Waste material crushing, recycling and forming system for prepreg reproduction and production process of waste material crushing, recycling and forming system

Abstract

The invention relates to the technical field of plastic waste recycling, in particular to a waste crushing, recycling and forming system for prepreg reproduction and a production process thereof, and the waste crushing, recycling and forming system comprises a crushing unit, a mixing and modifying unit and a forming unit; the crushing unit comprises a cabinet body; the first barrel body and the second barrel body are arranged on the cabinet body, a gap is reserved between the first barrel body and the second barrel body, a plurality of blades which are distributed at equal intervals along the circumference are arranged in the first barrel body, the blades can be driven to rotate by a vertical shaft which is rotationally arranged in the cabinet body, and the plurality of blades are further respectively connected with a group of displacement driving mechanisms; the sieve tray is positioned below the blade and is connected with a discontinuous ejection mechanism mounted in the cabinet body; through the combination of the up-and-down reciprocating motion of the sieve tray and the elastic effect of the spring, materials which stay on the sieve tray and are not effectively cut can obtain extra kinetic energy, the chance that the materials make contact with the blades is increased, therefore, residues of the materials on the sieve tray are reduced, and the thoroughness of smashing treatment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic waste recycling, in particular to a waste material crushing and recycling molding system for prepreg re-production and a production process thereof. Background Art

[0002] Prepreg is a composite material primarily composed of a plastic matrix, such as resin, and reinforcing fibers. If the plastic component is directly landfilled after use, it will occupy land for a long time and will be difficult to degrade, causing soil pollution. If incinerated, it will release toxic and harmful gases, such as dioxins, which seriously pollute the atmosphere. Therefore, pulverizing and recycling the plastic component in prepreg is essential to not only reduce environmental pollution but also achieve resource recycling.

[0003] When crushing waste materials, in some existing crushing equipment, the screen plate is usually set below the blade to control the particle size of the crushed material. If the distance is too large, the material that has not been crushed to the required particle size may remain between the blade and the screen plate, and this part of the material can no longer be cut by the blade, which will cause material accumulation problems and prevent the material from being discharged normally; if the blade is in contact with the screen plate, although the problem of material residue can be solved, the blade will continue to rub and collide with the screen plate during rotation, which will accelerate the wear of the blade and may even cause damage to the blade such as deformation and cracking. In response to this, some equipment will make 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 smaller size, they may still stay in this gap and cannot be effectively cut by the blade, resulting in material residue. The problem is still difficult to be effectively solved. In actual work, staff are often required to shut down the machine regularly for processing. Summary of the Invention

[0004] The purpose of the present invention is to provide a waste material crushing and recycling molding system and a production process for reproducing prepregs, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: The waste material crushing and recycling molding system for prepreg re-production includes a crushing unit, a mixing and modification unit, and a molding unit; The crushing unit includes: Cabinet; A first cylinder and a second cylinder are provided on the cabinet, with a gap reserved between the first cylinder and the second cylinder. A plurality of blades are provided in the first cylinder, which are equidistantly distributed along the circumference. The blades can be driven to rotate by a vertical shaft rotatably installed in the cabinet. The plurality of blades are also connected to a set of shift drive mechanisms. The shift drive mechanisms can drive the blades to move radially along the first cylinder and extend out of the gap, so that the plurality of blades are switched from a closed state to an open state. The sieve plate is slidably arranged in the first cylinder, located below the blade, and connected to the intermittent ejection mechanism installed in the cabinet. The intermittent ejection mechanism is connected to the vertical shaft, which can drive the sieve plate to rise and fall, so that the material on the sieve plate is ejected upward.

[0006] As a further solution of the present invention: a drive motor is installed on the side of the cabinet, and the output shaft of the drive motor is connected to the vertical shaft through a second belt. A plurality of guide columns are fixed on the vertical shaft at equal intervals along the circumference, and the guide columns are perpendicular to the vertical shaft, and the blade is slidably arranged on the guide columns.

[0007] As a further solution of the present invention: the shift drive mechanism includes a telescopic structure arranged on the outer wall of the first cylinder and an enclosing structure connected to the telescopic structure, the telescopic structure includes a guide arm arranged on the outer wall of the first cylinder and a sliding arm slidingly fitted with the guide arm, the outer wall of the first cylinder is also hinged with a cylinder, and the movable end of the cylinder is hinged to the sliding arm.

[0008] As a further embodiment of the present invention, the enclosing structure includes a first arc-shaped block provided on the sliding arm, the inner wall of the first arc-shaped block is provided with a groove, and a second arc-shaped block is slidably engaged in the groove, and the blade passes through the groove and is fixed to the second arc-shaped block; When the multiple blades are in a closed state, the inner walls of the first arc block and the second arc block fit with the outer wall of the first cylinder, and the multiple first arc blocks and the second arc blocks can form an annular structure that encloses the first cylinder and the second cylinder.

[0009] As a further solution of the present invention: the intermittent ejection mechanism includes a rotating structure connected to the vertical shaft and a reciprocating structure coordinated with the rotating structure, the reciprocating structure is connected to the sieve plate, the rotating structure rotates synchronously with the vertical shaft, and can prompt the reciprocating structure to store and release elastic potential energy. When the reciprocating structure releases the elastic potential energy, it can prompt the sieve plate to throw the material upward.

[0010] As a further solution 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 is engaged with the gear ring, and the rotating shaft of the gear is connected to the vertical shaft through a first belt, and a driving wheel is installed on the gear ring to cooperate with the reciprocating structure.

[0011] As a further solution of the present invention: the reciprocating structure includes multiple groups of elastic members arranged in the cabinet and driven members connecting the multiple groups of elastic members, the elastic members are connected to the sieve plate, and the driven members cooperate with the driving wheel.

[0012] As a further solution of the present invention: the elastic member includes a vertical cylinder arranged in the cabinet body and a vertical rod fixed to the sieve plate and passing through the vertical cylinder, the vertical rod is slidably connected to the vertical cylinder, and a convex ring fixed to the vertical rod is slidably provided in the vertical cylinder; The vertical cylinder is further provided with a spring sleeved on the outer periphery of the vertical rod, the two ends of the spring respectively abut against the inner wall of the vertical cylinder and the convex ring, and the end of the vertical rod away from the sieve plate is connected to the follower.

[0013] As a further solution of the present invention: the follower includes a connecting ring fixedly connected to the vertical rod away from one end of the sieve plate and a driven ring arranged below the connecting ring through a plurality of connecting arms, the outer wall of the driven ring is provided with a plurality of trapezoidal grooves, and an inclined surface and a vertical surface are formed on both sides of the groove.

[0014] The prepreg re-production process, using the waste material crushing and recycling molding system, includes the following steps: Step 1: Pretreatment: collecting, sorting and removing impurities from the waste recycled prepreg; Step 2: crushing treatment, the crushing unit crushes the pretreated waste recycled prepreg to form a powdered recycled material with 20mm particles; Step 3: Mixing and modification: The mixing and modification unit mixes the crushed powdered particle recycling material with resin powder, film material, and additives; Step 4: The mixed and modified particles are molded into standard sheet products of predetermined sizes, completing the secondary production application of the waste recycled prepreg.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses the up and down reciprocating motion of the sieve plate combined with the elastic action of the spring to enable the material that has not been effectively cut to obtain additional kinetic energy on the sieve plate, prompting it to move toward the blade, thereby increasing the chance of contact between the material and the blade, thereby reducing the material residue on the sieve plate, improving the thoroughness of the crushing process, and making reasonable use of the inertia of the material. While avoiding the wear problem caused by the contact between the blade and the sieve plate, it also effectively avoids the problem of material residue and insufficient crushing process caused by the gap between the blade and the sieve plate; Secondly, the upward projection of the material by the sieve disc helps the blade to effectively cut the material at different heights. At the same time, the reciprocating motion of the sieve disc shakes the material, promoting the material that has been crushed to the required particle size to pass smoothly through the sieve holes on the sieve disc, thereby enhancing the overall crushing effect and screening efficiency. In addition, multiple blades are arranged 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 the blades need to be maintained or cleaned, the cylinder drives the blades to move outward so that they extend to the outside of the first cylinder through the gap between the first cylinder and the second cylinder. 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 are in the open state, the first arc block can effectively limit the second arc block to prevent the second arc block and the blades from rotating, thereby ensuring that the blades remain stationary and are reliably locked during maintenance, effectively improving the safety and convenience of maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of an embodiment of a waste material crushing and recycling molding system for reproducing prepreg.

[0017] Figure 2 A structural schematic diagram from another angle of an embodiment of a waste material crushing and recycling molding system for the reproduction of prepreg materials.

[0018] Figure 3 A structural schematic diagram from another angle of an embodiment of a waste material crushing and recycling molding system for reproducing prepreg.

[0019] Figure 4 A schematic diagram of the internal structure of a cabinet in one embodiment of a waste material crushing and recycling molding system for reproducing prepreg.

[0020] Figure 5 This is a structural schematic diagram from another angle inside the cabinet of one embodiment of a waste material crushing and recycling molding system for reproducing prepreg materials.

[0021] Figure 6 for Figure 4 A magnified view of the structure at point A in the middle.

[0022] Figure 7 A schematic diagram of the retracted state of multiple blades in one embodiment of a waste material crushing and recycling molding system for reproducing prepreg materials.

[0023] Figure 8 A schematic diagram of the connection between the sieve plate and the intermittent ejection mechanism in one embodiment of a waste material crushing and recycling molding system for prepreg reproduction.

[0024] Figure 9 for Figure 8 Schematic diagram of the structure from another angle.

[0025] Figure 10 A schematic structural diagram of a displacement drive mechanism in one embodiment of a waste material crushing and recycling molding system for prepreg reproduction.

[0026] Figure 11 An exploded diagram of the structure of the shift drive mechanism in one embodiment of a waste material crushing and recycling molding system for prepreg reproduction.

[0027] Figure 12 A schematic diagram of the turning direction of the blade in one embodiment of a waste material crushing and recycling molding system for reproducing prepreg materials.

[0028] In the figure: 1. cabinet; 2. first cylinder; 3. second cylinder; 4. gap; 5. 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. sieve 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. unloading chute. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In addition, when an element in the present invention is referred to as being "disposed on" or "positioned on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiment.

[0031] See also Figures 1-12 In the embodiment of the present invention, the waste material crushing and recycling molding system for prepreg re-production includes a crushing unit, a mixing and modifying unit and a molding unit; The crushing unit includes: Cabinet 1; A first cylinder 2 and a second cylinder 3 are provided on the cabinet 1, with a gap 4 reserved between the first cylinder 2 and the second cylinder 3. A plurality of blades 13 are provided in the first cylinder 2, which are equidistantly distributed along the circumference. The blades 13 can be driven to rotate by a vertical shaft 7 rotatably installed in the cabinet 1. The plurality of blades 13 are also each connected to a set of shift drive mechanisms. The shift drive mechanisms can drive the blades 13 to move radially along the first cylinder 2, extending out of the gap 4, and the plurality of blades 13 are switched from a closed state to an open state. The sieve plate 15 is slidably arranged 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, which can drive the sieve plate 15 to rise and fall, so that the material on the sieve plate 15 is ejected upward.

[0032] It should be noted that the crushing unit is responsible for crushing the waste prepreg to a certain particle size range, which is a key link in the entire recycling molding system and provides particles of suitable particle size for subsequent processing. The mixing and modification unit mixes the particles with resin powder, additives, etc., and performs modification treatment as needed to give the material specific properties to meet the requirements of molded products in different application scenarios; The molding unit is used to make new products from the mixed and modified particles through compression molding or injection molding, and is the final step in realizing the recycling of waste prepregs.

[0033] Secondly, a hopper 5 is fixed to the upper part of the second cylinder 3, and the hopper 5 is fixed to the cabinet 1 through two supporting arms 28; The size of the sieve holes on the sieve plate 15 is designed according to 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 provided in the cabinet 1, and a discharge chute 30 is provided on one side of the cabinet 1. The inclined plate 29 is inclined downward toward the discharge chute 30. As the blade 13 rotates, the material located in the first cylinder 2 can be cut and crushed, and the material that meets the strength standard falls onto the inclined plate 29 through the sieve holes on the sieve plate 15, and then slides out along the inclined plate 29 and the discharge chute 30 in turn for collection. The vertical shaft 7 passes through the inclined plate 29 and is sealed and rotatably connected to the inclined plate 29.

[0034] See also Figure 12Furthermore, the blade 13's edge is tilted upward, making it easier for the blade 13 to cut into the material during rotation. Specifically, the blade lifts the material upward during rotation, leveraging the material's weight and inertia to make it easier for the blade 13 to grasp and shear it. This effectively improves the handling of softer or more ductile materials, such as partially cured prepreg waste, by preventing the material from sliding on the blade 13, thereby increasing crushing efficiency.

[0035] Please refer again Figure 7 and Figure 11 A drive motor 6 is mounted 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. A plurality of guide posts 8 are fixedly mounted on the vertical shaft 7 at equal intervals along the circumference. The guide posts 8 are perpendicular to the vertical shaft 7, and the blade 13 is slidably mounted on the guide posts 8. The shift drive mechanism includes a telescopic structure mounted on the outer wall of the first cylinder 2 and an enclosing structure connected to the telescopic structure. The telescopic structure includes a guide arm 9 mounted on the outer wall of the first cylinder 2 and a sliding arm 10 that slides with the guide arm 9. A cylinder 14 is also hingedly mounted on the outer wall of the first cylinder 2, and the movable end of the cylinder 14 is hingedly mounted on the sliding arm 10.

[0036] It should be emphasized that in actual processing, with long-term use, the blade 13 will gradually wear out due to continuous cutting of materials, and the blade edge will become blunt, which will reduce the crushing efficiency and increase the energy consumption of the equipment. In addition, some components in the material may adhere to the blade 13. In particular, for some sticky materials or prepreg waste containing components such as resin and glue, it is easy to form an adhesion layer on the surface of the blade 13, affecting the cutting performance of the blade 13. The blade 13 needs to be cleaned and maintained regularly to restore the sharpness of the blade. When the blade 13 needs to be maintained, the movable end of the cylinder 14 extends, thereby driving the sliding arm 10 to slide on the guide arm 9 away from the first cylinder 2. Accordingly, the sliding arm 10 drives the blade 13 through the gap 4 toward the outside of the first cylinder 2 through the surrounding structure. Multiple blades 13 perform an expansion action and are eventually moved out of the first cylinder 2. Then, the staff can start the maintenance work of the blade 13.

[0037] The enclosing structure includes a first arc block 11 arranged on the sliding arm 10, the inner wall of the first arc block 11 is provided with a groove, and the second arc block 12 is slidably engaged in the groove, and the blade 13 passes through the gap 4 and is fixed to the second arc block 12; when the multiple blades 13 are in a closed state, the inner walls of the first arc block 11 and the second arc block 12 are in contact with the outer wall of the first cylinder 2, and the multiple first arc blocks 11 and the second arc blocks 12 can form an annular structure that encloses the first cylinder 2 and the second cylinder 3.

[0038] When the blades 13 need to be maintained, the cylinder 14 drives the sliding arm 10 to move away from the first cylinder 2. Accordingly, the first arc block 11 drives the second arc block 12 to move away from the first cylinder 2. The second arc block 12 pulls the blades 13 on the guide column 8 through the gap 4 to the outside of the first cylinder 2. The multiple blades 13 are switched from the retracted state inside the first cylinder 2 to the open state outside the first cylinder 2. In this way, the position control function of the blades 13 is realized. 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 block 11 and the second arc block 12 are fitted 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.

[0039] A plurality of 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 the cylinder 14. When the blades 13 need to be maintained or cleaned, the cylinder 14 drives the blades 13 to move outward, so that they extend to the outside 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 removal steps in traditional crushers, provides a spacious operating space for maintenance work, and significantly reduces the difficulty of maintenance. In addition, when the plurality of 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 are reliably locked during the maintenance process, effectively improving the safety and convenience of maintenance work; Specifically, some existing blades 13 are usually fixed in position, that is, they are always located in the crushing chamber. During maintenance, workers often need to remove some parts, which makes the overall operation process more complicated. In addition, some blades 13 may be located in a relatively small space, which may easily lead to inconvenience in operation. If the operation is not careful, the worker may be easily scratched by the blade 13. During the crushing process, the drive motor 6 drives the vertical shaft 7 to rotate through the second belt 27, and then the vertical shaft 7 drives the blade 13 to rotate in the first cylinder 2 through the guide column 8. Correspondingly, the blade 13 will drive the second arc block 12 and the first arc block 11 to slide relative to each other. Among them, since the guide column 8 and the second arc block 12 are both connected to the blade 13, compared with the conventional installation method of the blade 13 (that is, only one end of the blade 13 is directly fixed to its drive shaft), this unique design can make the blade 13 more evenly stressed during the rotation process, and the torque can be effectively dispersed, thereby significantly improving the rotational stability of the blade 13, enhancing its structural strength, reducing the vibration and deformation of the blade 13 during high-speed rotation and cutting materials, extending the service life of the blade 13, improving the crushing efficiency and quality, and ensuring that the equipment can maintain an efficient and stable operating state when processing tough materials such as waste prepregs.

[0040] Please refer again Figure 7 The intermittent ejection mechanism includes a rotating structure connected to the vertical shaft 7 and a reciprocating structure coordinated with the rotating structure. The reciprocating structure is connected to the sieve plate 15. The rotating structure rotates synchronously with the vertical shaft 7 and can prompt the reciprocating structure to store and release elastic potential energy. When the reciprocating structure releases the elastic potential energy, it can prompt the sieve plate 15 to throw the material upward.

[0041] Please refer again Figure 8 and Figure 9 The 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 rotating shaft of the gear 24 is connected to the vertical shaft 7 via a first belt 25. A driving wheel 26 that cooperates with the reciprocating structure is mounted on the gear ring 23. The reciprocating structure includes multiple sets of elastic members disposed within the cabinet 1 and a driven member connected to the multiple sets of elastic members. The elastic members are connected to the sieve plate 15, and the driven member cooperates with the driving wheel 26. The elastic member includes a vertical cylinder 16 arranged in the cabinet 1 and a vertical rod 17 fixed to the sieve plate 15 and passing through the vertical cylinder 16. The vertical rod 17 is slidably connected to the vertical cylinder 16, and a convex ring 18 fixed to the vertical rod 17 is slidably provided in the vertical cylinder 16; a spring 19 is also provided in the vertical cylinder 16 and is sleeved on the outer periphery of the vertical rod 17. The two ends of the spring 19 respectively abut the inner wall of the vertical cylinder 16 and the convex ring 18. The end of the vertical rod 17 away from the sieve plate 15 is connected to the follower.

[0042] It should be noted that the vertical rod 17 passes through the inclined plate 29 and is sealed and slidably connected to the inclined plate 29.

[0043] The follower includes a connecting ring 20 fixedly connected to the end of the vertical rod 17 away from the sieve plate 15 and a driven ring 22 arranged below the connecting ring 20 through multiple connecting arms 21. The outer wall of the driven ring 22 is provided with multiple trapezoidal grooves, and an inclined surface 2201 and a vertical surface 2202 are respectively formed on both sides of the groove.

[0044] During operation, the vertical shaft 7 drives the gear 24 to rotate via the first belt 25, and the gear 24 drives the gear ring 23 to rotate, causing the driving wheel 26 to make a circular motion. When the driving wheel 26 contacts the inclined surface 2201, the driven ring 22 is prompted to give way downward. Accordingly, the driven ring 22 drives the vertical rod 17 downward via the connecting arm 21 and the connecting ring 20, and the spring 19 is compressed, causing the sieve plate 15 to move downward a certain distance in the first cylinder 2. After the driving wheel 26 is separated from the upper end surface of the driven ring 22, the spring 19 will rebound instantly because the vertical surface 2202 is a vertical plane. By utilizing the characteristic of rapid rebound, the sieve plate 15 can be quickly lifted and reset. It should be noted that the Figure 7 Take the state shown as an example. At this time, the sieve plate 15 is in the highest position, the convex ring 18 abuts against the inner wall of the upper end of the vertical cylinder 16, and the spring 19 is subsequently compressed. During the rebound process, the convex ring 18 will move up and reset at a relatively fast speed, and the material on the sieve plate 15 will be thrown upward due to inertia. The material that is crushed to a suitable strength can be further cut by the blade 13; The setting of the rotating structure plays a role in speed change. Specifically, during actual processing, the rotation speed of the blade 13 is very fast, but the rebound of the spring 19 takes time, that is, the process of the sieve plate 15 ejecting the material takes time. In order to ensure that this process is completed completely and smoothly, the speed of the circular motion of the driving wheel 26 should not be too fast, and the gear 24 and the gear ring 23 can play an effective deceleration role.

[0045] The present invention uses the up and down reciprocating motion of the sieve plate 15 in combination with the elastic action of the spring 19 to enable the material that has not been effectively cut and remains on the sieve plate 15 to obtain additional kinetic energy, thereby prompting it to move toward the blade 13, thereby increasing the chance of the material contacting the blade 13, thereby reducing the material residue on the sieve plate 15, improving the thoroughness of the crushing process, and rationally utilizing the inertia of the material. There is no need to make the distance between the sieve plate 15 and the blade 13 too small or to make the blade 13 contact the sieve plate 15, thereby effectively avoiding the problem of wear of the blade 13; Furthermore, the upward projection of the material by the sieve disc 15 helps the blade 13 to effectively cut the material at different heights. Simultaneously, the reciprocating motion of the sieve disc 15 shakes the material, promoting the smooth passage of the material, once crushed to the required particle size, through the sieve holes of the sieve disc 15, thereby enhancing the overall crushing effect and screening efficiency.

[0046] It should be noted that in order to fully utilize the advantages of pulverization and maintain stable operation, controlling the feed rate is a crucial factor. Specifically, the up and down reciprocating motion of the screen plate 15 and the instantaneous rebound force of the spring 19 are used to allow the ineffectively cut material on the screen plate 15 to reach the height of the blade 13 by inertia, thereby being further cut. However, if too much material accumulates in the first cylinder 2 and the second cylinder 3, the movement amplitude and inertia of the screen plate 15 will be affected, thereby reducing the overall pulverization performance. Therefore, in actual operation, the operating speed of the waste material conveyor belt arranged above the feed hopper 5 should not be too high, and a relatively appropriate feed rate must be maintained.

[0047] As another embodiment of the present invention, a prepreg re-production process is also proposed, which uses the waste material crushing and recycling molding system, including the following steps: Step 1: Pretreatment: collecting, sorting and removing impurities from the waste recycled prepreg; Step 2: crushing treatment, the crushing unit crushes the pretreated waste recycled prepreg to form a powdered recycled material with 20mm particles; Step 3: Mixing and modification: The mixing and modification unit mixes the crushed powdered particle recycling material with resin powder, film material, and additives; Step 4: The mixed and modified particles are molded into standard sheet products of predetermined sizes, completing the secondary production application of the waste recycled prepreg.

[0048] The production raw materials in the present invention include 20mm particles, which are recycled materials obtained by cutting or crushing recycled prepregs. Standard plates are made by molding powdered waste materials and films or resin powders, thereby realizing the secondary application of waste prepregs.

[0049] 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 embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0050] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. The waste material crushing and recycling molding system for prepreg re-production includes a crushing unit, a mixing and modification unit, and a molding unit; It is characterized by: The crushing unit includes: Cabinet; A first cylinder and a second cylinder are provided on the cabinet, with a gap reserved between the first cylinder and the second cylinder. A plurality of blades are provided in the first cylinder, which are equidistantly distributed along the circumference. The blades can be driven to rotate by a vertical shaft rotatably installed in the cabinet. The plurality of blades are also connected to a set of shift drive mechanisms. The shift drive mechanisms can drive the blades to move radially along the first cylinder and extend out of the gap, so that the plurality of blades are switched from a closed state to an open state. The sieve plate is slidably arranged in the first cylinder, located below the blade, and connected to the intermittent ejection mechanism installed in the cabinet. The intermittent ejection mechanism is connected to the vertical shaft, which can drive the sieve plate to rise and fall, so that the material on the sieve plate is ejected upward.

2. The waste material crushing and recycling molding system for prepreg re-production according to claim 1 is characterized in that: A drive motor is installed on the side of the cabinet, and the output shaft of the drive motor is connected to the vertical shaft through a second belt. A plurality of guide columns are fixed on the vertical shaft at equal intervals along the circumference. The guide columns are perpendicular to the vertical shaft, and the blade is slidably arranged on the guide columns.

3. The waste material crushing and recycling molding system for prepreg re-production according to claim 1 is characterized in that: The shift drive mechanism includes a telescopic structure arranged on the outer wall of the first cylinder and a surrounding structure connected to the telescopic structure. The telescopic structure includes a guide arm arranged on the outer wall of the first cylinder and a sliding arm slidingly fitted with the guide arm. The outer wall of the first cylinder is also hinged with a cylinder, and the movable end of the cylinder is hinged to the sliding arm.

4. The waste material crushing and recycling molding system for prepreg re-production according to claim 3 is characterized in that: The enclosing structure includes a first arc-shaped block provided on the sliding arm, the inner wall of the first arc-shaped block is provided with a groove, and a second arc-shaped block is slidably engaged in the groove, and the blade passes through the gap and is fixed to the second arc-shaped block; When the multiple blades are in a closed state, the inner walls of the first arc block and the second arc block fit with the outer wall of the first cylinder, and the multiple first arc blocks and the second arc blocks can form an annular structure that encloses the first cylinder and the second cylinder.

5. The waste material crushing and recycling molding system for prepreg re-production according to claim 1 is characterized in that: The intermittent ejection mechanism includes a rotating structure connected to the vertical shaft and a reciprocating structure coordinated with the rotating structure. The reciprocating structure is connected to the sieve plate. The rotating structure rotates synchronously with the vertical shaft and can prompt the reciprocating structure to store and release elastic potential energy. When the reciprocating structure releases the elastic potential energy, it can prompt the sieve plate to throw the material upward.

6. The waste material crushing and recycling molding system for prepreg re-production according to claim 5 is characterized in that: The rotating structure includes a gear ring and a gear rotatably mounted on the bottom wall of the cabinet. The gear is engaged with the gear ring, and the rotating shaft of the gear is connected to the vertical shaft through a first belt. A driving wheel that cooperates with the reciprocating structure is installed on the gear ring.

7. The waste material crushing and recycling molding system for prepreg re-production according to claim 6 is characterized in that: The reciprocating structure includes a plurality of elastic members arranged in the cabinet and a driven member connected to the plurality of elastic members. The elastic members are connected to the sieve tray, and the driven member cooperates with the driving wheel.

8. The waste material crushing and recycling molding system for prepreg re-production according to claim 7 is characterized in that: The elastic member includes a vertical cylinder arranged in the cabinet and a vertical rod fixed to the sieve plate and passing through the vertical cylinder, the vertical rod is slidably connected to the vertical cylinder, and a convex ring fixed to the vertical rod is slidably provided in the vertical cylinder; The vertical cylinder is further provided with a spring sleeved on the outer periphery of the vertical rod, the two ends of the spring respectively abut against the inner wall of the vertical cylinder and the convex ring, and the end of the vertical rod away from the sieve plate is connected to the follower.

9. The waste material crushing and recycling molding system for prepreg re-production according to claim 8 is characterized in that: The follower includes a connecting ring fixedly connected to the end of the vertical rod away from the sieve plate and a driven ring arranged below the connecting ring through multiple connecting arms. The outer wall of the driven ring is provided with multiple trapezoidal grooves, and an inclined surface and a vertical surface are formed on both sides of the groove.

10. A prepreg re-production process, using the waste material crushing and recycling molding system as claimed in claim 1, characterized in that: The following steps are involved: Step 1: Pretreatment: collecting, sorting and removing impurities from the waste recycled prepreg; Step 2: crushing treatment, the crushing unit crushes the pretreated waste recycled prepreg to form powdered particle recycled material; Step 3: Mixing and modification: The mixing and modification unit mixes the crushed powdered particle recycling material with resin powder, film material, and additives; Step 4: The mixed and modified particles are molded into standard sheet products of predetermined sizes, completing the secondary production application of the waste recycled prepreg.

Images