A time-varying controllable screw extruder and speed regulation method thereof

Abstract

The present invention relates to a time-varying controllable screw extruder and a speed regulation method thereof, wherein the time-varying controllable screw extruder comprises a base and a barrel arranged on the base, and further comprises: a cylinder arranged at one end of the barrel for transitionally conveying the raw material extruded by the screw inside the barrel, and an elastic follower mechanism is provided inside the barrel, which is triggered when the pressure inside the barrel changes, and a plurality of movable parts are movably provided on the base through an elastic sliding mechanism, and the plurality of movable parts are equidistantly distributed along the circumference and arranged in an arc shape, and are connected to the screw inside the barrel through a second transmission belt. The present application adopts a mechanical interlocking method to realize the regulation of the screw speed in the barrel. Compared with the existing control system, the present application avoids the problem of poor control performance caused by the high requirements of the sensor on the working environment in the existing control system, and can significantly improve the production effect.

Description

Technical Field

[0001] The present invention relates to the technical field related to screw extrusion tablet presses, in particular to a time-varying controllable screw extrusion tablet press and a speed regulation method thereof. Background Art

[0002] In recent years, with the development of new fields, products, and technologies in synthetic materials and fine chemicals, the demand for specialized or special polymers has increased significantly, leading to the widespread use of twin-screw extruders. Due to their excellent mixing and plasticizing properties, twin-screw extruders are primarily used for polymer modification, such as blending, filling, and reinforcement extrusion. They can also directly extrude products such as sheets, pipes, and profiles. Currently, the global trend for twin-screw extruders is toward higher torque, higher speed, and lower energy consumption.

[0003] The intermittent working mode of the internal mixer and the unique high elasticity of rubber cause the control system of the twin-screw extruder to have complex problems such as nonlinearity and time-varying properties. In order to solve the defects brought by these problems to the traditional twin-screw extruder speed control system, in actual production, it is necessary to set up a complete control system to control the speed of the screw in the extruder to solve the complex problems such as nonlinearity and time-varying properties.

[0004] However, existing control systems generally use sensor components for control, and sensor components have high requirements for the working environment. Therefore, errors are likely to occur during production, resulting in poor production results. Summary of the Invention

[0005] The object of the present invention is to provide a time-varying controllable screw extruder tablet press and a speed regulation method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A time-varying controllable screw extruder tablet press comprises a base and a barrel disposed on the base, and further comprising:

[0008] A cylinder is provided at one end of the cylinder body, and is used for transitionally conveying the raw materials extruded by the screw inside the cylinder body, and an elastic follower mechanism is provided inside the cylinder, and the elastic follower mechanism is triggered when the pressure inside the cylinder changes;

[0009] A plurality of movable parts are movably provided on the base through an elastic sliding mechanism, and the plurality of movable parts are evenly distributed along the circumference and arranged in an arc shape, and are connected to the screw inside the cylinder through a second transmission belt;

[0010] The speed regulating mechanism is installed on the base and is respectively connected to the movable parts and the elastic follower mechanism. When the elastic follower mechanism moves, the speed regulating mechanism will drive the multiple movable parts to perform expansion or contraction actions, so as to increase or decrease the speed of the screw inside the barrel.

[0011] As a further solution of the present invention: the elastic follower mechanism includes a disc sealingly and slidingly arranged in the cylinder and a feeding tube fixed to the disc, one end of the feeding tube passing through the cylinder;

[0012] Among them, two long rods are fixed on the disc, and the long rods pass through the cylinder. A first cylindrical spring is sleeved on the outer circumference of each of the two long rods, and the two ends of the first cylindrical spring are respectively connected to the disc and the cylinder wall of the cylinder.

[0013] As a further solution of the present invention: the elastic sliding mechanism includes two cross bars fixedly mounted on the base via two protruding blocks and a mounting seat slidably arranged on the two cross bars;

[0014] Wherein, a second cylindrical spring is sleeved on the outer circumference of each of the two cross bars, one end of the second cylindrical spring is connected to the protruding block, and the other end is connected to the mounting seat.

[0015] As a further solution of the present invention: a driving motor is installed on the mounting seat, a rotating frame is fixed on the output shaft of the driving motor, and a plurality of strip-shaped protrusions are equidistantly provided on the rotating frame along the circumference, and each sliding sleeve on each of the strip-shaped protrusions is provided with a sleeve plate, and the sleeve plate is fixed to the interior of the movable part and is also connected to the speed regulation mechanism.

[0016] As a further solution of the present invention: the speed regulating mechanism includes a screw rotatably mounted on the base, two guide rods fixedly mounted on the base, and a transverse plate provided on the screw and threadedly connected thereto;

[0017] Among them, the two guide rods both pass through the transverse plate and are slidably connected to the transverse plate. The transverse plate is provided with a push-pull structure connected to the sleeve plate, and one end of the screw rod is connected to the gear transmission assembly installed on the base.

[0018] As a further solution of the present invention: the push-pull structure includes a rotating rod rotatably installed on the upper part of the transverse plate and multiple push-pull rods rotatably installed on one end of the rotating rod toward the movable part. The multiple push-pull rods are evenly distributed along the circumference and are hinged to the sleeve plate at one end away from the rotating rod.

[0019] As a further solution of the present invention: the meshing transmission assembly includes a gear and a transmission shaft rotatably mounted on the base, and the transmission shaft is connected to the rotating shaft of the gear through a first transmission belt, and the transmission shaft is also connected to one end of the screw rod through a bevel gear set, and the gear is engaged with a rack plate fixed to the end of the long rod away from the disc.

[0020] A method for regulating the speed of a screw extruder tablet press with controllable time-varying properties comprises the following steps:

[0021] Step 1: The internal mixer introduces the raw materials into the cylinder, and the rotation of the screw inside the cylinder causes the raw materials to be extruded into the cylinder;

[0022] Step 2: As the raw material enters the cylinder, the pressure inside the cylinder changes, and the elastic follower mechanism is triggered to drive the speed regulating mechanism to move;

[0023] In step three, the speed regulating mechanism moves, driving the plurality of movable parts to perform expansion or contraction movements, so as to increase or decrease the rotation speed of the screw inside the barrel.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the present invention is novel in design. During use, when the material in the barrel is transported into the cylinder, the pressure in the cylinder increases, which will cause the disc to slide in the cylinder in the direction away from the barrel. Accordingly, the long rod gradually moves toward the outside of the cylinder, the first cylindrical spring is compressed, and the movement of the long rod will cause the speed regulating mechanism to move, and make corresponding adjustments to the speed of the screw inside the barrel, thereby realizing the time-varying controllable function of the screw extrusion tablet press. The present application adopts a mechanical interlocking method to realize the adjustment of the speed of the screw in the barrel. Compared with the existing control system, it avoids the problem of poor control performance caused by the high requirements of the sensor on the working environment in the existing control system, can significantly improve the production effect, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a structural schematic diagram of an embodiment of a time-varying controllable screw extruder tablet press.

[0026] Figure 2 The present invention is a schematic structural diagram of another angle of an embodiment of a time-varying controllable screw extruder tablet press.

[0027] Figure 3 The present invention is a structural schematic diagram of another angle of an embodiment of a time-varying controllable screw extruder tablet press.

[0028] Figure 4 for Figure 1 A magnified view of the structure at point A in the middle.

[0029] Figure 5 for Figure 2 A magnified view of the structure at point B.

[0030] Figure 6 for Figure 3 Enlarged view of the structure at point C in the middle.

[0031] Figure 7 The figure is a schematic structural diagram of an elastic follower mechanism in an embodiment of a time-varying controllable screw extruder tablet press.

[0032] Figure 8 The figure is a schematic structural diagram of an elastic sliding mechanism and a speed regulating mechanism in one embodiment of a time-varying controllable screw extruder tablet press.

[0033] In the figure: 1. base; 2. cylinder; 3. cylinder; 301. feed hole; 302. discharge pipe; 4. disc; 401. mounting hole; 5. feed pipe; 6. long rod; 7. first cylindrical spring; 8. rack plate; 9. gear; 10. transmission shaft; 11. first transmission belt; 12. bevel gear set; 13. screw; 14. guide rod; 15. transverse plate; 16. rotating rod; 17. movable part; 18. driving motor; 19. rotating frame; 20. sleeve plate; 21. push-pull rod; 22. protrusion block; 23. cross bar; 24. mounting seat; 25. second cylindrical spring; 26. strip-shaped protrusion; 27. second transmission belt. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0036] See also Figure 1-8 In an embodiment of the present invention, a time-varying controllable screw extruder tablet press comprises a base 1 and a barrel 2 disposed on the base 1, and further comprises:

[0037] The cylinder 3 is provided at one end of the cylinder 2 and is used for transferring the raw materials extruded by the screw inside the cylinder 2. The cylinder 3 is provided with an elastic follower mechanism inside, which is triggered when the pressure inside the cylinder 3 changes;

[0038] A plurality of movable members 17 are movably provided on the base 1 via an elastic sliding mechanism, and the plurality of movable members 17 are evenly distributed along the circumference and arranged in an arc shape, and are connected to the screw inside the barrel 2 via a second transmission belt 27;

[0039] The speed regulating mechanism is installed on the base 1 and is respectively connected to the movable parts 17 and the elastic follower mechanism. When the elastic follower mechanism moves, the speed regulating mechanism will drive the multiple movable parts 17 to perform expansion or contraction actions, so that the speed of the screw inside the barrel 2 increases or decreases.

[0040] It should be noted that the feed port of the barrel 2 is connected to an internal mixer (not shown in the figure), and the cylinder 3 is arranged at the discharge port of the barrel 2.

[0041] Please refer again Figure 7 The elastic follower mechanism includes a disc 4 sealingly and slidingly arranged in the cylinder 3 and a feeding tube 5 fixed to the disc 4, and one end of the feeding tube 5 passes through the cylinder 3;

[0042] Among them, two long rods 6 are fixed on the disc 4, and the long rods 6 pass through the cylinder 3. A first cylindrical spring 7 is respectively sleeved on the outer circumference of the two long rods 6, and the two ends of the first cylindrical spring 7 are respectively connected to the disc 4 and the cylinder wall of the cylinder 3.

[0043] It should be pointed out that a mounting hole 401 is provided on the disc 4, and one end of the feeding tube 5 is fixed in the mounting hole 401. The end of the cylinder 3 facing the barrel 2 is provided with a feed hole 301 connected to the discharge port of the barrel 2, and the aperture of the mounting hole 401 is smaller than the aperture of the feed hole 301. In this way, when the material in the barrel 2 is transported into the barrel 3, the pressure in the barrel 3 increases, which will cause the disc 4 to slide in the barrel 3 in the direction away from the barrel 2. Accordingly, the long rod 6 gradually moves toward the outside of the barrel 3, the first cylindrical spring 7 is compressed, and the movement of the long rod 6 will cause the speed regulating mechanism to move, and the speed of the screw inside the barrel 2 is adjusted accordingly, thereby realizing the time-variable controllable function of the screw extrusion tablet press.

[0044] Secondly, this application adopts a mechanical interlocking method to achieve the adjustment of the screw speed in the barrel 2. Compared with the existing control system, it avoids the problem of poor control performance caused by the high requirements of the working environment of the sensors in the existing control system. It has a significant breakthrough and is suitable for popularization and use.

[0045] It should be further explained that a discharge pipe 302 is fixed to the end of the cylinder 3 away from the cylinder body 2. The discharge pipe 302 and the feed pipe 5 are sealed and slidably fitted together. When the pressure inside the cylinder 3 changes, the feed pipe 5 will move with the disc 4. Accordingly, the feed pipe 5 will slide in the discharge pipe 302 to ensure the normal transportation of the material and facilitate the subsequent tableting.

[0046] Please refer again Figure 6 and Figure 8 The elastic sliding mechanism includes two cross bars 23 fixedly mounted on the base 1 through two protruding blocks 22 and a mounting seat 24 slidably arranged on the two cross bars 23;

[0047] A second cylindrical spring 25 is sleeved on the outer circumference of each of the two cross bars 23 . One end of the second cylindrical spring 25 is connected to the protruding block 22 , and the other end is connected to the mounting seat 24 .

[0048] When the pressure inside the cylinder 3 increases, that is, the disc 4 gradually slides in the cylinder 3 in the direction away from the cylinder body 2, and the first cylindrical spring 7 is compressed, the speed regulating mechanism will drive the multiple movable parts 17 to perform an expansion action. Conversely, when the pressure inside the cylinder 3 decreases, the first cylindrical spring 7 will gradually rebound, so that the disc 4 gradually slides in the cylinder 3 in the direction close to the cylinder body 2, and the speed regulating mechanism drives the multiple movable parts 17 to perform a contraction movement. In the above process, the second cylindrical spring 25 is deformed to ensure that the second transmission belt 27 is always in a taut state, ensuring the effective maintenance of the transmission state.

[0049] A driving motor 18 is mounted on the mounting seat 24, a rotating frame 19 is fixed on the output shaft of the driving motor 18, and a plurality of strip-shaped protrusions 26 are equidistantly provided on the rotating frame 19 along the circumference, and a sleeve 20 is provided on each sliding sleeve of each strip-shaped protrusion 26. The sleeve 20 is fixed to the interior of the movable part 17 and is also connected to the speed regulating mechanism.

[0050] Please refer again Figure 4 The speed regulating mechanism includes a screw rod 13 rotatably mounted on the base 1, two guide rods 14 fixedly mounted on the base 1, and a transverse plate 15 provided on the screw rod 13 and threadedly connected thereto;

[0051] Among them, the two guide rods 14 both pass through the transverse plate 15 and are slidably connected to the transverse plate 15. The transverse plate 15 is provided with a push-pull structure connected to the sleeve plate 20, and one end of the screw rod 13 is connected to the gearing transmission assembly installed on the base 1.

[0052] Specifically, three through holes are provided on the transverse plate 15 , and the three through holes are used for the screw rod 13 and the two guide rods 14 to pass through respectively, and the inner wall of the through hole through which the screw rod 13 passes is provided with a thread engaged with the screw rod 13 .

[0053] The push-pull structure includes a rotating rod 16 rotatably mounted on the upper part of the transverse plate 15 and multiple push-pull rods 21 rotatably mounted on one end of the rotating rod 16 toward the movable part 17. The multiple push-pull rods 21 are evenly distributed along the circumference, and the end away from the rotating rod 16 is hinged to the sleeve plate 20.

[0054] When the pressure in the cylinder 3 increases, the long rod 6 moves toward the outside of the cylinder 3 and causes the gear transmission assembly to move. As a result, the gear transmission assembly drives the screw 13 to rotate in the positive direction. Accordingly, the two guide rods 14 guide the transverse plate 15, so that the transverse plate 15 and the screw 13 are threadedly engaged and move in a direction away from the mounting seat 24. Then, the rotating rod 16 pulls the sleeve plate 20 on the strip-shaped protrusion 26 toward the axis of the rotating frame 19 through the push-pull rod 21, causing the multiple movable parts 17 to contract and the speed of the screw in the cylinder 2 to decrease.

[0055] On the contrary, when the pressure in the cylinder 3 becomes smaller, the meshing transmission assembly will drive the screw 13 to rotate in the opposite direction, so that the transverse plate 15 will move toward the mounting seat 24, and the rotating rod 16 will push the sleeve plate 20 on the strip-shaped protrusion 26 toward the axial direction away from the rotating frame 19 through the push-pull rod 21. Accordingly, the multiple movable parts 17 will perform expansion movement, and the rotation speed of the screw in the cylinder 2 will increase.

[0056] Please refer again Figure 5 The meshing transmission assembly includes a gear 9 and a transmission shaft 10 rotatably mounted on the base 1, and the transmission shaft 10 is connected to the rotating shaft of the gear 9 through a first transmission belt 11. The transmission shaft 10 is also connected to one end of the screw rod 13 through a bevel gear set 12. The gear 9 is meshed with a rack plate 8 fixed to the end of the long rod 6 away from the disc 4.

[0057] Specifically, the bevel gear set 12 includes a number one bevel gear fixedly mounted on one end of the transmission shaft 10 and a number two bevel gear fixedly mounted on one end of the screw rod 13 , and the number two bevel gear is meshed with the number one bevel gear.

[0058] When the long rod 6 moves toward the outside of the cylinder 3, it indicates that the pressure inside the cylinder 3 is increasing. Accordingly, the rack plate 8 moves along with the long rod 6 and causes the gear 9 to rotate in the positive direction. The rotating shaft of the gear 9 drives the transmission shaft 10 to rotate through the first transmission belt 11. The transmission shaft 10 drives the screw rod 13 to rotate in the positive direction through the bevel gear set 12, so that the transverse plate 15 and the screw rod 13 are threadedly engaged and move in the direction away from the mounting seat 24. Then, the rotating rod 16 pulls the sleeve plate 20 on the strip-shaped protrusion 26 toward the axis of the rotating frame 19 through the push-pull rod 21, so that the multiple movable parts 17 perform a contraction movement, and the speed of the screw in the cylinder 2 is reduced;

[0059] On the contrary, when the long rod 6 moves toward the inside of the cylinder 3, it indicates that the pressure inside the cylinder 3 is reduced, so that the rack plate 8 moves with the long rod 6 and causes the gear 9 to rotate in the opposite direction. The rotating shaft of the gear 9 drives the transmission shaft 10 to rotate through the first transmission belt 11, and the transmission shaft 10 drives the screw 13 to rotate in the opposite direction through the bevel gear set 12. The transverse plate 15 will move toward the mounting seat 24, and the rotating rod 16 pushes the sleeve plate 20 on the strip-shaped protrusion 26 toward the axial direction away from the rotating frame 19 through the push-pull rod 21. Accordingly, the multiple movable parts 17 perform expansion movement, and the speed of the screw in the cylinder 2 is increased.

[0060] A method for regulating the speed of a screw extruder tablet press with controllable time-varying properties comprises the following steps:

[0061] In step 1, the internal mixer introduces the raw materials into the barrel 2, and the rotation of the screw inside the barrel 2 causes the raw materials to be extruded into the cylinder 3;

[0062] Step 2: As the raw material enters the cylinder 3, the pressure inside the cylinder 3 changes, and the elastic follower mechanism is triggered to drive the speed regulating mechanism to move;

[0063] In step three, the speed regulating mechanism moves, driving the plurality of movable parts 17 to perform expansion or contraction movements, so as to increase or decrease the rotation speed of the screw inside the barrel 2 .

[0064] In general, when the time-varying controllable screw extruder is implemented, when the pressure inside the cylinder 3 increases, that is, the disc 4 gradually slides in the cylinder 3 in the direction away from the cylinder body 2, the first cylindrical spring 7 is compressed, and accordingly, the rack plate 8 moves together with the long rod 6, and causes the gear 9 to rotate forward, and the rotating shaft of the gear 9 drives the transmission shaft 10 to rotate through the first transmission belt 11, and the transmission shaft 10 drives the screw rod 13 to rotate forward through the bevel gear set 12, so that the transverse plate 15 and the screw rod 13 are threadedly engaged and move in the direction away from the mounting seat 24, and then, the rotating rod 16 pulls the sleeve plate 20 on the strip-shaped protrusion 26 toward the axis of the rotating frame 19 through the push-pull rod 21, so that the multiple movable parts 17 perform a contraction movement, and the speed of the screw in the cylinder body 2 is reduced;

[0065] On the contrary, when the pressure inside the cylinder 3 decreases, the first cylindrical spring 7 will gradually rebound, causing the disc 4 to gradually slide in the cylinder 3 toward the cylinder body 2, so that the rack plate 8 moves along with the long rod 6 and causes the gear 9 to rotate in the opposite direction. The rotating shaft of the gear 9 drives the transmission shaft 10 to rotate through the first transmission belt 11, and the transmission shaft 10 drives the screw 13 to rotate in the opposite direction through the bevel gear set 12. The transverse plate 15 will move toward the mounting seat 24, and the rotating rod 16 pushes the sleeve plate 20 on the strip-shaped protrusion 26 toward the axial direction away from the rotating frame 19 through the push-pull rod 21. Accordingly, the multiple movable parts 17 perform an expansion movement, and the speed of the screw in the cylinder body 2 increases.

[0066] During the above process (ie, when the plurality of movable members 17 perform contraction or expansion movements), the second cylindrical spring 25 is deformed to ensure that the second transmission belt 27 is always in a taut state, thereby ensuring that the transmission state is effectively maintained.

[0067] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0068] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A time-varying controllable screw extruder tablet press, comprising a base and a barrel disposed on the base, characterized in that: Also includes: The cylinder is provided at one end of the cylinder body and is used for transferring the raw materials extruded by the screw inside the cylinder body. The cylinder body is provided with an elastic follower mechanism inside, which is triggered when the pressure inside the cylinder changes; A plurality of movable parts are movably provided on the base through an elastic sliding mechanism, and the plurality of movable parts are evenly distributed along the circumference and arranged in an arc shape, and are connected to the screw inside the cylinder through a second transmission belt; The speed regulating mechanism is installed on the base and is connected to the movable parts and the elastic follower mechanism respectively. When the elastic follower mechanism moves, it will prompt the speed regulating mechanism to drive the multiple movable parts to perform expansion or contraction actions, thereby increasing or decreasing the speed of the screw inside the barrel; The elastic follower mechanism includes a disc sealed and slidably arranged in the cylinder and a feeding tube fixed to the disc, one end of the feeding tube passes through the cylinder; Among them, two long rods are fixed on the disc, and the long rods pass through the cylinder. A first cylindrical spring is sleeved on the outer circumference of each of the two long rods, and the two ends of the first cylindrical spring are respectively connected to the disc and the cylinder wall; The elastic sliding mechanism comprises two cross bars fixedly mounted on the base via two protruding blocks and a mounting seat slidably arranged on the two cross bars; Wherein, a second cylindrical spring is sleeved on the outer circumference of each of the two cross bars, one end of the second cylindrical spring is connected to the protrusion block, and the other end is connected to the mounting seat; A driving motor is mounted on the mounting seat, a rotating frame is fixed to the output shaft of the driving motor, and a plurality of strip-shaped protrusions are equidistantly provided on the rotating frame along the circumference, and a sleeve is provided on each strip-shaped protrusion, and the sleeve is fixed to the inside of the movable part and is also connected to the speed regulating mechanism; The speed regulating mechanism comprises a screw rod rotatably mounted on the base, two guide rods fixedly mounted on the base, and a transverse plate arranged on the screw rod and threadedly connected thereto; Among them, both guide rods pass through the transverse plate and are slidably connected to the transverse plate. The transverse plate is provided with a push-pull structure connected to the same sleeve plate. One end of the screw rod is connected to the gear transmission assembly installed on the base. The push-pull structure includes a rotating rod rotatably mounted on the upper portion of the transverse plate and a plurality of push-pull rods rotatably mounted on one end of the rotating rod facing the movable member. The plurality of push-pull rods are evenly spaced along the circumference, and one end away from the rotating rod is hinged to the sleeve plate. The toothed transmission assembly includes a gear rotatably mounted on the base and a transmission shaft, and the transmission shaft is connected to the rotating shaft of the gear through a first transmission belt. The transmission shaft is also connected to one end of the screw rod through a bevel gear set, and the gear is meshed with a rack plate fixed to the end of the long rod away from the disc.

2. A speed regulation method for a time-varying controllable screw extruder tablet press according to claim 1, characterized in that: The following steps are involved: Step 1: The internal mixer introduces the raw materials into the cylinder, and the rotation of the screw inside the cylinder causes the raw materials to be extruded into the cylinder; Step 2: As the raw material enters the cylinder, the pressure inside the cylinder changes, and the elastic follower mechanism is triggered to drive the speed regulating mechanism to move; In step three, the speed regulating mechanism moves, driving the plurality of movable parts to perform expansion or contraction movements, so as to increase or decrease the rotation speed of the screw inside the barrel.

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