Mixing device and internal mixer

Abstract

This utility model relates to the field of rubber processing technology, specifically a mixing device and an internal mixer. This device addresses the problems of complex tilting operation, poor stability, and safety hazards associated with traditional internal mixers. The mixing device includes a mounting frame, a mixing chamber, a rotating assembly, and an adjusting assembly. The mixing chamber is rotatably mounted via a support plate and tilted by a motor; the mixing roller gears of the rotating assembly automatically disengage during tilting to prevent accidental activation; the adjusting assembly includes a limiting frame and a rack-and-pinion self-locking mechanism to maintain the tilted state after tilting. The pressing seat is pushed by a cylinder and cooperates with the limiting block of the mixing chamber to seal the chamber, with a built-in heating plate to regulate temperature. During reset, the limiting frame supports the mixing chamber in a horizontal position. This device simplifies the tilting operation, improves stability, eliminates safety hazards, and is used in rubber mixing processing to improve efficiency and safety.

Description

Technical Field

[0001] This utility model relates to the field of rubber processing technology, and in particular to a mixing device and a mixer. Background Technology

[0002] In the processing of polymer materials such as rubber and plastics, internal mixers are indispensable key equipment. Their main function is to mix raw materials to ensure that various additives and matrix materials are fully and evenly mixed in order to meet the requirements of subsequent processing and product performance.

[0003] The tilting mechanism of the mixing box in traditional internal mixers is poorly designed, making operation complex and labor-intensive. Operators need to manually operate multiple parts to tilt the mixing box, which not only increases labor intensity but also prolongs operation time and reduces production efficiency. During the tilting process, the stability of the mixing box is difficult to guarantee. Due to the lack of effective limiting and support devices, the mixing box is prone to shaking or excessive tilting angles, making material removal neither quick nor convenient. At the same time, if there is an operational error in the drive component during tilting, the mixing roller may restart rotation, which can easily pose a safety hazard during material removal.

[0004] To address the aforementioned problems, this utility model document proposes a mixing device and an internal mixer. Utility Model Content

[0005] The purpose of this utility model is to solve the shortcomings of the existing technology, such as poor design of the tilting mechanism of the traditional internal mixer, complicated and laborious operation, low stability, and safety hazards during tilting and material handling. Therefore, a mixing device and internal mixer are proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mixing apparatus, comprising:

[0008] The mounting frame has a base plate fixedly installed inside it. The base plate is located near the bottom of the mounting frame. Two support plates are fixedly installed on the top of the base plate. The same mixing box is rotatably installed between the two support plates.

[0009] A fixed compartment, which is fixedly installed inside the mounting frame and located above the mixing box;

[0010] A rotating assembly, comprising two mixing rollers rotatably disposed inside a mixing chamber, the two mixing rollers cooperating with each other to extrude and mix the raw materials;

[0011] An adjustment assembly includes a first motor fixedly installed on one side of one of the support plates. One end of the output shaft of the first motor is rotatably connected to one side of the mixing box to drive the mixing box to tilt. A support frame is fixedly installed on the top of the base plate. A limit frame is rotatably installed on one side of the support frame through a connecting frame. The limit frame cooperates with the bottom of the mixing box to achieve support and limit of the horizontally placed mixing box.

[0012] When the mixing box rotates and tilts, the limiting frame rotates by moving the lever fixed to one side to disengage from the bottom of the mixing box. The first motor drives the mixing box to rotate around the axis of the support plate. After tilting, the mixing box returns to its original position, and the limiting frame rotates and moves out to support the mixing box to be placed horizontally.

[0013] In one possible design, the rotating assembly further includes two first gears, which are respectively fixedly mounted on one end of the two mixing rollers and mesh with each other; a connecting shell is fixedly mounted on one side of the mixing box, and both first gears are located inside the connecting shell; a second motor is fixedly mounted on one side of the adjacent support plate, and a second gear is fixedly mounted on one end of the output shaft of the second motor, which meshes with one of the first gears to drive the mixing roller to rotate; when the mixing box is tilted, the first gear disengages from the second gear to prevent accidental rotation of the mixing roller.

[0014] In one possible design, the adjusting assembly further includes a rack, which is fixedly mounted on the side of the support frame away from the limiting frame via a bracket; two sliding sleeves are slidably fitted on the outer wall of the rack, and connecting rods are rotatably mounted on the top of each of the two sliding sleeves, with the ends of the two connecting rods close to each other hinged; a fixing rod is fixedly mounted on one side of the hinge axis of the two connecting rods, and a connecting plate is fitted on the outer wall of the fixing rod, with a limiting post fixedly passing through the connecting plate near its top; a fixing frame is fixedly mounted on one side of the mixing box, and sliding grooves are opened on both sides of the fixing frame, with the connecting plate located inside the fixing frame, and both ends of the limiting post slidably connected to the inner wall of the adjacent sliding groove; when the mixing box rotates and tilts, the sliding groove drives the limiting post to lift the connecting plate, causing the hinge point of the fixed rod to rise, thereby driving the two sliding sleeves to move towards each other along the rack.

[0015] In one possible design, the rack has multiple locking teeth on one side, divided into two groups, with the locking teeth on both sides being symmetrical. One side of each locking tooth has an inclined surface, and the other side has a flat surface, with the inclined surfaces of the two groups of teeth facing the corresponding ends of the rack. Each of the two sliding sleeves has a locking post that slides through one side, and each locking post engages with a corresponding locking tooth. A spring is fitted onto the outer wall of each locking post, with one end of the spring fixedly connected to one side of the corresponding sliding sleeve and the other end fixedly connected to the outer wall of the corresponding locking post. When the sliding sleeves move towards each other, the locking post slides along the inclined surface of the locking tooth. When tilted to the correct position, the locking post contacts the plane of the locking tooth to form a self-locking mechanism, maintaining the tilted state of the mixing box.

[0016] In one possible design, a connecting compartment is fixedly installed on the top of the mixing box, and the connecting compartment is sealed to the bottom of the fixed compartment. Both the connecting compartment and the fixed compartment have inclined surfaces on their adjacent sides. When the mixing box is rotated and tilted, the inclined surfaces of the connecting compartment separate from the fixed compartment to facilitate material discharge.

[0017] In one possible design, two cylinders are fixedly inserted through the top of the fixed chamber. One end of the piston rod of each cylinder is fixedly mounted with the same pressing seat. The pressing seat is in a sealing sliding fit with the inner walls of the mixing chamber, connecting chamber, and fixed chamber. Limiting grooves are formed on both sides of the pressing seat, and limiting blocks are fixedly installed on both sides of the inner walls of the mixing chamber. The inner walls of the limiting grooves slide in fit with the corresponding limiting blocks. The cylinders push the pressing seat downwards, causing the limiting blocks to engage with the limiting grooves, ensuring that the pressing seat seals the top of the mixing chamber and prevents raw materials from splashing.

[0018] In one possible design, a heating plate is fixedly embedded inside the pressing seat, which is used to heat the inside of the mixing chamber to regulate the raw material processing temperature.

[0019] In one possible design, a feed hopper is fixedly installed on one side of the mounting frame, and a feed pipe is fixedly connected to the bottom of the feed hopper. One end of the feed pipe is fixedly connected to the feed inlet on one side of the fixed chamber.

[0020] A mixing machine, comprising: the mixing apparatus described in any one of the preceding claims.

[0021] In this application, during use, the raw material is placed in the feed hopper, and then falls into the mixing chamber through the feed pipe and the feed inlet of the fixed compartment. The second motor is activated to drive the second gear, which in turn drives the first gear meshing with it to rotate, causing the two mixing rollers to rotate in opposite directions inside the mixing chamber. The cooperating mixing rollers repeatedly squeeze and shear the raw material, achieving continuous mixing. Simultaneously, a cylinder pushes the pressing seat downwards until the limiting blocks on both sides of the mixing chamber's inner wall engage with the limiting grooves on both sides of the pressing seat, ensuring the pressing seat is in place. At this point, the pressing seat seals and restricts the raw material inside the mixing chamber, ensuring that the raw material can be fully processed within the enclosed space of the mixing chamber. The heating plate embedded in the pressing seat is then activated, and the temperature required for raw material processing is also regulated.

[0022] After processing, pull the limit frame to rotate it until it is in close contact with the support frame. Then, start the first motor to drive the mixing box to rotate around the axis of the support plate. During this process, the first gear disengages from the second gear, ensuring that the two mixing rollers will not continue to rotate due to operational errors when the operator removes the processed raw materials, thus improving the safety of equipment operation.

[0023] When the mixing box is tilted, the fixing frame rises along one side of the mixing box. At this time, the slide groove drives the limiting post to lift the connecting plate, which allows the hinge point of the two connecting rods to rise. During this process, the connecting rod drives the two sliding sleeves to move closer along the rack. The locking post, under the action of the spring, engages with the rack in a new locking position. At the same time, with the setting of multiple locking tooth inclined surfaces, the locking post and multiple locking teeth do not restrict each other in this direction. When rotated to a certain angle, because the center of gravity of the mixing box is low, it will continue to maintain the tendency to return to its original position. In this direction, the locking post and the locking tooth plane form a limiting self-locking, thereby maintaining the tilted state of the mixing box.

[0024] During the rotation of the mixing chamber, the inclined surface of the top connecting chamber separates from the fixed chamber, after which the processed material can be taken out.

[0025] When reset is required, manually pull the locking pin, and the mixing box will rotate under the drive of the first motor. Then, the limiting bracket can be rotated again to move it under the mixing box, thereby supporting and limiting the mixing box and ensuring that the mixing box can be placed stably and horizontally.

[0026] Throughout the process, the inclined design of the fixed chamber and the connecting chamber ensures mutual clearance and sealing during rotation, and the pressing seat can always maintain a closed state on the raw materials to ensure sufficient mixing.

[0027] Beneficial effects: In this utility model, the mixing device and internal mixer are driven by a motor to rotate and tilt the mixing box around the support shaft. With the inclined separation design of the connecting bin and the fixed bin, the processed material can be discharged smoothly, reducing the intensity of manual cleaning. During the tilting process, the driving gear of the mixing roller automatically disengages, avoiding the roller body from rotating due to misoperation and improving safety.

[0028] In this utility model, the mixing device and internal mixer are driven by a cylinder to move the pressing seat downward. Its limiting groove slides and engages with the limiting block on the inner wall of the mixing chamber, ensuring that the pressing seat is accurately positioned and the top of the chamber is sealed. This design allows the raw materials to be squeezed and sheared by the mixing rollers in the closed space, effectively preventing raw material splashing or leakage and improving the mixing uniformity.

[0029] In this utility model, when the mixing device and internal mixer are tilted, the sliding groove and the limiting column drive the linkage mechanism to make the two sliding sleeves move towards each other along the rack; the locking column is inserted into the inclined part of the rack teeth under the action of the spring and slides freely; when tilted to the position, the locking column contacts the plane of the locking teeth to form a self-locking mechanism, which counteracts the restoring force generated by the weight of the mixing box and reliably maintains the tilt angle for easy unloading.

[0030] In this utility model, when the mixing device and internal mixer are horizontally reset, the locking pin is manually released and the internal mixer is driven to rotate by the motor, and the limit frame is rotated to the bottom of the internal mixer for support. This mechanical limiting method ensures that the internal mixer effectively maintains a horizontal working position, avoids shaking, and provides a stable foundation for continuous feeding and processing.

[0031] In this utility model, the mixing device and internal mixer have a built-in heating plate in the pressing seat, which directly heats the raw materials in the closed chamber, resulting in more uniform and direct temperature transfer, meeting the process temperature requirements of different raw materials, and improving the mixing efficiency and quality consistency.

[0032] In this invention, the device achieves convenient unloading by driving the mixing box to rotate and tilt via a motor. After tilting, the drive gear can disengage synchronously, improving operational safety. The cylinder pushes the pressing seat and engages with the box body to enhance sealing and ensure that the raw materials are fully processed. During the tilting process, the linkage rack and pinion locking mechanism forms a self-locking mechanism, which can maintain a stable tilting state. After resetting, the limiting frame can stably support the mixing box, ensuring stable processing efficiency and quality. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of a mixing device and an internal mixer proposed in this utility model;

[0034] Figure 2 This is a cross-sectional structural schematic diagram of a mixing device and an internal mixer proposed in this utility model;

[0035] Figure 3 This is a schematic diagram of the mounting frame structure of a mixing device and an internal mixer proposed in this utility model;

[0036] Figure 4 This is a schematic diagram of the pressing seat structure of a mixing device and an internal mixer proposed in this utility model;

[0037] Figure 5 This is a schematic diagram of the disassembled mixing box structure of a mixing device and internal mixer proposed in this utility model.

[0038] Figure 6 This is a schematic diagram of the first and second gears of a mixing device and internal mixer proposed in this utility model.

[0039] Figure 7 This is a schematic diagram of the support frame structure of a mixing device and an internal mixer proposed in this utility model;

[0040] Figure 8 This is a schematic diagram of the connecting rod assembly structure of a mixing device and an internal mixer proposed in this utility model;

[0041] Figure 9 This is a cross-sectional view of the sliding sleeve of a mixing device and internal mixer proposed in this utility model.

[0042] In the diagram: 1. Mounting frame; 2. Base plate; 3. Mixing box; 4. Connecting chamber; 5. Fixed chamber; 6. Feed hopper; 7. Feed pipe; 8. Cylinder; 9. Pressing seat; 10. Support plate; 11. First motor; 12. Support frame; 13. Heating plate; 14. Limiting groove; 15. Limiting block; 16. Mixing roller; 17. First gear; 18. Connecting shell; 19. Fixed frame; 20. Slide groove; 21. Second motor; 22. Second gear; 23. Connecting frame; 24. Limiting frame; 25. Pulley; 26. Rack; 27. Sliding sleeve; 28. Connecting rod; 29. ​​Fixed rod; 30. Connecting plate; 31. Limiting post; 32. Locking post; 33. Spring. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0044] In one embodiment: Refer to Figure 1-9 A mixing apparatus includes: a mounting frame 1, a mixing box 3, a rotating assembly, an adjusting assembly, and related auxiliary components.

[0045] In this embodiment, the mounting frame 1 serves as an integral support structure, and a base plate 2 is fixedly installed inside it. The base plate 2 is located in the bottom area of ​​the mounting frame 1. Two support plates 10 are welded to the top of the base plate 2, and a mixing box 3 is rotatably arranged between the two support plates 10.

[0046] In this embodiment, the rotating assembly consists of two internal mixing rollers 16, which are rotatably mounted inside the mixing chamber 3 via bearings. Their ends extend to the outside of the mixing chamber 3 and are fixedly mounted with first gears 17. The two first gears 17 mesh with each other to achieve opposite rotation of the two internal mixing rollers 16. A connecting shell 18 is welded to the side wall of the mixing chamber 3, enclosing the two first gears 17. The connecting shell 18 is rotatably connected to an adjacent support plate 10 via a rotating shaft. A second motor 21 is fixedly mounted on the outside of the support plate 10 via a bracket. A second gear 22 mounted on its output shaft meshes with one of the first gears 17, forming a power transmission path.

[0047] In this embodiment, the adjustment assembly includes a tilting mechanism and a limiting mechanism for the mixing box 3. A first motor 11 is bolted to the outer side of one of the support plates 10, and its output shaft is rotatably connected to the side wall of the mixing box 3. A support frame 12 is welded onto the base plate 2, providing support for the mixing box 3. A limiting frame 24 is rotatably mounted on the support frame 12 via a connecting frame 23. The top of the limiting frame 24 slides against the bottom of the mixing box 3, and its bottom slides against the top of the base plate 2, assisting in supporting and limiting the mixing box 3. A lever 25 is also welded to one side of the limiting frame 24, allowing the user to manually rotate the limiting frame 24.

[0048] Furthermore, in this embodiment, a rack 26 is fixed to the side of the support frame 12 away from the limiting frame 24 via a bracket. Two sliding sleeves 27 (which can be cylindrical or square) are slidably fitted on the rack 26. A connecting rod 28 is hinged to the top of each sliding sleeve 27, and the adjacent ends of the two connecting rods 28 are hinged to each other. A fixing rod 29 is fixedly connected to one end of the hinge axis of the two connecting rods 28. A connecting plate 30 is fitted on the outer wall of the fixing rod 29, and a limiting post 31 is welded to the top of the connecting plate 30. A fixing frame 19 is welded to the side wall of the mixing box 3, and sliding grooves 20 are opened on both sides of the fixing frame 19. The connecting plate 30 is located inside the fixing frame 19, and the two ends of the limiting post 31 are embedded in the sliding grooves 20.

[0049] Furthermore, in this embodiment, symmetrically distributed locking teeth are machined on both sides of the rack 26. Multiple locking teeth in each group have an inclined surface on one side and a vertical plane on the other, with the inclined surfaces of the multiple locking teeth in the two groups being far apart from each other. A locking post 32 slides through the side wall of the sliding sleeve 27. A spring 33 is fitted onto the outer wall of the locking post 32. The two ends of the spring 33 are respectively connected to the spring seats of the sliding sleeve 27 and the locking post 32. The locking post 32 cooperates with the corresponding locking teeth to achieve unidirectional sliding limit of the sliding sleeve 27. That is, when the two sliding sleeves 27 are far apart, the corresponding locking post 32 can cooperate with the vertical plane of the corresponding locking tooth to complete the limit locking of the two sliding sleeves 27.

[0050] The end shape of the locking pin 32 can be a conical head, a flat head, or a hemispherical head to ensure smooth passage over the inclined surface of the locking teeth of the rack 26.

[0051] This application can be used in the field of rubber processing technology, or in other fields applicable to this application.

[0052] In another embodiment: Reference Figure 1 , 2 4. A mixing mill, which includes the above-mentioned mixing device, can be applied to the field of rubber processing technology;

[0053] In this embodiment, a connecting chamber 4 is fixedly connected to the top of the mixing box 3. The connecting chamber 4 and the bottom of the fixed chamber 5 form a sealed fit. Both contact surfaces are machined with bevels to ensure that the mixing box 3 can maintain a seal and avoid interference when rotating. The fixed chamber 5 is fixed to the mounting frame 1 with bolts. A feed port is opened on its side. The feed hopper 6 is connected to the feed port through the feed pipe 7 to form a raw material conveying channel.

[0054] In this embodiment, two cylinders 8 are bolted to the top of the fixed chamber 5, and their piston rods are connected to the pressing seat 9. A silicone sealing ring is installed on the outer wall of the pressing seat 9 to ensure a sealed sliding fit with the inner walls of the mixing box 3, the connecting chamber 4, and the fixed chamber 5. Limiting grooves 14 are provided on both sides of the pressing seat 9, which form a sliding guide limit with the limiting block 15 welded to the inner wall of the mixing box 3. A heating plate 13 is embedded inside the pressing seat 9, and the heating temperature can be adjusted by an external temperature controller. The heating plate 13 is the same as that in the patent with publication number CN223045230U.

[0055] The cross-section of the limiting groove 14 of the pressing seat 9 can be made into a rectangle, trapezoid, or wedge shape to cooperate with the limiting block 15.

[0056] However, as is well known to those skilled in the art, the working principles and wiring methods of cylinder 8, first motor 11 and second motor 21 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0057] The working principle and usage process of this technical solution are as follows: During use, the raw material is placed in the feed hopper 6, and then falls into the mixing chamber 3 through the feed pipe 7 and the feed inlet of the fixed chamber 5. The second motor 21 is started to drive the second gear 22, which in turn drives the first gear 17 meshing with it to rotate, causing the two mixing rollers 16 to rotate in opposite directions within the mixing chamber 3. The cooperating mixing rollers 16 repeatedly squeeze and shear the raw material, achieving continuous mixing. Simultaneously, the cylinder 8 pushes the pressing seat 9 downwards until the limiting blocks 15 on both sides of the mixing chamber 3 engage with the limiting grooves 14 on both sides of the pressing seat 9, ensuring that the pressing seat 9 is in place. At this point, the pressing seat 9 seals and restricts the raw material within the mixing chamber 3, ensuring that the raw material can be fully processed within the enclosed space of the mixing chamber 3. The heating plate 13 embedded in the pressing seat 9 is then activated, and the temperature required for raw material processing is also regulated.

[0058] After processing, pull the limit frame 24 to rotate it until it is in close contact with the support frame 12. Then, start the first motor 11 to drive the mixing box 3 to rotate around the axis of the support plate 10. During this process, the first gear 17 disengages from the second gear 22, which ensures that when the operator removes the processed raw materials, the two mixing rollers 16 will not continue to rotate due to operational errors, thus improving the safety of equipment operation.

[0059] When the mixing box 3 is tilted, the fixing frame 19 rises along one side of the mixing box 3. At this time, the slide 20 drives the limiting post 31 to lift the connecting plate 30, which allows the fixing rod 29 to pull the hinge point of the two connecting rods 28 to rise. During this process, the connecting rod 28 drives the two sliding sleeves 27 to move closer along the rack 26. The locking post 32 is locked into the new locking position of the rack 26 under the action of the spring 33. At the same time, in this direction, with the setting of multiple locking tooth inclined surfaces, the locking post 32 and multiple locking teeth will not be restricted. When rotated to a certain angle, because the center of gravity of the mixing box 3 is low, it will continue to maintain the tendency to return to its original position. In this direction, the locking post 32 and the locking tooth plane form a limiting self-locking, thereby maintaining the tilted state of the mixing box 3.

[0060] During the rotation of the mixing chamber 3, the inclined surface of the top connecting chamber 4 separates from the fixed chamber 5, after which the processed material can be taken out.

[0061] When a reset is required, manually pull the locking pin 32, and the mixing box 3 will rotate under the drive of the first motor 11. Then, the limiting frame 24 can be rotated again to move it below the mixing box 3, thereby supporting and limiting the mixing box 3 and ensuring that the mixing box 3 can be stably placed horizontally.

[0062] Throughout the process, the inclined design of the fixed chamber 5 and the connecting chamber 4 ensures mutual clearance and sealing during rotation, and the pressing seat 9 can always maintain a closed state on the raw materials to ensure sufficient mixing.

[0063] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0064] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mixing apparatus, comprising a mounting frame (1), wherein a base plate (2) is fixedly installed inside the mounting frame (1), the base plate (2) is located near the bottom of the mounting frame (1), and two support plates (10) are fixedly installed on the top of the base plate (2), and a mixing box (3) is rotatably installed between the two support plates (10); A fixed compartment (5), which is fixedly installed inside the mounting frame (1) and located above the mixing box (3), is characterized in that... Also includes: The rotating assembly includes two mixing rollers (16) rotatably disposed inside the mixing box (3), the two mixing rollers (16) cooperating with each other to extrude and mix the raw materials; The adjustment assembly includes a first motor (11) fixedly installed on one side of one of the support plates (10). One end of the output shaft of the first motor (11) is rotatably connected to one side of the mixing box (3) to drive the mixing box (3) to tilt. A support frame (12) is fixedly installed on the top of the base plate (2). A limit frame (24) is rotatably installed on one side of the support frame (12) through a connecting frame (23). The limit frame (24) cooperates with the bottom of the mixing box (3) to support and limit the horizontally placed mixing box (3).

2. The mixing apparatus according to claim 1, characterized in that, The rotating assembly also includes two first gears (17), which are fixedly installed at one end of the two mixing rollers (16) and mesh with each other. A connecting shell (18) is fixedly installed on one side of the mixing box (3), and the two first gears (17) are located inside the connecting shell (18). A second motor (21) is fixedly installed on one side of the adjacent support plate (10), and a second gear (22) is fixedly installed at one end of the output shaft of the second motor (21). The second gear (22) meshes with one of the first gears (17) to drive the mixing roller (16) to rotate. When the mixing box (3) is tilted, the first gear (17) disengages from the second gear (22) to avoid accidental operation that causes the mixing roller (16) to rotate.

3. The mixing apparatus according to claim 1, characterized in that, The adjustment assembly also includes a rack (26), which is fixedly mounted on the side of the support frame (12) away from the limit frame (24) by a bracket; two sliding sleeves (27) are slidably sleeved on the outer wall of the rack (26), and a connecting rod (28) is rotatably mounted on the top of each of the two sliding sleeves (27), and the two connecting rods (28) are hinged at their close ends; a fixing rod (29) is fixedly mounted on one side of the hinge axis of the two connecting rods (28), and a connecting plate (30) is sleeved on the outer wall of the fixing rod (29), and the connecting plate (30) is positioned near the top end. A fixed through-type limiting post (31) is fixedly installed on one side of the mixing box (3). A fixing frame (19) is fixedly installed on both sides of the fixing frame (19). A sliding groove (20) is opened on both sides of the fixing frame (19). The connecting plate (30) is located inside the fixing frame (19). Both ends of the limiting post (31) are slidably connected to the inner wall of the adjacent sliding groove (20). When the mixing box (3) rotates and tilts, the sliding groove (20) drives the limiting post (31) to lift the connecting plate (30), so that the hinge point of the fixed rod (29) pulls the connecting rod (28) to rise, thereby driving the two sliding sleeves (27) to move towards each other along the rack (26).

4. The mixing apparatus according to claim 3, characterized in that, The rack (26) has multiple locking teeth on one side, which are divided into two groups and are symmetrical to each other. One side of the multiple locking teeth has an inclined surface, and the other side has a flat surface. The inclined surfaces of the two groups of locking teeth face the corresponding ends of the rack (26). One side of each of the two sliding sleeves (27) has a locking post (32) that slides through it. Both locking posts (32) engage with the corresponding locking teeth. The outer wall of the locking post (32) is fitted with a spring (33). One end of the spring (33) is fixedly connected to one side of the corresponding sliding sleeve (27), and the other end is fixedly connected to the outer wall of the corresponding locking post (32). When the sliding sleeves (27) move towards each other, the locking post (32) slides along the inclined surface of the locking teeth. When tilted to the position, the locking post (32) contacts the plane of the locking teeth to form a self-locking mechanism, maintaining the tilted state of the mixing box (3).

5. The mixing apparatus according to claim 1, characterized in that, A connecting chamber (4) is fixedly installed on the top of the mixing box (3). The connecting chamber (4) is sealed to the bottom of the fixed chamber (5). The connecting chamber (4) and the fixed chamber (5) are both provided with inclined surfaces on the side that are close to each other. When the mixing box (3) is rotated and tilted, the inclined surface of the connecting chamber (4) separates from the fixed chamber (5) to facilitate the discharge of materials.

6. The mixing apparatus according to claim 1, characterized in that, Two cylinders (8) are fixedly inserted through the top of the fixed chamber (5). The piston rods of the two cylinders (8) are fixedly installed with the same pressing seat (9). The pressing seat (9) is in a sealed sliding fit with the inner wall of the mixing box (3), the connecting chamber (4), and the fixed chamber (5). Limiting grooves (14) are opened on both sides of the pressing seat (9). Limiting blocks (15) are fixedly installed on both sides of the inner wall of the mixing box (3). The inner wall of the limiting groove (14) is in a sliding fit with the corresponding limiting block (15). The cylinder (8) pushes the pressing seat (9) down, so that the limiting block (15) is inserted into the limiting groove (14), ensuring that the pressing seat (9) seals the top of the mixing box (3) and prevents raw materials from splashing.

7. The mixing apparatus according to claim 6, characterized in that, A heating plate (13) is fixedly embedded inside the pressing seat (9). The heating plate (13) is used to heat the inside of the mixing box (3) to adjust the raw material processing temperature.

8. The mixing apparatus according to claim 1, characterized in that, A feeding hopper (6) is fixedly installed on one side of the mounting frame (1), and a feeding pipe (7) is fixedly connected to the bottom of the feeding hopper (6). One end of the feeding pipe (7) is fixedly connected to the feeding port on one side of the fixed chamber (5).

9. A type of internal mixer, characterized in that, include: The mixing apparatus according to any one of claims 1-8.

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