Plastic waste recycling device for plastic packaging box defective product regeneration

Abstract

The invention relates to the technical field of plastic recycling, and discloses a plastic waste recycling device for plastic packaging box defective product regeneration, which comprises a support table, a cracking bin arranged on the support table, a feeding port arranged at the top of the cracking bin, a motor arranged on one side of the cracking bin, and a cracking unit arranged in the cracking bin, the breaking unit comprises a breaking assembly arranged in the breaking bin and extrusion assemblies arranged on the two sides of the breaking assembly, the breaking assembly is used for breaking the plastic packaging box, and the extrusion assemblies are used for driving the breaking assembly to extrude the plastic packaging box in a reciprocating mode. The breaking assembly is driven by the driving shaft to rotate at a high speed, and shearing and breaking force is generated on the plastic packaging box. And meanwhile, the extrusion assembly is meshed with transmission teeth through reciprocating teeth, so that the breaking assembly synchronously generates reciprocating linear motion, and a rotating and reciprocating composite breaking mode is formed. And compared with traditional single rotary crushing, the breaking time of the large-size packaging box can be effectively shortened, and the single-time handling capacity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic recycling, and in particular to a plastic waste recycling device for regenerating defective plastic packaging boxes. Background Art

[0002] In the recycling and processing of defective plastic packaging boxes, pre-treatment for their fracture is required. Traditional crushing devices often use a dual-fixed crushing roller design, where the two rollers rotate in opposite directions to shear and crush the plastic packaging boxes. Although this fixed structure is simple to operate, it has significant drawbacks in actual application: First, due to the fixed position of the crushing rollers, relying solely on the shear force generated by rotation is difficult to handle large-sized industrial packaging boxes with reinforced ribs or thick-walled structures. For materials with cavities, such as hollow folding boxes, the air buffer layer significantly weakens the crushing effect, causing material jamming and blockage, and prone to equipment downtime. Second, when dealing with composite materials such as PE / PP blends and calcium carbonate fillers, the fixed rollers are unable to generate alternating stress. Tough plastics easily wrap around the roller shaft, while hard fillers are difficult to separate from the base resin, causing the impurity content of the recycled material to exceed the standard, increasing subsequent cleaning and sorting costs. Furthermore, the plastic packaging boxes cannot be quickly drawn into the crushing process, resulting in relatively low crushing efficiency.

[0003] In addition, the traditional double-roller structure lacks adjustment capabilities and cannot adjust the crushing force and method according to the material specifications, resulting in excessive crushing of lightweight materials and insufficient crushing of thick-walled turnover boxes; at the same time, the constant gap between the fixed rollers easily forms a crushing blind spot, resulting in uneven particle size distribution, affecting the quality stability of the recycled material. Summary of the Invention

[0004] In view of the problems in the existing technology that traditional double fixed crushing rollers have many processing defects, low efficiency and incomplete crushing, a plastic waste recycling device for regenerating defective plastic packaging boxes is proposed.

[0005] Its purpose is to provide a plastic waste recycling device that can efficiently crush and has strong adaptability. Through the synergistic effect of rotation and reciprocating extrusion, it can solve the problems of jamming, entanglement, and incomplete crushing of traditional double-fixed crushing rollers, and improve the quality of recycled materials.

[0006] The technical solution of the present invention is a plastic waste recycling device for regenerating defective plastic packaging boxes, comprising a support platform, a crushing chamber arranged on the support platform, a feeding port arranged at the top of the crushing chamber, a motor arranged on one side of the crushing chamber, and a crushing unit arranged inside the crushing chamber; The rupture unit includes a rupture component arranged inside the rupture chamber, and extrusion components arranged on both sides of the rupture component, the rupture component is used to break the plastic packaging box, and the extrusion component is used to drive the rupture component to reciprocate and extrude the plastic packaging box; The extrusion assembly includes a drive shaft arranged on the motor output shaft, a bearing arranged at one end of the drive shaft, a reciprocating tooth arranged on the other side of the drive shaft, a transmission tooth arranged on one side of the reciprocating tooth, and a transmission shaft arranged in the middle of the drive tooth.

[0007] Furthermore, the extrusion assembly also includes movable holes passing through the two ends of the rupture chamber, the transmission shaft is slidably connected in the movable holes, a limit frame is arranged on the transmission shaft, two raised plates are arranged at one end of the limit frame, driving rods are respectively arranged on the opposite sides of the raised plates, driving grooves are symmetrically arranged on both sides of the reciprocating teeth, the driving rod is slidably connected in the driving groove, two limit rods are arranged on one side of the limit frame and are symmetrically distributed up and down, the middle part of the limit frame is rotatably connected to the transmission shaft, two limit grooves are opened on the outer surface of the rupture chamber and match the size of the limit rods, and the limit rods are limited and slidably connected in the limit grooves.

[0008] Furthermore, the reciprocating teeth are cam-shaped as a whole and are composed of two gears with different diameters.

[0009] Furthermore, the two extrusion components are symmetrically distributed on both sides of the rupture chamber.

[0010] Furthermore, the connection between the two gears constituting the reciprocating teeth is smoothly connected to each other, and the connection is in an empty tooth state.

[0011] Furthermore, the crushing assembly includes crushing rollers respectively arranged on the drive shaft and the transmission shaft, the two crushing rollers rotate towards each other, and a mobile bin arranged on one side of the crushing bin, and the crushing roller located on the transmission shaft moves in the mobile bin.

[0012] Furthermore, the driving grooves are distributed equidistantly on both sides of the reciprocating tooth along the outer edge of the reciprocating tooth.

[0013] Furthermore, the transmission teeth are circular, and their thickness is smaller than that of the reciprocating teeth.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The synergistic effect of rotary crushing and reciprocating extrusion improves crushing efficiency. Driven by the drive shaft, the crushing component rotates at high speed, generating shearing and crushing forces on plastic cartons. Simultaneously, the extrusion component, through the meshing of reciprocating teeth with the transmission teeth, generates a synchronous reciprocating linear motion in the crushing component, creating a combined "rotational and reciprocating" crushing mode. Compared to traditional single-rotation crushing, this effectively shortens the crushing time of large cartons and increases the single-pass processing capacity.

[0015] 2. Dynamic extrusion accelerates the descent of materials. The extrusion force generated by the reciprocating motion actively pushes the packaging box into the center of the rupture component, avoiding downtime and cleanup caused by material jams. This is particularly suitable for processing difficult-to-crush materials such as folding boxes and hollow board boxes with cavity structures. Furthermore, by adjusting the amplitude of the reciprocating motion, the device can adaptively process packaging boxes of different sizes.

[0016] The 3.0-diameter gear segment acts as the driving wheel, connected to the motor output shaft, providing stable driving force. When the smaller-diameter gear segment acts as the driven wheel and meshes with the transmission teeth, the diameter difference creates an eccentric drive effect, exerting greater extrusion pressure on thick-walled structures. This design avoids the complex structure of traditional eccentric wheels and connecting rods, shortens the transmission chain, and improves energy transfer efficiency. Furthermore, the asymmetric profile of the cam structure produces a variable acceleration effect during reciprocating motion, causing the blade to periodically change its cutting angle as it rotates, effectively preventing entanglement of long fibers or film-like materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the front structure of the rupture chamber of the present invention; Figure 3 This is a schematic diagram of the back structure of the rupture chamber of the present invention; Figure 4 This is a schematic diagram of the bottom structure of the rupture chamber of the present invention when viewed from above; Figure 5 This is a schematic diagram of the overall structure of the extrusion assembly and the rupture assembly of the present invention; Figure 6 It is a schematic diagram of the partial exploded structure of the extrusion assembly of the present invention; Figure 7 Schematic diagram of the three-dimensional structure of the movable hole and the limiting groove of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the limiting frame of the present invention; Figure 9 It is a schematic diagram of the three-dimensional structure of the reciprocating tooth of the present invention.

[0018] In the picture: 1. Support platform; 11. Crushing chamber; 12. Feeding port; 13. Motor; 2. Extrusion assembly; 21. Drive shaft; 22. Reciprocating teeth; 23. Transmission teeth; 24. Transmission shaft; 25. Moving hole; 26. Limiting frame; 27. Raised plate; 28. Drive rod; 29. ​​Drive slot; 30. Limiting rod; 31. Limiting slot; 4. Crushing assembly; 41. Crushing roller; 42. Moving chamber. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0020] Example 1, reference Figures 1-9 , which is the first embodiment of the present invention, provides a plastic waste recycling device for regenerating defective plastic packaging boxes, including a support platform 1, a crushing bin 11 installed on the support platform 1, a feeding port 12 installed on the top of the crushing bin 11, a motor 13 installed on one side of the crushing bin 11, and a crushing unit installed inside the crushing bin 11; the crushing unit includes a crushing component 4 installed inside the crushing bin 11, and extrusion components 2 installed on both sides of the crushing component 4, the crushing component 4 is used to crush the plastic packaging box, and the extrusion component 2 is used to drive the crushing component 4 to reciprocate and extrude the plastic packaging box; the extrusion component 2 includes a drive shaft 21 that is transmission-connected to the output shaft of the motor 13, a bearing arranged at one end of the drive shaft 21, a reciprocating tooth 22 fixedly connected to the other side of the drive shaft 21, a transmission tooth 23 meshingly connected to one side of the reciprocating tooth 22, and a transmission shaft 24 fixedly connected to the middle of the drive tooth.

[0021] Specifically, when recycling defective plastic packaging boxes, some larger plastic packaging boxes need to be broken first to break them into smaller pieces, and then crushed. During the breaking process, the motor 13 is started, and the output shaft of the motor 13 drives the drive shaft 21 to rotate. The drive shaft 21 drives the transmission shaft 24 to rotate through the extrusion component 2. The transmission shaft 24 and the drive shaft 21 synchronously drive the breaking component 4 to rotate, and the plastic packaging box put into the feeding port 12 is broken. During the breaking process, the reciprocating teeth 22 in the extrusion component 2 rotate to drive the transmission teeth 23 to rotate, so that the breaking component 4 can continuously reciprocate while rotating the broken plastic packaging box, squeezing the plastic packaging box, which not only makes it easier for it to fall into the middle of the breaking component 4, but also speeds up the breaking speed of the plastic packaging box.

[0022] The synergistic effect of rotary crushing and reciprocating extrusion improves crushing efficiency. Driven by the drive shaft 21, the crushing assembly 4 rotates at high speed, generating shearing and crushing forces on the plastic packaging boxes. Simultaneously, the meshing of the reciprocating teeth 22 and the transmission teeth 23 of the extrusion assembly 2 causes the crushing assembly 4 to generate synchronous reciprocating linear motion, creating a combined "rotational and reciprocating" crushing mode. Compared to traditional single-rotation crushing, this design effectively shortens the crushing time of large-sized packaging boxes and increases single-pass processing capacity. Furthermore, dynamic extrusion accelerates the drop of material, while the extrusion force generated by the reciprocating motion actively pushes the packaging box into the center of the crushing assembly 4, avoiding downtime and cleaning caused by material jams. This is particularly suitable for processing difficult-to-crush packaging such as folding boxes and hollow board boxes with cavity structures. Furthermore, by adjusting the amplitude of the reciprocating motion (achievable by replacing the reciprocating teeth 22 with different modules), the device can adapt to processing packaging boxes of varying sizes. For industrial boxes with reinforced ribs and thick walls, reciprocating extrusion can preemptively disrupt stress concentration points, reducing crushing resistance. In addition, for composite material packaging boxes such as PE / PP blends and calcium carbonate fillings, the alternating stress generated by reciprocating motion can effectively overcome the entanglement problem of tough plastics. At the same time, through multiple extrusions, the hard filler is separated from the matrix resin, thereby improving the subsequent cleaning and sorting efficiency.

[0023] Reference Figure 5-Figure 9 The extrusion assembly 2 also includes a movable hole 25 that passes through both ends of the rupture bin 11, the transmission shaft 24 is slidably connected in the movable hole 25, a limit frame 26 installed on the transmission shaft 24, two raised plates 27 fixedly connected to one end of the limit frame 26, and drive rods 28 fixedly connected to the opposite sides of the raised plates 27, respectively, and drive grooves 29 symmetrically opened on both sides of the reciprocating teeth 22. The drive rod 28 is slidably connected in the drive groove 29, and two limit rods 30 are fixedly connected to one side of the limit frame 26 and are symmetrically distributed up and down. The middle part of the limit frame 26 is rotatably connected to the transmission shaft 24, and two limit grooves 31 are opened on the outer surface of the rupture bin 11 and match the size of the limit rod 30. The limit rod 30 is limited and slidably connected in the limit groove 31.

[0024] Specifically, when the drive shaft 21 rotates, the drive shaft 21 drives the reciprocating teeth 22 to rotate, and the reciprocating teeth 22 drives the transmission teeth 23 to rotate. Since the limit frame 26 is laterally limited in the limit groove 31 by the limit rod 30, and the drive rod 28 is limited in the drive groove 29, when the reciprocating teeth 22 drives the transmission teeth 23 to rotate, the transmission teeth 23 always maintain a meshing state with the reciprocating teeth 22. During this process, the transmission teeth 23 will be continuously pushed away and pulled closer by the reciprocating teeth 22, so that the rupture component 4 continues to move back and forth during the self-rotation crushing process, that is, during the crushing process, the plastic packaging box is continuously squeezed back and forth, so that it can quickly enter the rupture component 4 and be crushed. The limiting frame 26, through the sliding engagement of the limiting rod 30 and the limiting groove 31, forms a lateral constraint on the drive shaft 24, ensuring that the drive teeth 23 always remain engaged with the reciprocating teeth 22, preventing gear slippage or tooth stripping caused by axial movement. The crushing assembly 4 combines rotation with reciprocating motion, creating a combined "shear and squeeze" crushing mode. This can significantly shorten the crushing time and improve crushing efficiency for thicker PP turnover boxes. When processing boxes with cavities, the reciprocating squeeze action can first break down the air buffer layer, reducing crushing resistance.

[0025] Reference Figure 9 The reciprocating tooth 22 is cam-shaped as a whole and is composed of two gears with different diameters.

[0026] Specifically, the large-diameter gear segment, acting as the driving wheel and connected to the output shaft of motor 13, provides stable driving force. When the small-diameter gear segment, acting as the driven wheel, meshes with transmission teeth 23, the diameter difference creates an eccentric drive effect, exerting greater compressive force on thick-walled structures. This design avoids the complex structure of traditional eccentric wheels and connecting rods, shortens the transmission chain, and improves energy transfer efficiency. Furthermore, the asymmetric profile of the cam structure produces a variable acceleration effect during reciprocating motion, causing the blade to periodically change its cutting angle as it rotates, effectively preventing entanglement of long fibers or film-like materials.

[0027] Reference Figure 2-Figure 5 The two extrusion components 2 are symmetrically distributed on both sides of the rupture chamber 11.

[0028] Specifically, the symmetrical arrangement can effectively improve the stability of the rupture assembly 4 when it is broken, especially for the rupture of thick-walled plastic packaging box structures.

[0029] Reference Figure 6 and Figure 9 The two gears constituting the reciprocating teeth 22 are smoothly connected to each other at their connection points, and the connection points are in an empty tooth state.

[0030] Specifically, the smooth transition zone ensures that when the transmission teeth 23 switch from the large-diameter gear segment to the small-diameter gear segment, the contact stress between the gear teeth is reduced, the rigid impact of the traditional stepped gear is avoided, and the meshing dead point is eliminated; and the width of the empty tooth zone provides free sliding time for the transmission teeth 23, so that the gear pair completes inertia buffering during the switching process.

[0031] Example 2, reference Figure 4 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the crushing assembly 4 includes crushing rollers 41 fixedly connected to the drive shaft 21 and the transmission shaft 24 respectively, the two crushing rollers 41 rotate towards each other, and a mobile bin 42 is arranged on one side of the inside of the crushing bin 11, and the crushing rollers 41 located on the transmission shaft 24 move in the mobile bin 42.

[0032] Specifically, when the rupture assembly 4 is driven, the two crushing rollers 41 rotate toward each other to crush the plastic packaging boxes that fall therein, and the movable bin 42 facilitates the movement of the crushing rollers 41 on the transmission shaft 24, thereby squeezing and crushing the plastic packaging boxes.

[0033] Reference Figure 9 The driving grooves 29 are equidistantly distributed on both sides of the reciprocating tooth 22 along the outer edge of the reciprocating tooth 22 .

[0034] Specifically, because the limiting grooves 31 are evenly distributed along the outer edge of the reciprocating teeth 22, the transmission teeth 23 are always tightly engaged with the reciprocating teeth 22, ensuring their reciprocating movement while achieving stable transmission of rotational power during crushing.

[0035] Reference Figure 6 The transmission tooth 23 is circular and its thickness is less than that of the reciprocating tooth 22.

[0036] Specifically, it facilitates the stable sliding of the driving rod 28 on the limiting frame 26 in the driving groove 29. The remaining structures are the same as those of the first embodiment.

[0037] Summarizing Examples 1-2, the operating principle of the present invention is as follows: After the motor 13 is started, the output shaft drives the drive shaft 21 to rotate. The cam-shaped reciprocating teeth 22 on the drive shaft 21 (composed of two gears of different diameters smoothly connected with hollow teeth at the connection) rotate accordingly, driving the drive shaft 24 through the meshing circular transmission teeth 23. Because the limit frame 26 is laterally constrained within the limit slot 31 by the limit rod 30, the drive rod 28 slides within the drive slots 29 on either side of the reciprocating teeth 22, causing the transmission teeth 23 to be pushed and pulled together by the reciprocating teeth 22. This in turn drives the crushing assembly 4 to reciprocate along the movable hole 25 while rotating. The two crushing rollers 41 of the crushing assembly 4 rotate in opposite directions, and the reciprocating movement forms a combined "rotational shearing and reciprocating extrusion" crushing mode: the rotation shears the packaging box at high speed, while the reciprocating movement squeezes the material into the crushing area, breaking the air buffer layer of the cavity structure. The symmetrical distribution of the extrusion assembly 2 ensures crushing stability, and the hollow teeth structure provides inertial cushioning and reduces impact when the gear diameter switches. By replacing the reciprocating teeth 22 with different modules, the amplitude can be adjusted to adapt to packaging boxes of different specifications and achieve efficient rupture pretreatment.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A plastic waste recycling device for regenerating defective plastic packaging boxes, comprising a support platform (1), a crushing chamber (11) arranged on the support platform (1), a feeding port (12) arranged at the top of the crushing chamber (11), and a motor (13) arranged on one side of the crushing chamber (11), characterized in that: It also includes a rupture unit arranged inside the rupture chamber (11); The rupture unit comprises a rupture component (4) arranged inside the rupture chamber (11), and extrusion components (2) arranged on both sides of the rupture component (4), the rupture component (4) being used to crush the plastic packaging box, and the extrusion component (2) being used to drive the rupture component (4) to reciprocate and extrude the plastic packaging box; The extrusion assembly (2) includes a drive shaft (21) arranged on the output shaft of the motor (13), a bearing arranged at one end of the drive shaft (21), a reciprocating tooth (22) arranged on the other side of the drive shaft (21), a transmission tooth (23) arranged on one side of the reciprocating tooth (22), and a transmission shaft (24) arranged in the middle of the drive tooth.

2. The plastic waste recycling device for regenerating defective plastic packaging boxes according to claim 1 is characterized in that: The extrusion assembly (2) further includes a movable hole (25) extending through both ends of the rupture chamber (11), a transmission shaft (24) slidingly connected in the movable hole (25), a limiting frame (26) provided on the transmission shaft (24), two raised plates (27) provided at one end of the limiting frame (26), a driving rod (28) provided on opposite sides of the raised plates (27), a driving groove (29) symmetrically provided on both sides of the reciprocating teeth (22), the driving rod (28) slidingly connected in the driving groove (29), two limiting rods (30) symmetrically distributed in upper and lower directions provided on one side of the limiting frame (26), a middle portion of the limiting frame (26) rotatably connected to the transmission shaft (24), two limiting grooves (31) provided on the outer surface of the rupture chamber (11) and matching in size with the limiting rods (30), the limiting rods (30) slidingly connected in the limiting grooves (31).

3. The plastic waste recycling device for regenerating defective plastic packaging boxes according to claim 2 is characterized in that: The reciprocating teeth (22) are cam-shaped as a whole and are composed of two gears with different diameters.

4. The plastic waste recycling device for regenerating defective plastic packaging boxes according to claim 1 is characterized in that: The two extrusion assemblies (2) are symmetrically distributed on both sides of the rupture chamber (11).

5. The plastic waste recycling device for regenerating defective plastic packaging boxes according to claim 4 is characterized in that: The connection points of the two gears constituting the reciprocating teeth (22) are smoothly connected to each other, and the connection points are in an empty tooth state.

6. The plastic waste recycling device for regenerating defective plastic packaging boxes according to claim 1 is characterized in that: The crushing assembly (4) comprises crushing rollers (41) respectively arranged on the drive shaft (21) and the transmission shaft (24), the two crushing rollers (41) rotating towards each other, and a moving chamber (42) arranged on one side inside the crushing chamber (11), the crushing roller (41) located on the transmission shaft (24) moving in the moving chamber (42).

7. The plastic waste recycling device for regenerating defective plastic packaging boxes according to claim 2 is characterized in that: The driving grooves (29) are respectively distributed at equal intervals on both sides of the reciprocating tooth (22) along the outer edge of the reciprocating tooth (22).

8. The plastic waste recycling device for regenerating defective plastic packaging boxes according to claim 1 is characterized in that: The transmission teeth (23) are circular, and their thickness is smaller than that of the reciprocating teeth (22).

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