Bamboo-plastic composite material manufacturing device and method thereof

Abstract

The application discloses a bamboo-plastic composite material manufacturing device and a method thereof. The device comprises a lower frame, a top end of the lower frame is provided with a banburying machine body, a top end of a lower frame on one side of the banburying machine body is provided with a rotary bracket, an inside of the rotary bracket is provided with a trapezoidal discharging box connected with a feeding port of the banburying machine body, and a top end of the trapezoidal discharging box is provided with a double-disc multi-arm grinding device for grinding and sieving the crushed materials. The device can realize the multiple processing links and material processing functions in one device, and the double-disc multi-arm grinding device and the middle crushing shaft are driven by a speed reduction motor, a telescopic spline bidirectional transmission assembly, and work, so that the number and types of different types of equipment can be greatly reduced, the equipment investment and use cost can be reduced, the gap period of material transfer can be reduced, and the processing speed of the materials in the production process can be greatly increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bamboo-plastic composite material manufacturing, in particular to a bamboo-plastic composite material manufacturing device and method. BACKGROUND

[0002] The internal mixer is mainly used for uniform mixing, heating and melting of bamboo fibers and plastic matrix in the production of bamboo-plastic composite materials, and ensures good dispersion of bamboo fibers in the plastic matrix. The internal mixer generates shear force and friction force through high-speed rotating rotor, so that the bamboo fibers and plastic matrix are fully fused, avoiding the aggregation of bamboo fibers and improving the strength and surface quality of the material. In addition, the internal mixer provides sufficient heat through the heating device to make the plastic matrix reach the melting state, and removes excess moisture or volatile substances through the exhaust device. The structure of the internal mixer usually includes a body, a rotor, a heating system, a feeding and exhaust device, and the core component is the rotor. Common rotor types include screw belt type, cone type and star type, which are suitable for different processing needs. When the rotor rotates, the generated shear force and friction force make the material mix efficiently, ensuring the full contact and combination of plastic and bamboo fibers, thereby optimizing the mechanical properties of the composite material.

[0003] As disclosed in the authorized announcement No. CN114507453B, a kind of high-strength bamboo plastic composite for container floor, which discloses the preparation method of high-strength bamboo plastic composite for container floor, polyethylene resin, recycled plastic and polyvinyl butyral are mixed and stirred for 5 min, then modified bamboo powder and coupling agent are added, stirred for 5-10 min, dried at 100±5°C for 2h to obtain a preliminary mixture, the above-mentioned preliminary mixture, compatibilizer, lubricant, anti-aging agent are sequentially added into high-speed mixer and mixed for 10-20 min, the mixing temperature is 120-130°C, then directly introduced into double-screw extruder for extrusion granulation, wherein the extruder temperature is 150-185°C, and the screw rotation speed is 40-50r / min, to obtain the high-strength bamboo plastic composite, the above technical solution is to use high-speed mixer, internal mixer, double-screw extruder and other equipment to manufacture bamboo plastic composite material, but before supplying recycled plastic particles to the internal mixer, the recycled PE material needs to be ground to 30 mesh or more to increase the composite strength of plastic and bamboo fiber, so as to continue to add bamboo fiber and related additives for mixing and granulation, therefore, the recycled PE material needs to be treated by crusher, grinding machine, screening machine and other equipment, and the crushing and grinding equipment needs higher purchase cost, especially when processing a large amount of recycled PE, since the properties of recycled plastic are more complex and heterogeneous, special designed equipment is needed for treatment, and the crushing and grinding process of recycled PE is a time-consuming step, especially when processing hard or thick plastic particles, material transfer between multiple devices may be needed for crushing and refining, which not only prolongs the production cycle, but also causes the production line bottleneck. SUMMARY

[0004] The purpose of the present application is to provide a bamboo plastic composite material manufacturing device and method, which sequentially arranges a material collecting box, an I-shaped material crushing box, a double-disc multi-arm grinding device and a trapezoidal discharging box above the feeding port of the internal mixer body, when the double-disc multi-arm grinding device is driven by the reduction motor, the double-disc multi-arm grinding device transmits rotary power to the middle crushing shaft in the material collecting box through the telescopic spline bidirectional transmission assembly, so that the middle crushing shaft preliminarily crushes the recycled PE material, and then the recycled PE material enters the double-disc multi-arm grinding device for grinding until it is ground to 30 mesh or more, and related additives can be gradually added during the crushing and grinding process, so that the ground and mixed recycled PE material and related additives enter the internal mixer body, to solve the problems in the above background art.

[0005] To achieve the above purpose, the present application provides the following technical solution: a bamboo plastic composite material manufacturing device, comprising:

[0006] The lower frame is provided with a top end of a mixer body, and a rotary bracket is arranged on one side of the top end of the mixer body, and a trapezoidal discharge box connected with the feeding port of the mixer body is arranged in the rotary bracket, and a double-disc multi-arm grinding device for grinding and sieving the crushed materials is arranged on the top end of the trapezoidal discharge box, a reduction motor for driving the double-disc multi-arm grinding device to work is arranged on one side of the outer wall of the rotary bracket, and a control box is arranged on one side of the outer wall of the lower frame, and the output end of the control box is electrically connected with the input end of the reduction motor.

[0007] The I-shaped material box is fixed on the top end of the double-disc multi-arm grinding device, and the discharge port at the bottom end of the I-shaped material box is connected with the feeding port of the double-disc multi-arm grinding device, and the front and rear sides of the interior of the I-shaped material box are rotatably provided with side-arranged material crushing rollers, and a material collecting box is arranged in the interior of the I-shaped material box, and a centrally-arranged material crushing shaft is rotatably arranged in the interior of the material collecting box and located above the two side-arranged material crushing rollers, and a lead screw distance adjusting structure for controlling the height of the centrally-arranged material crushing shaft is arranged on the outer walls of the two sides of the I-shaped material box, and a right-angle frame is arranged on the moving end of one of the lead screw distance adjusting structures, and a telescopic spline bidirectional transmission assembly for connecting the double-disc multi-arm grinding device and the centrally-arranged material crushing shaft is arranged on one side of the inner wall of the right-angle frame.

[0008] Preferably, the double-disc multi-arm grinding device comprises a grinding material box fixed on the top end of the trapezoidal discharge box, an arc-shaped sieve core fixed in the interior of the grinding material box, a main transmission shaft rotatably arranged in the interior of the grinding material box, and support discs fixed on the surface of the two ends of the main transmission shaft, one end of the main transmission shaft is fixedly connected with the output shaft of the reduction motor, a gap part connected with the interior cavity of the trapezoidal discharge box is arranged between the arc-shaped sieve core and the grinding material box, a plurality of equidistant transverse arms are arranged between the adjacent two support discs, and a material scraping knife is arranged on one side of the outer wall of the transverse arm away from the central axis of the main transmission shaft.

[0009] Preferably, the material scraping knife extends in a wave shape along the extension direction of the transverse arm, bearing seats two are arranged on the two sides of the top end of the rotary bracket, the main transmission shaft is rotatably arranged between the two bearing seats two, and the central axes of the bearing seats two and the arc-shaped sieve core coincide with each other.

[0010] Preferably, the top end of the arc-shaped sieve core is provided with an opening part for the materials to enter, and the support discs, the transverse arms and the material scraping knives are all made of stainless steel components.

[0011] Preferably, the telescopic spline bidirectional transmission assembly comprises a lower right-angle shaft support fixed on the outer wall of one side of the rotary bracket, an upper right-angle shaft support fixed on the inner wall of one side of the right-angle support, an inner spline shaft rotatably installed at the bottom of the right-angle support, and an outer spline shaft rotatably installed at the top end of the lower right-angle shaft support, wherein the top end of the outer spline shaft extends into the inner spline shaft, the inner part of the upper right-angle shaft support is provided with a second bevel gear transmission structure for keeping the middle material crushing shaft and the power connection of the opposite ends of the inner spline shaft, and the inner part of the lower right-angle shaft support is provided with a first bevel gear transmission structure for connecting the main transmission shaft and the opposite ends of the outer spline shaft.

[0012] Preferably, the first bevel gear transmission structure and the second bevel gear transmission structure have the same structure, the first bevel gear transmission structure is composed of a driving bevel gear and a driven bevel gear, the driving bevel gear is rotatably installed on the inner wall of one side of the lower right-angle shaft support, the driven bevel gear is rotatably installed on the top wall of the lower right-angle shaft support, the bottom end of the outer spline shaft extends into the inner part of the lower right-angle shaft support and is connected with the driven bevel gear, and one end of the main transmission shaft extends into the inner part of the lower right-angle shaft support and is connected with the driving bevel gear.

[0013] Preferably, the screw rod distance adjusting structure comprises a threaded shaft rotatably installed on one side of the bottom end of the I-shaped material crushing box and a U-shaped seat slidably installed on the outer wall of one side of the I-shaped material crushing box, the bottom of the U-shaped seat is fixed with an upwardly extending steel column, the top end of the steel column is fixed with a vertical bearing seat, one end of the middle material crushing shaft is located in the inner part of the vertical bearing seat, the right-angle support is fixed on the bottom end of the U-shaped seat, and the top end of the threaded shaft is rotatably connected with the bottom end of the U-shaped seat.

[0014] Preferably, the bottom of the right-angle support is welded with two symmetrical rectangular protruding arms, one end of each rectangular protruding arm extends to the lower surface of the U-shaped seat and is bolted with the U-shaped seat, and the inner spline shaft is located between the two rectangular protruding arms.

[0015] Preferably, the outer walls of the two sides of the material collecting box are both provided with straight-mouthed hollow grooves for lifting the end of the middle material crushing shaft.

[0016] The application also provides a manufacturing method of the bamboo-plastic composite material, and the manufacturing device of the bamboo-plastic composite material is used to perform the manufacturing method.

[0017] In S101, the recycled PE material, bamboo fibers and related additives to be processed are input into the material collecting box, and the reduction motor is controlled to work, and the rotary power of the reduction motor is first transmitted to the double-disc multi-arm grinding device, the double-disc multi-arm grinding device performs secondary grinding on the preliminarily crushed recycled PE material and related additives, in the process, the double-disc multi-arm grinding device transmits the rotary power to the middle material crushing shaft through the telescopic spline bidirectional transmission assembly, and the middle material crushing shaft and the side material crushing roller in the I-shaped material crushing box can effectively preliminarily crush the PE material and additives.

[0018] S102: The distance between the middle material crushing shaft and the two side material crushing rollers is controlled by the lead screw distance adjusting structure, the smaller the distance between the middle material crushing shaft and the side material crushing rollers, the more directions the material will be collided and extruded, and the material is refined into smaller particles;

[0019] S103: After the height of the middle material crushing shaft is adjusted, the double-disc multi-arm grinding device and the middle material crushing shaft are still power-connected through the telescopic spline bidirectional transmission assembly, the recycled PE material, bamboo fiber and related additives after preliminary crushing enter the double-disc multi-arm grinding device, and the double-disc multi-arm grinding device helps the material to be mixed and ground efficiently in multiple directions;

[0020] S104: After the crushing and mixing are completed, the processed material enters the banbury body for degassing treatment to remove bubbles or volatile matters generated in the process, and the bamboo plastic composite material that is uniformly mixed and plasticized is discharged from the discharge port of the banbury body and enters the downstream processing link.

[0021] Compared with the prior art, the beneficial effects of the bamboo plastic composite material manufacturing device and method are that: through the close cooperation of the reduction motor, the telescopic spline bidirectional transmission assembly, the double-disc multi-arm grinding device, the middle material crushing shaft and other components, the recycled PE material, bamboo fiber and related additives are crushed, mixed and ground multiple times to form an ideal material product, in the whole process, the reduction motor provides power support, and other mechanical components complete the processing of the material through their respective design and function, and finally the material is transported, mixed and ground to an ideal state to meet the subsequent processing and use requirements, in this continuous processing mode, the recycled PE material is directly subjected to fine processing in the double-disc multi-arm grinding device after being preliminarily crushed in the I-shaped material crushing box, the material collecting box and the middle material crushing shaft, this seamless process greatly shortens the processing time, reduces the gap period of material transfer, greatly speeds up the processing speed of the material in the production process, and more production tasks can be completed in a shorter time, thereby significantly improving the production efficiency; multiple processing links and material processing functions are realized in one device, and the double-disc multi-arm grinding device and the middle material crushing shaft are driven by the reduction motor, the telescopic spline bidirectional transmission assembly, which can greatly reduce the number and types of different types of equipment, reduce equipment investment and use cost, especially the design of the double-disc multi-arm grinding device, the telescopic spline bidirectional transmission assembly and the lead screw distance adjusting structure makes the power transmission more efficient, and reduces the overall working energy consumption of the device;

[0022] By adopting the integrated design, the recycled PE material is completed in a continuous cavity from the collecting tank to the grinding process and then to the mixing in the internal mixer, which greatly reduces the material transfer and intermediate loss, and due to the mutual connection of each link, the material can flow and be processed more efficiently, avoids the material waste caused by multiple loading and unloading, and in the continuous processing link, the mixing, crushing and grinding of the recycled PE material and the additives are carried out synchronously, and the instant mixing mode can ensure the sufficient compatibility and uniform dispersion between the additives and the recycled material, avoids the problem of uneven addition or insufficient mixing of the additives in the traditional process, especially for the additives that need to be accurately matched, gradually adding and grinding with the material in the whole processing process, which can not only improve the performance of the material, but also enhance the stability and reliability of the final product. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the front view structure of the present application;

[0024] Figure 2 is a schematic diagram of the three-dimensional structure of the present application Figure 1 ;

[0025] Figure 3 is a schematic diagram of the three-dimensional structure of the present application Figure 2 ;

[0026] Figure 4 is a schematic diagram of the three-dimensional structure of the present application Figure 3 ;

[0027] Figure 5 is a schematic diagram of the three-dimensional structure of the present application ;

[0028] Figure 6 is a schematic diagram of the three-dimensional structure of the present application ;

[0029] Figure 7 is a schematic diagram of the three-dimensional structure of the present application ;

[0030] Figure 8 is a schematic diagram of the three-dimensional structure of the present application

[0031] In the diagram: 1. Lower frame; 2. Control box; 3. Internal mixer body; 4. Rotary support frame; 5. Double-disc multi-arm grinding device; 501. Grinding box; 502. Arc-shaped screen; 503. Main drive shaft; 504. Support plate; 505. Cross arm; 5051. Scraper; 506. Bearing seat II; 6. Trapezoidal discharge box; 7. I-shaped crushing box; 701. Side-mounted crushing roller; 8. Collection box; 9. Central crushing shaft; 10. Straight... 11. Angle bracket; 11. Telescopic spline bidirectional transmission assembly; 1101. Lower right-angle shaft bracket; 1102. Upper right-angle shaft bracket; 1103. Internal spline shaft; 1104. External spline shaft; 1105. First bevel gear transmission structure; 1106. Second bevel gear transmission structure; 12. Screw pitch adjustment structure; 1201. Threaded shaft; 1202. U-shaped seat; 1203. Steel column; 1204. Vertical bearing seat; 13. Gear motor. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] Example 1, by Figures 1 to 4 The present invention includes a lower frame 1, a mixer body 3 is mounted on the top of the lower frame 1, a rotating support frame 4 is mounted on the top of the lower frame 1 on one side of the mixer body 3, a trapezoidal discharge box 6 connected to the feed inlet of the mixer body 3 is mounted inside the rotating support frame 4, a double-disc multi-arm grinding device 5 for grinding, sieving and crushing the material is mounted on the top of the trapezoidal discharge box 6, a reduction motor 13 for driving the double-disc multi-arm grinding device 5 is mounted on one side of the outer wall of the rotating support frame 4, and a control box 2 is mounted on one side of the outer wall of the lower frame 1, the output end of the control box 2 is electrically connected to the input end of the reduction motor 13;

[0034] An I-shaped crushing box 7 is fixed at the top of a double-disc multi-arm grinding device 5, and the discharge port at the bottom of the I-shaped crushing box 7 is connected to the inlet of the double-disc multi-arm grinding device 5. Side crushing rollers 701 are rotatably installed on the front and rear sides inside the I-shaped crushing box 7. A collection box 8 is installed inside the I-shaped crushing box 7, and a central crushing shaft 9 is rotatably installed inside the collection box 8. The central crushing shaft 9 is located above the two side crushing rollers 701. Screw adjustment structures 12 for controlling the height of the central crushing shaft 9 are provided on both outer walls of the I-shaped crushing box 7. A right-angle bracket 10 is installed on the moving end of one of the screw adjustment structures 12, and a telescopic spline bidirectional transmission assembly 11 for connecting the double-disc multi-arm grinding device 5 and the central crushing shaft 9 is provided on one inner wall of the right-angle bracket 10.

[0035] The motor controller can be installed in the control box 2, which can monitor the working state of the speed reducer motor 13 in real time, including the rotating speed and other parameters of the speed reducer motor 13. The operator can adjust the parameters according to the actual needs to achieve the best processing effect, thereby ensuring the uniform mixing, fine crushing and grinding of the materials to the greatest extent.

[0036] In the second embodiment, on the basis of the first embodiment, Figure 5 、 Figure 6 、 Figure 7 The double-disc multi-arm grinding device 5 includes a grinding material box 501 fixed at the top end of the trapezoidal discharge box 6, an arc-shaped sieve 502 fixed inside the grinding material box 501, a main transmission shaft 503 rotatably installed inside the grinding material box 501, and support discs 504 fixed at both ends of the surface of the main transmission shaft 503. One end of the main transmission shaft 503 is fixedly connected with the output shaft of the speed reducer motor 13. The top end of the arc-shaped sieve 502 is provided with an opening portion for the material to enter;

[0037] A gap portion is arranged between the arc-shaped sieve 502 and the grinding material box 501, which is in communication with the inner cavity of the trapezoidal discharge box 6. A plurality of equally spaced transverse arms 505 are arranged between the adjacent two support discs 504. A scraping knife 5051 is arranged on the outer wall of the side of the transverse arm 505 away from the central axis of the main transmission shaft 503. The support disc 504, the transverse arm 505, and the scraping knife 5051 are all made of stainless steel components. The scraping knife 5051 and the arc-shaped sieve 502 collide and shear the material, which can effectively reduce the flow resistance of the material and promote the continuous grinding of the material for the material that is difficult to grind or has strong adhesion.

[0038] The scraping knife 5051 extends in a wavy shape along the extension direction of the cross arm 505, and the two sides of the top end of the rotary bracket 4 are provided with bearing seats two 506, the main transmission shaft 503 is rotatably installed between the two bearing seats two 506, the bearing seat two 506 and the central axis of the arc-shaped sieve core 502 coincide with each other, and the output shaft of the speed reducer motor 13 drives the main transmission shaft 503 to rotate together, so that the main transmission shaft 503 drives the support disc 504 and the plurality of cross arms 505 between the two support discs 504 to rotate, and the recycled PE material, bamboo fiber, related additives and other materials subjected to crushing treatment by the centrally arranged crushing shaft 9 and the side arranged crushing roller 701 enter the grinding material box 501 through the rectangular discharge port at the bottom end of the I-shaped crushing box 7, at this time, the arc-shaped sieve core 502 receives the materials, at this time, the particle size of the crushed materials is smaller than the pore size of the arc-shaped sieve core 502, so it cannot be discharged from the arc-shaped sieve core 502, in the process of revolution of the scraping knife 5051 around the main transmission shaft 503, the scraping knife 5051 can exert strong shearing, impact and friction force on the materials in the process of high-speed rotation, so that the materials are subjected to repeated impact and shearing, and the grinding effect is strengthened, when the particle size of the materials after grinding is smaller than the pore size of the arc-shaped sieve core 502, the materials pass through the arc-shaped sieve core 502 and enter the banbury mixer body 3 along the trapezoidal discharge box 6 for treatment;

[0039] The telescopic spline bidirectional transmission assembly 11 includes a lower right-angle shaft support 1101 fixed on one side of the outer wall of the rotary bracket 4, an upper right-angle shaft support 1102 fixed on one side of the inner wall of the right-angle support 10, an inner spline shaft 1103 rotatably installed at the bottom of the right-angle support 10, and an outer spline shaft 1104 rotatably installed at the top end of the lower right-angle shaft support 1101, the top end of the outer spline shaft 1104 extends into the inner spline shaft 1103, the inner part of the upper right-angle shaft support 1102 is provided with a second bevel gear transmission structure 1106 for power connection between the opposite ends of the centrally arranged crushing shaft 9 and the inner spline shaft 1103, and the inner part of the lower right-angle shaft support 1101 is provided with a first bevel gear transmission structure 1105 for connecting the opposite ends of the main transmission shaft 503 and the outer spline shaft 1104;

[0040] The first bevel gear transmission structure 1105 and the second bevel gear transmission structure 1106 have the same structure, the first bevel gear transmission structure 1105 is composed of a driving bevel gear and a driven bevel gear, the driving bevel gear is rotatably installed on the inner wall of one side of the lower right-angle shaft frame 1101, the driven bevel gear is rotatably installed on the top wall of the lower right-angle shaft frame 1101, the bottom end of the outer spline shaft 1104 extends to the inside of the lower right-angle shaft frame 1101 and is connected with the driven bevel gear, one end of the main transmission shaft 503 extends to the inside of the lower right-angle shaft frame 1101 and is connected with the driving bevel gear, in the rotation process of the main transmission shaft 503, the main transmission shaft 503 drives the outer spline shaft 1104 at the top end of the lower right-angle shaft frame 1101 to rotate through the first bevel gear transmission structure 1105, since one end of the outer spline shaft 1104 is located in the inner spline shaft 1103, the inner spline shaft 1103 drives the middle material crushing shaft 9 to rotate through the second bevel gear transmission structure 1106, at this time, the main transmission shaft 503 and the middle material crushing shaft 9 rotate synchronously under the drive of the speed reducer 13, the outer spline shaft 1104 and the inner spline shaft 1103 can maintain stability in bidirectional transmission, and can also ensure high-efficiency output under high load, and are suitable for driving components such as the middle material crushing shaft 9 and the main transmission shaft 503 which require high torque;

[0041] The length between the outer spline shaft 1104 and the inner spline shaft 1103 can be adjusted, and the power connection with the main transmission shaft 503 can still be maintained in the case of adjusting the height of the middle material crushing shaft 9.

[0042] In example three, on the basis of example two, Figure 8 It is given that the screw rod distance adjusting structure 12 includes a threaded shaft 1201 rotatably installed on one side of the bottom end of the I-shaped material crushing box 7 and a U-shaped seat 1202 slidably installed on the outer wall of one side of the I-shaped material crushing box 7, the bottom of the U-shaped seat 1202 is fixed with an upwardly extending steel column 1203, the top end of the steel column 1203 is fixed with an upright bearing seat 1204, one end of the middle material crushing shaft 9 is located in the inside of the upright bearing seat 1204, the right-angle frame 10 is fixed at the bottom end of the U-shaped seat 1202, the top end of the threaded shaft 1201 is rotatably connected with the bottom end of the U-shaped seat 1202, the bottom of the right-angle frame 10 is welded with two symmetrical rectangular protruding arms, one end of the rectangular protruding arm extends to the lower surface of the U-shaped seat 1202 and is bolted with the U-shaped seat 1202, and the inner spline shaft 1103 is located between the two rectangular protruding arms;

[0043] The two side outer walls of the aggregate tank 8 are provided with straight-mouth hollow grooves for lifting the end of the centrally-arranged crushing shaft 9. A worker manually rotates the threaded shaft 1201, so that the threaded shaft 1201 is screwed upwards, and then the threaded shaft 1201 drives the U-shaped seat 1202, the right-angle frame 10, the inner spline shaft 1103, the upper right-angle shaft frame 1102, and the second bevel gear transmission structure 1106 to move upwards. At this time, since the centrally-arranged crushing shaft 9 is installed in the vertical bearing seat 1204 at the top of the steel column 1203, the centrally-arranged crushing shaft 9 is also adjusted to move upwards. At this time, the spacing between the centrally-arranged crushing shaft 9 and the side-arranged crushing roller 701 is increased, and vice versa, so as to obtain material particles with different processing particle sizes.

[0044] In use, the PE material and related additives are first input into the material collecting box 8, which is located at the top of the feeding port of the internal mixer body 3. The material collecting box is a storage and preliminary guiding component for the PE material, bamboo fiber, related additives and other materials. The materials are uniformly distributed in the material collecting box 8 and are ready for subsequent processing. The staff opens the speed reducer 13 through the control box 2 to work. The rotary power of the speed reducer 13 is first transmitted to the double-disc multi-arm grinding device 5. The double-disc multi-arm grinding device 5 grinds the preliminarily crushed PE material and related additives for the second time. In this process, the double-disc multi-arm grinding device 5 transmits the rotary power to the middle crushing shaft 9 through the telescopic spline bidirectional transmission assembly 11. The middle crushing shaft 9 is located at the lower position of the material collecting box 8. It cooperates with the side crushing rollers 701 in the I-shaped crushing box 7 to effectively preliminarily crush the PE material and additives. At this time, the materials are cut and compressed by the high-speed rotating middle crushing shaft 9 and are broken into smaller particles or fragments. The crushed materials then enter the I-shaped crushing box 7. The I-shaped crushing box 7 enables the materials to flow along a specific trajectory, thereby avoiding blockage and aggregation. In the crushing box, the staff can control the distance between the middle crushing shaft 9 and the two side crushing rollers 701 through the screw rod distance adjusting structure 12. The smaller the distance between the middle crushing shaft 9 and the side crushing rollers 701, the more directions the materials will be collided and extruded, and the smaller the particles will be. In this process, the speed reducer 13 drives each related component through the telescopic spline bidirectional transmission assembly 11. The telescopic spline bidirectional transmission assembly 11 can ensure stable and adjustable power transmission, adapt to different characteristics of the materials, and keep the power connection between the double-disc multi-arm grinding device 5 and the middle crushing shaft 9 after the height adjustment of the middle crushing shaft 9. The preliminarily crushed PE material, bamboo fiber, related additives and other materials enter the double-disc multi-arm grinding device 5. In this process, the speed reducer 13 directly transmits power to the double-disc multi-arm grinding device 5, which can operate at different speeds, thereby increasing the friction and extrusion force between the materials and helping the materials to be efficiently mixed and ground in multiple directions. This process is particularly important for PE materials containing additives, which can make the materials and additives fully integrated to achieve the desired physical properties and chemical reaction effects in the internal mixer body 3. After crushing and mixing, the materials often need to enter the internal mixer body 3 for degassing treatment to remove bubbles or volatile substances generated in the process. The crushed, ground and treated raw materials enter the cavity of the internal mixer body 3 through the feeding port. The rotor in the internal mixer body 3 rotates at high speed to generate strong shearing force and friction force, so that the materials continuously interact with each other in the mixing chamber. The bamboo fiber and plastic matrix are fully mixed, the plastic matrix is heated to a molten state, and the bamboo plastic composite material uniformly coated with the bamboo fiber is discharged from the discharge port of the internal mixer body 3 and enters the downstream processing link, such as extrusion molding or injection molding.

[0045] It has to be noted that, in the present document, the terms "first", "second", etc. merely serve to identify different entities or actions from each other, without necessarily requiring or implying any actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0046] While embodiments of the present application have been shown and described with reference to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. The scope of the application is defined by the appended claims and their equivalents.

Claims

1. A bamboo-plastic composite material manufacturing device, characterized in that, Include: The lower frame (1), the top end of the lower frame (1) is provided with a mixer body (3), and the top end of the lower frame (1) on one side of the mixer body (3) is provided with a rotary bracket (4), and the inside of the rotary bracket (4) is provided with a trapezoidal discharge box (6) connected with the feed inlet of the mixer body (3), and the top end of the trapezoidal discharge box (6) is provided with a double-disc multi-arm grinding device (5) for grinding, screening and crushing the material, a reduction motor (13) is installed on one side of the outer wall of the rotary bracket (4) for driving the double-disc multi-arm grinding device (5) to work, and a control box (2) is installed on one side of the outer wall of the lower frame (1), and the output end of the control box (2) is electrically connected with the input end of the reduction motor (13); The I-shaped material box (7) is fixed at the top of the double-disc multi-arm grinding device (5), and the discharge port at the bottom of the I-shaped material box (7) is connected with the feed inlet of the double-disc multi-arm grinding device (5), the front and rear sides of the inside of the I-shaped material box (7) are rotatably provided with side material rollers (701), the inside of the I-shaped material box (7) is provided with a material collecting box (8), and the inside of the material collecting box (8) is rotatably provided with a middle material shaft (9), the middle material shaft (9) is located above the two side material rollers (701), and the two side walls of the I-shaped material box (7) are provided with a lead screw distance adjusting structure (12) for controlling the height of the middle material shaft (9), one end of the lead screw distance adjusting structure (12) is provided with a right-angle frame (10), and the inner wall of one side of the right-angle frame (10) is provided with a telescopic spline bidirectional transmission assembly (11) for connecting the double-disc multi-arm grinding device (5) and the middle material shaft (9); The double-disc multi-arm grinding device (5) comprises a grinding material box (501) fixed at the top of the trapezoidal discharge box (6), an arc-shaped sieve core (502) fixed in the grinding material box (501), a main transmission shaft (503) rotatably installed in the grinding material box (501), and support discs (504) fixed on both ends of the surface of the main transmission shaft (503), one end of the main transmission shaft (503) is fixedly connected with the output shaft of the reduction motor (13), the arc-shaped sieve core (502) and the grinding material box (501) are provided with a gap part in communication with the inner chamber of the trapezoidal discharge box (6), a plurality of equally spaced transverse arms (505) are installed between adjacent two support discs (504), and a scraping knife (5051) is installed on one side of the outer wall of the transverse arm (505) away from the central axis of the main transmission shaft (503).

2. The bamboo-plastic composite material manufacturing device according to claim 1, characterized in that: The scraping knife (5051) extends in a wave shape along the extension direction of the transverse arm (505), the top end of the rotary bracket (4) is provided with a bearing seat two (506) on both sides, the main transmission shaft (503) is rotatably installed between the two bearing seat two (506), and the central axes of the bearing seat two (506) and the arc-shaped sieve core (502) coincide with each other.

3. The bamboo-plastic composite material manufacturing device according to claim 2, characterized in that: The top end of the arc-shaped screen shell (502) is provided with an opening part for feeding materials, and the support disc (504), the cross arm (505) and the material scraping knife (5051) are all made of stainless steel components.

4. The bamboo-plastic composite material manufacturing device according to claim 3, characterized in that: The telescopic spline bidirectional transmission assembly (11) comprises a lower right-angle shaft support (1101) fixed on one side of the outer wall of the rotary bracket (4), an upper right-angle shaft support (1102) fixed on one side of the inner wall of the right-angle bracket (10), an inner spline shaft (1103) rotatably installed at the bottom of the right-angle bracket (10), and an outer spline shaft (1104) rotatably installed at the top end of the lower right-angle shaft support (1101), wherein the top end of the outer spline shaft (1104) extends into the inner spline shaft (1103), the inside of the upper right-angle shaft support (1102) is provided with a second bevel gear transmission structure (1106) for power connection between the middle material crushing shaft (9) and the opposite ends of the inner spline shaft (1103), and the inside of the lower right-angle shaft support (1101) is provided with a first bevel gear transmission structure (1105) for connecting the opposite ends of the main transmission shaft (503) and the outer spline shaft (1104).

5. The bamboo-plastic composite material manufacturing device according to claim 4, characterized in that: The first bevel gear transmission structure (1105) and the second bevel gear transmission structure (1106) have the same structure, the first bevel gear transmission structure (1105) comprises a driving bevel gear and a driven bevel gear, the driving bevel gear is rotatably installed on one side of the inner wall of the lower right-angle shaft support (1101), the driven bevel gear is rotatably installed on the top wall of the lower right-angle shaft support (1101), the bottom end of the outer spline shaft (1104) extends into the inside of the lower right-angle shaft support (1101) and is connected with the driven bevel gear, and one end of the main transmission shaft (503) extends into the inside of the lower right-angle shaft support (1101) and is connected with the driving bevel gear.

6. The bamboo-plastic composite material manufacturing device according to claim 5, characterized in that: The screw rod distance adjusting structure (12) comprises a threaded shaft (1201) rotatably installed on one side of the bottom end of the I-shaped material crushing box (7) and a U-shaped seat (1202) slidably installed on one side of the outer wall of the I-shaped material crushing box (7), the bottom of the U-shaped seat (1202) is fixed with an upwardly extending steel column (1203), the top end of the steel column (1203) is fixed with a vertical bearing seat (1204), one end of the middle material crushing shaft (9) is located in the inside of the vertical bearing seat (1204), the right-angle bracket (10) is fixed at the bottom end of the U-shaped seat (1202), and the top end of the threaded shaft (1201) is rotatably connected with the bottom end of the U-shaped seat (1202).

7. The bamboo-plastic composite material manufacturing device according to claim 6, characterized in that: The bottom of the right-angle bracket (10) is welded with two symmetrical rectangular convex arms, one end of the rectangular convex arm extends to the lower surface of the U-shaped seat (1202) and is bolted with the U-shaped seat (1202), and the inner spline shaft (1103) is located between the two rectangular convex arms. 8.The bamboo-plastic composite material manufacturing device according to claim 7, characterized in that: The two side outer walls of the aggregate box (8) are both provided with straight-mouthed hollow grooves for lifting the end of the middle material crushing shaft (9).

9. A manufacturing method of the bamboo-plastic composite material, comprising the bamboo-plastic composite material manufacturing device according to any one of claims 1-8, characterized in that: The method comprises the following steps: S101: The recycled PE material to be processed, bamboo fiber and related additives are input into the material collecting box (8), the speed reducer motor (13) is started to work through the control box (2), the rotary power of the speed reducer motor (13) is first transmitted to the double-disc multi-arm grinding device (5), the double-disc multi-arm grinding device (5) grinds the preliminarily crushed recycled PE material and related additives for the second time, in the process, the double-disc multi-arm grinding device (5) transmits the rotary power to the middle crushing shaft (9) through the telescopic spline bidirectional transmission assembly (11), the middle crushing shaft (9) and the side crushing roller (701) in the I-shaped crushing box (7) can effectively preliminarily crush the PE material and additives; S102: The distance between the middle crushing shaft (9) and the two side crushing rollers (701) is controlled by the screw rod distance adjusting structure (12), the smaller the distance between the middle crushing shaft (9) and the side crushing roller (701), the more directions the material will be collided and extruded, and the smaller the particles will be; S103: After the height of the middle crushing shaft (9) is adjusted, the double-disc multi-arm grinding device (5) and the middle crushing shaft (9) are still power-connected through the telescopic spline bidirectional transmission assembly (11), the preliminarily crushed recycled PE material, bamboo fiber and related additives enter the double-disc multi-arm grinding device (5), and the double-disc multi-arm grinding device (5) makes the material be efficiently mixed and ground in multiple directions; S104: After the crushing and mixing are completed, the processed material enters the internal mixer body (3) to be degassed to remove the bubbles or volatile matters generated in the process, the mixed and plasticized bamboo plastic composite material is discharged from the discharge port of the internal mixer body (3) and enters the downstream processing link.

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