Bamboo fiber modified asphalt mixture forming device and preparation method thereof

Abstract

This invention discloses a bamboo fiber modified asphalt mixture molding device and its preparation method, relating to the field of asphalt compression molding technology. The device includes an operating table and an upper mold. A feeding assembly is installed on the operating table, comprising an electric telescopic rod fixedly connected to a hollow column. A liquid tank is opened inside the hollow column, and multiple spray holes are evenly distributed on the outer wall and bottom of the hollow column. A liquid pipe is connected to the top of the hollow column, and the liquid pipe communicates with the liquid tank. Through the operation of the feeding assembly, a spraying method that can extend into the lower mold cavity is used to uniformly spray the inner wall and bottom of the lower mold cavity, ensuring that the release agent adheres evenly to every part of the lower mold cavity. This solves the problems of difficult demolding and surface damage of asphalt mixture precast components caused by uneven distribution of the release agent.

Description

Technical Field

[0001] This invention relates to the field of asphalt compression molding technology, specifically to a bamboo fiber modified asphalt mixture molding device and its preparation method. Background Technology

[0002] Bamboo fiber modified asphalt mixture is made by combining bamboo fiber, ceramic fiber and other materials into asphalt mixture. The molding device for the mixture is a special equipment that presses the mixture into precast components of specific shapes and sizes. It is commonly found in hydraulic molding machines. Pressure is applied to the mixture through the upper and lower molds, and finally it is cooled and molded.

[0003] In actual production, the nozzle position of the release agent spraying device of the hydraulic molding machine is fixed, and the coverage of the release agent sprayed is limited. This results in the release agent not being evenly sprayed on the inner wall of the mold. Asphalt mixture itself is highly viscous. If the inner wall of the cavity is not covered with release agent, it is very easy to stick together, which will affect the demolding effect of the asphalt precast components.

[0004] Furthermore, due to the high viscosity of asphalt mixtures, they tend to adhere to the discharge port, causing the actual discharge amount to deviate from the set value. The discharge amount deviation is random. For example, the mixture may adhere to the discharge port, resulting in a discharge amount less than the set value. Or, the adhesive may accumulate to a certain extent and suddenly fall off, resulting in a discharge amount more than the set value. Consequently, the actual material usage of the same batch of asphalt precast components varies significantly, making it impossible to guarantee the consistency of the discharge amount.

[0005] To this end, a bamboo fiber modified asphalt mixture molding device and its preparation method are proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a bamboo fiber modified asphalt mixture molding device and its preparation method to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a bamboo fiber modified asphalt mixture molding device, comprising an operating table and an upper mold, the upper mold being installed on the top of the operating table, a sliding platform being slidably connected to the bottom of the operating table, a cooling mechanism being provided on the sliding platform, a lower mold being installed on the top of the sliding platform, a linear drive assembly being installed at the bottom of the operating table to drive the sliding platform to reciprocate linearly, a feeding processing assembly being provided on the operating table, the feeding processing assembly comprising an electric telescopic rod, the electric telescopic rod being fixedly connected to the operating table, a hollow column being fixedly connected to the telescopic shaft end of the electric telescopic rod, a liquid tank being opened inside the hollow column, a plurality of spray holes being evenly opened on the outer side wall and bottom of the hollow column, a liquid pipe being connected to the top of the hollow column, and the liquid pipe communicating with the liquid tank.

[0008] Furthermore, a feeding pipe is fixedly connected to the top of the operating table, and an electromagnetic metering valve is connected to the feeding pipe. A pressure plate is fixedly connected to the bottom end of the feeding pipe. An electric telescopic rod II is fixedly connected to the operating table. The telescopic shaft end of the electric telescopic rod II is fixedly connected to the top surface of the pressure plate. A frame plate is fitted outside the pressure plate, and the pressure plate and the frame plate are slidably connected. An inner cavity is opened inside the pressure plate, and a feeding port communicating with the feeding pipe is opened on the inner cavity. An insert plate is slidably connected inside the inner cavity, and multiple springs II are installed inside the inner cavity. A guide hole is opened at the top of the pressure plate. A magnet I is fixedly connected to the upper surface of the insert plate away from the upper die. A magnet II is fixedly connected to the top of the frame plate. The magnets I and II have opposite magnetic properties. The two ends of the springs II are fixedly connected to the end of the insert plate near the magnet II and the inner wall of the inner cavity near the magnet II, respectively.

[0009] Furthermore, the linear drive assembly includes a reciprocating lead screw threaded to the bottom of the stage and a servo motor mounted and fixed on the operating table. The output shaft of the servo motor is fixedly connected to the reciprocating lead screw, and the reciprocating lead screw is rotatably connected to the operating table.

[0010] Furthermore, the top of the liquid pipe extends out of the operating table and is connected to the mold release agent supply line.

[0011] Furthermore, four support rods are fixedly connected to the four corners of the top of the frame plate. Each support rod has a guide rod slidably connected to its top end. Each guide rod is fitted with a spring. The bottom end of the guide rod is fixedly connected to the top surface of the pressure plate. The two ends of the spring are fixedly connected to the top end of the support rod and the top surface of the pressure plate, respectively.

[0012] Furthermore, the top of the discharge pipe passes through the operating platform and connects to the asphalt mixture supply pipeline.

[0013] Furthermore, the end of the insert plate near the feed tube is set as an inclined surface.

[0014] The present invention also provides a method for preparing bamboo fiber modified asphalt mixture by molding, using the bamboo fiber modified asphalt mixture molding device described above, the method comprising the following steps:

[0015] Release agent spraying: The linear drive component is started, which moves the moving platform and the lower mold to a position below the electric telescopic rod. Then, the electric telescopic rod extends and sends the hollow column into the cavity of the lower mold. Release agent is injected into the liquid tank through the liquid pipe. Then, the release agent is evenly sprayed onto the inner wall and bottom of the cavity through the spray nozzle. After the spraying is completed, the electric telescopic rod retracts and returns to its original position.

[0016] Asphalt mixture feeding: The linear drive assembly is activated, moving the moving platform and lower mold to directly below the sleeve plate. Then, the electric telescopic rod extends, causing the sleeve plate to move down to contact the top surface of the lower mold. Then, the electromagnetic metering valve opens, and the asphalt mixture is injected into the cavity of the lower mold through the feeding pipe. After the set filling amount is reached, the electromagnetic metering valve automatically closes.

[0017] Further, material pre-compression: The electric telescopic rod 2 continues to extend, driving the pressure plate to move downward on the sleeve plate. Spring 1 is stretched, magnet 1 separates from magnet 2, spring 2 extends, pushes the insert plate to cut off the material adhering to the bottom of the feed tube and seals the feed port of the pressure plate. Then the pressure plate is pressed into the cavity, flattening and compacting the material in the lower mold. After completion, the electric telescopic rod 2 retracts.

[0018] Further, compression molding: The linear drive assembly is activated, moving the lower mold below the upper mold. Then, the hydraulic rod is activated, causing the upper mold to move down and close with the lower mold, thus pressing the asphalt mixture into shape. The cooling mechanism cools the pressed asphalt mixture, causing it to solidify.

[0019] Finished product removal: The hydraulic rod drives the upper mold to move upward and reset, and the precast component is removed.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] Firstly, in existing technologies, due to the fixed position of the nozzle and the limited coverage area, it is impossible to fully spray the inner wall of the lower mold cavity, resulting in uneven adhesion of the release agent.

[0022] By using the material loading and processing components, a spraying method that can extend into the lower mold cavity can be used to uniformly spray the inner wall and bottom of the lower mold cavity, ensuring that the release agent is evenly adhered to every part of the lower mold cavity. This solves the problems of difficult demolding and surface damage of asphalt mixture precast components caused by uneven distribution of release agent.

[0023] Secondly, in the existing technology, asphalt mixtures are highly viscous and tend to stick to the discharge port, which can cause the discharge amount to deviate from the set value, and the deviation is random.

[0024] Through the operation of the feeding and processing components, the baffle plate can cut off the adhesive at the discharge port, ensuring that the actual flow rate of each discharge is consistent with the set value, thus eliminating random deviations in the discharge amount caused by the adhesive residue of asphalt mixture.

[0025] Thirdly, in the existing technology, asphalt mixtures are directly pressed into shape after being fed into the container. Loose materials will have height differences during feeding, which will lead to uneven pressure in various places during the pressing process.

[0026] Through the operation of the feeding and processing components, the pressure plate pre-compresses the asphalt mixture in the lower mold cavity, which can initially compact the loose material and make the surface flat, providing a uniform initial foundation for subsequent high-pressure molding.

[0027] Fourthly, during traditional material feeding, asphalt mixture is prone to splashing out from the edge of the lower mold cavity, causing waste and pollution.

[0028] Through the operation of the feeding process components, the frame plate covers the top of the lower mold cavity to form a closed feeding space, which can effectively prevent asphalt mixture from splashing. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of the overall device of the present invention;

[0030] Figure 2 This is a front view of the overall device of the present invention;

[0031] Figure 3 This is a cross-sectional schematic diagram of the operating table, upper mold, and shifting platform of the present invention.

[0032] Figure 4 This is a cross-sectional schematic diagram of the operating table, upper pressure mold, reciprocating lead screw, and other structures of the present invention.

[0033] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0034] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle;

[0035] Figure 7 For the present invention Figure 4 Enlarged view of point C in the middle;

[0036] Figure 8 This is a cross-sectional schematic diagram of the material feeding pipe, pressure plate, and other structures of the present invention;

[0037] Figure 9 This is a cross-sectional schematic diagram of the material feeding pipe, sleeve plate, and other structures of the present invention;

[0038] Figure 10 For the present invention Figure 9 Enlarged diagram of point D in the middle.

[0039] In the diagram: 11. Control panel; 12. Upper die; 13. Moving table; 14. Lower die; 15. Reciprocating lead screw; 16. Servo motor;

[0040] 21. Electric telescopic rod one; 22. Hollow column; 23. Liquid tank; 24. Spray hole; 25. Liquid pipe; 26. Feed pipe; 28. Pressure plate; 29. ​​Electric telescopic rod two; 210. Sleeve plate; 211. Support rod; 212. Guide rod; 213. Spring one; 214. Inner cavity; 215. Insert plate; 216. Spring two; 217. Guide hole; 218. Magnet one; 219. Magnet two. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0042] The embodiments provided by this invention:

[0043] Example 1: Please refer to Figures 1 to 10 As shown, this embodiment provides a bamboo fiber modified asphalt mixture molding device, including an operating table 11 and an upper mold 12. The upper mold 12 is installed on the top of the operating table 11, and a sliding platform 13 is slidably connected to the bottom of the operating table 11. A cooling mechanism is provided on the sliding platform 13, and a lower mold 14 is installed on the top of the sliding platform 13. A linear drive assembly is installed at the bottom of the operating table 11. The linear drive assembly includes a reciprocating screw 15 threadedly connected to the bottom of the sliding platform 13 and a servo motor 16 installed and fixed on the operating table 11. The output shaft end of the servo motor 16 is fixedly connected to the reciprocating screw 15, and the reciprocating screw 15 is rotatably connected to the operating table 11. Under the rotation of the output shaft of the servo motor 16, the reciprocating movement of the sliding platform 13 on the operating table 11 can be controlled.

[0044] Among them, the upper mold 12 and the lower mold 14 are both existing known technologies. The upper mold 12 and the lower mold 14 work together to press and shape the asphalt mixture.

[0045] Specifically: In the prior art, the upper mold 12 is connected to the operating table 11 by a hydraulic rod. When the asphalt mixture is pressed and molded, the hydraulic rod drives the upper mold 12 to move downward, so that the upper mold 12 and the lower mold 14 close together, and the asphalt mixture in the lower mold 14 is pressed and molded. The cooling mechanism is an existing mechanism. After compression molding, the cooling mechanism cools the lower mold 14, so that the asphalt gradually hardens and the asphalt mixture is formed.

[0046] The operating table 11 is equipped with a feeding processing component, which includes an electric telescopic rod 21. The electric telescopic rod 21 is fixedly connected to the top of the operating table 11. The electric telescopic rod 21 includes a fixed shaft and a telescopic shaft. The telescopic shaft end of the electric telescopic rod 21 faces downward. A hollow column 22 is fixedly connected to the telescopic shaft end of the electric telescopic rod 21. The hollow column 22 includes two layers of cylinders. The inner cylinder is hollow. A liquid tank 23 is formed between the outer cylinder and the inner cylinder. Multiple spray holes 24 are evenly opened on the circumferential surface and bottom surface of the hollow column 22. The spray holes 24 are connected to the liquid tank 23. A liquid pipe 25 is fixedly connected to the top of the hollow column 22. The liquid pipe 25 is connected to the liquid tank 23.

[0047] A feeding pipe 26 is fixedly connected to the top of the operating platform 11. A pressure plate 28 is connected to the bottom end of the feeding pipe 26. An electromagnetic metering valve is connected to the feeding pipe 26. An electric telescopic rod 29 is fixedly connected to the side of the operating platform 11 near the feeding pipe 26. The telescopic shaft end of the electric telescopic rod 29 is fixedly connected to the top surface of the pressure plate 28. A frame plate 210 is fitted over the pressure plate 28. The pressure plate 28 and the frame plate 210 are slidably connected. Four support rods 211 are fixedly connected to the four corners of the top of the frame plate 210. A guide rod 212 is slidably connected to the top of each support rod 211. A spring 213 is fitted on each guide rod 212. (Refer to...) Figure 8 As shown, the bottom end of the guide rod 212 is fixedly connected to the top surface of the pressure plate 28, and the two ends of the spring 213 are fixedly connected to the top end of the support rod 211 and the top surface of the pressure plate 28, respectively.

[0048] The pressure plate 28 has an inner cavity 214, with a discharge port on the inner cavity 214. The bottom end of the discharge pipe 26 communicates with the discharge port. An insert plate 215 is slidably connected inside the inner cavity 214. Multiple springs 216 are installed inside the inner cavity 214. A guide hole 217 is provided at the top of the pressure plate 28, communicating with the inner cavity 214. A magnet 218 is fixedly connected to the upper surface of the insert plate 215, and a magnet 219 is fixedly connected to the top of the frame plate 210. (Refer to...) Figure 7 , Figure 8 As shown, magnet 218 passes through guide hole 217 and is fixedly connected to insert plate 215, and magnet 218 can slide along guide hole 217. The magnetism of magnet 218 is opposite to that of magnet 219. The two ends of spring 216 are fixedly connected to the end of insert plate 215 near magnet 219 and the inner wall of inner cavity 214 near magnet 219, respectively.

[0049] When magnet 218 attracts magnet 219, the insert plate 215 is located in the inner cavity 214 at the end closest to magnet 219, at which point spring 216 is elastically compressed.

[0050] Where: Reference Figure 2 As shown, the upper pressure mold 12, the electric telescopic rod 21, and the feeding pipe 26 are arranged in a straight line on the operating table 11, and photoelectric sensors are installed at the corresponding positions of the three on the operating table 11.

[0051] Where: Reference Figure 5 , Figure 6 As shown, the top end of the liquid pipe 25 extends out of the operating table 11, the top end of the liquid pipe 25 is connected to the mold release agent supply pipeline, the bottom end of the liquid pipe 25 is connected to the liquid tank 23, and multiple spray holes 24 are all connected to the liquid tank 23.

[0052] In summary, when the lower mold 14 is feeding asphalt mixture, the output shaft of the servo motor 16 rotates, causing the reciprocating screw 15 to drive the moving table 13 and the lower mold 14 to move until the lower mold 14 is aligned with the bottom position of the electric telescopic rod 21. The photoelectric sensor below the electric telescopic rod 21 senses whether the lower mold 14 has moved into place. After the lower mold 14 moves into place, the telescopic shaft of the electric telescopic rod 21 extends, causing the hollow column 22 to move downward by the telescopic shaft of the electric telescopic rod 21 until the hollow column 22 enters the cavity inside the lower mold 14. At this time, the release agent supply pipeline delivers release agent to the liquid pipe 25, so that the release agent enters the liquid tank 23 through the liquid pipe 25 and is sprayed into the cavity of the lower mold 14 through the multiple spray holes 24 on the hollow column 22.

[0053] It should be noted that during this process, the multiple spray holes 24 on the side wall and bottom of the hollow column 22 are arranged in a ring and are uniformly arranged. Therefore, the spray holes 24 can spray the release agent evenly around the side wall and bottom of the cavity of the lower mold 14. After the release agent is evenly sprayed into the cavity of the lower mold 14, the telescopic shaft of the electric telescopic rod 21 retracts, driving the hollow column 22 away from the lower mold 14.

[0054] Where: Reference Figure 7 , Figure 8 as well as Figure 10 As shown, the top of the discharge pipe 26 passes through the operating platform 11, and the top of the discharge pipe 26 is connected to the asphalt mixture supply pipeline.

[0055] Where: Reference Figure 7 , Figure 8 As shown, the end of the insert plate 215 near the discharge pipe 26 is set as an inclined surface, which helps the insert plate 215 cut off the asphalt mixture remaining at the bottom of the discharge pipe 26.

[0056] It should be noted that after the lower mold 14 is sprayed with release agent, the output shaft of the servo motor 16 rotates, causing the moving table 13 to move the lower mold 14 to the position aligned with the frame plate 210. The photoelectric sensor under the frame plate 210 senses whether the lower mold 14 has moved into place. After the lower mold 14 moves into place, the telescopic shaft of the electric telescopic rod 29 extends. The telescopic shaft of the electric telescopic rod 29 drives the pressure plate 28 and the electric telescopic rod 29 to move downward synchronously until the bottom end of the frame plate 210 contacts the top surface of the lower mold 14. At this time, the frame plate 210 covers the upper surface of the cavity of the lower mold 14.

[0057] Then, asphalt mixture is injected into the lower feed pipe 26 through the connected asphalt mixture supply pipeline. At the same time, the electromagnetic metering valve is opened, connecting the feed pipe 26 and the inner cavity 214 of the pressure plate 28. At this time, the asphalt mixture is fed into the cavity of the lower mold 14 through the feed pipe 26 and the feed port. During this process, the sleeve plate 210 plays a role in preventing the asphalt mixture from splashing when it is fed.

[0058] During the process of the asphalt mixture entering the cavity of the lower mold 14, the electromagnetic metering valve measures the amount of asphalt mixture being fed. When the asphalt mixture reaches the filling amount of the cavity of the lower mold 14, the electromagnetic metering valve closes, preventing any more asphalt mixture from being injected into the lower mold 14.

[0059] As the electromagnetic metering valve closes, the telescopic shaft of the electric telescopic rod 29 continues to extend. Since the sleeve plate 210 is now against the top of the lower mold 14, it cannot move further downwards. Consequently, as the telescopic shaft of the electric telescopic rod 29 extends, it drives the pressure plate 28 to move downwards inside the sleeve plate 210. As the pressure plate 28 moves downwards, it drives the four guide rods 212 to move downwards synchronously. The four guide rods 212 slide downwards on their corresponding support rods 211, simultaneously stretching the corresponding springs 213. During the downward movement of the pressure plate 28, it also drives the magnet 218 to move downwards synchronously, causing the magnet 218 to no longer... Magnet 219 attracts the spring 216, and magnet 218 no longer restricts the elastic extension of spring 216. At this time, under the elastic extension of spring 216, spring 216 pushes the insert plate 215 to slide towards the side of the feed pipe 26 inside the inner cavity 214. As the insert plate 215 moves, it cuts the asphalt mixture adhering to the bottom of the feed pipe 26 through its inclined surface. The cut asphalt mixture falls downward under the action of gravity. At the same time, as the insert plate 215 moves to the end away from magnet 219 inside the inner cavity 214, it blocks the feed port of pressure plate 28, and the bottom surface of pressure plate 28 forms a flat solid plate.

[0060] As the pressure plate 28 continues to move downward, when the pressure plate 28 is pressed into the cavity of the lower mold 14, the pressure plate 28 squeezes the asphalt mixture in the cavity of the lower mold 14. With the squeezing of the pressure plate 28, the asphalt mixture is gradually flattened and compacted in the cavity of the lower mold 14, so that the asphalt mixture is evenly distributed in the cavity of the lower mold 14.

[0061] Then the telescopic shaft of the electric telescopic rod 29 retracts, and the telescopic shaft of the electric telescopic rod 29 drives the pressure plate 28 to move upward. At the same time as the pressure plate 28 moves upward, the pressure plate 28 slides upward inside the sleeve plate 210. At this time, the spring 213 is gradually elastically reset. When the pressure plate 28 moves to the top position inside the sleeve plate 210, under the magnetic attraction of the magnet 219, the magnet 219 attracts the magnet 218 to move towards the magnet 219 in the guide hole 217. At the same time, the magnet 218 drives the insert plate 215 to slide towards the magnet 219 inside the inner cavity 214. The spring 216 is elastically compressed. When the magnet 219 attracts the insert plate 215, the insert plate 215 is reset.

[0062] Furthermore, as the telescopic shaft of the electric telescopic rod 29 continues to retract, the electric telescopic rod 29 drives the pressure plate 28, the sleeve plate 210 and other structures to move upward and reset.

[0063] In summary, when asphalt mixture needs to be fed into the lower mold 14, the process involves spraying a release agent, feeding the asphalt mixture, and flattening and compacting it. Once these three steps are completed, the feeding of the lower mold 14 is finished. Then, the output shaft of the servo motor 16 rotates, causing the moving table 13 to move the lower mold 14 to the position aligned with the upper mold 12. The photoelectric sensor below the upper mold 12 senses whether the lower mold 14 has moved into place. After the lower mold 14 has moved into place, the upper mold 12 closes with the lower mold 14 under the operation of the hydraulic rod, pressing the asphalt mixture in the cavity of the lower mold 14 into shape.

[0064] In summary, the operation of the feeding and handling components can produce the following beneficial effects:

[0065] Firstly, in the existing technology, due to the fixed angle and position of the nozzle, the coverage area is limited, making it impossible to fully spray the inner wall of the lower mold cavity 14, resulting in uneven adhesion of the release agent.

[0066] By using the material feeding assembly, a spraying method that can extend into the cavity of the lower mold 14 can be used to uniformly spray the inner wall and bottom of the cavity of the lower mold 14, ensuring that the release agent is evenly adhered to every part of the cavity of the lower mold 14. This solves the problem of difficult demolding and surface damage of asphalt mixture precast components caused by uneven distribution of release agent.

[0067] Secondly, in the existing technology, asphalt mixtures are highly viscous and tend to stick to the discharge port, which can cause the discharge amount to deviate from the set value, and the deviation is random.

[0068] Through the operation of the feeding processing component, the insert plate 215 can cut off the adhesive at the discharge port, ensuring that the actual flow rate of each discharge is consistent with the set value, and eliminating random deviations in the discharge amount caused by the adhesive residue of asphalt mixture.

[0069] Thirdly, in the existing technology, asphalt mixtures are directly pressed into shape after being fed into the container. Loose materials will have height differences during feeding, which will lead to uneven pressure in various places during the pressing process.

[0070] Through the operation of the feeding process components, the pressure plate 28 pre-compresses the asphalt mixture in the cavity of the lower mold 14, which can initially compact the loose material and make the surface flat, providing a uniform initial foundation for subsequent high-pressure molding.

[0071] Fourthly, during traditional material feeding, asphalt mixture is prone to splashing out from the edge of the cavity of the lower mold 14, causing waste and pollution.

[0072] Through the operation of the feeding process component, the frame plate 210 covers the top of the cavity of the lower mold 14 to form a closed feeding space, which can effectively prevent asphalt mixture from splashing.

[0073] Example 2: This example provides a method for preparing bamboo fiber modified asphalt mixture by molding. This method utilizes the bamboo fiber modified asphalt mixture molding device provided in Example 1 above, and includes the following steps:

[0074] Step 1, Mold release agent spraying: Servo motor 16 starts, driving the moving platform 13 and lower mold 14 to move below the electric telescopic rod 21. Then the electric telescopic rod 21 extends, sending the hollow column 22 into the cavity of the lower mold 14. Mold release agent is injected into the liquid tank 23 through the liquid pipe 25. Then, the mold release agent is evenly sprayed onto the inner wall and bottom of the cavity through the spray hole 24. After the spraying is completed, the electric telescopic rod 21 retracts and resets.

[0075] Step 2, asphalt mixture feeding: Servo motor 16 starts, moving the shifting platform 13 and lower mold 14 to directly below the frame plate 210. Then, the electric telescopic rod 29 extends, driving the frame plate 210 to move down and touch the top surface of the lower mold 14. Then, the electromagnetic metering valve opens, and the asphalt mixture is injected into the cavity of the lower mold 14 through the feeding pipe 26. After the set filling amount is reached, the electromagnetic metering valve automatically closes.

[0076] Step 3, material pre-compression: The electric telescopic rod 29 continues to extend, driving the pressure plate 28 to move downward on the frame plate 210. The spring 213 is stretched, the magnet 218 separates from the magnet 219, the spring 216 extends, pushing the insert plate 215 to cut off the material adhering to the bottom of the feed tube 26 and block the feed port of the pressure plate 28. Then the pressure plate 28 is pressed into the cavity, flattening and compacting the material in the lower mold 14. After completion, the electric telescopic rod 29 retracts, and all components are reset.

[0077] Step 4, pressing and molding: The servo motor 16 is started, moving the lower mold 14 below the upper mold 12. Then the hydraulic rod is started, causing the upper mold 12 to move down and close with the lower mold 14, pressing the asphalt mixture into shape. The cooling mechanism cools the pressed asphalt mixture, causing it to solidify.

[0078] Step 5, Finished product removal: The hydraulic rod drives the upper mold 12 to move upward and reset, and the workers or other gripping mechanisms remove the precast components.

[0079] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0080] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bamboo fiber modified asphalt mixture molding device, comprising an operating table (11) and an upper mold (12), the upper mold (12) being installed on the top of the operating table (11), a sliding platform (13) being slidably connected to the bottom of the operating table (11), a cooling mechanism being provided on the sliding platform (13), and a lower mold (14) being installed on the top of the sliding platform (13), characterized in that: The bottom of the operating table (11) is equipped with a linear drive assembly that can drive the moving table (13) to reciprocate linearly. The operating table (11) is equipped with a feeding processing assembly, which includes an electric telescopic rod (21). The electric telescopic rod (21) is fixedly connected to the operating table (11). The telescopic shaft end of the electric telescopic rod (21) is fixedly connected to a hollow column (22). A liquid tank (23) is opened inside the hollow column (22). Multiple spray holes (24) are evenly opened on the outer wall and bottom of the hollow column (22). A liquid pipe (25) is connected to the top of the hollow column (22). The liquid pipe (25) is connected to the liquid tank (23). A feeding pipe (26) is fixedly connected to the top of the operating table (11). An electromagnetic metering valve is connected to the feeding pipe (26). A pressure plate (28) is fixedly connected to the bottom end of the feeding pipe (26). An electric telescopic rod (29) is fixedly connected to the operating table (11). The telescopic shaft end of the electric telescopic rod (29) is fixedly connected to the top surface of the pressure plate (28). A frame plate (210) is fitted outside the pressure plate (28). The pressure plate (28) and the frame plate (210) are slidably connected. An inner cavity (214) is opened inside the pressure plate (28). A feeding port communicating with the feeding pipe (26) is opened on the inner cavity (214). 14) An insert plate (215) is slidably connected inside. Multiple springs (216) are provided inside the inner cavity (214). A guide hole (217) is opened on the top of the pressure plate (28). A magnet (218) is fixedly connected to the upper surface of the insert plate (215) away from the upper mold (12). A magnet (219) is fixedly connected to the top of the frame plate (210). The magnets (218) and (219) have opposite magnetic properties. The two ends of the springs (216) are fixedly connected to the end of the insert plate (215) near the magnet (219) and the inner wall of the inner cavity (214) near the magnet (219), respectively.

2. The bamboo fiber modified asphalt mixture molding device according to claim 1, characterized in that: The linear drive assembly includes a reciprocating lead screw (15) threaded to the bottom of the moving table (13) and a servo motor (16) mounted and fixed on the operating table (11). The output shaft end of the servo motor (16) is fixedly connected to the reciprocating lead screw (15), and the reciprocating lead screw (15) is rotatably connected to the operating table (11).

3. The bamboo fiber modified asphalt mixture molding device according to claim 1, characterized in that: The liquid pipe (25) extends out of the operating table (11) and is then connected to the mold release agent supply line.

4. The bamboo fiber modified asphalt mixture molding device according to claim 1, characterized in that: Four support rods (211) are fixedly connected to the top four corners of the frame plate (210). Each support rod (211) has a guide rod (212) slidably connected to its top end. Each guide rod (212) is fitted with a spring (213). The bottom end of the guide rod (212) is fixedly connected to the top surface of the pressure plate (28). The two ends of the spring (213) are fixedly connected to the top end of the support rod (211) and the top surface of the pressure plate (28), respectively.

5. The bamboo fiber modified asphalt mixture molding device according to claim 1, characterized in that: The top of the feed pipe (26) passes through the operating table (11) and then connects to the asphalt mixture supply pipeline.

6. The bamboo fiber modified asphalt mixture molding device according to claim 1, characterized in that: The end of the insert plate (215) near the feed tube (26) is set as an inclined surface.

7. A method for preparing bamboo fiber modified asphalt mixture, characterized in that: The method using the bamboo fiber modified asphalt mixture molding apparatus as described in any one of claims 1-6 includes the following steps: Release agent spraying: The linear drive assembly is started, which moves the moving platform (13) and the lower mold (14) to below the electric telescopic rod (21). Then the electric telescopic rod (21) extends and sends the hollow column (22) into the cavity of the lower mold (14). The release agent is injected into the liquid tank (23) through the liquid pipe (25). Then the release agent is evenly sprayed on the inner wall and bottom of the cavity through the spray hole (24). After the spraying is completed, the electric telescopic rod (21) retracts and resets. Asphalt mixture feeding: The linear drive assembly is started, moving the moving platform (13) and the lower mold (14) to directly below the frame plate (210). Then the electric telescopic rod (29) extends, driving the frame plate (210) to move down to contact the top surface of the lower mold (14). Then the electromagnetic metering valve opens, and the asphalt mixture is injected into the cavity of the lower mold (14) through the feeding pipe (26). After the set filling amount is reached, the electromagnetic metering valve automatically closes.

8. The method for preparing bamboo fiber modified asphalt mixture according to claim 7, characterized in that: Material pre-compression: The electric telescopic rod 2 (29) continues to extend, driving the pressure plate (28) to move downward on the frame plate (210). The spring 1 (213) is stretched, the magnet 1 (218) separates from the magnet 2 (219), the spring 2 (216) extends, pushes the insert plate (215) to cut off the material adhering to the bottom of the feed tube (26) and seal the feed port of the pressure plate (28). Then the pressure plate (28) is pressed into the cavity, flattening and compacting the material in the lower mold (14). After completion, the electric telescopic rod 2 (29) retracts.

9. The method for preparing bamboo fiber modified asphalt mixture according to claim 8, characterized in that: pressing molding: the linear drive component is started, the lower mold (14) is moved below the upper mold (12), and then the hydraulic rod is started, so that the upper mold (12) moves down and closes with the lower mold (14) to press the asphalt mixture into shape, and the cooling mechanism cools the pressed asphalt mixture to solidify the asphalt mixture; Finished product removal: The hydraulic rod drives the upper mold (12) to move upward and reset, and the precast component is removed.

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