A PVC substrate crushing device

Abstract

This invention provides a PVC substrate crushing device, including a mounting bracket with a shell structure fixed on it; a transport component for conveying PVC substrate is installed in the inner cavity of the horizontal shell, a pre-folding component is provided on the side of the transport component near the arc-shaped shell, and a pressing component is provided in the inner cavity of the arc-shaped shell; a crushing shell is fixed at the bottom of the vertical shell, and a receiving hopper is placed directly below the crushing shell; a crushing component driven by a drive component is installed in the inner cavity of the crushing shell; baffles are provided on both sides of the transport component. By using the pre-folding component to press a pre-folding groove on the surface of the plate-shaped PVC substrate before crushing it, the rigid PVC sheet, which is originally relatively strong but somewhat brittle, can preferentially break along the predetermined weakened area during the subsequent pressing process. With this method of pre-setting the fracture path, the pressed PVC sheet can be split into block structures with more uniform size and easier volume control.

Description

Technical Field

[0001] This invention relates to the field of PVC substrate recycling, specifically to a PVC substrate crushing device. Background Technology

[0002] In existing technologies, rigid PVC substrates typically exist in sheet form, with a dense and rigid overall structure, but exhibiting a degree of brittleness under external force. Therefore, when recycling or reprocessing such sheet-like PVC substrates, it is generally necessary to first break them into small pieces suitable for subsequent processing. However, because rigid PVC sheets often have strong integrity without pretreatment, random breakage is prone to occur during the pressing step before crushing, resulting in fragments with uneven size and irregular shape.

[0003] Traditional processing methods typically involve directly applying pressure to PVC sheets to cause them to crack. However, the stress surface and fracture path are difficult to control, often resulting in a mixture of large and small fragments. When fragments of significantly different sizes enter the crushing unit, they can cause fluctuations in the force applied to the crushing teeth, excessive instantaneous impact, or air cutting, leading to jamming, blockages, and other malfunctions, affecting the continuity of the crushing process and the stability of the equipment. Furthermore, the uncontrollable initial material shape results in low crushing efficiency, difficulty in maintaining uniform particle size, and additional wear and energy consumption on the crushing mechanism.

[0004] Therefore, there is an urgent need for a treatment method that can effectively weaken and controllably guide the fracture of rigid PVC sheets before crushing, so that they break along a predetermined path during the pressing process, forming small, more uniform pieces of substrate that are easier to crush later, thereby improving the stability and efficiency of the overall PVC recycling process.

[0005] Therefore, a PVC substrate crushing device is provided to address the above-mentioned problems. Summary of the Invention

[0006] In order to solve the problems of uncontrollable initial material shape of rigid PVC substrate, low crushing efficiency, difficulty in maintaining uniform particle size, and additional wear and energy consumption of the crushing mechanism, this invention provides a PVC substrate crushing device.

[0007] The present invention solves the above-mentioned technical problems through the following technical solutions: The present invention provides a PVC substrate crushing device, including a mounting bracket, on which a shell structure is fixed. The shell structure includes a horizontal shell and a vertical shell, which are connected to each other by an arc-shaped shell. The central angle of the arc-shaped shell is 90°, and the arc-shaped shell and the vertical shell are preferably integrally formed. A transport assembly for conveying PVC substrate is installed in the inner cavity of the transverse shell. A pre-folding assembly is provided on the side of the transport assembly near the arc-shaped shell. A pressing assembly is provided in the inner cavity of the arc-shaped shell. A crushing shell is fixed to the bottom of the vertical shell, and a receiving hopper is placed directly below the crushing shell; The inner cavity of the crushing shell is equipped with a crushing component driven by a drive assembly; baffles are provided on both sides of the transport assembly.

[0008] The feed inlet is located at the end of the horizontal shell.

[0009] This invention first presses the sheet-like PVC substrate into a larger block structure before crushing it. Before pressing, a pre-folding component presses pre-folding grooves into the sheet-like PVC substrate. This prevents the brittle texture of the rigid PVC substrate from causing large differences in the size of the pressed blocks, which could lead to jamming or other adverse situations during the subsequent pressing process.

[0010] By pressing pre-folding grooves into the sheet-like PVC substrate using pre-folding components, small blocks with relatively controllable volume are formed when the sheet-like PVC substrate is pressed subsequently.

[0011] In this technical solution, the transport component includes two self-rotating drive rollers, the surfaces of which are wrapped with a conveyor belt. One drive roller is mounted on the inner wall of the transverse shell, and the other drive roller is disposed on the outside of the transverse shell and mounted on the outer wall of the transverse shell. The main shaft of the first motor is fixed at the center of the circular sidewall of one end of the transmission roller located outside the transverse shell. Both sides of the conveyor belt are provided with baffles protruding from their surfaces, and the baffles are fixed on the inner wall of the transverse shell. The first motor drives the connected transmission roller to rotate, which in turn moves the conveyor belt. The sheet-shaped PVC substrate to be crushed and recycled is placed on the conveyor belt exposed outside the transverse shell, and the moving conveyor belt moves the substrate towards one side of the arc-shaped shell.

[0012] In this technical solution, a limiting component is also provided on the top of the transport component. The limiting component includes a driving component provided on the inner wall of the horizontal shell. On the side of the driving component away from the vertical shell, there are multiple pushing components stacked vertically. The distance between the bottommost pushing component and the transport surface of the transport component corresponds to the maximum thickness of the PVC substrate that the limiting component is allowed to pass through.

[0013] The drive unit is connected to each pusher component via a transmission component, and during operation, it drives each pusher component to move sequentially from bottom to top via the transmission component.

[0014] By pushing the material from bottom to top, the substrate with excessively thick stacking height is gradually pushed away from the side of the curved shell, so as to avoid the substrate with excessively thick stacking height having unsatisfactory pre-folding and pressing effects when passing through the pre-folding and pressing components.

[0015] In this technical solution, the driving component includes a rotating shaft installed in the inner cavity of the transverse shell. The rotating shaft is arranged parallel to the transmission roller. Multiple transmission plates arranged in a ring array are fixed on the annular surface of the rotating shaft. The transmission components include a transmission bar that can engage with a rotating transmission plate, and the transmission bar is fixedly connected to the pusher via a transmission rod; The pusher includes a pusher plate fixedly connected to the transmission component. Both ends of the pusher are fixed with sliders, which are slidably connected to the guide rail. The guide rail is fixed to the side wall of the baffle plate. Adjacent pusher plates overlap each other. The topmost pusher plate extends upward and approaches or passes over the top of the baffle plate. A spring-loaded component is installed between the slider and the guide rail.

[0016] The second motor drives the spindle to rotate, and the transmission plate on the spindle rotates synchronously. The end of the transmission plate pushes the transmission bar plate from bottom to top in sequence to move away from the side of the arc shell, thereby pushing the pusher plate to slide on the guide rail through the transmission rod.

[0017] In this technical solution, the pre-folding assembly includes two symmetrically arranged pre-folding units. The symmetrical plane of the two pre-folding units is the transport surface for transport rotation. The pre-folding unit includes a first mounting frame, which is fixed on the side wall of the transverse shell. A first drive rod arranged vertically is fixed on the first mounting frame. A pre-folding strip is fixed on the telescopic end of the first drive rod. The side of the pre-folding strip closest to the transport surface has a pointed structure.

[0018] The two first drive rods extend simultaneously, thereby driving the two pre-folded strips to move in similar directions, pressing them onto the upper and lower surfaces of the PVC substrate transported there by the transport component, and pre-pressing them to form pre-folded grooves on the surface of the PVC substrate.

[0019] In this technical solution, a pressing assembly is also included. The pressing assembly includes a connecting horizontal plate, which is slidably connected to the telescopic end of the first drive rod. Guide telescopic rods distributed vertically are fixed on both sides of the connecting horizontal rod. The bottom ends of the two guide telescopic rods are fixed to both ends of the pre-pressed wide plate. A pre-folding through groove is opened on the surface of the pre-pressed wide plate for the pre-folded strip to pass through. A second spring is sleeved on the surface of the guide telescopic rod. When the second spring is not deformed, the pre-compressed wide plate is closer to the transport surface than the pre-folded strip plate.

[0020] As the pre-folded strip moves with the extension of the first drive rod, the pre-pressed wide plate contacts the surface of the PVC substrate first. At this time, the first drive rod continues to extend, the guide telescopic rod shortens, and the second spring deforms, that is, the pre-pressed wide plate first presses against the surface of the PVC substrate until the pre-folded strip passes through the pre-folding groove and presses out the pre-folding groove on the surface of the PVC substrate.

[0021] By pre-pressing a larger pre-stressed wide plate onto the surface of the PVC substrate, it is possible to avoid the formation of overly irregular cracks on the surface of the PVC substrate when it is pre-folded.

[0022] In this technical solution, the pressing component includes a second mounting bracket, which is mounted on the outer wall of the arc-shaped shell. A second drive rod is fixed on the second mounting bracket and arranged radially along the arc-shaped shell. A fixing bracket is fixed on the telescopic end of the second drive rod, and multiple pressing strips are fixed on the fixing bracket and distributed axially along the arc-shaped shell. It also includes a guide arc plate, with its two ends fixed to the two inner walls of the arc shell. The guide arc plate is located at the bottom of the transport surface and is concentrically set with the arc shell. The guide arc plate has pressing slots that correspond to the number and position of the pressing strips, and the pressing strips can pass through the corresponding pressing slots.

[0023] The first and second drive rods are preferably one of an electric actuator, a hydraulic actuator, and a pneumatic actuator.

[0024] When the first drive rod and the second drive rod are located outside the shell structure, the first mounting bracket and the second mounting bracket are fixed to the transverse outer wall of the shell and the arc-shaped outer wall of the shell, respectively, and the telescopic ends of the first drive rod and the second drive rod penetrate through the side wall of the shell structure.

[0025] The second drive rod extends, causing the pressing strip to move towards one side of the guide arc plate until the pressing strip enters the pressing groove, thus completing the pressing of the PVC substrate on the surface of the guide arc plate.

[0026] Preferably, the distance between two adjacent pressing grooves is similar to the distance between two adjacent pre-folding grooves.

[0027] In this technical solution, the drive component includes a drive motor, which is fixed on the mounting bracket and is connected to the crushing component via a belt drive structure.

[0028] In this technical solution, the crushing component includes two symmetrically arranged rotating rollers. Both sides of the rotating rollers penetrate the side wall of the crushing shell and are fixedly connected to the inner ring of the bearing on the side wall of the crushing shell. The bearing is fixed on the outer wall of the crushing shell. The belt drive structure includes a drive pulley and a driven pulley. The drive pulley is fixed on the output end of the drive motor and is connected to the driven pulley via a transmission belt. The driven pulley is fixed on the end of one of the rotating rollers. A transmission gear is fixed to the end of each of the two rotating rollers, and the transmission gears on the same side of the two rotating rollers are meshed with each other. Two rotating rollers are fitted with interlocking crushing tooth plates.

[0029] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0030] The positive and progressive effects of this invention are as follows: By using a pre-folding component to press pre-fold grooves onto the surface of the sheet-like PVC substrate before crushing, the rigid PVC sheet, which is originally relatively strong but somewhat brittle, can preferentially break along predetermined weakened areas during subsequent pressing. This pre-defined fracture path allows the pressed PVC sheet to split into more uniformly sized and more easily controlled block structures.

[0031] Unlike the random fractures that may occur when no pre-folding groove is set, the guiding effect of the pre-folding groove can effectively avoid the mixing of large and small fragments caused by sudden changes in local stress, thereby reducing the risk of malfunctions such as jamming and blockage caused by excessive differences in block size, and significantly improving the stability and continuity of subsequent crushing processes.

[0032] This provides a more stable and controllable initial material shape for subsequent crushing processes, enabling the crushing teeth to work continuously on a relatively uniform block substrate, avoiding fluctuations in cutting load, excessive impact force, or empty cutting caused by irregular material shape. This not only improves overall crushing efficiency and the consistency of crushed particle size but also helps reduce equipment wear and energy consumption, significantly enhancing the reliability and economy of the entire PVC recycling process. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 For the present invention Figure 1 A structural diagram from another perspective; Figure 3 For the present invention Figure 1 A top-view structural diagram; Figure 4 For the present invention Figure 3 A schematic diagram of the planar structure of the cross-section at point AA; Figure 5 For the present invention Figure 4 A magnified schematic diagram of the local structure at point I; Figure 6 For the present invention Figure 3 A three-dimensional structural diagram of the cross-section at point AA; Figure 7 This is a schematic diagram of the structure after the cloaking shell structure of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the side view structure; Figure 9For the present invention Figure 7 A structural diagram from another perspective; Figure 10 For the present invention Figure 9 A magnified schematic diagram of the structure at point J; Figure 11 This is a schematic diagram of the pre-folding component of the present invention; Figure 12 This is a schematic diagram of the pressing component of the present invention.

[0034] Explanation of reference numerals in the attached figures 1. Install the bracket; 2. Shell structure; 21. Horizontal shell; 22. Vertical shell; 23. Crushing shell; 24. Baffle plate; 25. Guide ramp; 3. Drive components; 31. Drive motor; 32. Transmission gears; 4. Crushing assembly; 41. Rotating roller; 42. Crushing toothed plate; 5. Receiving hopper; 6. Transport components; 61. Drive rollers; 62. Conveyor belt; 7. Material limiting assembly; 71. Rotating shaft; 72. Transmission plate; 73. Transmission component; 731. Transmission bar; 732. Transmission rod; 74. Pusher plate; 75. Slider; 76. Guide rail; 8. Pre-folding unit; 81. First mounting bracket; 82. First drive rod; 83. Pre-folding strip; 84. Pre-pressed wide plate; 841. Pre-folding through groove; 85. Connecting horizontal plate; 86. Guide telescopic rod; 9. Pressing assembly; 91. Second mounting bracket; 92. Second drive rod; 93. Fixing bracket; 94. Pressing strip; 95. Guide arc plate; 951. Pressing through groove. Detailed Implementation

[0035] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0036] like Figures 1-4 As shown, a PVC substrate crushing device includes a mounting bracket 1, on which a shell structure 2 is fixed. The shell structure 2 includes a horizontal shell 21 and a vertical shell 22. The horizontal shell 21 and the vertical shell 22 are connected to each other by an arc-shaped shell, and the central angle of the arc-shaped shell is 90°. Preferably, the arc-shaped shell and the vertical shell 22 are integrally formed. A transport component 6 for conveying PVC substrate is installed in the inner cavity of the transverse shell 21. A pre-folding component is provided on the side of the transport component 6 near the arc-shaped shell, and a pressing component 9 is provided in the inner cavity of the arc-shaped shell. A crushing shell 23 is fixed to the bottom of the vertical shell 22, and a receiving hopper 5 is placed directly below the crushing shell 23. The inner cavity of the crushing shell 23 is equipped with a crushing component 4 driven by the drive component 3; baffles 24 are provided on both sides of the transport component 6.

[0037] The end of the transverse shell 21 is the feed inlet.

[0038] Specifically, the transport assembly 6 includes two self-rotating drive rollers 61, with a conveyor belt 62 wrapped around the surface of the two drive rollers 61. One drive roller 61 is mounted on the inner wall of the transverse shell 21, and the other drive roller 61 is disposed on the outside of the transverse shell 21 and mounted on the outer wall of the transverse shell 21. The main shaft of the first motor is fixed at the center of the circular sidewall of the transmission roller 61 located outside the transverse shell 21. Both sides of the conveyor belt 62 are provided with baffle plates 24 protruding from their surfaces, and the baffle plates 24 are fixed on the inner wall of the transverse shell 21. The first motor drives the transmission roller 61 connected to it to rotate, thereby driving the conveyor belt 62 to move. The sheet-shaped PVC substrate to be crushed and recycled is placed on the conveyor belt 62 exposed outside the transverse shell 21, and the moving conveyor belt 62 drives the substrate to move towards one side of the arc-shaped shell.

[0039] The motor is not shown in the diagram.

[0040] The transport component 6 is a belt drive transport structure commonly used in the prior art.

[0041] The outer wall of the conveyor belt 62 is the transport surface of the transport component 6.

[0042] like Figure 5 As shown, it also includes a material limiting component 7 disposed on the top of the transport component 6. The material limiting component 7 includes a driving component disposed on the inner wall of the transverse shell 21. On the side of the driving component away from the vertical shell 22, there are multiple pushing components stacked vertically in sequence. The distance between the bottommost pushing component and the transport surface of the transport component 6 corresponds to the maximum thickness of the PVC substrate that the material limiting component 7 is allowed to pass through. The maximum thickness is the stacked thickness of two layers of plate-shaped PVC substrate. The distance between the bottommost pushing component and the transport surface of the transport component 6 does not exceed the stacked thickness of two and a half layers of PVC substrate.

[0043] The drive unit is connected to each pusher through the transmission unit 73, and during operation, it drives each pusher to move sequentially from bottom to top via the transmission unit 73.

[0044] By employing a bottom-up, step-by-step pushing action, substrates exceeding the set height can be pushed out in an orderly manner to the side away from the curved shell, ensuring that the thickness of the substrate entering subsequent workstations remains within a controllable range. This avoids problems such as insufficient pre-folding grooves being pressed out at the pre-folding component due to excessive substrate thickness, or uneven force and incomplete pressing at the pressing component 9.

[0045] This layered, progressive feeding method makes the substrate state more stable and consistent as it enters the pre-folding and pressing stages, thereby ensuring the forming quality of the pre-folding groove and the uniformity of the pressing fracture, greatly improving the reliability of the overall process and the efficiency of subsequent crushing.

[0046] The driving component includes a rotating shaft 71 installed in the inner cavity of the transverse shell 21. The rotating shaft 71 is arranged parallel to the transmission roller 61. Multiple transmission plates 72 arranged in a ring array are fixed on the annular surface of the rotating shaft 71. The transmission component 73 includes a transmission bar 731 that can engage with the rotating transmission plate 72. The transmission bar 731 is fixedly connected to the pusher component via the transmission rod 732. The pusher includes a pusher plate 74 fixedly connected to the transmission component 73. Both ends of the pusher are fixed with sliders 75. The sliders 75 are slidably connected to the guide rail 76. The guide rail 76 is fixed to the side wall of the baffle plate 24. Adjacent pusher plates 74 overlap each other. The topmost pusher plate 74 extends upward and approaches or passes over the top of the baffle plate 24. A spring-loaded component is provided between the slider 75 and the guide rail 76.

[0047] The second motor drives the spin shaft 71 to rotate, and the transmission plate 72 on the spin shaft 71 rotates synchronously. The end of the transmission plate 72 pushes the transmission strip 731 from bottom to top to move away from the arc-shaped shell, thereby pushing the pusher plate 74 to slide on the guide rail 76 through the transmission rod 732.

[0048] exist Figure 5 Looking at it from above, the transmission plate 72 rotates clockwise, and the outer wall cross-section of the transmission strip 731 that overlaps with the transmission plate 72 is an arc-shaped structure.

[0049] Both ends of the rotating shaft 71 are connected to the baffle plate 24. One end of the rotating shaft 71 is fixed with an extension shaft, which passes through the baffle plate 24 and the side wall of the transverse shell 21, and extends to connect with the output end of the second motor on the outer wall of the transverse shell 21.

[0050] The spring-loaded component includes a spring-loaded telescopic rod distributed along the sliding direction of the slider 75. The two ends of the spring-loaded telescopic rod are fixed to the slider 75 and the guide rail 76, respectively. A first spring is sleeved on the surface of the spring-loaded telescopic rod, and the two ends of the first spring are fixed to the two ends of the spring-loaded telescopic rod, respectively.

[0051] During the process of the transmission plate 72 pushing the transmission bar 731 to move, the first spring deforms. After the transmission plate 72 disengages from the transmission bar 731, the pusher plate 74 and the transmission bar 731 return to their original positions under the elastic force of the first spring restoring its deformation.

[0052] like Figure 11As shown, the pre-folding assembly includes two symmetrically arranged pre-folding units 8. The symmetrical plane of the two pre-folding units 8 is the transport surface for transport rotation. The pre-folding unit 8 includes a first mounting frame 81, which is fixed on the side wall of the transverse shell 21. A first drive rod 82 arranged vertically is fixed on the first mounting frame 81. A pre-folding strip 83 is fixed on the telescopic end of the first drive rod 82. The side of the pre-folding strip 83 near the transport surface has a pointed structure.

[0053] The two first drive rods 82 extend simultaneously, thereby driving the two pre-folded strips 83 to move in similar directions, pressing them onto the upper and lower surfaces of the PVC substrate transported there by the transport component 6, and forming pre-folded grooves on the surface of the PVC substrate.

[0054] It also includes a pressing assembly, which includes a connecting horizontal plate 85. The connecting horizontal plate 85 is slidably connected to the telescopic end of the first drive rod 82, and both sides of the connecting horizontal plate are fixed with guide telescopic rods 86 distributed vertically. The bottom ends of the two guide telescopic rods 86 are fixed to both ends of the pre-pressed wide plate 84. The surface of the pre-pressed wide plate 84 is provided with a pre-folding through groove 841 for the pre-folded strip plate 83 to pass through. A second spring is sleeved on the surface of the guide telescopic rod 86. When the second spring is not deformed, the pre-compressed wide plate 84 is closer to the transport surface than the pre-folded strip plate 83.

[0055] When the pre-folded strip 83 moves downward under the drive of the first drive rod 82, its front end pre-pressed wide plate 84 will first contact the surface of the PVC substrate. At this time, as the first drive rod 82 continues to extend, the guide telescopic rod 86 shortens accordingly, and the second spring is compressed and deformed, so that the pre-pressed wide plate 84 forms a stable pre-pressing effect on the substrate surface. Subsequently, the pre-folded strip 83 passes through the pre-folding through groove 841 with the further stroke of the first drive rod 82, and forms a pre-folding groove on the substrate surface.

[0056] Because the pressure-bearing area of ​​the pre-pressed wide plate 84 is significantly larger than that of the pre-folded strip 83, its initial pressing can form a uniform and stable pre-pressure on the surface of the PVC substrate, reducing local stress concentration and thus avoiding irregular surface cracks or abnormal breakage during the pre-folding process. This two-stage action of "pre-pressing first, then grooving" ensures more regular pre-folding groove formation and more clearly defined weakened areas in the substrate structure, which is beneficial for improving the controllability and consistency of subsequent pressing fracture.

[0057] The pressing assembly 9 includes a second mounting bracket 91, which is mounted on the outer wall of the arc-shaped shell. A second drive rod 92 is fixed on the second mounting bracket 91 and arranged radially along the arc-shaped shell. A fixing bracket 93 is fixed on the telescopic end of the second drive rod 92. A plurality of pressing strips 94 are fixed on the fixing bracket 93 and distributed axially along the arc-shaped shell. It also includes a guide arc plate 95, with its two ends fixed to the two inner walls of the arc shell respectively. The guide arc plate 95 is located at the bottom of the transport surface and is concentrically arranged with the arc shell. The guide arc plate 95 has pressing slots 951 that correspond to the number and position of the pressing strips 94. The pressing strips 94 can pass through the corresponding pressing slots 951.

[0058] The first drive rod 82 and the second drive rod 92 are preferably one of an electric push rod, a hydraulic rod, and a pneumatic rod.

[0059] When the first drive rod 82 and the second drive rod 92 are located outside the shell structure 2, the first mounting bracket 81 and the second mounting bracket 91 are fixed to the outer wall of the transverse shell 21 and the outer wall of the arc-shaped shell, respectively, and the telescopic ends of the first drive rod 82 and the second drive rod 92 penetrate through the side wall of the shell structure 2.

[0060] The second drive rod 92 extends, driving the pressing strip 94 to move towards one side of the guide arc plate 95 until the pressing strip 94 enters the pressing groove 951, thus completing the pressing of the PVC substrate on the surface of the guide arc plate 95.

[0061] Preferably, the distance between two adjacent pressing grooves 951 is similar to the distance between two adjacent pre-folding grooves.

[0062] like Figure 1 and Figure 2 As shown, the drive assembly 3 includes a drive motor 31, which is fixed on the mounting bracket 1 and is connected to the crushing assembly 4 via a belt drive structure.

[0063] The crushing assembly 4 includes two symmetrically arranged rotating rollers 41. Both sides of the rotating rollers 41 penetrate the side wall of the crushing shell 23 and are fixedly connected to the inner ring of the bearing on the side wall of the crushing shell 23. The bearing is fixed on the outer wall of the crushing shell 23. The belt drive structure includes a drive pulley and a driven pulley. The drive pulley is fixed on the output end of the drive motor 31. The drive pulley is connected to the driven pulley via a transmission belt. The driven pulley is fixed on the end of one of the rotating rollers 41. A transmission gear 32 is fixed to the end of each of the two rotating rollers 41, and the transmission gears 32 on the same side of the two rotating rollers 41 are meshed with each other. Two rotating rollers 41 are fitted with interlocking crushing tooth plates 42.

[0064] The drive motor 31 drives the drive pulley to rotate, and the drive pulley drives the driven pulley to rotate through the transmission belt, thereby driving the rotating roller 41 connected to it to rotate. By utilizing the meshing between the transmission gears 32, the two rotating rollers 41 rotate simultaneously to one side of the middle. The crushing tooth plate 42 on the rotating roller 41 crushes the PVC substrate falling between the two rotating rollers 41.

[0065] On the inner wall of the crushing shell 23 at the top of the two rotating rollers 41, there are guide plates 25. The two guide plates 25 guide the pressed PVC substrate between the two rotating rollers 41.

[0066] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A PVC substrate crushing device, comprising a mounting bracket (1), wherein a shell structure (2) is fixed on the mounting bracket (1), the shell structure (2) comprising a transverse shell (21) and a vertical shell (22), the transverse shell (21) and the vertical shell (22) being interconnected by an arc-shaped shell, characterized in that: The transverse shell (21) is equipped with a transport component (6) for conveying PVC substrate. The transport component (6) is provided with a pre-folding component on the side near the arc shell. The arc shell is provided with a pressing component (9). The bottom of the vertical shell (22) is fixed with a crushing shell (23), and a receiving hopper (5) is placed directly below the crushing shell (23). The inner cavity of the crushing shell (23) is equipped with a crushing component (4) driven by a drive component (3); baffles (24) are provided on both sides of the transport component (6). It also includes a material limiting component (7) disposed on the top of the transport component (6). The material limiting component (7) includes a driving member disposed on the inner wall of the transverse shell (21). On the side of the driving member away from the vertical shell (22), there are multiple pushing members stacked vertically in sequence. The distance between the bottommost pushing member and the transport surface of the transport component (6) corresponds to the maximum thickness of the PVC substrate that the material limiting component (7) is allowed to pass through. The drive component is connected to each pusher component via the transmission component (73), and during operation, it drives each pusher component to move sequentially from bottom to top via the transmission component (73). The pre-folding assembly includes two symmetrically arranged pre-folding units (8). Each pre-folding unit (8) includes a first mounting bracket (81), which is fixed on the side wall of the transverse shell (21). A first driving rod (82) arranged vertically is fixed on the first mounting bracket (81), and a pre-folding strip (83) is fixed on the telescopic end of the first driving rod (82). It also includes a pressing assembly, which includes a connecting horizontal plate (85) that is slidably connected to the telescopic end of the first drive rod (82). Guide telescopic rods (86) are fixed on both sides of the connecting horizontal plate (85). The bottom ends of the two guide telescopic rods (86) are fixed to both ends of the pre-pressed wide plate (84). The surface of the pre-pressed wide plate (84) is provided with a pre-folding through groove (841) for the pre-folded strip (83) to pass through. The surface of the guide telescopic rod (86) is fitted with a second spring. When the second spring is not deformed, the pre-compressed wide plate (84) is closer to the transport surface than the pre-folded strip plate (83).

2. The PVC substrate crushing device as described in claim 1, characterized in that: The transport assembly (6) includes two self-rotating drive rollers (61), the surfaces of which are wrapped with a conveyor belt (62). One of the drive rollers (61) is mounted on the inner wall of the transverse shell (21), and the other drive roller (61) is disposed on the outside of the transverse shell (21) and mounted on the outer wall of the transverse shell (21). Both sides of the conveyor belt (62) are provided with baffles (24) protruding from its surface.

3. The PVC substrate crushing device as described in claim 1, characterized in that: The drive unit includes a rotating shaft (71) installed in the inner cavity of the transverse shell (21), and a plurality of transmission plates (72) arranged in a ring array are fixed on the annular surface of the rotating shaft (71). The transmission component (73) includes a transmission strip (731) that can engage with the rotating transmission plate (72), and the transmission strip (731) is fixedly connected to the pusher component via the transmission rod (732). The pusher includes a pusher plate (74) fixedly connected to the transmission component (73). Both ends of the pusher are fixed with sliders (75). The sliders (75) are slidably connected to the guide rail (76). The guide rail (76) is fixed to the side wall of the baffle plate (24). Two adjacent pusher plates (74) overlap each other. A spring-loaded component is provided between the slider (75) and the guide rail (76).

4. The PVC substrate crushing device as described in claim 1, characterized in that: The pressing assembly (9) includes a second mounting bracket (91), which is mounted on the outer wall of the arc-shaped shell. A second drive rod (92) is fixed on the second mounting bracket (91) and arranged radially along the arc-shaped shell. A fixing bracket (93) is fixed on the telescopic end of the second drive rod (92), and a plurality of pressing strips (94) are fixed on the fixing bracket (93) and distributed axially along the arc-shaped shell. It also includes a guide arc plate (95), the two ends of which are fixed to the two inner walls of the arc shell respectively. The guide arc plate (95) is located at the bottom of the transport surface. The guide arc plate (95) has a pressing through groove (951) that corresponds to the number and position of the pressing strips (94). The pressing strips (94) can pass through the corresponding pressing through grooves (951).

5. The PVC substrate crushing device as described in claim 1, characterized in that: The drive assembly (3) includes a drive motor (31), which is fixed on the mounting bracket (1) and is connected to the crushing assembly (4) via a belt drive structure.

6. The PVC substrate crushing device as described in claim 5, characterized in that: The crushing assembly (4) includes two symmetrically arranged rotating rollers (41). Both sides of the rotating rollers (41) penetrate the side wall of the crushing shell (23) and are fixedly connected to the inner ring of the bearing on the side wall of the crushing shell (23). The bearing is fixed on the outer wall of the crushing shell (23). The belt drive structure includes a drive pulley and a driven pulley. The drive pulley is fixed on the output end of the drive motor (31). The drive pulley is connected to the driven pulley via a transmission belt. The driven pulley is fixed on the end of one of the rotating rollers (41). A transmission gear (32) is fixed to the end of each of the two rotating rollers (41), and the transmission gears (32) on the same side of the two rotating rollers (41) are meshed with each other. The surfaces of the two rotating rollers (41) are fitted with interlocking crushing tooth plates (42).

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