Open mill for rubber compound

Abstract

The invention discloses a rubber production open mill which comprises a bottom plate, vertical plates are symmetrically arranged on the bottom plate, a roller is arranged between the two vertical plates, a collecting and discharging assembly matched with the roller is arranged below the bottom plate, and a lifting plate is arranged at one end of the bottom plate through a lifting mechanism. A mounting plate is fixedly arranged on the lifting plate through a supporting column, a pressing mechanism is arranged on the mounting plate, a scraping assembly is arranged at the end, close to the roller, of the lifting plate, a rotating assembly is arranged between the lifting mechanism and the lifting plate, and a pressing assembly matched with the rotating assembly is arranged on the vertical plate. According to the automatic forming device, automatic forming of the triangular package is achieved, full dispersion of all components of a rubber material is ensured, the mixing effect is improved, the rubber material obtained after triangular package forming automatically falls into the space between the two rollers through the synergistic effect of the lifting mechanism, the rotating assembly and the pressing assembly, manual intervention is reduced, operation continuity is improved, and convenience is provided for repeated processing of the rubber material.

Description

Technical Field

[0001] This invention belongs to the technical field of rubber and plastic open mills, specifically, it relates to an open mill for rubber production. Background Technology

[0002] In the field of rubber and plastics processing technology, a wide variety of materials require melt blending treatment using internal mixers and open mills. These include products formed by vulcanization molding or injection molding using novel processes, such as natural rubber, synthetic rubber, and ethylene-vinyl acetate copolymers. After the raw material formulation, prepared according to specific technical requirements, is mixed in an internal mixer, the raw materials, originally in the form of colloids, granules, or powders, are fused and melted to form clumps. However, at this point, the dispersion uniformity between the various compounding materials and the rubber (plastic) is still relatively low, only reaching a basic dispersion level. To ensure sufficient dispersion of the components within the clumps and form sheets or granules that meet the requirements of the next process, industry standards require processes such as thin-passing, triangular packing, sheeting, or granulation on an open mill.

[0003] The process of forming a triangular bale specifically refers to: after the rubber slurry is rolled into a thin sheet by the rollers of an open mill, the sheet is cut along the axis on the roller surface. As the rollers continue to roll and output the sheet, the operator first stacks the left and right corners of the sheet inwards towards the center, forming a triangle with the pointed corners facing outwards; then, the pointed corners of this triangle are stacked inwards to form the outer straight edge; this stacking action is repeated until all the rubber slurry on the machine is stacked into a large triangular bale. To reduce reliance on manual labor, current triangular bale operations often use robotic arms or roller-integrated turning mechanisms to achieve similar stacking functions.

[0004] However, existing technical solutions still have obvious drawbacks: when using industrial robots to simulate the triangular packing operation, the need to accurately simulate complex manual stacking actions results in high equipment costs, complex structures, and limited adaptability to changes in rubber viscosity; when using a turning mechanism (such as a fixed track or baffle to guide the rubber to fold naturally), the working effect depends on the rubber's own fluidity. When processing high-hardness / high-filled rubber (such as rubber containing a large amount of carbon black), the insufficient fluidity of the rubber leads to poor folding effect, making it difficult to meet process requirements. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a rubber production open mill.

[0006] To achieve the aforementioned objectives, the technical solution adopted by this invention includes: a rubber production open mill, comprising a base plate, vertical plates symmetrically arranged on the base plate, a roller arranged between the two vertical plates, a material collection and feeding assembly matching the roller arranged under the base plate, a lifting plate arranged at one end of the base plate via a lifting mechanism, an mounting plate fixedly arranged on the lifting plate via a support column, a pressing mechanism arranged on the mounting plate, a scraping assembly arranged at the end of the lifting plate near the roller, a rotating assembly arranged between the lifting mechanism and the lifting plate, and a pressing assembly matching the rotating assembly arranged on the vertical plate.

[0007] Preferably, in order to facilitate the collection of fallen debris and additives during processing and to reintroduce them into the rubber compound to ensure the proportion and quality of processing, the collection and feeding assembly includes a collection hopper set on the base plate, a collection box set at the bottom of the collection hopper, a discharge pipe set on one side of the collection box, a feeding pipe set at the top of the discharge pipe, the feeding pipe being fixedly connected to the vertical plate, and feeding ports being opened at equal intervals at the bottom of the feeding pipe.

[0008] Preferably, in order to facilitate the up and down movement of the lifting plate, the lifting plate can be rotated in conjunction with the rotating component and the pressing component, so that the rubber material after being wrapped in a triangular shape can be put back into the roller for further processing. The lifting mechanism includes a motor installed under the base plate, and a screw is fixedly installed at the output end of the motor. The screw passes through the base plate and extends to the top. A lifting block is threaded onto the screw, and the lifting block is connected to the lifting plate through the rotating component.

[0009] Preferably, in order to ensure stable movement during lifting and to prevent deviation, the lifting mechanism also includes guide columns symmetrically arranged on the base plate, with guide blocks slidably fitted on the guide columns, and the guide blocks connected to the lifting plate through a rotating assembly.

[0010] Preferably, in order to facilitate the rotation of the lifting plate with the pressing component and the lifting mechanism, the rubber material after being wrapped in a triangular shape can be put back into the roller for further processing. Then, it can be easily rotated and reset during the downward movement without affecting the next use. The rotating component includes a damping shaft that is rotatably set at one end of the lifting plate near the screw. The guide block and the lifting block are both connected to the damping shaft. The two guide blocks have rectangular blocks set on their opposite ends through connecting blocks. The rectangular blocks have cavities inside, and a connecting rod is set in the cavity through a spiral spring. The connecting rod passes through the cavity and is fixedly connected to the damping shaft.

[0011] Preferably, in order to allow the mounting plate and the pressure block to cooperate during the lifting process of the lifting plate and rotate the lifting plate within the rotating assembly, the pressing assembly includes an L-shaped plate fixedly mounted on the vertical plate, and a pressure block fixedly mounted at the end of the L-shaped plate, the pressure block matching the mounting plate.

[0012] Preferably, in order to facilitate the scraping of the adhesive material and the triangular wrapping operation of the pressing mechanism, the scraping component includes a fixed frame symmetrically arranged at one end of the lifting plate near the roller. The fixed frame is equipped with a scraper via an electric push rod, and the scraper matches the roller.

[0013] Preferably, in order to facilitate the folding and stacking of the adhesive material until all the adhesive clumps on the machine are formed into a large triangular bundle, the pressing mechanism includes a liquid storage tube mounted on the mounting plate, a first piston slidably mounted inside the liquid storage tube, a liquid exchange tube mounted on the liquid storage tube, with the two ends of the liquid exchange tube located at the two ends of the first piston respectively, a second piston slidably mounted at the two ends of the liquid storage tube, an extension rod mounted below the second piston, an adjustment plate mounted on the extension rod via a rotating assembly, and pressure plates symmetrically mounted below the adjustment plate.

[0014] Preferably, in order to ensure the sealing effect and not affect the movement adjustment, both the first piston and the second piston are provided with sealing rings on the outside, and the sealing rings are interference fit with the inner wall of the liquid storage tube.

[0015] Preferably, in order to facilitate the rotation of the adjusting plate and the pressure plate, the rotating assembly includes a rotating ball set at the bottom of the extension rod, and a rotating seat is fixedly set on the adjusting plate, with a rotating groove matching the rotating ball inside the rotating seat.

[0016] Compared with the prior art, the advantages of the present invention include: (1) The present invention provides a rubber production open mill, in which the pressing mechanism realizes the automated forming of triangular bales through hydraulic drive. Hydraulic oil is exchanged through a liquid exchange pipe in the storage pipe on the mounting plate, driving the first piston to move, which in turn drives the second pistons at both ends and the extension rod to move. The rotating ball at the bottom of the extension rod is connected to the rotating seat on the adjusting plate, driving the adjusting plate and the pressure plate to press and stack the scraped rubber material. This design realizes the automated forming of triangular bales, ensuring the full dispersion of the various components of the rubber material and improving the mixing effect. (2) The present invention provides a rubber production open mill. The scraping component solves the problem of rubber residue on the roller. The lifting plate is equipped with an electric push rod through a fixed frame at one end of the roller, which drives the scraper to approach the roller and can effectively scrape off the rubber attached to the roller surface. This design avoids rubber residue, ensures the complete utilization of rubber, and provides a uniform rubber base for subsequent pressing and stacking operations, which helps to improve the uniformity of processing. (3) The open mill for rubber production provided by this invention significantly improves the automation level of operation through the coordinated action of the lifting mechanism, rotating components, and pressing components. The motor installed under the bottom plate drives the screw to rotate, and the screw engagement drives the lifting block to move along the screw. With the guidance and limiting of the guide column and guide block, the lifting plate can be stably lifted and lowered. The lifting plate is connected to the lifting block and guide block through the damping shaft. Combined with the connecting rod driven by the spiral spring in the cavity of the rectangular block, during the lifting plate's ascent, the mounting plate and the pressure block installed on the vertical plate contact and press down, driving the lifting plate to rotate in the direction of the rollers, so that the rubber material after triangular packaging automatically falls between the two rollers; when descending, the spiral spring releases potential energy and drives the lifting plate to reset. This design reduces manual intervention, improves the continuity of operation, and provides convenience for the repeated processing of rubber material.

[0017] (4) The open mill for rubber production provided by this invention effectively solves the problem of debris and compounding agents scattering during processing by setting up a material collection and feeding component. Specifically, the collection hopper set on the bottom plate can collect the fallen debris and compounding agents in a centralized manner. The collection box provides a temporary storage function. Then, through the cooperation of the discharge pipe and the feeding pipe, the collected material is added back into the rubber compound through the equally spaced feeding ports. This design avoids material waste, ensures the accuracy of raw material ratio, and provides a basic guarantee for the stability of processing quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an overall schematic diagram of a rubber production open mill according to the present invention; Figure 2 This is a partial structural schematic diagram of a rubber production open mill according to the present invention; Figure 3 This is one of the structural schematic diagrams of the lifting mechanism and the lifting plate in a rubber production open mill according to the present invention; Figure 4 This is a second schematic diagram of the structure between the lifting mechanism and the lifting plate in a rubber production open mill according to the present invention; Figure 5 This is a schematic diagram of the pressing mechanism in a rubber production open mill according to the present invention; Figure 6 This is a partial structural diagram of the rotating component in a rubber production open mill according to the present invention; Figure 7This is a partial structural diagram of the pressing mechanism in a rubber production open mill according to the present invention.

[0020] Figure label: 11. Base plate; 12. Vertical plate; 13. Roller; 14. L-shaped plate; 15. Pressing block; 21. Lifting plate; 22. Support column; 23. Mounting plate; 31. Motor; 32. Screw; 33. Lifting block; 34. Guide column; 35. Guide block; 36. Connecting block; 41. Discharge pipe; 42. Feeding pipe; 43. Feeding port; 44. Collection hopper; 45. Collection box; 51. Liquid changing pipe; 52. Adjusting plate; 53. Liquid storage pipe; 54. Extension rod; 55. Rotating ball; 56. Rotating seat; 57. Pressing plate; 61. Fixing frame; 62. Scraper; 63. Electric push rod; 71. Damping shaft; 72. Connecting rod; 73. Rectangular block; 74. Cavity; 75. Spiral spring; 81. First piston; 82. Second piston; 83. Sealing ring. Detailed Implementation

[0021] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0022] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0024] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0025] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0026] The present invention aims to introduce and explain the structural composition of a rubber production open mill and the matching relationship between the various components. Unless otherwise specified, the dimensions, materials and manufacturing processes of the various components of the rubber production open mill in the present invention can be selected according to specific circumstances, and no special limitations or explanations are made here.

[0027] Furthermore, to provide the public with a better understanding of the present invention, certain specific details are described in detail in the following description of the invention. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0028] Please see Figures 1-7A rubber production open mill includes a base plate 11 with symmetrically arranged vertical plates 12. A roller 13 is positioned between two vertical plates 12. The roller 13 has a surface made of chilled cast iron with a hardness of HRC50-60 or alloy cast iron, exhibiting high wear resistance and a smooth surface with Ra≤0.8μm to prevent rubber material adhesion. Internal channels can be provided for steam or cooling water to control the roller 13 temperature, typically from 50 to 180°C, adapting to the processing requirements of different materials, such as heating for softening or cooling for anti-sticking. For the open mill, it also includes a transmission mechanism. The driving device mainly consists of a motor 31, a reduction gear, transmission gears, and a coupling, which drives the roller 13 to rotate and controls the speed and speed ratio. It also features roller gap adjustment, allowing adjustment of the gap between the two rollers 13 to control the material thickness and shearing intensity. A smaller roller gap results in greater shearing force. This can be achieved manually or electrically, a relatively mature technology that will not be elaborated upon here. It facilitates the open mixing of rubber, allowing it to undergo strong shearing to achieve plasticizing or mixing purposes. A receiving device matching the roller 13 is installed under the base plate 11. The material collection assembly includes a collection hopper 44 mounted on the base plate 11 for collecting fallen debris or additives during processing. A collection box 45 is located at the bottom of the collection hopper 44 for unified collection and storage of the debris or additives. A discharge pipe 41 is located on one side of the collection box 45, which can be connected to a blower such as a blower to expel the collected debris. A discharge pipe 42 is located at the top of the discharge pipe 41 and is fixedly connected to the vertical plate 12. The bottom plate 11 has equidistant feeding ports 43, through which collected debris and compounding agents can be re-added into the processed rubber to ensure processing quality. One end of the bottom plate 11 is equipped with a lifting plate 21 via a lifting mechanism. A mounting plate 23 is fixed on the lifting plate 21 via a support column 22. The mounting plate 23 is equipped with a pressing mechanism. A scraping component is provided at the end of the lifting plate 21 near the roller 13. A rotating component is provided between the lifting mechanism and the lifting plate 21. A pressing component matching the rotating component is provided on the vertical plate 12.

[0029] Please see Figures 1-7A rubber production open mill is designed to re-feed the rubber compound after triangular packaging between two rollers for shearing and extrusion, breaking the original stress distribution of the compound and allowing for more uniform shearing and kneading in different areas. This, in particular, promotes the dispersion of compounding agents in the rubber matrix. The lifting mechanism includes a motor 31 mounted under a base plate 11. A screw 32 is fixedly mounted on the output end of the motor 31 via a coupling. The screw 32 passes through the base plate 11 and extends upwards. The screw 32 and the base plate 11 are rotatably connected via a shaft. A lifting block 33 is threaded onto the screw 32 and connected to a lifting plate 21 via a rotating assembly. The lifting mechanism also includes guide posts 34 symmetrically arranged on the base plate 11, with guide blocks 35 slidably fitted onto them. The guide posts 34 and guide blocks 35 assist in guiding and limiting the movement, ensuring stability and firmness during lifting. The guide blocks 35 are connected to the lifting plate 21 via a rotating assembly, facilitating subsequent lifting and engagement with a pressing assembly. The lifting plate 21 rotates to facilitate the re-entry of the rubber material into the rubber roller and also to facilitate subsequent automatic reset. The rotating assembly includes a damping shaft 71 rotatably mounted on the end of the lifting plate 21 near the screw 32. When no external force is applied, the lifting plate 21 is in a horizontal state. The guide block 35 and the lifting block 33 are both connected to the damping shaft 71. The two guide blocks 35 have rectangular blocks 73 mounted on their opposite ends via connecting blocks 36. The rectangular blocks 73 have cavities 74 inside, and the cavities 74 are used for... The spiral spring 75 is equipped with a connecting rod 72, which facilitates the lifting plate 21 to move upward and cooperate with the pressure block 15 to press down, causing the lifting plate 21 and the damping shaft 71 to rotate. The spiral spring 75 stores potential energy, which facilitates the lifting plate 21 to rotate and reset after moving downward. The connecting rod 72 passes through the cavity 74 and is fixedly connected to the damping shaft 71. The pressing component includes an L-shaped plate 14 fixedly mounted on the vertical plate 12. A pressure block 15 is fixedly mounted at the end of the L-shaped plate 14, and the pressure block 15 matches the mounting plate 23.

[0030] Please see Figures 1-7 A rubber production open mill, in order to facilitate the removal of rubber material adhering to roller 13 after shearing and extrusion from roller 13, and then fold it into a triangle for easy re-feeding into roller 13 for further extrusion and shearing, includes a scraping assembly comprising a fixed frame 61 symmetrically arranged on a lifting plate 21 near one end of roller 13. The fixed frame 61 is equipped with scrapers 62 via an electric push rod 63. The scrapers 62 are matched to roller 13, and there are two sets of scrapers 62. The clamping mechanism includes a liquid storage pipe 53 mounted on a mounting plate 23. The liquid in the liquid storage pipe 53 can be hydraulic oil, and the shape of the liquid storage pipe 53 is as follows: Figure 4As shown, a first piston 81 is slidably installed in the horizontal section of the reservoir pipe 53. A fluid exchange pipe 51 is installed on the reservoir pipe 53, with its two ends located at the two ends of the first piston 81. The fluid exchange pipe 51 can extract and exchange the hydraulic oil in the two ends of the first piston 81. A second piston 82 is slidably installed at both ends of the vertical section of the reservoir pipe 53. An extension rod 54 is installed below the second piston 82. An adjustment plate 52 is installed on the extension rod 54 through a rotating assembly. A pressure plate 57 is symmetrically installed below the adjustment plate 52. A sealing ring 83 is installed on the outside of both the first piston 81 and the second piston 82. The sealing ring 83 is press-fitted with the inner wall of the reservoir pipe 53 to ensure a sealing effect. The rotating assembly includes a rotating ball 55 installed at the bottom of the extension rod 54. A rotating seat 56 is fixedly installed on the adjustment plate 52. A rotating groove matching the rotating ball 55 is opened in the rotating seat 56.

[0031] Working principle: The rubber compound to be processed is added between two rollers 13. The rollers 13 work to shear and compress the rubber compound. Then, various compounding agents are added evenly along the axis of the rollers 13 according to the feeding sequence to complete the processing of the rubber compound. During processing, methods such as triangular wrapping are needed to ensure the rubber is evenly and continuously coated on the front roller. At this time, the electric push rod 63 on one end of the fixed frame 61 extends, moving the scraper 62 closer to the roller 13 to scrape off the rubber compound adhering to the roller 13. Under the action of gravity, it moves downwards. Simultaneously, through the operation of the liquid exchange pipe 51, one end of the liquid storage pipe 53 (hereinafter referred to as left) can be... The hydraulic oil in the reservoir 53 is drawn from one end to the other (hereinafter referred to as the right end). The first piston 81 moves to the left end, while the second piston 82 on the left end moves downward and the second piston 82 on the right end moves upward. This, in conjunction with the rotating ball 55 and the rotating seat 56, causes the adjusting plate 52 to rotate. The pressure plate 57 on the left end moves downward, which can press the scraped rubber material. Then, the electric push rod 63 on the right end extends, and the electric push rod on the left end retracts and resets. At the same time, the fluid exchange pipe 51 works, drawing the hydraulic oil in the right end of the reservoir pipe 53 to the left end. At this time, the adjusting plate 52 rotates in the opposite direction and presses down in the direction of extension of the electric push rod 63 on the right end, which can press the rubber material again. The scraped adhesive is pressed together, and the above operation is repeated to complete the triangular wrapping. Meanwhile, the electric push rod 63 retracts and resets, the motor 31 rotates forward, causing the screw 32 to rotate. In conjunction with the guide post 34 and guide block 35, the lifting block 33 moves on the screw 32, moving the lifting plate 21 upwards. As it continues to move upwards, the top of the mounting plate 23, near the roller 13, contacts the pressure block 15. This upward movement generates a downward squeezing force on the mounting plate 23, which, in turn, in conjunction with the damping shaft 71, causes the lifting plate 21 to rotate and tilt. The connecting rod 72 rotates accordingly, and the spiral spring 75 stores potential energy, causing the lifting plate 21 to tilt towards the roller. At this point, the rubber material can fall back into the two rollers 13 for further processing. Then, the motor 31 rotates in the opposite direction, moving the entire assembly downwards to reset. At this time, the mounting plate 23 does not contact the pressure block 15. Under the action of the potential energy of the spiral spring 75, the lifting plate 21 rotates and resets, facilitating the next feeding. During the processing, the collecting hopper 44 on the bottom plate 11 can collect the debris and additives generated during the processing. These are temporarily stored in the collecting box 45 and then discharged through the discharge pipe 41 and the discharge port 43 under the discharge pipe 42, where they are remixed with the rubber material to ensure the processing ratio and guarantee the processing quality.

[0032] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A rubber production open mill, comprising a base plate (11), vertical plates (12) symmetrically arranged on the base plate (11), and a roller (13) arranged between the two vertical plates (12), characterized in that: The bottom plate (11) is provided with a material collection and feeding assembly that matches the roller (13). One end of the bottom plate (11) is provided with a lifting plate (21) through a lifting mechanism. The lifting plate (21) is fixed with a mounting plate (23) through a support column (22). The mounting plate (23) is provided with a pressing mechanism. The end of the lifting plate (21) near the roller (13) is provided with a scraping assembly. A rotating assembly is provided between the lifting mechanism and the lifting plate (21). The vertical plate (12) is provided with a pressing assembly that matches the rotating assembly.

2. The open mill for rubber production according to claim 1, characterized in that: The collection and feeding assembly includes a collection hopper (44) set on the base plate (11), a collection box (45) set at the bottom of the collection hopper (44), a discharge pipe (41) set on one side of the collection box (45), a feeding pipe (42) set at the top of the discharge pipe (41), the feeding pipe (42) is fixedly connected to the vertical plate (12), and feeding ports (43) are opened at equal intervals below the feeding pipe (42).

3. A rubber production open mill according to claim 1 or 2, characterized in that: The lifting mechanism includes a motor (31) installed under the base plate (11), and a screw (32) is fixedly installed at the output end of the motor (31). The screw (32) passes through the base plate (11) and extends upward. A lifting block (33) is threaded onto the screw (32), and the lifting block (33) is connected to the lifting plate (21) through a rotating assembly.

4. The open mill for rubber production according to claim 3, characterized in that: The lifting mechanism also includes guide columns (34) symmetrically arranged on the base plate (11), and guide blocks (35) are slidably fitted on the guide columns (34). The guide blocks (35) are connected to the lifting plate (21) through a rotating assembly.

5. A rubber production open mill according to claim 4, characterized in that: The rotating assembly includes a damping shaft (71) rotatably mounted on the lifting plate (21) near the screw (32). The guide block (35) and the lifting block (33) are both connected to the damping shaft (71). The two guide blocks (35) are provided with rectangular blocks (73) on their opposite ends via connecting blocks (36). A cavity (74) is provided inside the rectangular block (73). A connecting rod (72) is provided inside the cavity (74) via a spiral spring (75). The connecting rod (72) passes through the cavity (74) and is fixedly connected to the damping shaft (71).

6. The open mill for rubber production according to claim 5, characterized in that: The pressing assembly includes an L-shaped plate (14) fixedly mounted on a vertical plate (12), and a pressure block (15) fixedly mounted at the end of the L-shaped plate (14), the pressure block (15) matching the mounting plate (23).

7. A rubber production open mill according to claim 6, characterized in that: The scraping assembly includes a fixed frame (61) symmetrically arranged on the lifting plate (21) near one end of the roller (13). The fixed frame (61) is equipped with a scraper (62) via an electric push rod (63). The scraper (62) is matched with the roller (13).

8. A rubber production open mill according to claim 7, characterized in that: The clamping mechanism includes a liquid storage tube (53) mounted on the mounting plate (23), a first piston (81) slidably mounted inside the liquid storage tube (53), a liquid exchange tube (51) mounted on the liquid storage tube (53), the two ends of the liquid exchange tube (51) being located at the two ends of the first piston (81) respectively, a second piston (82) slidably mounted at the two ends of the liquid storage tube (53), an extension rod (54) mounted below the second piston (82), an adjustment plate (52) mounted on the extension rod (54) via a rotating assembly, and pressure plates (57) symmetrically mounted below the adjustment plate (52).

9. A rubber production open mill according to claim 8, characterized in that: Both the first piston (81) and the second piston (82) are provided with sealing rings (83) on their exteriors, and the sealing rings (83) are interference-fitted with the inner wall of the liquid storage tube (53).

10. A rubber production open mill according to claim 9, characterized in that: The rotating assembly includes a rotating ball (55) disposed at the bottom end of the extension rod (54), and a rotating seat (56) fixedly disposed on the adjusting plate (52). The rotating seat (56) has a rotating groove that matches the rotating ball (55).

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