A system for regenerating high-performance PVC plastic particles from waste plastics

Abstract

The present invention relates to the field of plastic recycling technology, and discloses a system for regenerating high-performance PVC plastic particles using waste plastics, including a stirring part, the stirring part includes a screw for transmitting molten plastic, a round rod is fixedly connected to the other end of the screw, a mixing part is arranged at one end of the round rod away from the screw, and a dosing tube for inputting a compatibilizer is suspended above the round rod near the outer surface of the mixing part. The present invention can store a quantitative amount of compatibilizer and molten plastic in the cavity formed by disk one and disk two, after disk two and disk three are attached, the extrusion of the wedge block by the limiting groove reaches the maximum value, and the positioning ring forms a complete circular ring, thereby engaging and limiting the outer side of the guide shaft, the guide shaft rotates to drive disk two and disk three to rotate, the rotation of disk three drives the fixed rod to rotate, and the fixed rod rotates to stir and mix the compatibilizer and molten plastic in the cavities of disk two and disk one.

Description

Technical Field

[0001] The invention relates to the technical field of plastic recycling, and in particular to a system for regenerating high-performance PVC plastic particles by utilizing waste plastics. Background Art

[0002] PVC is a common plastic material, which is waste plastic converted into reusable plastic particles through the steps of collection, sorting, crushing, cleaning, drying, melting and pelletizing. However, in real life, waste plastics come from various sources and often contain a variety of materials. If only a single material is recycled, some waste plastics may be difficult to separate by physical or chemical methods and require more sophisticated separation and purification steps. For example, waste plastics may contain a variety of different types of plastics, such as PE, PP, PET, PVC, etc. Their physical and chemical properties are similar and difficult to distinguish by the naked eye or simple methods. In addition, the performance of the final product of a single material plastic product cannot meet the current needs well. Therefore, when recycling some waste plastics, the waste plastics are usually not completely separated according to the material. After separation, different types of plastics are melted and mixed to make mixed plastic products, which broadens the scope of use of plastics and improves the performance of products.

[0003] Although some plastics have certain similarities in chemical structure and can be fused under certain conditions, if you want to mix and melt to form a uniform mixture, you need to add a suitable compatibilizer after the plastic is melted. However, the screw drives the molten mixture to move continuously, and the mixture in the barrel may not be completely evenly distributed. In addition, there may be plastic solids and semi-molten plastics in the mixture, which may also make the dispersion of the compatibilizer in the plastic matrix uneven. The manufactured mixed plastic is prone to local performance differences. In view of this, the present invention provides a system for regenerating high-performance PVC plastic particles using waste plastics. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a system for recycling high-performance PVC plastic particles using waste plastics, which can effectively solve the problem of uneven mixing ratio of compatibilizer and molten plastic in the prior art, and the problem that the produced mixed plastics are prone to local performance differences.

[0006] Technical Solution

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

[0008] The present invention provides a system for regenerating high-performance PVC plastic particles using waste plastics, comprising a frame, a feeding part for plastic input is provided on the upper surface of the frame, and an adding part for conveying a compatibility agent is provided on the upper surface of the frame, and the feeding part and the adding part are arranged in sequence from right to left;

[0009] A stirring part, the stirring part includes a screw for conveying molten plastic, the other end of the screw is fixedly connected to a round rod, the end of the round rod away from the screw is provided with a mixing part, and a dosing tube for inputting a compatible agent is suspended above the round rod near the outer surface of the mixing part, and the top end of the dosing tube is fixedly connected to the bottom end of the adding part;

[0010] The mixing part includes a disc 1 embedded in the frame, a guide shaft is rotatably connected to the middle of the disc 1, a disc 2 is sleeved on the outer side of the guide shaft, and in an initial state, the disc 1 and the disc 2 are fitted with each other, two compression springs are symmetrically arranged on the side of the disc 2 away from the disc 1 with the guide shaft as the center, a circular groove is symmetrically opened on the same side of the disc 2, one end of the compression spring away from the disc 2 is elastically connected to the disc 3, and two fixing rods are symmetrically fixed on the side of the disc 3 close to the disc 2, and the fixing rods coincide with the center line of the circular groove, and after the disc 2 moves from the fitting state with the disc 1 to the fitting state with the disc 3, the cavity formed by the disc 1 and the disc 2 can store a certain amount of compatibility agent and molten plastic, and the interior of the cavity is stirred by the fixing rod;

[0011] Among them, the outer surface of the second circumference of the disc is provided with a cleaning strip that can clean the inner wall of the rack after unloading.

[0012] Furthermore, the disc 1 is internally connected to the one-way valve 1 through rotation, and the one-way valve 1 is closed when the pressures on both sides of the disc 1 are equal.

[0013] Furthermore, a clamping ring is fixedly connected to the side of the second disk close to the third disk, and a magnetic material is arranged on the side of the clamping ring. A spacer that is slidably sealed with the outer surface of the guide shaft is elastically connected to the side of the second disk away from the third disk.

[0014] A sliding groove coinciding with the center line of the snap ring is provided at the center position of the inner part of the second disk, a positioning ring is slidably connected to the inner wall of the sliding groove, a connecting piece is elastically connected to the outer surface of the circumference of the positioning ring, and a wedge is elastically connected to the other end of the connecting piece, and the wedge is located in the middle of the circular groove in the initial state;

[0015] The side of the circular groove away from the disc three is rotatably connected with a one-way valve two.

[0016] Furthermore, a positioning groove is provided on the outer circumferential surface of the guide shaft near the disk three, and a positioning block is fixedly connected to the bottom end of the positioning ring and is engaged with the positioning groove.

[0017] Furthermore, a limiting groove is provided on one side of the fixing rod close to the guide shaft, the end of the limiting groove close to the disk two is in an open state, the end of the limiting groove close to the disk three is set as an inclined surface, and the inclined surface of the limiting groove fits with the inclined surface of the wedge block.

[0018] Furthermore, a clamping groove which is magnetically connected to the clamping ring is provided in the middle of the disk three near the disk two.

[0019] Furthermore, two cylinders are symmetrically fixed to one side of the disk three away from the disk two, and the inner wall of the cylinder is in contact with the end of the compression spring away from the disk two.

[0020] Furthermore, a blanking piece is provided at the bottom end of the inner wall of the frame, and a side edge of the blanking piece is close to the side edge of the first disk and close to the second disk. Beneficial Effects

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

[0022] The present invention can store a fixed amount of compatibilizer and molten plastic in the cavity formed by the first and second disks. After the second disk is attached to the third disk, the extrusion of the inclined surface of the limiting groove on the wedge block reaches the maximum value, and the positioning ring is completely closed under the force of the wedge block and the connecting member moving downward to form a complete circular ring, thereby engaging and limiting the outer side of the guide shaft. At this time, the second disk, the guide shaft and the third disk are fixed to each other and regarded as a whole. The rotation of the guide shaft drives the second disk and the third disk to rotate, and the rotation of the third disk drives the fixed rod to rotate. The fixed rod rotates to stir and mix the compatibilizer and the molten plastic in the cavities of the second disk and the first disk.

[0023] The invention fixes a round rod at the tail end of the screw, so that the plastic transferred to the round rod is in the best molten state. A adding part for placing a compatibilizer is arranged just above the round rod, and a adding pipe is fixedly connected below the adding part. The adding pipe is located on one side of the round rod near the mixing part, so as to ensure that the compatibilizer and the molten plastic enter the mixing area together.

[0024] The present invention has a cleaning strip fixedly arranged on the outer side of the second disc, and the cleaning strip is in contact with the inner wall of the frame. When the second disc moves, the cleaning strip moves synchronously with the second disc. When molten plastic enters the cavity, the cleaning strip seals the inner wall of the frame to prevent the molten plastic from flowing into other parts. During the unloading process, the cleaning strip cleans the inner wall of the frame, thereby cleaning the inside of the equipment and avoiding a large amount of residual plastic. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the main structure of an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the internal structure of a rack according to an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a three-dimensional change of a stirring portion according to an embodiment of the present invention;

[0029] Figure 4 It is a schematic diagram of three cross-sectional structures of a disk in the initial state of an embodiment of the present invention;

[0030] Figure 5 It is a schematic diagram of the second cross-sectional structure of the disk in the initial state of an embodiment of the present invention;

[0031] Figure 6 For the embodiment of the present invention Figure 5 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0032] The numbers in the figure represent respectively: 1. frame; 2. stirring part; 21. screw; 22. round rod; 3. feeding part; 4. adding part; 41. dosing pipe; 5. mixing part; 51. disc one; 511. one-way valve one; 52. disc two; 521. clamping ring; 522. round groove; 523. cleaning strip; 524. one-way valve two; 525. wedge; 526. connecting piece; 527. positioning ring; 528. isolation piece; 53. guide shaft; 54. disc three; 541. cylinder; 542. clamping groove; 543. fixing rod; 545. limiting groove; 55. compression spring; 6. unloading part. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present invention will be further described below in conjunction with the embodiments. Example

[0035] See also Figure 1-Figure 6 The present invention provides a technical solution for a system for regenerating high-performance PVC plastic particles using waste plastics: Figure 1 and Figure 2 As shown, a feeding portion 3 for transmitting pretreated waste plastics is provided on one side of the top of the frame 1. The pretreated plastic enters the frame 1 from the feeding portion 3 and is heated until it is in a molten state. A stirring portion 2 is provided inside the frame 1. The stirring portion 2 includes a screw 21 for stirring and transmitting the molten plastic. A round rod 22 is fixedly provided at the tail end of the screw 21, so that the plastic transmitted to the round rod 22 is in an optimal molten state. An adding portion 4 for placing a compatibilizer is provided directly above the round rod 22, and an additive pipe 41 is fixedly connected below the adding portion 4. The additive pipe 41 is located on one side above the round rod 22 close to the mixing portion 5, so as to ensure that the compatibilizer and the molten plastic enter the mixing portion 5 area together.

[0036] like Figure 2 and Figure 3 As shown, the mixing part 5 includes a disc 51 with a round rod 22 passing through the middle, one end of the round rod 22 passes through the disc 51 and is fixedly connected to the guide shaft 53, a channel 1 is opened on the inner wall of the disc 51, and a one-way valve 511 is rotatably connected to the outer end of the channel 1. The inside of the frame 1 is divided into two areas by the disc 51, as shown in FIG. Figure 2 The right side of the disk 1 51 shown is area 1, and the left side of the disk 1 51 is area 2. The initial state is Figure 3 As shown in the figure above, the pressures on both sides of the disk 1 51 are equal, and the one-way valve 1 511 is in a closed state. When the heated molten plastic in the rack 1 is pushed toward the disk 1 51, the pressure of the area 1 on the right side of the disk 1 51 is greater than the pressure of the area 2 on the left side of the disk 1 51. At this time, the one-way valve 1 511 rotates toward the disk 2 52, opening the channel 1, and the molten plastic and the compatibility agent gradually flow into the area 2 until the capacity value of the area 2 reaches the standard, that is, Figure 3 In the state shown in the lower middle figure, the pressure on both sides of the disc 1 51 is balanced, and the one-way valve 1 511 returns to the initial position to close the channel 1.

[0037] like Figure 3 , Figure 4 , Figure 6 and Figure 5As shown, the outer side of the guide shaft 53 is sleeved with a second disk 52, and a slide groove is opened in the middle of the second disk 52. In the initial state, the second disk 52 can slide on the outer side of the guide shaft 53. The middle part of the end of the second disk 52 close to the first disk 51 is elastically connected with an isolator 528. The isolator 528 is slidably sealed with the outer side of the guide shaft 53. The isolator 528 can be sealed with a molded packing, a stuffing box, and an expansion ring. The principle is similar to the piston sealing structure, and the slide groove is always kept in a sealed state. The inner wall of the slide groove is slidably connected with two positioning rings 527 symmetrically arranged with the guide shaft 53 as the center. In the initial state, the two positioning rings 527 are not closed, and the second disk 52 can slide on the outer side of the guide shaft 53. When the two positioning rings 527 are closed, they can form a complete ring. A positioning block is fixedly connected to the inner wall of the positioning ring 527, and the positioning block is engaged with a positioning groove opened at the position of the guide shaft 53 near the disk three 54, and the width of the positioning groove is smaller than the size of the positioning ring 527. When the disk two 52 drives the positioning ring 527 to move to the other end of the guide shaft 53 near the disk three 54, the positioning block is first engaged with the positioning groove, and an irregular thread is provided inside the positioning ring 527, which increases the friction between the disk two 52 and the guide shaft 53. When the positioning ring 527 is fully closed, the disk two 52 can engage and limit the outer side of the guide shaft 53.

[0038] The outer surface of the circular shaft of the positioning ring 527 is elastically connected with a connecting piece 526, and the connecting piece 526 includes a telescopic rod, one end of the telescopic rod is fixedly connected to the positioning ring 527, and the other end of the telescopic rod is connected to a wedge 525. A vibration spring is sleeved on the outside of the telescopic rod, and the other end of the vibration spring is elastically connected to the wedge 525. In the initial state, the wedge 525 is located inside the circular groove 522, and a groove for the movement of the wedge 525 and the connecting piece 526 is opened between the circular groove 522 and the sliding groove. The center extension line of the circular groove 522 coincides with the fixed rod 543, and the fixed rod 543 is fixed to the side of the disk three 54 close to the disk two 52. In the initial state, the side of the fixed rod 543 close to the disk two 52 fits with the circular groove 522. When the disk 2 52 moves toward the disk 3 54, the fixed rod 543 can be inserted into the circular groove 522 while the disk 2 52 moves, which can play a guiding and limiting role in the sliding of the disk 2 52, thereby preventing the disk 2 52 from rotating while moving, thereby ensuring the stability of the movement of the disk 2 52. The side of the circular groove 522 away from the disk 3 54 is rotatably connected with the check valve 2 524. In the initial state, the check valve 2 524 closes the circular groove 522. The disk 2 52 is sealed under the joint action of the check valve 2 524 and the isolation piece 528 to prevent the infiltration of molten plastic and ensure the constant pressure in the cavity. When the fixed rod 543 is inserted into and penetrates the circular groove 522, the check valve 2 524 flips open.

[0039] like Figure 4 and Figure 5As shown, the side of the fixing rod 543 close to the disk three 54 is fixedly connected to the limiting groove 545, and the end of the limiting groove 545 close to the disk two 52 is set to an open state. When the fixing rod 543 passes through the circular groove 522 and slides therein, the wedge block 525 set on the inner side of the circular groove 522 slides from the open end of the limiting groove 545 to the inner side of the limiting groove 545. The end of the limiting groove 545 close to the disk three 54 is set to an inclined surface. When the disk two 52 moves to a position close to the disk three 54, the inclined surface of the limiting groove 545 fits with the surface of the wedge block 525 inside the circular groove 522. As the distance between the two changes, the limiting groove 545 gradually squeezes the wedge block 525, so that the wedge block 525 25 moves, the wedge block 525 drives the positioning ring 527 to move downward through the connecting piece 526, so that the two positioning rings 527 are gradually closed to form a closed ring. At this time, the positioning block arranged inside the closed ring is engaged with the positioning groove of the guide shaft 53. When the guide shaft 53 rotates and the positioning block and the positioning groove do not coincide, the positioning block contacts the smooth surface of the guide shaft 53, and the positioning block fixedly connected to the positioning ring 527 can perform slight radial movement under the action of the connecting piece 526 until the positioning block of the positioning ring 527 is engaged with the positioning groove of the guide shaft 53, thereby realizing the engagement and fixation of the disk 2 52 and the guide shaft 53, so that the rotation of the guide shaft 53 in the subsequent process can drive the disk 2 52 to rotate synchronously.

[0040] A slot 542 is provided in the middle of the disk three 54 near the disk two 52, and the inner wall of the slot 542 can fit with the outer wall of the snap ring 521. A magnetic block is arranged inside the slot 542. When the inclined surface of the limit slot 545 fits with the wedge block 525, the magnetic material arranged on the side of the snap ring 521 enters the magnetic induction field of the magnetic block in the slot 542. The attraction between the slot 542 and the snap ring 521 makes it so that when the disk two 52 is close to the disk three 54, it is no longer driven by the pressure of the molten plastic. The disk two 52 and the disk three 54 can be quickly attracted. At this time, the pressures at both ends of the disk one 51 are equal, the one-way valve one 511 is closed, and the molten plastic no longer enters the cavity formed by the disk one 51 and the disk two 52.

[0041] After the second disk 52 and the third disk 54 are fitted together, the extrusion of the limiting groove 545 on the wedge block 525 reaches the maximum value, and the positioning ring 527 is completely closed under the force of the downward movement of the wedge block 525 and the connecting piece 526 to form a complete circular ring, thereby engaging and limiting the outer side of the guide shaft 53. At this time, the second disk 52, the guide shaft 53 and the third disk 54 are fixed to each other and regarded as a whole. The rotation of the guide shaft 53 drives the second disk 52 and the third disk 54 to rotate, and the rotation of the third disk 54 drives the fixing rod 543 to rotate. The rotation of the fixing rod 543 stirs and mixes the compatibility agent and the molten plastic in the cavities of the second disk 52 and the first disk 51. After the quantitative mixture stored in the cavities of the second disk 52 and the first disk 51 is stirred, the material unloading operation can be carried out.

[0042] like Figure 2 As shown, a material discharge piece 6 is provided at the bottom of the inner wall of the frame 1, and the side of the material discharge piece 6 is close to the side of the disc 1 51 close to the disc 2 52, and the width of the material discharge piece 6 is smaller than the size of the disc 2 52. When the disc 2 52 and the disc 1 51 are in contact, the maximum cleaning effect is achieved. Figure 3 and Figure 4 As shown, two compression springs 55 are symmetrically arranged on one side of the disk 2 52 close to the disk 3 54 with the retaining ring 521 as the center. One end of the compression spring 55 is elastically connected to the disk 2 52, and the other end of the compression spring 55 passes through the disk 3 54 and fits against the inner wall of the cylinder 541 fixedly connected to the outer side of the disk 3 54. In the process of the disk 2 52 moving toward the disk 3 54, the compression spring 55 not only maintains the balanced movement of the disk 2 52, but also performs elastic deformation compression. When the disk 3 54 and the disk 2 52 are closed, the elastic force of the compression spring 55 is equal to the combined force of the magnetic force of the retaining groove 542 and the retaining ring 521 and the pressure of the molten plastic, so that they remain balanced.

[0043] When the blanking piece 6 is opened for blanking, the molten plastic in the cavity gradually flows out of the blanking piece 6, the pressure decreases, and the elastic force of the compression spring 55 is greater than the combined force of the elastic force of the compression spring 55, the magnetic force of the clamping groove 542 and the clamping ring 521, and the pressure of the molten plastic. The compression spring 55 recovers its elastic deformation, and the compression spring 55 causes the disk 2 52 to move toward the disk 1 51. The molten plastic is quickly discharged under the action of gravity and thrust, thereby increasing the discharge speed. Due to the rapid reverse movement of the disk 2 52, the side of the one-way valve 1 511 is always subjected to the thrust and pressure of the molten plastic, and the one-way valve 1 511 remains in a closed state.

[0044] Since plastic materials tend to harden when cooled, especially those with high viscosity and low fluidity, the plastic may solidify rapidly in the rack 1. When the compatibility agent is mixed with the molten plastic next time, it is not only easy to form a blockage, but also cause errors in the mixing capacity. Although special cleaning tools such as scrapers, brushes or cleaning rods can be used in the prior art to manually clean the residual materials, the internal cleanliness of the equipment is low and more plastic may remain.

[0045] Therefore, the present invention is fixedly provided with a cleaning strip 523 on the outer side of the disc 2 52, and the cleaning strip 523 is in contact with the inner wall of the frame 1. When the disc 2 52 moves, the cleaning strip 523 moves synchronously with the disc 2 52. When the molten plastic enters the cavity, the cleaning strip 523 seals the inner wall of the frame 1 to prevent the molten plastic from flowing into other parts. During the unloading process, the cleaning strip 523 cleans the inner wall of the frame 1, thereby cleaning the inside of the equipment to avoid a lot of residual plastic.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A system for regenerating high-performance PVC plastic particles from waste plastics, characterized in that: include: A frame (1), wherein a feeding portion (3) for inputting plastic is provided on the upper surface of the frame (1), and an adding portion (4) for conveying a compatibilizing agent is provided on the upper surface of the frame (1), wherein the feeding portion (3) and the adding portion (4) are arranged in sequence from right to left; A stirring portion (2), the stirring portion (2) comprising a screw (21) for conveying molten plastic, the other end of the screw (21) being fixedly connected to a round rod (22), the end of the round rod (22) away from the screw (21) being provided with a mixing portion (5), a dosing tube (41) for inputting a compatible agent being suspended above the round rod (22) and close to the outer surface of the mixing portion (5), the top end of the dosing tube (41) being fixedly connected to the bottom end of the adding portion (4); The mixing section (5) comprises a disc 1 (51) embedded in the frame (1); a guide shaft (53) is rotatably connected to the middle of the disc 1 (51); a disc 2 (52) is sleeved on the outer side of the guide shaft (53); in an initial state, the disc 1 (51) and the disc 2 (52) fit each other; two compression springs (55) are symmetrically arranged on a side of the disc 2 (52) away from the disc 1 (51) with the guide shaft (53) as the center; circular grooves (522) are symmetrically opened on the same side of the disc 2 (52); the compression springs (55) are away from the guide shaft (53) and the compression springs (55) are symmetrically arranged on the same side of the disc 2 (52); One end of the second disk (52) is elastically connected to the third disk (54), and two fixing rods (543) are symmetrically fixed on one side of the third disk (54) close to the second disk (52), and the fixing rods (543) coincide with the center line of the circular groove (522). After the second disk (52) moves from a state of being in contact with the first disk (51) to a state of being in contact with the third disk (54), the cavity formed by the first disk (51) and the second disk (52) can store a certain amount of compatibilizer and molten plastic, and the interior of the cavity can be stirred by the fixing rods (543); The second disk (52) is fixedly connected to a side of the second disk (52) close to the third disk (54) with a snap ring (521), and a magnetic material is arranged on the side of the snap ring (521); and the second disk (52) is elastically connected to a side of the second disk (52) away from the third disk (54) with an isolating member (528) that is slidably sealed with the outer surface of the circular shaft of the guide shaft (53); A sliding groove coinciding with the center line of the clamping ring (521) is provided at the center position of the inner part of the second disk (52); a positioning ring (527) is slidably connected to the inner wall of the sliding groove; a connecting piece (526) is elastically connected to the outer surface of the circumference of the positioning ring (527); a wedge block (525) is elastically connected to the other end of the connecting piece (526); in the initial state, the wedge block (525) is located in the middle of the circular groove (522); and a one-way valve (524) is rotatably connected to the side of the circular groove (522 away from the third disk (54); A positioning groove is provided on the outer circumferential surface of the guide shaft (53) near the disc three (54), and a positioning block is fixedly connected to the bottom end of the positioning ring (527) and is engaged with the positioning groove; A limiting groove (545) is provided on one side of the fixing rod (543) close to the guide shaft (53); an end of the limiting groove (545) close to the second disk (52) is in an open state; an end of the limiting groove (545) close to the third disk (54) is arranged as an inclined surface; and the inclined surface of the limiting groove (545) is in contact with the inclined surface of the wedge block (525); The third disk (54) is provided with a clamping groove (542) magnetically connected to the clamping ring (521) at a middle portion close to the second disk (52); Wherein, the outer circumferential surface of the second disc (52) is provided with a cleaning strip (523) capable of cleaning the inner wall of the frame (1) after unloading.

2. The system for regenerating high-performance PVC plastic particles from waste plastics according to claim 1, characterized in that: The inside of the disc one (51) is rotatably connected to the one-way valve one (511), and when the pressures on both sides of the disc one (51) are equal, the one-way valve one (511) is closed.

3. The system for regenerating high-performance PVC plastic particles from waste plastics according to claim 1, characterized in that: Two cylinders (541) are symmetrically fixed to one side of the disk three (54) away from the disk two (52), and the inner wall of the cylinder (541) is in contact with one end of the compression spring (55) away from the disk two (52).

4. The system for regenerating high-performance PVC plastic particles from waste plastics according to claim 1, characterized in that: A material removal piece (6) is provided at the bottom end of the inner wall of the frame (1), and a side edge of the material removal piece (6) is close to the side edge of the first disc (51) and close to the second disc (52).

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