Kneader and kneading method

Abstract

The present application discloses a kneader and a kneading method. The kneader includes a box body, a kneading cavity and a rotor. The kneading cavity is arranged inside the box body, and the box body is provided with a feeding port; the rotor is rotatably arranged in the inner space of the kneading cavity and the rotation axis is consistent with the first direction. The kneading cavity includes a cavity main body and at least a pair of feed bin covers. The feed bin covers are respectively rotatably connected to the cavity main body. The feed bin covers can rotate between a first position and a second position. In the first position, each pair of feed bin covers is opened relative to the cavity main body, and a feeding channel is formed between each pair of feed bin covers. The feeding channel communicates the feeding port with the inner space; in the second position, each pair of feed bin covers is configured to cover the cavity main body. Through the present application, the amount of powder remaining on the inner wall of the kneader can be reduced, so that the powder can more easily enter the kneading cavity centrally, and while realizing self-cleaning of the kneading cavity, the mixing efficiency and mixing quality can also be improved.

Description

Technical Field

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

[0002] During the lithium battery coating process, it is necessary to mix and produce battery slurry. In the production process of, for example, high-solid-content dry battery slurry, the mixing effect of the slurry directly affects the processing quality of subsequent processes such as coating and cold pressing, and ultimately may affect the quality of the produced battery and the qualified rate of finished products. At present, kneaders are widely used in the mixing of high-solid-content dry battery slurry.

[0003] During the feeding process of producing battery slurry, dust will be generated when the powder is put into the kneader, resulting in the accumulation and adhesion of dry powder residues on the inner wall of the kneader, which cannot be removed in time, affecting the yield rate of the manufacturing process and the production quality of the battery. Therefore, how to provide a kneader with no dry powder residue on the inner wall during the kneading production process is one of the research topics in the industry. Summary of the Invention

[0004] To solve the above technical problems, the present application provides a kneader and a kneading method.

[0005] The present application is achieved through the following technical solutions.

[0006] A first aspect of an embodiment of the present application provides a kneader, including a box body, a kneading cavity, and a rotor.

[0007] The kneading cavity is arranged inside the box body, and the box body is provided with a feeding port.

[0008] 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 main body and at least a pair of feeding chamber covers. The feeding chamber covers are respectively rotatably connected to the cavity main body, and the feeding chamber covers can rotate between a first position and a second position.

[0009] In the first position, each pair of the feeding chamber covers is opened relative to the cavity main body, and a feeding channel is formed between each pair of the feeding chamber covers. The feeding channel communicates the feeding port with the internal space.

[0010] In the second position, each pair of the feeding chamber covers is configured to cover the cavity main body.

[0011] Since the charging bin cover can rotate between the first position and the second position, when feeding the kneading cavity, each pair of charging 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 capable of reducing powder dusting, making it easier for the powder to concentrate and enter the kneading cavity; each pair of charging 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 charging bin cover to participate in kneading, realizing self-cleaning of the kneading cavity while also improving the mixing efficiency and mixing quality.

[0012] In some embodiments, the box body includes a top wall, the top wall is disposed 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 in the second direction, each charging bin cover 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 main body; in the first position, the first ends of each pair of charging bin covers contact the top wall; in the second position, at least a part of the first ends of each pair of charging bin covers overlap along the gravity direction.

[0013] Thus, when each pair of charging bin covers rotates to the first position to contact the top wall, the adverse risk of dust adhering to the wall surface and being difficult to clean is further reduced. When rotating to the second position, the overlapping can improve the sealing effect of the kneading cavity and further improve the mixing efficiency.

[0014] In some embodiments, the inner wall of the cavity main body and the charging bin cover are both curved wall surfaces, the rotor has at least one convex rib, and the minimum distance between the convex rib and the curved wall surface is in the range of 2 to 7 mm.

[0015] Since the distance between the rotor and the curved wall surface is in a suitable range, the shearing and dispersing effect generated by the rotor and the curved wall surface can be further improved, the degree of mixing and dispersion of the material can be increased, the time for single-time kneading of the material can be reduced, and the production efficiency can be improved.

[0016] In some embodiments, the radian of the second end is in the range of π / 6 - π / 3.

[0017] Thus, the second end has a suitable radian, making the driving torque and rotation efficiency appropriate while also taking into account the sealing effects of the first position and the second position, and reducing the mutual interference between each pair of charging bin covers.

[0018] In some embodiments, along the first direction, the box body includes two side walls, and both ends of the charging bin cover in the first direction contact the respective side walls.

[0019] 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.

[0020] In some embodiments, in the second position, the first end protrudes along the direction of gravity.

[0021] 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.

[0022] In some embodiments, the thickness of the first end portion is equal to half the thickness of the second end portion.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In some embodiments, each of the feed bin covers is drivingly connected to at least one gas-liquid booster cylinder.

[0036] 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.

[0037] The second aspect of the embodiments of the present application further provides a kneading method, which is applied to a kneading machine. The kneading machine includes a box body, a kneading cavity and a rotor. The kneading cavity is arranged in the box body, and a feeding port is formed 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 main body and at least a pair of feeding hopper covers. The feeding hopper covers are respectively rotatably connected to the cavity main body. The feeding hopper covers can rotate between a first position and a second position. In the first position, each pair of the feeding hopper covers is opened relative to the cavity main body, and a feeding channel is formed between each pair of the feeding hopper covers. The feeding channel communicates the feeding port with the internal space; in the second position, each pair of the feeding hopper covers is configured to cover the cavity main body;

[0038] The kneading method includes the following steps:

[0039] Each pair of the feeding hopper covers rotates to the first position to form the feeding channel, and feeds materials into the feeding port;

[0040] Each pair of the feeding hopper covers rotates to the second position, and the rotor rotates to knead the materials.

[0041] Thus, the kneading method provided by the second aspect of the embodiments of the present application can reduce the bad situation of powder consolidation and residue on the inner wall of the kneading machine during feeding, and can improve the mixing efficiency and product quality of the kneading machine while realizing self-cleaning of the kneading cavity.

[0042] 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, so that the powder can more easily enter the kneading cavity concentratedly, and the mixing efficiency and mixing quality can be improved while realizing self-cleaning of the kneading cavity. Description of the Drawings

[0043] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0044] Figure 1 is a top view of the kneading machine when the feeding hopper cover is in the first position provided by some embodiments of the present application;

[0045] Figure 2 is Figure 1 a cross-sectional view taken along line A-A in

[0046] Figure 3 is a top view of the kneading machine when the feeding hopper cover is in the second position provided by some embodiments of the present application;

[0047] Figure 4 For Figure 3 Cross-sectional view taken along line B-B in

[0048] Figure 5 Cross-sectional view of the discharge bin cover in the third position provided by some embodiments of the present application

[0049] Figure 6 Side view of the kneader provided by some embodiments of the present application

[0050] Figure 7 For Figure 3 Cross-sectional view taken along line C-C in

[0051] Figure 8 For Figure 4 Partially enlarged view at D in

[0052] Explanation of reference numerals

[0053] 1000, kneader; 100, box body; 110, top wall; 111, feeding port; 120, side wall; 200, kneading cavity; 210, cavity main body; 220, feeding bin cover; 221, first end; 222, second end; 300, rotor; 301, convex rib; 310, first rotor; 320, second rotor; 400, discharging mechanism; 410, discharging bin; 411, discharging cavity; 420, discharging screw; 430, discharging port; 440, discharging bin cover; 450, discharging flange; 460, support frame; 470, cutting mechanism; 500, gas-liquid intensifying cylinder. Detailed implementation manners

[0054] Hereinafter, embodiments of the technical solutions of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and thus are only examples and cannot be used to limit the protection scope of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in this text and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0056] In the description of the embodiments of the present application, technical terms such as "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 quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means more than two unless otherwise specifically defined.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] Below, this application is described in detail.

[0064] At present, new energy batteries are increasingly widely used in life and industry. New energy batteries are not only applied to energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in many fields such as aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0065] In the process of lithium battery coating technology, it is necessary to mix and produce battery slurry. In, for example, the production process of high-solid dry battery slurry, the mixing effect of the slurry will directly affect the processing quality of subsequent processes such as coating and cold pressing, and ultimately may affect the quality of the produced battery and the qualified rate of finished products. At present, kneaders are widely used in the mixing of high-solid dry battery slurry. During the feeding process of producing battery slurry, dust will be generated when the powder is put into the kneader, resulting in the accumulation and adhesion of dry powder residues on the inner wall of the kneader, which cannot be removed in time, affecting the excellent rate of the manufacturing process and the production quality of the battery. Therefore, how to provide a kneader with no dry powder residue on the inner wall during the kneading production process is one of the research topics in the industry.

[0066] Through research and design, the kneading cavity is set to have a structure with a rotatable feed hopper cover. After each pair of feed hopper covers rotates, a feeding channel is formed in the middle, connecting the feeding port and the kneading cavity, so that the dust of the powder cannot adhere to the inner wall of the kneader. The feed hopper cover closes the kneading cavity during the kneading process, and the powder adhering to the surface of the feed hopper cover can be driven by the rotor and separated from the feed hopper cover to participate in the kneading process, reducing material waste and achieving the self-cleaning effect of the kneading cavity and the feed hopper cover.

[0067] Based on such a design concept, the present application designs a kneader, which includes a box body, a kneading cavity, and a rotor. The kneading cavity is arranged inside the box body, and the box body is provided with a feeding port; the rotor is rotatably arranged in the inner space of the kneading cavity and the rotation axis is consistent with the first direction. The kneading cavity includes a cavity main body and at least a pair of feed hopper covers, and the feed hopper covers are respectively rotatably connected to the cavity main body. The feed hopper cover can rotate between a first position and a second position. In the first position, each pair of feed hopper covers is opened relative to the cavity main body, and a feeding channel is formed between each pair of feed hopper covers, and the feeding channel connects the feeding port and the inner space; in the second position, each pair of feed hopper covers is configured to cover the cavity main body.

[0068] Since the charging bin cover can rotate between the first position and the second position, when feeding the kneading cavity, each pair of charging 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, and can reduce powder dust, making it easier for the powder to concentrate and enter the kneading cavity; each pair of charging 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 charging bin cover to participate in kneading, realizing self-cleaning of the kneading cavity while also improving the mixing efficiency and mixing quality.

[0069] Next, with reference to Figures 1 to 8 Some embodiments of the present application will be described in detail.

[0070] Figure 1 The top view of the kneader when the charging bin cover provided in some embodiments of the present application is in the first position; Figure 2 is Figure 1 the cross-sectional view taken along line A-A in Figure 3 The top view of the kneader when the charging bin cover provided in some embodiments of the present application is in the second position; Figure 4 is Figure 3 the cross-sectional view taken along line B-B in Figure 5 The cross-sectional view of the discharging bin cover in the third position provided in some embodiments of the present application; Figure 6 The side view of the kneader provided in some embodiments of the present application; Figure 7 is Figure 3 the cross-sectional view taken along line C-C in Figure 8 is Figure 4 the partial enlarged view at D in

[0071] In some embodiments of the present application, for the convenience of description, a first direction, a second direction, and a gravity direction are set. The directions in which the first direction, the second direction, and the gravity direction are located are directions that cross each other. Here, crossing each other includes perpendicular crossing. For the convenience of understanding the embodiments of the present application, in the embodiments shown in FIGS. 1 to 7, an example in which the first direction, the second direction, and the gravity direction are perpendicular to each other is used for description. However, those skilled in the art should understand that the embodiments of the present application are not limited to the case where the three directions are perpendicular to each other. For the convenience of description, as shown by the arrows in FIGS. 1 to 7, the direction in which the arrow X is located is the first direction, the direction in which the arrow Y is located is the second direction, and the direction in which the arrow Z is located is the gravity direction. Sometimes, the direction in which the arrow Z points along the gravity direction is also referred to as "downward", and the opposite direction is referred to as "upward".

[0072] A first aspect of an embodiment of the present application provides a kneader 1000. In an embodiment of the present application, the kneader 1000 includes a box body 100, a kneading cavity 200, and a rotor 300. The kneading cavity 200 is disposed inside the box body 100, and the box body 100 is provided with a feeding port 111. The rotor 300 is rotatably disposed 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 main body 210 and at least a pair of feeding bin covers 220. The feeding bin covers 220 are respectively rotatably connected to the cavity main body 210. 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 opened relative to the cavity main body 210, and a feeding channel is formed between each pair of feeding bin covers 220. The feeding channel communicates the feeding port 111 with the internal space. In the second position, each pair of feeding bin covers 220 is configured to cover the cavity main body 210.

[0073] It can be understood that the kneader 1000 is a device for mixing and processing high-viscosity, elastoplastic materials, and the shape of the box body 100 can be designed according to specific needs.

[0074] In a specific embodiment, the box body 100 is a closed structure, generally in a cuboid shape, and the kneading cavity 200 is disposed in the internal space.

[0075] It can be understood 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, and the embodiments of the present application do not make any limitations in this regard.

[0076] Optionally, the feeding port 111 can also be communicated with a feeding belt, a feeding pipeline, etc., and the embodiments of the present application do not make any limitations in this regard.

[0077] Exemplarily, the feeding port 111 can be located at the top of the box body 100, and the material enters the box body 100 under the action of gravity.

[0078] Optionally, the number of the feeding ports 111 can be one or more. Multiple feeding ports 111 can feed different types of materials. The shape of the feeding port 111 can be circular, square, etc., and the embodiments of the present application do not make any limitations in this regard.

[0079] Exemplarily, the feeding port 111 can include a powder feeding port and a glue liquid feeding port. The powder feeding port can feed graphite powder, and the glue liquid feeding port can feed viscose and a solvent, such as water or N-methylpyrrolidone (NMP).

[0080] It can be understood that the rotor 300 is used to rotate the kneaded material and can have a spiral surface.

[0081] Optionally, the rotor 300 may be provided with a plurality of them, and the spiral surfaces between the plurality of rotors 300 are staggered from each other to avoid collision 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.

[0082] The rotor 300 rotates around the rotation axis driven by a power device, and the rotation speed can be set according to specific conditions such as the slurry to be kneaded, etc.; the rotor 300 can be a rotor 300 for a shear-type internal mixer. Exemplarily, the rotor 300 can be a two-edge shear type, a four-edge shear type, or a six-edge shear type.

[0083] Exemplarily, the kneading cavity 200 is disposed within the box body 100, and a cavity for kneading work is defined by the inner wall, and the inner wall can be fixed to the box body 100.

[0084] It can be understood that the kneading cavity 200 does not interfere with or limit the rotation of the rotor 300.

[0085] Exemplarily, the kneading cavity 200 includes a cavity main body 210 and at least a pair of feed hopper covers 220. The feed hopper covers 220 are respectively rotatably connected to the cavity main body 210, and the feed hopper covers 220 can rotate between a first position and a second position.

[0086] It can be understood that the number of pairs of the feed hopper covers 220 can be designed according to actual situations such as the size of the box body 100, the length of the rotor 300, etc.

[0087] Optionally, the kneading cavity 200 includes multiple pairs of feed hopper covers 220, and the multiple pairs of feed hopper covers 220 can be arranged along a first direction (X).

[0088] Optionally, the feed hopper cover 220 can be rotatably connected to the cavity main body 210 through a rotating shaft, a pin shaft, a hinge, etc. It can be understood that when the feed hopper cover 220 is in the second position, the rotating connection part can be sealed to prevent material leakage.

[0089] Exemplarily, the kneading cavity 200 has a pair of feed hopper covers 220, as Figure 1 、 Figure 2 shown, in the first position, the feed hopper cover 220 is opened relative to the cavity main body 210, and a feeding channel is formed between the pair of feed hopper covers 220, and the feeding channel communicates the feeding port 111 with the internal space. As Figure 3 、 Figure 4 shown, in the second position, the feed hopper cover 220 covers the cavity main body 210. The dotted lines in the figure are the edges of the feed hopper cover 220.

[0090] It can be understood that the first position is not fixed and is related to the number, position, and dimension along the second direction (Y) of the feeding openings 111. When the feed hopper cover 220 is in the first position, when observed along the gravity direction (Z), the feeding openings 111 are located between each pair of feed hopper covers 220, so that after the material enters the feeding openings 111, it falls into the kneading cavity 200 through the feeding channels for subsequent kneading processing.

[0091] It can be understood that if the material is directly fed into the feeding openings 111, after the graphite powder is fed, dust will be generated and adhere to the inner wall of the box body 100. The solvent volatilizes and wets the powder to strengthen the adhesion, so that a large amount of material adheres to the inner wall of the box body 100 and is difficult to be cleaned during kneading. In the embodiment of the present application, the feeding channels formed by the feed hopper covers 220 can guide the material to fall, and the generated dust will only adhere to the inner surface of the feed hopper covers 220; when the feed hopper covers 220 are rotated to the second position and the kneader 1000 starts kneading, the material adhering to the inner surface of the feed hopper covers 220 is driven by the rotor 300 to participate in kneading, realizing 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 keep the kneading cavity 200 in a closed state during the feeding and kneading processes, and each part of the kneading cavity 200 will not leave the box body 100 to contact the external environment, realizing the isolation between the internal environment of the equipment and the external environment.

[0092] It can be understood that in the second position, each pair of feed hopper covers 220 covers the cavity main body 210. The feed hopper covers 220 can cover the cavity main body 210 by means of partial stacking to realize the sealing of the kneading cavity 200.

[0093] Since the feed hopper covers 220 can rotate between the first position and the second position, when feeding the kneading cavity 200, each pair of feed hopper covers 220 is rotated 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 reducing powder dust, making it easier for the powder to concentrate and enter the kneading cavity 200; each pair of feed hopper covers 220 is rotated 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 hopper covers 220 to participate in kneading, realizing self-cleaning of the kneading cavity 200 while improving the mixing efficiency and mixing quality, and further improving the quality of the slurry product.

[0094] In an embodiment of the present application, the box body 100 includes a top wall 110. The top wall 110 is disposed on one side of the box body 100 in the opposite direction of the gravity direction (Z). A feeding port 111 is formed in the top wall 110. On both sides along the second direction (Y), each feeding 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). The second end 222 is rotatably connected to the cavity body 210. In the first position, the first end 221 of each pair of feeding bin covers 220 contacts the top wall 110. In the second position, at least a part of the first end 221 of each pair of feeding bin covers 220 overlaps along the gravity direction (Z).

[0095] Optionally, the top wall 110 may be fixed to other parts of the box body 100, such as the side wall 120, etc., or may be rotatably connected to the side wall 120. The embodiments of the present application do not limit this.

[0096] Optionally, the first end 221 and the second end 222 may be of a split structure or an integrally formed structure. The embodiments of the present application do not limit this.

[0097] It can be understood that in the first position, the first end 221 of each pair of feeding bin covers 220 contacts the top wall 110, so that the material will not adhere to the inner walls on both sides of the box body 100 along the second direction (Y).

[0098] Optionally, the box body 100 is generally made of a metal material. As a moving part, the feeding bin cover 220 will generate friction during the opening and closing process. A non-metal material, such as a polyester material or a composite material, can be selected. The embodiments of the present application do not limit this.

[0099] Exemplarily, as Figure 3 、 4 shown, in the first position, the first end 221 of the feeding 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 dotted line in the figure represents the edge of the feeding bin cover 220.

[0100] Thus, each pair of feeding bin covers 220 is rotated to the first position to contact the top wall 110, further reducing the risk of poor cleaning due to dust adhesion to the wall surface. When rotated to the second position, the overlapping can improve the sealing effect of the kneading cavity 200 and further improve the mixing efficiency.

[0101] In an embodiment of the present application, as Figure 4 shown, when observed along the first direction (X), the inner wall of the cavity body 210 and the feeding bin cover 220 are both curved wall surfaces. The rotor 300 has at least one convex rib 301, and the minimum distance between the convex rib 301 and the curved wall surface is in the range of 2 to 7 mm.

[0102] Exemplarily, the rotor 300 may have one rib 301 or multiple ribs 301, such as two ribs 301, four ribs 301, six ribs 301, etc.

[0103] Again exemplarily, the rib 301 may be in the shape of a blade, and the rotor 300 may be a simple stirring paddle or a cutting stirring paddle.

[0104] Optionally, the minimum distance between the rib 301 and the curved wall surface may be values such as 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 here.

[0105] It can be understood that the shape of the curved wall surface can cooperate with the rotation trajectory of the rib 301. After the feeding hopper cover 220 is closed on the cavity body 210, a sealed kneading cavity 200 is formed. The rotor 300 rotates in the kneading cavity 200, and the high-shear field generated between the rotor 300 and the curved wall surface during the kneading process will carry away the materials adhering to the surface of the curved wall surface. That is, during the kneading process, the rotor 300 can not only make the materials on the inner wall of the cavity body 210 participate in the kneading, but also drive the materials adhering to the inner surface of the feeding hopper cover 220. These materials are adhered to the inner surface of the feeding hopper cover 220 when the materials fall or dust during feeding. Thus, the kneader 1000 realizes self-cleaning during the working process, omitting the separate cleaning step. In addition, the materials will more intensively bear the high-shear dispersion action generated by the rotor 300 and the wall surface, improving the overall dispersion and mixing effect of the equipment, reducing the time for single-time mixing and kneading of the materials, and improving the production efficiency.

[0106] Since the distance between the rotor 300 and the curved wall surface is within a suitable range, the shear dispersion effect generated by the rotor 300 and the curved wall surface can be further improved, the mixing and dispersion degree of the materials can be increased, the time for single-time mixing and kneading of the materials can be reduced, and the production efficiency can be improved.

[0107] In the embodiment of the present application, the radian of the second end portion 222 is in the range of π / 6 - π / 3.

[0108] It can be understood that the radian of the second end portion 222 can be designed according to the dimensions of the box body 100, the kneading cavity 200, etc.

[0109] It can be understood that the radian of the curved wall surface of the second end portion 222 is in the range of π / 6 - π / 3.

[0110] Thus, the second end portion 222 has a suitable radian, making the driving torque and the rotation efficiency appropriate, while also taking into account the sealing effect at the first position and the second position, and reducing the mutual interference between each pair of feeding hopper covers 220.

[0111] In an embodiment of the present application, along the first direction (X), the box body 100 includes two side walls 120, and both ends of the feeding bin cover 220 along the first direction (X) are in contact with the respective side walls 120.

[0112] Exemplarily, as Figure 6 、 Figure 7 shown, the kneading cavity 200 has a pair of feeding bin covers 220, and both ends of the feeding bin covers 220 along the first direction (X) are respectively in contact with the two side walls 120.

[0113] It can be understood that at the first position, a feeding channel is formed between each pair of feeding bin covers 220 and the side walls 120. Materials may adhere to the inner surface of the side walls 120. During the rotation of the feeding bin covers 220 to the second position, the materials adhered to the inner surface of the side walls 120 can be scraped off and dropped into the kneading cavity 200.

[0114] Since the side walls 120 are the box walls of the box body 100 in the first direction (X), when the feeding bin covers 220 are rotated to the second position, the materials adhered to the side walls 120 can be scraped off and brought to the kneading cavity 200 to participate in kneading, further improving the self-cleaning ability of the kneader 1000.

[0115] In an embodiment of the present application, at the second position, the first end 221 protrudes along the gravity direction (Z).

[0116] Optionally, a protrusion is formed on one side of the first end 221 along the gravity direction (Z) close to the rotor 300, so that at the second position, the first end 221 protrudes along the gravity direction (Z) and the lower surface is closer to the rotor 300.

[0117] Alternatively, both sides of the first end 221 along the gravity direction (Z) are bent towards the side where the rotor 300 is located along the gravity direction (Z), so that at the second position, the first end 221 protrudes along the gravity direction (Z) and the lower surface is closer to the rotor 300.

[0118] Exemplarily, as Figure 4 、 Figure 5 shown, at the second position, both sides of the first end 221 along the gravity direction (Z) are bent towards the side where the rotor 300 is located along the gravity direction (Z).

[0119] Exemplarily, the first ends 221 of each pair of feeding bin covers 220 all protrude along the gravity direction (Z) and overlap each other at the second position.

[0120] Exemplarily, as Figure 4As shown, both sides of the first end portion 221 along the gravity direction (Z) are bent toward the side where the rotor 300 is located along the gravity direction (Z). Moreover, the shape of the first end portion 221 is arc-shaped and tangent to the shape of the second end portion 222, reducing the risk of the charging bin cover 220 breaking due to stress concentration.

[0121] Since the first end portion 221 protrudes along the gravity direction (Z), the charging bin cover 220 in the second position can be made to penetrate deeper into the kneading cavity 200, reducing the blind volume of the rotation of the rotor 300 in the kneading cavity 200, increasing the proportion of the action field covered by the rotor 300, making it easier for the material to be driven by the rotor 300, and further improving the kneading effect.

[0122] 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.

[0123] Exemplarily, as Figure 2 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 Figure 4 shown, the shapes of the two first end portions 221 cooperate, and after being superimposed, they enclose the kneading cavity 200, and the superimposed thickness is equal to the thickness H2 of the second end portion 222, avoiding material leakage or backflow during the kneading process.

[0124] 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 charging bin covers 220 to be superimposed in the second position.

[0125] 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). On both sides along the second direction (Y), the rotation axes of the first rotor 310 and the second rotor 320 are parallel.

[0126] Exemplarily, as Figure 2 、 Figure 4 shown, two rotors 300 are disposed in the kneading cavity 200.

[0127] It can be understood that the first rotor 310 and the second rotor 320 can rotate in opposite directions at different speeds, and their shear fields are superimposed on each other, achieving efficient kneading through actions such as shearing, folding, and extrusion.

[0128] Optionally, the convex ridges 301 of the first rotor 310 and the second rotor 320 can be meshed with each other. The embodiment of the present application does not limit this.

[0129] Since two rotors 300 are disposed in the kneading cavity 200, the two rotors 300 disperse and knead the material through rotation, reducing the kneading blind area and improving the kneading effect.

[0130] 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.

[0131] 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 .

[0132] Illustratively, the discharge screw 420 may extend along a first direction (X).

[0133] Exemplarily, the discharge screw 420 may be a screw in a single screw pump.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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 .

[0138] Optionally, the discharge bin cover 440 can be moved to the third position by rotating or sliding.

[0139] It can be understood that during the feeding and kneading processes, 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 reversely pushes the material into the cavity, there will still be some material residues at the bottom discharge bin, which are not fully stirred and dispersed, resulting in unqualified kneading and dispersion degrees of some materials. Moreover, during operation, the upper rotor 300 will apply pressure downward on the discharge screw 420. Long-term operation will cause the discharge screw 420 to deform, and finally a phenomenon of scraping the wall surface will occur. Therefore, after setting the discharge bin cover 440, it can prevent powder from falling into the discharge bin 410, causing the discharge screw 420 to be pressured and deformed, improve the quality of the kneaded material, and extend the service life of the discharge screw 420 and the bearing.

[0140] Optionally, during the discharging process, the discharge bin cover 440 may not be in the third position, so that the kneading cavity 200 and the discharge cavity 411 are communicated to facilitate discharging.

[0141] Optionally, the discharge bin cover 440 can be made of non-metallic material to avoid generating friction with the discharge screw 420 and mixing metal particles into the kneaded material.

[0142] Since the discharge bin cover 440 can separate the kneading cavity 200 and the discharge cavity 411, the discharge bin cover 440 is in the third position during the feeding and kneading processes, closing the discharge cavity 411, preventing powder from falling into the discharge cavity 411 and causing the discharge screw 420 to be pressured and deformed, further improving the product quality, and extending the service life of the discharge screw 420.

[0143] In the embodiment of the present application, the discharge bin cover 440 is configured to rotate around the first direction (X) to the third position and is slidably connected to the outer wall of the discharge bin 410.

[0144] It can be understood that the discharge bin 410 has an opening on the side facing the kneading cavity 200. When the discharge bin cover 440 is in the third position, it closes the opening and separates the kneading cavity 200 and the discharge cavity 411.

[0145] Exemplarily, as Figure 8 shown, the discharge bin cover 440 can be driven by the cooperation of a gear and a rack, and driven by a motor (not shown in the figure) to achieve precise control of the position.

[0146] Another exemplarily, a guiding surface can be provided on the outer wall of the discharge bin 410, and the discharge bin cover 440 can be set as an arc shape and is slidably connected to the outer wall of the discharge bin 410. The guiding surface can be a slide rail, a groove, etc.

[0147] Optionally, monitoring sensors, monitoring switches, etc. can also be set for the position of the discharge bin cover 440 for limiting. The embodiment of the present application does not make any limitation on this.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] Optionally, a shaft sleeve may be provided on the support frame 460 to connect the discharge flange 450 .

[0153] 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.

[0154] 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.

[0155] 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 .

[0156] 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.

[0157] Exemplarily, cemented carbide includes, but is not limited to, tungsten carbide and titanium nitride.

[0158] 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.

[0159] 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.

[0160] In the embodiment of the present application, each feed bin cover 220 is drivingly connected to at least one gas-liquid booster cylinder 500 .

[0161] 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).

[0162] 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.

[0163] 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.

[0164] 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.

[0165] The kneading method comprises the following steps:

[0166] Feeding step: Each pair of feed bin covers 220 rotates to the first position to form a feeding channel, and feeds materials into the feeding port 111.

[0167] Kneading step: Each pair of feed bin covers 220 rotates to the second position, and the rotor 300 rotates to knead the materials.

[0168] In a specific embodiment, during feeding, first, the pneumatic-liquid intensifying cylinder 500 drives each pair of feed bin covers 220 to rotate to the first position to form a feeding channel, the discharge bin cover 440 rotates to the third position, and then feeds materials into the feeding port 111. After feeding is completed, each pair of feed bin covers 220 rotates to the second position to close the kneading cavity 200, and the twin rotors 300 rotate at different speeds in opposite directions to knead the materials.

[0169] In a specific embodiment, the kneading method further includes a discharging step: The discharge bin cover 440 leaves the third position, the discharge cavity 411 communicates with the kneading cavity 200, the discharge screw 420 and the rotor 300 rotate to push and convey the kneaded materials outwards, and the kneaded materials are extruded into columnar materials through the discharge flange 450, and the cutting mechanism 470 divides the columnar materials.

[0170] Thus, the kneading method provided in the second aspect of the embodiment of the present application can reduce the bad situation of powder consolidation and residue on the inner wall of the kneader 1000 during feeding, and can improve the mixing efficiency and product quality of the kneader 1000 while realizing self-cleaning of the kneading cavity 200.

[0171] The following describes the specific scheme of the embodiment of the present application with reference to the drawings.

[0172] During the lithium battery coating process, the mixing production of the slurry is a key link. The quality of the slurry mixing production directly affects the quality of the coating process. The inner cavity of the traditional kneader has been widely used in aspects such as mixing colloids and kneading powders, but the difficult cleaning of large kneaders has always been one of the problems that have long troubled the production quality. During the feeding process, dust will be generated when powders are fed into the kneader, and the dust fills the bin, exceeding the kneading range of the rotor, resulting in the accumulation and adhesion of dry powder residues on the inner wall of the bin. If the powders adhered to the wall fall off and drop into the newly made slurry, it will affect the yield of the manufacturing process and further affect the battery performance.

[0173] This embodiment proposes a kneader 1000 with excellent mixing effect and capable of realizing self-cleaning of the bin.

[0174] The kneader 1000 includes a box body 100, a kneading cavity 200 and a rotor 300. The kneading cavity 200 is arranged inside 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 main body 210 and at least a pair of feeding bin covers 220. The feeding bin covers 220 are respectively rotatably connected to the cavity main body 210, 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 opened relative to the cavity main body 210, and a feeding channel is formed between each pair of feeding bin covers 220. The feeding channel communicates the feeding port 111 with the internal space; in the second position, each pair of feeding bin covers 220 is configured to cover the cavity main body 210.

[0175] The kneader 1000 is driven by a pneumatic-hydraulic intensifying cylinder 500. Rotating the feeding bin cover 220 realizes the actions of opening the bin for feeding and closing the bin for kneading. During the process of opening the bin for feeding, the pneumatic-hydraulic intensifying cylinder 500 contracts, driving the feeding bin cover 220 to rotate and open the bin. The feeding bin cover 220 is fitted with the upper top cover to form a closed feeding channel, preventing the powder from falling into the gap of the side bin chamber. When the pneumatic-hydraulic intensifying cylinder 500 extends, the feeding bin cover 220 closes, forming the kneading cavity 200 with the cavity main body 210. The high-shear field generated by the rotor 300 and the wall surface during the kneading process will carry away the materials sticking to the wall surface to realize the self-cleaning function. The design of this bin chamber structure can not only realize self-cleaning during operation but also improve the mixing efficiency. In Figure 4 In the kneading cavity 200 in, the materials will more intensively bear the high-shear dispersion action generated by the rotor 300 and the wall surface, improving the overall dispersion and mixing effect of the equipment, reducing the time of kneading the materials for a single time, and improving the production efficiency.

[0176] During the kneading process, the feeding bin covers 220 are overlapped to close the kneading cavity 200. The cavity interacts with the rotor 300. The rotor 300 drives the residual materials sticking to the wall surface of the formed slurry, and finally agglomerates into lump-shaped materials and discharges from the kneading cavity 200 to realize the self-cleaning function. And when the materials are in the kneading cavity 200, the probability of high-shear with the wall surface under the action of the rotor 300 is twice that of the traditional cavity. The formed strong shear field will make the mixing and dispersion degree of the powder and the slurry higher, improving the production efficiency of the kneading process.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0183] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form new technical solutions.

[0184] Unless otherwise specified, all steps of this application can be carried out 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) carried out sequentially, or may include steps (b) and (a) carried out sequentially. For example, it is mentioned that the method may further 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.

[0185] The above embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope claimed in this application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. This application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claimed protection.

Claims

1. A kneader, 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 direction of gravity.

3. The kneading machine according to claim 2, wherein 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 kneader 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 kneader 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 kneader 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 kneader according to claim 9, characterized in that, The discharging mechanism further includes a discharging flange, a support frame, and a cutting mechanism. The discharging port is provided with a discharging flange, and the discharging flange is communicated with the discharging port through the support frame. The cutting mechanism is arranged on the discharging side of the discharging flange and is used for cutting the kneaded material.

13. The kneading machine according to claim 9, characterized in that, Hard alloy coatings are provided on the inner wall of the cavity body, the surface of the rotor, and the surface of the discharging screw.

14. The kneading machine according to any one of claims 1 to 8, characterized in that, Each of the charging hopper covers is drivingly connected to at least one air-liquid intensifying cylinder.

15. A kneading method, characterized in that, The kneading method is applied to a kneader, and the kneader includes a box body, a kneading cavity, and a rotor. The kneading cavity is arranged inside 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 includes a cavity body and at least a pair of charging hopper covers. The charging hopper covers are respectively rotatably connected to the cavity body, and the charging hopper covers can rotate between a first position and a second position. In the first position, each pair of the charging hopper covers is opened relative to the cavity body, and a feeding channel is formed between each pair of the charging hopper covers. The feeding channel communicates the feeding port with the internal space. In the second position, each pair of the charging hopper covers is configured to cover the cavity body. The kneading method includes the following steps: Each pair of the charging hopper covers rotates to the first position to form the feeding channel, and materials are fed into the feeding port. Each pair of the charging hopper covers rotates to the second position, and the rotor rotates to knead the materials.

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