A twin-screw granulating device for producing recycled plastic granules

Abstract

The present invention relates to the field of plastic manufacturing technology, specifically to a twin-screw granulation device for manufacturing recycled plastic granules, comprising a machine body, wherein the discharge end of the machine body is fixedly connected with four fan-shaped die heads in a circular array around its center, an outer cylinder is fixedly connected at the edge of the discharge end of the machine body, and two adjacent fan-shaped die heads are fixedly connected. Through the synchronous contraction movement and synchronous expansion movement of four arc-shaped knives one and four arc-shaped knives two, the strip-shaped plastic emerging from the two groups of die holes on the four fan-shaped die heads can be continuously and synchronously cut, and the cut granules are of the same size, thereby improving the granulation quality. The four arc-shaped knives one and the four arc-shaped knives two always maintain a certain degree of fit with the corresponding fan-shaped die heads, and have a better cutting effect on the strip-shaped plastic. The four arc-shaped knives one and the four arc-shaped knives two can both rotate and be vibrated to avoid material jamming.

Description

Technical Field

[0001] The invention relates to the technical field of plastic manufacturing, in particular to a twin-screw granulating device for manufacturing recycled plastic granules. Background Art

[0002] Twin-screw granulation device is a kind of mechanical equipment commonly used in polymer material processing. Its main function is to melt, mix, homogenize and other processes of raw materials (such as plastics, rubber or other polymers), finally extrude them into shapes on the die head and cut them into granular materials by the rotating blades on the die head. Twin-screw granulation device is widely used in the processing and production of recycled plastics. After the waste plastics (such as waste packaging, bottles, etc.) are cleaned and crushed, they are processed into reusable plastic particles through the twin-screw granulation device.

[0003] The die head of the twin-screw granulator usually has two groups of die holes in an annular array, one group of die holes is far away from the center of the die head, and the other group is close to the center of the die head. The raw materials will be continuously extruded from the two groups of die holes, and then continuously cut into particles by the rotating blade. However, the blade cannot synchronously cut all the strip plastics extruded from the two groups of die holes during the rotation process, because the blade has a rotation process, and only cuts the strip plastics extruded from the two groups of die holes one by one, and the raw materials are extruded from the two groups of die holes in real time, which causes the cut plastic particles to be of different sizes, affecting the granulation quality. If you choose to increase the rotation speed of the blade to reduce the size difference of the cut plastic particles, at this time, because the blade needs to fit on the surface of the die head to rotate (there is a certain degree of fit between the blade and the die head), then the blade's excessive rotation speed will accelerate the wear of the blade and the die head, which is not conducive to long-term use. Summary of the invention

[0004] The object of the present invention is to provide a twin-screw granulating device for producing recycled plastic granules to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a twin-screw granulating device for manufacturing recycled plastic pellets, comprising a machine body, wherein the discharge end of the machine body is fixedly connected with four fan-shaped die heads in a circular array around its center, an outer cylinder is fixedly connected at the edge of the discharge end of the machine body, and two adjacent fan-shaped die heads are fixedly connected, a transverse cylinder is commonly attached to the front end central angle of the four fan-shaped die heads, two groups of die holes are opened at the front ends of the four fan-shaped die heads, arc-shaped knife 2 and arc-shaped knife 1 are respectively attached to the front ends of the four fan-shaped die heads near the central angle and away from the central angle, arc-shaped knife 1 is elastically connected to arc plate 1 in front of the four arc-shaped knives through elastic components, arc-shaped knife 2 is elastically connected to arc plate 2 in front of the four arc-shaped knives through elastic components, an adjustment component is provided between the four arc-shaped plates 1 and the transverse cylinder, a regulating component is provided between the four arc-shaped plates 2 and the transverse cylinder, a rotating mechanism is provided between the transverse cylinder and the outer cylinder, and a transmission mechanism is provided inside the transverse cylinder.

[0006] Preferably, the elastic component includes three guide pillars 1, the three guide pillars 1 are evenly slidably inserted into the inner wall of the arc plate 1, the rear ends of the three guide pillars 1 are fixedly connected to the front end of the arc knife 1, and the outer walls of the three guide pillars 1 are slidably sleeved with a spring 1, and the three springs 1 are fixedly connected between the arc plate 1 and the arc knife 1.

[0007] Preferably, the elastic component includes three guide pillars 2, the three guide pillars 2 are evenly slidably inserted in the inner wall of the arc plate 2, the rear ends of the three guide pillars 2 are fixedly connected to the front end of the arc knife 2, the outer walls of the three guide pillars 2 are slidably sleeved with springs 2, and the three springs 2 are fixedly connected between the arc plate 2 and the arc knife 2.

[0008] Preferably, the adjustment assembly includes a ring 1, which is slidably mounted on the outer wall of the horizontal cylinder. The outer wall of the ring 1 is rotatably connected to four connecting rods 1 in a circular array around its center. The ends of the four connecting rods 1 away from the ring 1 are rotatably connected to blocks 1, and the four blocks 1 are respectively fixedly connected to the middle of the outer arc surfaces of four arc plates 1.

[0009] Preferably, the regulating component includes a second ring, which is slidably mounted on the outer wall of the horizontal cylinder, and is located behind the first ring. The outer wall of the second ring is rotatably connected to four connecting rods 2 in a circular array around its center, and the ends of the four connecting rods 2 away from the second ring are rotatably connected to blocks 2, and the four blocks 2 are respectively fixedly connected to the middle of the inner arc surfaces of the four arc plates 2.

[0010] Preferably, the outer wall of the horizontal cylinder is fixedly connected with four limit columns in a circular array around its center near the fan-shaped die head, and two L-shaped blocks are slidably sleeved on the outer walls of the four limit columns. The eight L-shaped blocks are respectively fixedly connected to one end of four blocks one and four blocks two.

[0011] Preferably, the rotating mechanism includes a bracket and a support plate, the bracket is fixedly connected to the inner wall of the outer cylinder away from the fan-shaped die head, the support plate is rotatably mounted on the outer wall of the horizontal cylinder away from the fan-shaped die head, the top of the support plate is fixedly connected to the inner wall of the outer cylinder, the inner wall of the bracket is fixedly penetrated by a motor 2, the output shaft end of the motor 2 is fixedly connected to the motor 1 through a mounting seat, and the rear end of the housing of the motor 1 is fixedly connected to the front end of the horizontal cylinder.

[0012] Preferably, the transmission mechanism includes a bidirectional screw and two sliding grooves, one end of the bidirectional screw is rotatably connected to the inner rear end surface of the cross cylinder, the front end of the bidirectional screw is fixedly connected to the output shaft end of motor one, the two sliding grooves are symmetrically arranged at the bottom of the outer wall of the cross cylinder, the outer wall of the bidirectional screw is symmetrically threaded with a screw sleeve, the outer wall bottoms of the two screw sleeves are fixedly connected with sliders, the two sliders are respectively slidably matched with the two sliding grooves, and the ends of the two sliders away from the screw sleeves are respectively fixedly connected to the inner ring surfaces of collar one and collar two.

[0013] Preferably, the front and rear ends of the support plates are fixedly connected with U-shaped plates, the inner walls of the two U-shaped plates are slidably interspersed with knocking columns, the lower ends of the two knocking columns are hemispherical, the lower ends of the two knocking columns are tightly fitted with the outer wall of the horizontal cylinder, and the outer walls of the two knocking columns are fixedly sleeved with connecting rings, the upper ends of the two connecting rings are respectively fixedly connected with compression springs between the two U-shaped plates, the two compression springs are respectively slidably sleeved on the outer walls of the two knocking columns, and the outer wall of the horizontal cylinder corresponding to the two knocking columns is fixedly connected with a plurality of hemispherical blocks in a circular array.

[0014] Preferably, the bottom of the outer wall of the outer cylinder is connected to a discharge pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the cooperation of the fan-shaped die head, the outer cylinder, the transverse cylinder, the die hole, the arc knife 2, the arc knife 1, the elastic component, the arc plate 1, the elastic component, the arc plate 2, the adjustment component, the control component, the rotating mechanism and the transmission mechanism, and through the synchronous contraction movement and the synchronous expansion movement of the four arc knives 1 and the four arc knives 2, the strip plastics emerging from the two groups of die holes on the four fan-shaped die heads can be continuously and synchronously cut, and the cut particles are of the same size, thereby improving the granulation quality.

[0017] 2. The four arc-shaped knives 1 and 2 always maintain a certain degree of fit with the corresponding fan-shaped die head, which has a better cutting effect on strip plastics.

[0018] 3. The four arc-shaped knives 1 and 2 can both rotate and vibrate to avoid material jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a partial cross-sectional view of the outer cylinder of the present invention;

[0021] Figure 3 For the present invention Figure 2 A magnified view of the structure at center;

[0022] Figure 4 It is a schematic diagram of the local structure of the four-sector die head of the present invention;

[0023] Figure 5 For the present invention Figure 4 A magnified view of the structure at B in the middle;

[0024] Figure 6 It is a schematic diagram of the local structure between the motor 1 and the four-piece arc-shaped blade 1 of the present invention;

[0025] Figure 7 It is a schematic diagram of the local structure between the motor 1 and the four-piece arc-shaped blade 2 of the present invention;

[0026] Figure 8 It is a partial cross-sectional view of the transverse cylinder of the present invention.

[0027] In the attached drawings, the list of parts represented by each reference numeral is as follows: 1. outer cylinder; 2. discharge pipe; 3. machine body; 4. motor one; 5. support plate; 6. collar two; 7. U-shaped plate; 8. die hole; 9. hemispherical block; 10. fan-shaped die head; 11. bracket; 12. cross cylinder; 13. collar one; 14. motor two; 15. connecting rod one; 16. guide column two; 17. limit column; 18. arc plate one; 19. L-shaped block; 20. block one; 21. guide column one; 22. arc knife one; 23. block two; 24. connecting rod two; 25. arc plate two; 26. arc knife two; 27. spring two; 28. spring one; 29. ​​connecting ring; 30. slide groove; 31. slider; 32. screw sleeve; 33. bidirectional screw rod; 34. knocking column; 35. compression spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0029] Example 1: Please refer to Figure 1 - Figure 8A twin-screw granulating device for manufacturing recycled plastic pellets, comprising a machine body 3, a discharge end of the machine body 3 is fixedly connected with four fan-shaped die heads 10 in a circular array around its center, an outer cylinder 1 is fixedly connected to the edge of the discharge end of the machine body 3, two adjacent fan-shaped die heads 10 are fixedly connected, a horizontal cylinder 12 is commonly attached to the front end center angle of the four fan-shaped die heads 10, two groups of die holes 8 are opened at the front end of the four fan-shaped die heads 10, and the front ends of the four fan-shaped die heads 10 are close to the center angle and away from the center angle. The central angles are respectively fitted with arc-shaped knives 26 and arc-shaped knives 1 22, the fronts of the four arc-shaped knives 1 22 are elastically connected with arc plates 18 through elastic components, the fronts of the four arc-shaped knives 26 are elastically connected with arc plates 25 through elastic components, an adjustment component is provided between the four arc plates 1 18 and the horizontal cylinder 12, a control component is provided between the four arc plates 25 and the horizontal cylinder 12, a rotating mechanism is provided between the horizontal cylinder 12 and the outer cylinder 1, and a transmission mechanism is provided inside the horizontal cylinder 12.

[0030] The elastic component includes three guide pillars 21, which are uniformly slidably inserted into the inner wall of the arc plate 18, and the rear ends of the three guide pillars 21 are fixedly connected to the front end of the arc knife 22. The outer walls of the three guide pillars 21 are slidably sleeved with springs 28, and the three springs 28 are fixedly connected between the arc plate 18 and the arc knife 22.

[0031] The elastic component includes three guide pillars 2 16, which are evenly slidably inserted into the inner wall of the arc plate 25, and the rear ends of the three guide pillars 2 16 are fixedly connected to the front end of the arc knife 26. The outer walls of the three guide pillars 2 16 are slidably sleeved with springs 27, and the three springs 27 are fixedly connected between the arc plate 25 and the arc knife 26.

[0032] The adjusting assembly includes a collar 13, which is slidably mounted on the outer wall of the horizontal cylinder 12. The outer wall of the collar 13 is connected to four connecting rods 15 in a circular array around its center. The ends of the four connecting rods 15 away from the collar 13 are all connected to blocks 20 in a rotatable manner. The four blocks 20 are respectively fixedly connected to the middle of the outer arc surfaces of the four arc plates 18.

[0033] The regulating component includes a ring 2 6, which is slidably mounted on the outer wall of the horizontal cylinder 12, and is located behind the ring 1 13. The outer wall of the ring 2 6 is rotatably connected to four connecting rods 24 in a circular array around its center. The ends of the four connecting rods 24 away from the ring 2 6 are rotatably connected to blocks 23, and the four blocks 23 are respectively fixedly connected to the middle of the inner arc surfaces of the four arc plates 25.

[0034] The outer wall of the horizontal cylinder 12 is fixedly connected with four limit columns 17 in a circular array around its center near the fan-shaped die head 10. Two L-shaped blocks 19 are slidably sleeved on the outer walls of the four limit columns 17. The eight L-shaped blocks 19 are fixedly connected to one end of the four blocks 1 20 and the four blocks 2 23 respectively.

[0035] The rotating mechanism includes a bracket 11 and a support plate 5. The bracket 11 is fixedly connected to the inner wall of the outer cylinder 1 away from the fan-shaped die head 10. The support plate 5 is rotatably mounted on the outer wall of the horizontal cylinder 12 away from the fan-shaped die head 10. The top of the support plate 5 is fixedly connected to the inner wall of the outer cylinder 1. A motor 2 14 is fixedly installed through the inner wall of the bracket 11. The output shaft end of the motor 2 14 is fixedly connected to the motor 1 4 through a mounting seat. The rear end of the housing of the motor 1 4 is fixedly connected to the front end of the horizontal cylinder 12.

[0036] The transmission mechanism includes a bidirectional screw rod 33 and two slide grooves 30. One end of the bidirectional screw rod 33 is rotatably connected to the inner rear end surface of the horizontal cylinder 12, and the front end of the bidirectional screw rod 33 is fixedly connected to the output shaft end of the motor 4. The two slide grooves 30 are symmetrically arranged at the bottom of the outer wall of the horizontal cylinder 12. The outer wall of the bidirectional screw rod 33 is symmetrically threaded with a screw sleeve 32. The outer wall bottoms of the two screw sleeves 32 are fixedly connected with sliders 31. The two sliders 31 are respectively slidably matched with the two slide grooves 30, and the ends of the two sliders 31 away from the screw sleeve 32 are respectively fixedly connected to the inner ring surfaces of the ring 13 and the ring 2 6.

[0037] The bottom of the outer wall of the outer cylinder 1 is connected with a discharge pipe 2 .

[0038] In this embodiment, after the waste plastics are cleaned and crushed, they can be poured into the feed port of the machine body 3. The machine body 3 can melt, mix, homogenize and cool the waste plastic particles, and transport them in the direction of the four fan-shaped die heads 10. The die holes 8 on the four fan-shaped die heads 10 are connected to the extrusion end of the machine body 3. Then, the raw materials will finally emerge in strips from the die holes 8 on the four fan-shaped die heads 10. At the same time, start the motor 14 to drive the bidirectional screw rod 33 to rotate. The bidirectional screw rod 33 has two opposite threaded sections, which can drive the two screw sleeves 32 to move away from each other. The two screw sleeves 32 can drive the respectively connected sliders 31 to slide in the corresponding slide grooves 30, and the two sliders 31 can drive the collar 13 and the collar 2 6 to slide away from each other on the outer wall of the horizontal cylinder 12.

[0039] The collar 13 can drive the four connecting rods 15 to rotate synchronously in a contracted form, and the four connecting rods 15 can drive the blocks 20 connected to them to move synchronously close to the horizontal cylinder 12. The four blocks 20 can drive the L-shaped blocks 19 connected to them to slide synchronously close to the horizontal cylinder 12 outside the corresponding limit columns 17, and the four blocks 20 can drive the arc plates 18 connected to them to move synchronously close to the horizontal cylinder 12. The four arc plates 18 can drive the arc knives 22 connected to them to slide synchronously close to the horizontal cylinder 12 on the front end surfaces of the four fan-shaped die heads 10.

[0040] The collar 26 can drive the four connecting rods 24 to rotate synchronously in an expanded form, and the four connecting rods 24 can drive the respectively connected blocks 23 to move synchronously away from the horizontal cylinder 12, and the four blocks 23 can drive the respectively connected L-shaped blocks 19 to slide synchronously away from the horizontal cylinder 12 outside the corresponding limit columns 17, and the four blocks 23 can drive the respectively connected arc plates 25 to move synchronously away from the horizontal cylinder 12, and the four arc plates 25 can drive the respectively connected arc knives 26 to slide synchronously away from the horizontal cylinder 12 on the front end surfaces of the four fan-shaped die heads 10.

[0041] In summary, the four arc-shaped knives 1 22 can synchronously cut the strip plastics emerging from a group of die holes 8 far from the center angle of the circle on the four fan-shaped die heads 10, and the four arc-shaped knives 2 26 can synchronously cut the strip plastics emerging from a group of die holes 8 close to the center angle of the circle on the four fan-shaped die heads 10. The specific positional relationship between the two groups of die holes 8 on each fan-shaped die head 10 can be referred to Figure 4 Then, the motor 1 4 is used to drive the bidirectional screw rod 33 to rotate in the opposite direction, so on the contrary, the four arc-shaped knives 1 22 and the four arc-shaped knives 2 26 can return to the original position. Figure 4 The state shown in the figure is used to continuously and synchronously cut the strip plastic emerging from the two groups of die holes 8 on the four fan-shaped die heads 10 in this reciprocating manner.

[0042] It should be noted that the arc blade 1 22 is elastically connected through three guide pillars 1 21, three springs 1 28 and arc plate 1 18. Under the force of the three springs 1 28 (the springs 1 28 are in a certain compressed state), the arc blade 1 22 and the fan-shaped die head 10 always have a certain degree of fit, thereby having a good cutting effect on the strip plastic. The arc blade 2 26 is elastically connected through three guide pillars 2 16, three springs 2 27 and arc plate 2 25. Under the force of the three springs 2 27 (the springs 2 27 are in a certain compressed state), the arc blade 2 26 and the fan-shaped die head 10 always have a certain degree of fit, thereby having a good cutting effect on the strip plastic.

[0043] It should also be noted that, through the synchronous contraction and expansion movement of the four arc-shaped knives 1 22 and the four arc-shaped knives 2 26, not only can the strip plastic emerging from the two groups of die holes 8 on the four fan-shaped die heads 10 be continuously and synchronously cut, but the cut particles are of uniform size and will be discharged from the discharge pipe 2, thereby improving the granulation quality.

[0044] Example 2: Please refer to Figure 2 and Figure 3 , this embodiment further explains Example 1, the front and rear ends of the support plate 5 are fixedly connected with U-shaped plates 7, the inner walls of the two U-shaped plates 7 are slidably interspersed with knocking columns 34, the lower ends of the two knocking columns 34 are hemispherical, the lower ends of the two knocking columns 34 are tightly fitted with the outer wall of the horizontal cylinder 12, and the outer walls of the two knocking columns 34 are fixedly sleeved with connecting rings 29, and the upper ends of the two connecting rings 29 are respectively fixedly connected to the two U-shaped plates 7 with compression springs 35, and the two compression springs 35 are respectively slidably sleeved on the outer walls of the two knocking columns 34, and the outer wall of the horizontal cylinder 12 corresponds to the two knocking columns 34, and a plurality of hemispherical blocks 9 are fixedly connected in a circular array.

[0045] In this embodiment, after the cutting and granulation is completed, in order to avoid particles being stuck between the arc knife 1 22 and the arc plate 1 18, and between the arc knife 2 26 and the arc plate 2 25, the motor 2 14 is started at this time, and the motor 2 14 can drive the motor 1 4, the horizontal cylinder 12, the collar 1 13, the collar 2 6, the four connecting rods 15, the four connecting rods 24, the four arc plates 18, the four arc knives 1 22, the four arc plates 25, the four arc knives 2 26, etc. to rotate together. Under the action of the rotation, the particles stuck between the arc knife 1 22 and the arc plate 1 18, and between the arc knife 2 26 and the arc plate 2 25 will fall off. At the same time, the horizontal cylinder 12 will drive the multiple hemispherical blocks 9 at two locations to rotate together, and the multiple hemispherical blocks 9 at each location are connected to a knocking column 3. 4, and each hemispherical block 9 will squeeze the hemispherical end of the knocking column 34 when it rotates, and will push the knocking column 34 to slide up in the U-shaped plate 7, and the knocking column 34 will drive the connecting ring 29 to squeeze the compression spring 35. When the hemispherical block 9 rotates away from the hemispherical end of the knocking column 34, under the action of the compression spring 35, the knocking column 34 will move down and reset and hit the horizontal cylinder 12, so that the horizontal cylinder 12 vibrates, and the four arc plates 1 18, the four arc knives 1 22, the four arc plates 25, the four arc knives 2 26, etc. are subjected to resonance, so that the particles stuck between the arc knife 1 22 and the arc plate 1 18, and between the arc knife 2 26 and the arc plate 25 will fall off, so that the discharge is thorough and the inconvenience caused by the stuck material is avoided.

[0046] It should be noted that the motor 1 4 is equipped with a power supply and is connected to each other through wires, that is, when the motor 1 4 rotates, the wires will not be pulled.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A twin-screw granulating device for producing recycled plastic granules, comprising a body (3), characterized in that: The discharge end of the machine body (3) is fixedly connected to four fan-shaped die heads (10) in a circular array around its center. The edge of the discharge end of the machine body (3) is fixedly connected to an outer cylinder (1). Two adjacent fan-shaped die heads (10) are fixedly connected. The front end central angles of the four fan-shaped die heads (10) are commonly attached to a horizontal cylinder (12). The front ends of the four fan-shaped die heads (10) are each provided with two groups of die holes (8). The front ends of the four fan-shaped die heads (10) are each respectively attached to arc-shaped knives (2) at the positions close to the central angle and at the positions away from the central angle. 26) and the arc-shaped knife one (22), the front of the four arc-shaped knives one (22) are elastically connected to the arc plate one (18) through an elastic component, the front of the four arc-shaped knives two (26) are elastically connected to the arc plate two (25) through an elastic component, an adjustment component is provided between the four arc plates one (18) and the transverse cylinder (12), a control component is provided between the four arc plates two (25) and the transverse cylinder (12), a rotating mechanism is provided between the transverse cylinder (12) and the outer cylinder (1), and a transmission mechanism is provided inside the transverse cylinder (12); The adjustment assembly comprises a collar (13), wherein the collar (13) is slidably sleeved on the outer wall of the horizontal cylinder (12), and the outer wall of the collar (13) is rotatably connected to four connecting rods (15) in a circular array around its center, and the ends of the four connecting rods (15) away from the collar (13) are rotatably connected to blocks (20), and the four blocks (20) are respectively fixedly connected to the middle parts of the outer arc surfaces of the four arc plates (18); The regulating component comprises a second collar (6), the second collar (6) being slidably mounted on the outer wall of the horizontal cylinder (12), the second collar (6) being located behind the first collar (13), the outer wall of the second collar (6) being rotatably connected to four second connecting rods (24) in a circular array around its center, the four second connecting rods (24) being rotatably connected to the ends of the second collar (6) away from the second collar (6), the four second connecting rods (23) being respectively fixedly connected to the middle of the inner arc surface of the four second arc plates (25); The outer wall of the horizontal cylinder (12) is fixedly connected to four limit columns (17) in a circular array around the center near the fan-shaped die head (10), and two L-shaped blocks (19) are slidably sleeved on the outer walls of the four limit columns (17). The eight L-shaped blocks (19) are respectively fixedly connected to one end of the four blocks 1 (20) and the four blocks 2 (23).

2. A twin-screw granulating device for producing recycled plastic granules according to claim 1, characterized in that: The elastic component comprises three guide pillars (21), the three guide pillars (21) are uniformly slidably inserted into the inner wall of the arc plate (18), the rear ends of the three guide pillars (21) are fixedly connected to the front end of the arc knife (22), the outer walls of the three guide pillars (21) are slidably sleeved with springs (28), and the three springs (28) are fixedly connected between the arc plate (18) and the arc knife (22).

3. A twin-screw granulating device for producing recycled plastic granules according to claim 1, characterized in that: The elastic component comprises three guide pillars (16), the three guide pillars (16) are uniformly slidably inserted into the inner wall of the arc plate (25), the rear ends of the three guide pillars (16) are fixedly connected to the front end of the arc knife (26), the outer walls of the three guide pillars (16) are slidably sleeved with springs (27), and the three springs (27) are fixedly connected between the arc plate (25) and the arc knife (26).

4. A twin-screw granulating device for producing recycled plastic granules according to claim 3, characterized in that: The rotating mechanism comprises a bracket (11) and a support plate (5), wherein the bracket (11) is fixedly connected to the inner wall of the outer cylinder (1) away from the fan-shaped die head (10), and the support plate (5) is rotatably mounted on the outer wall of the transverse cylinder (12) away from the fan-shaped die head (10), and the top end of the support plate (5) is fixedly connected to the inner wall of the outer cylinder (1), and a motor 2 (14) is fixedly installed through the inner wall of the bracket (11), and the output shaft end of the motor 2 (14) is fixedly connected to the motor 1 (4) through a mounting seat, and the rear end of the housing of the motor 1 (4) is fixedly connected to the front end of the transverse cylinder (12).

5. A twin-screw granulating device for producing recycled plastic granules according to claim 4, characterized in that: The transmission mechanism comprises a bidirectional screw rod (33) and two slide grooves (30), one end of the bidirectional screw rod (33) is rotatably connected to the inner rear end surface of the horizontal cylinder (12), the front end of the bidirectional screw rod (33) is fixedly connected to the output shaft end of the motor 1 (4), the two slide grooves (30) are symmetrically arranged at the bottom of the outer wall of the horizontal cylinder (12), the outer wall of the bidirectional screw rod (33) is symmetrically threaded with a screw sleeve (32), the outer wall bottoms of the two screw sleeves (32) are fixedly connected with a slider (31), the two sliders (31) are respectively slidably matched with the two slide grooves (30), and the ends of the two sliders (31) away from the screw sleeve (32) are respectively fixedly connected to the inner ring surfaces of the first ring (13) and the second ring (6).

6. A twin-screw granulating device for producing recycled plastic granules according to claim 5, characterized in that: The front and rear ends of the support plate (5) are fixedly connected to a U-shaped plate (7), the inner walls of the two U-shaped plates (7) are slidably interspersed with knocking columns (34), the lower ends of the two knocking columns (34) are hemispherical, the lower ends of the two knocking columns (34) are tightly fitted with the outer wall of the horizontal cylinder (12), the outer walls of the two knocking columns (34) are fixedly sleeved with a connecting ring (29), the upper ends of the two connecting rings (29) are respectively fixedly connected to the two U-shaped plates (7) with compression springs (35), the two compression springs (35) are respectively slidably sleeved on the outer walls of the two knocking columns (34), and the outer wall of the horizontal cylinder (12) corresponding to the two knocking columns (34) is fixedly connected with a plurality of hemispherical blocks (9) in an annular array.

7. A twin-screw granulation device for producing recycled plastic granules according to claim 1, characterized in that: The bottom of the outer wall of the outer cylinder (1) is connected to a discharge pipe (2).

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