A forming die for producing polyether ether ketone by mechanically recycling waste plastics and a forming method thereof

Abstract

The present application relates to waste plastic recycling forming extrusion technical field, specifically to a kind of forming die and forming method for producing polyether ether ketone by mechanical recycling waste plastic, comprising: connecting disc, and the die body being set on connecting disc, die body end is provided with extrusion head, and extrusion head is formed with symmetrically arranged extrusion runner;Fixed rod is set in die body, and the axial sliding of fixed rod has first sealing disc, first sealing disc is rotatably installed with first rotating disc, second sealing disc is set on fixed rod, and second sealing disc is rotatably installed with second rotating disc;Trigger switching mechanism is set in die body, and follow-up adjusting mechanism connected with trigger switching mechanism is set on fixed rod;Conduction mechanism is set on first rotating disc and second rotating disc, and the present application can automatically adjust the conduction state of extrusion runner according to the pressure variation in die body, to ensure the stability of plastic extrusion.

Description

Technical Field

[0001] This invention relates to the field of waste plastic recycling molding and extrusion technology, specifically a molding die and molding method for producing polyetheretherketone (PEEK) from waste plastics through mechanical recycling. Background Technology

[0002] Polyetheretherketone (PEEK) is a high-performance, semi-crystalline thermoplastic polymer. Due to its excellent mechanical properties, chemical resistance, high-temperature resistance, and biocompatibility, it is widely used in aerospace, medical devices, automotive, and electronics industries.

[0003] When producing polyetheretherketone (PEEK) from waste plastics, it is usually necessary to crush the waste plastics mechanically, clean them, and then generate PEEK through a chemical reaction. Finally, the PEEK is extruded through melt extrusion to obtain the final product.

[0004] In extrusion molding, a screw extruder is usually used in conjunction with an extrusion die. The screw extruder heats and melts the material, which is then conveyed to the extrusion die to obtain the desired product.

[0005] However, polyetheretherketone derived from waste plastics may have a widened molecular weight distribution due to insufficient monomer purity or unstable polymerization process. Consequently, during extrusion, inconsistent melt flow may occur, resulting in fluctuations in the extruded material. This leads to flow marks and uneven gloss on the surface of the extruded material, ultimately causing a decline in the mechanical properties of the product. Summary of the Invention

[0006] The purpose of this invention is to provide a molding die and molding method for producing polyetheretherketone (PEEK) by mechanically recycling waste plastics, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A molding die for producing polyetheretherketone (PEEK) from waste plastics via mechanical recycling, comprising:

[0009] A connecting plate and a mold body disposed on the connecting plate, wherein an extrusion head is provided at the end of the mold body and an extrusion flow channel is formed inside the extrusion head in a symmetrical arrangement;

[0010] Also includes:

[0011] A fixing rod is set inside the mold body. A first sealing disc slides axially on the fixing rod. A first rotating disc is rotatably mounted on the first sealing disc. A second sealing disc is set on the fixing rod. A second rotating disc is rotatably mounted on the second sealing disc.

[0012] A trigger switching mechanism is installed inside the mold body, and a follow-up adjustment mechanism connected to the trigger switching mechanism is installed on the fixed rod.

[0013] The guiding mechanism is set on the first rotating disk and the second rotating disk. When the first sealing disk is pushed by pressure, the follow-up adjustment mechanism can first drive the first rotating disk to rotate by triggering the switching mechanism, and then drive the second rotating disk to rotate, so as to adjust the guiding state of the extrusion channel through the guiding mechanism.

[0014] As a further aspect of the present invention: the trigger switching mechanism includes rotating sleeves that are symmetrically arranged and rotatably mounted on the first rotating disk and the second rotating disk respectively, and the mold body is provided with a guide post that penetrates the first sealing disk and the second sealing disk;

[0015] It also includes a guide assembly and a sliding assembly disposed on the rotating sleeve for controlling the rotation of the first rotating disk and the second rotating disk.

[0016] As a further embodiment of the present invention: the guiding assembly includes a spiral groove formed on the outer circumference of the rotating sleeve, a support plate rotatably mounted on the rotating sleeve and sliding axially with the guide post, a guide plate slidably connected to the guide post sliding axially on the rotating sleeve, a limiting block provided on the inner wall of the guide plate and slidingly engaging with the spiral groove, and a first spring sleeved on the rotating sleeve, the two ends of the first spring respectively abutting against the support plate and the guide plate.

[0017] As a further embodiment of the present invention: the sliding assembly includes a sliding groove formed on the support plate, a sliding block is slidably installed in the sliding groove, guide grooves are formed on the first rotating disk and the second rotating disk, and a limiting post is provided on the side wall of the sliding block to slide and engage with the guide groove.

[0018] As a further embodiment of the present invention: the follow-up adjustment mechanism includes a receiving plate disposed on the fixed rod, a support sleeve hinged to the receiving plate, a support rod hinged to the sliding block slidingly disposed axially inside the support sleeve, a groove formed on the support sleeve, and a movable ring slidably connected to the groove at the end of the support rod.

[0019] As a further embodiment of the present invention: the follow-up adjustment mechanism further includes a limiting ring disposed on the fixed rod, a pushing ring that abuts against the limiting ring is axially slidable on the fixed rod, a connecting rod that is hinged to the sliding block is hinged on the pushing ring, and a support column that abuts against the pushing ring is disposed on the support plate.

[0020] As a further embodiment of the present invention: two second springs are symmetrically arranged on the fixing rod, one of the second springs having its two ends abutting against the pushing ring and the guide plate respectively, and the other second spring having its two ends abutting against the receiving plate and the guide plate respectively.

[0021] As a further embodiment of the present invention: the guiding mechanism includes a first conveying hole formed on the first sealing disk, a first guiding hole formed on the first rotating disk that is in communication with the first conveying hole, a conveying pipe connected to the extrusion channel on the second sealing disk, and a guiding groove and a second guiding hole formed on the second rotating disk, wherein the guiding groove and the second guiding hole are in communication with the conveying pipe.

[0022] As a further embodiment of the present invention: the conducting mechanism further includes a bellows disposed on the support plate and conducting with the first conducting hole, the second conducting hole and the conducting groove.

[0023] A molding method for producing polyetheretherketone (PEEK) from waste plastics via mechanical recycling includes the following steps:

[0024] Step 1: The molten material is conveyed into the mold body through the connecting plate;

[0025] Step 2: When the molten material inside the mold reaches the set pressure, it pushes the first sealing disc to move, which in turn drives the trigger switching mechanism to move.

[0026] Step 3: Under the action of the trigger switching mechanism, according to the pressure change inside the mold body, the first rotating disk is controlled to rotate first through the follow-up adjustment mechanism, and then the second rotating disk is controlled to rotate.

[0027] Step 4: The first and second rotating disks will drive the guiding mechanism to move, so as to adjust the guiding state of the extrusion channel.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] This application can adaptively adjust the conduction state of the extrusion channel according to the pressure change inside the mold body to ensure the uniformity and stability of material extrusion. Specifically, when the pressure in the buffer cavity increases, it pushes the first sealing disc to move towards the second sealing disc. When the pressure in the buffer cavity reaches the first set value, the first rotating disc is controlled to rotate under the action of the trigger switching mechanism and the follow-up adjustment mechanism, and one of the extrusion channels is controlled to be open through the conduction mechanism. At this time, the material will be extruded through the extrusion channel. Under the action of the buffer cavity, it can compensate for or absorb the sudden increase or decrease of material caused by flow fluctuations, ensuring the uniformity of the extruded material. If the pressure in the buffer cavity continues to increase and reaches the second set value, the second rotating disc is controlled to rotate under the action of the trigger switching mechanism and the follow-up adjustment mechanism, so that both extrusion channels are open, ensuring that the material performance will not be poor due to pressure fluctuations.

[0030] By cooperating with the limiting post and the guide groove, when the pressure in the buffer cavity reaches the first or second set value, the first or second rotating disk can be controlled to rotate to adjust the conduction state of the extrusion channel. During the extrusion process, regardless of whether the amount of material delivered to the buffer cavity increases or decreases due to fluctuations, the buffer cavity can perform corresponding storage or compensation actions to ensure the stability and uniformity of the extruded material. Even if the pressure fluctuates between the first and second set values ​​during the extrusion process, it will not affect the normal discharge of the extrusion channel. When the pressure in the buffer cavity is lower than the extrusion pressure set by the extrusion channel, it will be re-sealed to allow the buffer cavity to continue storing material, further ensuring that the mechanical properties of the material after extrusion are not lost.

[0031] By cooperating with the first and second rotating disks through the guiding mechanism, the extrusion channel can be adjusted to achieve the effect of adaptively adjusting the extrusion rate according to the pressure in the buffer cavity. Attached Figure Description

[0032] Figure 1 A schematic diagram of one embodiment of a molding die for producing polyetheretherketone (PEEK) by mechanically recycling waste plastics.

[0033] Figure 2 This is a schematic diagram of the structure of a molding die for producing polyetheretherketone (PEEK) from waste plastics through mechanical recycling, taken from another angle.

[0034] Figure 3 This is a schematic cross-sectional view of the mold body and extrusion head in one embodiment of a molding die for producing polyetheretherketone (PEEK) from waste plastics via mechanical recycling.

[0035] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0036] Figure 5 This is a schematic diagram of the internal structure of a molding die for producing polyetheretherketone (PEEK) from waste plastics through mechanical recycling, according to one embodiment.

[0037] Figure 6 for Figure 5 Another structural diagram from another angle.

[0038] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point B.

[0039] Figure 8 This is a schematic diagram showing the connection relationship between a portion of the trigger switching mechanism, a portion of the follow-up adjustment mechanism, and a portion of the conduction mechanism in one embodiment of a molding die for producing polyetheretherketone (PEEK) from waste plastics through mechanical recycling.

[0040] Figure 9 This is an exploded structural diagram of a molding die for producing polyetheretherketone (PEEK) from waste plastics via mechanical recycling, showing a portion of the trigger switching mechanism and a portion of the follow-up adjustment mechanism.

[0041] Figure 10 This is a schematic diagram of the structure of a molding die for producing polyetheretherketone (PEEK) from waste plastics via mechanical recycling, comprising a partial trigger switching mechanism, a partial follow-up adjustment mechanism, a second sealing disc, and a second rotating disc in one embodiment.

[0042] Figure 11 This is an exploded structural diagram of a molding die for producing polyetheretherketone (PEEK) from waste plastics via mechanical recycling, comprising a partial triggering switching mechanism, a partial follow-up adjustment mechanism, and a partial conduction mechanism.

[0043] Figure 12 This is an exploded structural diagram of the conduction mechanism in one embodiment of a molding die for producing polyetheretherketone (PEEK) from waste plastics via mechanical recycling.

[0044] In the diagram: 1. Connecting disc; 2. Mold body; 3. Extrusion head; 301. Extrusion channel; 4. Fixing rod; 5. Guide post; 6. First sealing disc; 601. First conveying hole; 7. First rotating disc; 701. First straight groove; 702. First annular groove; 703. Second straight groove; 704. Second annular groove; 705. First through hole; 8. Rotating sleeve; 801. Spiral groove; 9. Support plate; 901. Slide groove; 10. Sliding block; 11. 12. Limiting post; 13. Receiving plate; 14. Support sleeve; 15. Slot; 16. Support rod; 17. Movable ring; 18. Guide plate; 19. Limiting block; 20. First spring; 21. Second spring; 22. Supporting post; 23. Limiting ring; 24. Second sealing disc; 25. Conveying pipe; 26. Second rotating disc; 27. Guide groove; 28. Second guide hole; 29. ​​Pushing ring; 20. Connecting rod; 21. Corrugated pipe. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0047] Please see Figures 1-12 In this embodiment of the invention, a molding die for producing polyetheretherketone (PEEK) by mechanically recycling waste plastics includes:

[0048] The connecting plate 1 and the mold body 2 disposed on the connecting plate 1, the mold body 2 is provided with an extrusion head 3 at the end, and the extrusion head 3 is formed with symmetrically arranged extrusion channels 301;

[0049] Also includes:

[0050] A fixing rod 4 is set inside the mold body 2. A first sealing disc 6 slides axially on the fixing rod 4. A first rotating disc 7 is rotatably mounted on the first sealing disc 6. A second sealing disc 20 is set on the fixing rod 4. A second rotating disc 21 is rotatably mounted on the second sealing disc 20.

[0051] A trigger switching mechanism is set inside the mold body 2, and a follow-up adjustment mechanism connected to the trigger switching mechanism is set on the fixed rod 4.

[0052] The guiding mechanism is set on the first rotating disk 7 and the second rotating disk 21. When the first sealing disk 6 is pushed by pressure, the follow-up adjustment mechanism can first drive the first rotating disk 7 to rotate and then drive the second rotating disk 21 to rotate, so as to adjust the guiding state of the extrusion channel 301 through the guiding mechanism.

[0053] Specifically, in the production of polyetheretherketone (PEEK) from waste plastics, the PEEK derived from waste plastics may have insufficient monomer purity or unstable polymerization process, leading to a wider molecular weight distribution. Consequently, when the material is melted and conveyed into the mold body 2, inconsistent melt flow may occur, resulting in fluctuations in the extruded material. This leads to flow marks and uneven gloss on the surface of the extruded material, ultimately causing a decrease in the mechanical properties of the product. To address this, the first sealing disc 6 divides the mold body 2 into two cavities: a buffer cavity and an adjustment cavity. The buffer cavity is used for storing and discharging materials, while the adjustment cavity is kept free of materials. Initially, the mold body 2 is sealed by the guiding mechanism. When the melt enters the buffer cavity of the mold body 2, the pressure inside the buffer cavity increases with the amount of melt, thereby pushing... The first sealing disc 6 moves toward the second sealing disc 20, driving the trigger switching mechanism and the follow-up adjustment mechanism to move. When the pressure in the buffer cavity reaches the first-level set value, the first rotating disc 7 is controlled to rotate under the action of the trigger switching mechanism and the follow-up adjustment mechanism, and one of the extrusion channels 301 is controlled to open through the conduction mechanism. At this time, the material will be extruded through the extrusion channel 301. Under the action of the buffer cavity, it can compensate for or absorb the sudden increase or decrease of material caused by flow fluctuations, ensuring the uniformity of the extruded material. If the pressure in the buffer cavity continues to increase and reaches the second-level set value, the second rotating disc 21 is controlled to rotate under the action of the trigger switching mechanism and the follow-up adjustment mechanism, so that both extrusion channels 301 are open, ensuring that the material performance will not be poor due to pressure fluctuations.

[0054] Please see Figures 1-11The trigger switching mechanism includes a rotating sleeve 8 symmetrically arranged and rotatably mounted on the first rotating disk 7 and the second rotating disk 21, respectively. A guide post 5 penetrating the first sealing disk 6 and the second sealing disk 20 is provided inside the mold body 2. It also includes a guide assembly and a sliding assembly disposed on the rotating sleeve 8 for controlling the rotation of the first rotating disk 7 and the second rotating disk 21. The guide assembly includes a spiral groove 801 formed on the outer circumference of the rotating sleeve 8. A support plate 9 rotatably mounted on the rotating sleeve 8 and sliding axially with the guide post 5 is provided. A guide plate 15 is axially slidably connected to the guide post 5. The inner wall of the guide plate 15 is provided with a limiting block 1501 that slidably engages with the spiral groove 801. A first spring 16 is sleeved on the rotating sleeve 8. The two ends of the first spring 16 abut against the support plate 9 and the guide plate 15, respectively. The sliding assembly includes a sliding groove 901 formed on the support plate 9. A sliding block 10 is slidably installed in the sliding groove 901. Guide grooves are formed on the first rotating disk 7 and the second rotating disk 21. A limiting post 11 that slidably engages with the guide groove is provided on the side wall of the sliding block 10.

[0055] Please see Figures 3-11 The follow-up adjustment mechanism includes a receiving plate 12 mounted on the fixed rod 4, a support sleeve 13 hinged to the receiving plate 12, a support rod 14 axially sliding within the support sleeve 13 and hinged to the sliding block 10, a groove 1301 formed on the support sleeve 13, and a movable ring 1401 slidably connected to the groove 1301 at the end of the support rod 14. The follow-up adjustment mechanism also includes a limiting ring 19 mounted on the fixed rod 4, and the axial sliding of the fixed rod 4... A push ring 22 is provided that abuts against the limiting ring 19. A connecting rod 23 that is hinged to the push ring 22 and hinged to the sliding block 10 is provided on the push ring 22. A support column 18 that abuts against the push ring 22 is provided on the support plate 9. Two second springs 17 are symmetrically arranged on the fixed rod 4. The two ends of one second spring 17 abut against the push ring 22 and the guide plate 15 respectively, and the two ends of the other second spring 17 abut against the receiving plate 12 and the guide plate 15 respectively.

[0056] Please see Figure 4 In detail, the guide groove can be divided into four sections, namely the first straight groove 701, the first annular groove 702, the second straight groove 703, and the second annular groove 704. One end of the first annular groove 702 is connected to the end of the first straight groove 701, and the other end is connected to the second straight groove 703. One end of the second annular groove 704 is connected to the end of the second straight groove 703, and the other end is connected to the first straight groove 701. The extension lines of the first straight groove 701 and the second straight groove 703 intersect with the central axis of the fixed rod 4.

[0057] Please see Figure 5 , Figure 6 The first sealing disc 6 can slide axially along the fixed rod 4. When the mold body 2 is not filled with material, the distance between the first sealing disc 6 and the receiving plate 12 is the largest, making the size of the buffer cavity the smallest. At this time, the support column 18 and the pushing ring 22 are separated, the pushing ring 22 and the limiting ring 19 abut against each other, and the distance between the pushing ring 22 and the second sealing disc 20 is the largest. In this state, the distance between the pushing ring 22 and the second sealing disc 20 is equal to the distance between the first sealing disc 6 and the receiving plate 12. The guide plate 15 is located at the end of the stroke away from the support plate 9, so that the limiting block 1501 is located at the end of the stroke of the spiral groove 801 away from the support plate 9. In this state, the guide plate 15 is located at the end of the stroke away from the support plate 9. The distance between plate 15 and support plate 9 is the largest, and the distance between plate 15 and support plate 9 and push ring 22 is the smallest. The elongation of the first spring 16 in its natural state is greater than the maximum distance between guide plate 15 and support plate 9, and the elongation of the second spring 17 in its natural state is greater than the minimum distance between guide plate 15 and support plate 12 and push ring 22. Therefore, both the first spring 16 and the second spring 17 are in a pre-compressed state, and the elastic potential energy of the first spring 16 in this state is greater than the elastic potential energy of the second spring 17. The first spring 16 provides the guide plate 15 with a thrust in the direction away from support plate 9, while the second spring 17 provides the guide plate 15 with a thrust in the direction closer to support plate 9.

[0058] When the distance between the first sealing disc 6 and the receiving plate 12 is at its maximum, the size of the support sleeve 13 and the support rod 14 when they fit together is at its minimum, so that the movable ring 1401 is located at the end of the stroke on one side of the slot 1301. Under the action of the support sleeve 13 and the support rod 14, the two sliding blocks 10 are located at the end of the stroke on one side of the groove 901, and the distance between the two sliding blocks 10 is at its minimum, so that the limiting post 11 is located at the end of the stroke on the side of the first straight groove 701 away from the first annular groove 702. Under the action of the limiting post 11 and the first straight groove 701, the first rotating disc 7 and the second rotating disc 21 cannot rotate.

[0059] Since the support column 18 and the push ring 22 are still separated, the push ring 22 will not move when the first sealing disc 6 moves. Referring to the first rotating disc 7, the sliding block 10 is equipped with damping. When the sliding block 10 is not subjected to external force, its position within the groove 901 will not change. When material enters the buffer cavity of the mold body 2, the pressure within the buffer cavity gradually increases with continuous material transport, thereby pushing the first sealing disc 6 towards the receiving plate 12 and causing the first rotating disc 7 to move synchronously. The first rotating disc 7 will then drive the support plate 9 to move, thereby driving the first spring 16 and the sliding block 10 to move. Since the elastic potential energy of the first spring 16 is greater than that of the second spring 17, and the limiting column 11 and the first straight groove 701 restrict the first rotating disc 7 and the rotating sleeve... When the cylinder 8 rotates, the guide plate 15 slides along the axial direction of the guide post 5 under the action of the spiral groove 801 and the limiting block 1501, and moves synchronously with the first sealing disc 6. Under the action of the guide plate 15, the second spring 17 is compressed. At the same time, when the support plate 9 moves, the support rod 14 moves toward the support sleeve 13 under the action of the sliding block 10, so that the movable ring 1401 slides along the groove 1301. When the movable ring 1401 moves to the end of the stroke on the other side of the groove 1301, the size of the support sleeve 13 and the support rod 14 fitting together reaches the maximum. When the support plate 9 continues to move, the support sleeve 13 and the support rod 14 will perform a yaw action, so that the sliding block 10 slides along the length direction of the groove 901, and the two sliding blocks 10 move toward each other in a direction away from each other.

[0060] The sliding block 10 will drive the limiting post 11 to slide along the first straight groove 701. When the limiting post 11 moves to the position where the first straight groove 701 and the second annular groove 704 are connected, the elastic potential energy of the first spring 16 is still greater than the elastic potential energy of the second spring 17. As a result, the guide plate 15 still tends to move away from the support plate 9. Under the action of the limiting block 1501 and the spiral groove 801, it can be ensured that the first rotating disk 7 will not rotate. Therefore, the limiting post 11 will continue to slide along the first straight groove 701.

[0061] As the second spring 17 continues to compress, its elastic potential energy will exceed that of the first spring 16. When the limiting post 11 moves to the first straight groove 701 and the first annular groove 702, the buffer cavity reaches the first set value. The elastic potential energy of the second spring 17 is much greater than that of the first spring 16. At this time, the first rotating disk 7 is no longer locked. Since the guide post 5 has a guiding function, the guide plate 15 can only slide along the axial direction of the guide post 5 and will not rotate. The second spring 17 is released elastically and pushes the guide plate 15 to move towards the support plate 9, thereby causing the limiting block 1501 to slide along the spiral groove 801. The first spring 16 is compressed, and under the action of the limiting block 1501 and the spiral groove 801, the rotating sleeve 8 rotates rapidly, thereby driving the first rotating disk 7 to rotate rapidly. The limiting post 11 will slide along the first annular groove 702 relative to the first rotating disk 7 until the limiting post 11 moves to the position where the first annular groove 702 and the second straight groove 703 are connected. The first rotating disk 7 rotates to its maximum angle. Under the action of the guiding mechanism, one of the extrusion channels 301 is connected to the buffer cavity, so that the material in the buffer cavity is extruded and formed through the extrusion channel 301. At this time, the support post 18 just moves to the position where it abuts against the push ring 22.

[0062] During extrusion, if the amount of material entering the buffer cavity gradually decreases due to fluctuations, the second spring 17 is released elastically and pushes the rotating sleeve 8 to move via the guide plate 15, causing the first sealing disc 6 to move towards its initial position. At this time, under the action of the support sleeve 13 and the support rod 14, the two sliding blocks 10 move towards each other, so that the limiting post 11 slides along the second straight groove 703 and moves towards the second annular groove 704. During this process, the first sealing disc 6 controls the size of the buffer cavity to gradually decrease, thereby compensating for the decrease in material due to pressure fluctuations during extrusion and ensuring... Regarding the uniformity of the extruded material, when the limiting post 11 moves to the position where the second straight groove 703 and the second annular groove 704 are connected, it indicates that the material pressure in the buffer cavity is insufficient to maintain the uniformity of the material during extrusion. At this position, the elastic potential energy of the second spring 17 exceeds the elastic potential energy of the first spring 16. Therefore, the second spring 17 is released elastically and pushes the guide plate 15 to move away from the support plate 9. Under the action of the limiting block 1501 and the spiral groove 801, the first rotating disk 7 is controlled to rotate to the initial angle so as to control the separation of the extrusion channel 301 from the buffer cavity through the guiding mechanism, and the extrusion channel 301 no longer extrudes material.

[0063] Similarly, if the flow rate of material entering the buffer cavity gradually increases due to fluctuations, the first sealing disc 6 continues to move toward the receiving plate 12, causing the two sliding blocks 10 to continue to move toward each other, thereby controlling the limiting post 11 to move along the second straight groove 703 and toward the direction away from the second annular groove 704.

[0064] Simultaneously, the support column 18 will push the push ring 22 to move away from the limiting ring 19, thereby driving the two sliding blocks 10 that cooperate with the second rotating disk 21 to move away from each other through the connecting rod 23. This causes the limiting column 11 to slide along the first straight groove 701. The guide groove formed by the limiting column 11 on the second rotating disk 21 has the same movement trajectory as the guide groove formed by the limiting column 11 on the first rotating disk 7. This will not be elaborated further. When the limiting column 11 that cooperates with the second rotating disk 21 moves to the position where the first annular groove 702 and the first straight groove 701 are connected, under the action of the limiting block 1501 and the spiral groove 801, the second rotating disk 21 is controlled to rotate rapidly by the rotating sleeve 8. This allows the two extrusion channels 301 to be connected to the buffer cavity through the guiding mechanism, thereby achieving the effect of double-hole extrusion when the pressure in the buffer cavity increases to the secondary set value.

[0065] Preferably, through the cooperation of the limiting post 11 and the guide groove, when the pressure in the buffer cavity reaches the first or second set value, the first rotating disk 7 or the second rotating disk 21 is controlled to rotate to adjust the conduction state of the extrusion channel 301. During the extrusion process, regardless of whether the amount of material delivered to the buffer cavity increases or decreases due to fluctuations, the buffer cavity can perform corresponding storage or compensation actions to ensure the stability and uniformity of the extruded material. During the extrusion process, even if the pressure fluctuates at the first or second set value, it will not affect the normal discharge of the extrusion channel 301. When the pressure in the buffer cavity is lower than the extrusion pressure set by the extrusion channel 301, it will be re-sealed to allow the buffer cavity to continue storing material, thereby further ensuring that the mechanical properties of the material after extrusion are not lost.

[0066] Please see Figure 3 , Figure 5 , Figure 6 , Figure 12The guiding mechanism includes a first conveying hole 601 opened on the first sealing disk 6, a first guiding hole 705 opened on the first rotating disk 7 that is in communication with the first conveying hole 601, a conveying pipe 2001 connected to the extrusion channel 301 on the second sealing disk 20, a guiding groove 2101 and a second guiding hole 2102 opened on the second rotating disk 21, the guiding groove 2101 and the second guiding hole 2102 being in communication with the conveying pipe 2001, and the guiding mechanism also includes a corrugated pipe 24 disposed on the support plate 9 and in communication with the first guiding hole 705, the second guiding hole 2102 and the guiding groove 2101.

[0067] Furthermore, the angle formed by the guide groove 2101 in the circumferential direction is the same as the angle formed by the first annular groove 702 in the circumferential direction. Two bellows 24 are provided, and the two ends of one bellows 24 are sealed and abutted against the first rotating disk 7 and the second rotating disk 21. One end of the other bellows 24 abuts against the first rotating disk 7, and the other end passes through the guide groove 2101 and is connected to the conveying pipe 2001.

[0068] Initially, the first through hole 705 and the first conveying hole 601 are misaligned, causing the first conveying hole 601 to be blocked. Similarly, the second through hole 2102 and the conveying pipe 2001 are misaligned, causing the second through hole 2102 to be blocked. When the pressure inside the buffer cavity reaches a set value, the first rotating disk 7 rotates rapidly, causing the first through hole 705 to move to a position where it connects with the first conveying hole 601. At this time, the material inside the buffer cavity will enter the two bellows 24 through the first conveying hole 601 and the first through hole 705. Since the second through hole 2102 is blocked, at this time... Material can only be discharged through the corrugated pipe 24 that passes through the guide groove 2101 and is connected to the conveying pipe 2001, and is extruded through the extrusion channel 301. When the pressure in the buffer cavity reaches the secondary set value, the second rotating disk 21 rotates rapidly. Under the action of the guide groove 2101, the second rotating disk 21 will not interfere with the corrugated pipe 24, so that the corrugated pipe 24 is always connected to the conveying pipe 2001. The second rotating disk 21 will drive the second guide hole 2102 to move to the position connected to the other conveying pipe 2001. At this time, the material will be synchronously conveyed to the extrusion channel 301 through the two conveying pipes 2001 so that the material can be extruded through two holes.

[0069] Preferably, by cooperating with the first rotating disk 7 and the second rotating disk 21 through the guiding mechanism, the guiding state of the extrusion channel 301 can be adjusted, so as to achieve the effect of adaptively adjusting the extrusion rate according to the pressure in the buffer cavity.

[0070] A molding method for producing polyetheretherketone (PEEK) from waste plastics via mechanical recycling includes the following steps:

[0071] Step 1: The molten material is conveyed into the mold body 2 through the connecting plate 1;

[0072] Step 2: When the molten material inside the mold body 2 reaches the set pressure, it pushes the first sealing disc 6 to move, and drives the trigger switching mechanism to move;

[0073] Step 3: Under the action of the trigger switching mechanism, according to the pressure change inside the mold body 2, the first rotating disk 7 is controlled to rotate first through the follow-up adjustment mechanism, and then the second rotating disk 21 is controlled to rotate.

[0074] Step 4: The first rotating disk 7 and the second rotating disk 21 will drive the guiding mechanism to move, so as to adjust the guiding state of the extrusion channel 301.

[0075] 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 implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0076] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A molding die for producing polyetheretherketone (PEEK) from waste plastics via mechanical recycling, comprising: A connecting plate and a mold body disposed on the connecting plate, wherein an extrusion head is provided at the end of the mold body and an extrusion flow channel is formed inside the extrusion head in a symmetrical arrangement; Its characteristic is that it further includes: A fixing rod is set inside the mold body. A first sealing disc slides axially on the fixing rod. A first rotating disc is rotatably mounted on the first sealing disc. A second sealing disc is set on the fixing rod. A second rotating disc is rotatably mounted on the second sealing disc. A trigger switching mechanism is installed inside the mold body, and a follow-up adjustment mechanism connected to the trigger switching mechanism is installed on the fixed rod. The guiding mechanism is set on the first rotating disk and the second rotating disk. When the first sealing disk is pushed by pressure, the follow-up adjustment mechanism can first drive the first rotating disk to rotate by triggering the switching mechanism, and then drive the second rotating disk to rotate, so as to adjust the guiding state of the extrusion channel through the guiding mechanism. The trigger switching mechanism includes rotating sleeves that are symmetrically arranged and rotatably mounted on the first rotating disk and the second rotating disk respectively, and a guide post penetrating the first sealing disk and the second sealing disk is provided in the mold body; It also includes a guide assembly and a sliding assembly disposed on the rotating sleeve for controlling the rotation of the first rotating disk and the second rotating disk; The guiding assembly includes a spiral groove formed on the outer circumferential wall of the rotating sleeve, a support plate rotatably mounted on the rotating sleeve and sliding axially with the guide post, a guide plate slidably connected to the guide post on the axial side of the rotating sleeve, a limiting block provided on the inner wall of the guide plate and slidingly engaged with the spiral groove, and a first spring sleeved on the rotating sleeve, with both ends of the first spring abutting against the support plate and the guide plate respectively. The sliding assembly includes a groove formed on the support plate, a sliding block slidably installed in the groove, guide grooves formed on the first rotating disk and the second rotating disk, and a limiting post provided on the side wall of the sliding block to slide and engage with the guide groove. The guide groove can be divided into four sections: the first straight groove, the first annular groove, the second straight groove, and the second annular groove. One end of the first annular groove is connected to the end of the first straight groove, and the other end is connected to the second straight groove. One end of the second annular groove is connected to the end of the second straight groove, and the other end is connected to the first straight groove. The extension lines of the first straight groove and the second straight groove intersect with the central axis of the fixed rod. The follow-up adjustment mechanism includes a receiving plate disposed on the fixed rod, a support sleeve hinged to the receiving plate, a support rod hinged to the sliding block slidingly disposed axially inside the support sleeve, a groove formed on the support sleeve, and a movable ring slidably connected to the groove at the end of the support rod. The follow-up adjustment mechanism also includes a limiting ring disposed on the fixed rod, a pushing ring that abuts against the limiting ring is axially slidable on the fixed rod, a connecting rod that is hinged to the sliding block is hinged on the pushing ring, and a support column that abuts against the pushing ring is disposed on the support plate; Two second springs are symmetrically arranged on the fixed rod. One of the second springs abuts against the push ring and the guide plate at both ends, and the other second spring abuts against the receiving plate and the guide plate at both ends. When the mold body is not filled with material, both the first spring and the second spring are in a pre-compressed state, and the elastic potential energy of the first spring in this state is greater than that of the second spring. The guiding mechanism includes a first conveying hole on the first sealing disk, a first guiding hole on the first rotating disk that communicates with the first conveying hole, a conveying pipe on the second sealing disk that communicates with the extrusion channel, and a guiding groove and a second guiding hole on the second rotating disk, wherein the guiding groove and the second guiding hole communicate with the conveying pipe. The conduction mechanism also includes a bellows disposed on the support plate and in conduction cooperation with the first conduction hole, the second conduction hole, and the conduction groove.

2. A molding method for producing polyetheretherketone (PEEK) from mechanically recycled waste plastics, comprising using the molding die for producing PEEK from mechanically recycled waste plastics as described in claim 1, characterized in that... Includes the following steps: Step 1: The molten material is conveyed into the mold body through the connecting plate; Step 2: When the molten material inside the mold reaches the set pressure, it pushes the first sealing disc to move, which in turn drives the trigger switching mechanism to move. Step 3: Under the action of the trigger switching mechanism, according to the pressure change inside the mold body, the first rotating disk is controlled to rotate first through the follow-up adjustment mechanism, and then the second rotating disk is controlled to rotate. Step 4: The first and second rotating disks will drive the guiding mechanism to move, so as to adjust the guiding state of the extrusion channel.

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