Rubber mixing machine and rubber mixing process for processing flame-retardant high-temperature-resistant safety shoe rubber sole rubber material

Abstract

The invention relates to the related technical field of rubber sole processing and rubber mixing processes, and discloses a rubber mixing machine and a rubber mixing process for processing a flame-retardant and high-temperature-resistant safety shoe rubber sole rubber material, a semi-closed rubber mixing tank is adopted, so that two groups of rubber mixing rollers can automatically move flattened rubber to the upper side again for next rolling during rotation, and the rubber mixing efficiency is improved. The rubber mixing device is simple in structure and convenient to operate, manual feeding is not needed, meanwhile, the two sets of rubber scraping plates in the rubber mixing tank are matched, the motor can drive the lead screw to drive the two sets of rubber scraping plates to do reciprocating motion, rubber is continuously gathered towards the center and turned over, the trouble of manual turning over is omitted, automatic rubber mixing is achieved, and the rubber mixing efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of rubber sole processing and rubber refining technology, in particular to a rubber mixing machine and a rubber refining technology for processing rubber materials of flame-retardant and high-temperature-resistant safety shoes rubber soles. Background Art

[0002] The processing of rubber soles includes multiple steps, among which rubber mixing is a key link. Rubber mixing machine plays an important role in the production of rubber products. It is mainly used to extrude sheets of mixed rubber and evenly mix various compounding agents and vulcanizers.

[0003] The mixing process in the traditional rubber mixing process requires the use of an open rubber mixing machine, but the traditional open rubber mixing machine can only operate semi-automatically, and workers are required to manually load the material continuously and cut and turn the rubber over so that the rubber can be mixed quickly and evenly. This operation is not only time-consuming and labor-intensive, but also inefficient. 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 rubber soles of flame-retardant and high-temperature resistant safety shoes, so as to solve the problem that the current traditional open rubber mixing machine is not only time-consuming and labor-intensive, but also inefficient as mentioned in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical scheme: a rubber mixing machine and a rubber mixing process for processing rubber compound for flame-retardant and high-temperature-resistant safety shoes, comprising a rubber mixing tank, in which a first rubber mixing roller and a second rubber mixing roller are rotatably connected, the first rubber mixing roller and the second rubber mixing roller are parallel to each other, a driving motor is arranged at one end of the rubber mixing tank, and the first rubber mixing roller and the second rubber mixing roller rotate in opposite directions; 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, the first lifting block slides up and down in the first lifting frame, a first hydraulic cylinder is fixedly connected to the top of the first lifting frame, and the output end of the first hydraulic cylinder is fixedly connected to 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, the second lifting block slides up and down in the second lifting frame, a second hydraulic cylinder is fixedly connected to the top of the second lifting frame, and the output end of the second hydraulic cylinder is fixedly connected to the second lifting block; A linear guide and a screw rod are fixedly connected between the first lifting block and the second lifting block, a first slider is movably connected to the linear guide and the screw rod, the first slider is slidably connected to the linear guide, the first slider is connected to the screw rod through a screw nut, a first scraper plate is arranged outside the first rubber mixing roller and the second rubber mixing roller, a first magnetic connection block is fixedly connected to the first scraper plate through bolts, the first magnetic connection block and the first slider are mutually embedded, a second slider is also movably connected to the linear guide and the screw rod, the second slider is slidably connected to the linear guide, the second slider is connected to the screw rod through a screw nut, a second scraper plate is also arranged outside the first rubber mixing roller and the second rubber mixing roller, a second magnetic connection block is fixedly connected to the second scraper plate through bolts, and the second magnetic connection block and the second slider are mutually embedded; A center positioning block is arranged between the first slider and the second slider, and the center positioning block is slidably connected to the linear guide rail and the lead screw, a fixing plate is fixedly connected below the center positioning block, a cutting blade is fixedly connected below the fixing plate, and rubber scrapers are movably connected to both sides of the fixing plate.

[0006] Furthermore, the output shaft of the driving motor is fixedly connected to a driving pulley, the driving pulley is connected to a driven pulley through a belt drive, a worm is fixedly connected to one side of the driven pulley, the worm is meshed with a worm wheel, the worm wheel is fixedly connected to a driving gear, the driving gear is fixedly connected to one end of the second rubber mixing roller, and one end of the first rubber mixing roller is fixedly connected to a driven gear, and the driven gear and the driving gear are meshed with each other.

[0007] Furthermore, the thread on the screw rod is divided into two sections, and the two sections have opposite directions. The first slider is connected to one section of the thread of the screw rod, and the second slider is connected to the other section of the thread of the screw rod.

[0008] Furthermore, the two sections of threads on the screw rod are connected via a polished rod, the center positioning block is slidably connected to the polished rod at the center of the screw rod, and the center positioning block is slidably connected to the linear guide rail.

[0009] Furthermore, two groups of first slots are provided in the first slider, first magnets are embedded in the first slots, two groups of second slots are provided in the first magnetic connection block, movable pins are inserted in the second slots, a second magnet is fixedly connected to the upper end of the movable pin, the first magnet and the second magnet 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.

[0010] Furthermore, when the first lifting block and the second lifting block move to the lowermost end, the lower end surfaces of the first sliding block and the second sliding block are respectively at the same height as the upper end surfaces of the first magnetic connection block and the second magnetic connection block.

[0011] Furthermore, the rubber scraper is curved in an arc shape, and two groups of rubber scrapers are provided, the two groups of rubber scrapers are fixedly connected by a connecting plate, a lifting rod is fixedly connected above the connecting plate, the lifting rod passes through the fixed plate, a spring stopper is fixedly connected to the upper end of the lifting rod, a pressure spring is provided on the outer sleeve of the lifting rod, and the pressure spring is located between the spring stopper and the fixed plate.

[0012] Furthermore, the inner sides of the first and second rubber scraping plates are in contact with the outer surfaces of the first and second rubber mixing rollers, and the outer sides of the first and second rubber scraping plates are in contact with the inner wall of the rubber mixing tank.

[0013] Furthermore, the width of the first scraper plate and the second scraper plate is smaller than the length of the polished rod portion at the center of the screw rod.

[0014] The present invention provides another technical solution: a rubber refining process for processing a rubber compound for a flame retardant and high temperature resistant safety shoe rubber sole, comprising the following steps: 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 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; 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; S4. Tableting: After the mixing is completed, the rubber material is pressed through a tablet press to form a uniform film; S5. Parking: The film after pressing needs to be parked 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 needs to be vulcanized to improve its physical properties and high temperature resistance; S8.Finishing: The vulcanized sole needs to be trimmed to remove excess edges and corners to ensure a smooth surface without burrs.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The rubber mixing machine and rubber mixing process for processing rubber compound for rubber soles of flame-retardant and high-temperature-resistant safety shoes of the present invention adopt a semi-enclosed rubber mixing tank, so that two groups of rubber mixing rollers can automatically move the flattened rubber to the upper side again for the next round of rolling when rotating, without manual feeding, and at the same time cooperate with two groups of rubber scraping plates in the rubber mixing tank, and the two groups of rubber scraping plates can be driven to reciprocate by a motor-driven screw rod, so as to continuously gather the rubber toward the center and turn it over, eliminating the trouble of manual turning over, realizing automatic rubber mixing, and greatly improving the efficiency of rubber mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the rubber mixing tank of the present invention; Figure 2 It is a schematic diagram of the structure of the first rubber mixing roller and the second rubber mixing roller of the present invention; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4 It is a cross-sectional structural schematic diagram of a rubber mixing tank of the present invention; Figure 5 This is a schematic diagram of the structure of the rubber scraper of the present invention; Figure 6 This is a schematic diagram of the structure of the center positioning block of the present invention; Figure 7 This is a schematic diagram of the structure of the first magnetic connection block of the present invention.

[0017] Numbers in the figure: 1, rubber mixing tank; 2, first rubber mixing roller; 3, second rubber mixing roller; 4, driving motor; 5, driving pulley; 6, driven pulley; 7, worm; 8, worm wheel; 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; 18, lead screw; 19, servo motor; 20, first slider; 2001, The first slot; 2002, the first magnet; 21, the first scraper plate; 22, the first magnetic connection block; 2201, the second slot; 2202, the movable latch; 2203, the second magnet; 23, the second slider; 24, the second scraper plate; 25, the second magnetic connection block; 26, the center positioning block; 27, the fixing plate; 28, the cutting blade; 29, the rubber scraper; 2901, the connecting plate; 2902, the lifting rod; 2903, the spring stopper; 2904, the pressure spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0020] Combination Figure 1 - Figure 7 The invention discloses a rubber mixing machine for processing rubber sole rubber compound for flame-retardant and high-temperature resistant safety shoes, comprising a rubber mixing tank 1, in which a first rubber mixing roller 2 and a second rubber mixing roller 3 are rotatably connected, and the first rubber mixing roller 2 and the second rubber mixing roller 3 are parallel to each other. A driving motor 4 is arranged at one end of the rubber mixing tank 1, and an output shaft of the driving motor 4 is fixedly connected to a driving pulley 5, and the driving pulley 5 is connected to a driven pulley 6 through a belt transmission. A worm 7 is fixedly connected to one side of the driven pulley 6, and the worm 7 is meshed with a worm wheel 8, and the worm wheel 8 is fixedly connected to a driving gear 9, and the driving gear 9 is fixedly connected to one end of the second rubber mixing roller 3, and a driven gear 10 is fixedly connected to one end of the first rubber mixing roller 2, and the driven gear 10 is meshed with the driving gear 9. The driving motor 4 drives the first rubber mixing roller 2 and the second rubber mixing roller 3 to rotate in the opposite direction through the pulley transmission, the worm gear transmission and the gear transmission, so as to roll and mix the rubber.

[0021] A first lifting frame 11 is fixedly connected to one end of the rubber 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, 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, a second lifting frame 14 is fixedly connected to the other end of the rubber mixing tank 1, a second lifting frame 14 is arranged in the second lifting block 15, 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 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.

[0022] 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.

[0023] The first slider 20 is provided with two groups of first slots 2001, in which 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, in which movable latches 2202 are inserted, and the upper ends of the movable latches 2202 are fixedly connected with second magnets 2203, and 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, and when the first lifting block 12 and the second lifting block 15 move to the lowest end, the lower end surfaces of the first slider 20 and the second slider 23 are respectively aligned with the upper end surfaces of the first magnetic connection block 22 and the second magnetic connection block 25, etc. High, so that when the first lifting block 12 and the second lifting block 15 move to the lowest end, the servo motor 19 drives the lead screw 18 to rotate back and forth, 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 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, so that the first slider 20 can drive the first scraper plate 21 to continuously move back and forth through the first magnetic connection block 22, and similarly, the second slider 23 will also drive the second scraper plate 24 to continuously move back and forth. 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.

[0024] Specifically, the thread on the screw rod 18 is divided into two sections, and the two sections of the thread are in 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 at the same time, and then periodically drive the first scraper plate 21 and the second scraper plate 24 to scrape the rubber to the middle.

[0025] A center positioning block 26 is provided between the first slider 20 and the second slider 23. The two sections of threads on the screw rod 18 are connected by a polished rod. The center positioning block 26 is slidably connected to the polished rod at the center of the screw rod 18. The center positioning block 26 is slidably connected to the linear guide rail 17. Therefore, when the screw rod 18 rotates, the center positioning block 26 will not be driven to move. A fixed plate 27 is fixedly connected below the center positioning block 26. A cutting blade 28 is fixedly connected below the fixed plate 27. Rubber scrapers 29 are movably connected to both sides of the fixed plate 27. The rubber scrapers 29 are curved in an arc shape. There are two groups of rubber scrapers 29, which are fixedly connected by 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. The width of the first scraper plate 21 and the second scraper plate 24 is smaller than the length of the light rod part at the center of the screw rod 18.

[0026] Working principle: When plasticating and mixing the 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, the rubber will be rolled. After rolling, the rubber will extend to both ends of the first rubber mixing roller 2 and the second rubber mixing roller 3 and fall under 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, the rubber under the first rubber mixing roller 2 and the second rubber mixing roller 3 will be transported to the top of the first rubber mixing roller 2 and the second rubber mixing roller 3 for repeated 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, so that the cutting blade 28 is close to the first rubber mixing roller 2 and the second rubber mixing roller 3, thereby cutting the rubber sheet to speed up the mixing.

[0027] 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.

[0028] 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: 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. 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; 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; S4. Tableting: After the mixing is completed, the rubber material is pressed through a tablet press to form a uniform film; 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; S6. Molding: The cooled rubber sheet is molded by a molding device to form the desired sole shape; S7. Vulcanization: The molded sole needs to be vulcanized to improve its physical properties and high temperature resistance; S8.Finishing: The vulcanized sole needs to be trimmed to remove excess edges and corners to ensure a smooth surface without burrs.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 sole 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 the 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 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; 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; 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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