PET (Polyethylene Terephthalate) film extrusion die based on plastic recycling

Abstract

The invention discloses a PET film extrusion mold based on plastic recycling, and relates to the technical field of PET film production, the PET film extrusion mold comprises injection molding equipment, the injection molding equipment is arranged at the top of the ground, injection molding frames are fixedly mounted on the front and rear sides of the injection molding equipment, butt joint frames are fixedly mounted at the tops of the injection molding frames, and upper molds are slidably mounted on the circumferential surfaces of the butt joint frames; a connecting frame is fixedly installed on the right side of the injection molding equipment, a servo motor is fixedly installed on the top of the connecting frame, a lead screw is fixedly installed at the output end of the servo motor, a T-shaped rod is slidably installed on the inner wall of the connecting frame, and a feeding box is fixedly installed on the top of the injection molding equipment. The T-shaped rod cannot rotate, so that the gap between the lower mold and the upper mold is fixed, the gap between the lower mold and the upper mold is fixed by limiting the T-shaped rod not to move vertically, and then it is ensured that the gap between the upper mold and the lower mold is kept stable and unchanged in the production process.

Description

Technical Field

[0001] The present invention relates to the technical field of PET film production, and specifically relates to a PET film extrusion die based on plastic recycling. Background Art

[0002] A PET film extrusion die based on plastic recycling usually consists of upper and lower dies, injection molding equipment, driving equipment, protective components and other parts.

[0003] The patent with the patent announcement number CN219634476U relates to a PET film extrusion die, including a base. A heating box is arranged on the top of the base, an extrusion die is arranged on the top of the base on the right side of the heating box, and a melt pump is arranged on the top of the base between the heating box and the extrusion die. For this PET film extrusion die based on plastic recycling, by setting a servo motor, starting the servo motor drives the front rotating shaft to rotate through the output shaft, and through the cooperation of two gears, the front and rear rotating shafts drive two crushing rollers to rotate to crush the raw materials, avoiding the influence of different sizes and heating areas of raw material particles on the melting rate of the raw materials. At the same time, through the setting of a driving motor, starting the driving motor knocks on the side wall of the feeding hopper through the cooperation of a disc, a round shaft and a rubber hammer, avoiding the blockage of the crushed raw materials and affecting the work efficiency of the staff, greatly improving the practicability of the device and facilitating the use of the staff.

[0004] In the above patent, by starting the driving motor to knock on the side wall of the feeding hopper through the cooperation of a disc, a round shaft and a rubber hammer, the blockage of the crushed raw materials is avoided, the work efficiency of the staff is not affected, the practicability of the device is greatly improved, and it is convenient for the staff to use. However, it is difficult to fix the gap between the lower die and the upper die. Due to the instability of the gap between the upper die and the lower die, unqualified film products frequently appear, which requires additional inspection and trimming, and results in frequent shutdown of the production line or frequent intervention of the operator, thus reducing the production efficiency. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a PET film extrusion die based on plastic recycling, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A PET film extrusion die based on plastic recycling, including an injection molding device, the injection molding device is arranged on the top of the ground, injection molding frames are fixedly installed on the front and rear sides of the injection molding device, a docking frame is fixedly installed on the top of the injection molding frame, an upper die is slidably installed on the circumferential surface of the docking frame, a connection frame is fixedly installed on the right side of the injection molding device, a servo motor is fixedly installed on the top of the connection frame, a lead screw is fixedly installed at the output end of the servo motor, a T-shaped rod is slidably installed on the inner wall of the connection frame, a feed box is fixedly installed on the top of the injection molding device, the feed box is used for putting the recycled plastic, a stepping motor is fixedly installed on the left side of the feed box, a rotating rod is fixedly installed at the output end of the stepping motor; a linkage plate, the linkage plate is fixedly installed on the circumferential surface of the rotating rod, the linkage plate is used for detecting the operating state of the feed box, a load-bearing rod is fixedly installed on the top of the injection molding device; a load-bearing plate, the load-bearing plate is slidably installed on the circumferential surface of the load-bearing rod, protective rings are fixedly penetrated through the upper and lower walls of the load-bearing plate, the protective rings are used for limiting the lead screw; a groove ring, the groove ring is fixedly installed on the circumferential surface of the lead screw; an elastic telescopic block, the elastic telescopic block is fixedly installed on the left side of the connection frame, the elastic telescopic block is used for limiting the load-bearing plate, the injection molding device is internally communicated with the lower die, by starting the servo motor to drive the rotation of the lead screw, the rotation of the lead screw drives the vertical movement of the T-shaped rod, the vertical movement of the T-shaped rod drives the vertical movement of the upper die, the vertical movement of the upper die further adjusts the gap between the lower die and the upper die, the lead screw cannot rotate so that the T-shaped rod cannot rotate, and the gap between the lower die and the upper die is fixed when the T-shaped rod cannot rotate.

[0007] According to the above technical solution, the T-shaped rod is threadedly connected to the lead screw, the bottom of the T-shaped rod is fixedly connected to the upper die, and the fixed connection between the T-shaped rod and the upper die enables the T-shaped rod to drive the vertical movement of the upper die when the T-shaped rod moves vertically, and a lower die is slidably installed on the circumferential surface of the docking frame.

[0008] According to the above technical solution, the top of the load-bearing plate is set to be an arc surface, a first spring is arranged between the load-bearing plate and the injection molding device, when the load-bearing plate moves downward, it squeezes the first spring, the first spring deforms and stores energy under the extrusion of the load-bearing plate, after manually pushing the free end of the elastic telescopic block forward, the load-bearing plate can be driven to reset by the first spring, a dispersion plate is fixedly installed on the circumferential surface of the rotating rod, the rotation of the dispersion plate strikes the recycled plastic inside the feed box, thereby adjusting and refining the particle size of the recycled plastic, and by rotating the dispersion plate to strike the recycled plastic, the recycled plastic can be effectively broken to improve the overall quality of the PET film.

[0009] According to the above technical scheme, a crushing component for secondary crushing of the agglomerated recycled plastic is arranged inside the feed box, a protective component is arranged on the front side of the feed box, the crushing component includes a microporous plate, a connecting rod, a connecting plate, a crushing plate and a hollow block, the agglomerated recycled plastic is squeezed by the crushing plate for secondary dispersion, the microporous plate is fixedly mounted on the inner wall of the feed box, the connecting rod slides through the upper and lower walls of the microporous plate, the connecting plate is fixedly mounted on the bottom of the connecting rod, the crushing plate is fixedly mounted on the circumferential surface of the connecting rod, the hollow block is fixedly mounted on the circumferential surface of the connecting rod, the sieve hole diameter of the microporous plate is smaller than that of the crushing plate, so that the agglomerated recycled plastic can be retained on the top of the microporous plate.

[0010] According to the above technical solution, a reset spring is arranged between the connecting plate and the microporous plate. The connecting plate moves downward to apply a pulling force to the reset spring. The reset spring is pulled by the connecting plate to generate shape and store force. After the dispersion plate continues to rotate and disengages from the contact with the crushing plate, the reset spring can drive the connecting plate to reset. The crushing plate contacts the dispersion plate, and the hollow block contacts the bottom of the microporous plate. The microporous plate is struck by the hollow block to generate vibration and accelerate the discharge speed of the recycled plastic.

[0011] According to the above technical solution, the protective component includes a U-shaped rod, a support frame, a support ring and a support groove. The support groove is opened on the front side of the feed box, the U-shaped rod is fixedly installed on the inner wall of the support groove, the support frame is slidably installed on the circumferential surface of the U-shaped rod, and the support ring is fixedly installed on the circumferential surface of the U-shaped rod. The rubber ring gradually deforms so that the support frame can only move slowly upward.

[0012] According to the above technical solution, a support spring is arranged between the support frame and the support ring. The support frame moves upward due to the squeezing of the crushing plate. The support frame moves back and forth to shield the recycled plastic splashed inside the feed box. The support frame moves upward to apply a pulling force to the support spring. The support spring is deformed and accumulates force due to the pulling of the support frame. After the support frame is out of contact with the crushing plate, the support spring can drive the support frame to reset. A rubber ring is fixedly installed on the inner wall of the support groove, and the support frame contacts the crushing plate.

[0013] According to the above technical solution, the support frame contacts the inner wall of the feed box, the bottom of the support frame is set as an inclined surface, a semicircular groove is opened on the front side of the support frame, and the elastic coefficient of the support spring is smaller than the elastic coefficient of the return spring, so that the support frame can move upward under the squeeze of the crushing plate.

[0014] The present invention provides a PET film extrusion die based on plastic recycling, which has the following beneficial effects: (1) The PET film extrusion die based on plastic recycling adjusts the gap between the lower die and the upper die by vertically moving the upper die. By adjusting the gap between the upper die and the lower die, the thickness of the extruded PET film can be precisely controlled, thus avoiding uneven film layers. By restricting the vertical movement of the T-shaped rod, the gap between the lower die and the upper die is fixed, thereby ensuring that the gap between the upper die and the lower die remains stable and unchanged during production, thus avoiding film thickness errors caused by changes in the gap due to misoperation and reducing the production of unqualified products.

[0015] (2) The PET film extrusion die based on plastic recycling strikes the recycled plastic inside the feed box by rotating the dispersion plate, thereby adjusting and refining the particle size of the recycled plastic. By rotating the dispersion plate to strike the recycled plastic, the recycled plastic can be effectively broken up, thereby improving the overall quality of the PET film, reducing the wear of the lower die and the upper die, and extending the service life of the die.

[0016] (3) The PET film extrusion die based on plastic recycling extrudes the agglomerated recycled plastic remaining on the top of the microporous plate by moving the crushing plate downward. The agglomerated recycled plastic is secondarily dispersed under the extrusion of the crushing plate. Through secondary dispersion and crushing, the size of these agglomerated particles can be effectively reduced, and the risk of blockage of the lower die caused by agglomeration can be reduced.

[0017] (4) The PET film extrusion die based on plastic recycling generates vibrations by the microporous plate being struck by the hollow block and accelerates the feeding speed of the recycled plastic. The vibration helps to accelerate the feeding speed of the recycled plastic and fully mix it with the PET resin, thereby ensuring that the recycled plastic can better bond with the substrate and avoiding affecting the quality of the PET film finished product due to uneven distribution or agglomeration of the recycled plastic.

[0018] (5) The PET film extrusion die based on plastic recycling shields the recycled plastic sputtered inside the feed box by the reciprocating movement of the support frame. At the same time, the rubber ring gradually deforms, causing the support frame to move upward slowly, thereby protecting the components on the surface of the feed box and ensuring the continuity of the feeding of the recycled plastic. Continuous and stable feeding helps to improve the efficiency of the extrusion process of the lower die and the upper die and reduces the downtime caused by component failures or material jams. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the internal structure of the injection molding equipment of the present invention; Figure 3 is the present invention Figure 2Schematic enlarged view of part A structure; Figure 4 Schematic position structure diagram of the lower mold and the upper mold of the present invention; Figure 5 Schematic semi-sectional structure diagram of the feed box of the present invention; Figure 6 Schematic position structure diagram of the load-bearing plate and the elastic telescopic block of the present invention; Figure 7 Schematic internal structure diagram of the feed box of the present invention.

[0020] In the figure: 1, injection molding equipment; 2, injection molding frame; 3, docking frame; 4, lower mold; 5, upper mold; 6, connecting frame; 7, servo motor; 8, lead screw; 9, T-shaped rod; 10, feed box; 11, stepper motor; 12, rotating rod; 13, dispersion plate; 14, linkage plate; 15, load-bearing rod; 16, load-bearing plate; 17, protective ring; 18, groove ring; 19, elastic telescopic block; 201, microporous plate; 202, connecting rod; 203, connecting plate; 204, crushing plate; 205, hollow block; 206, return spring; 211, U-shaped rod; 212, support frame; 213, support ring; 214, support spring; 215, rubber ring; 216, support groove. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-7, an embodiment of the present invention is: a PET film extrusion die based on plastic reuse, including an injection molding device 1, the injection molding device 1 is arranged on the top of the ground, injection molding frames 2 are fixedly installed on the front and rear sides of the injection molding device 1, a docking frame 3 is fixedly installed on the top of the injection molding frame 2, an upper die 5 is slidably installed on the circumferential surface of the docking frame 3, a connection frame 6 is fixedly installed on the right side of the injection molding device 1, a servo motor 7 is fixedly installed on the top of the connection frame 6, a lead screw 8 is fixedly installed at the output end of the servo motor 7, a T-shaped rod 9 is slidably installed on the inner wall of the connection frame 6, a feed box 10 is fixedly installed on the top of the injection molding device 1, the feed box 10 is used for putting the recycled plastic, a stepping motor 11 is fixedly installed on the left side of the feed box 10, and a rotating rod 12 is fixedly installed at the output end of the stepping motor 11; a linkage plate 14, the linkage plate 14 is fixedly installed on the circumferential surface of the rotating rod 12, the linkage plate 14 is used for detecting the operating state of the feed box 10, a load-bearing rod 15 is fixedly installed on the top of the injection molding device 1; a load-bearing plate 16, the load-bearing plate 16 is slidably installed on the circumferential surface of the load-bearing rod 15, protective rings 17 are fixedly penetrated through the upper and lower walls of the load-bearing plate 16, and the protective rings 17 are used for limiting the lead screw 8; a groove ring 18, the groove ring 18 is fixedly installed on the circumferential surface of the lead screw 8; an elastic telescopic block 19, the elastic telescopic block 19 is fixedly installed on the left side of the connection frame 6, and the elastic telescopic block 19 is used for limiting the load-bearing plate 16. The injection molding device 1 is internally communicated with the lower die 4. By restricting the T-shaped rod 9 from moving vertically, the gap between the lower die 4 and the upper die 5 is fixed, thereby ensuring that the gap between the upper die 5 and the lower die 4 remains stable and unchanged during the production process, reducing the generation of unqualified products.

[0023] The T-shaped rod 9 is threadedly connected to the lead screw 8, and the bottom of the T-shaped rod 9 is fixedly connected to the upper die 5. By fixing the T-shaped rod 9 and the upper die 5, the T-shaped rod 9 can drive the upper die 5 to move vertically when the T-shaped rod 9 moves vertically. A lower die 4 is slidably installed on the circumferential surface of the docking frame 3. By adjusting the gap between the upper die 5 and the lower die 4, the thickness of the extruded PET film can be precisely controlled, thereby avoiding uneven film layers.

[0024] The top of the load-bearing plate 16 is set as an arc surface. A first spring is arranged between the load-bearing plate 16 and the injection molding device 1. When the load-bearing plate 16 moves downward, the first spring is compressed. The first spring deforms and stores energy under the extrusion of the load-bearing plate 16. After manually pushing the free end of the elastic telescopic block 19 forward, the load-bearing plate 16 can be driven to reset by the first spring. A dispersion plate 13 is fixedly installed on the circumferential surface of the rotating rod 12. By rotating the dispersion plate 13 to strike the recycled plastic, the recycled plastic can be effectively broken, thereby improving the overall quality of the PET film, reducing the wear of the lower die 4 and the upper die 5, and prolonging the service life of the die.

[0025] During the operation of this embodiment: When it is necessary to adjust the gap between the lower mold 4 and the upper mold 5, the servo motor 7 is started to drive the screw rod 8 to rotate. The rotation of the screw rod 8 drives the T-shaped rod 9 to move vertically. The vertical movement of the T-shaped rod 9 drives the upper mold 5 to move vertically. The vertical movement of the upper mold 5 further adjusts the gap between the lower mold 4 and the upper mold 5. After the adjustment of the gap between the lower mold 4 and the upper mold 5 is completed, the injection molding device 1 is started for injection molding operation. At the same time, the stepping motor 11 is started to operate. The operation of the stepping motor 11 drives the rotating rod 12 to rotate. The rotation of the rotating rod 12 drives the linkage plate 14 to rotate. The rotation of the linkage plate 14 contacts the arc surface of the load-bearing plate 16 and squeezes the load-bearing plate 16. The load-bearing plate 16 moves downward under the extrusion of the linkage plate 14. The downward movement of the load-bearing plate 16 drives the protective ring 17 to move downward. The downward movement of the protective ring 17 contacts the groove of the groove ring 18 and limits the groove ring 18. The groove ring 18 being limited by the protective ring 17 makes the screw rod 8 unable to rotate. The screw rod 8 being unable to rotate makes the T-shaped rod 9 unable to rotate. The T-shaped rod 9 being unable to rotate fixes the gap between the lower mold 4 and the upper mold 5. And the load-bearing plate 16 moves downward to disengage from the limit of the free end of the elastic telescopic block 19. After the limit of the free end of the elastic telescopic block 19 is released, the free end of the elastic telescopic block 19 moves backward under the action of its own elastic force to limit the top of the load-bearing plate 16. At the same time, the recycled plastic is added into the injection molding device 1 through the feed box 10. The rotation of the rotating rod 12 drives the dispersion plate 13 to rotate. The dispersion plate 13 rotates to strike the recycled plastic inside the feed box 10, thereby adjusting and refining the particle size of the recycled plastic.

[0026] Please refer to Figures 1-7 , on the basis of the above embodiment, in another embodiment of the present invention, a crushing assembly for secondary crushing of the agglomerated recycled plastic is provided inside the feed box 10. A protective assembly is provided on the front side of the feed box 10. The crushing assembly includes a microporous plate 201, a connecting rod 202, a connecting plate 203, a crushing plate 204, and a hollow block 205. The microporous plate 201 is fixedly installed on the inner wall of the feed box 10. The connecting rod 202 slidably penetrates the upper and lower walls of the microporous plate 201. The connecting plate 203 is fixedly installed at the bottom of the connecting rod 202. The crushing plate 204 is fixedly installed on the circumferential surface of the connecting rod 202. The hollow block 205 is fixedly installed on the circumferential surface of the connecting rod 202. The diameter of the sieve holes of the microporous plate 201 is smaller than that of the crushing plate 204, so that the agglomerated recycled plastic can stay on the top of the microporous plate 201. Through secondary dispersion and crushing, the size of these agglomerated particles can be effectively reduced, and the risk of blockage of the lower mold 4 caused by agglomeration can be reduced.

[0027] A return spring 206 is arranged between the connection plate 203 and the microplate 201. When the connection plate 203 moves downward, a pulling force is applied to the return spring 206. The return spring 206 deforms and stores energy under the pulling of the connection plate 203. After the dispersion plate 13 continues to rotate and disengages from the contact with the crushing plate 204, the connection plate 203 can be driven to reset by the return spring 206. The crushing plate 204 contacts the dispersion plate 13, and the hollow block 205 contacts the bottom of the microplate 201. The microplate 201 vibrates under the knocking of the hollow block 205, and the feeding speed of the recycled plastic is accelerated. The vibration helps to accelerate the feeding speed of the recycled plastic and fully mix it with the PET resin, so as to ensure that the recycled plastic can better combine with the substrate.

[0028] The protection component includes a U-shaped rod 211, a support frame 212, a support ring 213 and a support groove 216. The support groove 216 is opened on the front side of the feeding box 10. The U-shaped rod 211 is fixedly installed on the inner wall of the support groove 216. The support frame 212 is slidably installed on the circumferential surface of the U-shaped rod 211. The support ring 213 is fixedly installed on the circumferential surface of the U-shaped rod 211. The rubber ring 215 gradually deforms, so that the support frame 212 can only move upward slowly. Continuous and stable feeding and anti-sputtering help to improve the efficiency of the extrusion process of the lower die 4 and the upper die 5, and reduce the downtime caused by component failures or material jams.

[0029] A support spring 214 is arranged between the support frame 212 and the support ring 213. When the support frame 212 moves upward, a pulling force is applied to the support spring 214. The support spring 214 deforms and stores energy under the pulling of the support frame 212. After the support frame 212 disengages from the contact with the crushing plate 204, the support frame 212 can be driven to reset by the support spring 214. A rubber ring 215 is fixedly installed on the inner wall of the support groove 216. The support frame 212 quickly moves upward and contacts the rubber ring 215 and applies pressure. The rubber ring 215 gradually deforms under the extrusion of the support frame 212. The support frame 212 can be buffered and protected by the rubber ring 215, and the support frame 212 abuts against the crushing plate 204.

[0030] The support frame 212 contacts the inner wall of the feeding box 10. The bottom of the support frame 212 is set as an inclined surface. A semi-circular groove is opened on the front side of the support frame 212. The elastic coefficient of the support spring 214 is smaller than that of the return spring 206, so that the support frame 212 can move upward under the extrusion of the crushing plate 204.

[0031] During the operation of this embodiment: The dispersion plate 13 rotates and contacts the crushing plate 204 and squeezes the crushing plate 204. The crushing plate 204 moves downward under the extrusion of the dispersion plate 13. The downward movement of the crushing plate 204 drives the connecting rod 202 to move downward, and the downward movement of the connecting rod 202 drives the connecting plate 203 to move downward. The downward movement of the crushing plate 204 squeezes the plastic after the agglomerates are recovered and retained on the top of the microporous plate 201. The plastic after the agglomerates are recovered is secondarily dispersed under the extrusion of the crushing plate 204. After the dispersion plate 13 continues to rotate and disengages from the contact with the crushing plate 204, the connecting plate 203 moves upward under the elastic force of the return spring 206. The upward movement of the connecting plate 203 drives the connecting rod 202 to move upward, and the upward movement of the connecting rod 202 drives the crushing plate 204 to move upward and reset. At the same time, the upward movement of the connecting rod 202 drives the hollow block 205 to move upward. The upward movement of the hollow block 205 knocks on the bottom of the microporous plate 201. The microporous plate 201 vibrates under the knocking of the hollow block 205 and accelerates the feeding speed of the recovered plastic.

[0032] The crushing plate 204 moves downward and disengages from the contact with the support frame 212. After the support frame 212 disengages from the contact with the crushing plate 204, the support frame 212 moves downward and resets under the elastic force of the support spring 214. When the connecting rod 202 moves upward and drives the crushing plate 204 to move upward and reset, the crushing plate 204 moves upward and contacts the bottom of the support frame 212 and squeezes the support frame 212. The support frame 212 moves upward under the extrusion of the crushing plate 204. The reciprocating movement of the support frame 212 shields the recovered plastic sputtered inside the feed box 10. At the same time, if the support frame 212 is impacted by a larger piece of recovered plastic, the support frame 212 moves upward rapidly under the impact of the large piece of recovered plastic. The support frame 212 moves upward rapidly and contacts the rubber ring 215 and applies pressure. The rubber ring 215 gradually deforms under the extrusion of the support frame 212. The gradual deformation of the rubber ring 215 enables the support frame 212 to move upward slowly, thereby protecting the components on the surface of the feed box 10 and ensuring the continuity of the feeding of the recovered plastic.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PET film extrusion die based on plastic recycling, characterized in that: The invention comprises an injection molding device (1), wherein the injection molding device (1) is arranged on the top of the ground, an injection molding frame (2) is fixedly installed on the front and rear sides of the injection molding device (1), a docking frame (3) is fixedly installed on the top of the injection molding frame (2), an upper mold (5) is slidably installed on the circumferential surface of the docking frame (3), a connecting frame (6) is fixedly installed on the right side of the injection molding device (1), a servo motor (7) is fixedly installed on the top of the connecting frame (6), a screw rod (8) is fixedly installed on the output end of the servo motor (7), a T-shaped rod (9) is slidably installed on the inner wall of the connecting frame (6), a feed box (10) is fixedly installed on the top of the injection molding device (1), the feed box (10) is used to put recycled plastic, a stepping motor (11) is fixedly installed on the left side of the feed box (10), and a rotating rod (12) is fixedly installed on the output end of the stepping motor (11); A linkage plate (14), the linkage plate (14) being fixedly mounted on the circumferential surface of the rotating rod (12), the linkage plate (14) being used to detect the operating status of the feed box (10), and a load-bearing rod (15) being fixedly mounted on the top of the injection molding equipment (1); A load-bearing plate (16), the load-bearing plate (16) being slidably mounted on the circumferential surface of the load-bearing rod (15), and a protective ring (17) being fixedly penetrated through the upper and lower walls of the load-bearing plate (16), the protective ring (17) being used to limit the position of the screw rod (8); A groove ring (18), wherein the groove ring (18) is fixedly mounted on the circumferential surface of the screw rod (8); An elastic telescopic block (19), wherein the elastic telescopic block (19) is fixedly mounted on the left side of the connecting frame (6), and the elastic telescopic block (19) is used to limit the position of the load-bearing plate (16).

2. A PET film extrusion die based on plastic recycling according to claim 1, characterized in that: The T-shaped rod (9) is threadedly connected to the screw rod (8), the bottom of the T-shaped rod (9) is fixedly connected to the upper mold (5), the lower mold (4) is slidably mounted on the circumferential surface of the docking frame (3), a crushing component for secondary crushing of agglomerated recycled plastics is arranged inside the feed box (10), and a protective component is arranged on the front side of the feed box (10).

3. A PET film extrusion die based on plastic recycling according to claim 2, characterized in that: The top of the load-bearing plate (16) is arranged as an arc surface, a spring 1 is arranged between the load-bearing plate (16) and the injection molding equipment (1), and a dispersion plate (13) is fixedly mounted on the circumferential surface of the rotating rod (12).

4. A PET film extrusion die based on plastic recycling according to claim 3, characterized in that: The crushing assembly comprises a microporous plate (201), a connecting rod (202), a connecting plate (203), a crushing plate (204) and a hollow block (205); the microporous plate (201) is fixedly mounted on the inner wall of the feed box (10); the connecting rod (202) slides through the upper and lower walls of the microporous plate (201); the connecting plate (203) is fixedly mounted on the bottom of the connecting rod (202); the crushing plate (204) is fixedly mounted on the circumferential surface of the connecting rod (202); and the hollow block (205) is fixedly mounted on the circumferential surface of the connecting rod (202).

5. A PET film extrusion die based on plastic recycling according to claim 4, characterized in that: A return spring (206) is provided between the connecting plate (203) and the microporous plate (201), the crushing plate (204) is in contact with the dispersion plate (13), and the hollow block (205) is in contact with the bottom of the microporous plate (201).

6. A PET film extrusion die based on plastic recycling according to claim 5, characterized in that: The protection assembly comprises a U-shaped rod (211), a support frame (212), a support ring (213) and a support groove (216); the support groove (216) is provided on the front side of the feed box (10); the U-shaped rod (211) is fixedly mounted on the inner wall of the support groove (216); the support frame (212) is slidably mounted on the circumferential surface of the U-shaped rod (211); and the support ring (213) is fixedly mounted on the circumferential surface of the U-shaped rod (211).

7. A PET film extrusion die based on plastic recycling according to claim 6, characterized in that: A support spring (214) is provided between the support frame (212) and the support ring (213); a rubber ring (215) is fixedly mounted on the inner wall of the support groove (216); and the support frame (212) is in contact with the crushing plate (204).

8. A PET film extrusion die based on plastic recycling according to claim 7, characterized in that: The support frame (212) contacts the inner wall of the feed box (10), the bottom of the support frame (212) is arranged as an inclined surface, and a semicircular groove is provided on the front side of the support frame (212).

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