each pair of feeding bin covers 220 is open relative to the cavity body 210, and a feeding channel is formed between each pair of feeding bin covers 220, and the feeding channel connects the feeding port 111 and the internal space; in the second position, each pair of feeding bin covers 220 is configured to cover the cavity body 210.

[0049] It can be understood that the kneading machine 1000 is a device used for mixing and processing high-viscosity, elastic-plastic materials, and the shape of the box 100 can be designed according to specific needs.

[0050] In a specific embodiment, the box body 100 is a closed structure, which is roughly in the shape of a rectangular parallelepiped, and a kneading cavity 200 is provided in the internal space.

[0051] It is understandable that the feeding port 111 can be used to feed materials into the box body 100. Optionally, a feeding cover for opening and closing the feeding port 111 can be provided, which is not limited in the embodiment of the present application.

[0052] Optionally, the feeding port 111 may also be connected to a feeding belt, a feeding pipe, etc., which is not limited in the embodiment of the present application.

[0053] Exemplarily, the feeding port 111 may be located at the top of the box body 100 , and the material enters the box body 100 under the action of gravity.

[0054] Optionally, the number of the feeding ports 111 may be one or more. The multiple feeding ports 111 may be used to feed different types of materials. The shape of the feeding ports 111 may be circular, square, etc., which is not limited in the embodiment of the present application.

[0055] Exemplarily, the feeding port 111 may include a powder port and a glue port, wherein graphite powder may be fed into the powder port, and glue and solvent, such as water or N-methylpyrrolidone (NMP), may be fed into the glue port.

[0056] It can be understood that the rotor 300 is used to rotate and knead the materials and may have a spiral surface.

[0057] Optionally, a plurality of rotors 300 may be provided, and the spiral surfaces of the plurality of rotors 300 are staggered to avoid collision with each other during rotation. The space between the spiral surface and the kneading cavity 200 is used to accommodate the material, and the material is kneaded under the shearing action between the spiral surface and the inner wall surface of the kneading cavity 200.

[0058] The rotor 300 rotates around the rotating axis under the drive of the power equipment, and the rotation speed can be set according to the specific conditions such as the slurry being mixed; the rotor 300 can be a rotor 300 for a shearing type internal mixer. For example, the rotor 300 can be a two-edge shearing type, a four-edge shearing type, or a six-edge shearing type.

[0059] Exemplarily, the kneading cavity 200 is disposed in the box body 100 , and a cavity for kneading work is defined by an inner wall, and the inner wall can be fixed to the box body 100 .

[0060] It is understandable that the kneading chamber 200 will not interfere with or restrict the rotation of the rotor 300 .

[0061] Exemplarily, the kneading cavity 200 includes a cavity body 210 and at least one pair of feeding bin covers 220 , wherein the feeding bin covers 220 are rotatably connected to the cavity body 210 , and the feeding bin covers 220 can rotate between a first position and a second position.

[0062] It is understandable that the number of logarithms of the feed bin cover 220 can be designed according to actual conditions, such as the size of the box body 100, the length of the rotor 300, etc.

[0063] Optionally, the kneading chamber 200 includes a plurality of pairs of material feeding bin covers 220 , and the plurality of pairs of material feeding bin covers 220 may be arranged along the first direction (X).

[0064] Optionally, the feed bin cover 220 can be rotatably connected to the cavity body 210 via a rotating shaft, a pin shaft, a hinge, etc. It can be understood that when the feed bin cover 220 is in the second position, the rotating connection can be sealed to prevent material leakage.

[0065] Exemplarily, the kneading chamber 200 has a pair of feed bin covers 220, such as Figure 1 , Figure 2 As shown, in the first position, the feed bin cover 220 is open relative to the cavity body 210, and a feeding channel is formed between the pair of feed bin covers 220, the feeding channel connecting the feeding port 111 and the internal space. Figure 3 , Figure 4 As shown, in the second position, the feed bin cover 220 covers the cavity body 210. The dashed line in the figure is the edge of the feed bin cover 220.

[0066] It is understandable that the first position is not fixed, and is related to the number, position, and size of the feeding port 111 along the second direction (Y). When the feeding bin cover 220 is in the first position, the feeding port 111 is located between each pair of feeding bin covers 220 when viewed along the gravity direction (Z), so that the material enters the feeding port 111 and falls into the kneading cavity 200 through the feeding channel for subsequent kneading processing.

[0067] It is understandable that if the material is fed directly to the feeding port 111, the graphite powder will generate dust after being fed and adhere to the inner wall of the box 100, and the solvent will volatilize to wet the powder and strengthen the bonding, so that a large amount of material will adhere to the inner wall of the box 100, and it will be difficult to clean it up during kneading. In the embodiment of the present application, the feeding channel formed by the feed bin cover 220 can guide the material to fall, and the generated dust will only adhere to the inner surface of the feed bin cover 220; after the feed bin cover 220 is turned to the second position and the kneading machine 1000 starts kneading, the material adhered to the inner surface of the feed bin cover 220 is driven by the rotor 300 to participate in kneading, so as to realize the self-cleaning of the kneading cavity 200. In addition, the feeding method used in the embodiment of the present application is a closed feeding method, which can realize that the kneading cavity 200 is always in a closed state during the feeding and kneading process, and each part of the kneading cavity 200 will not leave the box 100 to contact the external environment, so as to realize the isolation of the internal environment of the equipment from the external environment.

[0068] It is understandable that, in the second position, each pair of feed bin covers 220 covers the cavity body 210. The feed bin covers 220 can cover the cavity body 210 in a partially stacked manner to achieve sealing of the kneading cavity 200.

[0069] Since the feed bin cover 220 can rotate between the first position and the second position, when feeding into the kneading cavity 200, each pair of feed bin covers 220 rotates to the first position to form a feeding channel, reducing the amount of powder remaining on the inner wall of the box body 100, and can reduce powder dust, making it easier for the powder to enter the kneading cavity 200; each pair of feed bin covers 220 rotates to the second position to close the kneading cavity 200, and the rotor 300 rotates to drive the residual powder on the inner surface of the feed bin cover 220 to participate in kneading, thereby achieving self-cleaning of the kneading cavity 200 and improving the mixing efficiency and mixing quality, further improving the slurry production quality.

[0070] In an embodiment of the present application, the box body 100 includes a top wall 110, which is arranged on one side of the box body 100 in the opposite direction of the gravity direction (Z), and the top wall 110 is provided with a feeding port 111; along both sides of the second direction (Y), each feed bin cover 220 includes a first end 221 and a second end 222, the second direction (Y) is perpendicular to the first direction (X) and the gravity direction (Z), and the second end 222 is rotatably connected to the cavity body 210; in the first position, the first end 221 of each pair of feed bin covers 220 is in contact with the top wall 110; in the second position, at least part of the first end 221 of each pair of feed bin covers 220 overlaps along the gravity direction (Z). Optionally, the top wall 110 may be fixed to other parts of the box body 100 , such as the side wall 120 , or may be rotatably connected to the side wall 120 , which is not limited in the embodiment of the present application.

[0071] Optionally, the first end portion 221 and the second end portion 222 may be a split structure or an integrally formed structure, which is not limited in the present embodiment of the application.

[0072] It can be understood that, in the first position, the first end 221 of each pair of hopper covers 220 is in contact with the top wall 110 , so that the material will not stick to the inner walls of the box body 100 on both sides along the second direction (Y).

[0073] Optionally, the box body 100 is generally made of metal, and the feed bin cover 220 is a moving part that generates friction during opening and closing, and can be made of non-metallic materials, such as polyester materials or composite materials. This embodiment of the application does not limit this.

[0074] For example, Figure 3 , 4 As shown, in the first position, the first end 221 of the feed bin cover 220 abuts against the top wall 110, and cooperates with the inner wall of the box body 100 along the first direction (X) to form a feeding channel connecting the feeding port 111 and the kneading cavity 200. The dashed line in the figure represents the edge of the feed bin cover 220.

[0075] Thus, each pair of feed bin covers 220 rotates to the first position to contact the top wall 110, further reducing the risk of dust adhering to the wall surface and being difficult to clean. When rotating to the second position, the overlap can enhance the sealing effect of the kneading cavity 200, further enhancing the mixing efficiency.

[0076] In the embodiments of the present application, Figure 4 As shown, when viewed along the first direction (X), the inner wall of the cavity body 210 and the feed bin cover 220 are both curved wall surfaces, and the rotor 300 has at least one ridge 301 , and the minimum distance between the ridge 301 and the curved wall surface is in the range of 2 to 7 mm. Exemplarily, the rotor 300 may have one ridge 301 or a plurality of ridges 301 , such as two ridges 301 , four ridges 301 , six ridges 301 , and the like.

[0077] As another example, the ridge 301 may be in the shape of a paddle, and the rotor 300 may be a simple stirring paddle or a cutting stirring paddle.

[0078] Optionally, the minimum distance between the convex ridge 301 and the curved wall surface may be 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm, etc. Other values ​​are not listed.

[0079] It is understandable that the shape of the curved wall can match the rotation trajectory of the convex ridge 301. After the feed bin cover 220 is covered on the cavity body 210, a sealed kneading cavity 200 is formed, and the rotor 300 rotates in the kneading cavity 200. The high shear field generated by the rotor 300 and the curved wall during the kneading process will take away the materials adhering to the surface of the curved wall, that is, the rotor 300 can not only make the materials on the inner wall of the cavity body 210 participate in the kneading during the kneading process, but also drive the materials adhered to the inner surface of the feed bin cover 220. These materials are adhered to the inner surface of the feed bin cover 220 when the materials fall or dust is generated during feeding. Therefore, the kneading machine 1000 realizes self-cleaning during the working process, and a separate cleaning step is omitted. In addition, the materials will be more densely subjected to the high shear dispersion effect generated by the rotor 300 and the wall, which improves the overall dispersion and mixing effect of the equipment, reduces the time of single mixing and kneading of materials, and improves production efficiency.

[0080] Since the distance between the rotor 300 and the curved wall is within a suitable range, the shear dispersion effect between the rotor 300 and the curved wall can be further enhanced, the mixing and dispersion degree of the materials can be improved, the time for single mixing and kneading of the materials can be reduced, and the production efficiency can be improved.

[0081] In the embodiment of the present application, the curvature of the second end portion 222 is in the range of π / 6-π / 3. It is understandable that the curvature of the second end portion 222 can be designed according to the size of the box body 100 , the size of the kneading cavity 200 , and the like.

[0082] It can be understood that the curvature of the curved wall of the second end portion 222 is in the range of π / 6-π / 3.

[0083] Therefore, the second end portion 222 is in a suitable arc, so that the torque and rotation efficiency of the driving rotation are suitable while taking into account the sealing effect of the first position and the second position, thereby reducing the mutual interference of each pair of hopper covers 220.

[0084] In the embodiment of the present application, along the first direction (X), the box body 100 includes two side walls 120 , and the two ends of the feed bin cover 220 along the first direction (X) are in contact with the side walls 120 .

[0085] For example, Figure 6 , Figure 7 As shown, the kneading cavity 200 has a pair of feeding bin covers 220 , and the two ends of the feeding bin covers 220 along the first direction (X) are in contact with the two side walls 120 respectively.

[0086] It can be understood that in the first position, a feeding channel is formed between each pair of feed bin covers 220 and the side wall 120, and the material may stick to the inner surface of the side wall 120. When the feed bin cover 220 is rotated to the second position, the material stuck to the inner surface of the side wall 120 can be scraped off and fall into the kneading cavity 200.

[0087] Since the side wall 120 is the box wall of the box body 100 in the first direction (X), the material adhering to the side wall 120 can be scraped off and brought to the kneading cavity 200 for kneading when the feed bin cover 220 is turned to the second position, thereby further improving the self-cleaning ability of the kneading machine 1000.

[0088] In the embodiment of the present application, at the second position, the first end portion 221 protrudes along the gravity direction (Z).

[0089] Optionally, a protrusion is formed on the first end portion 221 at one side close to the rotor 300 in the gravity direction (Z), so that in the second position, the first end portion 221 protrudes in the gravity direction (Z) and the lower surface is closer to the rotor 300 .

[0090] Optionally, both sides of the first end 221 along the gravity direction (Z) are bent along the gravity direction (Z) toward the side where the rotor 300 is located, so that in the second position, the first end 221 protrudes along the gravity direction (Z) and the lower surface is closer to the rotor 300.

[0091] For example, Figure 4 , Figure 5As shown, in the second position, both sides of the first end portion 221 along the gravity direction (Z) are bent along the gravity direction (Z) toward the side where the rotor 300 is located.

[0092] Exemplarily, the first end 221 of each pair of silo covers 220 protrudes along the gravity direction (Z), and in the second position, the two overlap.

[0093] For example, Figure 4 As shown, both sides of the first end 221 along the gravity direction (Z) are bent along the gravity direction (Z) toward the side where the rotor 300 is located. The first end 221 is in an arc shape, which is tangent to the shape of the second end 222, reducing the risk of the feed bin cover 220 being broken due to stress concentration.

[0094] Since the first end 221 protrudes along the gravity direction (Z), the feeding bin cover 220 in the second position can be made to penetrate deeper into the kneading cavity 200, thereby reducing the blind area volume of the rotor 300 rotating in the kneading cavity 200, making the rotor 300 cover a larger proportion of the field of action, making it easier for the material to be driven by the rotor 300, and further improving the mixing effect.

[0095] In the embodiment of the present application, the thickness H1 of the first end portion 221 is equal to half of the thickness H2 of the second end portion 222 . For example, Figure 2 As shown, the thickness H1 of the first end portion 221 is less than the thickness H2 of the second end portion 222. In the second position, as shown in FIG. Figure 4 As shown, the two first ends 221 match in shape and seal the kneading cavity 200 after being overlapped. The overlap thickness is equal to the thickness H2 of the second end 222 to prevent leakage or backflow of materials during the kneading process.

[0096] Since the thickness of the first end portion 221 is equal to half of the thickness of the second end portion 222 , it is convenient for the first end portions 221 of each pair of feed bin covers 220 to overlap at the second position.

[0097] In the embodiment of the present application, the rotor 300 includes a first rotor 310 and a second rotor 320 disposed in the kneading cavity 200 along the second direction (Y), and the rotation axes of the first rotor 310 and the second rotor 320 are parallel on both sides along the second direction (Y).

[0098] For example, Figure 2 , Figure 4 As shown, two rotors 300 are arranged in the kneading chamber 200 .

[0099] It can be understood that the first rotor 310 and the second rotor 320 can rotate towards each other at a differential speed, and the shear fields of the two are superimposed on each other, so that efficient mixing is achieved through shearing, folding, extrusion and other effects.

[0100] Optionally, the ridges 301 of the first rotor 310 and the second rotor 320 may mesh with each other, which is not limited in the present embodiment.

[0101] Since two rotors 300 are arranged in the kneading cavity 200, the two rotors 300 achieve material dispersion and kneading through rotation, reduce the kneading blind area, and improve the mixing effect.

[0102] In the embodiments of the present application, Figure 6 , Figure 7 As shown, the kneading machine 1000 also includes a discharge mechanism 400 arranged at the bottom of the kneading cavity 200, the discharge mechanism 400 includes a discharge bin 410, the discharge bin 410 includes a discharge cavity 411 and a discharge screw 420 arranged in the discharge cavity 411, the discharge cavity 411 is connected to the kneading cavity 200, and the discharge screw 420 is configured to push the kneaded material to move to the discharge port 430 of the discharge bin 410 by rotating. It can be understood that the kneaded material is in a clumping state and can be transferred from the kneading cavity 200 to the discharge cavity 411 under the action of gravity and the push of the rotor 300 , and the kneaded material can be discharged by the rotation of the discharge screw 420 .

[0103] Illustratively, the discharge screw 420 may extend along a first direction (X).

[0104] Exemplarily, the discharge screw 420 may be a screw in a single screw pump.

[0105] Optionally, the wall of the discharge bin 410 is made of non-metallic material to avoid friction with the discharge screw 420 so that the kneaded material is not mixed with metal particles.

[0106] Since the kneading machine 1000 also includes a discharge mechanism 400 arranged at the bottom, the discharge screw 420 in the discharge mechanism 400 can transport the kneaded material for discharge. Therefore, discharging the material through the discharge screw 420 can reduce the downtime for discharging, improve the continuous discharge capacity of the discharge mechanism 400, and improve the production efficiency of the kneading machine 1000 while also improving the airtightness of the kneading machine 1000.

[0107] In an embodiment of the present application, the discharge mechanism 400 also includes a discharge bin cover 440, which is disposed between the discharge cavity 411 and the kneading cavity 200; in the third position, the discharge bin cover 440 abuts against the inner wall of the cavity body 210 and separates the kneading cavity 200 and the discharge cavity 411. For example, Figure 8 As shown, in the third position, the discharge bin cover 440 abuts against the inner wall of the cavity body 210 and separates the kneading cavity 200 and the discharge cavity 411 . Optionally, the discharge bin cover 440 can be moved to the third position by rotating or sliding.

[0108] It is understandable that during the feeding and kneading process, the discharge bin cover 440 is in the third position, separating the kneading cavity 200 and the discharge cavity 411. The discharge cavity 411 is the working dead zone of the rotor 300 during the kneading process. After the discharge screw 420 turns back to push the material back into the cavity, some materials will still remain in the bottom discharge bin, which is not fully stirred and dispersed, resulting in unqualified kneading and dispersion of some materials; and during operation, the upper rotor 300 will exert pressure downward on the discharge screw 420, and long-term operation will cause the discharge screw 420 to deform, and eventually cause the wall to be scraped. Therefore, after setting the discharge bin cover 440, it can prevent the powder from falling into the discharge bin 410 and causing the discharge screw 420 to deform under pressure, thereby improving the quality of the kneaded material and extending the service life of the discharge screw 420 and the bearings.

[0109] Optionally, during the discharging process, the discharging bin cover 440 may not be in the third position, so that the kneading cavity 200 and the discharging cavity 411 are connected to facilitate the discharging.

[0110] Optionally, the discharge bin cover 440 may be made of non-metallic material to avoid friction with the discharge screw 420 that may cause the kneaded material to be mixed with metal particles.

[0111] Since the discharge bin cover 440 can separate the kneading chamber 200 and the discharge chamber 411, the discharge bin cover 440 is in the third position during the feeding and kneading process, closing the discharge chamber 411 to prevent powder from falling into the discharge chamber 411 and causing the discharge screw 420 to deform under pressure, thereby further improving product quality and extending the service life of the discharge screw 420.

[0112] In the embodiment of the present application, the discharge bin cover 440 is configured to rotate around the first direction (X) to a third position and be slidably connected to the outer wall of the discharge bin 410 . It can be understood that the discharge bin 410 has an opening on the side facing the kneading cavity 200 , and the discharge bin cover 440 closes the opening when it is in the third position, thereby separating the kneading cavity 200 and the discharge cavity 411 .

[0113] For example, Figure 8 As shown, the discharge bin cover 440 can be driven by a gear rack and driven by a motor (not shown in the figure) to achieve precise control of the position.

[0114] As another example, the outer wall of the discharge bin 410 may be provided with a guide surface, and the discharge bin cover 440 may be provided in an arc shape, and slidably connected to the outer wall of the discharge bin 410. The guide surface may be a slide rail, a groove, or the like.

[0115] Optionally, a monitoring sensor, a monitoring switch, etc. may be provided to limit the position of the discharge bin cover 440. The embodiment of the present application does not limit this.

[0116] Alternatively, the discharge bin cover 440 may be rotated relative to the discharge bin 410 by means of a rotating shaft, a pin shaft, a hinge shaft, etc., which is not limited in the embodiments of the present application.

[0117] Thus, the sliding connection between the discharge bin cover 440 and the outer wall of the discharge bin 410 can make the contact surface fit closely during the rotation process, reduce the gap leakage caused by rotation, and improve the sealing reliability. In addition, the combination of rotation and sliding can accurately control the opening of the discharge port to achieve uniform discharge.

[0118] In the embodiments of the present application, Figure 7 As shown, the discharge mechanism 400 also includes a discharge flange 450, a support frame 460 and a cutting mechanism 470. The discharge port 430 is provided with a discharge flange 450, and the discharge flange 450 is connected to the discharge port 430 through the support frame 460. The cutting mechanism 470 is arranged on the discharge side of the discharge flange 450 for cutting off the kneaded material. It is understandable that during the discharging process, the discharging bin cover 440 above the discharging screw 420 needs to be opened, and the rotor 300 and the discharging screw 420 work simultaneously. The rotor 300 applies downward pressure, the driving end of the discharging screw 420 is fixed by the bearing, and the discharging end is supported by the support frame 460, so as to realize the simply supported structure of the discharging screw 420, reduce the overall deformation of the discharging screw 420, and prevent the generation of metal debris by scraping the wall.

[0119] Optionally, a shaft sleeve may be provided on the support frame 460 to connect the discharge flange 450 .

[0120] Optionally, the shape and structure of the discharge flange 450 can be adjusted according to the discharge port 430 and the material, and is not limited to the shape shown in the figure.

[0121] Exemplarily, the cutting mechanism 470 may include a cutter, which is fixed near the discharge port 430 and is normally closed during the feeding and kneading process, and intermittently falls down to cut the kneaded material discharged from the discharge flange 450 after the discharge screw 420 is running.

[0122] In the embodiment of the present application, a hard alloy coating is provided on the inner wall of the cavity body 210 , the surface of the rotor 300 , and the surface of the discharge screw 420 .

[0123] It can be understood that the inner wall of the cavity body 210, the surface of the rotor 300 and the surface of the discharge screw 420 are in a high humidity, high pressure and high temperature state for a long time, and are subjected to strong shearing during the kneading process. Therefore, metal material is selected as the base to ensure its strength, and then a high-strength coating is provided to prevent rust and wear.

[0124] Exemplarily, cemented carbide includes, but is not limited to, tungsten carbide and titanium nitride.

[0125] Optionally, the surface of the cemented carbide coating may be polished to make the surface smoother and cleaner, thereby reducing the bonding strength and bonding force between the rotor 300 and the curved wall surface and improving the kneading self-cleaning effect.

[0126] Since the inner wall of the cavity body 210, the rotor 300 and the discharge screw 420 are in a high humidity, high pressure and high temperature state for a long time and are subjected to strong shearing during the kneading process, the hard alloy coating provided on their surface can prevent rust and wear and increase their service life.

[0127] In the embodiment of the present application, each feed bin cover 220 is drivingly connected to at least one gas-liquid booster cylinder 500 .

[0128] For example, Figure 6 As shown, each feed bin cover 220 is drivingly connected to two gas-liquid booster cylinders 500. The two gas-liquid booster cylinders 500 are arranged along the first direction (X) to improve the force condition of the feed bin cover 220 in the first direction (X).

[0129] It is understandable that the inner wall of the feed bin cover 220 will bear a lot of pressure during the kneading process. A gas-liquid booster cylinder 500 with more stable work and greater pressure is selected to pressurize the feed bin cover 220 to prevent the feed bin cover 220 from shifting during the kneading process and destroying the sealing of the kneading cavity 200.

[0130] Therefore, the gas-liquid booster cylinder 500 can provide high-pressure output, cooperate with the feed bin cover 220 to seal the kneading cavity 200, and the pressure is stable, preventing the feed bin cover 220 from moving during the kneading process and causing the kneading cavity 200 to fail to seal.

[0131] The second aspect of the embodiment of the present application further provides a kneading method. In the embodiment of the present application, the kneading method is applied to a kneading machine 1000, which includes a box 100, a kneading cavity 200 and a rotor 300. The kneading cavity 200 is arranged in the box 100, and the box 100 is provided with a feeding port 111; the rotor 300 is rotatably arranged in the inner space of the kneading cavity 200 and the rotation axis is consistent with the first direction (X). The kneading cavity 200 includes a cavity main body 111. The cavity body 210 and at least one pair of feed bin covers 220, the feed bin covers 220 are rotatably connected to the cavity body 210, and the feed bin covers 220 can rotate between a first position and a second position. In the first position, each pair of feed bin covers 220 is open relative to the cavity body 210, and a feeding channel is formed between each pair of feed bin covers 220, and the feeding channel connects the feeding port 111 and the internal space; in the second position, each pair of feed bin covers 220 is configured to cover the cavity body 210.

[0132] The kneading method comprises the following steps: Feeding step: each pair of feed bin covers 220 rotates to a first position to form a feeding channel, and feeds materials to the feeding port 111; Kneading step: each pair of feed bin covers 220 rotates to the second position, and the rotor 300 rotates to knead the material.

[0133] In a specific embodiment, when feeding, the gas-liquid booster cylinder 500 first drives each pair of feed bin covers 220 to rotate to the first position to form a feeding channel, and the discharge bin cover 440 rotates to the third position, and then feeds to the feeding port 111; after the feeding is completed, each pair of feed bin covers 220 rotates to the second position to close the kneading cavity 200, and the dual rotors 300 rotate in different directions and at different speeds to knead the material.

[0134] In a specific embodiment, the kneading method also includes a discharge step: the discharge bin cover 440 leaves the third position, the discharge chamber 411 is connected to the kneading chamber 200, the discharge screw 420 and the rotor 300 rotate to push the kneaded material outward, and the kneaded material is extruded through the discharge flange 450 to form a columnar material, and the cutting mechanism 470 divides the columnar material.

[0135] Therefore, the kneading method provided in the second aspect of the embodiment of the present application can reduce the undesirable situation of powder solidification and residue on the inner wall of the kneading machine 1000 when feeding, and can also improve the mixing efficiency and product quality of the kneading machine 1000 while achieving self-cleaning of the kneading cavity 200.

[0136] The specific scheme of the embodiment of the present application is described below in conjunction with the accompanying drawings.

[0137] In the lithium battery coating process, the mixing production of slurry is a key link. The quality of slurry mixing production directly affects the quality of the coating process. The inner cavity of the traditional kneading machine is widely used in mixing colloids and kneading powders, but the difficulty in cleaning large kneading machines has always been one of the problems that have long plagued production quality. During the feeding process, the powder will be put into the kneading machine, which will generate dust. The dust will fill the silo and exceed the kneading range of the rotor, causing the inner wall of the silo to accumulate dry powder residue. If the powder adhered to the wall falls off and falls into the newly made slurry, it will affect the quality of the manufacturing process and further affect the battery performance.

[0138] This embodiment provides a kneading machine 1000 with excellent mixing effect and capable of achieving self-cleaning of the silo.

[0139] The kneading machine 1000 includes a box body 100, a kneading cavity 200 and a rotor 300. The kneading cavity 200 is arranged in the box body 100, and the box body 100 is provided with a feeding port 111; the rotor 300 is rotatably arranged in the internal space of the kneading cavity 200 and the rotation axis is consistent with the first direction (X); the kneading cavity 200 includes a cavity body 210 and at least one pair of feeding bin covers 220, and the feeding bin covers 220 are rotatably connected to the cavity body 210, respectively, and the feeding bin covers 220 can rotate between a first position and a second position. In the first position, each pair of feeding bin covers 220 is open relative to the cavity body 210, and a feeding channel is formed between each pair of feeding bin covers 220, and the feeding channel connects the feeding port 111 and the internal space; in the second position, each pair of feeding bin covers 220 is configured to cover the cavity body 210.

[0140] The kneading machine 1000 is driven by the gas-liquid booster cylinder 500 to rotate the feed bin cover 220 to achieve the actions of opening the bin for feeding and closing the bin for kneading. During the process of opening the bin for feeding, the gas-liquid booster cylinder 500 contracts, driving the feed bin cover 220 to rotate and open the bin. The feed bin cover 220 and the upper cover are engaged with each other to form a closed feed channel to prevent powder from falling into the gap between the side chambers. The gas-liquid booster cylinder 500 extends out, and the feed bin cover 220 closes to form a kneading cavity 200 with the cavity body 210. The high shear field generated by the rotor 300 and the wall during the kneading process will carry away the material stuck to the wall surface to achieve a self-cleaning function. The design of the chamber structure not only achieves self-cleaning during operation, but also has the function of improving mixing efficiency. Figure 4 In the kneading cavity 200, the material will be more densely subjected to the high shear dispersion effect generated by the rotor 300 and the wall surface, thereby improving the overall dispersion and mixing effect of the equipment, reducing the time for single mixing and kneading of materials, and improving production efficiency.

[0141] During the kneading process, the feed bin cover 220 overlaps and closes the kneading cavity 200, which interacts with the rotor 300. The rotor 300 drives the formed slurry to adhere to the residual material on the wall, and finally the agglomerated material is discharged from the kneading cavity 200, realizing the self-cleaning function. In addition, the probability of the material in the kneading cavity 200 undergoing high shear with the wall under the action of the rotor 300 is twice that of the traditional cavity. The strong shear field formed will make the powder and slurry more mixed and dispersed, and improve the production efficiency of the kneading process.

[0142] In a specific embodiment, in order to facilitate the mass material to enter the next process, a discharge mechanism 400 is installed at the bottom of the equipment. However, the discharge bin 410 is the working dead zone of the rotor 300 during the kneading process. After the discharge screw 420 reverses and pushes the material back into the kneading cavity 200, some materials will still remain in the bottom discharge bin 410, and they are not fully stirred and dispersed, resulting in unqualified kneading and dispersion of some materials. In addition, during operation, the upper rotor 300 will exert pressure downward on the discharge screw 420. Long-term operation will cause the discharge screw 420 to deform and eventually scrape the wall. Therefore, a rotatable discharge bin cover 440 is set above the discharge screw 420, which is closed during the feeding and kneading process to prevent the powder from falling into the discharge bin 410 and causing the discharge screw 420 to deform under pressure. Improve the quality of the kneaded material and extend the service life of the discharge screw 420 and the bearing.

[0143] In a specific embodiment, during the discharging process, the discharging bin cover 440 above the discharging screw 420 needs to be opened, and the rotor 300 and the discharging screw 420 work simultaneously. The rotor 300 applies downward pressure, the driving end of the discharging screw 420 is fixed by the bearing, and the discharging end is supported by the support frame 460 and the sleeve, so as to realize the simple support structure of the discharging screw 420, reduce the overall deformation of the discharging screw 420, and prevent wall scraping.

[0144] In a specific embodiment, the use of non-metallic structures for moving parts can effectively reduce the inflow of metal particles. For example, the feed bin cover 220 and the discharge bin cover 440 are moving parts, and friction will occur during opening and closing, and the microparticles of the parts will fall off, so non-metallic materials are used. The discharge screw 420 has the risk of deformation and wall scraping during operation, but due to strength limitations, the discharge screw 420 needs to be a metal structure, so the use of non-metallic materials for the wall of the discharge bin 410 can effectively prevent the friction between the wall and the metal screw to produce metal particles.

[0145] In a specific embodiment, the kneading chamber wall needs to be in a high humidity, high pressure, and high temperature state for a long time, and is subjected to strong shearing during the kneading process, so a metal material needs to be selected as the base to ensure its strength. However, metal has the risk of wear and corrosion, so a high-strength hard alloy coating needs to be introduced to prevent corrosion and wear. In addition, the coating surface can be polished twice to reduce the adhesive force.

[0146] In a specific embodiment, the inner wall of the feed bin cover 220 will bear a pressure of more than 1 ton during the kneading process. For this reason, a gas-liquid booster cylinder 500 with more stable work and higher pressure is selected to pressurize the feed bin cover 220 to prevent the feed bin cover 220 from shifting and destroying the sealing during the kneading process.

[0147] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0148] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0149] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, it is mentioned that the method may also include step (c), which means that step (c) can be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0150] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of protection requested in the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of protection requested.

Claims

1. A kneading machine, characterized in that: It includes a box, a kneading chamber and a rotor. The kneading cavity is arranged in the box body, and the box body is provided with a feeding port; The rotor is rotatably disposed in the inner space of the kneading cavity and the rotation axis is consistent with the first direction. The kneading cavity includes a cavity body and at least one pair of feeding bin covers, and the feeding bin covers are rotatably connected to the cavity body, respectively, and the feeding bin covers can rotate between a first position and a second position. In the first position, each pair of the feed bin covers is open relative to the cavity body, and a feeding channel is formed between each pair of the feed bin covers, the feeding channel connecting the feeding port and the internal space; In the second position, each pair of the feed bin covers is configured to cover the cavity body.

2. The kneading machine according to claim 1, characterized in that The box body comprises a top wall, the top wall is arranged on one side of the box body in the opposite direction of the gravity direction, and the top wall is provided with the feeding port; Along both sides of the second direction, each of the feed bin covers includes a first end and a second end, the second direction is perpendicular to the first direction and the gravity direction, and the second end is rotatably connected to the cavity body; In the first position, the first end of each pair of the feed bin covers is in contact with the top wall; In the second position, at least portions of the first ends of each pair of the feed bin covers overlap along the gravity direction.

3. The kneading machine according to claim 2, characterized in that The inner wall of the cavity body and the feed bin cover are both curved wall surfaces, the rotor has at least one convex ridge, and the minimum distance between the convex ridge and the curved wall surface is in the range of 2 to 7 mm.

4. The kneading machine according to claim 3, characterized in that The arc of the second end is in the range of π / 6-π / 3.

5. The kneading machine according to claim 2, characterized in that Along the first direction, the box body includes two side walls, and both ends of the feed bin cover along the first direction are in contact with the side walls.

6. The kneading machine according to claim 2, characterized in that In the second position, the first end protrudes along the direction of gravity.

7. The kneading machine according to claim 2, characterized in that The thickness of the first end portion is equal to half the thickness of the second end portion.

8. The kneading machine according to claim 2, characterized in that The rotor comprises a first rotor and a second rotor arranged in the kneading cavity along the second direction, and the rotation axes of the first rotor and the second rotor are parallel on both sides along the second direction.

9. The kneading machine according to any one of claims 2 to 8, characterized in that The kneading machine also includes a discharge mechanism arranged at the bottom of the kneading cavity, the discharge mechanism includes a discharge bin, the discharge bin includes a discharge cavity and a discharge screw arranged in the discharge cavity, the discharge cavity is connected to the kneading cavity, and the discharge screw is configured to push the kneaded material to move to the discharge port of the discharge bin by rotating.

10. The kneading machine according to claim 9, characterized in that The discharge mechanism further comprises a discharge bin cover, which is arranged between the discharge cavity and the kneading cavity; in the third position, the discharge bin cover abuts against the inner wall of the cavity body and separates the kneading cavity and the discharge cavity.

11. The kneading machine according to claim 10, characterized in that The discharge bin cover is configured to rotate about the first direction to the third position and be slidably connected to the outer wall of the discharge bin.

12. The kneading machine according to claim 9, characterized in that The discharge mechanism also includes a discharge flange, a support frame and a cutting mechanism. The discharge port is provided with a discharge flange, and the discharge flange is connected with the discharge port through the support frame. The cutting mechanism is arranged on the discharge side of the discharge flange and is used to cut off the kneaded material.

13. The kneading machine according to claim 9, characterized in that The inner wall of the cavity body, the surface of the rotor and the surface of the discharge screw are provided with a hard alloy coating.

14. The kneading machine according to any one of claims 1 to 8, characterized in that Each of the feed bin covers is drivingly connected to at least one gas-liquid booster cylinder.

15. A kneading method, characterized in that: The kneading method is applied to a kneading machine, which comprises a box, a kneading cavity and a rotor. The kneading cavity is arranged in the box body, and the box body is provided with a feeding port; The rotor is rotatably disposed in the inner space of the kneading cavity and the rotation axis is consistent with the first direction. The kneading cavity includes a cavity body and at least one pair of feeding bin covers, and the feeding bin covers are rotatably connected to the cavity body, respectively, and the feeding bin covers can rotate between a first position and a second position. In the first position, each pair of the feed bin covers is open relative to the cavity body, and a feeding channel is formed between each pair of the feed bin covers, the feeding channel connecting the feeding port and the internal space; In the second position, each pair of the feed bin covers is configured to cover the cavity body; The kneading method comprises the following steps: Each pair of feed bin covers rotates to the first position to form the feeding channel, and feeds materials to the feeding port; Each pair of the feed bin covers rotates to the second position, and the rotor rotates to knead the material.

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