An internal mixer feeding system

Abstract

The present invention belongs to the technical field of feeding, and specifically relates to a feeding system for an internal mixer, including a feeding and pressing device; the feeding and pressing device includes a pressing chamber; a pneumatic system is installed at the top of the pressing chamber; a pull rod is installed at the top of the pressing chamber; the pull rod extends into the interior of the pressing chamber; a top plug is installed at the bottom of the pull rod; the outer circumferential surface of the pressing chamber is cylindrical; the inner cavity of the pressing chamber is rectangular; a material cylinder is provided on the outer circumference of the pressing chamber; a top plate is fixedly connected to the top of the material cylinder; the annular cavity between the material cylinder and the pressing chamber is a blanking cavity; a first ring plate is rotatably connected in the blanking cavity; a feed pipe is installed on the side wall of the material cylinder; a material guiding component is provided in the blanking cavity; The present invention is mainly used to solve the problem that when the existing internal mixer feeds materials, the raw materials are directly introduced into the pressing chamber through the blanking cylinder, resulting in uneven accumulation of the raw materials falling into the internal mixing chamber.

Description

Technical Field

[0001] The present invention belongs to the technical field of feeding, and specifically relates to a feeding system for an internal mixer. Background Art

[0002] An internal mixer is a mechanical device commonly used in the rubber industry for mixing rubber. Mixing is an important process in the production of rubber products, and the process can uniformly mix different rubber raw materials and other additives to improve the wear resistance, high-temperature resistance, and lifespan of the products;

[0003] An internal mixer usually consists of a feeding and pressing device, a mixing chamber, a rotor, an upper plug, a lower plug, a heating and cooling system, a transmission system, a lubrication system, a control system, and other parts.

[0004] Its working principle is to add raw rubber and various compounding agents into the mixing chamber, and through two relatively rotating rotors, strongly shear, extrude, and stir the materials, so that the materials can achieve the effects of uniform mixing and plasticization in a short time.

[0005] When the internal mixer mixes raw materials, first add the rubber compound and additives into the mixing chamber one by one. First add the rubber compound, and then add the additives in batches to ensure uniform mixing;

[0006] In the existing internal mixer during feeding, the raw materials are directly introduced into the pressing chamber through the feeding tube, and then the raw materials freely fall into the mixing chamber. Since the falling paths of the raw materials are the same, the positions where the raw materials fall into the mixing chamber are the same. Therefore, the raw materials falling into the mixing chamber will be unevenly piled up, thus affecting the mixing effect. Summary of the Invention

[0007] In order to make up for the deficiencies of the prior art and solve the above technical problems, the present invention proposes a feeding system for an internal mixer.

[0008] A feeding system for an internal mixer includes a feeding and pressing device; the feeding and pressing device includes a pressing chamber; a pneumatic system is installed at the top of the pressing chamber; a pull rod is installed at the top of the pressing chamber, and the pull rod is driven by the pneumatic system;

[0009] The pull rod extends into the pressing chamber; an upper plug is installed at the bottom of the pull rod;

[0010] The outer circumferential surface of the pressing chamber is cylindrical; the inner cavity of the pressing chamber is rectangular, and the upper plug fits with the inner cavity of the pressing chamber;

[0011] A feeding tube is provided on the outer circumference of the pressing chamber, and the bottom of the feeding tube is flush with the bottom of the pressing chamber; a top plate is fixedly connected to the top of the feeding tube, and the other side of the top plate is fixedly connected to the pressing chamber; the annular cavity between the feeding tube and the pressing chamber is a feeding cavity;

[0012] A first ring plate is rotatably connected in the blanking cavity, and the first ring plate is located below the top plate; uniformly arranged teeth are installed on the top end face of the first ring plate;

[0013] A servo motor is installed on the outer circumferential surface of the barrel, a gear is installed on the output shaft of the servo motor, and the gear passes through the top plate and meshes with the teeth;

[0014] A feed pipe is installed on the side wall of the barrel, and the feed pipe is communicated with the blanking cavity;

[0015] A material guiding component is arranged in the blanking cavity, and the material guiding component is used for guiding raw materials into the internal mixer chamber;

[0016] Preferably, the material guiding component includes a second ring plate; the second ring plate is located below the first ring plate and rotates in the blanking cavity;

[0017] Uniformly arranged connecting rods are fixedly connected to the top end face of the first ring plate, and the other ends of the connecting rods are fixedly connected to the bottom end face of the first ring plate;

[0018] A spiral blade is fixedly connected to the bottom of the second ring plate, and the spiral blade is located in the blanking cavity and spirals downward around the pressing chamber.

[0019] Preferably, the connecting rod includes an inner rod and an outer rod; a sliding groove is formed in the outer rod, and the inner rod slides in the sliding groove;

[0020] The inner rod cannot completely slide out of the sliding groove. In the initial state, the connecting rod extends to the limit position; the outer rod is fixedly connected to the upper surface of the second ring plate; the inner rod is fixedly connected to the bottom end face of the first ring plate;

[0021] A moving block is fixedly connected to one side of the outer rod close to the side wall of the barrel, and the bottom end face of the moving block is an arc surface; uniformly arranged fixing blocks are fixedly connected to the side wall of the barrel, the number of the fixing blocks is the same as that of the moving blocks, and they are arranged at equal intervals;

[0022] The end face of the fixing block facing the moving block is an arc surface; the second ring plate can slide up and down in the blanking cavity;

[0023] Preferably, a spring is fixedly connected to the bottom of the inner rod, and the other end of the spring is fixedly connected in the sliding groove.

[0024] Preferably, a third ring plate is slidably connected to the bottom position of the blanking cavity, and the third ring plate is inclined toward the pressing chamber and is sealed with the bottom of the blanking cavity;

[0025] A material guiding cylinder is fixedly installed at the bottom of the barrel; uniformly arranged electric push rods are fixedly connected to the bottom of the third ring plate, and the electric push rods are installed on the material guiding cylinder;

[0026] Preferably, a push plate is fixedly installed at the end position of the spiral blade;

[0027] Preferably, a slideway is formed in the push plate; an extension plate is slidably connected in the slideway, and the bottom surface of the extension plate is attached to the upper surface of the third ring plate.

[0028] Preferably, at the bottom position of the material pressing chamber, baffles are rotatably connected to both sides of the inner cavity of the material pressing chamber through torsion springs, and in the initial state, the baffles are attached to the bottom end surface of the material pressing chamber and seal the inner cavity of the material pressing chamber;

[0029] Preferably, heat-resistant rubber is coated on the outer surfaces of the two baffles.

[0030] The beneficial effects of the present invention are as follows:

[0031] 1. For the internal mixer feeding system of the present invention, when the added raw materials roll to the end position of the spiral blade in sequence, at this time, the raw materials will gradually fall from the spiral blade. Since the spiral blade rotates around the material pressing chamber in a cycle, during the process of the raw materials falling from the spiral blade, at this time, the spiral blade rotates around the material pressing chamber while the raw materials fall from the spiral blade. During this process, the raw materials can follow a circular movement trajectory with the spiral blade and gradually fall downward, thereby changing the falling path of the raw materials and changing the falling position of the raw materials, thus avoiding the situation that the raw materials fall into the internal mixer at the same position, resulting in uneven accumulation of the raw materials and affecting the mixing effect.

[0032] 2. For the internal mixer feeding system of the present invention, when the existing raw materials are added, the raw materials will fall into the internal mixer through the material pressing chamber. When this feeding and material pressing device feeds materials, the raw materials fall into the internal mixer through the feeding cavity, thereby separating the upper plug, the pull rod from the falling raw materials. Since the raw materials are powder materials, it is avoided that when the upper plug moves down to the lower part of the feeding pipe, the diffused raw materials will adhere to the pull rod and the top position of the upper plug. When the pull rod moves up and disengages from the material pressing chamber, the raw materials adhering to the pull rod will diffuse into the external environment, thus polluting the on-site environment.

[0033] 3. For the internal mixer feeding system of the present invention, during the process of adding raw materials, control the electric push rod to contract, which will drive the third ring plate to move down. When the third ring plate gradually moves away from the bottom of the material pressing chamber, at this time, the gap between the third ring plate and the material pressing chamber gradually increases. Therefore, the falling raw materials will fall from the gap between the third ring plate and the material pressing chamber. During this process, the gap between the third ring plate and the material pressing chamber can be adjusted according to different raw materials, thereby adjusting the amount of raw materials falling downward and avoiding the situation that the feeding amount of the raw materials cannot be controlled, resulting in all the raw materials falling into the internal mixer at one time and causing the raw materials to accumulate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] Figure 1 is a perspective view of the feeding and pressing device of the present invention;

[0036] Figure 2 is an internal structure diagram of the feeding and pressing device of the present invention;

[0037] Figure 3 is an exploded view of the feeding and pressing device in the present invention;

[0038] Figure 4 is a structure diagram of the connecting rod, moving block and fixed block in the present invention;

[0039] Figure 5 is a top view of the present invention;

[0040] Figure 6 is the present invention Figure 5 a cross-sectional view taken along line A-A in;

[0041] Figure 7 is the present invention Figure 6 a partially enlarged view at position B in;

[0042] Figure 8 is the present invention Figure 6 a partially enlarged view at position C in.

[0043] In the figure:

[0044] 1. Pressing chamber; 11. Pull rod; 12. Upper plug; 13. Baffle; 2. Barrel; 21. Top plate; 22. Feeding cavity; 23. First ring plate; 24. Teeth; 25. Servo motor; 26. Gear; 27. Feeding pipe; 3. Second ring plate; 31. Connecting rod; 32. Inner rod; 33. Outer rod; 34. Spiral piece; 35. Moving block; 36. Fixed block; 4. Third ring plate; 41. Guide barrel; 42. Pusher plate; 43. Slideway; 44. Extension plate; 45. Electric push rod. Detailed implementation manners

[0045] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0046] Embodiment 1:

[0047] As Figures 1 to 8 shown, a kneader feeding system according to the present invention; includes a feeding and pressing device; the feeding and pressing device includes a pressing chamber 1; a pneumatic system is installed on the top of the pressing chamber 1; a pull rod 11 is installed on the top of the pressing chamber 1, and the pull rod 11 is driven by the pneumatic system;

[0048] The pull rod 11 extends into the blanking chamber 1; a top bolt 12 is installed at the bottom of the pull rod 11;

[0049] The outer circumferential surface of the blanking chamber 1 is cylindrical; the inner cavity of the blanking chamber 1 is rectangular, and the top bolt 12 fits with the inner cavity of the blanking bin;

[0050] A material cylinder 2 is provided on the outer circumference of the blanking chamber 1, and the bottom of the material cylinder 2 is flush with the bottom of the blanking chamber 1; a top plate 21 is fixedly connected to the top of the material cylinder 2, and the other side of the top plate 21 is fixedly connected to the blanking chamber 1; the annular cavity between the material cylinder 2 and the blanking chamber 1 is a blanking cavity 22;

[0051] A first ring plate 23 is rotatably connected in the blanking cavity 22, and the first ring plate 23 is located below the top plate 21; uniformly arranged gear teeth 24 are installed on the top end face of the first ring plate 23;

[0052] A servo motor 25 is installed on the outer circumferential surface of the material cylinder 2, a gear 26 is installed on the output shaft of the servo motor 25, and the gear 26 passes through the top plate 21 and meshes with the gear teeth 24;

[0053] A feed pipe 27 is installed on the side wall of the material cylinder 2, and the feed pipe 27 communicates with the blanking cavity 22;

[0054] A material guiding component is arranged in the blanking cavity 22, and the material guiding component is used to guide the raw materials into the internal mixer;

[0055] In this embodiment, the material guiding component includes a second ring plate 3; the second ring plate 3 is located below the first ring plate 23 and rotates in the blanking cavity 22;

[0056] Uniformly arranged connecting rods 31 are fixedly connected to the top end face of the first ring plate 23, and the other ends of the connecting rods 31 are fixedly connected to the bottom end face of the first ring plate 23;

[0057] A spiral blade 34 is fixedly connected to the bottom of the second ring plate 3, and the spiral blade 34 is located in the blanking cavity 22 and spirals downward around the blanking chamber 1;

[0058] Specifically, when kneading the raw materials, first start the servo motor 25. The servo motor 25 drives the gear 26 to rotate. Since the gear 26 meshes with the gear teeth 24, it drives the gear teeth 24 and the first ring plate 23 to rotate circularly in the blanking chamber 22. Since the second ring plate 3 is fixedly connected to the first ring plate 23 through the connecting rod 31, during the rotation of the first ring plate 23, the second ring plate 3 is driven to rotate circularly in the blanking chamber 22 through the connecting rod 31. At the same time, the second ring plate 3 drives the spiral blade 34 to rotate circularly in the blanking chamber 22. Subsequently, the staff batches different raw materials into the blanking chamber 22 through the feed pipe 27. When the raw materials enter the blanking chamber 22, the raw materials will fall on the circularly rotating spiral blade 34. At this time, the raw materials will move along with the spiral blade 34 and roll down along the spiral blade 34. When two or more raw materials are added, during the process of the multiple raw materials rolling down from top to bottom on the spiral blade 34, the different raw materials will be mixed with each other, so that two or more raw materials added simultaneously can be premixed. When the raw materials roll to the end of the spiral blade 34, the raw materials will drop from the spiral blade 34 in sequence;

[0059] More specifically, when the added raw materials roll to the end position of the spiral blade 34 in sequence, the raw materials will gradually drop from the spiral blade 34. Since the spiral blade 34 rotates circularly around the pressure chamber 1, during the process of the raw materials dropping from the spiral blade 34, the spiral blade 34 rotates around the pressure chamber 1 while the raw materials drop from the spiral blade 34. During this process, the raw materials can follow the spiral blade 34 and gradually drop along a circular movement trajectory, so as to change the falling path of the raw materials and the dropping position of the raw materials, thus avoiding the situation that the raw materials fall into the same position in the internal mixer, resulting in uneven agglomeration of the raw materials and affecting the kneading effect;

[0060] Furthermore, when the raw materials fall into the internal mixer, the pneumatic system controls the pull rod 11 to move downward, which drives the upper plug 12 to move downward in the pressure chamber 1. When the plug moves into the internal mixer, the upper plug 12 can press the raw materials above the rotor in the internal mixer. After the pressing is completed, the pull rod 11 drives the upper plug 12 to move up to the initial position;

[0061] Even further, when the existing raw materials are added, the raw materials will fall into the internal mixer through the pressure chamber 1. When this feeding and pressing device feeds materials, the raw materials fall into the internal mixer through the blanking chamber 22, so that the upper plug 12, the pull rod 11 can be separated from the falling raw materials. Since the raw materials are powder materials, it is avoided that when the upper plug 12 moves down to the lower part of the feed pipe 27, the diffused raw materials will adhere to the top positions of the pull rod 11 and the upper plug 12. When the pull rod 11 moves up and disengages from the pressure chamber 1, the raw materials adhering to the pull rod 11 will diffuse into the external environment, thus polluting the on-site environment.

[0062] Embodiment 2:

[0063] The connecting rod 31 includes an inner rod 32 and an outer rod 33; a chute is provided inside the outer rod 33, and the inner rod 32 slides inside the chute;

[0064] The inner rod 32 cannot completely slide out of the chute. In the initial state, the connecting rod 31 extends to the limit position; the outer rod 33 is fixedly connected to the upper surface of the second ring plate 3; the inner rod 32 is fixedly connected to the bottom end surface of the first ring plate 23;

[0065] A moving block 35 is fixedly connected to one side of the outer rod 33 close to the side wall of the barrel 2, and the bottom end surface of the moving block 35 is an arc surface; uniformly arranged fixing blocks 36 are fixedly connected to the side wall of the barrel 2, and the number of the fixing blocks 36 is the same as that of the moving blocks 35 and they are arranged at equal intervals;

[0066] The end surface of the fixing block 36 facing the moving block 35 is an arc surface; the second ring plate 3 can slide up and down in the blanking cavity 22;

[0067] In this embodiment, a spring is fixedly connected to the bottom of the inner rod 32, and the other end of the spring is fixedly connected inside the chute;

[0068] Specifically, when the first ring plate 23 drives the second ring plate 3 to rotate through the connecting rod 31, at this time the outer rod 33 will drive the moving block 35 to rotate in a cycle. When the moving block 35 moves to the position of the fixing block 36, at this time the arc surface at the bottom of the moving block 35 will contact the arc surface on the fixing block 36. As the moving block 35 continues to move, the moving block 35 will move to a position above the fixing block 36, and at the same time will drive the outer rod 33 to move upward. During the upward movement of the outer rod 33, the spring inside the chute will be compressed. The upward-moving outer rod 33 will drive the second ring plate 3 and the spiral blade 34 to move upward. When the moving block 35 passes the fixing block 36, at this time it will fall downward under the gravity of the second ring plate 3 and the spiral blade 34, and at the same time the compressed spring will push the outer rod 33 to move downward, thereby pushing the second ring plate 3 and the spiral blade 34 to move downward, so that the spiral blade 34 can vibrate. When the spiral blade 34 vibrates, the raw materials on the spiral blade 34 will jump. During this process, the raw materials can impact on the spiral blade 34, thereby breaking the agglomerated raw materials and improving the mixing efficiency of the raw materials in the internal mixer.

[0069] Embodiment 3:

[0070] A third ring plate 4 is slidably connected to the bottom position of the blanking cavity 22, and the third ring plate 4 is inclined toward the pressure chamber 1 and is sealed with the bottom of the blanking cavity 22;

[0071] A guide cylinder 41 is fixedly installed at the bottom of the barrel 2; uniformly arranged electric push rods 45 are fixedly connected to the bottom of the third ring plate 4, and the electric push rods 45 are installed on the guide cylinder 41;

[0072] In this embodiment, a push plate 42 is fixedly installed at the end position of the spiral piece 34;

[0073] In this embodiment, a slideway 43 is formed in the push plate 42; an extension plate 44 is slidably connected in the slideway 43, and the bottom surface of the extension plate 44 is attached to the upper surface of the third ring plate 4;

[0074] Specifically, during the process of adding raw materials, the electric push rod 45 is controlled to contract, which will drive the third ring plate 4 to move downward. When the third ring plate 4 gradually moves away from the bottom of the material pressing chamber 1, the gap between the third ring plate 4 and the material pressing chamber 1 gradually increases. Therefore, the falling raw materials will fall from the gap between the third ring plate 4 and the material pressing chamber 1. During this process, the gap between the third ring plate 4 and the material pressing chamber 1 can be adjusted according to different raw materials, so as to adjust the amount of raw materials falling downward, avoid the uncontrollable feeding amount of raw materials, and prevent all the raw materials from falling into the internal mixer at one time, resulting in the accumulation of raw materials;

[0075] More specifically, since the bottom of the spiral piece 34 is fixedly connected with the push plate 42, and the extension plate 44 is slidably connected in the push plate 42, when the third ring plate 4 moves downward, the extension plate 44 will slide out of the slideway 43 under the action of its own gravity and fit with the third ring plate 4. Therefore, the extension plate 44 will rotate cyclically following the spiral piece 34. During the rotation process, the surface of the third ring plate 4 can be scraped, so as to push the raw materials falling on the third ring plate 4 to fall, and at the same time, it can prevent some raw materials from accumulating on the third ring plate 4 and not entering the internal mixer.

[0076] Embodiment Four:

[0077] At the bottom position of the material pressing chamber 1, baffles 13 are rotatably connected to both sides of the inner cavity of the material pressing chamber 1 through torsion springs, and in the initial state, the baffles 13 are attached to the bottom end face of the material pressing chamber 1 and seal the inner cavity of the material pressing chamber 1;

[0078] In this embodiment, heat-resistant rubber is coated on the outer surfaces of the two baffles 13.

[0079] Specifically, since the baffles 13 provided at the bottom of the material pressing chamber 1 seal the inner cavity of the material pressing chamber 1 in the initial state, when the internal mixer is mixing raw materials, the baffles 13 can block the raw materials diffused in the internal mixer, thus preventing the raw materials stirred by the rotor and generating dust from diffusing into the internal of the material pressing chamber 1;

[0080] When the upper plug 12 extends into the internal mixer chamber, as the upper plug 12 passes the position of the baffle 13, it will push the baffle 13 to gradually open. After the upper plug 12 moves into the internal mixer chamber, at this time the baffle 13 will fit with the upper plug 12. After the upper plug 12 moves upward, the baffle 13 gradually rotates to the initial position; since the outer surface of the baffle 13 is coated with heat-resistant rubber, the sealing effect on the bottom opening of the pressure chamber 1 can be improved.

[0081] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the Figure 1 orientation or positional relationship shown, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the protection scope of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0082] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A feeding system for an internal mixer, comprising a feeding and pressing device; the feeding and pressing device comprises a pressing chamber (1); a pneumatic system is installed on the top of the pressing chamber (1); a pull rod (11) is installed on the top of the pressing chamber (1), and the pull rod (11) is driven by the pneumatic system; The pull rod (11) extends into the interior of the material pressing chamber (1); an upper push bolt (12) is installed at the bottom of the pull rod (11); It is characterized in that The outer ring surface of the pressing chamber (1) is cylindrical; the inner cavity of the pressing chamber (1) is rectangular, and the upper push bolt (12) fits in the inner cavity of the pressing chamber; The outer ring of the material pressing chamber (1) is provided with a barrel (2), and the bottom of the barrel (2) is flush with the bottom of the material pressing chamber (1); the top of the barrel (2) is fixedly connected to a top plate (21), and the other side of the top plate (21) is fixedly connected to the material pressing chamber (1); the annular cavity between the barrel (2) and the material pressing chamber (1) is a lower cavity (22); A first ring plate (23) is rotatably connected in the material discharge cavity (22), and the first ring plate (23) is located below the top plate (21); the top end surface of the first ring plate (23) is provided with evenly arranged gear teeth (24); A servo motor (25) is mounted on the outer ring surface of the barrel (2), and a gear (26) is mounted on the output shaft of the servo motor (25), and the gear (26) passes through the top plate (21) and meshes with the gear teeth (24); A feed pipe (27) is installed on the side wall of the barrel (2), and the feed pipe (27) is connected to the feed chamber (22); The material discharge chamber (22) is provided with a material guide component, and the material guide component is used to guide the raw materials into the mixing chamber; The material guiding assembly comprises a second ring plate (3); the second ring plate (3) is located below the first ring plate (23) and rotates in the material discharge cavity (22); The top end surface of the first ring plate (23) is fixedly connected with evenly arranged connecting rods (31), and the other end of the connecting rods (31) is fixedly connected to the bottom end surface of the first ring plate (23); A spiral sheet (34) is fixedly connected to the bottom of the second ring plate (3), and the spiral sheet (34) is located in the material discharge cavity (22) and spirals downward around the material pressing chamber (1); The connecting rod (31) comprises an inner rod (32) and an outer rod (33); a slide groove is provided in the outer rod (33), and the inner rod (32) slides in the slide groove; The inner rod (32) cannot completely slide out of the slide groove, and the connecting rod (31) is extended to the limit position in the initial state; the outer rod (33) is fixedly connected to the upper surface of the second ring plate (3); the inner rod (32) is fixedly connected to the bottom end surface of the first ring plate (23); A moving block (35) is fixedly connected to one side of the outer rod (33) close to the side wall of the barrel (2), and the bottom end surface of the moving block (35) is an arc surface; fixed blocks (36) are evenly arranged on the side wall of the barrel (2), and the number of the fixed blocks (36) is the same as the number of the moving blocks (35), and they are arranged at equal distances; The end surface of one side of the fixed block (36) facing the movable block (35) is an arc surface; the second ring plate (3) slides up and down in the material discharge cavity (22); A spring is fixedly connected to the bottom of the inner rod (32), and the other end of the spring is fixedly connected to the slide groove.

2. The internal mixer feeding system according to claim 1, characterized in that: A third ring plate (4) is slidably connected to the bottom of the material discharge chamber (22), and the third ring plate (4) is inclined toward one side of the material pressing chamber (1) and is sealed with the bottom of the material discharge chamber (22); A material guide barrel (41) is fixedly mounted on the bottom of the material barrel (2); evenly arranged electric push rods (45) are fixedly connected to the bottom of the third ring plate (4), and the electric push rods (45) are mounted on the material guide barrel (41).

3. A feeding system for an internal mixer according to claim 2, characterized in that: A push plate (42) is fixedly mounted at the end of the spiral sheet (34).

4. A feeding system for an internal mixer according to claim 3, characterized in that: A slideway (43) is provided in the push plate (42); an extension plate (44) is slidably connected in the slideway (43), and the bottom of the extension plate (44) is in contact with the upper surface of the third ring plate (4).

5. The internal mixer feeding system according to claim 4, characterized in that: At the bottom of the material pressing chamber (1), baffles (13) are rotatably connected on both sides of the inner cavity of the material pressing chamber (1) via torsion springs, and in the initial state, the baffles (13) fit the bottom end surface of the material pressing chamber (1) and seal the inner cavity of the material pressing chamber (1).

6. A feeding system for an internal mixer according to claim 5, characterized in that: The outer ring surfaces of the two baffles (13) are coated with heat-resistant rubber.

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