Efficient and low-consumption pet chip fine preparation device and preparation process

Abstract

This invention relates to the technical field of PET chip preparation, and discloses a high-efficiency, low-consumption PET chip fine preparation device and process, including a frame, an extrusion cylinder, and a cooling box. One end of the extrusion cylinder is connected to an extrusion motor, and the other end is equipped with an outlet mold. A feeding hopper is provided above the end of the extrusion cylinder, and an electric heating box is also fitted outside the extrusion cylinder. The cooling box is located at the outlet end of the outlet mold. The outlet end face of the outlet mold has several outlet holes evenly distributed around its circumference. This solution achieves short-stroke precise cutting through an axially staggered cutting structure combined with high-frequency micro-amplitude oscillation drive, ensuring the uniformity and accuracy of the PET chips. The axially staggered arrangement design effectively avoids adhesion problems during the cutting process and improves cutting efficiency. At the same time, the high-frequency micro-amplitude oscillation drive mode keeps the blade in a stable and efficient operating state during the cutting process, further improving the quality of PET chip preparation.

Description

Technical Field

[0001] This invention relates to the technical field of PET chip preparation, and in particular to a high-efficiency, low-consumption PET chip fine preparation device and preparation process. Background Technology

[0002] Polyethylene terephthalate (PET) chips are a core raw material for chemical fibers, packaging, and engineering plastics. Their preparation involves a process of melt extrusion, cooling and shaping, and precision cutting. The quality of the cutting process directly determines the geometric accuracy, surface properties, and subsequent processing performance of the chips, making it a key step affecting product grade.

[0003] Currently, the mainstream industrial solution is a single-blade rotary cutting solution with a long stroke. The rotating blade generates centrifugal force imbalance under high-speed motion, which causes radial runout of the blade head and results in fluctuations in slice length. A single blade completes all the cutting in one rotation. Any tiny runout of the blade, wear, or tiny error of the drive system will accumulate and affect the accuracy of all slices. During rotary cutting, the linear velocity of the blade varies at different radii along the circular path. The linear velocity is slower near the center and faster near the outer edge. This inevitably results in PET slices that are longer on the inside and shorter on the outside, leading to poor length consistency, low precision, and low efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency, low-consumption PET slice fine preparation device and preparation process, which aims to solve the problems in the prior art.

[0005] The present invention is implemented as follows: a high-efficiency and low-consumption PET chip fine preparation device includes a frame, an extrusion cylinder and a cooling box. One end of the extrusion cylinder is connected to an extrusion motor, and the other end is equipped with a discharge mold. A feeding hopper is provided above the end of the extrusion cylinder. An electric heating box is also fitted outside the extrusion cylinder. The cooling box is located at the discharge end of the discharge mold. The discharge end face of the discharge mold has a plurality of discharge holes evenly distributed circumferentially, and the discharge end passes through the assembly plate at the end of the frame and extends downward. Below the assembly plate, a slicing assembly and a driving assembly are coaxially sleeved on the discharge end of the discharge mold, wherein: The slicing component includes: The bottom ring is fixed to the assembly plate; The bearing is coaxially connected to the support ring of the discharge mold; The bearing is fitted onto the outer side of the bottom ring via a swing ring; Several blades are radially inserted between the swing ring and the support ring. Both sides of the blades are provided with cutting edges, and the cutting edges of each blade are axially offset from the discharge hole. The drive assembly is connected to a swing ring, which drives the blade to perform high-frequency micro-amplitude reciprocating oscillations around the axis of the discharge mold.

[0006] Preferably, the ring body of the swing ring and the support ring are respectively provided with a plurality of radially extending first slots and second slots evenly distributed in the circumferential direction; The blade surface is provided with reinforcing ribs, and its two ends are respectively provided with insert plates corresponding to the first slot and plugs corresponding to the second slot.

[0007] Preferably, the bottom ring is circumferentially distributed with several radial locking plates, the number of which is the same as that of the blade; Each lock plate contains: Return spring: Both ends abut against the inner wall of the lock plate and the end face of the lock rod, respectively; Locking rod: Extends outward under the force of the return spring, with the extended end penetrating the end of the lock plate; Toggle block: vertically fixed to the inner end of the lock bar and extends to the outer side of the lock plate.

[0008] Preferably, the surface of the insert plate is provided with a guide groove, and the end of the locking rod passes through and extends into the guide groove of the insert plate.

[0009] Preferably, an unlocking rod is coaxially inserted into the support ring, and a number of locking plates are evenly distributed around one end of the unlocking rod located inside the support ring, the number being the same as the number of blades; The plug surface is provided with an annular groove; The locking piece has a radially protruding locking block at its end, which normally engages with an annular groove to form a circumferential constraint.

[0010] Preferably, the unlocking rod is provided with a top rod at one end inside the support ring, and a force-applying spring is coaxially sleeved on the outside of the top rod. The two ends of the force-applying spring abut against the inner end face of the unlocking rod and the root of the locking piece, respectively, driving the locking block to press into the locking groove.

[0011] Preferably, the outer end of the unlocking rod is provided with an air injection port, and the inner end is provided with several radial air inlets connected to the air injection port; The support ring is circumferentially distributed with several inclined air outlet holes, the axis of which forms an angle of 20°-30° with the blade surface, and the air outlet direction is towards the cutting edge.

[0012] Preferably, the driving component includes: The arc-shaped shell has its center coinciding with the rotation axis of the pendulum ring; Two electromagnetic components are symmetrically arranged at both ends of the arc-shaped shell, and the telescopic end of each electromagnetic component is fixedly connected to a push rod; The slider is slidably installed in the arc-shaped slide rail of the arc-shaped housing, and its two ends are respectively fixed to the two push rods; The anti-fool spring is coaxially sleeved on the outside of the push rod, with its two ends abutting against the electromagnetic housing and the slider, respectively. The connecting rod is hinged at one end to the slider and at the other end to the swing ring; The two electromagnetic components extend and retract alternately, driving the slider to slide back and forth along the arc-shaped slide rail via the push rod, and then converting the high-frequency micro-amplitude oscillation of the pendulum ring through the connecting rod.

[0013] A high-efficiency, low-consumption PET chip refining process, applied to the aforementioned high-efficiency, low-consumption PET chip refining apparatus, includes the following steps: S1. Raw material pretreatment and extrusion molding: After drying the PET raw material, add it to the extrusion cylinder, start the extrusion motor to heat and plasticize it; Molten PET is extruded vertically downwards through the circumferentially distributed discharge holes of the discharge die, forming multiple thin strips. S2, Strip Cooling and Shaping: The extruded high-temperature strip enters the cooling box for forced air cooling or water mist cooling, so that the surface of the strip is solidified and shaped; S3, Dynamic Cutting of Blades: The electromagnetic components of the drive assembly are activated, and the swing ring is driven to reciprocate at high frequency through the slider and connecting rod. This causes the blade to swing at high frequency around the axis of the discharge end of the discharge mold. The blades on both sides are used to cut the material strip alternately. The blade edges are always kept axially misaligned with the discharge hole. During the swing, the blade edges cut the material strip laterally. S4. Anti-sticking and online cleaning: Compressed air / nitrogen is introduced through the air injection port of the unlocking rod. The gas is sprayed out from the inclined air outlet of the support ring through the air inlet, blowing the blade edge at a 20°-30° angle to cool the blade edge and prevent PET melt from sticking. S5. Slice Collection and Blade Maintenance: After cutting, the PET slices are separated by a vibrating sieve to remove debris and collect uniform slices. Quick tool change procedure: a. Press the lever to retract the locking bar and release the blade insert plate from the lock; b. Lift the unlocking lever, and the force spring will be compressed by the push rod to disengage the locking plate from the annular groove of the plug; c. The old blade is pulled out radially, and the new blade is inserted and automatically locked.

[0014] The beneficial effects of the high-efficiency, low-consumption PET chip fine preparation device and preparation process disclosed in this invention are: 1. This solution achieves precise short-stroke cutting by combining an axially staggered cutting structure with a high-frequency micro-amplitude oscillation drive, ensuring the uniformity and accuracy of PET slices. The axially staggered arrangement effectively avoids adhesion problems during the cutting process and improves cutting efficiency. At the same time, the high-frequency micro-amplitude oscillation drive keeps the blade in a stable and efficient operating state during the cutting process, further improving the preparation quality of PET slices. 2. This solution also integrates an air-blowing anti-sticking system and a one-click blade changing mechanism, which effectively solves the problem of thermal adhesion that may occur during the cutting of PET slices, ensuring a smooth cutting process. The integration of the one-click blade changing mechanism greatly simplifies the blade replacement process, improves the ease of use and production efficiency of the equipment. Through the synergistic effect of the air-blowing anti-sticking system and the one-click blade changing mechanism, the fine preparation of PET slices is achieved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a high-efficiency, low-consumption PET slice refining device provided in an embodiment of the present invention; Figure 2 This is a partial bottom view schematic diagram of a high-efficiency and low-consumption PET slice refining device provided in an embodiment of the present invention; Figure 3 This invention provides a high-efficiency, low-consumption PET slice refining device. Figure 2 A magnified schematic diagram of the structure at point A in the diagram; Figure 4 This is a schematic diagram of the drive assembly and slicing assembly of a high-efficiency, low-consumption PET slice refining device provided in an embodiment of the present invention; Figure 5 This is a partial structural diagram of the discharge end of the discharge mold and the slice assembly of a high-efficiency, low-consumption PET slice refining device provided in an embodiment of the present invention; Figure 6 This is a top view of the slicing assembly of a high-efficiency, low-consumption PET slicing fine preparation device provided in an embodiment of the present invention.

[0016] Marker explanation: 1. Frame; 2. Discharge mold; 3. Cooling box; 4. Slicing assembly; 5. Drive assembly; 11. Extrusion motor; 12. Extrusion cylinder; 13. Feed hopper; 14. Electric heating box; 15. Assembly plate; 31. Discharge hole; 41. Bottom ring; 42. Swing ring; 43. Support ring; 44. Unlocking lever; 45. Blade; 411. Locking plate; 412. Return spring; 413. Locking rod; 414. Toggle block; 421. First slot; 431. Second slot; 432. Vent hole; 441. Air inlet; 442. Air vent; 443. Push rod; 444. Locking plate; 445. Force spring; 451. Reinforcing rib; 452. Insert plate; 453. Guide groove; 454. Plug; 51. Electromagnetic component; 52. Push rod; 53. Foolproof spring; 54. Slider; 55. Connecting rod. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0019] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0020] In this embodiment: Reference Figures 1-2 The diagram shows a preferred embodiment of the present invention.

[0021] This embodiment of a high-efficiency, low-consumption PET chip refining device includes a frame 1, an extrusion cylinder 12, and a cooling box 3. One end of the extrusion cylinder 12 is connected to an extrusion motor 11, and the other end is fitted with a discharge mold 2. A feeding hopper 13 is located above the end of the extrusion cylinder 12, and an electric heating box 14 is fitted around the outside of the extrusion cylinder 12. The cooling box 3 is located at the discharge end of the discharge mold 2. Polyethylene terephthalate (PET) raw material is injected into the extrusion cylinder 12 through the feeding hopper 13. Driven by the extrusion motor 11, the raw material is conveyed to the discharge mold 2 at the end. During the conveying process, the electric heating box 14 continuously heats and melts the raw material, causing the molten PET to form several circumferentially distributed strips through the discharge mold 2. The formed high-temperature strips enter the cooling box 3 for cooling and solidification, and the solidified strips are continuously extruded vertically downwards. Reference Figure 5 As shown, the discharge end face of the discharge mold 2 has a plurality of discharge holes 31 evenly distributed circumferentially, and the discharge end passes through the assembly plate 15 at the end of the frame 1 and extends downward. Below the assembly plate 15, there is a slicing assembly 4 and a driving assembly 5 coaxially sleeved on the discharge end of the discharge mold 2, wherein: The slicing assembly 4 includes: a bottom ring 41 fixed to the assembly plate 15; a support ring 43 coaxially connected to the discharge mold 2 with a bearing; a swing ring 42 sleeved on the outside of the bottom ring 41 with a bearing; and a plurality of blades 45 radially inserted between the swing ring 42 and the support ring 43, with cutting edges on both sides of the blades 45, and the cutting edges of each blade 45 being axially offset from the discharge hole 31. The drive assembly 5 is connected to the swing ring 42, driving the blade 45 to reciprocate at high frequency and small amplitude around the axis of the discharge mold 2. When the solidified long strip is extruded from the discharge hole 31, the cutting edge of the blade 45 precisely cuts the raw material to form high-quality PET chips. Because the cutting edge of the blade 45 is axially offset from the discharge hole 31, the blade 45 is located between the discharge holes 31, resulting in a short cutting stroke. This ensures that the cut chips are of consistent size and regular shape, improving the overall quality of the chips. In addition, this design also significantly improves cutting efficiency and reduces energy consumption, meeting the goal of high-efficiency and low-consumption preparation.

[0022] It is worth noting that the swing ring 42 and the support ring 43 are each circumferentially distributed with a plurality of radially extending first slots 421 and second slots 431; the surface of the blade 45 is provided with reinforcing ribs 451, and its two ends are respectively provided with insert plates 452 corresponding to the first slots 421 and plugs 454 corresponding to the second slots 431. The reinforcing ribs 451 are used to improve the overall strength and rigidity of the blade 45, ensuring that the blade 45 is not easily deformed or damaged during high-frequency micro-amplitude reciprocating oscillation, and maintaining stable cutting performance. The cooperation of the insert plates 452 with the first slots 421 and the plugs 454 with the second slots 431 not only realizes the stable installation of the blade 45 between the swing ring 42 and the support ring 43, but also facilitates the quick disassembly and replacement of the blade 45, improving maintenance efficiency.

[0023] Reference Figures 3-4 As shown, the bottom ring 41 is circumferentially distributed with several radial locking plates 411, the number of which is the same as the blade 45; each locking plate 411 is provided with: a return spring 412, the two ends of which abut against the inner wall of the locking plate 411 and the end face of the locking rod 413 respectively; the locking rod 413, which extends outward under the elastic force of the return spring 412, and the extended end passes through the end of the locking plate 411; a toggle block 414, which is vertically fixed to the inner end of the locking rod 413 and extends to the outer side of the locking plate 411; the surface of the insert plate 452 is provided with a guide groove 453, and the end of the locking rod 413 passes through and extends into the guide groove 453 of the insert plate 452.

[0024] This allows the blade 45 to achieve stable radial positioning and guidance during operation through the engagement of the end of the locking rod 413 with the guide groove 453 on the insert plate 452. This ensures that the blade 45 will not fall off during operation while allowing it to move freely during reciprocating oscillations (the locking rod 413 slides within the guide groove 453 without affecting the oscillation), thereby further improving cutting accuracy and stability. The elastic force of the return spring 412 allows the locking rod 413 to automatically reset, ensuring that it can quickly and accurately return to its working position after the blade 45 is disassembled or replaced. The toggle block 414 provides users with a convenient operating method; a simple toggle allows the locking rod 413 to extend or retract, facilitating the installation or removal of the blade 45 and improving blade changing efficiency.

[0025] Furthermore, in Figure 6 In this design, an unlocking rod 44 is coaxially inserted into the support ring 43. Several locking plates 444, the same number as the blades 45, are evenly distributed circumferentially at one end of the unlocking rod 44 within the support ring 43. The plug 454 has an annular groove on its surface. Each locking plate 444 has a radially protruding locking block at its end, which normally engages with the annular groove to form a circumferential constraint. A push rod 443 is also provided at one end of the unlocking rod 44 inside the support ring 43, and a force-applying spring 445 is coaxially sleeved on the outside of the push rod 443. The two ends of the force-applying spring 445 abut against the inner end face of the unlocking rod 44 and the root of the locking plate 444, respectively, driving the locking block to press into the groove.

[0026] When the blade 45 needs to be replaced, the user simply pushes the unlocking lever 44 into the support ring 43. The unlocking lever 44 moves the locking plate 444 and compresses the force spring 445, causing the locking block to disengage from the annular groove. The blade 45 can then be easily removed. The force spring 445 ensures that, by default, the locking block maintains a certain pressure on the annular groove, improving the stability and reliability of the locking mechanism. This design makes the replacement of the blade 45 simpler and faster, reducing operation time and improving work efficiency.

[0027] The outer end of the unlocking rod 44 is provided with an air inlet 441, and the inner end is provided with several radial air inlets 442 that connect to the air inlet 441; the support ring 43 is evenly distributed with several inclined air outlets 432 around its circumference, and its axis forms an angle of 20°-30° with the surface of the blade 45, with the air outlet direction pointing towards the cutting edge.

[0028] During the cutting process, high-pressure air / nitrogen is injected into the unlocking rod 44 through the air injection port 441. The gas enters the support ring 43 through the radial air inlet 442. Subsequently, the high-pressure gas is ejected at a certain angle through the inclined air outlet 432 on the support ring 43, directly acting on the cutting edge of the blade 45. This not only effectively disperses the PET debris generated during the cutting process (especially the incompletely cured parts), preventing it from accumulating on the blade 45 and affecting cutting efficiency and accuracy, but also reduces the working temperature of the blade 45 through the cooling effect of the gas, avoiding thermal adhesion of the PET melt and extending the blade's service life. It achieves both cleaning and cooling effects without causing unnecessary interference to the cutting process.

[0029] The driving assembly 5 includes: an arc-shaped housing whose center coincides with the rotation axis of the pendulum ring 42; two electromagnetic components 51 symmetrically arranged at both ends of the arc-shaped housing, with the telescopic end of each electromagnetic component 51 fixedly connected to a push rod 52; a slider 54 slidably installed within the arc-shaped slide rail of the arc-shaped housing, with both ends fixedly connected to the two push rods 52 respectively; a foolproof spring 53 coaxially sleeved outside the push rod 52, with both ends abutting against the housing of the electromagnetic component 51 and the slider 54 respectively; and a connecting rod 55, one end hinged to the slider 54 and the other end hinged to the pendulum ring 42. The two electromagnetic components 51 telescopically extend and retract, driving the slider 54 to reciprocate along the arc-shaped slide rail via the push rod 52, and converting this motion into high-frequency micro-amplitude oscillation of the pendulum ring 42 via the connecting rod 55.

[0030] When the electromagnetic component 51 extends or retracts, the anti-fooling spring 53 acts as a buffer and assists in resetting, ensuring that the slider 54 moves smoothly back and forth within the arc-shaped slide, while reducing mechanical impact and noise. The connecting rod 55 converts the arc-shaped reciprocating motion of the slider 54 into the oscillation of the swing ring 42. This high-frequency micro-amplitude oscillation can uniformly drive the blade 45 to cut, improving the stability and uniformity of the cutting.

[0031] In another embodiment of the present invention, the drive component 5 may adopt a crank-slider structure driven by a motor to convert the rotational motion of the motor shaft into circular motion, and drive the pendulum ring 42 to reciprocate through the rod body.

[0032] This embodiment also includes a high-efficiency, low-consumption PET chip refining process applied to the aforementioned high-efficiency, low-consumption PET chip refining device, comprising the following steps: raw material pretreatment and extrusion molding: after drying, the PET raw material is added to the extrusion cylinder 12, and the extrusion motor 11 is started to heat and plasticize it; the molten PET is extruded vertically downward through the circumferentially distributed discharge holes 31 of the discharge die 2 to form multiple thin strips; strip cooling and shaping: the extruded high-temperature strips enter the cooling box 3 for forced air cooling or water mist cooling to solidify and shape the strip surface; dynamic cutting by the blade: the electromagnetic component 51 of the drive assembly 5 is activated, and the pendulum is driven through the slider 54 and the connecting rod 55. Ring 42 reciprocates at high frequency with a small amplitude, driving blade 45 to swing at high frequency around the discharge end axis of discharge mold 2. The blades on both sides alternately cut the material strip. The blade edge of blade 45 is always axially misaligned with discharge hole 31. During the swing, the blade edge cuts the material strip laterally. Anti-sticking and online cleaning: Compressed air / nitrogen is introduced through the air injection port 441 of unlocking rod 44. The gas is sprayed out from the inclined air outlet 432 of support ring 43 through air inlet 442, blowing the blade edge of blade 45 at a 20°-30° angle to cool the blade edge and prevent PET melt from sticking. Slice collection and blade maintenance: The cut PET slices are removed by a vibrating screening device to remove debris and collect uniform slices. The quick blade change process in this embodiment is as follows: Press the lever 414 to retract the locking lever 413, releasing the blade 45 from the fixing of the insert plate 452; lift the unlocking lever 44, and the force spring 445 is compressed by the push rod 443 to disengage the locking plate 444 from the annular groove of the plug 454; pull out the old blade 45 radially, insert the new blade 45, and automatically lock it (locking lever 413 and locking plate 444).

[0033] This solution provides a high-efficiency, low-consumption device and process for the refined preparation of PET chips. By employing an axially staggered cutting structure (the blade 45's cutting edge and the discharge hole 31 are staggered) combined with a high-frequency micro-amplitude oscillation drive (the electromagnetic component 51 drives the swing ring 42 to oscillate), short-stroke precision cutting is achieved, ensuring the uniformity and accuracy of the PET chips. The axially staggered arrangement effectively avoids adhesion problems during the cutting process, improving cutting efficiency; simultaneously, the high-frequency micro-amplitude oscillation drive keeps the blade 45 in a stable and efficient operating state during cutting, further improving the quality of the prepared PET chips.

[0034] Furthermore, this solution also integrates an air-blowing anti-sticking system (with the inclined air outlet 432 blowing the cutting edge at a 20°-30° angle) and a one-button blade changing mechanism (pressing the lever 414 to unlock the bottom ring 41 and lifting the unlocking rod 44 to disengage the outer ring 43). This design effectively solves the problem of thermal adhesion that may occur during the cutting of PET slices, ensuring a smooth cutting process. The integration of the one-button blade changing mechanism greatly simplifies the operation process of changing the blade 45, improving the ease of use and production efficiency of the equipment. Through the synergistic effect of the air-blowing anti-sticking system and the one-button blade changing mechanism, the refined preparation of PET slices is achieved.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency, low-consumption PET chip refining device, comprising a frame, an extrusion cylinder, and a cooling box, wherein one end of the extrusion cylinder is connected to an extrusion motor, and the other end is fitted with a discharge die; a feeding hopper is provided above the end of the extrusion cylinder; an electric heating box is also fitted around the outside of the extrusion cylinder; and the cooling box is located at the discharge end of the discharge die, characterized in that: The discharge end face of the discharge mold has a plurality of discharge holes evenly distributed circumferentially, and the discharge end passes through the assembly plate at the end of the frame and extends downward. Below the assembly plate, a slicing assembly and a driving assembly are coaxially sleeved on the discharge end of the discharge mold, wherein: The slicing component includes: The bottom ring is fixed to the assembly plate; The bearing is coaxially connected to the support ring of the discharge mold; The bearing is fitted onto the outer side of the bottom ring via a swing ring; Several blades are radially inserted between the swing ring and the support ring. Both sides of the blades are provided with cutting edges, and the cutting edges of each blade are axially offset from the discharge hole. The drive assembly is connected to the swing ring, which drives the blade to perform high-frequency micro-amplitude reciprocating oscillations around the axis of the discharge mold. An unlocking rod is coaxially inserted inside the support ring. The outer end of the unlocking rod is provided with an air injection port, and the inner end is provided with several radial air inlets connected to the air injection port. The support ring is circumferentially distributed with several inclined air outlet holes, the axis of which forms an angle of 20°-30° with the blade surface, and the air outlet direction is towards the cutting edge. The drive assembly includes: an arc-shaped housing whose center coincides with the rotation axis of the swing ring; Two electromagnetic components are symmetrically arranged at both ends of the arc-shaped shell, and the telescopic end of each electromagnetic component is fixedly connected to a push rod; The slider is slidably installed in the arc-shaped slide rail of the arc-shaped housing, and its two ends are respectively fixed to the two push rods; The anti-fool spring is coaxially sleeved on the outside of the push rod, with its two ends abutting against the electromagnetic housing and the slider, respectively. The connecting rod is hinged at one end to the slider and at the other end to the swing ring; The two electromagnetic components extend and retract alternately, driving the slider to slide back and forth along the arc-shaped slide rail via the push rod, and then converting the high-frequency micro-amplitude oscillation of the pendulum ring through the connecting rod.

2. The high-efficiency, low-consumption PET slice refining device as described in claim 1, characterized in that, The swing ring and the support ring are respectively circumferentially distributed with a number of radially extending first slots and second slots. The blade surface is provided with reinforcing ribs, and its two ends are respectively provided with insert plates corresponding to the first slot and plugs corresponding to the second slot.

3. The high-efficiency, low-consumption PET slice refining device as described in claim 2, characterized in that, The bottom ring is circumferentially distributed with several radial locking plates, the number of which is the same as the blade. Each lock plate contains: Return spring: Both ends abut against the inner wall of the lock plate and the end face of the lock rod, respectively; Locking rod: Extends outward under the force of the return spring, with the extended end penetrating the end of the lock plate; Toggle block: vertically fixed to the inner end of the lock bar and extends to the outer side of the lock plate.

4. The high-efficiency, low-consumption PET slice refining device as described in claim 3, characterized in that, The surface of the insert plate is provided with a guide groove, and the end of the locking rod passes through and extends into the guide groove of the insert plate.

5. The high-efficiency, low-consumption PET slice refining device as described in claim 2, characterized in that, The unlocking rod is located at one end of the support ring and has several locking plates evenly distributed around its circumference, the number of which is the same as the number of blades; The plug surface is provided with an annular groove; The locking piece has a radially protruding locking block at its end, which normally engages with an annular groove to form a circumferential constraint.

6. The high-efficiency, low-consumption PET slice refining device as described in claim 5, characterized in that, The unlocking rod is located inside the support ring and has a top rod at one end. A force spring is coaxially sleeved on the outside of the top rod. The two ends of the force spring abut against the inner end face of the unlocking rod and the root of the locking piece, respectively, driving the locking block to press into the slot.

7. A high-efficiency, low-consumption PET chip refining process, applied to the high-efficiency, low-consumption PET chip refining apparatus according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Raw material pretreatment and extrusion molding: After drying the PET raw material, add it to the extrusion cylinder, start the extrusion motor to heat and plasticize it; Molten PET is extruded vertically downwards through the circumferentially distributed discharge holes of the discharge die, forming multiple thin strips. S2, Strip Cooling and Shaping: The extruded high-temperature strip enters the cooling box for forced air cooling or water mist cooling, so that the surface of the strip is solidified and shaped; S3, Dynamic Cutting of Blades: The electromagnetic components of the drive assembly are activated, and the swing ring is driven to reciprocate at high frequency through the slider and connecting rod. This causes the blade to swing at high frequency around the axis of the discharge end of the discharge mold. The blades on both sides are used to cut the material strip alternately. The blade edges are always kept axially misaligned with the discharge hole. During the swing, the blade edges cut the material strip laterally. S4. Anti-sticking and online cleaning: Compressed air / nitrogen is introduced through the air injection port of the unlocking rod. The gas is sprayed out from the inclined air outlet of the support ring through the air inlet, blowing the blade edge at a 20°-30° angle to cool the blade edge and prevent PET melt from sticking. S5. Slice Collection and Blade Maintenance: After cutting, the PET slices are separated by a vibrating sieve to remove debris and collect uniform slices. Quick tool change procedure: a. Press the lever to retract the locking bar and release the blade insert plate from the lock; b. Lift the unlocking lever, and the force spring will be compressed by the push rod to disengage the locking plate from the annular groove of the plug; c. The old blade is pulled out radially, and the new blade is inserted and automatically locked.

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