Bamboo-plastic composite material manufacturing device and method

Abstract

The bamboo-plastic composite material manufacturing device comprises a lower rack, an internal mixer body is installed at the top end of the lower rack, a rotary bracket is installed at the position, on one side of the internal mixer body, of the top end of the lower rack, and a trapezoidal discharging box connected with a feeding port of the internal mixer body is installed in the rotary bracket; and a double-disc multi-arm grinding device for grinding and sieving the crushed materials is mounted at the top end of the trapezoidal discharging box. A plurality of treatment links and a material treatment function are integrated in one device to be realized, and the double-disc multi-arm grinding device and the middle crushing shaft are driven to work by the gear motor and the telescopic spline bidirectional transmission assembly together, so that the number and types of different types of equipment can be greatly reduced, the equipment investment and the use cost are reduced, and the production efficiency is improved. And the gap period of material transfer is shortened, so that the material treatment speed in the production process is greatly increased.

Description

Technical Field

[0001] The invention relates to the technical field of bamboo-plastic composite material manufacturing, in particular to a bamboo-plastic composite material manufacturing device and a method thereof. Background Art

[0002] In the production of bamboo-plastic composite materials, internal mixers are mainly used to evenly mix, heat, melt, and plasticize bamboo fibers and plastic matrices, and ensure that bamboo fibers are well dispersed in the plastic matrix. The internal mixer generates shear force and friction force through the high-speed rotating rotor, so that the bamboo fibers and the plastic matrix are fully integrated, 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 a molten 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 its core component is the rotor. Common rotor types include spiral ribbon type, conical type and star type, and different types are suitable for different processing requirements. When the rotor rotates, the shear force and friction force generated enable the materials to be efficiently mixed, ensuring full contact and bonding between the plastic and the bamboo fiber, thereby optimizing the mechanical properties of the composite material; For example, a high-strength bamboo-plastic composite material for container bottom plates disclosed in the authorization announcement number CN114507453B discloses a preparation method of the high-strength bamboo-plastic composite material for container bottom plates, wherein polyethylene resin, recycled plastic and polyvinyl butyral are mixed and stirred for 5 minutes, and then modified bamboo powder and coupling agent are added, stirred for 5-10 minutes, and dried at 100±5°C for 2 hours to obtain a pre-mixture, and the pre-mixture, compatibilizer, lubricant and anti-aging agent are sequentially added to a high-speed mixer and mixed for 10-20 minutes, and the mixing temperature is 120-130°C, and then directly introduced into a twin-screw extruder for extrusion granulation, wherein the extruder temperature is 150-185°C, and the screw speed is 40-50r / min, so as to obtain the high-strength bamboo-plastic composite material. The above technical scheme is to use a high-speed mixer, Internal mixers, twin-screw extruders and other equipment are used to manufacture bamboo-plastic composite materials. However, before supplying recycled plastic particles to the internal mixer, the recycled PE material needs to be ground to 30 mesh or above to increase the composite strength of plastic and bamboo fiber, so that bamboo fiber and related additives can be added and mixed for granulation. Therefore, the recycled PE material must at least be processed by crushers, grinders, screening machines and other equipment, and crushing equipment and grinding equipment require a higher purchase cost, especially when processing a large amount of recycled PE materials. Due to the complex nature and heterogeneity of recycled plastics, specially designed equipment is required for processing, and the crushing and grinding process of recycled PE materials is a relatively time-consuming step, especially when processing harder or heavier plastic particles, it may require material transfer between multiple devices for crushing and refinement, which not only prolongs the production cycle, but also leads to production line bottlenecks. Summary of the invention

[0003] The object of the present invention is to provide a bamboo-plastic composite material manufacturing device and method thereof. A collection box, an I-shaped crushing box, a double-disc multi-arm grinding device and a trapezoidal discharge box are arranged in sequence above the feed port of an internal mixer body. When the double-disc multi-arm grinding device is driven by a reduction motor to work, the double-disc multi-arm grinding device transmits the rotary power to the middle crushing shaft in the collection box through a telescopic spline bidirectional transmission assembly, so that the middle crushing shaft initially crushes the recycled PE material, and the recycled PE material enters the double-disc multi-arm grinding device for grinding until it is ground to 30 meshes or above, and relevant additives can be gradually added during the crushing and grinding process, so that the ground and mixed recycled PE material and relevant additives enter the internal mixer body, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a bamboo-plastic composite material manufacturing device, comprising: A lower frame, the top of the lower frame is equipped with an internal mixer body, and a rotary bracket is installed on the top of the lower frame on one side of the internal mixer body, and a trapezoidal discharge box connected to the feed port of the internal mixer body is installed inside the rotary bracket, and a double-disc multi-arm grinding device for grinding and sieving the crushed materials is installed on the top of the trapezoidal discharge box, a reduction motor for driving the double-disc multi-arm grinding device is installed on the outer wall of one side of the rotary bracket, and a control box is installed on the outer wall of one side of the lower frame, and the output end of the control box is electrically connected to the input end of the reduction motor; An I-shaped crusher box, wherein the I-shaped crusher box is fixed on the top of a double-disc multi-arm grinding device, and the discharge port at the bottom end of the I-shaped crusher box is connected to the feed port of the double-disc multi-arm grinding device, and the front and rear sides of the interior of the I-shaped crusher box are rotatably installed with side crusher rollers, a collecting box is installed inside the I-shaped crusher box, and a central crusher shaft is rotatably installed inside the collecting box, and the central crusher shaft is located above the two side crusher rollers, and screw adjustment structures for controlling the height of the central crusher shaft are provided on the outer walls on both sides of the I-shaped crusher box, and a right-angle frame is installed on the movable end of one of the screw adjustment structures, and a telescopic spline bidirectional transmission assembly for connecting the double-disc multi-arm grinding device and the central crusher shaft is provided on the inner wall of one side of the right-angle frame.

[0005] Preferably, the double-disc multi-arm grinding device includes an abrasive box fixed on the top of a trapezoidal discharge box, an arc-shaped screen core fixed inside the abrasive box, a main drive shaft rotatably mounted inside the abrasive box, and support plates fixed at both ends of the surface of the main drive shaft, one end of the main drive shaft is fixedly connected to the output shaft of the reduction motor, a gap portion communicating with the internal chamber of the trapezoidal discharge box is provided between the arc-shaped screen core and the abrasive box, a plurality of equally spaced cross arms are installed between two adjacent support plates, and a scraper is installed on the outer wall of the cross arm on the side away from the central axis of the main drive shaft.

[0006] Preferably, the scraper extends in a wave shape in parallel along the extension direction of the cross arm, bearing seats 2 are installed on both sides of the top of the rotating bracket, the main transmission shaft is rotatably installed between the two bearing seats 2, and the central axes of the bearing seat 2 and the arc-shaped screen gall coincide with each other.

[0007] Preferably, the top of the arc-shaped screen is provided with an opening for materials to enter, and the support plate, cross arm and scraper are all made of stainless steel.

[0008] Preferably, the telescopic spline bidirectional transmission assembly includes a lower right-angle shaft frame fixed on the outer wall of one side of the rotating bracket, an upper right-angle shaft frame fixed on the inner wall of one side of the right-angle frame, an inner spline shaft rotatably installed at the bottom of the right-angle frame, and an outer spline shaft rotatably installed at the top of the lower right-angle shaft frame, the top of the outer spline shaft extends to the interior of the inner spline shaft, the interior of the upper right-angle shaft frame is provided with a second bevel gear transmission structure for maintaining power connection between the central crushing shaft and the relative ends of the inner spline shaft, and the interior of the lower right-angle shaft frame is provided with a first bevel gear transmission structure for connecting the main transmission shaft and the relative ends of the outer spline shaft.

[0009] Preferably, the first bevel gear transmission structure and the second bevel gear transmission structure have the same structural composition, and the first bevel gear transmission structure consists of a driving bevel gear and a driven bevel gear, the driving bevel gear is rotatably mounted on an inner wall of one side of the lower right-angle shaft frame, and the driven bevel gear is rotatably mounted on the top wall of the lower right-angle shaft frame, the bottom end of the external spline shaft extends to the interior of the lower right-angle shaft frame and is interconnected with the driven bevel gear, and one end of the main transmission shaft extends to the interior of the lower right-angle shaft frame and is interconnected with the driving bevel gear.

[0010] Preferably, the screw rod pitch adjustment structure includes a threaded shaft rotatably mounted on one side of the bottom end of the I-shaped crusher box and a U-shaped seat slidably mounted on the outer wall of one side of the I-shaped crusher box, a steel column extending upward is fixed to the bottom of the U-shaped seat, a vertical bearing seat is fixed to the top of the steel column, one end of the central crusher shaft is located inside the vertical bearing seat, the right angle frame is fixed to the bottom end of the U-shaped seat, and the top end of the threaded shaft is rotatably connected to the bottom end of the U-shaped seat.

[0011] Preferably, two symmetrical rectangular protrusions are welded to the bottom of the right-angle frame, one end of the rectangular protrusion extends to the lower surface of the U-shaped seat and is bolted to the U-shaped seat, and the inner spline shaft is located between the two rectangular protrusions.

[0012] Preferably, both side outer walls of the collecting box are provided with straight-mouthed hollow grooves for the lifting and lowering of the end of the central crushing shaft.

[0013] The present invention also provides a method for manufacturing a bamboo-plastic composite material, such as the bamboo-plastic composite material manufacturing device described above, comprising the following steps: S101: The recycled PE materials, bamboo fibers and related additives to be processed are input into the collecting box, and the reduction motor is turned on through the control box to work. The rotary power of the reduction motor is first transmitted to the double-disc multi-arm grinding device, and the double-disc multi-arm grinding device performs secondary grinding on the recycled PE materials and related additives after preliminary crushing. In this process, the double-disc multi-arm grinding device transmits the rotary power to the central crushing shaft through the telescopic spline bidirectional transmission assembly. The cooperation between the central crushing shaft and the side crushing rollers in the I-shaped crushing box can effectively perform preliminary crushing on the PE materials and additives; S102: The distance between the central crushing shaft and the two side crushing rollers is controlled by the screw distance adjustment structure. The smaller the distance between the central crushing shaft and the side crushing rollers, the more collisions and extrusions the materials will experience in more directions, and the materials will be broken into smaller particles. S103: After the height of the middle crushing shaft is adjusted, the double-disc multi-arm grinding device and the middle crushing shaft are still dynamically engaged through the telescopic spline bidirectional transmission assembly, and the recycled PE material, bamboo fiber, related additives and other materials after preliminary crushing enter the double-disc multi-arm grinding device, which helps the materials to be efficiently mixed and ground in multiple directions; S104: After the crushing and mixing are completed, the processed materials enter the internal mixer body for degassing to remove bubbles or volatiles generated in the process. The evenly mixed and plasticized bamboo-plastic composite material is discharged through the discharge port of the internal mixer body and enters the downstream processing link.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the bamboo-plastic composite material manufacturing device and method thereof, through the close cooperation of the reduction motor, the telescopic spline bidirectional transmission assembly, the double-disc multi-arm grinding device, the middle-placed crushing shaft and other components, enables the recycled PE material, bamboo fiber and related additives to be crushed, mixed and ground for many times, and finally form an ideal material product. In the whole process, the reduction motor provides power support, while other mechanical components complete the processing of the material through their respective designs and functions. Finally, the material is conveyed, mixed and ground to an ideal state to meet the subsequent processing and use requirements. Under this continuous processing mode, the recycled PE material is initially crushed by the I-shaped crushing box, the collecting box and the middle-placed crushing shaft, and then directly enters the double-disc crushing box. The multi-arm grinding device is used for fine processing. This seamless process greatly shortens the processing time and reduces the gap period of material transfer, which greatly speeds up the material processing speed in the production process and can complete more production tasks in a shorter time, thereby significantly improving production efficiency; multiple processing links and material processing functions are concentrated in one device, and the double-disc multi-arm grinding device and the central crushing shaft are driven by the reduction motor and the telescopic spline bidirectional transmission assembly, which can greatly reduce the number and types of different types of equipment, reduce equipment investment and use costs, especially the design of the double-disc multi-arm grinding device, the telescopic spline bidirectional transmission assembly, and the screw pitch adjustment structure, which makes the power transmission more efficient and reduces the overall working energy consumption of the device; By adopting an integrated design, the recycling of PE materials from the aggregate box to the grinding process, and then to the mixing in the internal mixer, is basically completed in a continuous chamber, which greatly reduces the transfer and intermediate losses of materials. At the same time, since each link is interconnected, the material can flow and be processed more efficiently, avoiding material waste caused by multiple loading and unloading. In this continuous processing link, the mixing, crushing and grinding of the recycled PE material and the additives are carried out simultaneously. This instant mixing method can ensure the full compatibility and uniform dispersion between the additives and the recycled materials, avoiding the problems of uneven addition of additives or insufficient mixing that may occur in traditional processes. In particular, for additives that require precise formulation, they are gradually added and ground with the materials during the entire 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 THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ; Figure 3 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ; Figure 4 The three-dimensional structure of the present invention is shown in FIG. Figure 3 ; Figure 5 It is a schematic diagram of a three-dimensional cross-sectional structure of a double-disc multi-arm grinding device according to a second embodiment of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of a telescopic spline bidirectional transmission assembly according to the second embodiment of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of a support plate according to the second embodiment of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the screw rod pitch adjustment structure of the third embodiment of the present invention.

[0016] In the figure: 1, lower frame; 2, control box; 3, internal mixer body; 4, rotary bracket; 5, double-disc multi-arm grinding device; 501, abrasive box; 502, arc-shaped screen gallbladder; 503, main transmission shaft; 504, support plate; 505, cross arm; 5051, scraper; 506, bearing seat 2; 6, trapezoidal discharge box; 7, I-shaped crushing box; 701, side crushing roller; 8, collecting box; 9, middle crushing shaft; 10, straight 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. Reducer motor. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1, by Figures 1 to 4 The present invention comprises a lower frame 1, a mixer body 3 is installed on the top of the lower frame 1, and a rotary bracket 4 is installed on the top of the lower frame 1 on one side of the mixer body 3, and a trapezoidal discharge box 6 connected to the feed port of the mixer body 3 is installed inside the rotary bracket 4, and a double-disc multi-arm grinding device 5 for grinding and sieving the crushed materials is installed on the top of the trapezoidal discharge box 6, a reduction motor 13 for driving the double-disc multi-arm grinding device 5 is installed on the outer wall of one side of the rotary bracket 4, and a control box 2 is installed on the outer wall of one side of the lower frame 1, and the output end of the control box 2 is electrically connected to the input end of the reduction motor 13; An I-shaped crushing box 7, the I-shaped crushing box 7 is fixed on the top of the 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 feed port of the double-disc multi-arm grinding device 5, the front and rear sides of the inside of the I-shaped crushing box 7 are rotatably installed with side crushing rollers 701, a collecting box 8 is installed inside the I-shaped crushing box 7, and a central crushing shaft 9 is rotatably installed inside the collecting box 8, and the central crushing shaft 9 is located above the two side crushing rollers 701, and the outer walls of both sides of the I-shaped crushing box 7 are provided with screw adjustment structures 12 for controlling the height of the central crushing shaft 9, a right-angle frame 10 is installed at the movable 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 the inner wall of one side of the right-angle frame 10; A motor controller can also be installed in the control box 2. The motor controller can monitor the working status of the reduction motor 13 in real time, including parameters such as the speed of the reduction motor 13. The operator can adjust the parameters according to actual needs to achieve the best processing effect, thereby ensuring that the uniform mixing, fine crushing and grinding of the materials are optimized to the greatest extent.

[0019] Embodiment 2, based on embodiment 1, Figure 5 , Figure 6 , Figure 7 It is given that the double-disc multi-arm grinding device 5 includes an abrasive box 501 fixed on the top of a trapezoidal discharge box 6, an arc-shaped screen 502 fixed inside the abrasive box 501, a main transmission shaft 503 rotatably installed inside the abrasive box 501, and support plates 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 to the output shaft of the reduction motor 13, and the top of the arc-shaped screen 502 is provided with an opening for material to enter; A gap portion interconnected with the inner chamber of the trapezoidal discharge box 6 is provided between the arc-shaped screen 502 and the abrasive box 501. A plurality of equally spaced cross arms 505 are installed between two adjacent support plates 504. A scraper 5051 is installed on the outer wall of the cross arm 505 away from the central axis of the main transmission shaft 503. The support plate 504, the cross arm 505 and the scraper 5051 are all made of stainless steel. The scraper 5051 and the arc-shaped screen 502 are used to produce collision and shearing effects on the material. For materials that are difficult to grind or have strong adhesion, the flow resistance of the material can be effectively reduced, and the continuous grinding of the material is promoted; The scraper blade 5051 extends in a wave shape in parallel along the extension direction of the cross arm 505. The two sides of the top of the rotary bracket 4 are equipped with bearing seats 506. The main transmission shaft 503 is rotatably installed between the two bearing seats 506. The central axes of the bearing seats 506 and the arc-shaped screen gallbladder 502 coincide with each other. The output shaft of the reduction motor 13 drives the main transmission shaft 503 to rotate together, and the main transmission shaft 503 drives the support plate 504 and the multiple cross arms 505 between the two support plates 504 to rotate. The recycled PE material, bamboo fiber, related additives and other materials that have been crushed by the central crushing shaft 9 and the side crushing roller 701 pass through the bottom of the I-shaped crushing box 7. The rectangular discharge port enters the abrasive box 501. At this time, the arc-shaped screen gall 502 receives the material. At this time, the particle size of the crushed material is smaller than the aperture of the arc-shaped screen gall 502, so it cannot be discharged from the arc-shaped screen gall 502. During the revolution of the cross arm 505 and the scraper 5051 around the main transmission shaft 503, the scraper 5051 can exert strong shearing, impact and friction forces on the material during the high-speed rotation, so that the material is repeatedly collided and sheared, and the grinding effect is strengthened. When the particle size of the ground material is smaller than the aperture of the arc-shaped screen gall 502, the material passes through the arc-shaped screen gall 502 and enters the internal mixer body 3 along the trapezoidal discharge box 6 for processing; The telescopic spline bidirectional transmission assembly 11 comprises a lower right-angle shaft frame 1101 fixed on the outer wall of one side of the rotating bracket 4, an upper right-angle shaft frame 1102 fixed on the inner wall of one side of the right-angle frame 10, an inner spline shaft 1103 rotatably mounted on the bottom of the right-angle frame 10, and an outer spline shaft 1104 rotatably mounted on the top of the lower right-angle shaft frame 1101, the top of the outer spline shaft 1104 extends to the inside of the inner spline shaft 1103, the inside of the upper right-angle shaft frame 1102 is provided with a second bevel gear transmission structure 1106 for maintaining the power connection between the opposite ends of the central crushing shaft 9 and the inner spline shaft 1103, and the inside of the lower right-angle shaft frame 1101 is provided with a first bevel gear transmission structure 1105 for connecting the main transmission shaft 503 and the opposite ends of the outer spline shaft 1104; The first bevel gear transmission structure 1105 and the second bevel gear transmission structure 1106 have the same structural composition. 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, and the driven bevel gear is rotatably installed on the top wall of the lower right-angle shaft frame 1101. The bottom end of the external spline shaft 1104 extends to the interior of the lower right-angle shaft frame 1101 and is connected to the driven bevel gear. One end of the main transmission shaft 503 extends to the interior of the lower right-angle shaft frame 1101 and is connected to the driving bevel gear. During the rotation of the main transmission shaft 503, the main transmission shaft 503 will pass through the first The bevel gear transmission structure 1105 drives the outer spline shaft 1104 at the top of the lower right-angle shaft frame 1101 to rotate. 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 crushing shaft 9 to rotate through the second bevel gear transmission structure 1106. At this time, the main transmission shaft 503 and the middle crushing shaft 9 rotate synchronously under the drive of the reduction motor 13. The outer spline shaft 1104 and the inner spline shaft 1103 can maintain stability in bidirectional transmission and ensure high-efficiency output under higher loads, and are suitable for driving components with high torque requirements such as the middle crushing shaft 9 and the main transmission shaft 503; The lengths of the outer spline shaft 1104 and the inner spline shaft 1103 can be adjusted, so that when the height of the middle crushing shaft 9 is adjusted, the power connection with the main transmission shaft 503 can still be maintained.

[0020] Embodiment 3, based on embodiment 2, Figure 8 It is given that the screw pitch adjustment structure 12 includes a threaded shaft 1201 rotatably mounted on one side of the bottom end of the I-shaped crushing box 7 and a U-shaped seat 1202 slidably mounted on the outer wall of one side of the I-shaped crushing box 7, a steel column 1203 extending upward is fixed to the bottom of the U-shaped seat 1202, a vertical bearing seat 1204 is fixed to the top of the steel column 1203, one end of the central crushing shaft 9 is located inside the vertical bearing seat 1204, a right angle frame 10 is fixed to the bottom end of the U-shaped seat 1202, the top end of the threaded shaft 1201 is rotatably connected to the bottom end of the U-shaped seat 1202, two symmetrical rectangular protruding arms are welded to the bottom of the right angle frame 10, one end of the rectangular protruding arm extends to the lower surface of the U-shaped seat 1202 and is bolted to the U-shaped seat 1202, and the inner spline shaft 1103 is located between the two rectangular protruding arms; The outer walls on both sides of the collecting box 8 are provided with straight hollow grooves for the end of the central crushing shaft 9 to rise and fall. The staff manually rotates the threaded shaft 1201 to make the threaded shaft 1201 screwed upward, and the threaded shaft 1201 drives the U-shaped seat 1202, the right-angle frame 10, the internal spline shaft 1103, the upper right-angle shaft frame 1102, and the second bevel gear transmission structure 1106 to move upward. At this time, since the central crushing shaft 9 is installed in the vertical bearing seat 1204 at the top of the steel column 1203, the central crushing shaft 9 is also adjusted to move upward. At this time, the distance between the central crushing shaft 9 and the side crushing roller 701 is increased, and vice versa, the distance between the two is smaller, so as to obtain material particles of different processing particle sizes.

[0021] When the embodiment of the present application is in use, firstly, the recycled PE material and related additives are input into the aggregate box 8, which is located at the top of the feed port of the internal mixer body 3, and is a storage and preliminary guiding component for recycled PE material, bamboo fiber, related additives and other materials. The materials are evenly distributed in the aggregate box 8 and are ready for subsequent processing. The staff turns on the reduction motor 13 through the control box 2 to work, and the rotary power of the reduction motor 13 is first transmitted to the double-disc multi-arm grinding device 5, which performs secondary grinding on the recycled PE material and related additives after preliminary crushing. In this process, the double-disc multi-arm grinding device 5 transmits the rotary power to the central crushing shaft 9 through the telescopic spline bidirectional transmission assembly 11, and the central crushing shaft 9 is located in the aggregate box 8. At the lower position of the I-shaped crushing box 7, it cooperates with the side crushing rollers 701 in the I-shaped crushing box 7 to effectively perform preliminary crushing of PE materials and additives. At this time, the materials are cut and compressed by the high-speed rotating middle crushing shaft 9 and are crushed into smaller particles or fragments. The crushed materials then enter the I-shaped crushing box 7. The I-shaped crushing box 7 allows the materials to flow along a specific trajectory to avoid 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 spacing adjustment structure 12. The smaller the distance between the middle crushing shaft 9 and the side crushing rollers 701, the more collisions and extrusions the materials will be subjected to, and the materials will be refined into smaller particles. In this process, the reduction motor 13 is driven by a telescopic spline. The two-way transmission assembly 11 drives various related components. The telescopic spline two-way transmission assembly 11 can ensure stable and adjustable power transmission to adapt to the different characteristics of the materials. 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 powered by the telescopic spline two-way transmission assembly 11. The recycled PE materials, bamboo fibers, related additives and other materials after preliminary crushing enter the double-disc multi-arm grinding device 5. During this process, the reduction motor 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, helping to enable the materials to be efficiently mixed and ground in multiple directions. This process is particularly important for PE materials containing additives. , which can fully integrate the materials and additives so as to achieve the ideal physical properties and chemical reaction effects in the internal mixer body 3. After the crushing and mixing are completed, the materials often need to enter the internal mixer body 3 for degassing treatment to remove the bubbles or volatiles generated in the process. The crushed, ground and processed raw materials enter the cavity of the internal mixer body 3 through the feed port. The rotor in the internal mixer body 3 rotates at a high speed, generating strong shear force and friction force, so that the materials continue to interact with each other in the internal mixer cavity, and the bamboo fiber is fully mixed with the plastic matrix. The plastic matrix is ​​heated to a molten state and evenly covers the bamboo fiber. The evenly mixed and plasticized bamboo-plastic composite material is discharged through the discharge port of the internal mixer body 3 and enters the downstream processing link, such as extrusion molding or injection molding.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bamboo-plastic composite material manufacturing device, characterized in that: include: A lower frame (1), wherein a mixer body (3) is mounted on the top of the lower frame (1), and a rotary bracket (4) is mounted on the top of the lower frame (1) on one side of the mixer body (3), and a trapezoidal discharge box (6) connected to the feed port of the mixer body (3) is mounted inside the rotary bracket (4), and a double-disc multi-arm grinding device (5) for grinding and sieving the crushed 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 the outer wall of one side of the rotary bracket (4), and a control box (2) is mounted on the outer wall of one side of the lower frame (1), and the output end of the control box (2) is electrically connected to the input end of the reduction motor (13); An I-shaped crushing box (7) is fixed at the top of a double-disc multi-arm grinding device (5), and a discharge port at the bottom of the I-shaped crushing box (7) is connected to a feed port of the double-disc multi-arm grinding device (5), and side crushing rollers (701) are rotatably mounted on the front and rear sides of the I-shaped crushing box (7), and a collection box (8) is installed inside the I-shaped crushing box (7), and a central crushing shaft (9) is rotatably mounted inside the collection box (8). The center crushing shaft (9) is located above the two side crushing rollers (701), and the outer walls on both sides of the I-shaped crushing box (7) are provided with a screw adjustment structure (12) for controlling the height of the center crushing shaft (9), a right-angle frame (10) is installed at the movable end of one of the screw adjustment structures (12), and a telescopic spline bidirectional transmission assembly (11) for connecting a double-disc multi-arm grinding device (5) and the center crushing shaft (9) is provided on the inner wall of one side of the right-angle frame (10).

2. The bamboo-plastic composite material manufacturing device according to claim 1, characterized in that: The double-disc multi-arm grinding device (5) comprises an abrasive box (501) fixed at the top of a trapezoidal discharge box (6), an arc-shaped screen liner (502) fixed inside the abrasive box (501), a main transmission shaft (503) rotatably mounted inside the abrasive box (501), and support plates (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 to the output shaft of the reduction motor (13), a gap portion communicating with the internal chamber of the trapezoidal discharge box (6) is provided between the arc-shaped screen liner (502) and the abrasive box (501), a plurality of equally spaced cross arms (505) are installed between two adjacent support plates (504), and a scraper (5051) is installed on the outer wall of the cross arm (505) on the side away from the central axis of the main transmission shaft (503).

3. The bamboo-plastic composite material manufacturing device according to claim 2, characterized in that: The scraper (5051) extends in a wave shape in parallel along the extension direction of the cross arm (505), and bearing seats (506) are installed on both sides of the top of the rotating bracket (4). The main transmission shaft (503) is rotatably installed between the two bearing seats (506), and the central axes of the bearing seat (506) and the arc-shaped screen gall (502) coincide with each other.

4. The bamboo-plastic composite material manufacturing device according to claim 3, characterized in that: An opening for materials to enter is provided at the top of the arc-shaped screen bladder (502), and the support plate (504), the cross arm (505), and the scraper (5051) are all made of stainless steel.

5. The bamboo-plastic composite material manufacturing device according to claim 2, characterized in that: The telescopic spline bidirectional transmission assembly (11) comprises a lower right-angle shaft frame (1101) fixed on the outer wall of one side of the rotating bracket (4), an upper right-angle shaft frame (1102) fixed on the inner wall of one side of the right-angle frame (10), an inner spline shaft (1103) rotatably mounted on the bottom of the right-angle frame (10), and an outer spline shaft (1104) rotatably mounted on the top of the lower right-angle shaft frame (1101), wherein the top of the outer spline shaft (1104) extends into the interior of the inner spline shaft (1103), a second bevel gear transmission structure (1106) for maintaining power connection between the opposite ends of the central crushing shaft (9) and the inner spline shaft (1103), and a first bevel gear transmission structure (1105) for connecting the opposite ends of the main transmission shaft (503) and the outer spline shaft (1104) is disposed inside the lower right-angle shaft frame (1101).

6. The bamboo-plastic composite material manufacturing device according to claim 5, characterized in that: The first bevel gear transmission structure (1105) and the second bevel gear transmission structure (1106) have the same structural composition. 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 mounted on an inner wall of one side of the lower right-angle shaft frame (1101), and the driven bevel gear is rotatably mounted on the top wall of the lower right-angle shaft frame (1101). The bottom end of the external spline shaft (1104) extends to the interior of the lower right-angle shaft frame (1101) and is interconnected with the driven bevel gear. One end of the main transmission shaft (503) extends to the interior of the lower right-angle shaft frame (1101) and is interconnected with the driving bevel gear.

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

8. The bamboo-plastic composite material manufacturing device according to claim 7, characterized in that: Two symmetrical rectangular protruding arms are welded to the bottom of the right-angle frame (10), one end of the rectangular protruding arm extends to the lower surface of the U-shaped seat (1202) and is bolted to the U-shaped seat (1202), and the inner spline shaft (1103) is located between the two rectangular protruding arms.

9. The bamboo-plastic composite material manufacturing device according to claim 7, characterized in that: The outer walls on both sides of the material collecting box (8) are provided with straight hollow grooves for the end of the central crushing shaft (9) to be raised and lowered.

10. A method for manufacturing a bamboo-plastic composite material, comprising the bamboo-plastic composite material manufacturing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S101: The recycled PE material, bamboo fiber, and related additives to be processed are input into a collection box (8), and the reduction motor (13) is turned on through the control box (2) to start working. The rotary power of the reduction motor (13) is first transmitted to the double-disc multi-arm grinding device (5), and the double-disc multi-arm grinding device (5) performs secondary grinding on the recycled PE material and related additives after preliminary crushing. During this process, the double-disc multi-arm grinding device (5) transmits the rotary power to the central crushing shaft (9) through the telescopic spline bidirectional transmission assembly (11). The central crushing shaft (9) and the side crushing rollers (701) in the I-shaped crushing box (7) cooperate to effectively perform preliminary crushing on the PE material and the additives. S102: controlling the distance between the central crushing shaft (9) and the two side crushing rollers (701) by means of a screw distance adjustment structure (12); the smaller the distance between the central crushing shaft (9) and the side crushing rollers (701), the more collisions and compressions the materials will experience in more directions, thereby being refined into smaller particles; 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 dynamically connected via the telescopic spline bidirectional transmission assembly (11), and the recycled PE material, bamboo fiber, related additives and other materials after preliminary crushing enter the double-disc multi-arm grinding device (5). The double-disc multi-arm grinding device (5) helps the materials to be efficiently mixed and ground in multiple directions; S104: After the crushing and mixing are completed, the processed materials enter the internal mixer body (3) for degassing to remove bubbles or volatiles generated in the process. The evenly mixed and plasticized bamboo-plastic composite material is discharged through the discharge port of the internal mixer body (3) and enters the downstream processing link.

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