Rubber mixing equipment

Abstract

The invention discloses rubber mixing equipment, and relates to the technical field of rubber processing. The open mill comprises an open mill main body, a pair of rubber mixing rollers are rotationally connected to the open mill main body side by side; a push-pull mechanism is arranged above one rubber mixing roller; a sulfur storage box is arranged on the push-pull mechanism; a partition plate is vertically fixed in the sulfur storage box; the interior of the sulfur storage box is divided into a storage chamber and an output channel by the partition plate; the output channel is arranged on one side, close to the rubber mixing roller, of the storage chamber; a sulfur discharge hole is obliquely formed in the lower end of the output channel; the sulfur discharge hole is formed between the two rubber mixing rollers; a material lifting plate for placing sulfur is horizontally arranged in the material storage chamber; the material lifting plate is arranged on a jacking mechanism; the jacking mechanism can drive the material lifting plate to move up and down in the material storage cavity. And a material pushing mechanism is arranged above the material lifting plate. The sulfur adding device is reasonable in structural design and convenient to use, and the sulfur adding efficiency and effect are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of rubber processing, and particularly relates to a rubber mixing device. Background Art

[0002] Rubber mixing refers to the whole process in which raw rubber is plastically refined, various compounding agents are added in sequence, uniformly dispersed through plastic refining, and then sheeted, cooled and parked. According to the different equipment used, the mixing operation can be carried out by an open mill or an internal mixer. The open mill pulls the rubber stock between two oppositely rotating rolls at different linear speeds under the action of friction force into the roll gap. The stock passing through the roll gap is strongly sheared and extruded, so that the temperature of the rubber stock rises and the plasticity increases, thereby achieving the purpose of rubber refining.

[0003] At present, an appropriate amount of sulfur is usually added during the rubber mixing process of an open mill to vulcanize the rubber stock. In the prior art, usually, an operator first weighs an appropriate amount of sulfur using an electronic scale, and then manually pours the sulfur between two oppositely rotating rolls of the open mill. Although this method is relatively simple, sulfur dust will be generated during the manual pouring of sulfur, which will damage the respiratory system of the worker; moreover, the manual pouring of sulfur will also cause the sulfur to be unevenly spread on the rubber stock, thereby affecting the vulcanization efficiency of the rubber stock. Therefore, it is urgent to study a rubber mixing device to solve the above problems. Summary of the Invention

[0004] The present invention aims to provide a rubber mixing device, and its purpose is to solve the technical problems proposed in the above background art.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] The present invention provides a rubber mixing device, including an open mill main body; a pair of rubber mixing rolls are rotatably connected side by side on the open mill main body; a pushing and pulling mechanism is installed above one of the rubber mixing rolls; a sulfur storage box is installed on the pushing and pulling mechanism; a partition is vertically fixed in the sulfur storage box; the partition divides the interior of the sulfur storage box into a storage chamber and an output channel; the output channel is arranged on the side of the storage chamber close to the rubber mixing rolls; a sulfur discharge port is obliquely arranged at the lower end of the output channel; the sulfur discharge port is arranged between the two rubber mixing rolls; a lifting plate for placing sulfur is horizontally arranged in the storage chamber; the lifting plate is installed on a lifting mechanism; the lifting mechanism can drive the lifting plate to move up and down in the storage chamber; a pushing mechanism is installed above the lifting plate; the pushing mechanism can push the sulfur in the storage chamber into the output channel.

[0007] As a preferred technical solution of the present invention, the upper part of the sulfur storage box is an open structure; a top cover is horizontally fixed to the open structure of the sulfur storage box; and a pair of handles are fixed side by side on the upper surface of the top cover.

[0008] As a preferred technical solution of the present invention, the push-pull mechanism includes a pair of support seats fixed side by side on the upper part of the open mixing mill body; the two support seats are respectively arranged on the opposite sides of the rubber mixing roller; the upper parts of the two support seats are connected by a pair of guide rods parallel to the rubber mixing roller; the two guide rods are both arranged above the rubber mixing roller; a pair of sliders are arranged side by side between the two support seats; the two sliders are slidably connected to the two guide rods; the two sliders are respectively fixed on the opposite side walls of the sulfur storage box; the opposite outer sides of the two sliders are horizontally provided with bearing strips perpendicular to the guide rods; the two bearing strips are One end of the carrier strips is fixed on two guide rods; the other ends of the two carrier strips are connected by a rotating shaft; the rotating shaft and the two carrier strips are rotatably matched; the rotating shaft is arranged on the side of the guide rod away from the rubber mixing roller; a first pulley is fixedly sleeved on one end of the rotating shaft; the first pulley is connected to the second pulley through a synchronous belt drive; the second pulley is fixedly sleeved on the output shaft of a servo motor; the servo motor is fixed on the main body of the mixing mill; a cylindrical cam is coaxially fixed on the rotating shaft; a transmission column is slidably inserted in the working groove of the cylindrical cam; the transmission column is vertically fixed on the top cover.

[0009] As a preferred technical solution of the present invention, the opposite side walls of the sulfur storage box are vertically provided with through grooves connected to the storage chamber; the lifting mechanism includes two first rollers and two second rollers respectively arranged on opposite sides of the sulfur storage box; the two first rollers are respectively arranged above the two second rollers; both ends of the two first rollers are rotatably connected with first mounting blocks; two pairs of the first mounting blocks are respectively fixed on the opposite side walls of the sulfur storage box; both ends of the two second rollers are rotatably connected with second mounting blocks; two pairs of the second mounting blocks are fixed on the bottom wall of the sulfur storage box; any one of the first rollers and the second roller below it are connected by a sealing belt transmission; the two sealing belts are respectively arranged on the opposite outer sides of the through groove, and the outer surfaces of the two sealing belts are respectively slidably fitted with the outer port edges of the two through grooves; the two sealing belts are connected by a lifting strip; a weighing sensor is fixed on the upper surface of the lifting strip; the upper part of the weighing sensor is connected to the lower surface of the lifting plate.

[0010] As a preferred technical solution of the present invention, baffles are vertically arranged on the inner sides of the two sealing belts; the two baffles are respectively fixed on the opposite side walls of the sulfur storage box; the opposite inner sides of the two baffles are respectively slidably fitted with the inner surfaces of the two sealing belts.

[0011] As a preferred technical solution of the present invention, mounting seats are arranged above the two first rollers; the two mounting seats are respectively fixed on the opposite side walls of the sulfur storage box; screw sleeves are vertically rotatably connected to the two mounting seats; screw rods are in threaded fit with the two screw sleeves; connecting blocks are fixed to the lower ends of the two screw rods; the two connecting blocks are respectively fixed on the outer surface of the sealing belt; rotating cylinders parallel to the rotating shaft are horizontally rotatably connected to the upper parts of the two mounting seats; first bevel gears are fixedly sleeved on the adjacent ends of the two rotating cylinders; second bevel gears are meshed with the two first bevel gears; the two second bevel gears are respectively fixedly sleeved on the outer circumferences of the two screw sleeves; spline shafts are slidably inserted into the two rotating cylinders; the separated ends of the two spline shafts are respectively rotatably connected to the two bearing strips; third belt pulleys are fixedly sleeved on the separated ends of the two spline shafts; the two third belt pulleys are respectively connected to fourth belt pulleys through synchronous belts; the two fourth belt pulleys are fixedly sleeved on the outer circumference of the rotating shaft.

[0012] As a preferred technical solution of the present invention, the pushing mechanism includes a cylinder horizontally fixed on the side wall of the sulfur storage box away from the rubber mixing roller, and the output end of the cylinder slidably penetrates through this side wall of the sulfur storage box and is vertically fixed with a mounting plate parallel to the partition board; a magnetic block is vertically slidably connected to the side of the mounting plate away from the cylinder; a pushing plate parallel to the partition board is vertically fixed on the magnetic block; an electromagnet is arranged above the magnetic block; the electromagnet is fixed at the upper edge of the mounting plate; when the opposite surfaces of the electromagnet and the magnetic block have different magnetic properties, the magnetic block is adsorbed on the electromagnet, and the horizontal position of the lower edge of the pushing plate is higher than the horizontal position of the upper edge of the partition board; when the opposite surfaces of the electromagnet and the magnetic block have the same magnetic properties, the magnetic block is separated from the electromagnet, and the lower edge of the pushing plate is flush with the upper edge of the partition board.

[0013] The present invention has the following beneficial effects:

[0014] In the present invention, sulfur is poured onto the lifting plate, and the amount of sulfur reaches the upper edge of the partition board. When it is necessary to pour sulfur onto the rubber material on the rubber mixing roller, the lifting mechanism drives the lifting plate to move upward in the storage cavity, so that the sulfur in the storage cavity overflows. Then, the pushing mechanism pushes the overflowed sulfur into the output channel, so that the sulfur is scattered on the rubber material between the two rubber mixing rollers through the output channel and the sulfur discharge port. At the same time, the pushing and pulling mechanism drives the sulfur storage box to move back and forth linearly along the axial direction of the rubber mixing roller, so as to realize uniform scattering of sulfur on the rubber material, which not only effectively improves the addition efficiency and addition uniformity of sulfur, but also avoids workers participating in the sulfur addition process, effectively ensuring the physical health of workers and the vulcanization efficiency of the rubber material.

[0015] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a rubber mixing device of the present invention.

[0018] Figure 2 It is Figure 1 the side view of the structure.

[0019] Figure 3 It is a schematic structural diagram of the connection between the push-pull mechanism, sulfur storage tank and lifting mechanism of the present invention.

[0020] Figure 4 It is a schematic structural diagram of the push-pull mechanism of the present invention.

[0021] Figure 5 It is a schematic structural diagram of the connection between the sulfur storage tank and the lifting mechanism of the present invention.

[0022] Figure 6 It is Figure 5 the front view of the structure.

[0023] Figure 7 It is Figure 5 the side view of the structure.

[0024] Figure 8 It is a schematic diagram of the relative position between the sealing belt and the baffle of the present invention.

[0025] Figure 9 It is a schematic structural diagram of the lifting mechanism of the present invention.

[0026] In the drawings, the list of components represented by each reference numeral is as follows:

[0027] 1 - Banbury mixer main body, 2 - Rubber mixing roll, 3 - Push - pull mechanism, 4 - Sulfur storage box, 5 - Material - lifting plate, 6 - Jacking mechanism, 7 - Pushing - material mechanism, 301 - Support seat, 302 - Guide rod, 303 - Slide block, 304 - Bearing plate strip, 305 - Rotating shaft, 306 - First pulley, 307 - Second pulley, 308 - Servo motor, 309 - Cylindrical cam, 310 - Transmission column, 401 - Partition board, 402 - Storage chamber, 403 - Output channel, 404 - Sulfur discharge port, 405 - Top cover, 406 - Handle, 407 - Through - slot, 601 - First roller, 602 - Second roller, 603 - First mounting block, 604 - Second mounting block, 605 - Sealing strip, 606 - Jacking plate strip, 607 - Weighing sensor, 608 - Baffle, 609 - Mounting seat, 610 - Nut sleeve, 611 - Screw rod, 612 - Connecting block, 613 - Rotating cylinder, 614 - First bevel gear, 615 - Second bevel gear, 616 - Spline shaft, 617 - Third pulley, 618 - Fourth pulley, 701 - Cylinder, 702 - Mounting plate, 703 - Magnetic block, 704 - Pushing plate, 705 - Electromagnet. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] Please refer to Figures 1-3 and Figures 6-7As shown in the figure, the present invention is a rubber mixing equipment, including a conventional open mill body 1 in the art; a pair of rubber mixing rollers 2 are rotatably connected side by side on the open mill body 1; a pushing and pulling mechanism 3 is installed above one of the rubber mixing rollers 2; a sulfur storage tank 4 is installed on the pushing and pulling mechanism 3; the upper part of the sulfur storage tank 4 is an open structure; a top cover 405 is horizontally bolted to the open structure of the sulfur storage tank 4; a pair of conventional handles 406 in the art are bolted side by side on the upper surface of the top cover 405; a partition plate 401 is vertically welded inside the sulfur storage tank 4; the partition plate 401 divides the interior of the sulfur storage tank 4 into a storage chamber 402 and an output channel 403; the output channel 403 is arranged on one side of the storage chamber 402 close to the rubber mixing roller 2; a sulfur discharge port 404 is inclined at the lower end of the output channel 403; the sulfur discharge port 404 is arranged between the two rubber mixing rollers 2; a lifting plate 5 for placing sulfur is horizontally arranged in the storage chamber 402; the lifting plate 5 is installed on a lifting mechanism 6; the lifting mechanism 6 can drive the lifting plate 5 to move up and down in the storage chamber 402; a pushing mechanism 7 is installed above the lifting plate 5; the pushing mechanism 7 can push the sulfur in the storage chamber 402 into the output channel 403. When in use, by pouring sulfur onto the lifting plate 5 and making the amount of sulfur reach the upper edge of the partition plate 401, when it is necessary to pour sulfur onto the rubber material on the rubber mixing roller 2, the lifting mechanism 6 drives the lifting plate 5 to move upward in the storage chamber 402, prompting the sulfur in the storage chamber 402 to overflow, and then the pushing mechanism 7 pushes the overflowed sulfur into the output channel 403, realizing that the sulfur is scattered on the rubber material between the two rubber mixing rollers 2 through the output channel 403 and the sulfur discharge port 404. At the same time, the pushing and pulling mechanism 3 drives the sulfur storage tank 4 to reciprocate linearly along the axial direction of the rubber mixing roller 2, thereby realizing the uniform scattering of sulfur on the rubber material, not only effectively improving the addition efficiency and uniformity of sulfur, but also avoiding workers' participation in the sulfur addition process and ensuring the vulcanization efficiency of the rubber material.

[0031] Embodiment 2:

[0032] On the basis of Embodiment 1, as Figures 3-6As shown in the figure, the push-pull mechanism 3 includes a pair of support seats 301 bolted side by side to the upper part of the mixer main body 1; the two support seats 301 are respectively arranged on the opposite sides of the rubber mixing roll 2; the upper parts of the two support seats 301 are connected by a pair of guide rods 302 parallel to the rubber mixing roll 2; the two guide rods 302 are both arranged above the rubber mixing roll 2; a pair of sliders 303 are arranged side by side between the two support seats 301; the two sliders 303 are both slidably connected to the two guide rods 302; the two sliders 303 are respectively bolted to the opposite side walls of the sulfur storage tank 4; horizontally arranged on the opposite outer sides of the two sliders 303 are load-bearing strips 304 perpendicular to the guide rods 302; one ends of the two load-bearing strips 304 are respectively bolted to the two guide rods 302; the other ends of the two load-bearing strips 304 are connected by a rotating shaft 305; the rotating shaft 305 is rotationally matched with the two load-bearing strips 304; the rotating shaft 305 is arranged on the side of the guide rod 302 away from the rubber mixing roll 2; a first belt pulley 306 is key-connected to one end of the rotating shaft 305; the first belt pulley 306 is connected to a second belt pulley 307 by a synchronous belt drive; the second belt pulley 307 is key-connected to the output shaft of a servo motor 308; the servo motor 308 is bolted to the mixer main body 1; a conventional cylindrical cam 309 in the field is coaxially fixed on the rotating shaft 305; a transmission column 310 is slidably inserted into the working groove of the cylindrical cam 309; the transmission column 310 vertically penetrates through the top cover 405, and the transmission column 310 is threadedly connected to the top cover 405. When in use, the servo motor 308 drives the cylindrical cam 309 to rotate through the second belt pulley 307, the first belt pulley 306 and the rotating shaft 305, so as to cause the transmission column 310 to drive the sulfur storage tank 4 to reciprocate along the length direction of the guide rod 302 through the top cover 405, thereby realizing uniform spreading of sulfur on the rubber material and effectively improving the addition efficiency of sulfur; in addition, when it is necessary to remove the top cover 405 from the sulfur storage tank 4, by rotating the transmission column 310 downward on the top cover 405, the transmission column 310 is separated from the cylindrical cam 309, and then the bolts between the top cover 405 and the sulfur storage tank 4 are removed, and the top cover 405 can be removed from the sulfur storage tank 4 through the handle 406.

[0033] Embodiment 3:

[0034] Based on Embodiment 2, as Figures 5-9As shown, through slots 407 communicating with the storage chamber 402 are vertically formed in the opposite side walls of the sulfur storage box 4; the lifting mechanism 6 includes two first rollers 601 and two second rollers 602 respectively arranged on the opposite sides of the sulfur storage box 4; the two first rollers 601 are respectively arranged above the two second rollers 602; both ends of the two first rollers 601 are rotatably connected with first mounting blocks 603; the two pairs of first mounting blocks 603 are respectively bolted to the opposite side walls of the sulfur storage box 4; both ends of the two second rollers 602 are rotatably connected with second mounting blocks 604; the two pairs of second mounting blocks 604 are both bolted to the bottom wall of the sulfur storage box 4; any one of the first rollers 601 is drivingly connected with the second roller 602 below it through a sealing belt 605; the two sealing belts 605 are respectively arranged on the opposite outer sides of the through slots 407, and the outer surfaces of the two sealing belts 605 are respectively in sliding fit with the edges of the outer ports of the two through slots 407; the two sealing belts 605 are bolted together through a lifting strip 606; a conventional weighing sensor 607 in the art is bolted to the upper surface of the lifting strip 606; the upper part of the weighing sensor 607 is connected to the lower surface of the lifting plate 5; baffles 608 are vertically arranged on the inner sides of the two sealing belts 605; the two baffles 608 are respectively bolted to the opposite side walls of the sulfur storage box 4; the opposite inner side surfaces of the two baffles 608 are respectively in sliding fit with the inner surfaces of the two sealing belts 605; mounting seats 609 are arranged above the two first rollers 601; the two mounting seats 609 are respectively bolted to the opposite side walls of the sulfur storage box 4; screw sleeves 610 are vertically rotatably connected to the two mounting seats 609; screw rods 611 are in threaded fit with the two screw sleeves 610; the lower ends of the two screw rods 611 are bolted with connecting blocks 612; the two connecting blocks 612 are respectively bolted to the outer surfaces of the sealing belts 605; rotating cylinders 613 parallel to the rotating shaft 305 are horizontally rotatably connected to the upper parts of the two mounting seats 609; first bevel gears 614 are key-connected to the adjacent ends of the two rotating cylinders 613; second bevel gears 615 are meshed with the two first bevel gears 614; the two second bevel gears 615 are respectively key-connected to the outer circumferences of the two screw sleeves 610; spline shafts 616 conventional in the art are slidably inserted into the two rotating cylinders 613; the separated end parts of the two spline shafts 616 are respectively rotatably connected to the two bearing strips 304; third pulleys 617 are key-connected to the separated ends of the two spline shafts 616; the two third pulleys 617 are respectively drivingly connected with fourth pulleys 618 through synchronous belts; the two fourth pulleys 618 are key-connected to the outer circumference of the rotating shaft 305.During use, the rotation shaft 305 drives the two spline shafts 616 to rotate synchronously through the fourth pulley 618 and the third pulley 617, causing the spline shafts 616 to drive the two screw sleeves 610 to rotate synchronously through the rotating cylinder 613, the first bevel gear 614 and the second bevel gear 615. Then, the screw 611 drives the two connecting blocks 612 to move downward synchronously, causing the sealing belt 605 to drive the lifting strip 606 to move upward, realizing the overflow of sulfur from the storage chamber 402. At the same time, the load cell 607 detects the weight of sulfur on the lifting plate 5 in real time, thus ensuring the accuracy of sulfur addition.

[0035] Embodiment 4:

[0036] Based on Embodiment 3 as Figures 5-6 shown, the pushing mechanism 7 includes a cylinder 701 horizontally bolted to the side wall of the sulfur storage tank 4 away from the rubber mixing roll 2, and the output end of the cylinder 701 slidably penetrates through this side wall of the sulfur storage tank 4 and is vertically bolted with a mounting plate 702 parallel to the partition plate 401; a magnetic block 703 is vertically slidably connected to one side surface of the mounting plate 702 away from the cylinder 701; a pushing plate 704 parallel to the partition plate 401 is vertically bolted to the magnetic block 703; a conventional electromagnet 705 in the art is arranged above the magnetic block 703; the electromagnet 705 is bolted to the upper edge of the mounting plate 702; when the opposite surfaces of the electromagnet 705 and the magnetic block 703 have different magnetic polarities, the magnetic block 703 is adsorbed on the electromagnet 705, and the horizontal position of the lower edge of the pushing plate 704 is higher than the horizontal position of the upper edge of the partition plate 401; when the opposite surfaces of the electromagnet 705 and the magnetic block 703 have the same magnetic polarity, the magnetic block 703 is separated from the electromagnet 705, and the lower edge of the pushing plate 704 is flush with the upper edge of the partition plate 401. During use, by setting the opposite surfaces of the electromagnet 705 and the magnetic block 703 to have the same magnetic polarity, the magnetic block 703 is separated from the electromagnet 705, and the lower edge of the pushing plate 704 is flush with the upper edge of the partition plate 401. After sulfur overflows from the storage chamber 402, the cylinder 701 drives the pushing plate 704 to move linearly, causing the overflowing sulfur to be pushed by the pushing plate 704 into the output channel 403, thus realizing the excretion of sulfur. Then, by setting the opposite surfaces of the electromagnet 705 and the magnetic block 703 to have different magnetic polarities, the magnetic block 703 is adsorbed on the electromagnet 705, realizing that the horizontal position of the lower edge of the pushing plate 704 is higher than the horizontal position of the upper edge of the partition plate 401. At this time, the cylinder 701 drives the pushing plate 704 to reset, avoiding problems such as interference between the lower edge of the pushing plate 704 and the sulfur in the storage chamber 402 during the reset process of the pushing plate 704, and also effectively avoiding problems such as accumulation of sulfur in the storage chamber 402, effectively improving the excretion efficiency and effect of sulfur; after the pushing plate 704 is reset, the magnetic block 703 is separated from the electromagnet 705 again, realizing that the lower edge of the pushing plate 704 is flush with the upper edge of the partition plate 401, and the pushing plate 704 is ready for the next pushing operation.

[0037] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A rubber mixing equipment, comprising an open mill body (1); a pair of rubber mixing rollers (2) are rotatably connected side by side to the open mill body (1); characterized in that: A push-pull mechanism (3) is arranged above the rubber mixing roller (2); a sulfur storage box (4) is arranged on the push-pull mechanism (3); a partition (401) is vertically fixed inside the sulfur storage box (4); the partition (401) divides the interior of the sulfur storage box (4) into a storage chamber (402) and an output channel (403); the output channel (403) is arranged on a side of the storage chamber (402) close to the rubber mixing roller (2); a sulfur discharge port (404) is obliquely arranged at the lower end of the output channel (403); the sulfur discharge port (404) is arranged between the two rubber mixing rollers (2); A lifting plate (5) for placing sulfur is horizontally arranged in the storage chamber (402); the lifting plate (5) is installed on a lifting mechanism (6); the lifting mechanism (6) can drive the lifting plate (5) to move up and down in the storage chamber (402); a pushing mechanism (7) is installed above the lifting plate (5); the pushing mechanism (7) can push the sulfur in the storage chamber (402) into the output channel (403).

2. A rubber mixing equipment according to claim 1, characterized in that: The upper part of the sulfur storage box (4) is an open structure; a top cover (405) is horizontally fixed at the open structure of the sulfur storage box (4); and a pair of handles (406) are fixed side by side on the upper surface of the top cover (405).

3. A rubber mixing equipment according to claim 2, characterized in that: The push-pull mechanism (3) comprises a pair of support seats (301) fixed side by side on the upper part of the mixing mill body (1); the two support seats (301) are respectively arranged on opposite sides of the rubber mixing roller (2); the upper parts of the two support seats (301) are connected by a pair of guide rods (302) parallel to the rubber mixing roller (2); the two guide rods (302) are both arranged above the rubber mixing roller (2); a pair of sliders (303) are arranged side by side between the two support seats (301); the two sliders (303) are both slidably connected to the two guide rods (302); the two sliders (303) are respectively fixed on opposite side walls of the sulfur storage box (4).

4. A rubber mixing equipment according to claim 3, characterized in that: The two sliders (303) are both horizontally provided with load-bearing strips (304) perpendicular to the guide rods (302) on their opposite outer sides; one end of each of the two load-bearing strips (304) is fixed to the two guide rods (302); the other ends of the two load-bearing strips (304) are connected via a rotating shaft (305); the rotating shaft (305) and the two load-bearing strips (304) are both rotatably matched; the rotating shaft (305) is arranged on the side of the guide rod (302) away from the rubber mixing roller (2); one end of the rotating shaft (305) is fixed A first pulley (306) is sleeved thereon; the first pulley (306) is connected to a second pulley (307) via a synchronous belt drive; the second pulley (307) is fixedly sleeved on an output shaft of a servo motor (308); the servo motor (308) is fixed on the main body (1) of the mixing mill; a cylindrical cam (309) is coaxially fixed on the rotating shaft (305); a transmission column (310) is slidably inserted into a working groove of the cylindrical cam (309); the transmission column (310) is vertically fixed on the top cover (405).

5. A rubber mixing equipment according to claim 3 or 4, characterized in that: The opposite side walls of the sulfur storage box (4) are vertically provided with through grooves (407) connected to the storage chamber (402); the lifting mechanism (6) comprises two first rollers (601) and two second rollers (602) respectively arranged on opposite sides of the sulfur storage box (4); the two first rollers (601) are respectively arranged above the two second rollers (602); both ends of the two first rollers (601) are rotatably connected to the first mounting blocks (603); two pairs of the first mounting blocks (603) are respectively fixed on the opposite side walls of the sulfur storage box (4); both ends of the two second rollers (602) are rotatably connected to the second mounting blocks (604); the two pairs of The second mounting blocks (604) are all fixed on the bottom wall of the sulfur storage box (4); any one of the first rollers (601) is connected to the second roller (602) below it through a sealing belt (605); the two sealing belts (605) are respectively arranged on the opposite outer sides of the through groove (407), and the outer surfaces of the two sealing belts (605) are respectively slidably fitted with the outer port edges of the two through grooves (407); the two sealing belts (605) are connected through a lifting strip (606); a weighing sensor (607) is fixed on the upper surface of the lifting strip (606); the upper part of the weighing sensor (607) is connected to the lower surface of the lifting plate (5).

6. A rubber mixing equipment according to claim 5, characterized in that: Baffles (608) are vertically arranged on the inner sides of the two sealing belts (605); the two baffles (608) are respectively fixed on the opposite side walls of the sulfur storage box (4); and the opposite inner sides of the two baffles (608) are respectively slidably fitted with the inner surfaces of the two sealing belts (605).

7. A rubber mixing equipment according to claim 6, characterized in that: A mounting seat (609) is provided above the two first rollers (601); the two mounting seats (609) are respectively fixed on the opposite side walls of the sulfur storage box (4); the two mounting seats (609) are vertically rotatably connected with a screw sleeve (610); the two screw sleeves (610) are threadedly matched with a screw rod (611); the lower ends of the two screw rods (611) are fixed with a connecting block (612); the two connecting blocks (612) are respectively fixed on the outer surface of the sealing belt (605).

8. A rubber mixing equipment according to claim 7, characterized in that: The upper parts of the two mounting seats (609) are both horizontally rotatably connected with a rotating cylinder (613) parallel to the rotating shaft (305); the adjacent ends of the two rotating cylinders (613) are both fixedly sleeved with a first bevel gear (614); the two first bevel gears (614) are both meshed with a second bevel gear (615); the two second bevel gears (615) are respectively fixedly sleeved on the outer peripheries of the two screw sleeves (610); a spline shaft (616) is slidably inserted in the two rotating cylinders (613); the separated ends of the two spline shafts (616) are respectively rotatably connected to the two bearing strips (304); the separated ends of the two spline shafts (616) are both fixedly sleeved with a third pulley (617); the two third pulleys (617) are respectively connected to a fourth pulley (618) through a synchronous belt drive; the two fourth pulleys (618) are both fixedly sleeved on the outer periphery of the rotating shaft (305).

9. A rubber mixing equipment according to claim 7 or 8, characterized in that: The pushing mechanism (7) comprises a cylinder (701) fixed horizontally on a side wall of a sulfur storage box (4) away from a rubber mixing roller (2), and the output end of the cylinder (701) slides through the side wall of the sulfur storage box (4) and is vertically fixed with a mounting plate (702) parallel to the partition (401); a side of the mounting plate (702) away from the cylinder (701) is vertically slidably connected with a magnetic block (703); a pushing plate (704) parallel to the partition (401) is vertically fixed on the magnetic block (703); an electromagnet (705) is arranged above the magnetic block (703) ); the electromagnet (705) is fixed at the upper edge of the mounting plate (702); when the relative surfaces of the electromagnet (705) and the magnetic block (703) have different magnetic properties, the magnetic block (703) is adsorbed on the electromagnet (705), and the horizontal position of the lower edge of the push plate (704) is higher than the horizontal position of the upper edge of the partition (401); when the relative surfaces of the electromagnet (705) and the magnetic block (703) have the same magnetic properties, the magnetic block (703) and the electromagnet (705) are separated, and the lower edge of the push plate (704) is flush with the upper edge of the partition (401).

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