A waste recycling device for foam board production

Abstract

This invention relates to the field of foam waste recycling technology, specifically to a waste recycling device for foam board production. It includes a housing, a differentially rotatable annular conveyor belt, and an annular pressure belt. The annular pressure belt has evenly distributed cutting grooves. An upper rotating seat and a lower rotating seat are rotatably mounted on the housing. A drive frame is rotatably mounted on the upper rotating seat, and two half-tooth gear rings and one active gear ring are mounted on the drive frame. A set of crushing chambers is opened on the upper rotating seat, and each crushing chamber is equipped with a crushing system. The crushing system includes a rotating shaft, on which a linkage gear meshing with the active gear ring is fixedly mounted, and two symmetrically arranged transmission screws are rotatably mounted. The beneficial effects of this invention are: by dynamically adjusting the crushing self-adaptive mechanism, staged heating, extrusion coordination, differential pretreatment linkage, and integrated power transmission, this invention solves the problems of material jamming, uneven cutting, low compression density, and poor coordination in traditional equipment.

Description

Technical Field

[0001] This invention relates to the field of foam waste recycling technology, specifically to a waste recycling device for foam board production. Background Technology

[0002] During the production and processing of foam boards, a large amount of scraps, defective products, and other foam waste is generated due to operational errors and process requirements in cutting, molding, and other procedures. The main components of these wastes are high-molecular materials such as polystyrene, which are characterized by their loose volume, low density, and high toughness. Direct disposal of these wastes would not only cause serious waste of resources but also bring environmental pressure due to their difficulty in natural degradation. Therefore, the efficient recycling and utilization of foam board waste has become an important issue for the sustainable development of the industry.

[0003] Currently, there are still many technical challenges in the practical application of foam board waste recycling devices on the market:

[0004] In the crushing process, traditional equipment often uses a fixed spacing design for the crushing blades. When processing foam waste with large volume differences, two major problems can easily occur: First, large pieces or loose waste may get stuck due to insufficient space, causing the equipment to stop. Second, small pieces of waste may not be cut sufficiently due to the fixed spacing of the blades, resulting in a large deviation in the particle size of the crushed material, which affects the uniformity of subsequent processing.

[0005] The crushed foam waste remains loose and has extremely low density. It requires further compression during subsequent transportation, storage, and melting for reuse. However, existing recycling devices generally suffer from insufficient compression force and uneven heating and softening. On the one hand, the traditional spiral extrusion structure lacks a targeted preheating and softening design, making it difficult to compact the foam waste due to its high toughness, resulting in low compressed density. On the other hand, the heating device lacks precise temperature control, which can easily lead to local overheating and material degradation, or insufficient heating and poor compression effect, seriously affecting the quality of raw materials for subsequent melting and regeneration. Based on this, the present invention provides a waste recycling device for foam board production to solve the problems mentioned in the background art. Summary of the Invention

[0006] This invention solves the problems of material jamming, uneven cutting, low compression density, and poor coordination in traditional equipment by using a multi-system synergy of dynamic crushing adaptive adjustment, staged heating, extrusion coordination, differential pretreatment linkage, and integrated power transmission.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A waste recycling device for foam board production includes a shell, and also includes a ring conveyor belt and a ring pressing belt that can rotate at different speeds. The ring pressing belt is evenly distributed with slitting grooves. An upper rotating seat and a lower rotating seat are rotatably mounted on the shell. A drive frame is rotatably mounted on the upper rotating seat. Two half-tooth gear rings and one active gear ring are respectively mounted on the drive frame. A set of crushing chambers is opened on the upper rotating seat. Each crushing chamber is equipped with a crushing system.

[0008] The pulverizing system includes a rotating shaft, on which a linkage gear meshing with a drive gear ring is fixedly mounted. Two symmetrically arranged transmission screws are rotatably mounted. Both transmission screws are rotatably connected to an upper rotating seat. A return torsion spring is provided at the rotatable connection between the two transmission screws and the upper rotating seat. An upper gear is mounted on each of the two transmission screws and drives a pressing shell. The two upper gears are respectively driven by two half-tooth gear rings. The two pressing shells are slidably connected to the pulverizing chamber. An outer blade ring is rotatably mounted on each of the two pressing shells. A set of inner blade rings is arranged between the two outer blade rings. Both the outer blade rings and the inner blade rings are driven by the rotating shaft. Elastic rubber sleeves are connected between each pair of inner blade rings and between the two outer blade rings and the adjacent inner blade rings. Four pulverizing blades are rotatably mounted on each of the outer blade rings and the inner blade rings. A driven gear is mounted on each pulverizing blade. Four toothed plates are mounted on the blade shaft. The four toothed plates mesh with the driven gears at corresponding positions.

[0009] The lower rotary seat has four extrusion chambers, each with an extrusion shaft rotatably mounted inside. The extrusion shaft is equipped with a spiral extrusion blade. A discharge pipe is connected to the housing at the position corresponding to the upper rotary seat. A servo motor is installed at the bottom of the housing. The upper rotary seat, lower rotary seat, extrusion shaft, and drive frame are all driven by the servo motor. An electric heating arc plate is installed on the housing at the position corresponding to the lower rotary seat.

[0010] The beneficial effects of this invention are:

[0011] 1. Addressing the issues of large material jamming and insufficient cutting of small pieces caused by the fixed blade spacing in traditional crushing equipment, this invention achieves a breakthrough improvement through a dynamic linkage design of the crushing system. The relative rotation of the upper rotating seat and the drive frame causes the semi-toothed gear ring to periodically mesh with the upper gear on the transmission screw. Under the reset action of the return torsion spring, the extrusion shell slides back and forth along the crushing chamber, causing the distance between the outer and inner blade rings to change dynamically. When large pieces or loose waste enter, the distance automatically increases to avoid jamming. After the material is initially compressed, the distance decreases to enhance the cutting force. At the same time, the rotating shaft drives the outer and inner blade rings to revolve through a regular hexagonal square transmission section. The blade shaft tooth plate meshes with the passive gear of the crushing blade to achieve rotation. Combined with the expansion and contraction of the elastic rubber cylinder, a composite crushing mechanism of revolution cutting, rotation crushing, and dynamic material aggregation is formed. This collaborative design reduces the particle size deviation of the crushed waste and solves the problem of poor adaptability of traditional fixed blade spacing equipment to foam waste with large volume differences. It creatively realizes the adaptive adjustment of the crushing process.

[0012] 2. To address the shortcomings of existing compression mechanisms, such as insufficient compression force and uneven heating, this invention constructs a graded synergistic system of pretreatment preheating and precise heating compression. During the feeding stage, the electric heating table on the inner side of the annular conveyor belt preheats and softens the surface of the waste material at 80-100℃, reducing its toughness and facilitating initial compression. During the compression stage, the electric heating arc plate on the outer side of the lower rotary extruder is precisely heated at 120-150℃, which, combined with the mechanical extrusion of the spiral extrusion blades, forms a linkage effect of thermal softening and mechanical compaction. Compared with the traditional spiral extrusion structure that lacks preheating, this design increases the compression density of foam waste. At the same time, the microcontroller precisely controls the temperature of the electric heating table and the electric heating arc plate, avoiding the problem of material degradation or insufficient heating caused by local overheating, ensuring that the uniformity of the compressed material meets the requirements for melt regeneration, and creatively solving the problem of insufficient synergy between heating and compression.

[0013] 3. To address the issues of low feeding efficiency and incomplete initial cutting of fluffy foam waste in traditional conveying equipment, this invention designs a collaborative system of a differentially rotating annular conveyor belt and annular pressure belt. The linear speed of the annular pressure belt is 1.05-1.2 times that of the conveyor belt. The resulting differential kneading effect, combined with the surface grid-like cutting grooves, achieves initial cutting and bubble extrusion of the waste. At the same time, the anti-slip texture of the annular conveyor belt ensures that the conveyor does not slip, and the synchronous transmission of the eccentric convex roller and the pressure roller creates gap compression, further reducing waste residue in the cutting grooves. This pretreatment stage is linked with the subsequent crushing system, providing the crushing chamber with more uniformly sized materials, thereby improving the efficiency of the crushing process. This solves the problem of the disconnect between the feeding and crushing stages in traditional equipment, and creatively realizes an integrated pretreatment process of conveying, cutting, preheating, and compression.

[0014] Based on the above technical solution, the present invention can be further improved as follows.

[0015] As a preferred technical solution of the present invention, it further includes two conveying rollers and two pressure rollers rotatably connected to the housing. Two drive motors are installed on the side of the housing. The output shaft of one drive motor is fixedly connected to one conveying roller, and the output shaft of the other drive motor is fixedly connected to one pressure roller. A feed pressure gap is fixedly provided between the annular conveyor belt and the annular pressure belt.

[0016] As a preferred embodiment of the present invention, the top of the crushing chamber is open, the top and sides of the extrusion chamber are open, the lower rotating seat is located directly below the upper rotating seat, and a material discharge channel is provided on the shell at a position corresponding to the position between the upper and lower rotating seats.

[0017] As a preferred technical solution of the present invention, a rotating shaft is installed on the lower rotating seat, the rotating shaft is rotatably connected to the housing through a bearing, a gear sleeve is rotatably installed on the rotating shaft, a lower gear ring is installed on the gear sleeve, a lower gear is installed on each extrusion shaft, the lower gear is drivenly connected to the lower gear ring, a first synchronous toothed belt and a second synchronous toothed belt are drivenly connected to the output shaft end of the servo motor, the upper rotating seat and the gear sleeve are both drivenly connected to the first synchronous toothed belt, the second synchronous toothed belt is drivenly connected to the rotating shaft, and the rotating shaft is drivenly connected to the drive frame through a third synchronous toothed belt.

[0018] As a preferred technical solution of the present invention, a square transmission section is fixedly provided on the rotating shaft, and a shaft groove with open ends is provided at the axial position of both the outer blade ring and the inner blade ring. The cross-section of the square transmission section and the shaft groove are both regular hexagonal, and a through hole is provided on both the outer blade ring and the inner blade ring corresponding to the position of each tooth plate.

[0019] As a preferred technical solution of the present invention, a microcontroller and an electric heating platform are installed on the housing. The electric heating platform is located inside the circular conveyor belt. The electrical control terminals of the electric heating arc plate and the electric heating platform are both connected to the microcontroller for data transmission. The working temperature of the electric heating platform is 80℃-100℃, and the working temperature of the electric heating arc plate is 120℃-150℃.

[0020] As a preferred embodiment of the present invention, the elastic rubber cylinder is made of rubber, and a shaping spring is integrated inside the elastic rubber cylinder.

[0021] As a preferred embodiment of the present invention, the slitting grooves on the annular conveyor belt are formed by a set of longitudinal cutters and a set of transverse cutters arranged in a cross pattern. The longitudinal cutters are equidistant along the length of the annular conveyor belt, and the transverse cutters are spaced apart along the width of the annular conveyor belt. A grid-like slitting unit is formed at the intersection of the longitudinal cutters and the transverse cutters. The cross-sections of the longitudinal cutters and the transverse cutters are both V-shaped. The included angle between the blades of the longitudinal cutters and the transverse cutters is 45°-60°. The blade height of the longitudinal cutters and the transverse cutters is 3-8mm. The surface of the annular conveyor belt is evenly covered with anti-slip textures.

[0022] As a preferred technical solution of the present invention, an eccentric convex roller is rotatably installed on the housing at a position corresponding to the inner side of the annular pressure belt. The contour surface of the eccentric convex roller is in rolling contact with the annular pressure belt. A fourth synchronous toothed belt is drivingly connected between the eccentric convex roller and one of the pressure rollers. Attached Figure Description

[0023] Figure 1 A schematic diagram of the overall structure of a waste recycling device for foam board production;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of the local structure at point A;

[0025] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure;

[0026] Figure 4 This is a schematic diagram of the cross-sectional structure of the semi-toothed ring and the rotating shaft;

[0027] Figure 5 for Figure 4 A magnified view of the structure at point B in the middle;

[0028] Figure 6 for Figure 4 A magnified schematic diagram of the local structure at point C;

[0029] Figure 7 for Figure 4 A magnified schematic diagram of the local structure at point D;

[0030] Figure 8 This is a schematic diagram of the lower rotary seat and the extrusion shaft;

[0031] Figure 9 This is a schematic diagram of the extrusion shell and the crushing blade.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1. Shell; 2. Circular conveyor belt; 3. Circular pressing belt; 4. Slitting groove; 5. Upper rotary seat; 6. Lower rotary seat; 7. Drive frame; 8. Half-tooth gear ring; 9. Drive gear ring; 10. Crushing chamber; 11. Rotary shaft; 12. Transmission screw; 13. Return torsion spring; 14. Upper gear; 15. Extrusion shell; 16. Outer blade ring; 17. Inner blade ring; 18. Elastic rubber sleeve; 19. Crushing blade; 20. Driven gear; 21. 21. Toothed plate; 22. Servo motor; 23. Spiral extrusion blade; 24. Extrusion chamber; 25. Extrusion shaft; 26. Discharge pipe; 27. Heated arc plate; 28. Conveyor roller; 29. ​​Pressure roller; 30. Rotary shaft; 31. Toothed sleeve; 32. Lower toothed ring; 33. Drive motor; 34. Square transmission section; 35. Linkage gear; 36. Heated table; 37. Longitudinal cutter; 38. Cross cutter; 39. Eccentric convex roller; 40. Lower gear. Detailed Implementation

[0034] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0035] The present invention provides the following preferred embodiments.

[0036] like Figure 1-9 As shown, a waste recycling device for foam board production includes a housing 1, and also includes a ring conveyor belt 2 and a ring pressing belt 3 that can rotate at different speeds.

[0037] It also includes two conveying rollers 28 and two pressure rollers 29 rotatably connected to the housing 1. Two drive motors 33 are installed on the side of the housing 1. The output shaft of one drive motor 33 is fixedly connected to one conveying roller 28, and the output shaft of the other drive motor 33 is fixedly connected to one pressure roller 29. A feed pressure gap is fixedly provided between the annular conveyor belt 2 and the annular pressure belt 3.

[0038] The annular pressure belt 3 has slitting grooves 4 evenly distributed on it;

[0039] The slitting groove 4 on the annular pressure belt 3 is formed by a set of longitudinal cutters 37 and a set of transverse cutters 38 arranged in a cross pattern. The longitudinal cutters 37 are equidistant along the length of the annular pressure belt 3, and the transverse cutters 38 are spaced apart along the width of the annular pressure belt 3. The intersection of the longitudinal cutters 37 and the transverse cutters 38 forms a grid-like slitting unit. The cross-sections of the longitudinal cutters 37 and the transverse cutters 38 are both V-shaped. The included angle between the blades of the longitudinal cutters 37 and the transverse cutters 38 is 50°. The blade height of the longitudinal cutters 37 and the transverse cutters 38 is 7mm. The surface of the annular conveyor belt 2 is evenly covered with anti-slip textures.

[0040] During feeding, the linear speed of the annular pressure belt 3 is 1.1 times the linear speed of the annular conveyor belt 2;

[0041] The annular pressure belt 3 rotates clockwise, while the annular conveyor belt 2 rotates counterclockwise.

[0042] A microcontroller and an electric heating table 36 are installed on the housing 1. The electric heating table 36 is located inside the annular conveyor belt 2 and the working temperature of the electric heating table 36 is 90℃.

[0043] The grid-like cutting grooves 4 on the annular pressure belt 3 perform preliminary cutting of the waste material under differential rubbing action, while the anti-slip texture on the surface of the annular conveyor belt 2 ensures that the waste material is not slipped during transport. At the same time, the preheating of the electric heating table 36 at 90°C softens the surface of the waste material, further improving the compression effect. This solves the problems of low feeding efficiency and incomplete cutting of fluffy foam waste material in traditional conveying equipment, and provides more uniform pre-treated material for subsequent crushing processes.

[0044] The speed difference between the annular pressing belt 3 and the annular conveyor belt 2 creates a kneading effect, which squeezes out the air bubbles inside the waste material and effectively compresses the foam to be recycled, providing a pretreatment basis for the spiral extrusion blades 23 of the lower rotary seat 6.

[0045] When the surface of the waste material is smooth, differential rotation compensates for friction through speed difference, ensuring continuous feeding.

[0046] The friction between the annular pressing belt 3 and the waste is greater than that between the annular conveyor belt 2 and the waste, which can generate a horizontal drag force on the waste. Combined with the slitting groove 4, it can achieve a combination of extrusion and shearing. The speed difference between the annular pressing belt 3 and the annular conveyor belt 2 pulls thick or stacked waste into the pressing groove, avoiding the interruption of conveying due to the looseness of the material. The horizontal drag force causes the waste to form longitudinal stretching in the pressing groove. Combined with vertical extrusion, it can increase the volume compression rate, which is convenient for the blade ring of the subsequent crushing system to cut fully. The relative motion generated by the differential speed increases the cutting depth of the slitting groove 4 on the waste by 1-2mm, reducing the probability of uncut waste entering the crushing chamber 10.

[0047] An eccentric cam roller 39 is rotatably mounted on the housing 1 at a position corresponding to the inner side of the annular pressure belt 3. The contour surface of the eccentric cam roller 39 is in rolling contact with the annular pressure belt 3. A fourth synchronous toothed belt is connected between the eccentric cam roller 39 and a pressure roller 29.

[0048] By using the gap extrusion structure of the eccentric cam 39, the residual rate of cutting waste in the slitting groove 4 can be effectively reduced.

[0049] An upper rotating seat 5 and a lower rotating seat 6 are rotatably mounted on the housing 1. The lower rotating seat 6 is located directly below the upper rotating seat 5. A material discharge channel is provided on the housing 1 at the position corresponding to the position between the upper rotating seat 5 and the lower rotating seat 6. A drive frame 7 is rotatably mounted on the upper rotating seat 5. Two half-tooth gear rings 8 and one active gear ring 9 are respectively mounted on the drive frame 7. A set of crushing chambers 10 is opened on the upper rotating seat 5, and the top of the crushing chambers 10 is open.

[0050] Each grinding chamber 10 is equipped with a grinding system;

[0051] The crushing system includes a rotating shaft 11, on which a linkage gear 35 meshing with a drive gear ring 9 is fixedly installed, and two symmetrically arranged transmission screws 12 are rotatably installed. Both transmission screws 12 are rotatably connected to the upper rotating seat 5, and a reset torsion spring 13 is provided at the rotatable connection between the two transmission screws 12 and the upper rotating seat 5.

[0052] The two drive screws 12 have the same pitch but opposite helical directions;

[0053] The outer surface of the transmission screw barrel 12 is provided with external threads, and the inner wall of the extrusion shell 15 is provided with internal threads. The two achieve reciprocating sliding through thread transmission.

[0054] Two upper gears 14 are installed on the two drive screws 12 and extrusion shells 15 are installed in the drive. The two upper gears 14 are respectively connected to two half-tooth rings 8. The two extrusion shells 15 are slidably connected to the crushing chamber 10. Outer blade rings 16 are rotatably installed on the two extrusion shells 15. A set of inner blade rings 17 is provided between the two outer blade rings 16. The outer blade rings 16 and the inner blade rings 17 are both driven by the rotating shaft 11.

[0055] A square transmission section 34 is fixedly installed on the rotating shaft 11. The outer blade ring 16 and the inner blade ring 17 are both provided with shaft grooves with openings at both ends at the axial positions. The cross-sections of the square transmission section 34 and the shaft grooves are both regular hexagons.

[0056] Elastic rubber sleeves 18 are connected between each pair of inner blade rings 17 and between each pair of outer blade rings 16 and the adjacent inner blade ring 17.

[0057] The elastic rubber sleeve 18 is made of rubber, and a plastic spring is integrated inside the elastic rubber sleeve 18;

[0058] Four crushing blades 19 are rotatably mounted on both the outer blade ring 16 and the inner blade ring 17. A driven gear 20 is mounted on the crushing blade 19, and four toothed plates 21 are mounted on the blade shaft. All four toothed plates 21 mesh with the driven gear 20 at the corresponding positions.

[0059] Both the outer cutter ring 16 and the inner cutter ring 17 have through holes at positions corresponding to each toothed plate 21.

[0060] When the upper rotating seat 5 rotates, the half-tooth ring 8 of the drive frame 7 periodically meshes with the upper gear 14 of the transmission screw 12. Under the reset action of the reset torsion spring 13, the extrusion shell 15 slides back and forth along the crushing chamber 10, driving the outer blade ring 16 to move synchronously, thereby causing the distance between the inner blade rings 17 and between the inner blade ring 17 and the outer blade ring 16 to change dynamically with the opening and closing of the extrusion shell 15.

[0061] This dynamic adjustment mechanism can adapt to foam waste of different volumes and fluffiness:

[0062] When large or loose waste enters, increasing the spacing can prevent jamming. After the waste is initially compressed, reducing the spacing can enhance the cutting force. Combined with the telescopic buffer of the elastic rubber cylinder 18, it can achieve a continuous action of adaptive feeding, precise gathering, and enhanced cutting.

[0063] This design effectively overcomes the shortcomings of traditional crushing equipment, such as large pieces of waste getting stuck and small pieces of waste not being cut sufficiently due to the fixed blade spacing.

[0064] Traditional equipment has a fixed blade ring spacing, which can easily lead to feeding blockage or uneven particle size when dealing with foam waste with large volume differences. This solution, however, can accommodate diverse feeding states, from loose foam fragments to compressed blocky waste, by repeatedly adjusting the spacing, thus improving the equipment's adaptability to different forms of waste.

[0065] Dynamic spacing adjustment significantly improves the cutting efficiency and uniformity of the cutter ring on waste materials;

[0066] On the one hand, increasing the spacing allows more waste material to enter the cutting area, thus increasing the feed rate;

[0067] On the other hand, when the spacing is reduced, the relative motion between the outer blade ring 16 and the inner blade ring 17 is enhanced. Combined with the revolution and rotation of the crushing blade 19, a composite effect of squeezing and gathering plus multi-directional cutting is formed, which reduces the particle size deviation of the crushed waste.

[0068] The rotating shaft 11 drives the outer blade ring 16 and the inner blade ring 17 to revolve synchronously through the regular hexagonal square transmission section 34. The blade shaft tooth plate 21 meshes with the driven gear 20 of the crushing blade 19 to achieve rotation, forming a combined effect of revolving cutting and rotating crushing. The rubber elastic sleeve 18 between the two blade rings can expand and contract with the amount of waste material, gathering the material towards the center to ensure uniform crushing. This system solves the problem of low efficiency of traditional single-blade cutting, reduces the particle size deviation of the crushed waste, and improves the crushing efficiency.

[0069] The lower rotary seat 6 has four extrusion chambers 24, with openings at the top and sides. Each extrusion chamber 24 has an extrusion shaft 25 rotatably mounted inside, and a spiral extrusion blade 23 is mounted on the extrusion shaft 25. A discharge pipe 26 is connected to the housing 1 at the position corresponding to the upper rotary seat 5. A servo motor 22 is mounted at the lower part of the housing 1. The upper rotary seat 5, lower rotary seat 6, extrusion shaft 25 and drive frame 7 are all driven by the servo motor 22. An electric heating arc plate 27 is mounted on the housing 1 at the position corresponding to the lower rotary seat 6.

[0070] The electrical control terminals of both the electric heating arc plate 27 and the electric heating table 36 are connected to the microcontroller for data transmission. The operating temperature of the electric heating arc plate 27 is 130℃.

[0071] The crushed waste is compressed a second time by the four extrusion chambers 24 of the lower rotary seat 6 and the spiral extrusion blades 23. The electric heating arc plate 27 on the shell 1 heats and softens the waste during the extrusion process at 130°C, enhancing the plasticity of the material and compacting the loose particles into blocks or strips with uniform density. The opening design at the top and sides of the extrusion chamber 24 ensures that the material can enter and exit smoothly. With the corresponding distribution of the upper rotary seat 5 and the lower rotary seat 6, a continuous process of crushing, extrusion and heating is formed. This solution solves the defect of traditional recycling equipment that only crushes without compacting, increases the compression density of the waste, and provides convenience for the subsequent melting and reuse of compressed foam.

[0072] A rotating shaft 30 is mounted on the lower rotating base 6. The rotating shaft 30 is rotatably connected to the housing 1 through a bearing. A gear sleeve 31 is rotatably mounted on the rotating shaft 30. A lower gear ring 32 is mounted on the gear sleeve 31. A lower gear 40 is mounted on each extrusion shaft 25. The lower gear 40 is drivenly connected to the lower gear ring 32. The output shaft end of the servo motor 22 is drivenly connected to a first synchronous toothed belt and a second synchronous toothed belt. The upper rotating base 5 and the gear sleeve 31 are both drivenly connected to the first synchronous toothed belt. The second synchronous toothed belt is drivenly connected to the rotating shaft 30. The rotating shaft 30 is drivenly connected to the drive frame 7 through a third synchronous toothed belt.

[0073] The first synchronous toothed belt synchronously drives the upper rotating seat 5 and the toothed sleeve 31 to ensure that the crushing and extrusion rhythms are matched. The second synchronous toothed belt drives the rotating shaft 30 to drive the lower rotating seat 6 to rotate. The third synchronous toothed belt connects the rotating shaft 30 and the drive frame 7 to ensure that the half-toothed ring 8 and the upper rotating seat 5 are in precise phase. The toothed sleeve 31 drives the extrusion shaft 25 to rotate synchronously through the lower toothed ring 32 to avoid material blockage. This design simplifies the power structure, solves the problems of complex control and high failure rate of multiple servo motors 22 in existing equipment, and improves the stability of the equipment.

[0074] The workflow and system linkage synergy of the waste recycling device for foam board production of the present invention are as follows: In the feeding stage, in the feeding conveying system, two drive motors 33 drive the annular conveyor belt 2 and the annular pressure belt 3 to rotate at different speeds. The feeding pressure seam is combined with the grid-like slitting groove 4 composed of V-shaped longitudinal cutters 37 and transverse cutters 38 on the annular pressure belt 3. Under the differential rubbing effect, the foam waste is initially cut. At the same time, the electric heating table 36 on the inner side of the shell 1 preheats and softens the surface of the waste at 90°C. The anti-slip texture on the surface of the annular conveyor belt 2 ensures that the conveying does not slip. The eccentric convex roller 39 on the shell 1 achieves gap squeezing through the fourth synchronous toothed belt drive with the pressure roller 29, reducing the waste residue in the slitting groove 4.

[0075] The pre-treated material is conveyed to the next stage through the feed crimping joint;

[0076] After the material enters the crushing system, the servo motor 22 drives the upper rotating seat 5 to rotate through the first synchronous toothed belt, while the third synchronous toothed belt drives the drive frame 7 to rotate. The two half-toothed rings 8 on the drive frame 7 periodically mesh with the upper gear 14 on the transmission screw 12. Under the reset action of the reset torsion spring 13, the two transmission screws 12 drive the extrusion shell 15 to slide back and forth along the crushing chamber 10, so that the distance between the outer blade ring 16 and the inner blade ring 17 changes dynamically. The rotating shaft 11 drives the outer blade ring 16 and the inner blade ring 17 to revolve through the regular hexagonal square transmission section 34. The toothed plate 21 on the blade shaft meshes with the passive gear 20 of the crushing blade 19 to achieve rotation. Combined with the extension and retraction of the elastic rubber cylinder 18, a composite effect of revolution cutting and rotation crushing is formed to complete the crushing of the material.

[0077] The crushed material enters the extrusion chamber 24 of the lower rotary seat 6 through the feeding channel. The servo motor 22 drives the rotating shaft 30 to rotate the lower rotary seat 6 through the second synchronous toothed belt. At the same time, the toothed sleeve 31 drives the spiral extrusion blade 23 on the extrusion shaft 25 to rotate through the lower toothed ring 32, which performs secondary compression on the material. The electric heating arc plate 27 on the shell 1 heats and softens the material at 130°C under the control of the microcontroller, enhancing its plasticity. Finally, the compacted material is discharged from the discharge pipe 26. Throughout the process, the first synchronous toothed belt, the second synchronous toothed belt, and the third synchronous toothed belt ensure the coordinated operation of the upper rotary seat 5, the lower rotary seat 6, the drive frame 7, and the extrusion shaft 25, achieving rhythm matching of each link.

[0078] The coordination between the reciprocating sliding of the extrusion shell 15 and the dynamic adjustment of the blade ring spacing in the crushing system is crucial and relevant.

[0079] If the blade ring spacing is fixed, feeding blockage or uneven particle size may occur when dealing with foam waste with large volume differences. However, the periodic meshing of the semi-tooth ring 8 and the upper gear 14 drives the transmission screw 12 to rotate, and the reciprocating sliding of the extrusion shell 15 is achieved through the reset torsion spring 13. This is directly related to the change in the spacing between the outer blade ring 16 and the inner blade ring 17. At the same time, with the rotation of the blade ring driven by the rotating shaft 11 and the gathering effect of the elastic rubber cylinder 18, it can adapt to waste with different fluffiness and solve the defects of traditional fixed blade spacing equipment.

[0080] This device solves the practical technical problems of low feeding efficiency, uneven crushing, and loose material after crushing in the recycling of foam waste by the coordinated operation of multiple systems, including differential cutting and preheating of the feeding system, dynamic spacing adjustment of the crushing system, and heating and compression of the extrusion system. It achieves efficient and continuous recycling from pretreatment to compaction.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste recycling device for foam board production, comprising a shell (1), characterized in that, It also includes a ring conveyor belt (2) and a ring pressure belt (3) that can rotate at different speeds. The ring pressure belt (3) is evenly distributed with slitting grooves (4). An upper rotating seat (5) and a lower rotating seat (6) are rotatably mounted on the housing (1). A drive frame (7) is rotatably mounted on the upper rotating seat (5). Two half-tooth gear rings (8) and one active gear ring (9) are mounted on the drive frame (7). A set of crushing chambers (10) is opened on the upper rotating seat (5). Each crushing chamber (10) is equipped with a crushing system. The crushing system includes a rotating shaft (11), on which a linkage gear (35) meshes with a drive gear ring (9) is fixedly mounted, and two symmetrically arranged transmission screws (12) are rotatably mounted. Both transmission screws (12) are rotatably connected to an upper rotating seat (5). A return torsion spring (13) is provided at the rotatable connection between the two transmission screws (12) and the upper rotating seat (5). Both transmission screws (12) are equipped with upper gears (14) and extrusion shells (15) are driven and mounted. The two upper gears (14) are respectively driven and connected to two half-tooth gear rings (8). Both extrusion shells (15) are slidably connected to the crushing chamber (10). An outer blade ring (16) is rotatably mounted on the extrusion shell (15). An inner blade ring (17) is set between the two outer blade rings (16). The outer blade rings (16) and the inner blade rings (17) are driven by a rotating shaft (11). An elastic rubber sleeve (18) is connected between the two inner blade rings (17) and between the two outer blade rings (16) and the adjacent inner blade rings (17). Four crushing blades (19) are rotatably mounted on the outer blade rings (16) and the inner blade rings (17). A driven gear (20) is mounted on the crushing blades (19). Four toothed plates (21) are mounted on the blade shaft. The four toothed plates (21) mesh with the driven gears (20) at the corresponding positions. The lower rotary seat (6) has four extrusion chambers (24), each of which is rotatably equipped with an extrusion shaft (25). The extrusion shaft (25) is equipped with a spiral extrusion blade (23). A discharge pipe (26) is connected to the housing (1) at the position corresponding to the upper rotary seat (5). A servo motor (22) is installed at the lower part of the housing (1). The upper rotary seat (5), lower rotary seat (6), extrusion shaft (25) and drive frame (7) are all driven by the servo motor (22). An electric heating arc plate (27) is installed on the housing (1) at the position corresponding to the lower rotary seat (6).

2. The waste recycling device for foam board production according to claim 1, characterized in that, It also includes two conveying rollers (28) and two pressure rollers (29) rotatably connected to the housing (1). Two drive motors (33) are installed on the side of the housing (1). The output shaft end of one drive motor (33) is fixedly connected to one conveying roller (28), and the output shaft end of the other drive motor (33) is fixedly connected to one pressure roller (29). A feed pressure gap is fixedly provided between the annular conveyor belt (2) and the annular pressure belt (3).

3. The waste recycling device for foam board production according to claim 1, characterized in that, The crushing chamber (10) has an opening at the top, and the extrusion chamber (24) has openings at the top and sides. The lower rotating seat (6) is located directly below the upper rotating seat (5). A material discharge channel is provided on the housing (1) at the position corresponding to the position between the upper rotating seat (5) and the lower rotating seat (6).

4. The waste recycling device for foam board production according to claim 1, characterized in that, A rotating shaft (30) is installed on the lower rotating seat (6). The rotating shaft (30) is rotatably connected to the housing (1) through a bearing. A gear sleeve (31) is rotatably installed on the rotating shaft (30). A lower gear ring (32) is installed on the gear sleeve (31). A lower gear (40) is installed on each extrusion shaft (25). The lower gear (40) is connected to the lower gear ring (32) in a transmission connection. The output shaft end of the servo motor (22) is connected to a first synchronous toothed belt and a second synchronous toothed belt in a transmission connection. The upper rotating seat (5) and the gear sleeve (31) are both connected to the first synchronous toothed belt in a transmission connection. The second synchronous toothed belt is connected to the rotating shaft (30) in a transmission connection. The rotating shaft (30) is connected to the drive frame (7) in a transmission connection through a third synchronous toothed belt.

5. A waste recycling device for foam board production according to claim 1, characterized in that, A square transmission section (34) is fixedly provided on the rotating shaft (11). The outer blade ring (16) and the inner blade ring (17) are both provided with shaft grooves with open ends at the axial positions. The cross-section of the square transmission section (34) and the shaft groove is a regular hexagon. The outer blade ring (16) and the inner blade ring (17) are provided with through holes corresponding to the position of each tooth plate (21).

6. The waste recycling device for foam board production according to claim 1, characterized in that, The housing (1) is equipped with a microcontroller and an electric heating table (36). The electric heating table (36) is located inside the circular conveyor belt (2). The electric control terminals of the electric heating arc plate (27) and the electric heating table (36) are connected to the microcontroller. The working temperature of the electric heating table (36) is 80℃-100℃, and the working temperature of the electric heating arc plate (27) is 120℃-150℃.

7. A waste recycling device for foam board production according to claim 1, characterized in that, The elastic rubber cylinder (18) is made of rubber, and a plastic spring is integrated inside the elastic rubber cylinder (18). The linear speed of the annular pressure belt (3) is 1.05-1.2 times that of the linear speed of the annular conveyor belt (2).

8. The waste recycling device for foam board production according to claim 1, characterized in that, The slitting groove (4) on the annular pressure belt (3) is formed by a set of longitudinal cutters (37) and a set of transverse cutters (38) arranged in a cross pattern. The longitudinal cutters (37) are equidistant along the length direction of the annular pressure belt (3), and the transverse cutters (38) are distributed at intervals along the width direction of the annular pressure belt (3).

9. A waste recycling device for foam board production according to claim 8, characterized in that, The intersection of the longitudinal cutter (37) and the transverse cutter (38) forms a grid-like cutting unit. The cross-sections of the longitudinal cutter (37) and the transverse cutter (38) are both V-shaped. The included angle between the blades of the longitudinal cutter (37) and the transverse cutter (38) is 45°-60°. The blade height of the longitudinal cutter (37) and the transverse cutter (38) is 3-8mm. The surface of the annular conveyor belt (2) is evenly covered with anti-slip textures.

10. A waste recycling device for foam board production according to claim 2, characterized in that, An eccentric cam (39) is rotatably mounted on the housing (1) at a position corresponding to the inner side of the annular pressure belt (3). The contour surface of the eccentric cam (39) is in rolling contact with the annular pressure belt (3). A fourth synchronous toothed belt is connected between the eccentric cam (39) and a pressure roller (29).

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