A children's backpack hot-pressing device based on plastic waste recycling

Abstract

This invention discloses a hot-pressing device for children's backpacks based on the recycling and reuse of plastic waste, relating to the field of hot-pressing technology. It includes a frame; a hot-pressing die is fixedly installed on a worktable inside the frame; a heating pipe is installed inside the hot-pressing die; the heating pipe is connected to a heating device inside the frame; a protruding module is fitted onto the top of the hot-pressing die; the protruding module is fixedly installed at the bottom of a moving plate; the moving plate is fixedly installed with an electric push cylinder; the electric push cylinder is fixedly installed on the top plate of the frame; when the plastic sheet to be hot-pressed is transported to the top via a transfer frame, and the electric push cylinder drives the moving plate and the protruding module downwards to cooperate with the hot-pressing die for hot pressing, the connecting plate engages with the gears through the meshing of the toothed plate and the gears, and the engagement between the push post on the outer side of the annular block and the second arc-shaped groove. At this time, the rotating cylinder rotates counterclockwise, and the rotating cylinder drives the lifting rotating rod to rotate through the protruding post, thereby moving the suction cup at the bottom of the mounting frame to one side of the hot-pressing die to avoid interference with the hot pressing process.

Description

Technical Field

[0001] This invention relates specifically to the field of hot pressing technology, and more specifically to a hot pressing device for children's backpacks based on the recycling and reuse of plastic waste. Background Technology

[0002] With the continuous growth of global plastic consumption, the environmental pollution and resource waste caused by plastic waste are becoming increasingly prominent. According to relevant industry reports, more than 100 million tons of plastic waste enter the natural environment every year. Among them, commonly used plastics such as polyethylene and polypropylene have long degradation cycles, causing long-term damage to soil and aquatic ecosystems. The core links of plastic waste recycling and reuse include crushing, washing, and melting molding, while hot pressing is a key process for transforming recycled plastics into structural components such as backpack shells and back panels. Currently, existing hot pressing devices for plastic products are mainly divided into two categories: one is heavy-duty hot presses for large industrial plastic parts, which have a wide range of pressure and temperature adjustment, but are bulky, energy-intensive, and have poor mold adaptability, making it difficult to meet the production needs of children's backpacks in multiple specifications and small batches; the other is small desktop hot pressing equipment, which is convenient to operate, but generally suffers from low temperature control accuracy and uneven pressure distribution, resulting in uneven thickness and weak local welding of recycled plastic sheets after hot pressing, failing to meet the structural strength and safety standards required for children's backpacks; in addition, traditional equipment usually uses manual operation for loading and unloading, and the surface temperature of the hot-pressed product is high, which can easily cause burns when people come into contact with the product. Moreover, the surface of the product still has a certain degree of softness after hot pressing, and manual handling may cause defects or fingerprints on the surface of the product, which will affect the quality of the product. Traditional hot pressing devices require manual intervention during loading and unloading. With the development of equipment, automatic loading devices have emerged. However, these automatic loading devices require a central control unit to drive different devices individually. This can cause interference between the loading device and the hot pressing device, affecting the efficiency of the equipment. Summary of the Invention

[0003] The purpose of this invention is to provide a hot-pressing device for children's backpacks based on the recycling and reuse of plastic waste. In this device, the feeding component and the rotary drive component are installed together. During hot pressing, as the moving plate rises and falls, the connecting plate synchronously drives the toothed plate. The toothed plate meshes with the gear, enabling the gear to drive the drive pulley and the rotating structure to rotate synchronously. The drive pulley achieves the lifting and lowering effect of the feeding component through its cooperation with the eccentric structure. Through the cooperation between the lever on the rotating structure and the arc plate, and the first and second arc grooves and the first and second notches, the crossbar at the top of the lifting and rotating rod alternately feeds materials, thereby improving production efficiency and ensuring product quality, thus solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A children's backpack hot-pressing device based on the recycling and reuse of plastic waste includes a frame; a hot-pressing die is fixedly installed on a worktable inside the frame; a heating tube is provided inside the hot-pressing die; the heating tube is connected to a heating device inside the frame; a protruding module is fitted on the top of the hot-pressing die; the protruding module is fixedly installed on the bottom of a moving plate; the moving plate is fixedly installed with an electric push cylinder; the electric push cylinder is fixedly installed on the top plate of the frame. A drive structure is fixedly installed on the side wall of the frame; the drive structure includes a support frame; a rotating shaft is movably installed on the support plate inside the support frame via a bearing; a gear is fixedly installed at one end of the rotating shaft; a drive pulley and a rotating structure are provided at the other end of the rotating shaft; wherein, the drive pulley is connected to the eccentric structure; and the rotating structure is connected to the rotating drive assembly.

[0005] As a further technical solution of the present invention, the rotary drive assembly includes two support frames; a rotary cylinder is movably installed between the two support frames; the cross-section of the rotary cylinder is I-shaped; a first arc-shaped groove and a second arc-shaped groove are provided on the outer wall of the rotary cylinder; the first arc-shaped groove and the second arc-shaped groove are X-shaped; a first notch and a second notch are provided at both ends of the first arc-shaped groove and the second arc-shaped groove; the first notch and the second notch on the same side are on the same cross-section; a C-shaped slot is provided on the inner wall of the rotary cylinder, and when the material is fed by the lifting rotary rod, the protrusion on the side wall of the lifting rotary rod engages with the C-shaped slot to ensure the synchronous rotation between the lifting rotary rod and the rotary cylinder, thereby achieving the effect of alternating feeding by the two suction cups at the bottom of the crossbar; As a further technical solution of the present invention, a feeding assembly is movably installed inside the rotating cylinder; the feeding assembly includes a lifting rotating rod; a protruding column is integrally provided on the side wall of the lifting rotating rod; the protruding column is engaged with a C-shaped slot opened on the inner wall of the rotating cylinder; a crossbar is fixedly installed on the top of the lifting rotating rod; mounting frames are fixedly installed at the bottom of both ends of the crossbar; a suction cup is fixedly installed at the bottom of the mounting frame, and when the suction cup is feeding and unloading, the suction cup moves up and down through the cooperation between the insert column in the eccentric structure and the lifting guide frame, ensuring that when one suction cup is feeding material on the hot press die, the other suction cup adsorbs the plastic plate on the transfer frame. As a further technical solution of the present invention, an L-shaped rod is installed at the bottom of the lifting and rotating rod via a bearing movable rod; a lifting guide frame is fixedly installed on the side wall of the L-shaped rod away from the lifting and rotating rod; a guide groove is provided inside the lifting guide frame; the lifting guide frame cooperates with the eccentric structure; when the insert column moves along the guide groove inside the lifting guide frame, the double round head plate drives the insert column to rotate eccentrically, thereby realizing that the lifting and rotating rod can move up and down while moving up and down along the inner wall of the rotating cylinder; As a further technical solution of the present invention, the eccentric structure includes a driven pulley; the driven pulley is connected to the driven pulley by a belt drive pulley; the driven pulley is coaxially provided with a double round head plate; a column is fixedly installed at the other end of the double round head plate; the column extends into the interior of the lifting guide frame; the shaft between the driven pulley and the double round head plate is movably installed on the side wall of the frame through a bearing seat.

[0006] As a further technical solution of the present invention, the rotating structure includes an annular block; the annular block is coaxially arranged with the drive pulley; the annular block is fixedly installed with the rotating shaft of the gear; two sets of symmetrical push pins are integrally arranged on the side wall of the annular block; one set of symmetrical push pins has an arc-shaped plate at the end away from the annular block; the other set of push pins cooperates with the first arc-shaped groove and the second arc-shaped groove opened on the side wall of the rotating cylinder; when the inner push pin cooperates with the first arc-shaped groove, the rotating cylinder rotates to the left as a whole; when the annular block drives the other push pin to cooperate with the second arc-shaped groove, the rotating cylinder rotates to the right as a whole; the left and right rotation of the rotating cylinder realizes the effect of automatic alternating feeding of the suction cups at the bottom of both ends of the crossbar. As a further technical solution of the present invention, the two arc-shaped plates respectively cooperate with the first notch and the second notch corresponding to the two ends of the first arc-shaped groove and the second arc-shaped groove; when the two arc-shaped plates cooperate with the first notch and the second notch on the same side, the stability of the L-shaped rod driving the lifting and rotating rod to rise and fall is ensured. As a further technical solution of the present invention, a connecting plate is fixedly installed at one top end of the movable plate; the connecting plate is bent; a toothed plate is fixedly installed at the end of the connecting plate away from the movable plate; the toothed plate is meshed with a gear.

[0007] Compared with the prior art, the beneficial effects of the present invention are: 1. In use, the plastic sheet to be hot-pressed is transported to the top position by a transfer frame. When the electric push cylinder drives the moving plate and the convex module downward to cooperate with the hot pressing die for hot pressing, the connecting plate achieves the cooperation between the push post on the outer side of the annular block and the second arc groove through the meshing between the toothed plate and the gear. At this time, the rotating cylinder rotates counterclockwise. The rotating cylinder drives the lifting rotating rod to rotate counterclockwise through the convex post, thereby moving the suction cup at the bottom of the mounting frame to one side of the hot pressing die to avoid interference with the hot pressing. 2. In this invention, after hot pressing is completed, the toothed plate drives the gear to rotate clockwise. At this time, another pin of the annular block cooperates with the first arc groove to make the rotating cylinder drive the lifting rotating rod to rotate clockwise, and rotate the plastic plate on the suction cup at the bottom of the other mounting bracket to the top of the hot pressing die. 3. In this invention, after the two pins are engaged with the first and second arc-shaped grooves respectively, the arc-shaped plates at the ends of another set of pins engage with the first and second notches corresponding to the ends of the first and second arc-shaped grooves respectively. When the arc-shaped plates engage with the notches, the driving pulley drives the driven pulley to rotate through the belt. The double round-headed plate coaxially mounted on the driven pulley drives the pin to move along the guide groove inside the lifting guide frame. The middle position of the guide groove is arc-shaped. In this way, when the pin engages with the guide groove, the lifting guide frame and the L-shaped rod synchronously drive the lifting rotating rod to move up and down. 4. In this invention, when the push pin engages with the first arc-shaped groove, the mounting bracket at the bottom right end of the crossbar effectively uses suction cups to apply negative pressure to the plastic plate on the transfer frame, while the suction cup at the left end places the plastic plate onto the hot-pressing die. When the other push pin engages with the second arc-shaped groove, the suction cup at the right end is rotated above the hot-pressing die for feeding, thus achieving the effect of alternating feeding by the suction cups at both ends of the crossbar, reducing manual intervention. Attached Figure Description

[0008] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0009] Figure 2 In this invention Figure 1 A schematic diagram of the rear structure.

[0010] Figure 3 In this invention Figure 1 Side view.

[0011] Figure 4 In this invention Figure 3 Bottom view.

[0012] Figure 5 In this invention Figure 4 A partial structural assembly diagram.

[0013] Figure 6 In this invention Figure 5 Another perspective structural diagram.

[0014] Figure 7 In this invention Figure 6 The main view.

[0015] Figure 8 In this invention Figure 7 Another perspective on the split diagram.

[0016] Figure 9 In this invention Figure 8 A schematic diagram of the rear side.

[0017] Figure 10 In this invention Figure 1 Enlarged view of point A in the middle.

[0018] Figure 11 In this invention Figure 4 Enlarged view of section B in the middle.

[0019] In the diagram: 1-Frame, 2-Transfer frame, 3-Hot pressing die, 4-Moving plate, 5-Connecting plate, 6-Gear plate, 7-Electric pusher cylinder, 8-Drive structure, 80-Support frame, 81-Gear, 9-Heating tube, 10-Drive pulley, 11-Protruding module, 12-Feeding assembly, 120-Lifting rotating rod, 121-Horizontal bar, 122-Mounting frame, 123-Suction cup, 124-L-shaped rod, 125-Lifting guide frame. 126-Protruding column, 13-Rotary drive assembly, 130-Support frame, 131-Rotating cylinder, 132-First notch, 133-First arc groove, 134-Second notch, 135-Second arc groove, 14-Belt, 15-Rotating structure, 150-Pulley, 151-Arc plate, 152-Annular block, 16-Eccentric structure, 160-Insertion column, 161-Double round head plate, 162-Driven pulley. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-7 In this embodiment of the invention, a children's backpack hot-pressing device based on the recycling and reuse of plastic waste includes a frame 1; a hot-pressing die 3 is fixedly installed on the worktable inside the frame 1; a heating tube 9 is provided inside the hot-pressing die 3; the heating tube 9 is connected to a heating device inside the frame 1; a protruding module 11 is fitted on the top of the hot-pressing die 3; the protruding module 11 is fixedly installed on the bottom of a moving plate 4; the moving plate 4 is fixedly installed with an electric push cylinder 7; the electric push cylinder 7 is fixedly installed on the top plate of the frame 1. A drive structure 8 is fixedly installed on the side wall of the frame 1; the drive structure 8 includes a support frame 80; a rotating shaft is movably installed on the support plate inside the support frame 80 via a bearing; a gear 81 is fixedly installed at one end of the rotating shaft; a drive pulley 10 and a rotating structure 15 are provided at the other end of the rotating shaft; wherein, the drive pulley 10 is connected to an eccentric structure 16; and the rotating structure 15 is connected to a rotating drive assembly 13. The rotary drive assembly 13 includes two support frames 130; a rotating cylinder 131 is movably mounted between the two support frames 130; the cylinder has an I-shaped cross-section; a first arc-shaped groove 133 and a second arc-shaped groove 135 are provided on the outer wall of the rotating cylinder 131; the first arc-shaped groove 133 and the second arc-shaped groove 135 are arranged in an X-shape; a first notch 132 and a second notch 134 are provided at both ends of the first arc-shaped groove 133 and the second arc-shaped groove 135; the first notch 132 and the second notch 134 on the same side are on the same cross-section; a C-shaped slot is provided on the inner wall of the rotating cylinder 131.

[0022] By adopting the above technical solution, during use, the plastic sheet to be hot-pressed is transported to the top position through the transfer frame 2. When the electric push cylinder 7 drives the moving plate 4 and the convex module 11 downward to cooperate with the hot pressing die 3 for hot pressing, the connecting plate 5 achieves the cooperation between the push post 150 on the outer side of the annular block 152 and the second arc groove 135 through the meshing between the toothed plate 6 and the gear 81. At this time, the rotating cylinder 131 rotates counterclockwise. The rotating cylinder 131 drives the lifting rotating rod 120 to rotate counterclockwise through the protruding column 126, thereby moving the suction cup 123 at the bottom of the mounting frame 122 to one side of the hot pressing die 3 to avoid interference with the hot pressing.

[0023] Please see Figure 1-9Further, regarding the above technical solution, the eccentric structure 16 includes a driven pulley 162; the driven pulley 162 is connected to the driving pulley 10 via a belt 14; a double round-head plate 161 is coaxially arranged on the driven pulley 162; a column 160 is fixedly installed at the other end of the double round-head plate 161; the column 160 extends into the interior of the lifting guide frame 125; the shaft between the driven pulley 162 and the double round-head plate 161 is movably installed on the side wall of the frame 1 via a bearing with a seat. Preferably, the rotating structure 15 includes an annular block 152; the annular block 152 is coaxially arranged with the drive pulley 10; the annular block 152 is fixedly installed with the rotating shaft of the gear 81; two sets of symmetrical paddles 150 are integrally arranged on the side wall of the annular block 152; one set of symmetrical paddles 150 has an arc-shaped plate 151 at the end away from the annular block 152; the other set of paddles 150 cooperates with the first arc-shaped groove 133 and the second arc-shaped groove 135 opened on the side wall of the rotating cylinder 131; By adopting the above technical solution, after hot pressing is completed, the toothed plate 6 drives the gear 81 to rotate clockwise. At this time, the other pin 150 of the annular block 152 cooperates with the first arc groove 133 to realize that the rotating cylinder 131 drives the lifting rotating rod 120 to rotate clockwise, and rotates the plastic plate on the bottom suction cup 123 of the other mounting bracket 122 to the top of the hot pressing die 3.

[0024] Please see Figure 7-11 Preferably, a feeding assembly 12 is movably installed inside the rotating cylinder 131; the feeding assembly 12 includes a lifting rotating rod 120; a protruding column 126 is integrally provided on the side wall of the lifting rotating rod 120; the protruding column 126 is engaged with a C-shaped slot opened on the inner wall of the rotating cylinder 131; a crossbar 121 is fixedly installed on the top of the lifting rotating rod 120; mounting brackets 122 are fixedly installed at the bottom of both ends of the crossbar 121; and suction cups 123 are fixedly installed at the bottom of the mounting brackets 122. Furthermore; an L-shaped rod 124 is installed at the bottom of the lifting and rotating rod 120 via a bearing movable rod; a lifting guide frame 125 is fixedly installed on the side wall of the L-shaped rod 124 away from the lifting and rotating rod 120; a guide groove is provided inside the lifting guide frame 125; the lifting guide frame 125 cooperates with the eccentric structure 16; By adopting the above technical solution, after the two levers 150 are engaged with the first arc-shaped groove 133 and the second arc-shaped groove 135 respectively, the arc-shaped plates 151 at the ends of the other set of levers 150 engage with the first notch 132 and the second notch 134 at the ends of the first arc-shaped groove 133 and the second arc-shaped groove 135 respectively. When the arc-shaped plates engage with the notches, the driving pulley 10 drives the driven pulley 162 to rotate through the belt 14. The double round head plate 161 coaxially mounted on the driven pulley 162 drives the insert 160 to move along the guide groove inside the lifting guide frame 125. The middle position of the guide groove is arc-shaped. In this way, when the insert 160 engages with the guide groove, the lifting guide frame 125 and the L-shaped rod 124 synchronously drive the lifting rotating rod 120 to move up and down.

[0025] In this embodiment, the two arc-shaped plates 151 respectively cooperate with the first notch 132 and the second notch 134 corresponding to the two ends of the first arc-shaped groove 133 and the second arc-shaped groove 135; A connecting plate 5 is fixedly installed at one end of the top of the movable plate 4; the connecting plate 5 is bent; a toothed plate 6 is fixedly installed at the end of the connecting plate 5 away from the movable plate 4; the toothed plate 6 is meshed with a gear 81. By adopting the above technical solution, when the pusher 150 cooperates with the first arc groove 133, the mounting bracket 122 at the bottom right end of the crossbar 121 effectively uses suction cup 123 to negatively adsorb the plastic plate on the transfer frame 2, and the suction cup 123 at the left end places the plastic plate onto the hot pressing die 3. When the other pusher 150 cooperates with the second arc groove 135, the suction cup 123 at the right end is rotated to the top of the hot pressing die 3 for feeding, thereby achieving the effect of alternating feeding by the suction cups 123 at both ends of the crossbar 121, reducing manual intervention.

[0026] The working principle of this invention is as follows: When in use, the plastic sheet to be hot-pressed is transported to the top position through the transfer frame 2. When the electric push cylinder 7 drives the moving plate 4 and the convex module 11 downward to cooperate with the hot pressing die 3 for hot pressing, the connecting plate 5 achieves the cooperation between the push post 150 on the outer side of the annular block 152 and the second arc groove 135 through the meshing between the toothed plate 6 and the gear 81. At this time, the rotating cylinder 131 rotates counterclockwise. The rotating cylinder 131 drives the lifting rotating rod 120 to rotate counterclockwise through the protruding post 126, thereby moving the suction cup 123 at the bottom of the mounting frame 122 to one side of the hot pressing die 3 to avoid interference with the hot pressing. After hot pressing is completed, the toothed plate 6 drives the gear 81 to rotate clockwise. At this time, the other pin 150 of the ring block 152 cooperates with the first arc groove 133 to realize that the rotating cylinder 131 drives the lifting rotating rod 120 to rotate clockwise, and rotates the plastic plate on the bottom suction cup 123 of the other mounting bracket 122 to the top of the hot pressing die 3. After the two levers 150 are engaged with the first arc groove 133 and the second arc groove 135 respectively, the arc plates 151 at the ends of the other set of levers 150 engage with the first notch 132 and the second notch 134 at the ends of the first arc groove 133 and the second arc groove 135 respectively. When the arc plates engage with the notches, the driving pulley 10 drives the driven pulley 162 to rotate through the belt 14. The double round head plate 161 coaxially mounted on the driven pulley 162 drives the insert 160 to move along the guide groove inside the lifting guide frame 125. The middle position of the guide groove is arc-shaped. In this way, when the insert 160 engages with the guide groove, the lifting guide frame 125 and the L-shaped rod 124 synchronously drive the lifting rotating rod 120 to move up and down. When the push pin 150 engages with the first arc groove 133, the mounting bracket 122 at the bottom right end of the crossbar 121 effectively uses suction cup 123 to apply negative pressure to the plastic plate on the transfer frame 2, and the suction cup 123 at the left end places the plastic plate onto the hot pressing die 3. When the other push pin 150 engages with the second arc groove 135, the suction cup 123 at the right end is rotated to the top of the hot pressing die 3 for feeding, thereby achieving the effect of alternating feeding by the suction cups 123 at both ends of the crossbar 121, reducing manual intervention.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat-pressing device for children's backpacks based on the recycling and reuse of plastic waste, characterized in that: The system includes a frame (1); a hot pressing die (3) is fixedly installed on the worktable inside the frame (1); a heating pipe (9) is provided inside the hot pressing die (3); the heating pipe (9) is connected to a heating device inside the frame (1); a protruding module (11) is provided on the top of the hot pressing die (3); the protruding module (11) is fixedly installed on the bottom of the moving plate (4); the moving plate (4) is fixedly installed with an electric push cylinder (7); the electric push cylinder (7) is fixedly installed on the top plate of the frame (1). A drive structure (8) is fixedly installed on the side wall of the frame (1); the drive structure (8) includes a support frame (80); a rotating shaft is movably installed on the support plate inside the support frame (80) via a bearing; a gear (81) is fixedly installed at one end of the rotating shaft; a drive pulley (10) and a rotating structure (15) are provided at the other end of the rotating shaft; wherein; the drive pulley (10) is connected to the eccentric structure (16); the rotating structure (15) is connected to the rotating drive assembly (13).

2. The plastic waste recycling based child backpack hot-pressing device according to claim 1, characterized in that: The rotary drive assembly (13) includes two support frames (130); a rotary cylinder (131) is movably installed between the two support frames (130); the cross-section of the rotary cylinder (131) is I-shaped; a first arc groove (133) and a second arc groove (135) are provided on the outer wall of the rotary cylinder (131); the first arc groove (133) and the second arc groove (135) are X-shaped; a first notch (132) and a second notch (134) are provided at both ends of the first arc groove (133) and the second arc groove (135); the first notch (132) and the second notch (134) on the same side are on the same cross-section; a C-shaped slot is provided on the inner wall of the rotary cylinder (131).

3. The plastic waste recycling based child backpack thermoforming device according to claim 1, wherein: The rotating cylinder (131) is equipped with a feeding assembly (12); the feeding assembly (12) includes a lifting rotating rod (120); a protruding column (126) is integrally provided on the side wall of the lifting rotating rod (120); the protruding column (126) is engaged with a C-shaped slot on the inner wall of the rotating cylinder (131); a crossbar (121) is fixedly installed on the top of the lifting rotating rod (120); mounting brackets (122) are fixedly installed at the bottom of both ends of the crossbar (121); a suction cup (123) is fixedly installed at the bottom of the mounting bracket (122).

4. The plastic waste recycling based child backpack hot-pressing device according to claim 3, characterized in that: The bottom of the lifting and rotating rod (120) is equipped with an L-shaped rod (124) via a bearing movable rod; a lifting guide frame (125) is fixedly installed on the side wall of the L-shaped rod (124) away from the lifting and rotating rod (120); a guide groove is provided inside the lifting guide frame (125); the lifting guide frame (125) cooperates with the eccentric structure (16).

5. The plastic waste recycling based child backpack thermoforming device according to claim 4, characterized in that: The eccentric structure (16) includes a driven pulley (162); the driven pulley (162) is connected to the driving pulley (10) via a belt (14); the driven pulley (162) is coaxially provided with a double round head plate (161); the other end of the double round head plate (161) is fixedly installed with a column (160); the column (160) extends into the interior of the lifting guide frame (125); the shaft between the driven pulley (162) and the double round head plate (161) is movably installed on the side wall of the frame (1) via a bearing seat.

6. The plastic waste recycling based child backpack thermoforming device according to claim 1, characterized in that: The rotating structure (15) includes an annular block (152); the annular block (152) is coaxially arranged with the drive pulley (10); the annular block (152) is fixedly installed with the shaft of the gear (81); two sets of symmetrical pegs (150) are integrally arranged on the side wall of the annular block (152); one set of symmetrical pegs (150) has an arc plate (151) at one end away from the annular block (152); the other set of pegs (150) cooperates with the first arc groove (133) and the second arc groove (135) opened on the side wall of the rotating cylinder (131).

7. The children's backpack heat-pressing device based on plastic waste recycling according to claim 4, characterized in that: The two arc plates (151) are respectively matched with the first notch (132) and the second notch (134) at both ends of the first arc groove (133) and the second arc groove (135).

8. The children's backpack heat-pressing device based on plastic waste recycling according to claim 1, characterized in that: A connecting plate (5) is fixedly installed at one top end of the movable plate (4); the connecting plate (5) is bent; a toothed plate (6) is fixedly installed at the end of the connecting plate (5) away from the movable plate (4); the toothed plate (6) is meshed with a gear (81).

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