Forming mold for producing polyether-ether-ketone by mechanically recovering waste plastic and forming method thereof

Abstract

The invention relates to the technical field of waste plastic recycling, forming and extruding, in particular to a forming die for producing polyether-ether-ketone through mechanical recycling of waste plastics and a forming method thereof.The forming die comprises a connecting disc and a die body arranged on the connecting disc, an extrusion head is arranged at the end of the die body, and symmetrically-arranged extrusion runners are formed in the extrusion head; the fixing rod is arranged in the mold body, a first sealing disc slides in the axial direction of the fixing rod, a first rotating disc is rotationally installed on the first sealing disc, a second sealing disc is arranged on the fixing rod, and a second rotating disc is rotationally installed on the second sealing disc; the trigger switching mechanism is arranged in the mold body, and a follow-up adjusting mechanism connected with the trigger switching mechanism is arranged on the fixing rod; according to the plastic extrusion mold, the conduction state of the extrusion runner can be automatically adjusted according to the change of the pressure intensity in the mold body, so that the stability of plastic extrusion is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of waste plastic recycling, molding and extrusion, in particular to a molding die and a molding method for producing polyetheretherketone by mechanically recycling waste plastic. Background Art

[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 equipment, automotive, electronics, and other fields.

[0003] When using waste plastics to produce polyetheretherketone, it is usually necessary to use mechanical crushing to crush the waste plastics, and after cleaning, generate polyetheretherketone through chemical reaction, and then extrude the polyetheretherketone through melt extrusion to obtain the final product.

[0004] During extrusion molding, a screw extruder is usually used in conjunction with an extrusion die for extrusion. The screw extruder heats and melts the material and conveys it to the extrusion die to obtain the desired product.

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

[0006] The object of the present invention is to provide a molding die and a molding method for producing polyetheretherketone by mechanically recycling waste plastics, so as to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: A molding die for producing polyetheretherketone by mechanically recycling waste plastics, comprising: A connecting disk and a mold body arranged on the connecting disk, an extrusion head is arranged at the end of the mold body, and symmetrical extrusion flow channels are formed in the extrusion head; Also includes: A fixed rod is provided in the mold body, a first sealing disc is axially slidably mounted on the fixed rod, a first rotating disc is rotatably mounted on the first sealing disc, a second sealing disc is provided on the fixed rod, and a second rotating disc is rotatably mounted on the second sealing disc; The trigger switching mechanism is arranged in the mold body, and the fixed rod is provided with a follow-up adjustment mechanism connected to the trigger switching mechanism; The conduction mechanism is arranged on the first rotating disk and the second rotating disk. The follow-up adjustment mechanism can trigger the switching mechanism to first drive the first rotating disk to rotate and then drive the second rotating disk to rotate when the first sealing disk is pushed by pressure, so as to adjust the conduction state of the extrusion channel through the conduction mechanism.

[0008] As a further solution of the present invention: the trigger switching mechanism includes rotating sleeves rotatably mounted on the first rotating disk and the second rotating disk and symmetrically arranged, and a guide column is provided in the mold body that passes through the first sealing disk and the second sealing disk; It also includes a guide assembly and a sliding assembly which are arranged on the rotating sleeve and are used to control the rotation of the first rotating disk and the second rotating disk.

[0009] As a further solution of the present invention: the guide assembly includes a spiral groove formed on the outer wall of the circumference of the rotating sleeve, a support plate is rotatably mounted on the rotating sleeve and slides axially with the guide column, the axial sliding of the rotating sleeve has a guide plate slidably connected to the guide column, the inner wall of the guide plate is provided with a limit block slidably engaged with the spiral groove, and a first spring is sleeved on the rotating sleeve, and the two ends of the first spring are respectively abutted against the support plate and the guide plate.

[0010] As a further solution 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, a guide groove is formed on the first rotating disk and the second rotating disk, and the side wall of the sliding block is provided with a limiting column that is slidably engaged with the guide groove.

[0011] As a further solution of the present invention: the follow-up adjustment mechanism includes a receiving plate arranged on the fixed rod, a support sleeve is hinged on the receiving plate, a support rod hinged to the sliding block slides axially in the support sleeve, a slot is formed on the support sleeve, and a movable ring is provided at the end of the support rod that is slidably connected to the slot.

[0012] As a further solution of the present invention: the follow-up adjustment mechanism also includes a limiting ring arranged on the fixed rod, the axial sliding of the fixed rod is provided with a pushing ring that interferes with the limiting ring, the pushing ring is hinged with a connecting rod hinged with the sliding block, and the support plate is provided with a support column that interferes with the pushing ring.

[0013] As a further solution of the present invention: two second springs are symmetrically arranged on the fixing rod, wherein the two ends of one of the second springs are respectively abutted against the push ring and the guide plate, and the two ends of the other second spring are respectively abutted against the receiving plate and the guide plate.

[0014] As a further solution of the present invention: the conducting mechanism includes a first conveying hole provided on the first sealing disk, a first conducting hole provided on the first rotating disk and conducting and cooperating with the first conveying hole, a conveying pipe connected to the extrusion flow channel is connected on the second sealing disk, a conducting groove and a second conducting hole are provided on the second rotating disk, and the conducting groove and the second conducting hole are conducting and cooperating with the conveying pipe.

[0015] As a further solution of the present invention: the conduction mechanism further includes a bellows provided on the support plate and conductingly cooperating with the first conduction hole, the second conduction hole and the conduction groove.

[0016] A molding method for producing polyetheretherketone by mechanically recycling waste plastics comprises the following steps: Step 1: The molten material is transported into the mold body through the connecting plate; Step 2: When the molten material in the mold body reaches the set pressure, the first sealing disk is pushed to move, and the trigger switching mechanism is driven to move; Step 3: Under the action of the trigger switching mechanism, according to the pressure change in the mold body, the follow-up adjustment mechanism controls the first rotating disk to rotate first, and then controls the second rotating disk to rotate; Step 4: The first rotating disk and the second rotating disk will drive the conduction mechanism to move to adjust the conduction state of the extrusion flow channel.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present application can adaptively adjust the conduction state of the extrusion channel according to the pressure change in the mold body to ensure the uniformity and stability of material extrusion. Specifically, when the pressure in the buffer cavity increases, the first sealing disk is pushed to move toward the second sealing disk. When the pressure in the buffer cavity reaches the first-level set value, the first rotating disk 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 conductive 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 or absorb the sudden increase or decrease of the material caused by flow fluctuations, thereby 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 disk is controlled to rotate under the action of the trigger switching mechanism and the follow-up adjustment mechanism, so that both extrusion channels are conductive, thereby ensuring that the material performance after extrusion will not be poor due to pressure fluctuations.

[0018] Through the cooperation of the limit column and the guide groove, when the pressure in the buffer cavity reaches the first set value or the second set value, the first rotating disk or the second rotating disk can be controlled to rotate accordingly to adjust the conduction state of the extrusion channel. During the extrusion process, no matter whether the amount of material delivered to the buffer cavity increases or decreases due to fluctuations, the buffer cavity can make corresponding storage or compensation actions to ensure the stability and uniformity of the extruded material. During the extrusion process, even if the pressure is in a fluctuating state of the first set value or the second set value, 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 for the extrusion channel, it will be re-blocked so that the buffer cavity continues to store material to further ensure that the mechanical properties of the material will not be lost after extrusion.

[0019] By cooperating with the conduction mechanism and the first rotating disk and the second rotating disk, the conduction state of the extrusion flow channel can be adjusted, so as to achieve the effect of adaptively adjusting the extrusion rate according to the pressure in the buffer cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a structural schematic diagram of an embodiment of a molding die for producing polyetheretherketone by mechanically recycling waste plastics.

[0021] Figure 2 This is a structural schematic diagram from another angle of an embodiment of a molding die for producing polyetheretherketone by mechanically recycling waste plastics.

[0022] Figure 3 The present invention is a schematic cross-sectional structure diagram of a mold body and an extrusion head in one embodiment of a molding mold for producing polyetheretherketone by mechanically recycling waste plastics.

[0023] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A.

[0024] Figure 5 This is a schematic diagram of the structure inside the mold body in one embodiment of a molding mold for producing polyetheretherketone by mechanically recycling waste plastics.

[0025] Figure 6 for Figure 5 Schematic diagram of the structure from another angle.

[0026] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point B.

[0027] Figure 8 A schematic diagram of the connection relationship between a partial trigger switching mechanism, a partial follow-up adjustment mechanism, and a partial conduction mechanism in an embodiment of a molding die for producing polyetheretherketone by mechanically recycling waste plastics.

[0028] Figure 9 A schematic diagram of the explosion structure of a partial trigger switching mechanism and a partial follow-up adjustment mechanism in an embodiment of a molding die for producing polyetheretherketone by mechanically recycling waste plastics.

[0029] Figure 10 A schematic structural diagram of a partial trigger switching mechanism, a partial follow-up adjustment mechanism, a second sealing disk, and a second rotating disk in one embodiment of a molding die for producing polyetheretherketone by mechanically recycling waste plastics.

[0030] Figure 11 A schematic diagram of the exploded structure of a partial trigger switching mechanism, a partial follow-up adjustment mechanism, and a partial conduction mechanism in one embodiment of a molding die for producing polyetheretherketone by mechanically recycling waste plastics.

[0031] Figure 12 This is a schematic diagram of the explosion structure of the conduction mechanism in one embodiment of a molding die for producing polyetheretherketone by mechanically recycling waste plastics.

[0032] In the figure: 1, connecting plate; 2, mold body; 3, extrusion head; 301, extrusion flow channel; 4, fixing rod; 5, guide column; 6, first sealing plate; 601, first delivery hole; 7, first rotating plate; 701, first straight groove; 702, first annular groove; 703, second straight groove; 704, second annular groove; 705, first conducting hole; 8, rotating sleeve; 801, spiral groove; 9, support plate; 901, slide groove; 10, sliding block; 11, Limiting column; 12. Socket plate; 13. Support sleeve; 1301. Card slot; 14. Support rod; 1401. Movable ring; 15. Guide plate; 1501. Limiting block; 16. First spring; 17. Second spring; 18. Supporting column; 19. Limiting ring; 20. Second sealing disk; 2001. Delivery pipe; 21. Second rotating disk; 2101. Conducting groove; 2102. Second conducting hole; 22. Pushing ring; 23. Connecting rod; 24. Bellows. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0035] See also Figures 1 to 12 In an embodiment of the present invention, a forming mold for producing polyetheretherketone by mechanically recycling waste plastics comprises: A connecting disc 1 and a mold body 2 disposed on the connecting disc 1. An extrusion head 3 is disposed at the end of the mold body 2. A symmetrically arranged extrusion flow channel 301 is formed in the extrusion head 3. Also includes: A fixed rod 4 is provided in the mold body 2. A first sealing disc 6 is axially slidably mounted on the fixed rod 4. A first rotating disc 7 is rotatably mounted on the first sealing disc 6. A second sealing disc 20 is provided on the fixed rod 4. A second rotating disc 21 is rotatably mounted on the second sealing disc 20. The trigger switching mechanism is provided in the mold body 2, and the fixed rod 4 is provided with a follow-up adjustment mechanism connected to the trigger switching mechanism; The conduction mechanism is arranged 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 trigger the switching mechanism to first drive the first rotating disk 7 to rotate, and then drive the second rotating disk 21 to rotate, so as to adjust the conduction state of the extrusion channel 301 through the conduction mechanism.

[0036] Specifically, when producing polyetheretherketone from waste plastics, the polyetheretherketone derived from waste plastics may have a wider molecular weight distribution due to insufficient monomer purity or unstable polymerization process. Then, when the material is melted and transported to the mold body 2, inconsistent melt fluidity may occur, and the extruded material may fluctuate, resulting in flow marks and uneven gloss on the surface of the extruded material, which ultimately leads to a decrease in the mechanical properties of the product. To this end, the first sealing disk 6 separates the mold body 2 into two cavities, which are a buffer cavity and an adjustment cavity. The buffer cavity is used to store and discharge materials, and no material will enter the adjustment cavity. In the initial state, under the action of the conduction mechanism, the mold body 2 is in a blocked state. When the melt enters the buffer cavity of the mold body 2, as the amount of the melt increases, the pressure in the buffer cavity increases, thereby promoting The first sealing disk 6 moves toward the second sealing disk 20, and drives the trigger switching mechanism and the follow-up regulating mechanism to move. When the pressure in the buffer cavity reaches the first-level set value, under the action of the trigger switching mechanism and the follow-up regulating mechanism, the first rotating disk 7 is controlled to rotate, and one of the extrusion channels 301 is controlled to be conductive 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 the material caused by flow fluctuations, thereby ensuring the uniformity of the extruded material. If the pressure in the buffer cavity continues to increase and reaches the second-level set value, under the action of the trigger switching mechanism and the follow-up regulating mechanism, the second rotating disk 21 is controlled to rotate, so that both extrusion channels 301 are conductive, thereby ensuring that the material performance after extrusion will not be poor due to pressure fluctuations.

[0037] See also Figures 1-11 The trigger switching mechanism includes a rotating sleeve 8 symmetrically mounted on the first rotating disk 7 and the second rotating disk 21, and a guide column 5 penetrating the first sealing disk 6 and the second sealing disk 20 is provided in the mold body 2; and further includes a guide assembly and a sliding assembly provided on the rotating sleeve 8 for controlling the rotation of the first rotating disk 7 and the second rotating disk 21, the guide assembly including a spiral groove 801 formed on the outer wall of the circumference of the rotating sleeve 8, a support plate 9 axially sliding with the guide column 5 is rotatably mounted on the rotating sleeve 8, and the rotating sleeve 8 is provided with a plurality of guide columns 5 for sliding along the first and second sealing disks 6 and 20. A guide plate 15 is axially slidably connected to the guide column 5, and the inner wall of the guide plate 15 is provided with a limit block 1501 that slides and engages with the spiral groove 801. A first spring 16 is sleeved on the rotating sleeve 8, and the two ends of the first spring 16 are respectively in contact with the support plate 9 and the guide plate 15. The sliding assembly includes a slide groove 901 formed on the support plate 9, and a sliding block 10 is slidably installed in the slide groove 901. Guide grooves are formed on the first rotating disk 7 and the second rotating disk 21, and the side wall of the sliding block 10 is provided with a limit column 11 that slides and engages with the guide groove.

[0038] See also Figure 3-Figure 11 The following adjustment mechanism includes a receiving plate 12 provided on the fixed rod 4, a support sleeve 13 is hinged on the receiving plate 12, a support rod 14 hinged to the sliding block 10 is axially slidable in the support sleeve 13, a card slot 1301 is formed on the support sleeve 13, and a movable ring 1401 is provided at the end of the support rod 14 for sliding connection with the card slot 1301. The following adjustment mechanism also includes a limiting ring 19 provided on the fixed rod 4, and the axial sliding of the fixed rod 4 There is a pushing ring 22 that cooperates with the limiting ring 19, and a connecting rod 23 hinged to the pushing ring 22 is hinged to the sliding block 10. The support plate 9 is provided with a support column 18 that cooperates with the pushing ring 22. Two second springs 17 are symmetrically arranged on the fixing rod 4, and the two ends of one of the second springs 17 are respectively in contact with the pushing ring 22 and the guide plate 15, and the two ends of the other second spring 17 are respectively in contact with the receiving plate 12 and the guide plate 15.

[0039] See also 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 fixing rod 4. See also Figure 5 、 Figure 6, the first sealing disk 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 disk 6 and the receiving plate 12 is the largest, so that the size of the buffer cavity is the smallest. At this time, the support column 18 and the push ring 22 are in a separated state, the push ring 22 and the limit ring 19 abut against each other, and the distance between them and the second sealing disk 20 is the largest. In this state, the distance between the push ring 22 and the second sealing disk 20 is equal to the distance between the first sealing disk 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 limit 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 The distance between the plate 15 and the support plate 9 is the largest, and the distance between the plate 15 and the receiving plate 12 and the push ring 22 is the smallest. The elongation of the first spring 16 in the natural state is greater than the maximum distance between the guide plate 15 and the support plate 9, and the elongation of the second spring 17 in the natural state is greater than the minimum distance between the guide plate 15 and the receiving plate 12 and the push ring 22. Therefore, the first spring 16 and the second spring 17 are both 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 a thrust to the guide plate 15 in the direction away from the support plate 9, while the second spring 17 provides a thrust to the guide plate 15 in the direction close to the support plate 9. When the distance between the first sealing disk 6 and the receiving plate 12 is the largest, the size of the mutual fitting of the support sleeve 13 and the support rod 14 is the smallest, so that the movable ring 1401 is located at the end of the stroke on the 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 the side of the slide groove 901, and the distance between the two sliding blocks 10 is minimized, 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 disk 7 and the second rotating disk 21 cannot rotate; Since the support column 18 and the push ring 22 are still in a separated state, when the first sealing disk 6 moves, the push ring 22 will not move. Taking the first rotating disk 7 as an example, a damping is provided on the sliding block 10. When the sliding block 10 is not subjected to external force, the position of the sliding block 10 in the slide groove 901 will not change. When the material enters the buffer cavity of the mold body 2, as the material is continuously conveyed, the pressure in the buffer cavity gradually increases, thereby pushing the first sealing disk 6 toward the receiving plate 12 and driving the first rotating disk 7 to move synchronously. The first rotating disk 7 will 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 the elastic potential energy of the second spring 17, and the limiting column 11 and the first straight slot 701 limit the first rotating disk 7 and the rotating sleeve The cylinder 8 rotates. In response, under the action of the spiral groove 801 and the limit block 1501, the guide plate 15 slides along the axial direction of the guide column 5 and moves synchronously with the first sealing disk 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, under the action of the sliding block 10, the support rod 14 moves toward the inside of the support sleeve 13, 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 mutual fit between the support sleeve 13 and the support rod 14 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 slide groove 901, and the two sliding blocks 10 move in the direction away from each other. The sliding block 10 drives the limiting post 11 to slide along the first straight groove 701. When the limiting post 11 moves to the connecting position between the first straight groove 701 and the second annular groove 704, the elastic potential energy of the first spring 16 is still greater than the elastic potential energy of the second spring 17. Therefore, 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, the first rotating disk 7 is prevented from rotating. Therefore, the limiting post 11 will continue to slide along the first straight groove 701. As the second spring 17 continues to compress, its elastic potential energy will exceed the elastic potential energy of the first spring 16. When the limit post 11 moves to the first straight groove 701 and the first annular groove 702, the buffer cavity reaches a first set value. The elastic potential energy of the second spring 17 is much greater than the elastic potential energy 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 axially along the guide post 5 and will not rotate. The second spring 17 is elastically released and pushes the guide plate 15 to move toward the direction close to the support plate 9, thereby driving the limit block 1501 to slide along the spiral groove 801 , and compresses the first spring 16. Under the action of the limit block 1501 and the spiral groove 801, the rotating sleeve 8 rotates rapidly to drive the first rotating disk 7 to rotate rapidly. The limit column 11 will slide along the first annular groove 702 relative to the first rotating disk 7 until the limit column 11 moves to the connection position of the first annular groove 702 and the second straight groove 703. The rotation angle of the first rotating disk 7 reaches the maximum. Under the action of the conduction mechanism, one of the extrusion channels 301 and the buffer cavity is connected to each other, so that the material in the buffer cavity is extruded and formed through the extrusion channel 301. At this time, the support column 18 just moves to the abutment position with the push ring 22.

[0040] During the extrusion process, if the amount of material entering the buffer cavity gradually decreases due to fluctuations, the second spring 17 is elastically released and pushes the rotating sleeve 8 to move through the guide plate 15, so that the first sealing disk 6 moves toward the initial position. At this time, under the action of the support sleeve 13 and the support rod 14, the two sliding blocks 10 move toward each other, so that the limiting column 11 slides along the second straight groove 703 and moves toward the second annular groove 704. In this process, the first sealing disk 6 controls the size of the buffer cavity to gradually decrease, thereby compensating for the reduction of material caused by pressure fluctuations during the extrusion process, ensuring The uniformity of the extruded material, when the limit column 11 moves to the connection position between the second straight groove 703 and the second annular groove 704, it means that the material pressure in the buffer cavity is not enough 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 elastically released and pushes the guide plate 15 to move in the direction away from the support plate 9. Under the action of the limit 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 and the buffer cavity through the conduction mechanism, and the extrusion channel 301 no longer extrudes material.

[0041] Similarly, if the amount of material entering the buffer cavity gradually increases due to fluctuations, the first sealing disk 6 continues to move toward the receiving plate 12, causing the two sliding blocks 10 to continue to move away from each other, thereby controlling the limiting post 11 to move along the second straight groove 703 and in a direction away from the second annular groove 704; At the same time, the support column 18 will push the pushing ring 22 to move in the direction away from the limiting ring 19, thereby driving the two sliding blocks 10 cooperating with the second rotating disk 21 to move in the direction away from each other through the connecting rod 23, so that the limiting column 11 slides along the first straight groove 701, and 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. No further details will be given on this. When the limiting column 11 cooperating with the second rotating disk 21 moves to the position where the first annular groove 702 is connected to the first straight groove 701, under the action of the limiting block 1501 and the spiral groove 801, the second rotating disk 21 is controlled to rotate rapidly by rotating the sleeve 8, so that the two extrusion channels 301 are controlled to be connected to the buffer cavity through the conducting mechanism, thereby achieving the effect of double-hole extrusion when the pressure in the buffer cavity increases to the secondary set value.

[0042] Preferably, through the cooperation between the limit column 11 and the guide groove, when the pressure in the buffer cavity reaches the first set value or the second set value, the first rotating disk 7 or the second rotating disk 21 can be controlled to rotate accordingly to adjust the conduction state of the extrusion channel 301, and 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 make corresponding storage or compensation actions to ensure the stability and uniformity of the extruded material, and during the extrusion process, even if the pressure is in a fluctuating state of the first set value or the 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 for the extrusion channel 301, it will be re-blocked so that the buffer cavity continues to store material to further ensure that the mechanical properties of the material will not be lost after extrusion.

[0043] See also Figure 3 、 Figure 5 、 Figure 6 、 Figure 12The conducting mechanism includes a first conveying hole 601 provided on the first sealing disk 6, a first conducting hole 705 which is in conduction with the first conveying hole 601 is provided on the first rotating disk 7, a conveying pipe 2001 which is in conduction with the extrusion flow channel 301 is connected to the second sealing disk 20, a conducting groove 2101 and a second conducting hole 2102 are provided on the second rotating disk 21, the conducting groove 2101 and the second conducting hole 2102 are in conduction with the conveying pipe 2001, and the conducting mechanism also includes a bellows 24 which is provided on the support plate 9 and is in conduction with the first conducting hole 705, the second conducting hole 2102 and the conducting groove 2101.

[0044] Furthermore, the angle formed by the conducting 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 of the 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 conducting groove 2101 and is connected to the delivery pipe 2001.

[0045] In the initial state, the first conducting hole 705 and the first conveying hole 601 are in a misaligned state, so that the first conveying hole 601 is in a blocked state, and the second conducting hole 2102 and the conveying pipe 2001 are also in a misaligned state, so that the second conducting hole 2102 is in a blocked state. When the pressure in the buffer cavity reaches the first set value, the first rotating disk 7 rotates rapidly, so that the first conducting hole 705 moves to the conducting position with the first conveying hole 601. At this time, the material in the buffer cavity will enter the two bellows 24 through the first conveying hole 601 and the first conducting hole 705. Since the second conducting hole 2102 is in a blocked state, at this time, The material can only be discharged through the bellows 24 that passes through the conducting groove 2101 and is connected to the delivery 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 conducting groove 2101, the second rotating disk 21 will not interfere with the bellows 24, so that the bellows 24 is always connected to the delivery pipe 2001. The second rotating disk 21 will drive the second conducting hole 2102 to move to a position connected to the other delivery pipe 2001. At this time, the material will be synchronously delivered to the extrusion channel 301 through the two delivery pipes 2001, so that the material is extruded through two holes. Preferably, the conduction state of the extrusion channel 301 can be adjusted by cooperating with the conduction mechanism and the first rotating disk 7 and the second rotating disk 21, so as to achieve the effect of adaptively adjusting the extrusion rate according to the pressure in the buffer cavity.

[0046] A molding method for producing polyetheretherketone by mechanically recycling waste plastics comprises the following steps: Step 1: The molten material is transported into the mold body 2 through the connecting plate 1; Step 2: When the molten material in the mold body 2 reaches the set pressure, the first sealing disk 6 is pushed to move, and the trigger switching mechanism is driven to move; Step 3: Under the action of the trigger switching mechanism, according to the pressure change in the mold body 2, the follow-up adjustment mechanism controls the first rotating disk 7 to rotate first, and then controls the second rotating disk 21 to rotate; Step 4: The first rotating disk 7 and the second rotating disk 21 will drive the conduction mechanism to move to adjust the conduction state of the extrusion channel 301.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0048] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A molding die for producing polyetheretherketone by mechanically recycling waste plastics, comprising: A connecting disk and a mold body arranged on the connecting disk, an extrusion head is arranged at the end of the mold body, and symmetrical extrusion flow channels are formed in the extrusion head; It is characterized by further comprising: A fixed rod is provided in the mold body, a first sealing disc is axially slidably mounted on the fixed rod, a first rotating disc is rotatably mounted on the first sealing disc, a second sealing disc is provided on the fixed rod, and a second rotating disc is rotatably mounted on the second sealing disc; The trigger switching mechanism is arranged in the mold body, and the fixed rod is provided with a follow-up adjustment mechanism connected to the trigger switching mechanism; The conduction mechanism is arranged on the first rotating disk and the second rotating disk. The follow-up adjustment mechanism can trigger the switching mechanism to first drive the first rotating disk to rotate and then drive the second rotating disk to rotate when the first sealing disk is pushed by pressure, so as to adjust the conduction state of the extrusion channel through the conduction mechanism.

2. A forming die for producing polyetheretherketone by mechanically recycling waste plastics according to claim 1, characterized in that: The trigger switching mechanism includes rotating sleeves rotatably mounted on the first rotating disk and the second rotating disk and symmetrically arranged, and a guide column 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 which are arranged on the rotating sleeve and are used to control the rotation of the first rotating disk and the second rotating disk.

3. A forming die for producing polyetheretherketone by mechanically recycling waste plastics according to claim 2, characterized in that: The guide assembly includes a spiral groove formed on the outer wall of the rotating sleeve, a support plate rotatably mounted on the rotating sleeve and axially sliding with the guide column, the axial sliding of the rotating sleeve includes a guide plate slidably connected to the guide column, the inner wall of the guide plate is provided with a limit block slidably engaged with the spiral groove, and a first spring is sleeved on the rotating sleeve, and the two ends of the first spring are respectively in contact with the support plate and the guide plate.

4. A forming die for producing polyetheretherketone by mechanically recycling waste plastics according to claim 3, characterized in that: The sliding assembly includes a sliding groove formed on the support plate, a sliding block is slidably installed in the sliding groove, a guide groove is formed on the first rotating disk and the second rotating disk, and a limiting column is provided on the side wall of the sliding block to slide and engage with the guide groove.

5. The forming die for producing polyetheretherketone by mechanically recycling waste plastics according to claim 4, characterized in that: The follow-up adjustment mechanism includes a receiving plate arranged on the fixed rod, a support sleeve is hinged on the receiving plate, a support rod hinged to the sliding block slides axially in the support sleeve, a slot is formed on the support sleeve, and a movable ring is provided at the end of the support rod that is slidably connected to the slot.

6. The forming die for producing polyetheretherketone by mechanically recycling waste plastics according to claim 5, characterized in that: The follow-up adjustment mechanism also includes a limiting ring arranged on the fixed rod, the axial sliding of the fixed rod is provided with a pushing ring that interferes with the limiting ring, the pushing ring is hinged with a connecting rod hinged with the sliding block, and the support plate is provided with a support column that interferes with the pushing ring.

7. The forming die for producing polyetheretherketone by mechanically recycling waste plastics according to claim 6, characterized in that: The fixing rod is sleeved with two symmetrically arranged second springs, wherein two ends of one of the second springs respectively abut against the push ring and the guide plate, and two ends of the other second spring respectively abut against the receiving plate and the guide plate.

8. The forming die for producing polyetheretherketone by mechanically recycling waste plastics according to claim 3, characterized in that: The conducting mechanism includes a first conveying hole provided on the first sealing disk, a first conducting hole provided on the first rotating disk to conduct with the first conveying hole, a conveying pipe connected to the extrusion flow channel is connected on the second sealing disk, a conducting groove and a second conducting hole provided on the second rotating disk, and the conducting groove and the second conducting hole are conducted with the conveying pipe.

9. The forming die for producing polyetheretherketone by mechanically recycling waste plastics according to claim 8, characterized in that: The conducting mechanism further includes a bellows disposed on the support plate and conductingly cooperating with the first conducting hole, the second conducting hole and the conducting groove.

10. A molding method for producing polyetheretherketone by mechanically recycling waste plastics, using the molding die for producing polyetheretherketone by mechanically recycling waste plastics according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: The molten material is transported into the mold body through the connecting plate; Step 2: When the molten material in the mold body reaches the set pressure, the first sealing disk is pushed to move, and the trigger switching mechanism is driven to move; Step 3: Under the action of the trigger switching mechanism, according to the pressure change in the mold body, the follow-up adjustment mechanism controls the first rotating disk to rotate first, and then controls the second rotating disk to rotate; Step 4: The first rotating disk and the second rotating disk will drive the conduction mechanism to move to adjust the conduction state of the extrusion flow channel.

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