Mixing mill and mixing process for processing rubber sole compound of flame-retardant and high-temperature resistant safety shoes

Abstract

The present invention relates to the technical field related to the processing and rubber mixing process of rubber soles, and discloses a rubber mixing machine and a rubber mixing process for processing the rubber compound of the rubber soles of flame-retardant and high-temperature-resistant safety shoes. By adopting a semi-closed rubber mixing tank, when the two rubber mixing rollers rotate, the flattened rubber can be automatically moved to the upper part for the next round of rolling, without manual feeding. At the same time, in cooperation with the two rubber scraping plates in the rubber mixing tank, the two rubber scraping plates can be driven by a motor to drive the screw rod to move reciprocally, continuously gathering and turning the rubber towards the center, eliminating the trouble of manual turning, realizing automatic rubber mixing, and greatly improving the efficiency of rubber mixing.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber sole processing and rubber mixing processes, specifically to a rubber mixing machine and a rubber mixing process for processing the rubber compound of a flame-retardant and high-temperature-resistant safety shoe rubber sole. Background Art

[0002] The processing process of rubber soles includes multiple steps, among which rubber mixing is a key link. The rubber mixing machine plays an important role in the production of rubber products, mainly used for extruding and sheeting the mixed rubber, and uniformly mixing various compounding agents and vulcanizing agents.

[0003] In the mixing process of traditional rubber mixing processes, an open rubber mixing machine is required, but the traditional open rubber mixing machine can only operate semi-automatically, and workers are still required to manually feed continuously and cut and turn over the rubber to facilitate rapid and uniform mixing of the rubber. Such operation is not only time-consuming and laborious, but also has low efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a rubber mixing machine and a rubber mixing process for processing the rubber compound of a flame-retardant and high-temperature-resistant safety shoe rubber sole, so as to solve the problems of time-consuming, laborious and low efficiency of the current traditional open rubber mixing machine proposed in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A rubber mixing machine and a rubber mixing process for processing the rubber compound of a flame-retardant and high-temperature-resistant safety shoe rubber sole, including a rubber mixing tank, in which a first rubber mixing roll and a second rubber mixing roll are rotatably connected. The first rubber mixing roll and the second rubber mixing roll are parallel to each other. A driving motor is arranged at one end of the rubber mixing tank, and the first rubber mixing roll and the second rubber mixing roll rotate in opposite directions;

[0006] A first lifting frame is fixedly connected to one end of the rubber mixing tank. A first lifting block is arranged in the first lifting frame, and the first lifting block slides up and down in the first lifting frame. The top end of the first lifting frame is fixedly connected with a first hydraulic cylinder, and the output end of the first hydraulic cylinder is fixedly connected with the first lifting block. A second lifting frame is fixedly connected to the other end of the rubber mixing tank. A second lifting block is arranged in the second lifting frame, and the second lifting block slides up and down in the second lifting frame. The top end of the second lifting frame is fixedly connected with a second hydraulic cylinder, and the output end of the second hydraulic cylinder is fixedly connected with the second lifting block;

[0007] A linear guide rail and a lead screw are fixedly connected between the first lifting block and the second lifting block. A first slider is movably connected to the linear guide rail and the lead screw. The first slider is slidably connected to the linear guide rail, and the first slider is drivingly connected to the lead screw through a lead screw nut. A first rubber scraping plate is arranged outside the first rubber mixing roll and the second rubber mixing roll. A first magnetic connection block is fixedly connected to the first rubber scraping plate through a bolt. The first magnetic connection block is mutually engaged with the first slider. A second slider is also movably connected to the linear guide rail and the lead screw. The second slider is slidably connected to the linear guide rail, and the second slider is drivingly connected to the lead screw through a lead screw nut. A second rubber scraping plate is further arranged outside the first rubber mixing roll and the second rubber mixing roll. A second magnetic connection block is fixedly connected to the second rubber scraping plate through a bolt. The second magnetic connection block is mutually engaged with the second slider;

[0008] A central positioning block is arranged between the first slider and the second slider. The central positioning block is slidably connected to the linear guide rail and the lead screw. A fixing plate is fixedly connected below the central positioning block. A cutting edge is fixedly connected below the fixing plate. Rubber scraping plates are movably connected to both sides of the fixing plate.

[0009] The present invention provides another technical solution: a rubber mixing process for processing the rubber sole of a flame-retardant and high-temperature-resistant safety shoe, including the following steps:

[0010] S1. Raw material preparation: Prepare the required raw rubber, compounding agents, and fillers. The raw rubber includes nitrile rubber and natural rubber. The compounding agents include accelerators, sulfur, anti-aging agents, paraffin wax, stearic acid, and zinc oxide. The fillers include carbon black, calcium carbonate, and silica;

[0011] S2. Plasticating: Put the block-shaped raw rubber into a rubber mixing machine to reduce the Mooney viscosity of the rubber compound. During plasticating, the roller temperature is at room temperature, the roller gap is 0.5 mm, and the plasticating time is 3 h;

[0012] S3. Mixing: The plasticated raw rubber and various compounding agents and fillers are put into a rubber mixing machine for mixing. Slow-speed internal mixing is adopted, and the raw rubber is added in batches;

[0013] S4. Sheet pressing: After mixing is completed, the rubber compound is pressed into sheets through a sheet press to form uniform sheets;

[0014] S5. Conditioning: The sheets after sheet pressing need to be conditioned for more than 24 hours to ensure the uniformity and stability of the rubber compound;

[0015] S6. Molding: The conditioned and cooled sheets are molded through a molding device to form the required sole shape;

[0016] S7. Vulcanization: The molded soles need to be vulcanized to improve their physical properties and high-temperature resistance;

[0017] S8. Trimming: The vulcanized sole needs to be trimmed to remove excess corners and edges to ensure a smooth surface without burrs.

[0018] Furthermore, the output shaft of the drive motor is fixedly connected with a driving pulley. The driving pulley is connected with a driven pulley through a belt. One side of the driven pulley is fixedly connected with a worm. The worm meshes with a worm gear. The worm gear is fixedly connected with a driving gear. The driving gear is fixedly connected to one end of the second rubber mixing roll. One end of the first rubber mixing roll is fixedly connected with a driven gear. The driven gear meshes with the driving gear.

[0019] Furthermore, the thread on the lead screw is divided into two sections, and the two sections have opposite thread directions. The first slider is in threaded transmission connection with one section of the lead screw, and the second slider is in threaded transmission connection with the other section of the lead screw.

[0020] Furthermore, the two sections of the thread on the lead screw are connected by a smooth rod. The central positioning block is slidably connected to the smooth rod at the center of the lead screw. The central positioning block is slidably connected to the linear guide rail.

[0021] Furthermore, two groups of first slots are opened in the first slider. First magnets are embedded in the first slots. Two groups of second slots are opened in the first magnetic connection block. Movable pins are inserted into the second slots. The upper ends of the movable pins are fixedly connected with second magnets. The first magnets and the second magnets attract each other. The second slider has the same structure as the first slider, and the second magnetic connection block has the same structure as the first magnetic connection block.

[0022] Furthermore, when the first lifting block and the second lifting block move to the lowermost end, the lower end surfaces of the first slider and the second slider are respectively flush with the upper end surfaces of the first magnetic connection block and the second magnetic connection block.

[0023] Furthermore, the rubber squeegee is arc-shaped and bent, and there are two groups of rubber squeegees. The two groups of rubber squeegees are fixedly connected by a connecting plate. A lifting rod is fixedly connected above the connecting plate. The lifting rod penetrates through the fixing plate. The upper end of the lifting rod is fixedly connected with a spring block. A pressure spring is sleeved outside the lifting rod. The pressure spring is located between the spring block and the fixing plate.

[0024] Furthermore, the inner sides of the first rubber scraping plate and the second rubber scraping plate are in contact with the outer surfaces of the first rubber mixing roll and the second rubber mixing roll, and the outer sides of the first rubber scraping plate and the second rubber scraping plate are in contact with the inner wall of the rubber mixing tank.

[0025] Furthermore, the widths of the first rubber scraping plate and the second rubber scraping plate are smaller than the length of the smooth rod part at the center of the lead screw.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] The rubber sole compound processing rubber mixing mill and rubber mixing process of the flame-retardant and high-temperature resistant safety shoes of the present invention adopt a semi-closed rubber mixing tank, so that when the two rubber mixing rollers rotate, the flattened rubber can be automatically moved above for the next round of rolling, eliminating the need for manual feeding. At the same time, in cooperation with the two rubber scraping plates in the rubber mixing tank, the two rubber scraping plates can be driven by a motor-driven lead screw to move reciprocally, continuously gathering and turning the rubber towards the center, eliminating the trouble of manual turning, realizing automatic rubber mixing, and greatly improving the efficiency of rubber mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the rubber mixing tank of the present invention;

[0029] Figure 2 It is a schematic structural diagram of the first rubber mixing roller and the second rubber mixing roller of the present invention;

[0030] Figure 3 For the present invention Figure 2 The enlarged structural diagram at position A in;

[0031] Figure 4 It is a schematic cross-sectional structure diagram of the rubber mixing tank of the present invention;

[0032] Figure 5 It is a schematic structural diagram of the rubber scraping plate of the present invention;

[0033] Figure 6 It is a schematic structural diagram of the center positioning block of the present invention;

[0034] Figure 7 It is a schematic structural diagram of the first magnetic connection block of the present invention.

[0035] Reference numerals in the figures: 1, rubber mixing tank; 2, first rubber mixing roller; 3, second rubber mixing roller; 4, drive motor; 5, driving pulley; 6, driven pulley; 7, worm; 8, worm gear; 9, driving gear; 10, driven gear; 11, first lifting frame; 12, first lifting block; 13, first hydraulic cylinder; 14, second lifting frame; 15, second lifting block; 16, second hydraulic cylinder; 17, linear guide rail; 18, lead screw; 19, servo motor; 20, first slider; 2001, first slot; 2002, first magnet; 21, first rubber scraping plate; 22, first magnetic connection block; 2201, second slot; 2202, movable pin; 2203, second magnet; 23, second slider; 24, second rubber scraping plate; 25, second magnetic connection block; 26, center positioning block; 27, fixing plate; 28, cutting edge; 29, rubber scraping plate; 2901, connecting plate; 2902, lifting rod; 2903, spring stop; 2904, pressure spring. DETAILED DESCRIPTION OF THE INVENTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] To further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings.

[0038] Combined with Figure 1 - Figure 7 A rubber mixing mill for processing the rubber sole compound of a flame-retardant and high-temperature-resistant safety shoe, comprising a mixing tank 1. A first mixing roller 2 and a second mixing roller 3 are rotatably connected in the mixing tank 1. The first mixing roller 2 and the second mixing roller 3 are parallel to each other. A driving motor 4 is arranged at one end of the mixing tank 1. The output shaft of the driving motor 4 is fixedly connected with a driving belt pulley 5. The driving belt pulley 5 is connected with a driven belt pulley 6 through a belt. A worm 7 is fixedly connected to one side of the driven belt pulley 6. The worm 7 meshes with a worm gear 8. The worm gear 8 is fixedly connected with a driving gear 9. The driving gear 9 is fixedly connected to one end of the second mixing roller 3. A driven gear 10 is fixedly connected to one end of the first mixing roller 2. The driven gear 10 meshes with the driving gear 9. The driving motor 4 drives the first mixing roller 2 and the second mixing roller 3 to rotate in opposite directions simultaneously through belt pulley transmission, worm and worm gear transmission and gear transmission to roll and mix the rubber.

[0039] A first lifting frame 11 is fixedly connected to one end of the mixing tank 1. A first lifting block 12 is arranged in the first lifting frame 11. The first lifting block 12 slides up and down in the first lifting frame 11. The top end of the first lifting frame 11 is fixedly connected with a first hydraulic cylinder 13. The output end of the first hydraulic cylinder 13 is fixedly connected with the first lifting block 12. A second lifting frame 14 is fixedly connected to the other end of the mixing tank 1. A second lifting block 15 is arranged in the second lifting frame 14. The second lifting block 15 slides up and down in the second lifting frame 14. The top end of the second lifting frame 14 is fixedly connected with a second hydraulic cylinder 16. The output end of the second hydraulic cylinder 16 is fixedly connected with the second lifting block 15;

[0040] A linear guide 17 and a screw rod 18 are fixedly connected between the first lifting block 12 and the second lifting block 15, and a first slider 20 is movably connected to the linear guide 17 and the screw rod 18. The first slider 20 is slidably connected to the linear guide 17, and the first slider 20 is transmission-connected to the screw rod 18 through a screw nut. A first scraper plate 21 is arranged outside the first rubber mixing roller 2 and the second rubber mixing roller 3, and a first magnetic connection block 22 is fixedly connected to the first scraper plate 21 through bolts, and the first magnetic connection block 22 and the first slider 20 are mutually engaged. A second slider 23 is also movably connected to the linear guide 17 and the screw rod 18, and the second slider 23 is slidably connected to the linear guide 17, and the second slider 23 is transmission-connected to the screw rod 18 through a screw nut. A second scraper plate 24 is also arranged outside the first rubber mixing roller 2 and the second rubber mixing roller 3, and a second magnetic connection block 25 is fixedly connected to the second scraper plate 24 through bolts.

[0041] The thread on the screw rod 18 is divided into two sections, and the two sections have opposite directions. The first slider 20 is connected to one section of the thread of the screw rod 18, and the second slider 23 is connected to the other section of the thread of the screw rod 18. In this way, when the screw rod 18 rotates, it can simultaneously drive the first slider 20 and the second slider 23 to move toward or in opposite directions.

[0042] Two groups of first slots 2001 are provided in the first slider 20. First magnets 2002 are embedded in the first slots 2001. Two groups of second slots 2201 are provided in the first magnetic connection block 22. Movable pins 2202 are inserted into the second slots 2201. Second magnets 2203 are fixedly connected to the upper ends of the movable pins 2202. The first magnets 2002 and the second magnets 2203 attract each other. The second slider 23 has the same structure as the first slider 20, and the second magnetic connection block 25 has the same structure as the first magnetic connection block 22. When the first lifting block 12 and the second lifting block 15 move to the lowermost end, the lower end surfaces of the first slider 20 and the second slider 23 are respectively flush with the upper end surfaces of the first magnetic connection block 22 and the second magnetic connection block 25. Thus, when the first lifting block 12 and the second lifting block 15 move to the lowermost end, the servo motor 19 drives the lead screw 18 to rotate reciprocally, thereby driving the first slider 20 and the second slider 23 to continuously move left and right. When the first slider 20 coincides with the first magnetic connection block 22, the first magnets 2002 in the first slider 20 will attract the second magnets 2203 in the first magnetic connection block 22, so that the movable pins 2202 are inserted into the first slots 2001, making the first slider 20 and the first magnetic connection block 22 fixed together. In this way, the first slider 20 can drive the first rubber scraping plate 21 to continuously move reciprocally through the first magnetic connection block 22. Similarly, the second slider 23 will also drive the second rubber scraping plate 24 to continuously move reciprocally. The inner sides of the first rubber scraping plate 21 and the second rubber scraping plate 24 are in contact with the outer surfaces of the first rubber mixing roller 2 and the second rubber mixing roller 3, and the outer sides of the first rubber scraping plate 21 and the second rubber scraping plate 24 are in contact with the inner wall of the rubber mixing tank 1. Thus, the continuous reciprocating movement of the first rubber scraping plate 21 and the second rubber scraping plate 24 can continuously gather the rubber towards the middle.

[0043] Specifically, the thread on the lead screw 18 is divided into two sections, and the directions of the two sections of the thread are opposite. The first slider 20 is in threaded driving connection with one section of the lead screw 18, and the second slider 23 is in threaded driving connection with the other section of the lead screw 18. In this way, when the lead screw 18 rotates, it can simultaneously drive the first slider 20 and the second slider 23 to move towards each other or in opposite directions, and further can periodically drive the first rubber scraping plate 21 and the second rubber scraping plate 24 to scrape the rubber to the middle.

[0044] A central positioning block 26 is arranged between the first slider 20 and the second slider 23. The two sections of threads on the lead screw 18 are connected by a smooth rod. The central positioning block 26 is slidably connected to the smooth rod at the center of the lead screw 18 and is also slidably connected to the linear guide rail 17. Therefore, when the lead screw 18 rotates, it will not drive the central positioning block 26 to move. A fixed plate 27 is fixedly connected below the central positioning block 26, and a cutting edge 28 is fixedly connected below the fixed plate 27. Rubber scraping plates 29 are movably connected to both sides of the fixed plate 27. The rubber scraping plates 29 are arc-shaped and there are two groups of rubber scraping plates 29. The two groups of rubber scraping plates 29 are fixedly connected by a connecting plate 2901. An elevating rod 2902 is fixedly connected above the connecting plate 2901. The elevating rod 2902 passes through the fixed plate 27. A spring stop block 2903 is fixedly connected to the upper end of the elevating rod 2902. A compression spring 2904 is sleeved outside the elevating rod 2902. The compression spring 2904 is located between the spring stop block 2903 and the fixed plate 27. The widths of the first rubber scraping plate 21 and the second rubber scraping plate 24 are smaller than the length of the smooth rod part at the center of the lead screw 18.

[0045] Working principle: When carrying out the plasticizing and mixing of rubber, first put the rubber into the rubber mixing tank 1 and place it between the first rubber mixing roller 2 and the second rubber mixing roller 3. When the first rubber mixing roller 2 and the second rubber mixing roller 3 rotate, they will roll the rubber. After rolling, the rubber spreads to both ends of the first rubber mixing roller 2 and the second rubber mixing roller 3 and falls below the first rubber mixing roller 2 and the second rubber mixing roller 3. Then, when the first rubber mixing roller 2 and the second rubber mixing roller 3 continue to rotate, they will transport the rubber below the first rubber mixing roller 2 and the second rubber mixing roller 3 back above the first rubber mixing roller 2 and the second rubber mixing roller 3 to repeat the rolling. At the same time, the first hydraulic cylinder 13 and the second hydraulic cylinder 16 push the first lifting block 12 and the second lifting block 15 downward, making the cutting edge 28 close to the first rubber mixing roller 2 and the second rubber mixing roller 3, so as to cut the rubber sheet and facilitate accelerating the mixing.

[0046] When the first lifting block 12 and the second lifting block 15 move to the lowermost end, the servo motor 19 drives the screw rod 18 to rotate back and forth, thereby driving the first slider 20 and the second slider 23 to move left and right continuously. When the first slider 20 overlaps with the first magnetic connection block 22, the first magnet 2002 in the first slider 20 will attract the second magnet 2203 in the first magnetic connection block 22, so that the movable pin 2202 is inserted into the first slot 2001, so that the first slider 20 and the first magnetic connection block 22 are fixed together. In this way, the first slider 20 can drive the first scraper plate 21 to move back and forth continuously through the first magnetic connection block 22. Similarly, the second slider 23 will also drive the second scraper plate 24 to move back and forth continuously. The inner sides of the first scraper plate 21 and the second scraper plate 24 are in contact with the outer surfaces of the first rubber mixing roller 2 and the second rubber mixing roller 3, and the outer sides of the first scraper plate 21 and the second scraper plate 24 are in contact with the inner wall of the rubber mixing tank 1, so that the first scraper plate 21 and the second scraper plate 24 continuously move back and forth to continuously gather the rubber to the middle, turn the rubber over, and speed up the mixing speed.

[0047] The rubber refining process for processing the rubber compound of the flame retardant and high temperature resistant safety shoes rubber soles comprises the following steps:

[0048] S1. Raw material preparation: prepare the required raw rubber, compounding agents and fillers. The raw rubber includes nitrile rubber and natural rubber. The compounding agents include accelerators, sulfur, antioxidants, paraffin, stearic acid and zinc oxide. The fillers include carbon black, calcium carbonate and white carbon black.

[0049] S2. Plastication: Put the block of raw rubber into the rubber mixer to reduce the Mooney viscosity of the rubber. The roller temperature during plastication is room temperature, the roller distance is 0.5mm, and the plastication time is 3h;

[0050] S3. Mixing: The plasticized raw rubber is put into a rubber mixer together with various compounding agents and fillers for mixing, using slow internal mixing and adding raw rubber in batches;

[0051] S4. Tableting: After the mixing is completed, the rubber material is pressed through a tablet press to form a uniform film;

[0052] S5. Parking: The film after pressing needs to be parked for a certain period of time to ensure the uniformity and stability of the rubber material. The parking time is more than 24 hours;

[0053] S6. Molding: The cooled rubber sheet is molded by a molding device to form the desired sole shape;

[0054] S7. Vulcanization: The molded sole needs to be vulcanized to improve its physical properties and high temperature resistance;

[0055] S8.Finishing: The vulcanized sole needs to be trimmed to remove excess edges and corners to ensure a smooth surface without burrs.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rubber mixing machine for processing rubber compound for flame retardant and high temperature resistant safety shoes rubber soles, comprising a rubber mixing tank (1), characterized in that: A first rubber mixing roller (2) and a second rubber mixing roller (3) are rotatably connected in the rubber mixing tank (1); the first rubber mixing roller (2) and the second rubber mixing roller (3) are parallel to each other; a driving motor (4) is provided at one end of the rubber mixing tank (1); and the first rubber mixing roller (2) and the second rubber mixing roller (3) rotate in opposite directions; One end of the rubber mixing tank (1) is fixedly connected to a first lifting frame (11), a first lifting block (12) is arranged in the first lifting frame (11), the first lifting block (12) slides up and down in the first lifting frame (11), a first hydraulic cylinder (13) is fixedly connected to the top of the first lifting frame (11), the output end of the first hydraulic cylinder (13) is fixedly connected to the first lifting block (12), the other end of the rubber mixing tank (1) is fixedly connected to a second lifting frame (14), a second lifting block (15) is arranged in the second lifting frame (14), the second lifting block (15) slides up and down in the second lifting frame (14), a second hydraulic cylinder (16) is fixedly connected to the top of the second lifting frame (14), the output end of the second hydraulic cylinder (16) is fixedly connected to the second lifting block (15); A linear guide rail (17) and a lead screw (18) are fixedly connected between the first lifting block (12) and the second lifting block (15); a first slider (20) is movably connected to the linear guide rail (17) and the lead screw (18); the first slider (20) is slidably connected to the linear guide rail (17); the first slider (20) is transmission-connected to the lead screw (18) via a lead screw nut; a first scraper plate (21) is disposed outside the first rubber mixing roller (2) and the second rubber mixing roller (3); a first magnetic connection block (22) is fixedly connected to the first scraper plate (21) via bolts; the first magnetic connection block (22) is movably connected to the linear guide rail (17) and the lead screw (18); the first slider (20) is transmission-connected to the lead screw (18) via a lead screw nut; The force connection block (22) and the first slider (20) are interlocked with each other, and the linear guide rail (17) and the screw rod (18) are also movably connected with a second slider (23), and the second slider (23) is slidably connected to the linear guide rail (17), and the second slider (23) is transmission-connected to the screw rod (18) through a screw nut, and the first rubber mixing roller (2) and the second rubber mixing roller (3) are also provided with a second scraper plate (24), and the second scraper plate (24) is fixedly connected with a second magnetic connection block (25) through bolts, and the second magnetic connection block (25) and the second slider (23) are interlocked with each other; A center positioning block (26) is provided between the first sliding block (20) and the second sliding block (23); the center positioning block (26) is slidably connected to the linear guide rail (17) and the screw rod (18); a fixing plate (27) is fixedly connected below the center positioning block (26); a cutting blade (28) is fixedly connected below the fixing plate (27); and rubber scrapers (29) are movably connected to both sides of the fixing plate (27).

2. The rubber mixing machine for processing the rubber compound of the flame retardant and high temperature resistant safety shoes rubber sole according to claim 1, characterized in that: The output shaft of the driving motor (4) is fixedly connected to a driving pulley (5), the driving pulley (5) is connected to a driven pulley (6) via a belt transmission, one side of the driven pulley (6) is fixedly connected to a worm (7), the worm (7) is meshed with a worm wheel (8), the worm wheel (8) is fixedly connected to a driving gear (9), the driving gear (9) is fixedly connected to one end of the second rubber mixing roller (3), the first rubber mixing roller (2) is fixedly connected to one end of a driven gear (10), the driven gear (10) and the driving gear (9) are meshed with each other.

3. The rubber mixing machine for processing the rubber compound of the flame retardant and high temperature resistant safety shoes rubber sole according to claim 1, characterized in that: The thread on the screw rod (18) is divided into two sections, and the two sections have opposite thread directions; the first slider (20) is drivingly connected to one section of the thread of the screw rod (18), and the second slider (23) is drivingly connected to the other section of the thread of the screw rod (18).

4. The rubber mixing machine for processing the rubber compound of the flame retardant and high temperature resistant safety shoes rubber sole according to claim 3, characterized in that: The two sections of thread on the screw rod (18) are connected via a polished rod, the center positioning block (26) is slidably connected to the polished rod at the center of the screw rod (18), and the center positioning block (26) is slidably connected to the linear guide rail (17).

5. The rubber mixing machine for processing the rubber compound of the flame retardant and high temperature resistant safety shoes rubber sole according to claim 1, characterized in that: The first slider (20) is provided with two groups of first slots (2001), the first slots (2001) are embedded with first magnets (2002), the first magnetic connection block (22) is provided with two groups of second slots (2201), movable latches (2202) are inserted into the second slots (2201), the upper end of the movable latches (2202) is fixedly connected with a second magnet (2203), the first magnet (2002) and the second magnet (2203) attract each other, the second slider (23) has the same structure as the first slider (20), and the second magnetic connection block (25) has the same structure as the first magnetic connection block (22).

6. The rubber mixing machine for processing the rubber compound of the flame retardant and high temperature resistant safety shoes rubber sole according to claim 1, characterized in that: When the first lifting block (12) and the second lifting block (15) move to the lowest end, the lower end surfaces of the first sliding block (20) and the second sliding block (23) are respectively at the same height as the upper end surfaces of the first magnetic connection block (22) and the second magnetic connection block (25).

7. The rubber mixing machine for processing the rubber compound of the flame retardant and high temperature resistant safety shoes rubber sole according to claim 1, characterized in that: The rubber scraper (29) is curved in an arc shape, and two groups of the rubber scraper (29) are provided. The two groups of rubber scrapers (29) are fixedly connected via a connecting plate (2901). A lifting rod (2902) is fixedly connected above the connecting plate (2901). The lifting rod (2902) passes through the fixed plate (27). A spring stopper (2903) is fixedly connected to the upper end of the lifting rod (2902). A pressure spring (2904) is provided on the outer sleeve of the lifting rod (2902). The pressure spring (2904) is located between the spring stopper (2903) and the fixed plate (27).

8. The rubber mixing machine for processing the rubber compound of the flame retardant and high temperature resistant safety shoes rubber soles according to claim 1, characterized in that: The inner sides of the first rubber scraper (21) and the second rubber scraper (24) are in contact with the outer surfaces of the first rubber mixing roller (2) and the second rubber mixing roller (3), and the outer sides of the first rubber scraper (21) and the second rubber scraper (24) are in contact with the inner wall of the rubber mixing tank (1).

9. The rubber mixing machine for processing the rubber compound of the flame retardant and high temperature resistant safety shoes rubber sole according to claim 4, characterized in that: The width of the first scraper plate (21) and the second scraper plate (24) is smaller than the length of the polished rod portion at the center of the screw rod (18).

10. The rubber refining process for processing the rubber compound for the rubber sole of flame retardant and high temperature resistant safety shoes according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Raw material preparation: prepare the required raw rubber, compounding agent and filler, the raw rubber includes nitrile rubber and natural rubber, the compounding agent includes accelerator, sulfur, antioxidant, paraffin, stearic acid and zinc oxide, the filler includes carbon black, calcium carbonate and white carbon black; S2. Plastication: Put the raw rubber into the rubber mixer to reduce the Mooney viscosity of the rubber. The roller temperature is room temperature during plastication, the roller distance is 0.5mm, and the plastication time is 3h; S3. Mixing: The plasticized raw rubber is put into a rubber mixer together with various compounding agents and fillers for mixing. Slow mixing is adopted and raw rubber is added in batches. S4. Tableting: After the mixing is completed, the rubber material is pressed through a tablet press to form a uniform film; S5. Storage: The film after pressing should be stored for more than 24 hours to ensure the uniformity and stability of the rubber; S6. Molding: The cooled rubber sheet is molded by a molding device to form the desired sole shape; S7. Vulcanization: The molded sole is vulcanized to improve its physical properties and high temperature resistance; S8.Finishing: After vulcanization, the sole is trimmed to remove excess edges and corners to ensure a smooth surface without burrs.

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