Mixing mechanism for internal mixer

Abstract

The utility model relates to mixing equipment technical field for internal mixer, especially mixing mechanism for internal mixer, including with the mixing shell fixed connection of rack, the mixing shell has the mixing cavity that opens to upwards, is equipped with mixing roller one and mixing roller two in mixing cavity through the mode of rotation, and the mixing shell includes the casing, and the casing has the cavity that penetrates the casing along the length direction, and one end of the casing is fixed with the locating end plate, and the other end of the casing is detachably fixed with the discharge end plate, and one end of mixing roller one and mixing roller two is connected with the locating end plate through the mode of rotation connection. The utility model discloses through the casing, the locating end plate and the discharge end plate combination, has guaranteed good sealing, has guaranteed the pressure and temperature stability in the mixing process, and because of having adopted detachable discharge end plate, has simplified the operation process when cleaning, overhauls, has been convenient for the maintenance to mixing roller and mixing cavity inner wall.

Description

Technical Field

[0001] This utility model relates to the technical field of mixing equipment for internal mixers, and in particular to a mixing mechanism for internal mixers. Background Technology

[0002] As a key piece of equipment in polymer material processing, the internal mixer's core component is its internal mixing mechanism. The design of this mixing mechanism directly determines the uniformity of material dispersion, mixing efficiency, and the quality of the final product.

[0003] Currently, the mixing chambers in existing internal mixers are mostly of an integral structure or use complex flap-type discharge gates. After a batch of materials is mixed, incomplete discharge can easily leave residual material adhering to the chamber and rollers, resulting in material waste and batch-to-batch contamination. This also brings a huge workload and difficulty to equipment cleaning, seriously affecting production efficiency and product quality stability. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a mixing mechanism for an internal mixer, so as to solve the problem that the mixing chambers in existing internal mixers are mostly integral structures or use complex flap-type discharge gates. After a batch of materials is mixed, the discharge is incomplete, and residual materials are easy to adhere to the chamber and rollers, resulting in material waste and contamination between production batches.

[0005] To achieve the above objectives, this utility model provides a mixing mechanism for an internal mixer, comprising a mixing shell fixedly connected to a frame, the mixing shell having a mixing chamber opening upwards, and mixing roller one and mixing roller two being rotatably mounted inside the mixing chamber. The mixing shell includes a housing, the housing having a cavity extending through the housing along its length, a positioning end plate fixed to one end of the housing and fixedly connected to the frame, and a discharge end plate detachably fixed to the other end of the housing. The positioning end plate and the discharge end plate combine to seal the cavity and form the mixing chamber. One end of mixing roller one and mixing roller two are rotatably connected to the positioning end plate, and the other end of mixing roller one and mixing roller two are rotatably connected to the discharge end plate.

[0006] In an optional example, two sets of positioning bearings are fixed to the end of the positioning end plate facing away from the unloading end plate, and one end of the mixing roller one and the mixing roller two passes through the positioning end plate and is inserted into the corresponding positioning bearing.

[0007] In an alternative example, the mixing roller one extends a positioning bearing toward the end away from the discharge end plate, and a driven gear one is fixed on the outer wall of the mixing roller one. The mixing roller two extends a positioning bearing toward the end away from the discharge end plate, and a driven gear two is fixed on the outer wall of the mixing roller two. The driven gear one and the driven gear two mesh with each other.

[0008] In an optional example, a discharge bearing is fixed on the discharge end plate in the direction away from the housing, and the other ends of the mixing roller one and mixing roller two pass through the positioning end plate and are inserted into the corresponding discharge bearings.

[0009] In an optional example, a guide ring is fixed inside the unloading bearing, and a conical groove is provided inside the guide ring. The mixing roller one and mixing roller two are provided with conical protrusions that match the conical groove at the ends facing away from the positioning end plate.

[0010] In an optional example, the unloading end plate has two sets of mounting grooves facing away from the housing. The mounting grooves have unloading through holes that penetrate the unloading end plate. The unloading bearing is inserted into the mounting groove. Mixing roller one and mixing roller two pass through the unloading through holes and are inserted and fixed with the corresponding unloading bearings. An annular end cap that is fixedly connected to the unloading end plate is provided outside the mounting groove.

[0011] In an optional example, a movable rotating assembly is fixed to the housing. The movable rotating assembly has a movable end that can move along the length of the housing. The movable end is connected to the unloading end plate by rotation. At least one quick-connect is fixed to the unloading end plate. The quick-connect is connected to the housing by a threaded connection.

[0012] In an optional example, the housing has a first sliding groove and a second sliding groove arranged along the length of the housing. A first slider is slidably inserted into the first sliding groove, and a second slider is slidably inserted into the second sliding groove. The first slider has a vertical through hole penetrating the first slider, and the second slider has a vertical threaded hole penetrating the second slider. The unloading end plate is provided with an extension flange, and the extension flange has a connecting through hole penetrating the extension flange. A limit rod is inserted into the connecting through hole. The upper end of the limit rod passes through the vertical through hole and is fixed with a limit block. The lower end of the limit rod is inserted into the vertical threaded hole by a threaded connection. The limit block can abut against the outer wall of the housing and fix the limit rod.

[0013] In an optional example, the quick-connect component includes a quick-connect screw, a side through hole is provided on the unloading end plate, a quick-connect threaded hole is provided on the housing, the quick-connect screw has a threaded part and an abutting part, the threaded part passes through the side through hole and is inserted into the quick-connect threaded hole by means of threaded connection, so that the abutting part abuts against the unloading end plate.

[0014] In an optional example, the mixing roller one and the mixing roller two have the same structure. The mixing roller one includes a short-diameter body and a long-diameter body that are connected to each other. The outer wall of the long-diameter body is provided with a spiral mixing flange.

[0015] The beneficial effects of this utility model are that the combination of the shell, positioning end plate and discharge end plate ensures good sealing performance, ensuring stable pressure and temperature during the mixing process, which is crucial for the mixing process of polymer materials and helps to improve the uniformity of product quality. In addition, since one end of the mixing shell adopts a detachable discharge end plate, cleaning and maintenance can be carried out simply by opening the discharge end plate, simplifying the operation process and facilitating the maintenance of the mixing roller and the inner wall of the mixing chamber. At the same time, the two ends of the mixing roller are supported on the positioning end plate and the discharge end plate respectively, forming a stable double support structure, ensuring the stability and balance of the mixing roller under high speed and high load rotation, and extending the service life of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an installation diagram of an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of an embodiment of the present utility model. Figure 1 ; Figure 3 This is a three-dimensional structural diagram of an embodiment of the present utility model. Figure 2 ; Figure 4 This is a schematic diagram of the exploded structure of an embodiment of the present utility model. Figure 1 ; Figure 5 This is a schematic diagram of the exploded structure of an embodiment of the present utility model. Figure 2 ; Figure 6 This is a schematic diagram of the three-dimensional structure of the shell in the embodiment of this utility model. Figure 1 ; Figure 7This is a schematic diagram of the three-dimensional structure of the shell in the embodiment of this utility model. Figure 2 .

[0018] The markings in the diagram are as follows: 1. Shell; 101. Cavity; 102. First slide groove; 103. Second slide groove; 104. Quick-connect threaded hole; 2. Positioning end plate; 201. End plate bearing groove; 3. Unloading end plate; 31. Mounting groove; 32. Unloading through hole; 33. Extension flange; 34. Connecting through hole; 35. Side through hole; 4. Mixing roller one; 41. Short diameter body; 42. Long diameter body; 43. Mixing flange; 5. Mixing roller two; 6. Positioning bearing 7. Driven gear one; 8. Driven gear two; 9. Unloading bearing; 10. Guide ring; 11. Conical groove; 12. Conical protrusion; 13. Annular end cap; 14. First slider; 141. Vertical through hole; 15. Second slider; 151. Vertical threaded hole; 16. Limiting rod; 17. Limiting block; 18. First protrusion; 181. First waist-shaped groove; 19. Second protrusion; 191. Second waist-shaped groove; 20. Quick-connect screw; 21. Contact part. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] In one embodiment, please refer to Figures 1 to 3As shown, the present invention provides a mixing mechanism for an internal mixer, including a mixing shell fixedly connected to the frame. The mixing shell has a mixing chamber with an upward opening. A mixing roller 4 and a mixing roller 5 are rotatably mounted inside the mixing chamber. An external pressing mechanism is located above the mixing mechanism and is connected to the frame. The pressing mechanism has a vertically movable end capable of vertical movement. Raw materials pass through the opening into the mixing chamber, and the vertically movable end can move to the opening of the mixing chamber and seal it.

[0022] The mixing chamber includes a shell 1, which has a cavity 101 extending through it along its length. A positioning end plate 2 is bolted to one end of the shell 1 and is fixedly connected to the frame via bolts. A discharge end plate 3 is detachably fixed to the other end of the shell 1. The positioning end plate 2 and the discharge end plate 3 together seal the cavity 101 and form a mixing chamber. One end of mixing roller 4 and mixing roller 5 are rotatably connected to the positioning end plate 2, and the other end of mixing roller 4 and mixing roller 5 are rotatably connected to the discharge end plate 3. The mixing roller 4 and mixing roller 5 rotate relative to each other to achieve material shearing and mixing.

[0023] Specifically, this example combines the housing 1, the positioning end plate 2, and the discharge end plate 3 to ensure good sealing performance, thereby ensuring stable pressure and temperature during the mixing process. This is crucial for the mixing process of polymer materials and helps improve the uniformity of product quality. Furthermore, since one end of the mixing housing uses a detachable discharge end plate 3, cleaning and maintenance can be performed simply by opening the discharge end plate 3, simplifying the operation process and facilitating the maintenance of the mixing roller and the inner wall of the mixing chamber. At the same time, the two ends of the mixing roller are supported on the positioning end plate 2 and the discharge end plate 3 respectively, forming a stable double support structure. This ensures the stability and balance of the mixing roller under high-speed and high-load rotation, extending the service life of the equipment.

[0024] In an optional example, please refer to Figures 1 to 5 As shown, two sets of positioning bearings 6 are fixed on the end of the positioning end plate 2 facing away from the unloading end plate 3. One end of the mixing roller 4 and the mixing roller 5 passes through the positioning end plate 2 and is inserted into the corresponding positioning bearing 6. The positioning end plate 2 is provided with an end plate bearing groove 201, and the positioning bearing 6 is inserted into the end plate bearing groove 201.

[0025] Specifically, this example provides extremely stable and precise radial positioning for the drive ends of mixing roller 4 and mixing roller 5 by setting two sets of dedicated positioning bearings 6 on the outside of the positioning end plate 2. These bearings can withstand the large torque and huge radial force generated during the mixing process, effectively prevent the roller shaft from moving, and ensure that the meshing gap between mixing roller 4 and mixing roller 5 is constant, thereby ensuring the stability of the mixing quality.

[0026] In an optional example, please refer to Figures 1 to 5 As shown, a positioning bearing 6 extends from the end of mixing roller 4 away from the discharge end plate 3. A driven gear 7 is fixed on the outer wall of mixing roller 4 by a key connection. A positioning bearing 6 extends from the end of mixing roller 5 away from the discharge end plate 3. A driven gear 8 is fixed on the outer wall of mixing roller 5 by a key connection. Driven gear 7 and driven gear 8 mesh with each other.

[0027] Specifically, this example ensures that the mixing roller 4 and the mixing roller 5 rotate synchronously at all times through the meshing driven gear 7 and driven gear 8, achieving efficient and uniform mixing. This avoids equipment failure or uneven mixing caused by differences in speed or incorrect direction. Furthermore, the entire drive and transmission system is located outside the mixing chamber and concentrated on one side, so there is no need to open the mixing chamber or disassemble the mixing rollers when maintenance is required, making maintenance very convenient.

[0028] In an optional example, please refer to Figures 1 to 5 As shown, a discharge bearing 9 is fixed on the discharge end plate 3 in the direction away from the housing 1. The other ends of the mixing roller 1 4 and the mixing roller 2 5 pass through the positioning end plate 2 and are inserted into the corresponding discharge bearing 9.

[0029] Specifically, this example achieves complete opening of the mixing chamber by disassembling the unloading end plate 3, which facilitates material discharge and internal cleaning.

[0030] In an optional example, please refer to Figures 1 to 5 As shown, a guide ring 10 is fixed inside the unloading bearing 9 by an interference fit. A conical groove 11 is provided inside the guide ring 10. A conical protrusion 12 matching the conical groove 11 is provided at the end of the mixing roller 4 and the mixing roller 5 facing away from the positioning end plate 2.

[0031] Specifically, in this example, through the cooperation of the guide ring 10 and the conical protrusion 12, the conical structure automatically completes the final precise positioning when the unloading end is closed, which simplifies the assembly process, shortens the maintenance time, and improves the equipment utilization rate. Moreover, the conical cooperation has excellent self-centering characteristics. During the process of closing the unloading end plate 3, even if there is a slight positional deviation, the conical protrusion 12 can automatically guide the mixing roller 4 and the mixing roller 5 to adjust to the precise preset center position when entering the conical groove 11. There is no need for repeated manual adjustments, and the centering accuracy is extremely high and stable.

[0032] In an optional example, please refer to Figures 1 to 5As shown, two sets of mounting grooves 31 are formed on the unloading end plate 3 facing away from the housing 1. Unloading through holes 32 are formed within the mounting grooves 31, and unloading bearings 9 are inserted into the mounting grooves 31. Mixing roller 4 and mixing roller 5 pass through the unloading through holes 32 and are fixedly inserted into the corresponding unloading bearings 9. An annular end cap 13 is provided outside the mounting grooves 31 and is fixedly connected to the unloading end plate 3. The annular end cap 13 is fixedly connected to the unloading end plate 3 by bolts.

[0033] Specifically, this example adopts a modular structure design for the unloading end plate 3, which enables rapid maintenance, reduces the maintenance time and cost of the mixing mechanism, and the unloading bearing 9 is installed in the mounting groove 31 and pressed by the annular end cover 13 to form a rigid support unit, which can effectively suppress vibration.

[0034] In an optional example, please refer to Figures 1 to 5 As shown, a movable rotating assembly is fixed on the housing 1. The movable rotating assembly has a movable end that can move along the length of the housing 1. The movable end is connected to the unloading end plate 3 by rotation. At least one quick connector is fixed on the unloading end plate 3. The quick connector is connected to the housing 1 by threaded connection.

[0035] Specifically, this example demonstrates that by controlling the moving and rotating components, the linear movement and disengagement of the end plate and the rotational swinging action can be easily achieved, reducing the labor intensity of the operator, improving the safety of the unloading end plate 3 when opening and closing, and the threaded connection of the quick-connect provides a direct connection method with huge locking force, fast opening and closing speed, and reliable sealing.

[0036] In an optional example, please refer to Figures 1 to 6As shown, the housing 1 has a first sliding groove 102 and a second sliding groove 103 arranged along the length of the housing 1. A first slider 14 is slidably inserted in the first sliding groove 102, and a second slider 15 is slidably inserted in the second sliding groove 103. A vertical through hole 141 is provided on the first slider 14, and a vertical threaded hole 151 is provided on the second slider 15. An extension flange 33 is provided on the extension flange 33, and a connecting through hole 34 is provided on the extension flange 33. A limiting rod 16 is inserted in the connecting through hole 34. The upper end of the limiting rod 16 passes through the vertical through hole 141 and is fixed with a limiting block 17. The lower end of the limiting rod 16 is inserted into the vertical threaded hole 151 by a threaded connection. The limiting block 17 can abut against the outer wall of the housing 1 and fix the limiting rod 16. The housing 1 is provided with a first protrusion 18 and a second protrusion 19. A first sliding groove 102 is opened at the upper end of the first protrusion 18, and a first waist-shaped groove 181 is opened in the first sliding groove 102. A second sliding groove 103 is opened at the lower end of the second protrusion 19, and a second waist-shaped groove 191 is opened in the second sliding groove 103. A limiting rod 16 passes through the first waist-shaped groove 181 and the second waist-shaped groove 191. When locking is required, the operator rotates the limiting block 17, which drives the limiting rod 16 to rotate. The limiting rod 16 drives the limiting block 17 to move toward or away from the second slider 15, thereby realizing the opening and closing of the unloading end plate 3.

[0037] Specifically, this example achieves the movement and rotation of the unloading end plate 3 through the cooperation of the first slider 14, the second slider 15, the limiting rod 16 and the limiting block 17, thus providing conditions for the movement and rotation of the unloading end plate 3.

[0038] In an optional example, please refer to Figures 1 to 6 As shown, the quick-connect component includes a quick-connect screw 20. A side through-hole 35 is provided on the unloading end plate 3, and a quick-connect threaded hole 104 is provided on the housing 1. The quick-connect screw 20 has a threaded portion and an abutting portion 21. The threaded portion passes through the side through-hole 35 and is inserted into the quick-connect threaded hole 104 via a threaded connection, causing the abutting portion 21 to abut against the unloading end plate 3. When the unloading end plate 3 is closed in place, the threaded portion of the quick-connect screw 20 is passed through the side through-hole 35 of the unloading end plate 3 and screwed into the quick-connect threaded hole 104 of the housing 1. As the screw is screwed in, its abutting portion 21 tightly abuts against the side wall of the unloading end plate 3, thereby generating a strong tensile force from the side, firmly fixing the unloading end plate 3.

[0039] Specifically, in this example, the tension force generated by the quick-connect fitting acts directly on the main sealing mating surface between the unloading end plate 3 and the housing 1, which can uniformly compress and seal, achieving a good sealing effect and preventing leakage. It is simple to manufacture and has low cost.

[0040] In an optional example, please refer to Figures 1 to 6 As shown, the mixing roller 4 and the mixing roller 5 have the same structure. The mixing roller 4 includes a short-diameter body 41 and a long-diameter body 42 that are connected to each other. A spiral mixing flange 43 is provided on the outer wall of the long-diameter body 42.

[0041] Specifically, in this example, the spiral flange generates a continuous axial thrust on the material as it rotates with the roller, forcing the material to undergo strong axial reciprocating motion from one end to the other within the mixing chamber. This creates a three-dimensional, multi-dimensional mixing effect, greatly improving the uniformity of material dispersion and mixing efficiency. Furthermore, the pushing action of the spiral flange effectively prevents the material from adhering to the roller surface or stagnating in the dead corner of the chamber 101, exhibiting a significant self-cleaning effect.

[0042] In summary, this utility model, through the combination of the housing 1, the positioning end plate 2, and the unloading end plate 3, ensures good sealing performance and guarantees stable pressure and temperature during the mixing process, which is crucial for the mixing process of polymer materials and helps to improve the uniformity of product quality. Furthermore, since one end of the mixing shell uses a detachable unloading end plate 3, cleaning and maintenance can be performed simply by opening the unloading end plate 3, simplifying the operation process and facilitating the maintenance of the mixing roller and the inner wall of the mixing chamber. At the same time, the entire drive and transmission system is located outside the mixing chamber and concentrated on one side, making maintenance very convenient.

[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0044] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mixing mechanism for an internal mixer, comprising a mixing shell fixedly connected to a frame, the mixing shell having a mixing chamber opening upwards, wherein a mixing roller one (4) and a mixing roller two (5) are rotatably mounted within the mixing chamber, characterized in that: The mixing shell includes a shell (1), the shell (1) having a cavity (101) extending through the shell (1) along its length, a positioning end plate (2) fixed at one end of the shell (1), the positioning end plate (2) being fixedly connected to the frame, and a discharge end plate (3) detachably fixed at the other end of the shell (1), the positioning end plate (2) and the discharge end plate (3) forming a sealed cavity (101) and a mixing chamber, one end of mixing roller one (4) and mixing roller two (5) being connected to the positioning end plate (2) by a rotatable connection, and the other end of mixing roller one (4) and mixing roller two (5) being connected to the discharge end plate (3) by a rotatable connection.

2. The mixing mechanism for an internal mixer according to claim 1, characterized in that, Two sets of positioning bearings (6) are fixed on one end of the positioning end plate (2) facing away from the unloading end plate (3). One end of the mixing roller one (4) and the mixing roller two (5) passes through the positioning end plate (2) and is inserted into the corresponding positioning bearing (6).

3. The mixing mechanism for an internal mixer according to claim 2, characterized in that, The mixing roller 1 (4) extends a positioning bearing (6) at one end away from the unloading end plate (3). A driven gear 1 (7) is fixed on the outer wall of the mixing roller 1 (4). The mixing roller 2 (5) extends a positioning bearing (6) at one end away from the unloading end plate (3). A driven gear 2 (8) is fixed on the outer wall of the mixing roller 2 (5). The driven gear 1 (7) meshes with the driven gear 2 (8).

4. The mixing mechanism for an internal mixer according to claim 3, characterized in that, The unloading end plate (3) is fixed with an unloading bearing (9) facing away from the housing (1). The other ends of the mixing roller one (4) and mixing roller two (5) pass through the positioning end plate (2) and are inserted into the corresponding unloading bearing (9).

5. The mixing mechanism for an internal mixer according to claim 4, characterized in that, The unloading bearing (9) is fixed with a guide ring (10), and the guide ring (10) is provided with a conical groove (11). The mixing roller one (4) and the mixing roller two (5) are provided with a conical protrusion (12) that matches the conical groove (11) at the end facing away from the positioning end plate (2).

6. The mixing mechanism for an internal mixer according to claim 5, characterized in that, The unloading end plate (3) has two sets of mounting grooves (31) facing away from the shell (1). The mounting groove (31) has a discharge through hole (32) that penetrates the unloading end plate (3). The unloading bearing (9) is inserted into the mounting groove (31). The mixing roller one (4) and mixing roller two (5) pass through the discharge through hole (32) and are inserted and fixed with the corresponding unloading bearing (9). An annular end cap (13) that is fixedly connected to the unloading end plate (3) is provided outside the mounting groove (31).

7. The mixing mechanism for an internal mixer according to claim 6, characterized in that, A movable rotating assembly is fixed on the housing (1). The movable rotating assembly has a movable end that can move along the length of the housing (1). The movable end is connected to the unloading end plate (3) by rotation. At least one quick connector is fixed on the unloading end plate (3). The quick connector is connected to the housing (1) by threaded connection.

8. The mixing mechanism for a mixer according to claim 7, characterized in that, The housing (1) is provided with a first sliding groove (102) and a second sliding groove (103) arranged along the length direction of the housing (1). A first slider (14) is slidably inserted in the first sliding groove (102), and a second slider (15) is slidably inserted in the second sliding groove (103). A vertical through hole (141) is provided on the first slider (14), and a vertical threaded hole (151) is provided on the second slider (15). The unloading end plate (3) An extension flange (33) is provided on the upper part, and a connecting through hole (34) is provided on the extension flange (33). A limiting rod (16) is inserted into the connecting through hole (34). The upper end of the limiting rod (16) passes through the vertical through hole (141) and is fixed with a limiting block (17). The lower end of the limiting rod (16) is inserted into the vertical threaded hole (151) by means of threaded connection. The limiting block (17) can abut against the outer wall of the housing (1) and fix the limiting rod (16).

9. The mixing mechanism for an internal mixer according to claim 7, characterized in that, The quick-connect component includes a quick-connect screw (20), and the unloading end plate (3) has a side through hole (35) that penetrates the unloading end plate (3). The housing (1) has a quick-connect threaded hole (104). The quick-connect screw (20) has a threaded part and an abutting part (21). The threaded part passes through the side through hole (35) and is inserted into the quick-connect threaded hole (104) by means of threaded connection, so that the abutting part (21) abuts against the unloading end plate (3).

10. The mixing mechanism for a mixer according to claim 1, characterized in that, The mixing roller 1 (4) has the same structure as the mixing roller 2 (5). The mixing roller 1 (4) includes a short diameter body (41) and a long diameter body (42) connected to each other. The outer wall of the long diameter body (42) is provided with a spiral mixing flange (43).

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