Open type rubber mixing mill

Abstract

The invention relates to an open type rubber mixing mill, and relates to the field of rubber processing equipment, in particular to an open type rubber mixing mill. The rubber mixing mill comprises a machine frame, a first roller and a second roller, the first roller and the second roller are rotationally arranged on the machine frame, a guide plate and a scraper are arranged on the machine frame, the scraper abuts against the second roller, and a guide gap is formed between the guide plate and the first roller, so that material flowing is facilitated. In the initial stage of rubber mixing, the guide plate can be turned over upwards so that the scraper can abut against the second roller, a guide gap is reserved between the guide plate and the first roller in the state, and a material belt falling from the gap between the first roller and the second roller can be conveyed again along with the guide plate more easily and wound on the outer side of the first roller in the state. And in the process, the guide plate is mainly used for assisting, the guide plate only needs to be rotated by a hand, the hand does not need to stretch into the position below the gap between the first roller and the second roller, and safety is higher.

Description

Technical Field

[0001] The present application relates to the technical field of colloid product processing equipment, and in particular to an open rubber mixing machine. Background Art

[0002] Most of the colloidal raw materials are in block form, usually milky white. And most of the colloidal raw materials cannot be directly hot-pressed and need to be added with vulcanizers (ripening agents). For example, when the product has special requirements such as color, luminous, fluorescent, conductive, etc., it is also necessary to add masterbatch, luminous powder, fluorescent powder, conductive particles, etc. Therefore, at this time, the raw materials need to be put together with the vulcanizer and other required additives, and mixed in a rubber mixer before they can be used for subsequent further production.

[0003] The rubber mixing machine in the related technology usually includes a frame and two rollers rotatably arranged on the frame. The two rollers are rotated by their own driving mechanisms to achieve the purpose of the two rollers rotating in different directions. During the rubber mixing process, the colloid raw materials and other additives are mixed and then drawn into the gap between the two rollers as the rollers rotate. The raw materials and additives are mixed under strong shearing action to achieve the purpose of plasticating or mixing.

[0004] In the early stage of rubber mixing, that is, when the block-shaped raw materials are initially placed in the gap between the two rollers, the raw materials are easy to fall directly onto the surface of the frame. During this process, people need to reach under the rollers and manually wind the extruded material strip to the outside of the rollers to form the material strip into a closed loop, and then it can be stably wound on the outside of the rollers for subsequent continuous rubber mixing.

[0005] The above-mentioned related technologies have the following defects: the method of extending a hand under the roller for preliminary assistance is less safe, so it needs to be improved. Summary of the invention

[0006] In order to reduce the manual intervention required in the initial operation of the equipment, the present application provides an open rubber mixing mill.

[0007] An open rubber mixing machine comprises a frame and a roller 1 and a roller 2 rotatably arranged on the frame, the frame is connected with a driving mechanism for driving the roller 1 and the roller 2 to rotate in different directions respectively, the frame is located below the roller 1 and is rotatably provided with a guide plate, one end of the guide plate extends below the roller 2 and is connected with a scraper, the scraper is against the roller 2, the other end of the guide plate is located on the side of the roller 1 away from the roller 2, and a guiding gap is provided between the guide plate and the roller 1.

[0008] By adopting the above technical solution, in the early stage of rubber refining, the guide plate can be flipped upwards so that the scraper and roller two are against each other. In this state, a guide gap is left between the guide plate and roller one. In this state, the material belt falling from the gap between roller one and roller two will be easier to be re-conveyed and wound around the outside of roller one along with the guide plate, so that the raw material is finally turned into a ring and stably wound around the outside of roller one. This process is mainly assisted by the guide plate. The human hand only needs to rotate the guide plate, and there is no need to put the hand under the gap between roller one and roller two. Therefore, although manual assistance is also required, it is safer and mainly assisted by the guide plate, so the degree of manual participation can actually be reduced.

[0009] Preferably, a main airway and a plurality of branch airways connected to the main airway are arranged inside the scraper, the main airway is connected to an external air source, and the branch airways face downwardly of the roller.

[0010] By adopting the above technical solution, after the guide plate completes the auxiliary work, the guide plate can be rotated downward to abut against the top of the frame. In this state, the distance between the guide plate and roller one becomes larger, which is beneficial to the heat dissipation of roller one and the material belt. In addition, an external air source is used to supply air to the main air duct and branch air duct inside the scraper, and air can eventually be actively supplied through several branch air ducts, thereby further improving the heat dissipation effect of roller one and the material belt.

[0011] Preferably, a slider is slidably provided inside the airway, the side wall of the slider is connected to a limit key, the side wall of the airway is provided with a key slot for the limit key to be inserted and slide, a bronchial hole is provided inside the slider, one end of the bronchial hole is connected to the airway and the other section extends to the side wall of the slider, and the bronchial side wall covers one end of the bronchial hole extending to the side wall of the slider.

[0012] By adopting the above technical solution, when the guide plate is performing auxiliary work, the external air source is not connected to the air supply. In this state, the slider shrinks to the inside of the bronchial passage under the action of gravity, so that the surface of the guide plate is flat, and the slider is prevented from obstructing the guide of the material belt after extending out of the bronchial passage. When the guide plate completes the auxiliary work, the external air source is connected for air supply. In this state, the slider is pushed outward under the action of air pressure, and finally the limit is achieved under the cooperation relationship between the limit key and the key slot. At this time, the slider has a part extending out of the bronchial passage and the bronchial hole also extends out of the bronchial passage to achieve active air supply. On the whole, the automatic switching between the air supply state and the storage state can be achieved by adopting the above solution.

[0013] Preferably, a limiting elastic member for pulling the slider inward is connected between the main air channel and the slider.

[0014] By adopting the above technical solution, after the guide plate completes the auxiliary work and is connected to an external air source for air supply, the slider is pushed outward under the action of air pressure and finally limited under the cooperation relationship between the limit key and the key slot. At this time, the slider partially extends out of the airway and the air hole also extends out of the airway to achieve active air supply. When the external air source is not connected, the limit elastic part pulls the slider inward to shrink it to the inside of the airway to keep the surface of the guide plate flat and avoid the slider from extending out of the airway to hinder the guide of the material belt. On the whole, this design can ensure the automatic switching of the slider under different working conditions, which not only ensures the effectiveness of the guiding function, but also improves the reliability and safety of the system.

[0015] Preferably, the main air passage is connected with an extension hole, and the extension hole extends from one end away from the main air passage to the side wall of the scraper on the side close to the second roller.

[0016] By adopting the above technical solution, when the guide plate is in the state of assisting work, the scraper and roller 2 are against each other, and roller 2 continues to rotate, while the extension hole is close to the side wall of roller 2. In this state, the side wall of roller 2 drives the air to flow quickly, so that airflow is generated outside the extension hole, and then a certain negative pressure is formed in the extension hole, affecting the pressure change in the main airway and the bronchial airway. This can effectively limit the slider from sliding out of the bronchial airway in the storage state, improve the stability of the slider in the non-working state, and thus ensure the safety and reliability of the device.

[0017] Preferably, a discharging tool is provided at one end of the guide plate away from the scraper, the discharging tool is slidably connected to the guide plate, and the sliding direction of the discharging tool is arranged parallel to the axial direction of the roller.

[0018] By adopting the above technical solution, after the rubber mixing is completed, the unloading tool can be used to split the annular material belt to complete the stripping of the material belt and roller one. Specifically, the unloading tool is slidably connected to the guide plate, and its sliding direction is set parallel to the axial direction of roller one, so that the unloading tool can be moved more conveniently along the length direction of roller one during operation, ensuring that the material belt can be evenly and thoroughly stripped from roller one. In addition, this method not only improves work efficiency, but also reduces the risk of manual operation, and improves the safety and practicality of the entire rubber mixing machine.

[0019] Preferably, the guide plate is provided with a slide groove, a slide seat is slidably provided in the slide groove, and the unloading tool is connected to the slide seat;

[0020] The unloading tool comprises a unloading rod and a unloading hemisphere which are coaxially arranged. The unloading hemisphere abuts against a roller. The unloading rod is rotatably connected to a slide seat. The slide seat is connected with a driving assembly for realizing the rotation of the unloading rod.

[0021] By adopting the above technical solution, this design allows the annular material belt to be cut by sliding the unloading cutter after the rubber mixing is completed, and the rotation of the unloading hemisphere can effectively lift the material belt, so that its edge continues to separate from roller 1 and climbs up along the unloading rod, and finally completes the stripping of the material belt from roller 1. The whole process is easy to operate, improves production efficiency, reduces manual intervention, and reduces labor intensity.

[0022] Preferably, the driving assembly includes a driving gear and a driving rack, the driving rack is arranged on the inner wall of the slide groove, the driving gear is coaxially arranged with the discharge rod, and the driving gear is meshed with the driving rack.

[0023] By adopting the above technical solution, after the rubber mixing is completed, when the slide moves in the slide groove, the driving gear rotates under the action of the driving rack, driving the unloading rod and the unloading hemisphere to rotate synchronously. The rotation of the unloading hemisphere can effectively lift the material belt, so that the edge of the material belt gradually separates from the roller one, and climbs up along the unloading rod, and finally realizes the complete separation of the material belt and the roller one, thereby improving the unloading efficiency and the convenience of operation.

[0024] Preferably, a mounting hole is provided on the side wall of the slide seat, an oil-soaked sponge is provided in the mounting hole, and the oil-soaked sponge abuts against the inner wall of the slide groove.

[0025] By adopting the above technical solution, the oil-soaked sponge can effectively reduce the friction between the slide and the inner wall of the slide groove during the sliding process of the slide, thereby reducing the sliding resistance and improving the movement stability of the unloading tool. At the same time, the presence of the oil-soaked sponge can also extend the service life of the slide and the slide groove, ensuring smoothness and reliability during long-term use.

[0026] Preferably, an oil filling hole is provided through the mounting hole, and the opening of the oil filling hole is arranged upward.

[0027] By adopting the above technical solution, during the sliding process of the guide plate slide, the friction resistance between the slide and the inner wall of the slide groove can be effectively reduced, and at the same time it is convenient to add lubricating oil to the oil-immersed sponge, thereby ensuring smooth sliding of the slide and improving the working efficiency and reliability of the unloading tool.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The design of the guide plate effectively solves the problem of raw materials falling easily in the early stage of rubber mixing. Through the auxiliary role of the guide plate, the material belt is easier to be re-conveyed and wound around the outer side of the roller, thereby reducing the need for manual intervention and improving the safety of operation.

[0030] 2. The scraper and guide plate are used together to guide the material belt stably in the early stage of rubber mixing and realize efficient heat dissipation in the later stage. The main airway and branch airway design inside the scraper can realize active air supply through external air source after the guide plate completes the auxiliary work, further improving the heat dissipation effect of the roller and the material belt.

[0031] 3. The design of the unloading tool makes it easy to peel the material strip from the roller after the rubber mixing is completed, reducing the workload of manual cutting, improving work efficiency and reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application. In this state, the guide plate rotates downward until it abuts against the frame;

[0033] Figure 2 This is a schematic diagram of the structure used to reflect the state in which the guide plate rotates upward to the state where the scraper and the roller are in contact with each other in the embodiment of the present application;

[0034] Figure 3 This is a structural schematic diagram for reflecting the connection relationship between the main airway and the guide plate in the embodiment of the present application;

[0035] Figure 4 This is a structural schematic diagram for reflecting the connection relationship between the bronchial passage and the guide plate in the embodiment of the present application;

[0036] Figure 5 This is a schematic diagram of the structure in the embodiment of the present application for reflecting the state in which the air vents are leaking after the slider is ejected;

[0037] Figure 6 This is a schematic diagram of the structure used to reflect the state in which the unloading tool and the roller are in contact with each other in the embodiment of the present application;

[0038] Figure 7 It is a structural schematic diagram used to illustrate the connection relationship between the unloading tool and the guide plate in the embodiment of the present application.

[0039] In the figure:

[0040] 1. Frame; 11. Roller 1; 12. Roller 2;

[0041] 2. Guide plate; 21. Scraper; 22. Guide gap; 23. Slide groove; 24. Slide seat;

[0042] 3. Main airway; 31. Branch airway; 32. Sliding block; 33. Limiting key; 34. Keyway; 35. Limiting elastic member; 36. Extension hole; 37. Branch airway;

[0043] 4. Unloading tool; 41. Unloading rod; 42. Unloading hemisphere;

[0044] 5. driving assembly; 51. driving gear; 52. driving rack;

[0045] 6. Oil-soaked sponge; 61. Mounting hole; 62. Oil filling hole. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0047] The inventor of the present application has found that most of the colloidal raw materials are in block form, generally milky white. Moreover, most of the colloidal raw materials cannot be directly hot-pressed and need to be added with a vulcanizing agent (ripening agent). For another example, when the product has special requirements such as color, luminous, fluorescent, conductive, etc., it is also necessary to add masterbatch, luminous powder, fluorescent powder, conductive particles, etc. accordingly. Therefore, at this time, the raw materials need to be put together with the vulcanizing agent and other required additives, and can only be used for subsequent further production after being mixed in a rubber mixer.

[0048] The rubber mixer in the related art usually includes a frame and two rollers rotatably arranged on the frame. The two rollers are rotated by their own driving mechanisms to achieve the purpose of the two rollers rotating in different directions. During the rubber mixing process, the colloid raw materials and other additives are mixed and rolled into the gap between the two rollers as the rollers rotate. The raw materials and additives are mixed under strong shearing action to achieve the purpose of plastication or mixing. However, the method of inserting hands under the rollers for preliminary assistance is less safe, so it needs to be improved.

[0049] To this end, the present application mainly adopts the following open rubber mixing machine, which improves the operational safety in the early stage of rubber mixing, reduces the frequency and intensity of manual intervention, and significantly improves the overall performance of the rubber mixing machine. The present application is further described in detail below.

[0050] Example

[0051] Reference Figure 1 and Figure 2 The open rubber mixing mill provided in the embodiment of the present application includes a frame 1 and a roller 11 and a roller 12 rotatably arranged on the frame 1. The frame 1 is connected with a driving mechanism for driving the roller 11 and the roller 12 to rotate in different directions respectively. The driving mechanism can be used to squeeze the rubber material from the upper part of the gap between the roller 11 and the roller 12 to the lower part of the gap between the roller 11 and the roller 12.

[0052] The frame 1 is located below the roller 11 and is provided with a guide plate 2 which is rotated by a rotating shaft and can be turned over manually or electrically. The guide plate 2 can be made of metal materials, such as stainless steel or aluminum alloy, to ensure its wear resistance and corrosion resistance. One end of the guide plate 2 extends to the bottom of the roller 12 and is fixedly connected with a scraper 21. When the guide plate 2 is turned upward, the scraper 21 abuts against the roller 12. At this time, a guide gap 22 is left between the guide plate 2 and the roller 11, so that the material belt can smoothly enter the guide gap 22 and be rewound on the outside of the roller 11 under the action of the guide plate 2. In this way, in the early stage of rubber refining, the worker only needs to simply turn over the guide plate 2 to achieve auxiliary guidance without having to put his hands into the dangerous area, which greatly improves the safety of the operation.

[0053] Specifically, the scraper 21 can be made of wear-resistant materials, such as high molecular polyethylene (PE) or nylon, to reduce friction loss. The contact surface between the scraper 21 and the roller 12 can be designed to be flat or have a surface with tiny protrusions to increase the gripping force and prevent the material strip from slipping. In addition, in other embodiments, the scraper 21 can also be designed to be detachable, which is convenient for cleaning and replacement, so as to facilitate maintenance after wear.

[0054] In actual use, when the block material is first placed in the gap between the two rollers, it is easy to fall directly onto the surface of the frame 1 due to its irregular shape. At this time, by turning the guide plate 2 upward, the scraper 21 is closely fitted with the roller 12, and the material belt is forced to be guided to the guide gap 22 between the guide plate 2 and the roller 1 11 when passing through the scraper 21. In this process, the material belt is guided by the guide plate 2, gradually forms a closed loop and is stably wound around the outside of the roller 1 11, thereby successfully completing the initial preparation work of rubber mixing.

[0055] In addition, refer to Figure 3 and Figure 4 In order to further improve the heat dissipation effect of the rubber mixer during the continuous rubber mixing process, the scraper 21 is also provided with a main airway 3 and a plurality of branch airways 31 connected to the main airway 3. The main airway 3 is connected to an external air source, and the branch airway 31 is located below the roller 11, so that the external air source can be used to supply air when heat dissipation is required, thereby actively supplying air to the bottom of the roller 11. After the guide plate 2 completes the auxiliary work, the guide plate 2 can be rotated downward to abut against the top of the frame 1. In this state, the distance between the guide plate 2 and the roller 11 becomes larger, and the roller 11 and the material belt are used for natural heat dissipation. In addition, the main airway 3 and the branch airway 31 inside the scraper 21 can be supplied with air by an external air source, and active air can be supplied through the plurality of branch airways 31, so as to further improve the heat dissipation effect of the roller 11 and the material belt.

[0056] Specifically, the main air channel 3 can adopt a circular or rectangular cross-section, and the diameter can be adjusted according to actual needs. The number and distribution of the branch air channels 31 can be determined according to the length and width of the scraper 21, and the branch air channels 31 are preferably evenly distributed to ensure that the cold air is evenly distributed at the bottom of the scraper 21. The outlet of the branch air channel 31 can be designed in an oblique or flat mouth form to enhance the injection effect of the airflow and improve the heat dissipation efficiency.

[0057] Reference Figure 4 and Figure 5 , a slider 32 is provided inside the airway 31 to slide, and a limit key 33 is integrally formed on the side wall of the slider 32. A key slot 34 is provided on the side wall of the airway 31 for the limit key 33 to be inserted and slide, so as to limit the stroke of the slider 32 and prevent the slider 32 from completely sliding out of the airway 31. An air hole 37 is provided inside the slider 32, and the bottom of the air hole 37 is connected to the airway 31. The top of the air hole 37 is inclined and extends to the side wall of the slider 32, and the side wall of the airway 31 covers the end of the air hole 37 extending to the side wall of the slider 32. The advantage of this structure is that when the guide plate 2 is in the state of auxiliary work, the external air source is not connected to the air supply. In this state, the slider 32 shrinks to the inside of the airway 31 under the action of gravity to keep the surface of the guide plate 2 flat, so as to prevent the slider 32 from extending out of the airway 31 and hindering the guide of the material belt. When the guide plate 2 completes the auxiliary work, the external air source is connected for air supply, and the slider 32 is pushed outward under the action of air pressure, and finally reaches the limit position under the cooperation relationship between the limit key 33 and the key slot 34. At this time, the slider 32 partially extends out of the bronchial passage 31 and the bronchial hole 37 also extends out of the bronchial passage 31, realizing active air supply. Overall, the automatic switching between the air supply state and the storage state can be realized by adopting the above scheme.

[0058] In addition, in order to further improve the stability of the slider 32 in the storage state, the present application adopts double insurance:

[0059] First, a limiting elastic member 35, such as a spring, is connected between the inner wall of the main airway 3 and the bottom of the slider 32 to pull the slider 32 inward. This helps to more firmly fix the slider 32 inside the bronchial airway 31 when air supply is not required to prevent accidental sliding out.

[0060] In addition, the main airway 3 is connected with an extension hole 36, and the extension hole 36 extends from one end of the main airway 3 to the side wall of the scraper 21 near the roller 12. When the guide plate 2 is in the auxiliary working state, that is, the scraper 21 and the roller 12 are in contact, the roller 12 continues to rotate in this state, thereby driving the surrounding airflow to flow rapidly, so that a certain negative pressure is formed in the extension hole 36, and then the main airway 3 and the branch airway 31 also have a certain negative pressure, which can help limit the sliding of the slider 32 and further improve the stability of the slider 32 in the storage state.

[0061] Reference Figure 6 and Figure 7 In order to further improve the stripping efficiency of the material belt after rubber mixing is completed, a discharge tool 4 is further provided at one end of the guide plate 2 away from the scraper 21. The discharge tool 4 is slidably connected to the guide plate 2. The sliding direction of the discharge tool 4 is set parallel to the axial direction of the roller 11. During the rubber mixing process, the discharge tool 4 slides to the edge position so as not to affect the rubber mixing process. When the rubber mixing is completed, the discharge tool 4 can be slid to split the annular material belt, thereby completing the stripping of the material belt and the roller 11 and completing the unloading.

[0062] Specifically, the guide plate 2 is provided with a slide groove 23, and a slide seat 24 is slidably arranged in the slide groove 23. The unloading tool 4 is actually connected to the slide seat 24 to achieve a sliding connection with the guide plate 2. In addition, the unloading tool 4 specifically includes an integrally formed coaxial unloading rod 41 and a unloading hemisphere 42, and the side wall of the unloading rod 41 is in a concave state. The unloading hemisphere 42 is against the roller 11, and the unloading rod 41 is rotatably connected to the slide seat 24 through a bearing. The present application is also provided with a driving assembly 5 for realizing the rotation of the unloading rod 41. Specifically, the driving assembly 5 includes a driving gear 51 and a driving rack 52. The driving rack 52 is fixedly arranged on the guide plate 2, the driving gear 51 is located outside the unloading rod 41 and is coaxially arranged, the driving gear 51 is fixedly connected to the unloading rod 41, and the driving gear 51 is meshed with the driving rack 52. During the sliding process of the slide 24, the driving gear 51 rotates under the action of the driving rack 52, thereby realizing the synchronous rotation and sliding of the unloading rod 41 and the unloading hemisphere 42. During the rotation and sliding process of the unloading hemisphere 42, the material strip will be lifted, and the edge of the material strip will gradually separate from the roller 11 and climb up along the unloading rod 41, and finally the material strip will be completely peeled off.

[0063] In order to reduce the resistance during the sliding of the slide 24, a mounting hole 61 is provided on the side wall where the slide 24 and the slide groove 23 are actually in contact. An oil-soaked sponge 6 is provided in the mounting hole 61. During the sliding process, the oil-soaked sponge 6 and the inner wall of the slide groove 23 are continuously pressed against each other to oil the inner wall of the slide groove 23, thereby reducing the friction. The presence of the oil-soaked sponge 6 can effectively lubricate the contact surface between the slide 24 and the slide groove 23, reduce friction loss, and improve the smoothness of sliding. In addition, an oil filling hole 62 is provided on the upper side of the inner wall of the mounting hole 61. The oil filling hole 62 opens upward to facilitate the regular addition of lubricating oil to keep the system in good operating condition.

[0064] The implementation principle of this embodiment is:

[0065] By introducing the guide plate 2 and the scraper 21 structure, effective guidance of the material belt in the early stage of rubber refining is achieved, the frequency and intensity of manual intervention are reduced, and the safety and efficiency of the operation are significantly improved. The up and down flipping function of the guide plate 2 enables it to be flexibly switched under different working conditions, which can not only play an auxiliary role in the early stage of rubber refining, but also not affect the normal rubber refining process in the later stage. By setting the main airway 3 and the branch airway 31 inside the scraper 21, combined with the design of the slider 32 and the limit key 33, the intelligent switching between the air supply state and the storage state is realized, the heat problem generated during the rubber refining process is solved, the service life of the equipment is extended, and the quality and production efficiency of rubber refining are improved. By introducing the unloading tool 4 and its drive component 5, the efficient stripping of the material belt after the rubber refining is completed is achieved, the labor intensity of the workers is reduced, and the work efficiency is improved. The design of the unloading tool 4 is ingenious, and complex functions are realized through a simple mechanical structure, which not only ensures the reliability and safety of the stripping process, but also simplifies the maintenance and maintenance work.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An open rubber mixing mill, comprising a frame (1) and a first roller (11) and a second roller (12) rotatably arranged on the frame (1), wherein the frame (1) is connected to a driving mechanism for driving the first roller (11) and the second roller (12) to rotate in different directions, and characterized in that: The frame (1) is located below the first roller (11) and is rotatably provided with a guide plate (2); one end of the guide plate (2) extends below the second roller (12) and is connected to a scraper (21); the scraper (21) abuts against the second roller (12); the other end of the guide plate (2) is located on a side of the first roller (11) away from the second roller (12); and a guide gap (22) is provided between the guide plate (2) and the first roller (11).

2. An open rubber mixing mill according to claim 1, characterized in that: The scraper (21) is provided with a main air passage (3) and a plurality of branch air passages (31) connected to the main air passage (3). The main air passage (3) is connected to an external air source, and the branch air passages (31) face downwardly of the roller (11).

3. An open rubber mixing mill according to claim 2, characterized in that: A slider (32) is slidably arranged inside the airway (31), a limit key (33) is connected to the side wall of the slider (32), a key slot (34) is arranged on the side wall of the airway (31) for the limit key (33) to be inserted and slide, a bronchial hole (37) is arranged inside the slider (32), one end of the bronchial hole (37) is connected to the airway (31) and the other section extends to the side wall of the slider (32), and the side wall of the airway (31) covers the bronchial hole (37) and extends to one end of the side wall of the slider (32).

4. An open rubber mixing mill according to claim 3, characterized in that: A limiting elastic member (35) for pulling the slider (32) inwards is connected between the main air channel (3) and the slider (32).

5. An open rubber mixing mill according to claim 3, characterized in that: The main air passage (3) is connected to an extension hole (36), and the extension hole (36) extends from one end away from the main air passage (3) to the side wall of the scraper (21) close to the second roller (12).

6. An open rubber mixing mill according to claim 1, characterized in that: A discharge tool (4) is provided at one end of the guide plate (2) away from the scraper (21); the discharge tool (4) is slidably connected to the guide plate (2); and the sliding direction of the discharge tool is arranged parallel to the axial direction of the roller (11).

7. An open rubber mixing mill according to claim 6, characterized in that: The guide plate (2) is provided with a slide groove (23), a slide seat (24) is slidably provided in the slide groove (23), and the unloading tool (4) is connected to the slide seat (24); The unloading tool (4) comprises a unloading rod (41) and a unloading hemisphere (42) which are coaxially arranged, wherein the unloading hemisphere (42) abuts against a roller (11), and the unloading rod (41) is rotatably connected to a slide seat (24), and the slide seat (24) is connected to a driving assembly (5) for realizing the rotation of the unloading rod (41).

8. An open rubber mixing mill according to claim 7, characterized in that: The driving assembly (5) comprises a driving gear (51) and a driving rack (52); the driving rack (52) is arranged on the inner wall of the slide groove (23); the driving gear (51) is coaxially arranged with the discharge rod (41); and the driving gear (51) is meshed with the driving rack (52).

9. An open rubber mixing mill according to claim 7, characterized in that: The side wall of the slide seat (24) is provided with a mounting hole (61), an oil-soaked sponge (6) is arranged in the mounting hole (61), and the oil-soaked sponge (6) abuts against the inner wall of the slide groove (23).

10. An open rubber mixing mill according to claim 9, characterized in that: The mounting hole (61) is provided with an oil filling hole (62) penetrating therethrough, and the oil filling hole (62) is opened upward.

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