Feeding system of internal mixer

Abstract

The invention belongs to the technical field of feeding, and particularly relates to an internal mixer feeding system which comprises a feeding and pressing device. The feeding and pressing device comprises a pressing chamber; an air pressure system is mounted at the top of the material pressing chamber; a pull rod is mounted at the top of the pressing chamber; the pull rod extends into the material pressing chamber; an upper top bolt is mounted at the bottom of the pull rod; the outer ring surface of the material pressing chamber is cylindrical; an inner cavity of the material pressing chamber is rectangular; a charging barrel is arranged on the outer ring of the material pressing chamber; the top of the charging barrel is fixedly connected with a top plate; an annular cavity between the charging barrel and the pressing chamber is a blanking cavity; a first annular plate is rotationally connected into the discharging cavity. A feeding pipe is mounted on the side wall of the charging barrel; a material guiding assembly is arranged in the discharging cavity. The internal mixer is mainly used for solving the problem that when an existing internal mixer is used for feeding, raw materials are directly guided into a material pressing chamber through a discharging barrel, and consequently the raw materials falling into an internal mixing chamber are stacked unevenly.

Description

Technical Field

[0001] The invention belongs to the technical field of feeding, in particular to a feeding system for an internal mixer. Background Art

[0002] Internal mixer is a kind of mechanical equipment commonly used in rubber industry for mixing rubber. Mixing is an important process in the production of rubber products. The process can evenly mix rubber raw materials and other additives of different properties to improve the product's wear resistance, high temperature resistance and lifespan. The internal mixer usually consists of a feeding and pressing device, a mixing chamber, a rotor, an upper push bolt, a lower push bolt, a heating and cooling system, a transmission system, a lubrication system, a control system and other parts.

[0003] Its working principle is to add raw rubber and various compounding agents into the mixing chamber, and use two relatively rotating rotors to strongly shear, extrude and stir the materials, so that the materials can be evenly mixed and plasticized in a short time.

[0004] When mixing the raw materials in the internal mixer, first add the rubber and additives into the internal mixer one by one, add the rubber first, and then add the additives in batches to ensure uniform mixing; When feeding, the existing internal mixer directly introduces the raw materials into the pressing chamber through the discharge barrel, and then the raw materials fall freely into the internal mixer. Since the falling paths of the raw materials are the same, the positions of the raw materials falling into the internal mixer are the same. Therefore, the raw materials falling into the internal mixer will be unevenly clustered, which affects the mixing effect. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a feeding system for an internal mixer.

[0006] A feeding system for an internal mixer comprises a feeding and pressing device; the feeding and pressing device comprises a pressing chamber; a pneumatic system is installed on the top of the pressing chamber; a pull rod is installed on the top of the pressing chamber, and the pull rod is driven by the pneumatic system; The pull rod extends to the inside of the press chamber; an upper push bolt is installed at the bottom of the pull rod; The outer ring surface of the material pressing chamber is cylindrical; the inner cavity of the material pressing chamber is rectangular, and the upper push bolt fits with the inner cavity of the material pressing chamber; The outer ring of the material pressing chamber is provided with a barrel, and the bottom of the barrel is flush with the bottom of the material pressing chamber; the top of the barrel is fixedly connected with a top plate, and the other side of the top plate is fixedly connected to the material pressing chamber; the annular cavity between the barrel and the material pressing chamber is a material discharge cavity; A first ring plate is rotatably connected in the material discharge cavity, and the first ring plate is located below the top plate; the top end surface of the first ring plate is equipped with evenly arranged gear teeth; A servo motor is installed on the outer ring surface of the barrel, and a gear is installed on the output shaft of the servo motor, and the gear passes through the top plate and meshes with the gear teeth; A feed pipe is installed on the side wall of the barrel, and the feed pipe is connected with the feed cavity; A material guide component is provided in the material discharge chamber, and the material guide component is used to guide the raw materials into the mixing chamber; Preferably, the material guiding assembly comprises a second ring plate; the second ring plate is located below the first ring plate and rotates in the material discharge cavity; The top end surface of the first ring plate is fixedly connected with evenly arranged connecting rods, and the other end of the connecting rod is fixedly connected to the bottom end surface of the first ring plate; A spiral sheet is fixedly connected to the bottom of the second ring plate, and the spiral sheet is located in the material discharge cavity and spirals downward around the material pressing chamber.

[0007] Preferably, the connecting rod comprises an inner rod and an outer rod; a slide groove is provided in the outer rod, and the inner rod slides in the slide groove; The inner rod cannot completely slide out of the slide slot, and the connecting rod is extended to the limit position in the initial state; 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 surface of the first ring plate; 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 surface of the moving block is an arc surface; fixed blocks arranged evenly are fixedly connected to the side wall of the barrel, and the number of the fixed blocks is the same as the number of the moving blocks, and they are arranged equidistantly; The end surface of the fixed block facing the movable block is an arc surface; the second ring plate can slide up and down in the material discharge cavity; Preferably, a spring is fixedly connected to the bottom of the inner rod, and the other end of the spring is fixedly connected to the slide groove.

[0008] Preferably, a third ring plate is slidably connected to the bottom of the material discharge chamber, and the third ring plate is inclined toward one side of the material pressing chamber and is sealed with the bottom of the material discharge chamber; A material guide barrel is fixedly installed at the bottom of the barrel; evenly 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 guide barrel; Preferably, a push plate is fixedly installed at the end of the spiral sheet; Preferably, a slideway is provided in the push plate; an extension plate is slidably connected in the slideway, and the bottom of the extension plate is in contact with the upper surface of the third ring plate.

[0009] Preferably, the bottom position of the material pressing chamber is located at both sides of the inner cavity of the material pressing chamber and is rotatably connected with baffles through torsion springs, and the baffles are in contact with the bottom end surface of the material pressing chamber in the initial state and seal the inner cavity of the material pressing chamber; Preferably, the outer ring surfaces of the two baffles are coated with heat-resistant rubber.

[0010] The beneficial effects of the present invention are as follows: 1. In the feeding system of an internal mixer described in the present invention, when the added raw materials roll down to the end position of the spiral piece in sequence, the raw materials will gradually fall from the spiral piece. Since the spiral piece rotates cyclically around the pressing chamber, during the process of the raw materials falling from the spiral piece, the spiral piece rotates around the pressing chamber while the raw materials fall from the spiral piece. In this process, the raw materials can follow the circular motion trajectory of the spiral piece and gradually fall downward, thereby changing the path of the raw materials falling and changing the position of the raw materials falling, thereby avoiding the situation where the raw materials fall into the same position in the internal mixing chamber, causing uneven piling of the raw materials, thereby affecting the mixing effect.

[0011] 2. In the feeding system of an internal mixer described in the present invention, when existing raw materials are added, the raw materials will fall into the internal mixing chamber through the pressing chamber. When the feeding and pressing device is feeding, the raw materials will fall into the internal mixing chamber through the lower cavity, so that the upper push bolt and the pull rod can be separated from the falling raw materials. Since the raw materials are powder materials, when the upper push bolt moves down to the bottom of the feed pipe, the diffused raw materials will not adhere to the pull rod and the top position of the upper push bolt. When the pull rod moves up and detaches from the pressing chamber, the raw materials adhered to the pull rod will diffuse into the external environment, thereby polluting the on-site environment.

[0012] 3. The feeding system of an internal mixer described in the present invention controls the electric push rod to contract during the process of adding raw materials, thereby driving the third ring plate to move downward. When the third ring plate gradually moves away from the bottom of the pressing chamber, the gap between the third ring plate and the pressing chamber gradually increases. Therefore, the falling raw materials will fall from the gap between the third ring plate and the pressing chamber. In this process, the gap between the third ring plate and the pressing chamber can be adjusted according to different raw materials, so that the amount of raw materials falling downward can be adjusted, thereby avoiding the uncontrollable feeding amount of raw materials, so that the raw materials fall into the internal mixer at one time, causing the raw materials to accumulate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a three-dimensional diagram of the feeding and pressing device of the present invention; Figure 2 It is the internal structure diagram of the feeding and pressing device of the present invention; Figure 3 It is an exploded view of the feeding and pressing device in the present invention; Figure 4 It is a structural diagram of the connecting rod, the moving block and the fixed block in the present invention; Figure 5 It is a top view of the present invention; Figure 6 The present invention Figure 5 Sectional view at AA; Figure 7 The present invention Figure 6 A partial enlarged view of point B in the middle; Figure 8 The present invention Figure 6 A partial enlarged view of point C in the middle.

[0015] In the figure: 1. Pressing chamber; 11. Pull rod; 12. Upper push bolt; 13. Baffle; 2. Material barrel; 21. Top plate; 22. Lower material chamber; 23. First ring plate; 24. Gear; 25. Servo motor; 26. Gear; 27. Feed pipe; 3. Second ring plate; 31. Connecting rod; 32. Inner rod; 33. Outer rod; 34. Spiral sheet; 35. Moving block; 36. Fixed block; 4. Third ring plate; 41. Material guide barrel; 42. Push plate; 43. Slideway; 44. Extension plate; 45. Electric push rod. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0017] Embodiment 1: like Figures 1 to 8 As shown, a feeding system of an internal mixer according to the present invention comprises 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 to the inside of the pressing chamber 1; an upper push bolt 12 is installed at the bottom of the pull rod 11; 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 with the inner cavity of the pressing chamber; The outer ring of the pressing chamber 1 is provided with a barrel 2, and the bottom of the barrel 2 is flush with the bottom of the pressing chamber 1; the top of the barrel 2 is fixedly connected with a top plate 21, and the other side of the top plate 21 is fixedly connected to the pressing chamber 1; the annular cavity between the barrel 2 and the 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 assembly, and the material guide assembly is used to guide the raw materials into the mixing chamber; In this embodiment, the material guiding assembly includes 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 to evenly arranged connecting rods 31, and the other end of the connecting rod 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; Specifically, when the raw materials are mixed, the servo motor 25 is first started, and the servo motor 25 drives the gear 26 to rotate. Since the gear 26 is meshed with the gear 24, the gear 24 and the first ring plate 23 are driven to circulate and rotate in the material discharge chamber 22. Since the second ring plate 3 is fixedly connected to the first ring plate 23 by the connecting rod 31, during the rotation of the first ring plate 23, the second ring plate 3 is driven to circulate and rotate in the material discharge chamber 22 through the connecting rod 31. At the same time, the second ring plate 3 drives the spiral sheet 34 to circulate and rotate in the material discharge chamber 22. Then the staff will batch the raw materials. The raw materials are introduced into the feeding chamber 22 through the feeding pipe 27. When the raw materials enter the feeding chamber 22, they will fall on the spiral slices 34 that rotate in a circular motion. At this time, the raw materials will move with the spiral slices 34 and roll down along the spiral slices 34. When two or more raw materials are added, different raw materials will mix with each other during the process of rolling down from top to bottom on the spiral slices 34. Thus, the two or more raw materials added at the same time can be mixed in advance. When the raw materials roll to the end of the spiral slices 34, the raw materials will fall from the spiral slices 34 one by one. More specifically, when the added raw materials roll down to the end position of the spiral piece 34 in sequence, the raw materials will gradually fall from the spiral piece 34. Since the spiral piece 34 is cyclically rotating around the pressing chamber 1, in the process of the raw materials falling from the spiral piece 34, the spiral piece 34 rotates around the pressing chamber 1 while the raw materials fall from the spiral piece 34. In this process, the raw materials can follow the circular motion trajectory of the spiral piece 34 and gradually fall downward, thereby changing the path of the raw materials falling and changing the position of the raw materials falling, thereby avoiding the raw materials falling into the same position in the mixing chamber, causing the raw materials to pile up unevenly, thereby affecting the mixing effect; Furthermore, when the raw material falls into the mixing chamber, the air pressure system controls the pull rod 11 to move downward, thereby driving the upper push bolt 12 to move downward in the pressing chamber 1. When the push bolt moves into the mixing chamber, the upper push bolt 12 can press the raw material above the rotor in the mixing chamber. When the pressing is completed, the pull rod 11 drives the upper push bolt 12 to move upward to the initial position. Furthermore, when the existing raw materials are added, the raw materials will fall into the mixing chamber through the pressing chamber 1. When the feeding and pressing device is feeding, the raw materials will fall into the mixing chamber through the lower cavity 22, so that the upper push bolt 12 and the pull rod 11 can be separated from the falling raw materials. Since the raw materials are powder materials, when the upper push bolt 12 moves down to the bottom of the feed pipe 27, the diffused raw materials will not adhere to the pull rod 11 and the top position of the upper push bolt 12. When the pull rod 11 moves up and detaches from the pressing chamber 1, the raw materials adhered to the pull rod 11 will diffuse into the external environment, thereby polluting the on-site environment.

[0018] Embodiment 2: The connecting rod 31 includes 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 slot, 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 33 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 equidistantly arranged; The end surface of the fixed block 36 facing the movable block 35 is an arc surface; the second ring plate 3 can slide up and down in the feeding cavity 22; 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 to the slide groove; Specifically, when the first ring plate 23 drives the second ring plate 3 to rotate through the connecting rod 31, the outer rod 33 will drive the moving block 35 to rotate in a circular manner. When the moving block 35 moves to the position of the fixed block 36, the arc surface at the bottom of the moving block 35 will contact the arc surface on the fixed block 36. As the moving block 35 continues to move, the moving block 35 will move to the position above the fixed block 36, and at the same time, the outer rod 33 will be driven to move upward. During the upward movement of the outer rod 33, the spring in the slide groove will be compressed, and the upward moving outer rod 33 will drive the second ring plate 3 and the spiral The spiral piece 34 moves upward, and when the moving block 35 passes the fixed block 36, it falls downward under the gravity of the second ring plate 3 and the spiral piece 34, and the compressed spring pushes the outer rod 33 to move downward, thereby pushing the second ring plate 3 and the spiral piece 34 to move downward, so that the spiral piece 34 can vibrate. When the spiral piece 34 vibrates, the raw materials on the spiral piece 34 will jump. In this process, the raw materials can hit the spiral piece 34, so that the agglomerated raw materials can be broken, thereby improving the mixing efficiency of the raw materials in the mixing chamber.

[0019] Embodiment three: The bottom of the material discharge chamber 22 is slidably connected with a third ring plate 4, 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 installed at the bottom of the 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 installed on the material guide barrel 41; In this embodiment, a push plate 42 is fixedly installed at the end of the spiral piece 34; In this embodiment, 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; Specifically, during the process of adding raw materials, the electric push rod 45 is controlled to contract, thereby driving the third ring plate 4 to move downward. When the third ring plate 4 gradually moves away from the bottom of the pressing chamber 1, the gap between the third ring plate 4 and the pressing chamber 1 gradually increases, so the falling raw materials will fall from the gap between the third ring plate 4 and the pressing chamber 1. In this process, the gap between the third ring plate 4 and the pressing chamber 1 can be adjusted according to different raw materials, so that the amount of raw materials falling downward can be adjusted to avoid the uncontrollable amount of raw materials, so that the raw materials fall into the mixing chamber at one time, causing the raw materials to pile up; More specifically, since a push plate 42 is fixedly connected to the bottom of the spiral sheet 34, and an extension plate 44 is slidably connected inside the push plate 42, when the third ring plate 4 moves downward, the extension plate 44 slides out of the slideway 43 and fits with the third ring plate 4 under the action of its own gravity. Therefore, the extension plate 44 will rotate in a circle with the spiral sheet 34. During the rotation, the surface of the third ring plate 4 can be scraped, thereby pushing the raw materials that have fallen on the third ring plate 4 to fall off, and at the same time, it can prevent some raw materials from accumulating on the third ring plate 4 and being unable to enter the inner part of the mixing chamber.

[0020] Embodiment 4: 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 through torsion springs, and the baffles 13 are initially fitted to the bottom end surface of the material pressing chamber 1 and seal the inner cavity of the material pressing chamber 1; In this embodiment, the outer circumferential surfaces of the two baffles 13 are coated with heat-resistant rubber.

[0021] Specifically, since the baffle 13 disposed at the bottom of the pressing chamber 1 seals the inner cavity of the pressing chamber 1 in the initial state, when the mixing chamber is mixing raw materials, the baffle 13 can block the raw materials diffused in the mixing chamber, thereby preventing the raw materials stirred by the rotor from generating dust and diffusing into the inside of the pressing chamber 1; When the upper push pin 12 is extending into the mixing chamber, when it passes the position of the baffle 13, it will push the baffle 13 to gradually open. When the upper push pin 12 moves into the mixing chamber, the baffle 13 will fit with the upper push pin 12. When the upper push pin 12 moves up, the baffle 13 gradually rotates to its initial position. Since the outer ring surface of the baffle 13 is coated with heat-resistant rubber, the sealing effect of the bottom opening of the pressing chamber 1 can be improved.

[0022] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached 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).

2. A feeding system for an internal mixer according to claim 1, Features: 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; and the second ring plate (3) can slide up and down in the material discharge cavity (22).

3. A feeding system for an internal mixer according to claim 2, Features: 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.

4. A feeding system for an internal mixer according to claim 3, Features: 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).

5. A feeding system for an internal mixer according to claim 4, Features: A push plate (42) is fixedly mounted at the end of the spiral sheet (34).

6. A feeding system for an internal mixer according to claim 5, Features: 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).

7. A feeding system for an internal mixer according to claim 6, Features: 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).

8. A feeding system for an internal mixer according to claim 7, Features: The outer ring surfaces of the two baffles (13) are coated with heat-resistant rubber.

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