A polyurethane foam scrap recycling and crushing device and its crushing method

Abstract

This invention relates to the field of polyurethane foam scrap recycling and crushing technology, and provides a polyurethane foam scrap recycling and crushing device and its crushing method, including a workbench and a crushing component installed on the top of the workbench. The crushing component includes a conveying box and a crushing box, which are connected. A crushing roller rotates inside the crushing box. This device solves the problem that due to the different shapes of the scraps and the narrow carrying environment, the material remains inside the ton bag after the bag is broken because of its own shape and the mutual influence of adjacent scraps, which affects the production efficiency. The device uses a cylinder to squeeze and a rotating cylinder to drive the packaging bag to rotate, thereby adjusting the position of the scraps. This achieves the effects of eliminating the mutual jamming of materials caused by irregular shapes and narrow carrying environments, reducing material residue in the ton bag and avoiding raw material waste, saving the extra cost of manual cleaning, and improving the processing efficiency of polyurethane foam scraps.

Description

Technical Field

[0001] This invention relates to the field of polyurethane foam scrap recycling and crushing technology, and more specifically, to a polyurethane foam scrap recycling and crushing device and its crushing method. Background Technology

[0002] Polyurethane, a core insulation material in refrigerator manufacturing, is filled between the refrigerator body and door through on-site foaming to form an insulation layer. Overflow, cutting waste, and aged foam from dismantled refrigerators constitute polyurethane foam scraps. These scraps are mostly closed-cell rigid foams, which, while possessing properties such as low-temperature resistance, face recycling challenges due to their susceptibility to impurities and difficulty in natural degradation. Currently, the industry is promoting resource utilization and reducing environmental pollution through methods such as physical crushing for reuse in cushioning materials and chemical decomposition and reduction into raw materials.

[0003] Currently, polyurethane foam scraps need to be recycled in ton bags and then crushed using a crushing device. Traditional methods for crushing bagged scraps involve a step-by-step process. First, a hoisting device lifts the ton bags containing the scraps to a crushing station. A mechanical crushing device breaks down the bag structure, releasing the scraps. The released scraps then fall directly into a crusher below for further crushing.

[0004] Although this process can achieve preliminary crushing of materials, in actual application, scraps are of various shapes and the carrying environment is narrow. Even after the bag is broken, the shape of the scraps and the mutual influence of adjacent scraps will cause a large amount of material to remain inside the ton bag. This not only wastes raw materials, but also requires additional labor costs for cleaning, which seriously affects production efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a polyurethane foam scrap recycling and crushing device and its crushing method.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a polyurethane foam scrap recycling and crushing device, comprising a workbench and a crushing component installed on the top of the workbench, the crushing component comprising a conveying box and a crushing box, the conveying box and the crushing box being connected, and a crushing roller rotating inside the crushing box.

[0007] The crushing box is equipped with an adjustment assembly and a bag-breaking assembly. A hoisting assembly is installed on the top of the crushing box. The hoisting assembly includes a column and a boom set on the outer wall of the column. A transfer trolley slides on the bottom of the boom. A winding mechanism is installed on the bottom of the transfer trolley. A connecting plate is connected to the bottom of the winding mechanism. A bearing plate is set on the bottom of the connecting plate. Adjustment mechanisms are set at the four corners of the bearing plate.

[0008] A packaging bag is disposed below the support plate, and the output end of the adjustment mechanism is connected to the four corner side walls of the packaging bag.

[0009] The invention is further configured such that: the crushing assembly also includes a first drive motor installed on one side of the workbench, the output end of the first drive motor is connected to the outer wall of the crushing roller through a belt transmission mechanism, a second drive motor and a reducer are installed on one side of the workbench, the output end of the second drive motor is connected to the input end of the reducer through a belt transmission mechanism, the output end of the reducer extends into the interior of the crushing box and is connected to a rotating shaft, the rotating shaft extends into the interior of the conveying box and is connected to a spiral blade on the outer wall.

[0010] By adopting the above technical solution, when polyurethane foam scraps are placed inside the crushing box, the rotating crushing roller crushes the polyurethane foam scraps. The crushed polyurethane foam scraps fall to the bottom of the crushing box and accumulate. The rotating shaft drives the spiral blades to rotate, causing the crushed polyurethane foam scraps accumulated inside the crushing box to be conveyed by the spiral. The crushed polyurethane foam scraps are then sent to the inside of the conveying box. The bottom of the conveying box is provided with an opening, through which the crushed polyurethane foam scraps are discharged after being conveyed into the inside of the conveying box.

[0011] The invention is further configured such that: a rotary cylinder is installed on the top of the connecting plate, the output end of the rotary cylinder passes downward through the connecting plate and is connected to the top of the bearing plate, connecting rods are connected to both sides of the bearing plate, the connecting rods pass through the lifting strap at the top of the packaging bag, and a through groove is provided on the top of the crushing box, the through groove being configured to cooperate with the winding mechanism and the transfer trolley.

[0012] The present invention is further configured such that: each of the four sets of adjustment mechanisms includes a bracket installed on the top of the support plate, an electric reel is rotatably connected inside the bracket, a hanging rope is wound around the outer wall of the electric reel, one end of the hanging rope extends downward to the side wall of the packaging bag and is connected to a connecting block, and a plurality of insert rods are connected to one side of the connecting block.

[0013] The present invention is further configured such that: the outer wall of the insertion rod is connected with barbs, and one end of the barbs is inclined toward the connecting block.

[0014] By adopting the above technical solution, the tension of the lifting rope is dynamically adjusted by four sets of electric reels as the packaging bag rotates. During the rotation of the packaging bag, the swaying amplitude of the packaging bag can be stabilized. When the bottom of the packaging bag breaks, the four sets of electric reels simultaneously wind up the lifting rope. Through the cooperation of barbs and inserts, the four corners of the packaging bag are pulled upward to form a uniform pulling force, which opens the bag opening and promotes the material to fall smoothly under the dual action of gravity and tension.

[0015] The present invention is further configured such that: the adjustment component is located above the bag breaking component, and the adjustment component includes two fixed rods symmetrically connected to the top wall inside the crushing box, and the outer walls of the two fixed rods are rotatably connected to hinge plates. Adjustment cylinders are hinged to both sides of the crushing box, and the two adjustment cylinders are correspondingly arranged with the two hinge plates. The piston rod end of the adjustment cylinder is hinged to the side wall of the corresponding hinge plate.

[0016] By adopting the above technical solution, after the packaging bag is transferred into the crushing box, the packaging bag is squeezed multiple times by adjusting the hinge plate driven by the cylinder, and the packaging bag is rotated as a whole by the rotating cylinder to change the angle. This allows the polyurethane foam scraps with different shapes inside to continuously adjust their positions during the squeezing and rotation, which solves the problem of mutual jamming caused by the irregular shape of the material and the narrow bearing environment. It reduces the material residue in the ton bag, avoids the waste of raw materials, saves the extra cost of manual cleaning, and improves the efficiency of the polyurethane foam scrap processing process.

[0017] The present invention is further configured such that: the bag breaking assembly includes a frame installed inside the crushing box and second corner plates connected to the lower corners of the four corners of the inner side wall of the frame, a fixing seat is connected to the side wall of each second corner plate, and a V-shaped cutter is provided below the fixing seat, and the four V-shaped cutters are arranged opposite each other.

[0018] The present invention is further configured such that: each of the fixed seats is equipped with an electric slide rail inside, a slider is slidably connected to the bottom of the electric slide rail, the V-shaped cutter is installed on the side wall of the corresponding slider, a guide rod is horizontally connected inside the fixed seat, and the slider is slidably connected to the outer side wall of the corresponding guide rod.

[0019] The invention is further configured such that: a first corner plate is installed above the four corners of the inner side wall of the frame; a telescopic cylinder is installed vertically downward on the top of the first corner plate; the piston rod of the telescopic cylinder passes through the corresponding first corner plate and is connected to a V-shaped cover plate; a V-shaped block is connected to the top of each fixed seat; the V-shaped cover plate and the V-shaped block are adapted to each other; an inclined portion is opened on the side of the V-shaped cover plate and the V-shaped block facing the corresponding V-shaped cutter; and the inclination angle of the V-shaped cutter is adapted to the inclination angle of the inclined portion.

[0020] By adopting the above technical solution, the arrangement of the V-shaped cutters is changed, reducing the structural volume supporting the V-shaped cutters. The four V-shaped cutters cooperate with the corresponding fixed seats to form a cross structure inside the frame, expanding the diameter of the polyurethane foam scraps falling through. After the V-shaped cutters complete the bag breaking, the electric slide rail drives the slider and the corresponding V-shaped cutter to move, thereby shrinking the V-shaped cutters and further reducing the volume of the cross structure, further increasing the diameter of the material falling through the frame. At the same time, the V-shaped cutters continue to increase the size of the bag breaking at the bottom of the packaging bag during the movement, facilitating the falling of large pieces of polyurethane foam scraps.

[0021] If large pieces of polyurethane foam scrap fall onto the bag-breaking component and are blocked, the V-shaped cutter is moved multiple times. The V-shaped cutter, together with the V-shaped block and V-shaped cover plate, cuts and crushes the large pieces of polyurethane foam scrap. Then, the telescopic cylinder pushes the V-shaped cover plate down, and the V-shaped cover plate and V-shaped block work together to crush the large pieces of polyurethane foam scrap again, thus preventing the polyurethane foam scrap from being blocked.

[0022] A method for recycling and crushing polyurethane foam scraps, using a polyurethane foam scrap recycling and crushing device as described above, includes the following steps:

[0023] S1. Use a lifting assembly to lift the packaging bag filled with polyurethane foam scraps and transfer the packaging bag into the crushing box.

[0024] S2. After the movement is completed, the packaging bag is clamped once using the adjustment component. Then, the lifting component drives the adjustment component to rotate at a preset angle. The packaging bag is then clamped a second time using the adjustment component. This process is repeated to squeeze and adjust the position of the polyurethane foam scraps inside the packaging bag, reducing the probability of the polyurethane foam scraps getting stuck. At the same time, the lifting component is used to adjust the swaying of the packaging bag.

[0025] S3. After the packaging bag is squeezed, the lifting component releases the packaging bag, causing the packaging bag to fall rapidly and collide with the bag breaking component, causing the bottom of the packaging bag to be broken open. The polyurethane foam scraps inside the packaging bag are released and fall above the crushing roller, and then the crushing roller rotates to crush the polyurethane foam scraps.

[0026] S4. After the polyurethane foam scraps are crushed, they are conveyed to the bottom of the conveyor box for discharge.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] (1) By setting a hinge plate, after the packaging bag is transferred into the crushing box, the hinge plate is driven by the cylinder to squeeze the packaging bag multiple times, and the rotating cylinder is used to drive the packaging bag to rotate as a whole to change the angle, so that the polyurethane foam scraps with different shapes inside are constantly adjusted in position during the squeezing and rotation. This solves the problem of mutual jamming caused by the irregular shape of the material and the narrow bearing environment, reduces the material residue in the ton bag, avoids the waste of raw materials, saves the extra cost of manual cleaning, and improves the efficiency of the polyurethane foam scrap processing process.

[0029] (2) The tension of the hanging rope is dynamically adjusted by four sets of electric reels when the packaging bag rotates. During the rotation of the packaging bag, the swaying amplitude of the packaging bag can be stabilized. When the bottom of the packaging bag breaks, the four sets of electric reels simultaneously wind up the hanging rope. The barbs and insert rods work together to pull the four corners of the packaging bag upward, forming a uniform pulling force, opening the bag mouth and causing the material to fall smoothly under the dual action of gravity and tension.

[0030] (3) By changing the arrangement of the V-shaped cutters, the structural volume supporting the V-shaped cutters is reduced. The four V-shaped cutters cooperate with the corresponding fixed seats to form a cross structure inside the frame, which expands the diameter of the polyurethane foam scraps falling. After the V-shaped cutters complete the bag breaking, the electric slide rail drives the slider and the corresponding V-shaped cutter to move, thereby shrinking the V-shaped cutters, which further reduces the volume of the cross structure and further increases the diameter of the material falling inside the frame. At the same time, the V-shaped cutters continue to increase the size of the bag breaking at the bottom of the packaging bag during the movement, which facilitates the falling of large pieces of polyurethane foam scraps.

[0031] (4) If large pieces of polyurethane foam scraps fall onto the bag-breaking component and are still blocked, the V-shaped cutter is moved multiple times. The V-shaped cutter, together with the V-shaped block and the V-shaped cover plate, cuts and crushes the large pieces of polyurethane foam scraps. Then, the telescopic cylinder is used to push the V-shaped cover plate down. The V-shaped cover plate and the V-shaped block work together to crush the large pieces of polyurethane foam scraps again, thus avoiding the situation where the polyurethane foam scraps are blocked. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of a polyurethane foam scrap recycling and crushing device according to the present invention.

[0033] Figure 2 This is a partial structural diagram of the crushing component in this invention.

[0034] Figure 3 This is a schematic diagram of the combined structure of the crushing box and the hoisting assembly in this invention.

[0035] Figure 4 for Figure 3 A schematic diagram of a local part of the structure.

[0036] Figure 5 This is a schematic diagram of the connection structure between the connecting block and the insertion rod in this invention.

[0037] Figure 6 This is a schematic diagram of the combined structure of the crushing box, the adjusting component, and the bag-breaking component in this invention.

[0038] Figure 7 This is a schematic diagram of the bag-breaking component structure in this invention.

[0039] Figure 8 for Figure 7 A schematic diagram of a local part of the structure.

[0040] Figure 9 This is a schematic diagram of the V-shaped cover plate, V-shaped block and V-shaped cutter in this invention.

[0041] Explanation of reference numerals in the attached diagram: 1. Workbench;

[0042] 2. Crushing assembly; 21. Conveyor box; 22. Crushing box; 23. Rotating shaft; 24. First drive motor; 25. Second drive motor; 26. Reducer; 27. Spiral blades; 28. Crushing roller;

[0043] 3. Lifting components; 31. Column; 32. Boom; 33. Transfer trolley; 34. Winding mechanism; 35. Connecting plate; 36. Bearing plate;

[0044] 37. Adjustment mechanism; 371. Support; 372. Electric reel; 373. Lifting rope; 374. Connecting block; 375. Insert rod; 376. Barb;

[0045] 38. Rotary cylinder; 39. Connecting rod; 301. Through groove;

[0046] 4. Adjustment components; 41. Fixing rod; 42. Hinge plate; 43. Adjustment cylinder;

[0047] 5. Bag breaking assembly; 51. Frame; 52. First corner plate; 53. Second corner plate; 54. Telescopic cylinder; 55. V-shaped cover plate; 56. Fixing base; 57. V-shaped block; 58. Electric slide rail; 59. Guide rod; 501. Sliding block; 502. V-shaped cutter; 503. Inclined part;

[0048] 6. Packaging bags. Detailed Implementation

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0051] Please see Figures 1-9 The present invention provides the following technical solutions:

[0052] Example 1, see Figure 1 A polyurethane foam scrap recycling and crushing device includes a workbench 1 and a crushing component 2 installed on the top of the workbench 1. The crushing component 2 is used to crush the polyurethane foam scrap, and the specific structure of the crushing component 2 is as follows:

[0053] See Figure 2 and Figure 3 The crushing component 2 includes a conveyor box 21 and a crushing box 22, which are connected. Both the conveyor box 21 and the crushing box 22 are installed on the top of the workbench 1. The polyurethane foam scraps are first crushed inside the crushing box 22. The crushed polyurethane foam scraps are discharged through the conveyor box 21. Inside the crushing box 22, there is a crushing roller 28 that rotates. When the polyurethane foam scraps are placed inside the crushing box 22, the crushing roller 28 is used to crush the polyurethane foam scraps.

[0054] See Figure 1 and Figure 2 The crushing assembly 2 also includes a first drive motor 24 installed on one side of the workbench 1. The output end of the first drive motor 24 is connected to the outer wall of the crushing roller 28 through a belt drive mechanism. This belt drive mechanism is composed of a synchronous belt and two pulleys. That is, pulleys are installed on both the first drive motor 24 and the crushing roller 28. The two pulleys are driven by the synchronous belt. When the first drive motor 24 starts, the synchronous belt and pulleys work together to apply rotational driving force to the crushing roller 28. When the polyurethane foam scrap is placed inside the crushing box 22, the rotating crushing roller 28 crushes the polyurethane foam scrap. The crushed polyurethane foam scrap falls to the bottom of the crushing box 22 and accumulates.

[0055] See Figure 1 and Figure 2A second drive motor 25 and a reducer 26 are installed on one side of the workbench 1. The output end of the second drive motor 25 is connected to the input end of the reducer 26 through a belt drive mechanism. This belt drive mechanism is composed of a synchronous belt and two pulleys. That is, pulleys are installed on both the second drive motor 25 and the reducer 26, and the two pulleys are driven by the synchronous belt. When the second drive motor 25 starts, the belt drive mechanism applies driving force to the reducer 26. The output end of the reducer 26 extends into the interior of the crushing box 22 and is connected to a rotating shaft 23. The rotating shaft 23 extends into the interior of the conveying box 21 and is connected to a spiral blade 27 on its outer wall. The reducer 26 applies driving force to the rotating shaft 23, and the rotating shaft 23 drives the spiral blade 27 to rotate, causing the crushed polyurethane foam scraps accumulated inside the crushing box 22 to be conveyed by a spiral conveyor. The crushed polyurethane foam scraps are sent to the interior of the conveying box 21. The bottom of the conveying box 21 is provided with an opening. After the crushed polyurethane foam scraps are conveyed into the interior of the conveying box 21, they can be discharged through this opening.

[0056] See Figure 1 and Figure 3 A lifting assembly 3 is installed on the top of the crushing box 22. A packaging bag 6 is placed below the lifting assembly 3. The packaging bag 6 is used to fill polyurethane foam scraps. Then, the lifting assembly 3 is used to transfer the packaging bag 6 to the top of the crushing box 22 to facilitate unloading. The specific structure of the lifting assembly 3 is as follows:

[0057] The lifting assembly 3 includes a column 31 and a boom 32 disposed on the outer wall of the column 31. A transfer trolley 33 slides on the bottom of the boom 32. The column 31 supports the boom 32, keeping it horizontal. The transfer trolley 33 travels on the bottom of the boom 32. A winding mechanism 34 is installed on the bottom of the transfer trolley 33. A connecting plate 35 is connected to the bottom of the winding mechanism 34. A bearing plate 36 is disposed on the bottom of the connecting plate 35. The packaging bag 6 is disposed below the bearing plate 36. During the movement of the transfer trolley 33, the winding mechanism 34, the connecting plate 35, and the bearing plate 36 move. A lifting chain is wound on the winding mechanism 34. The winding mechanism 34 is used to wind and release the lifting chain. The lifting chain is connected to the connecting plate 35. When the lifting chain is released, the connecting plate 35 and the bearing plate 36 descend. Conversely, when the lifting chain is wound, the connecting plate 35 and the bearing plate 36 are lifted.

[0058] See Figure 3 and Figure 4Both sides of the bearing plate 36 are connected to connecting rods 39. When the packaging bag 6 is hoisted, the hoisting chain is first released through the winding mechanism 34, causing the connecting plate 35 and the bearing plate 36 to move down, causing the bearing plate 36 to descend to the ground position. The two connecting rods 39 pass through the lifting straps at the top of the packaging bag 6, and the hoisting chain on the winding mechanism 34 is wound up, causing the packaging bag 6 to be hoisted. Then, the transfer trolley 33 moves on the crane arm 32, causing the packaging bag 6 to be moved into the crushing box 22, which facilitates the subsequent crushing operation.

[0059] To avoid interference, a through groove 301 is provided on the top of the crushing box 22. The through groove 301 is configured to cooperate with the winding mechanism 34 and the transfer trolley 33. When the transfer trolley 33 and the winding mechanism 34 move, the through groove 301 is used to avoid the transfer trolley 33 and the winding mechanism 34, so that the transfer trolley 33, the winding mechanism 34 and the packaging bag 6 can smoothly enter the crushing box 22.

[0060] See Figure 6 The crushing chamber 22 is equipped with a bag-breaking component 5, which is used to break the bottom of the packaging bag 6, thereby releasing the polyurethane foam scraps filled inside the packaging bag 6 into the crushing chamber 22. The specific structure of the bag-breaking component 5 is as follows:

[0061] See Figures 6-8 The bag-breaking assembly 5 includes a frame 51 installed inside the crushing box 22 and second corner plates 53 connected to the lower corners of the inner side wall of the frame 51. Each second corner plate 53 has a fixed seat 56 connected to its side wall. A V-shaped cutter 502 is provided below the fixed seat 56. The four V-shaped cutters 502 are arranged opposite each other and cooperate to form a bag-breaking cutter group. When the packaging bag 6 is transferred into the crushing box 22, the winding mechanism 34 quickly releases the lifting chain, and the packaging bag 6 quickly descends and collides with the four V-shaped cutters 502, thereby tearing the bottom of the packaging bag 6. The polyurethane foam scraps inside the packaging bag 6 are released into the crushing box 22 for crushing. The crushed polyurethane foam scraps can be discharged through the opening at the bottom of the conveyor box 21.

[0062] In Example 2, due to the various shapes of polyurethane foam scraps and the narrow carrying environment, even after the bag is broken, the shape of the scraps themselves and the interaction of adjacent scraps will cause a large amount of material to remain inside the ton bag. This not only wastes raw materials but also requires additional manual cleaning costs, which seriously affects production efficiency.

[0063] For this purpose, please refer to Figure 6An adjustment component 4 is installed inside the crushing chamber 22. The adjustment component 4 is used to squeeze the packaging bag 6 entering the crushing chamber 22. The polyurethane foam scraps inside the packaging bag 6 are squeezed and adjusted to reduce the probability of the polyurethane foam scraps getting stuck. The specific structure of the adjustment component 4 is as follows:

[0064] See Figure 6 The adjustment component 4 is located above the bag breaking component 5, and the adjustment component 4 includes two fixed rods 41 symmetrically connected to the top wall inside the crushing box 22. The outer walls of the two fixed rods 41 are rotatably connected to hinge plates 42. Adjustment cylinders 43 are hinged on both sides of the crushing box 22. The two adjustment cylinders 43 are correspondingly arranged with the two hinge plates 42. The piston rod end of the adjustment cylinder 43 is hinged to the side wall of the corresponding hinge plate 42.

[0065] After the packaging bag 6 is transferred into the crushing box 22, two adjusting cylinders 43 push the corresponding hinge plate 42 to swing inside the crushing box 22 and squeeze the packaging bag 6 once. Then, the rotating cylinder 38 drives the bearing plate 36, connecting rod 39 and four sets of adjusting mechanisms 37 to rotate as a whole, causing the packaging bag 6 to rotate at a preset angle. Then, the hinge plate 42 is controlled to swing inside the crushing box 22 again, so that the hinge plate 42 clamps the packaging bag 6 a second time. This process is repeated, so that the polyurethane foam scraps inside the packaging bag 6 are squeezed and adjusted in position, reducing the probability of the polyurethane foam scraps getting stuck.

[0066] Additionally, see Figure 4 A rotary cylinder 38 is installed on the top of the connecting plate 35. The output end of the rotary cylinder 38 passes downward through the connecting plate 35 and connects to the top of the support plate 36. Adjustment mechanisms 37 are provided at the four corners of the support plate 36, and the output ends of the adjustment mechanisms 37 are connected to the four corner side walls of the packaging bag 6. The rotary cylinder 38 is used to drive the support plate 36 to rotate, thereby causing the support plate 36 and the connecting rod 39 to rotate and drive the packaging bag 6 to rotate, thereby adjusting the orientation of the side walls of the packaging bag 6, so as to facilitate the multi-directional compression of the side walls of the packaging bag 6 by the hinge plate 42.

[0067] See Figure 4 and Figure 5Each of the four adjustment mechanisms 37 includes a bracket 371 mounted on the top of the support plate 36. An electric reel 372 is rotatably connected inside the bracket 371. A suspension rope 373 is wound around the outer wall of the electric reel 372. One end of the suspension rope 373 extends downward to the side wall of the packaging bag 6 and is connected to a connecting block 374. Multiple insert rods 375 are connected to one side of the connecting block 374. A barb 376 is connected to the outer wall of the insert rod 375. One end of the barb 376 is inclined toward the connecting block 374. During the rotation of the packaging bag 6, the four electric reels 372 release or rewind the corresponding suspension ropes 373, thereby adjusting the tension of the four suspension ropes 373 and adjusting the swaying of the packaging bag 6.

[0068] Furthermore, when the bottom of the packaging bag 6 is broken, the four sets of electric reels 372 simultaneously wind up the corresponding lifting ropes 373. The lifting ropes 373 pull the connecting block 374 and the insert rod 375 upward. Since the insert rod 375 is fixed to the packaging bag 6 by the barbs 376, when the insert rod 375 and the connecting block 374 are pulled upward, the four corners of the packaging bag 6 are pulled upward at the same time, which facilitates the polyurethane foam scraps to fall from the inside of the packaging bag 6.

[0069] In Example 3, although the position of the polyurethane foam scraps inside the packaging bag 6 and the opening at the bottom of the packaging bag 6 are adjusted to achieve the purpose of material discharge, the adjustment component 4 can only squeeze the polyurethane foam scraps on the outer ring of the packaging bag 6. The volume of the polyurethane foam scraps inside the packaging bag 6 is still large. When large pieces of polyurethane foam scraps fall, due to the bag breaking component 5 set at the inlet, large pieces of polyurethane foam scraps are easy to accumulate at the location of the bag breaking component 5 and cannot be discharged. It is still necessary for the staff to manually adjust and pound them.

[0070] Therefore, an electric slide rail 58 is installed inside each fixed seat 56, and a slider 501 is slidably connected to the bottom of the electric slide rail 58. A V-shaped cutter 502 is installed on the side wall of the corresponding slider 501. A guide rod 59 is horizontally connected inside the fixed seat 56, and the slider 501 is slidably connected to the outer side wall of the corresponding guide rod 59.

[0071] First, by changing the arrangement of the V-shaped cutters 502, the structural volume supporting the V-shaped cutters 502 is reduced. The four V-shaped cutters 502 cooperate with the corresponding fixed seats 56 to form a cross structure inside the frame 51, which expands the diameter of the polyurethane foam scrap falling. After the V-shaped cutters 502 complete the bag breaking, the electric slide rail 58 drives the slider 501 and the corresponding V-shaped cutter 502 to move, thereby shrinking the V-shaped cutters 502, further reducing the volume of the cross structure, and further increasing the diameter of the material falling inside the frame 51.

[0072] Meanwhile, the V-shaped cutter 502 continues to increase the size of the tear at the bottom of the packaging bag 6 during its movement, making it easier for large pieces of polyurethane foam scraps to fall off.

[0073] See Figures 6-9 A first corner plate 52 is installed above the four corners of the inner side wall of the frame 51. A telescopic cylinder 54 is installed vertically downward on the top of the first corner plate 52. The piston rod of the telescopic cylinder 54 passes through the corresponding first corner plate 52 and is connected to a V-shaped cover plate 55. A V-shaped block 57 is connected to the top of each fixed seat 56. The V-shaped cover plate 55 and the V-shaped block 57 are adapted to each other. An inclined part 503 is opened on the side of the V-shaped cover plate 55 and the V-shaped block 57 facing the corresponding V-shaped cutter 502. The inclined angle of the V-shaped cutter 502 is adapted to the inclined angle of the inclined part 503. When the V-shaped cutter 502 moves closer to the V-shaped cover plate 55 and the V-shaped block 57, the inclined angle of the V-shaped cutter 502 fits against the inclined part 503, thereby achieving the effect of the V-shaped cutter 502 and the inclined part 503 fitting together, which improves the effect of cutting off the polyurethane foam scraps.

[0074] As the packaging bag 6 impacts the V-shaped cutter 502, the V-shaped cover plate 55 simultaneously impacts the bottom of the packaging bag 6. The top of the V-shaped cover plate 55 is also designed with a cutter structure, further increasing the size of the tear at the bottom of the packaging bag 6.

[0075] If large pieces of polyurethane foam scrap fall onto the bag-breaking component 5 and are still blocked, the V-shaped cutter 502 is moved multiple times. The V-shaped cutter 502, together with the V-shaped block 57 and the V-shaped cover plate 55, cuts and crushes the large pieces of polyurethane foam scrap. Then, the telescopic cylinder 54 pushes the V-shaped cover plate 55 down. The V-shaped cover plate 55 and the V-shaped block 57 work together to crush the large pieces of polyurethane foam scrap again, thus preventing the polyurethane foam scrap from being blocked.

[0076] Example 4: A method for recycling and crushing polyurethane foam scrap, using the polyurethane foam scrap recycling and crushing device described above, includes the following steps:

[0077] S1. The packaging bag 6 filled with polyurethane foam scraps is hoisted using the hoisting assembly 3 and transferred to the inside of the crushing box 22.

[0078] The more specific steps in S1 are as follows:

[0079] S11. First, the lifting chain is released through the winding mechanism 34, causing the connecting plate 35 and the bearing plate 36 to move down, causing the bearing plate 36 to descend to the ground position. The lifting strap at the top of the packaging bag 6 is passed through by two connecting rods 39, and the corresponding lifting ropes 373 are released through four electric reels 372, causing the connecting block 374 to extend downward along the four corners of the packaging bag 6.

[0080] S12. After the four connecting blocks 374 extend to the four corners of the bottom of the packaging bag 6, the insert rods 375 on the connecting blocks 374 are inserted into the inside of the packaging bag 6, and the position of the insert rods 375 is positioned by the barbs 376. After positioning, the lifting chain on the winding mechanism 34 is wound up, causing the packaging bag 6 to be lifted. Then, the packaging bag 6 is moved to the inside of the crushing box 22 by the transfer trolley 33 on the boom 32.

[0081] S2. After the movement is completed, the packaging bag 6 is clamped once using the adjustment component 4. Then, the lifting component 3 drives the adjustment component 4 to rotate at a preset angle. Then, the packaging bag 6 is clamped a second time using the adjustment component 4. This process is repeated, causing the polyurethane foam scraps inside the packaging bag 6 to be squeezed and adjusted in position, reducing the probability of the polyurethane foam scraps being stuck. At the same time, the lifting component 3 is used to adjust the swaying of the packaging bag 6.

[0082] The more specific steps of S2 are as follows:

[0083] S21. After the movement is completed, the two adjusting cylinders 43 are used to push the corresponding hinge plate 42 to swing inside the crushing box 22 and squeeze the packaging bag 6 once. Then, the rotating cylinder 38 drives the bearing plate 36, connecting rod 39 and four sets of adjusting mechanisms 37 to rotate as a whole, causing the packaging bag 6 to rotate at a preset angle. Then, the hinge plate 42 is controlled to swing inside the crushing box 22 again, so that the hinge plate 42 clamps the packaging bag 6 a second time. This process is repeated, so that the polyurethane foam scraps inside the packaging bag 6 are squeezed and adjusted to reduce the probability of the polyurethane foam scraps being stuck.

[0084] S22. Simultaneously, during the rotation of the packaging bag 6, four sets of electric reels 372 release or rewind the corresponding suspension ropes 373, thereby adjusting the tension of the four suspension ropes 373 and adjusting the swaying of the packaging bag 6.

[0085] S3. After the packaging bag 6 is squeezed, the lifting component 3 releases the packaging bag 6, causing the packaging bag 6 to move down quickly and collide with the bag breaking component 5, causing the bottom of the packaging bag 6 to be broken open. The polyurethane foam scraps inside the packaging bag 6 are released and fall above the crushing roller 28, and then the polyurethane foam scraps are crushed by the rotation of the crushing roller 28.

[0086] The more specific steps for S3 are as follows:

[0087] S31. After the packaging bag 6 is squeezed, the winding mechanism 34 releases the lifting chain again, causing the packaging bag 6 to be released at an accelerated speed. This causes the packaging bag 6 to move down quickly and collide with the four V-shaped cutters 502, resulting in the bottom of the packaging bag 6 being broken open. The polyurethane foam scraps inside the packaging bag 6 are released and fall above the crushing roller 28, where they are then crushed by the rotation of the crushing roller 28.

[0088] S32. Subsequently, the electric slide rail 58 drives the corresponding slider 501 and V-shaped cutter 502 to move. The four V-shaped cutters 502 separate from each other, thereby increasing the size of the opening at the bottom of the packaging bag 6, ensuring that large pieces of polyurethane foam scraps can fall out of the packaging bag 6. If large pieces of polyurethane foam scraps fall onto the bag-breaking component 5 and are blocked, the movement of the V-shaped cutter 502, together with the V-shaped block 57 and the V-shaped cover plate 55, cuts and crushes the large pieces of polyurethane foam scraps. Then, the telescopic cylinder 54 pushes the V-shaped cover plate 55 down, and the V-shaped cover plate 55 and the V-shaped block 57 work together to crush the large pieces of polyurethane foam scraps again, avoiding the situation where the polyurethane foam scraps are blocked.

[0089] S33. Furthermore, after the bottom of the packaging bag 6 is broken, the four sets of electric reels 372 simultaneously wind up the corresponding lifting ropes 373. The lifting ropes 373 pull the connecting block 374 and the insert rod 375 upward. Since the insert rod 375 is fixed to the packaging bag 6 by the barbs 376, when the insert rod 375 and the connecting block 374 are pulled upward, the four corners of the packaging bag 6 are pulled upward at the same time, which makes it easier for the polyurethane foam scraps to fall from the inside of the packaging bag 6.

[0090] S4. After the polyurethane foam scraps are crushed, they are conveyed to the bottom of the conveyor box 21 and discharged.

[0091] The more specific steps for S4 are as follows:

[0092] S41. After the polyurethane foam scraps are crushed, they fall to the bottom of the crushing box 22. Then, the second drive motor 25 and the reducer 26 work together to drive the rotating shaft 23 and the spiral blades 27 to rotate. The polyurethane foam scraps accumulated at the bottom of the crushing box 22 are transported to the inside of the conveying box 21 by the spiral blades 27 and released.

[0093] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

Claims

1. A polyurethane foam scrap recycling and crushing device, characterized in that: It includes a workbench (1) and a crushing assembly (2) installed on the top of the workbench (1). The crushing assembly (2) includes a conveyor box (21) and a crushing box (22), which are connected to each other. A crushing roller (28) rotates inside the crushing box (22). The crushing box (22) is equipped with an adjustment assembly (4) and a bag breaking assembly (5). The top of the crushing box (22) is equipped with a hoisting assembly (3). The hoisting assembly (3) includes a column (31) and a boom (32) set on the outer wall of the column (31). A transfer trolley (33) slides on the bottom of the boom (32). A winding mechanism (34) is installed on the bottom of the transfer trolley (33). A connecting plate (35) is connected to the bottom of the winding mechanism (34). A bearing plate (36) is set on the bottom of the connecting plate (35). An adjustment mechanism (37) is set at the four corners of the bearing plate (36). A packaging bag (6) is provided below the support plate (36), and the output end of the adjustment mechanism (37) is connected to the four corner side walls of the packaging bag (6); The crushing assembly (2) also includes a first drive motor (24) installed on one side of the workbench (1). The output end of the first drive motor (24) is connected to the outer wall of the crushing roller (28) through a belt drive mechanism. A second drive motor (25) and a reducer (26) are installed on one side of the workbench (1). The output end of the second drive motor (25) is connected to the input end of the reducer (26) through a belt drive mechanism. The output end of the reducer (26) extends into the interior of the crushing box (22) and is connected to a rotating shaft (23). The rotating shaft (23) extends into the interior of the conveying box (21) and is connected to a spiral blade (27) on its outer wall. A rotary cylinder (38) is installed on the top of the connecting plate (35). The output end of the rotary cylinder (38) passes through the connecting plate (35) downward and is connected to the top of the bearing plate (36). A connecting rod (39) is connected to both sides of the bearing plate (36). The connecting rod (39) passes through the lifting strap at the top of the packaging bag (6). A through groove (301) is opened on the top of the crushing box (22). The through groove (301) is configured in conjunction with the winding mechanism (34) and the transfer trolley (33). The adjustment assembly (4) is located above the bag breaking assembly (5), and the adjustment assembly (4) includes two fixed rods (41) symmetrically connected to the top wall inside the crushing box (22). The outer walls of the two fixed rods (41) are rotatably connected to hinge plates (42). The two sides of the crushing box (22) are hinged with adjustment cylinders (43). The two adjustment cylinders (43) are correspondingly arranged with the two hinge plates (42). The piston rod end of the adjustment cylinder (43) is hinged to the side wall of the corresponding hinge plate (42).

2. The polyurethane foam scrap recycling and crushing device according to claim 1, characterized in that: Each of the four adjustment mechanisms (37) includes a bracket (371) mounted on the top of the support plate (36). An electric reel (372) is rotatably connected inside the bracket (371). A hanging rope (373) is wound around the outer wall of the electric reel (372). One end of the hanging rope (373) extends downward to the side wall of the packaging bag (6) and is connected to a connecting block (374). A plurality of insert rods (375) are connected to one side of the connecting block (374).

3. The polyurethane foam scrap recycling and crushing device according to claim 2, characterized in that: The outer wall of the insertion rod (375) is connected to a barb (376), one end of which is inclined toward the connecting block (374).

4. The polyurethane foam scrap recycling and crushing device according to claim 1, characterized in that: The bag breaking assembly (5) includes a frame (51) installed inside the crushing box (22) and second corner plates (53) connected to the lower corners of the inner side wall of the frame (51). Each second corner plate (53) has a fixed seat (56) connected to its side wall. A V-shaped cutter (502) is provided below the fixed seat (56), and the four V-shaped cutters (502) are arranged opposite each other.

5. The polyurethane foam scrap recycling and crushing device according to claim 4, characterized in that: Each of the fixed seats (56) is equipped with an electric slide rail (58), and a slider (501) is slidably connected to the bottom of the electric slide rail (58). The V-shaped cutter (502) is installed on the side wall of the corresponding slider (501). A guide rod (59) is horizontally connected inside the fixed seat (56), and the slider (501) is slidably connected to the outer side wall of the corresponding guide rod (59).

6. The polyurethane foam scrap recycling and crushing device according to claim 5, characterized in that: The inner sidewall of the frame (51) is equipped with a first corner plate (52) at the top of the four corners. A telescopic cylinder (54) is vertically installed on the top of the first corner plate (52). The piston rod of the telescopic cylinder (54) passes through the corresponding first corner plate (52) and is connected to a V-shaped cover plate (55). A V-shaped block (57) is connected to the top of each fixed seat (56). The V-shaped cover plate (55) and the V-shaped block (57) are adapted to each other. An inclined part (503) is opened on the side of the V-shaped cover plate (55) and the V-shaped block (57) facing the corresponding V-shaped cutter (502). The inclination angle of the V-shaped cutter (502) is adapted to the inclination angle of the inclined part (503).

7. A method for recycling and crushing polyurethane foam scraps, using a polyurethane foam scrap recycling and crushing device as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. The packaging bag (6) filled with polyurethane foam scraps is hoisted using the hoisting assembly (3), and the packaging bag (6) is transferred to the inside of the crushing box (22); S2. After the movement is completed, the packaging bag (6) is clamped once using the adjustment component (4). Then the lifting component (3) drives the adjustment component (4) to rotate at a preset angle. Then the packaging bag (6) is clamped a second time using the adjustment component (4). This process is repeated to squeeze and adjust the position of the polyurethane foam scraps inside the packaging bag (6), reducing the probability of the polyurethane foam scraps being stuck. At the same time, the shaking of the packaging bag (6) is adjusted using the lifting component (3). S3. After the packaging bag (6) is squeezed, the lifting assembly (3) releases the packaging bag (6), causing the packaging bag (6) to move down quickly and collide with the bag breaking assembly (5), causing the bottom of the packaging bag (6) to be broken open. The polyurethane foam scraps inside the packaging bag (6) are released and fall above the crushing roller (28), and then the polyurethane foam scraps are crushed by the rotation of the crushing roller (28). S4. After the polyurethane foam scraps are crushed, they are conveyed to the bottom of the conveyor box (21) and discharged.

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