Double-screw extruder with flow adjusting nozzle structure

Abstract

The invention relates to the technical field of extruders, and discloses a double-screw extruder with a flow regulation nozzle structure, which comprises an extruder body, the nozzle assembly comprises a hexagonal mounting block, the hexagonal mounting block is fixedly connected to a machine head of the extruder body, a first spray pipe is fixedly connected to the side, away from the extruder body, of the hexagonal mounting block, and a second spray pipe is fixedly connected to the end, away from the hexagonal mounting block, of the first spray pipe; the end, away from the first spray pipe, of the second spray pipe is fixedly connected with a nozzle. A speed adjusting unit is arranged on the inner surface of the circumference of the first spraying pipe. The double-screw extruder provided with the flow adjusting nozzle structure can effectively solve the problems that in the prior art, the flow of rubber in the runner is difficult to adjust, the inner pressure of the extruder is easy to fluctuate due to improper flow control, the abrasion of the nozzle, the screws and the machine barrel is increased, and the service life of equipment is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of extruders, and in particular to a twin-screw extruder equipped with a flow regulating nozzle structure. Background Art

[0002] Twin-screw extruders are widely used in filling, blending, modification, reinforcement, and devolatilization of chlorinated polypropylene and highly absorbent resins in rubber, plastics and engineering resins. The rubber enters the twin-screw extruder through the feed port, and under the extrusion and shearing action of the screw, the rubber is heated and plasticized, and is continuously extruded from the nozzle structure.

[0003] At present, it is difficult to regulate the flow rate of the rubber in the flow channel when it passes through the internal flow channel of the nozzle. Improper flow control can easily cause pressure fluctuations inside the extruder, increase the wear of the nozzle, screw and barrel, and thus shorten the service life of the equipment. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a twin-screw extruder equipped with a flow regulating nozzle structure, which can effectively solve the problem that it is difficult to regulate the flow of the rubber material in the flow channel in the prior art, and improper flow control can easily cause pressure fluctuations inside the extruder, increase the wear of the nozzle, screw and barrel, and thus shorten the service life of the equipment.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a twin-screw extruder equipped with a flow regulating nozzle structure, comprising:

[0009] Extruder body;

[0010] A nozzle assembly, the nozzle assembly comprising a hexagonal mounting block, the hexagonal mounting block is fixedly connected to the head of the extruder body, a first nozzle is fixedly connected to a side of the hexagonal mounting block away from the extruder body, a second nozzle is fixedly connected to an end of the first nozzle away from the hexagonal mounting block, and a nozzle is fixedly connected to an end of the second nozzle away from the first nozzle;

[0011] Wherein, a speed regulating unit is arranged on the inner circumferential surface of the first nozzle, and a first rotating drum is rotatably sleeved on the outer circumferential surface of the first nozzle. When the first rotating drum rotates around the first nozzle, the speed regulating unit regulates the flow rate in the first nozzle;

[0012] A mixing unit is arranged on the inner circumferential surface of the second nozzle, and a second rotating drum is rotatably sleeved on the outer circumferential surface of the second nozzle. The mixing unit can be adjusted by controlling the second rotating drum to rotate around the second nozzle at different angles.

[0013] Furthermore, the speed regulation unit includes a rotating block, which is rotatably arranged on the circumferential inner surface of the first nozzle, and the first nozzle is rotatably connected to a material baffle plate through the rotating block, one end of the rotating block passes through the side wall of the first nozzle and is fixedly connected to a worm gear, and a worm is rotatably connected to the circumferential outer surface of the first nozzle, and the worm is meshingly connected to the worm gear.

[0014] Furthermore, a gear ring is fixedly connected to the inner circumferential surface of the first rotating drum, and gears are fixedly connected to both ends of the worm, and the gears are meshingly connected to the gear ring.

[0015] Furthermore, the mixing unit includes two staggered V-shaped staggered plates, and the V-shaped staggered plates also include a staggered upper plate and a staggered lower plate, the staggered upper plate and the staggered lower plate abut against the circumferential inner surface of the second nozzle, the staggered upper plate and the staggered lower plate are rotatably connected by a central axis arranged inside the second nozzle, and short rods are fixedly connected on both sides of the staggered upper plate and the staggered lower plate.

[0016] Furthermore, limiting grooves are arranged on both sides of the second nozzle, and the limiting grooves include a transverse groove, an outer groove, an inner groove and an oblique groove, and one end of the outer groove is connected with the inner groove through the oblique groove.

[0017] Furthermore, vertical rods are fixedly connected on both sides of the second nozzle, a U-shaped plate is slidably sleeved on the circumferential outer surface of the vertical rods, telescopic cylinders are fixedly connected on both sides of the second nozzle, an L-rod is slidably connected inside the telescopic cylinder, and a hinged rod is movably hinged between one end of the L-rod and the U-shaped plate.

[0018] Furthermore, a slide rail is fixedly connected to the inner circumferential surface of the second rotating drum, and the slide rail includes a first spiral rail, an arc rail and a second spiral rail connected in sequence.

[0019] Furthermore, a guide groove is provided inside the second rotating drum, and the guide groove includes a first annular groove, a guide inclined groove and a second annular groove which are connected in sequence.

[0020] Beneficial Effects

[0021] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0022] The present invention is provided with a speed regulating unit and a mixing unit. By controlling the rotation angle of the baffle plate in the first nozzle, the resistance of the rubber material in the first nozzle is appropriately adjusted, so that the staff can adjust the flow rate of the rubber material in the first nozzle, prevent the pressure of the rubber material inside the extruder body from being too high and causing wear to the nozzle assembly and the extruder body, and extend the service life of the nozzle assembly and the extruder body. By controlling the two V-shaped staggered plates to be in an open state (such as Figure 4 As shown in the figure), the multi-color rubber materials in the second nozzle are divided and merged, thereby improving the plasticizing and blending effect between the multi-color rubber materials, thereby improving the color mixing uniformity of the multi-color rubber materials, eliminating flow marks, and improving the quality of the multi-color rubber materials. By controlling the two V-shaped staggered plates to be in a closed state (as shown in the figure), the multi-color rubber materials in the second nozzle are divided and merged, thereby improving the plasticizing and blending effect between the multi-color rubber materials, thereby improving the color mixing uniformity of the multi-color rubber materials, eliminating flow marks, and improving the quality of the multi-color rubber materials. Figure 8 As shown), the resistance of the single color rubber in the second nozzle is reduced, the flow rate of the unit color rubber in the second nozzle is increased, and the processing efficiency of the single color rubber is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 2 It is a structural schematic diagram of an embodiment of the present invention;

[0026] Figure 3 It is a structural schematic diagram of an embodiment of the present invention;

[0027] Figure 4 It is a structural schematic diagram of an embodiment of the present invention;

[0028] Figure 5 It is a structural schematic diagram of an embodiment of the present invention;

[0029] Figure 6 It is a structural schematic diagram of an embodiment of the present invention;

[0030] Figure 7 It is a structural schematic diagram of an embodiment of the present invention;

[0031] Figure 8 It is a structural schematic diagram of an embodiment of the present invention;

[0032] Fig. 9 It is a schematic structural diagram of an embodiment of the present invention.

[0033] The numbers in the figure represent:

[0034] 1. Extruder body; 2. Nozzle assembly; 21. Hexagonal mounting block;

[0035] 22. The first nozzle;

[0036] 221, speed regulating unit; 2211, rotating block; 2212, material blocking plate; 2213, worm wheel; 2214, worm;

[0037] 222, a first rotating drum; 2221, a gear ring; 2222, a gear;

[0038] 23. Second nozzle;

[0039] 231, mixing unit; 2311, V-shaped staggered plate; 23111, staggered upper plate; 23112, staggered lower plate; 23113, central axis; 23114, short rod;

[0040] 232, limiting groove; 2321, transverse groove; 2322, outer groove; 2323, inner groove; 2324, oblique groove;

[0041] 233, vertical rod; 2331, U-shaped plate; 2332, telescopic cylinder; 2333, L rod; 2334, hinged rod;

[0042] 234, second rotating drum;

[0043] 2341, slide rail; 23411, first spiral rail; 23412, arc rail; 23413, second spiral rail;

[0044] 2342, guide groove; 23421, first annular groove; 23422, guide inclined groove; 23423, second annular groove;

[0045] 24. Nozzle. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] The present invention will be further described below in conjunction with the embodiments.

[0048] Example:

[0049] See also Figure 1-Figure 9The present invention provides a technical solution: a twin-screw extruder equipped with a flow regulating nozzle structure, comprising:

[0050] Extruder body 1;

[0051] The nozzle assembly 2 includes a hexagonal mounting block 21, which is fixedly connected to the head of the extruder body 1, a first nozzle 22 is fixedly connected to the side of the hexagonal mounting block 21 away from the extruder body 1, a second nozzle 23 is fixedly connected to the end of the first nozzle 22 away from the hexagonal mounting block 21, and a nozzle 24 is fixedly connected to the end of the second nozzle 23 away from the first nozzle 22;

[0052] A speed regulating unit 221 is provided on the inner circumferential surface of the first nozzle 22, and a first rotating drum 222 is rotatably sleeved on the outer circumferential surface of the first nozzle 22. When the first rotating drum 222 rotates around the first nozzle 22, the speed regulating unit 221 regulates the flow rate in the first nozzle 22.

[0053] A mixing unit 231 is provided on the inner circumferential surface of the second nozzle 23 , and a second rotating drum 234 is rotatably sleeved on the outer circumferential surface of the second nozzle 23 . The mixing unit 231 can be adjusted by controlling the second rotating drum 234 to rotate around the second nozzle 23 at different angles.

[0054] The speed regulating unit 221 includes a rotating block 2211, which is rotatably arranged on the circumferential inner surface of the first nozzle 22. The first nozzle 22 is rotatably connected to a material baffle plate 2212 through the rotating block 2211. One end of the rotating block 2211 passes through the side wall of the first nozzle 22 and is fixedly connected to a worm gear 2213. A worm 2214 is rotatably connected to the circumferential outer surface of the first nozzle 22, and the worm 2214 is meshingly connected to the worm gear 2213.

[0055] A gear ring 2221 is fixedly connected to the inner circumferential surface of the first rotating drum 222 , and gears 2222 are fixedly connected to both ends of the worm 2214 . The gears 2222 are meshingly connected with the gear ring 2221 .

[0056] The mixing unit 231 includes two staggered V-shaped staggered plates 2311, and the V-shaped staggered plates 2311 also include a staggered upper plate 23111 and a staggered lower plate 23112. The staggered upper plate 23111 and the staggered lower plate 23112 abut against the circumferential inner surface of the second nozzle 23, and the staggered upper plate 23111 and the staggered lower plate 23112 are rotatably connected by a central axis 23113 arranged inside the second nozzle 23, and short rods 23114 are fixedly connected to both sides of the staggered upper plate 23111 and the staggered lower plate 23112.

[0057] Limiting grooves 232 are arranged on both sides of the second nozzle 23 . The limiting grooves 232 include a transverse groove 2321 , an outer groove 2322 , an inner groove 2323 and an oblique groove 2324 . One end of the outer groove 2322 is connected to the inner groove 2323 through the oblique groove 2324 .

[0058] Vertical rods 233 are fixedly connected to both sides of the second nozzle 23, a U-shaped plate 2331 is slidably sleeved on the circumferential outer surface of the vertical rod 233, telescopic cylinders 2332 are fixedly connected to both sides of the second nozzle 23, an L-rod 2333 is slidably connected inside the telescopic cylinder 2332, and a hinged rod 2334 is movably hinged between one end of the L-rod 2333 and the U-shaped plate 2331.

[0059] A slide rail 2341 is fixedly connected to the inner circumferential surface of the second rotating drum 234 , and the slide rail 2341 includes a first spiral rail 23411 , an arc rail 23412 , and a second spiral rail 23413 which are connected in sequence.

[0060] The second rotating drum 234 is provided with a guide groove 2342 inside, and the guide groove 2342 includes a first annular groove 23421, a guide inclined groove 23422 and a second annular groove 23423 which are connected in sequence.

[0061] refer to Figure 1-9 When the rubber material passes through the flow channel inside the nozzle, it is difficult to adjust the flow rate of the rubber material in the flow channel. Improper flow control can easily cause pressure fluctuations inside the extruder, increase the wear of the nozzle, screw and barrel, and thus shorten the service life of the equipment.

[0062] To overcome the above-mentioned defects, the present invention designs a twin-screw extruder equipped with a flow regulating nozzle structure.

[0063] Flow regulation process for rubber materials with different processing requirements:

[0064] By controlling the first rotating drum 222 to rotate around the axis of the first nozzle 22, the first rotating drum 222 drives the two gear rings 2221 inside thereof to rotate synchronously. Under the meshing action of the gear rings 2221 and the gears 2222, the two gear rings 2221 drive the gears 2222 inside thereof to rotate around the axis of the worm 2214. The two gears 2222 drive the worm 2214 to rotate on the circumferential outer surface of the first nozzle 22. Under the meshing action of the worm 2214 and the worm wheel 2213, the worm 2214 drives the worm wheel 2213 to rotate on the circumferential outer surface of the first nozzle 22. The worm gear 2213 drives the material baffle plate 2212 to rotate inside the first nozzle 22 through the rotating block 2211, thereby adjusting the rotation angle of the material baffle plate 2212 inside the first nozzle 22, and then adjusting the resistance encountered by the rubber material in the first nozzle 22, so that the staff can adjust the flow rate of the rubber material in the first nozzle 22, prevent the pressure of the rubber material inside the extruder body 1 from being too high and causing wear to the nozzle assembly 2 and the extruder body 1, and extend the service life of the nozzle assembly 2 and the extruder body 1.

[0065] When processing multi-color rubber compounds:

[0066] Through the two staggered V-shaped staggered plates 2311, when the rubber flows from the first nozzle 22 to the second nozzle 23, the mixing unit 231 divides and merges the rubber through the "special flow channel" between the two staggered upper plates 23111 and between the two staggered lower plates 23112, thereby improving the plasticizing and blending effect between the multi-color rubbers, thereby improving the color mixing uniformity of the multi-color rubbers, eliminating flow marks, and improving the quality of the multi-color rubbers.

[0067] When processing a single color rubber compound:

[0068] By controlling the second rotating drum 234 to rotate around the axis of the second nozzle 23, the second rotating drum 234 drives the inner slide rail 2341 to rotate synchronously. Under the limiting action of the first spiral rail 23411, the rotating first spiral rail 23411 drives the two central shafts 23113 to move away from each other along the transverse groove 2321, and the two central shafts 23113 drive the two V-shaped staggered plates 2311 to separate inside the second nozzle 23 (such as Figure 5As shown in the figure, at the same time, the short rod 23114 slides along the outer groove 2322 toward the U-shaped plate 2331 and slides into the inside of the U-shaped plate 2331. After the central shaft 23113 slides to the end of the horizontal groove 2321 close to the vertical rod 233, the second rotating cylinder 234 continues to rotate, so that the central shaft 23113 is slidably connected with the arc rail 23412, thereby fixing the position of the central shaft 23113 in the horizontal groove 2321. The second rotating cylinder 234 drives the guide groove 2342 to rotate, so that one end of the L rod 2333 is slidably connected with the guide inclined groove 23422 along the first annular groove 23421. Under the limiting action of the guide inclined groove 23422, the guide inclined groove 23422 drives the L rod 2 333 slides along the axial direction of the telescopic cylinder 2332 toward the second rotating cylinder 234. Under the hinged action of the hinged rod 2334, the L rod 2333 drives the two U-shaped plates 2331 to move toward each other along the vertical rod 233 through the hinged rod 2334. The two U-shaped plates 2331 drive the short rods 23114 inside thereof to rotate toward the inner groove 2323 around the central axis 23113. After one end of the L rod 2333 is slidably connected with the second annular groove 23423 along the guide inclined groove 23422, the height of the two U-shaped plates 2331 is adapted to the inner groove 2323. The short rod 23114 drives the staggered upper plate 23111 and the staggered lower plate 23112 on the V-shaped staggered plate 2311 to close (as shown in FIG. 2 ). Figure 8 As shown), the resistance of the rubber material in the second nozzle 23 is reduced, the flow rate of the rubber material in the second nozzle 23 is increased, and the processing efficiency of the single color rubber material is improved.

[0069] When cleaning the rubber on the two V-shaped staggered plates:

[0070] By rotating the second rotating drum 234, the second rotating drum 234 drives the slide rail 2341 to rotate, so that the central axis 23113 is slidably connected with the second spiral rail 23413 along the arc rail 23412, and under the limiting action of the second spiral rail 23413, the second spiral rail 23413 drives the two central axes 23113 to move toward each other along the transverse groove 2321, and the two central axes 23113 drive the two closed V-shaped staggered plates 2311 to move toward each other, so that the two V-shaped staggered plates 2311 are staggered and intersected together, thereby clearing the rubber on the V-shaped staggered plates 2311 to prevent the rubber from being blocked in the gaps on the V-shaped staggered plates 2311, thereby improving the use effect of the mixing unit 231.

[0071] In summary, the present application has the following advantages by adopting the speed regulating unit 221 and the mixing unit 231:

[0072] Advantage 1: By controlling the rotation angle of the baffle plate 2212 in the first nozzle 22, the resistance encountered by the rubber in the first nozzle 22 can be appropriately adjusted, so that the staff can adjust the flow rate of the rubber in the first nozzle 22, prevent the pressure of the rubber inside the extruder body 1 from being too high and causing wear to the nozzle assembly 2 and the extruder body 1, and extend the service life of the nozzle assembly 2 and the extruder body 1.

[0073] Advantage two, by setting the worm wheel 2213 and the worm 2214, utilizing the self-locking principle of the worm wheel 2213 and the worm 2214, after adjusting the rotation angle of the baffle plate 2212, the rotation angle of the baffle plate 2212 is automatically locked to prevent the rubber from pushing the baffle plate 2212 to rotate randomly inside the first nozzle 22, thereby maintaining the stability of the rubber flow rate.

[0074] Advantage three, by controlling the two V-shaped staggered plates 2311 to be in an open state (such as Figure 4 As shown in FIG. 2 ), the multi-color rubber materials in the second nozzle 23 are divided and merged, thereby improving the plasticizing and blending effect between the multi-color rubber materials, thereby improving the color mixing uniformity of the multi-color rubber materials, eliminating flow marks, and improving the quality of the multi-color rubber materials. By controlling the two V-shaped staggered plates 2311 to be in a closed state (as shown in FIG. 2 ), the multi-color rubber materials in the second nozzle 23 are divided and merged, thereby improving the plasticizing and blending effect between the multi-color rubber materials, thereby improving the color mixing uniformity of the multi-color rubber materials, eliminating flow marks, and improving the quality of the multi-color rubber materials. Figure 8 As shown), the resistance of the single color rubber in the second nozzle 23 is reduced, the flow rate of the unit color rubber in the second nozzle 23 is increased, and the processing efficiency of the single color rubber is improved.

[0075] Advantage four, by controlling the two closed V-shaped staggered plates 2311 to move toward each other, the two V-shaped staggered plates 2311 are staggered and intersected together, so as to clear the rubber on the V-shaped staggered plates 2311 and prevent the rubber from being blocked in the gaps between the V-shaped staggered plates 2311, thereby improving the use effect of the mixing unit 231.

[0076] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A twin-screw extruder equipped with a flow regulating nozzle structure, characterized in that: include: Extruder body (1); A nozzle assembly (2), the nozzle assembly (2) comprising a hexagonal mounting block (21), the hexagonal mounting block (21) being fixedly connected to a head of an extruder body (1), a first nozzle (22) being fixedly connected to a side of the hexagonal mounting block (21) away from the extruder body (1), a second nozzle (23) being fixedly connected to an end of the first nozzle (22) away from the hexagonal mounting block (21), and a nozzle (24) being fixedly connected to an end of the second nozzle (23) away from the first nozzle (22); A speed regulating unit (221) is provided on the inner circumferential surface of the first nozzle (22), and a first rotating drum (222) is rotatably sleeved on the outer circumferential surface of the first nozzle (22). When the first rotating drum (222) rotates around the first nozzle (22), the speed regulating unit (221) regulates the flow rate in the first nozzle (22); A mixing unit (231) is provided on the inner circumferential surface of the second nozzle (23), and a second rotating drum (234) is rotatably sleeved on the outer circumferential surface of the second nozzle (23). The mixing unit (231) can be adjusted by controlling the second rotating drum (234) to rotate around the second nozzle (23) at different angles.

2. A twin-screw extruder equipped with a flow regulating nozzle structure according to claim 1, characterized in that: The speed regulating unit (221) comprises a rotating block (2211), wherein the rotating block (2211) is rotatably arranged on the circumferential inner surface of the first nozzle (22), the first nozzle (22) is rotatably connected to a material baffle plate (2212) via the rotating block (2211), one end of the rotating block (2211) passes through the side wall of the first nozzle (22) and is fixedly connected to a worm gear (2213), and a worm (2214) is rotatably connected to the circumferential outer surface of the first nozzle (22), and the worm (2214) is meshingly connected to the worm gear (2213).

3. A twin-screw extruder equipped with a flow regulating nozzle structure according to claim 2, characterized in that: A gear ring (2221) is fixedly connected to the inner circumferential surface of the first rotating cylinder (222), and gears (2222) are fixedly connected to both ends of the worm (2214), and the gears (2222) are meshingly connected to the gear ring (2221).

4. A twin-screw extruder equipped with a flow regulating nozzle structure according to claim 1, characterized in that: The mixing unit (231) comprises two V-shaped staggered plates (2311) arranged in a staggered manner, and the V-shaped staggered plates (2311) further comprise a staggered upper plate (23111) and a staggered lower plate (23112), wherein the staggered upper plate (23111) and the staggered lower plate (23112) abut against the circumferential inner surface of the second nozzle (23), and the staggered upper plate (23111) and the staggered lower plate (23112) are rotatably connected via a central axis (23113) arranged inside the second nozzle (23), and short rods (23114) are fixedly connected to both sides of the staggered upper plate (23111) and the staggered lower plate (23112).

5. A twin-screw extruder equipped with a flow regulating nozzle structure according to claim 4, characterized in that: Limiting grooves (232) are arranged on both sides of the second nozzle (23), and the limiting grooves (232) include a transverse groove (2321), an outer groove (2322), an inner groove (2323) and an inclined groove (2324), and one end of the outer groove (2322) is connected to the inner groove (2323) through the inclined groove (2324).

6. A twin-screw extruder equipped with a flow regulating nozzle structure according to claim 1, characterized in that: Vertical rods (233) are fixedly connected to both sides of the second nozzle (23), a U-shaped plate (2331) is slidably sleeved on the circumferential outer surface of the vertical rod (233), a telescopic cylinder (2332) is fixedly connected to both sides of the second nozzle (23), an L-rod (2333) is slidably connected inside the telescopic cylinder (2332), and a hinge rod (2334) is movably hinged between one end of the L-rod (2333) and the U-shaped plate (2331).

7. A twin-screw extruder equipped with a flow regulating nozzle structure according to claim 1, characterized in that: A slide rail (2341) is fixedly connected to the inner circumferential surface of the second rotating drum (234), and the slide rail (2341) includes a first spiral rail (23411), an arc rail (23412) and a second spiral rail (23413) which are connected in sequence.

8. A twin-screw extruder equipped with a flow regulating nozzle structure according to claim 1, characterized in that: A guide groove (2342) is provided inside the second rotating drum (234), and the guide groove (2342) includes a first annular groove (23421), a guide inclined groove (23422) and a second annular groove (23423) which are connected in sequence.

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