Waste material crushing, recycling, and molding system and its production process for prepreg reprocessing

Abstract

This invention relates to the field of plastic waste recycling technology, specifically to a waste material crushing, recycling, and molding system and its production process for prepreg reprocessing. The system includes a crushing unit, a mixing and modification unit, and a molding unit. The crushing unit comprises: a cabinet; a first cylinder and a second cylinder mounted on the cabinet, with a gap between them; multiple blades evenly distributed along the circumference in the first cylinder, each blade being driven to rotate by a vertical shaft rotatably mounted within the cabinet; and a sieve disc located below the blades and connected to an intermittent ejection mechanism mounted within the cabinet. Through the reciprocating motion of the sieve disc combined with the elasticity of a spring, uncut material remaining on the sieve disc gains additional kinetic energy, increasing the opportunity for contact between the material and the blades, thereby reducing material residue on the sieve disc and improving the thoroughness of the crushing process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic waste recycling, in particular to a waste material crushing and recycling forming system for pre-preg reproduction and a production process thereof. BACKGROUND

[0002] Pre-preg is a kind of composite material, the main components of which include plastic matrix such as resin and reinforcing fibers. If the plastic component is directly landfilled after use, it will occupy the land for a long time and is difficult to degrade, causing soil pollution; if it is incinerated, it will release toxic and harmful gases such as dioxins generated by plastic burning, seriously polluting the atmospheric environment. Therefore, it is necessary to crush and recycle the plastic component in the pre-preg, which not only reduces environmental pollution, but also realizes the recycling of resources.

[0003] When crushing and processing waste materials, some existing crushing equipment usually sets a screen plate below the blade to control the particle size of the crushed materials. If the distance is too large, the materials that are crushed to the required particle size may be left between the blade and the screen plate, and this part of the material cannot be cut by the blade cutter, thereby causing material accumulation problems, so that the material cannot be normally discharged. If the blade and the screen plate are in contact, although the problem of material residue can be solved, the blade will continuously rub and collide with the screen plate during rotation, which will accelerate the wear of the blade, and even may cause damage such as deformation and cracking of the blade. For this reason, some equipment makes the screen plate as close to the blade as possible, but there is still a gap between the two. For some materials with good toughness or small size, they may still be left in this gap and cannot be effectively cut by the blade, resulting in material residue. The problem is still difficult to be effectively solved, and in actual work, the staff often need to stop regularly for processing. SUMMARY

[0004] The present application aims to provide a waste material crushing and recycling forming system for pre-preg reproduction and a production process thereof to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The waste material crushing and recycling forming system for pre-preg reproduction comprises a crushing unit, a mixing and modification unit, and a forming unit.

[0007] The crushing unit comprises:

[0008] A cabinet body;

[0009] The first cylinder and the second cylinder are arranged on the cabinet body, a gap is reserved between the first cylinder and the second cylinder, a plurality of blades are arranged in the first cylinder and are equidistantly distributed along the circumference, the blades can be rotated and installed in the vertical shaft in the cabinet body to rotate, each of the plurality of blades is connected with a set of displacement driving mechanism, the displacement driving mechanism can drive the blade to move along the radial direction of the first cylinder and extend out of the gap, and the plurality of blades are switched from the closed state to the open state.

[0010] The sieve disc is slidably arranged in the first cylinder and is below the blades, and is connected with the intermittent ejection mechanism arranged in the cabinet body, the intermittent ejection mechanism is connected with the vertical shaft and can drive the sieve disc to ascend and descend, so that the material on the sieve disc is upwardly ejected.

[0011] As a further scheme of the present application, the side of the cabinet body is provided with a driving motor, the output shaft of the driving motor is connected with the vertical shaft through a second belt, a plurality of guide columns are equidistantly arranged on the vertical shaft along the circumference, the guide columns are perpendicular to the vertical shaft, and the blades are slidably arranged on the guide columns.

[0012] As a further scheme of the present application, the displacement driving mechanism comprises a telescopic structure arranged on the outer wall of the first cylinder and a surrounding structure connected with the telescopic structure, the telescopic structure comprises a guide arm arranged on the outer wall of the first cylinder and a sliding arm slidably sleeved with the guide arm, and a gas cylinder is hingedly connected to the outer wall of the first cylinder, and the movable end of the gas cylinder is hingedly connected with the sliding arm.

[0013] As a further scheme of the present application, the surrounding structure comprises a first arc-shaped block arranged on the sliding arm, the inner wall of the first arc-shaped block is provided with a groove, a second arc-shaped block is slidably embedded in the groove, and the blades penetrate through the gap and are fixed with the second arc-shaped block.

[0014] When the plurality of blades are in the closed state, the inner walls of the first arc-shaped block and the second arc-shaped block are attached to the outer wall of the first cylinder, and the plurality of first arc-shaped blocks and the second arc-shaped blocks can form a ring structure which envelopes the first cylinder and the second cylinder.

[0015] As a further scheme of the present application, the intermittent ejection mechanism comprises a rotating structure connected with the vertical shaft and a reciprocating structure matched with the rotating structure, the reciprocating structure is connected with the sieve disc, the rotating structure rotates synchronously with the vertical shaft, can promote the reciprocating structure to store and release elastic potential energy, and when the reciprocating structure releases the elastic potential energy, can promote the sieve disc to upwardly throw the material.

[0016] As a further embodiment of the present invention: the rotating structure includes a gear ring and a gear rotatably mounted on the bottom wall of the cabinet, the gear meshing with the gear ring, and the rotating shaft of the gear being connected to the vertical shaft via a first belt, and a drive wheel cooperating with the reciprocating structure is mounted on the gear ring.

[0017] As a further embodiment of the present invention: the reciprocating structure includes multiple sets of elastic elements disposed in the cabinet and a driven element connecting the multiple sets of elastic elements, the elastic elements being connected to the sieve plate and the driven element cooperating with the drive wheel.

[0018] As a further embodiment of the present invention: the elastic element includes a vertical cylinder disposed in the cabinet body and a vertical rod fixed to the sieve tray and passing through the vertical cylinder, the vertical rod being slidably connected to the vertical cylinder, and a protruding ring fixed to the vertical rod being slidably disposed inside the vertical cylinder;

[0019] The vertical cylinder is also equipped with a spring sleeved on the outer periphery of the upright rod. The two ends of the spring abut against the inner wall of the vertical cylinder and the convex ring, respectively. The end of the upright rod away from the screen plate is connected to the driven member.

[0020] As a further embodiment of the present invention: the driven member includes a connecting ring fixedly connected to the end of the upright rod away from the sieve plate and a driven ring disposed below the connecting ring by a plurality of connecting arms. The outer wall of the driven ring is provided with a plurality of trapezoidal grooves, and the two sides of the grooves are respectively formed with an inclined surface and a vertical surface.

[0021] The prepreg reprocessing process, employing the aforementioned waste material crushing, recycling, and molding system, includes the following steps:

[0022] Step 1, pretreatment: collect and classify the waste recycled prepreg and remove impurities;

[0023] Step 2, crushing process: The crushing unit crushes the pre-treated waste recycled prepreg into powdered recycled material with 20mm particles;

[0024] Step 3, Mixing and Modification: The mixing and modification unit mixes the pulverized powdered recycled material with resin powder, film material, and additives.

[0025] Step four involves molding the mixed and modified particles into standard sheet products of predetermined sizes, thus completing the secondary production and application of the recycled prepreg.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] This application utilizes the reciprocating motion of the screen disc combined with the elastic action of the spring to give additional kinetic energy to the uncut material remaining on the screen disc, causing it to move towards the blades. This increases the chance of material contact with the blades, thereby reducing material residue on the screen disc and improving the thoroughness of the crushing process. It also makes reasonable use of the material's inertia, avoiding wear caused by contact between the blades and the screen disc, and effectively preventing material residue and insufficient crushing caused by gaps between the blades and the screen disc.

[0028] Secondly, the upward throwing action of the screen disc helps the blades effectively cut the material at different heights. Simultaneously, the reciprocating motion of the screen disc shakes the material, promoting the smooth passage of crushed material to the required particle size through the screen openings, thereby enhancing the overall crushing effect and screening efficiency.

[0029] In addition, multiple blades are installed inside the first cylinder, and the blades are driven by a cylinder to extend and retract in the radial direction of the first cylinder. When maintenance or cleaning of the blades is required, the cylinder drives the blades to move outward, so that they extend out of the first cylinder through the gap between the first and second cylinders. This design eliminates the complicated component disassembly steps in traditional crushers, provides a spacious operating space for maintenance work, and significantly reduces the difficulty of maintenance. Furthermore, when multiple blades are in the open state, the first arc block can effectively limit the second arc block, preventing the second arc block and the blades from rotating, thereby ensuring that the blades remain stationary and reliably locked during maintenance, effectively improving the safety and convenience of maintenance work. Attached Figure Description

[0030] Figure 1 A schematic diagram of one embodiment of a waste material crushing, recycling, and molding system for prepreg reprocessing.

[0031] Figure 2 This is a schematic diagram of another aspect of an embodiment of a waste material crushing, recycling, and molding system for prepreg reprocessing.

[0032] Figure 3 This is a schematic diagram of the structure of a waste material crushing, recycling, and molding system for the reprocessing of prepreg materials from another angle.

[0033] Figure 4 A schematic diagram of the internal structure of the cabinet in one embodiment of a waste material crushing, recycling, and molding system for prepreg reprocessing.

[0034] Figure 5 This is a schematic diagram of the internal structure of the cabinet from another angle in one embodiment of a waste material crushing, recycling, and molding system for prepreg reprocessing.

[0035] Figure 6 for Figure 4Enlarged view of the structure at point A in the middle.

[0036] Figure 7 This is a schematic diagram showing the retracted state of multiple blades in one embodiment of a waste material crushing, recycling, and molding system for prepreg reprocessing.

[0037] Figure 8 A schematic diagram of the connection state between the screen plate and the intermittent ejection mechanism in one embodiment of a waste material crushing, recycling and molding system for prepreg reprocessing.

[0038] Figure 9 for Figure 8 A structural diagram from another angle.

[0039] Figure 10 A schematic diagram of the displacement drive mechanism in one embodiment of a waste material crushing, recycling, and molding system for prepreg reprocessing.

[0040] Figure 11 An exploded view of the displacement drive mechanism in one embodiment of a waste material crushing, recycling, and molding system for prepreg reprocessing.

[0041] Figure 12 A schematic diagram of the blade rotation in one embodiment of a waste material crushing, recycling, and molding system for prepreg reprocessing.

[0042] In the diagram: 1. Cabinet; 2. First cylinder; 3. Second cylinder; 4. Gap; 5. Feed hopper; 6. Drive motor; 7. Vertical shaft; 8. Guide column; 9. Guide arm; 10. Sliding arm; 11. First arc block; 12. Second arc block; 13. Blade; 14. Cylinder; 15. Screen plate; 16. Vertical cylinder; 17. Vertical rod; 18. Convex ring; 19. Spring; 20. Connecting ring; 21. Connecting arm; 22. Driven ring; 2201. Inclined surface; 2202. Vertical surface; 23. Gear ring; 24. Gear; 25. First belt; 26. Drive wheel; 27. Second belt; 28. Support arm; 29. ​​Inclined plate; 30. Feed chute. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Furthermore, elements in this invention are referred to as being "disposed on" or "located on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0045] Please see Figures 1-12 In this embodiment of the invention, the waste material crushing, recycling and molding system for prepreg reprocessing includes a crushing unit, a mixing and modification unit and a molding unit.

[0046] The pulverizing unit includes:

[0047] Cabinet 1;

[0048] The first cylinder 2 and the second cylinder 3 are set on the cabinet 1. A gap 4 is reserved between the first cylinder 2 and the second cylinder 3. The first cylinder 2 is provided with multiple blades 13 that are equidistantly distributed along the circumference. The blades 13 can be driven to rotate by the vertical shaft 7 rotatably installed in the cabinet 1. Each of the multiple blades 13 is also connected to a set of displacement drive mechanism. The displacement drive mechanism can drive the blades 13 to move radially along the first cylinder 2 and extend out of the gap 4. The multiple blades 13 switch from the closed state to the open state.

[0049] The screen plate 15 is slidably disposed in the first cylinder 2, located below the blade 13, and connected to the intermittent ejection mechanism installed in the cabinet 1. The intermittent ejection mechanism is connected to the vertical shaft 7 and can drive the screen plate 15 to rise and fall, so that the material on the screen plate 15 is thrown upward.

[0050] It should also be noted that the crushing unit is responsible for crushing the waste prepreg to achieve a certain particle size range. It is a key link in the entire recycling and molding system, providing particles of suitable particle size for subsequent processing.

[0051] The hybrid modification unit mixes particles with resin powder, additives, etc., and modifies them as needed to give the material specific properties to meet the requirements of different application scenarios for molded products.

[0052] The molding unit is used to make new products from the mixed and modified particles through compression molding or injection molding, which is the final step in realizing the reuse of waste prepreg.

[0053] Secondly, a feeding hopper 5 is fixed to the upper part of the second cylinder 3, and the feeding hopper 5 is fixed to the cabinet 1 by two support arms 28;

[0054] The size of the sieve holes on the sieve plate 15 is designed according to the processing requirements, that is, only materials crushed to a specific size can pass through the sieve holes on the sieve plate 15. In addition, an inclined plate 29 is fixedly installed inside the cabinet 1, and a feeding chute 30 is provided on one side of the cabinet 1. The inclined plate 29 is inclined downward toward the feeding chute 30. As the blade 13 rotates, the material in the first cylinder 2 can be cut and crushed. The material with the required force falls through the sieve holes on the sieve plate 15 onto the inclined plate 29, and then slides out and is collected along the inclined plate 29 and the feeding chute 30 in sequence. The vertical shaft 7 passes through the inclined plate 29 and is sealed and rotatably connected to the inclined plate 29.

[0055] Please see Figure 12 Furthermore, the blade 13 has an upward-sloping cutting edge, which makes it easier for the blade 13 to cut into the material during rotation. Specifically, the blade lifts the material upwards during rotation, utilizing the material's own weight and inertia to make it easier for the blade 13 to grasp and shear it. This effectively improves the processing effect on softer or more tough materials, such as some incompletely cured prepreg waste, and effectively prevents the material from sliding on the blade 13, thus improving crushing efficiency.

[0056] Please refer to it again. Figure 7 and Figure 11 A drive motor 6 is installed on the side of the cabinet 1. The output shaft of the drive motor 6 is connected to the vertical shaft 7 via a second belt 27. Multiple guide posts 8 are also fixedly arranged equidistantly along the circumference of the vertical shaft 7. The guide posts 8 are perpendicular to the vertical shaft 7. The blade 13 is slidably mounted on the guide posts 8. The displacement drive mechanism includes a telescopic structure on the outer wall of the first cylindrical body 2 and a surrounding structure connecting the telescopic structure. The telescopic structure includes a guide arm 9 on the outer wall of the first cylindrical body 2 and a sliding arm 10 that slidably engages with the guide arm 9. A cylinder 14 is also hinged to the outer wall of the first cylindrical body 2, and the movable end of the cylinder 14 is hinged to the sliding arm 10.

[0057] It should be emphasized that in actual processing, with prolonged use, the blade 13 will gradually wear down due to continuous cutting of materials, and the blade will become dull. This will reduce crushing efficiency and increase the energy consumption of the equipment. Moreover, some components in the material may adhere to the blade 13. In particular, for some sticky materials or prepreg waste containing resin, glue and other components, an adhesive layer is easily formed on the surface of the blade 13, which affects the cutting performance of the blade 13. The blade 13 needs to be cleaned and maintained regularly to restore the sharpness of the blade.

[0058] When maintenance of the blade 13 is required, the movable end of the cylinder 14 extends, thereby driving the sliding arm 10 to slide away from the first cylinder 2 on the guide arm 9. Correspondingly, the sliding arm 10 drives the blade 13 to move outward from the first cylinder 2 through the gap 4 via the surrounding structure. Multiple blades 13 perform an expansion action and eventually move outward from the first cylinder 2. Then, the staff can begin to carry out the maintenance work of the blade 13.

[0059] The enclosing structure includes a first arc-shaped block 11 disposed on the sliding arm 10. The inner wall of the first arc-shaped block 11 is provided with a groove, and a second arc-shaped block 12 is slidably fitted in the groove. The blade 13 passes through the gap 4 and is fixed to the second arc-shaped block 12. When the multiple blades 13 are in the closed state, the inner walls of the first arc-shaped block 11 and the second arc-shaped block 12 are in contact with the outer wall of the first cylinder 2, and the multiple first arc-shaped blocks 11 and the second arc-shaped blocks 12 can form an annular structure that encloses the first cylinder 2 and the second cylinder 3.

[0060] When the blade 13 needs maintenance, the cylinder 14 drives the sliding arm 10 to move away from the first cylinder 2. Correspondingly, the first arc block 11 drives the second arc block 12 to move away from the first cylinder 2. The second arc block 12 then pulls the blade 13 through the gap 4 on the guide post 8 and out of the outside of the first cylinder 2. The multiple blades 13 switch from the retracted state inside the first cylinder 2 to the open state outside the first cylinder 2. In this way, the function of adjusting the position of the blade 13 is realized.

[0061] After the maintenance work is completed, the multiple blades 13 are retracted into the interior of the first cylinder 2. At this time, the inner walls of the first arc-shaped block 11 and the second arc-shaped block 12 are in contact with the outer wall of the first cylinder 2, which can seal the gap 4, thereby preventing material debris from escaping to the outside through the gap 4 during the crushing process.

[0062] Multiple blades 13 are arranged inside the first cylinder 2, and the blades 13 are driven to extend and retract in the radial direction of the first cylinder 2 by a cylinder 14. When maintenance or cleaning of the blades 13 is required, the cylinder 14 drives the blades 13 to move outward, so that they extend out of the first cylinder 2 through the gap 4 between the first cylinder 2 and the second cylinder 3. This design eliminates the complicated component disassembly steps in traditional crushers, provides a spacious operating space for maintenance work, and significantly reduces the difficulty of maintenance. In addition, when multiple blades 13 are in the open state, the first arc block 11 can effectively limit the second arc block 12 to prevent the second arc block 12 and the blades 13 from rotating, thereby ensuring that the blades 13 remain stationary and reliably locked during maintenance, effectively improving the safety and convenience of maintenance work.

[0063] Specifically, some existing blades 13 are usually fixed in position, that is, always located in the crushing chamber. When performing maintenance, the staff often need to disassemble some parts, and the overall operation process is relatively complicated. Moreover, some blades 13 may be located in a relatively small space, which can easily lead to inconvenience in operation. If the operation is not careful, the staff can easily be cut by the blades 13.

[0064] During the crushing process, the drive motor 6 drives the vertical shaft 7 to rotate via the second belt 27. The vertical shaft 7 then drives the blade 13 to rotate in the first cylinder 2 via the guide post 8. Correspondingly, the blade 13 causes the second arc block 12 to slide relative to the first arc block 11. Since both the guide post 8 and the second arc block 12 are connected to the blade 13, compared to the conventional installation method of the blade 13 (i.e., only one end of the blade 13 is directly fixed to its drive shaft), this unique design allows the blade 13 to be subjected to more uniform force during rotation, and the torque can be effectively distributed. This significantly improves the rotational stability of the blade 13, enhances its structural strength, reduces the vibration and deformation of the blade 13 when rotating at high speed and cutting materials, extends the service life of the blade 13, improves crushing efficiency and quality, and ensures that the equipment can maintain a high-efficiency and stable operating state when processing tough materials such as waste prepreg.

[0065] Please refer to it again. Figure 7 The intermittent ejection mechanism includes a rotating structure connected to the vertical shaft 7 and a reciprocating structure that cooperates with the rotating structure. The reciprocating structure is connected to the screen plate 15. The rotating structure rotates synchronously with the vertical shaft 7 and can cause the reciprocating structure to store and release elastic potential energy. When the reciprocating structure releases elastic potential energy, it can cause the screen plate 15 to throw the material upward.

[0066] Please refer to it again. Figure 8 and Figure 9The rotating structure includes a gear ring 23 and a gear 24 rotatably mounted on the bottom wall of the cabinet 1. The gear 24 meshes with the gear ring 23, and the rotation shaft of the gear 24 is connected to the vertical shaft 7 via a first belt 25. A drive wheel 26 that cooperates with the reciprocating structure is mounted on the gear ring 23. The reciprocating structure includes multiple sets of elastic elements disposed within the cabinet 1 and driven elements connecting the multiple sets of elastic elements. The elastic elements are connected to the sieve plate 15, and the driven elements cooperate with the drive wheel 26. The elastic element includes a vertical cylinder 16 disposed within the cabinet 1 and a vertical rod 17 fixed to the sieve tray 15 and passing through the vertical cylinder 16. The vertical rod 17 is slidably connected to the vertical cylinder 16, and a protruding ring 18 fixed to the vertical rod 17 is slidably disposed inside the vertical cylinder 16. A spring 19 is also disposed inside the vertical cylinder 16 and sleeved on the outer periphery of the vertical rod 17. The two ends of the spring 19 abut against the inner wall of the vertical cylinder 16 and the protruding ring 18, respectively. The end of the vertical rod 17 away from the sieve tray 15 is connected to the driven element.

[0067] It should be noted that the upright 17 passes through the inclined plate 29 and is in a sealed sliding connection with the inclined plate 29.

[0068] The driven component includes a connecting ring 20 fixedly connected to one end of the upright rod 17 away from the sieve plate 15, and a driven ring 22 disposed below the connecting ring 20 by a plurality of connecting arms 21. The outer wall of the driven ring 22 is provided with a plurality of trapezoidal grooves, and an inclined surface 2201 and a vertical surface 2202 are formed on both sides of the grooves, respectively.

[0069] During operation, the vertical shaft 7 drives the gear 24 to rotate via the first belt 25. The gear 24 then drives the gear ring 23 to rotate, causing the drive wheel 26 to make circular motion. When the drive wheel 26 contacts the inclined surface 2201, it will cause the driven ring 22 to move downward. Correspondingly, the driven ring 22 drives the vertical rod 17 to move downward via the connecting arm 21 and the connecting ring 20. The spring 19 is compressed, and the screen plate 15 moves downward a certain distance in the first cylinder 2.

[0070] After the drive wheel 26 disengages from the upper surface of the driven ring 22, the spring 19 will rebound instantly because the vertical surface 2202 is a vertical plane. Taking advantage of its rapid rebound, the sieve plate 15 can be quickly lifted and reset.

[0071] It should be noted that, with the appendix Figure 7Taking the state shown as an example, at this time, the screen plate 15 is at the highest position, the convex ring 18 abuts against the upper inner wall of the vertical cylinder 16, the spring 19 is subsequently compressed, and during the rebound process, the convex ring 18 will move upward and reset at a relatively fast speed, and the material on the screen plate 15 will be thrown upward due to inertia. The material that has been crushed to the appropriate force can be further cut by the blade 13.

[0072] The rotating structure serves to change speed. Specifically, during actual processing, the blade 13 rotates very fast, while the spring 19 needs time to rebound. That is, the process of the screen 15 throwing the material takes time. In order to ensure that this process is completed smoothly, the speed of the drive wheel 26 in circular motion should not be too fast. The gear 24 and the gear ring 23 can effectively reduce speed.

[0073] This application utilizes the reciprocating motion of the screen 15 combined with the elastic action of the spring 19 to give additional kinetic energy to the uncut material remaining on the screen 15, causing it to move towards the blade 13. This increases the chance of the material contacting the blade 13, thereby reducing the material residue on the screen 15, improving the thoroughness of the crushing process, and making reasonable use of the material's inertia. It eliminates the need for the distance between the screen 15 and the blade 13 to be too small or for the blade 13 to contact the screen 15, thus effectively avoiding the wear problem of the blade 13.

[0074] Furthermore, the upward throwing action of the screen disc 15 helps the blade 13 effectively cut the material at different heights. At the same time, the reciprocating motion of the screen disc 15 shakes the material, promoting the smooth passage of the crushed material to the required particle size through the screen holes on the screen disc 15, thereby enhancing the overall crushing effect and screening efficiency.

[0075] It should be further noted that controlling the feed rate is a crucial factor in fully utilizing the advantages of the crushing process and maintaining stable operation. Specifically, the reciprocating motion of the screen plate 15 and the instantaneous rebound force of the spring 19 are used to allow the uncut material on the screen plate 15 to reach the height of the blade 13 by inertia, thereby achieving further cutting. However, if too much material accumulates in the first cylinder 2 and the second cylinder 3, the movement range and inertia of the screen plate 15 will be affected, thus reducing the overall crushing performance. Therefore, in actual operation, the running speed of the waste material conveyor belt located above the feed hopper 5 should not be too high, and a suitable feed rate must be maintained.

[0076] As another embodiment of the present invention, a prepreg reprocessing process is also proposed, which uses the aforementioned waste material crushing, recycling, and molding system, and includes the following steps:

[0077] Step 1, pretreatment: collect and classify the waste recycled prepreg and remove impurities;

[0078] Step 2, crushing process: The crushing unit crushes the pre-treated waste recycled prepreg into powdered recycled material with 20mm particles;

[0079] Step 3, Mixing and Modification: The mixing and modification unit mixes the pulverized powdered recycled material with resin powder, film material, and additives.

[0080] Step four involves molding the mixed and modified particles into standard sheet products of predetermined sizes, thus completing the secondary production and application of the recycled prepreg.

[0081] The raw materials used in this invention contain 20mm particles, which are derived from recycled prepreg materials that have been cut or crushed. Standard boards are made by molding powdered waste materials and films or resin powders, thereby realizing the secondary use of waste prepreg materials.

[0082] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0083] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pre-preg recycled waste material powder crushing and recycling forming system, comprising a crushing unit, a mixing and modifying unit and a forming unit; characterized in that The crushing unit comprises: a cabinet body; a first cylinder and a second cylinder arranged on the cabinet body, a gap being reserved between the first cylinder and the second cylinder, a plurality of blades being arranged in the first cylinder and being equidistantly distributed along the circumference of the first cylinder, the blades being rotatably installed in the cabinet body and being driven to rotate by a vertical shaft, each of the plurality of blades being connected with a set of displacement driving mechanism, the displacement driving mechanism being capable of driving the blades to move along the radial direction of the first cylinder, extend out of the gap and switch from a closed state to an open state; a sieve disc being slidably arranged in the first cylinder below the blades and being connected with an intermittent ejection mechanism installed in the cabinet body, the intermittent ejection mechanism being connected with the vertical shaft and being capable of driving the sieve disc to ascend and descend so that the material on the sieve disc is thrown upward; a plurality of guide columns being equidistantly and fixedly arranged on the vertical shaft, the guide columns being perpendicular to the vertical shaft, and the blades being slidably arranged on the guide columns; the displacement driving mechanism comprising a telescopic structure arranged on the outer wall of the first cylinder and a surrounding structure connected with the telescopic structure, the telescopic structure comprising a guide arm arranged on the outer wall of the first cylinder and a sliding arm slidably fitted with the guide arm, the outer wall of the first cylinder being further hingedly connected with a gas cylinder, the movable end of the gas cylinder being hingedly connected with the sliding arm; the surrounding structure comprising a first arc-shaped block arranged on the sliding arm, the inner wall of the first arc-shaped block being provided with a groove, and a second arc-shaped block being slidably fitted in the groove, the blades penetrating through the gap and being fixed with the second arc-shaped block; when the plurality of blades are in the closed state, the inner walls of the first arc-shaped block and the second arc-shaped block are attached to the outer wall of the first cylinder, and the plurality of first arc-shaped blocks and the second arc-shaped blocks can form a ring structure enveloping the first cylinder and the second cylinder.

2. The pre-preg re-manufacturing waste material powdering recycling molding system according to claim 1, wherein, a driving motor being installed on the side of the cabinet body, and the output shaft of the driving motor being connected with the vertical shaft through a second belt.

3. The pre-preg re-manufacturing waste material powdering recycling molding system according to claim 1, characterized in that, the intermittent ejection mechanism comprising a rotating structure connected with the vertical shaft and a reciprocating structure matched with the rotating structure, the reciprocating structure being connected with the sieve disc, the rotating structure being synchronously rotated with the vertical shaft and being capable of promoting the reciprocating structure to store and release elastic potential energy, and when the reciprocating structure releases the elastic potential energy, the sieve disc can throw the material upward.

4. The pre-preg re-manufacturing waste material powdering recycling molding system according to claim 3, characterized in that, the rotating structure comprising a gear ring rotatably installed on the bottom wall of the cabinet body and a gear, the gear being engaged with the gear ring, and the rotating shaft of the gear being connected with the vertical shaft through a first belt, and a driving wheel being installed on the gear ring and being matched with the reciprocating structure.

5. The pre-preg recycled waste material powder crushing recycling molding system according to claim 4, wherein, the reciprocating structure comprising a plurality of elastic members arranged in the cabinet body and a follower connected with the plurality of elastic members, the elastic members being connected with the sieve disc, and the follower being matched with the driving wheel.

6. The pre-preg recycled waste material powder crushing recycling molding system according to claim 5, wherein, the elastic member comprising a vertical cylinder arranged in the cabinet body and a vertical rod fixed with the sieve disc and penetrating through the vertical cylinder, the vertical rod being slidably connected with the vertical cylinder, and a convex ring being slidably arranged in the vertical cylinder and being fixed with the vertical rod. The spring is sleeved on the outer periphery of the vertical rod, and two ends of the spring abut against the inner wall of the vertical cylinder and the convex ring respectively.

7. The pre-preg recycled waste material powdering and recycling molding system according to claim 6, wherein, The driven part comprises a connecting ring fixedly connected to the end of the vertical rod away from the sieve disc and a driven ring arranged below the connecting ring through a plurality of connecting arms, and an outer wall of the driven ring is provided with a plurality of trapezoidal grooves, and both sides of each groove are respectively formed with an inclined surface and a vertical surface.

8. A prepreg production process using the waste material powder crushing recycling molding system according to claim 1, characterized in that, The method comprises the following steps: Step one, pretreatment, collecting, classifying and removing impurities of waste recycling pre-impregnated material; Step two, crushing treatment, the waste recycling pre-impregnated material after pretreatment is crushed by the crushing unit to form powdery particle recycling material; Step three, mixing modification, the powdery particle recycling material after crushing is mixed with resin powder, film material and additives by the mixing modification unit; Step four, the particle after mixing modification is molded by molding to form a standard board product with a predetermined size, and the secondary production application of the waste recycling pre-impregnated material is completed.

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