Soundproofing multi-ply plywood and method of making same

Abstract

This invention provides a sound-insulating multi-layer plywood and its preparation method, belonging to the field of board manufacturing technology. It solves the technical problems of existing sound-insulating multi-layer plywood, such as a single sound insulation layer, poor sound insulation effect, low preparation efficiency, and high labor intensity for workers. This sound-insulating multi-layer plywood is made by hot-pressing and gluing two symmetrically distributed outer panel components and a filler sound insulation layer disposed between the two outer panel components. The outer panel components are made by hot-pressing and gluing a waterproof board, a sound insulation board, and a fiberboard arranged sequentially from the outside to the inside. Through double sound insulation, the sound insulation effect is greatly improved, and it also has the advantages of good waterproofing and gluing effect. The preparation method of this sound-insulating multi-layer plywood includes the following steps: semi-finished product preparation; conveying and feeding of the outer panel components; filling and dispensing of the sound insulation layer; pressing and molding; finished product conveying; enabling automated conveying, unloading, and hot-pressing operations, improving preparation efficiency and reducing the labor intensity of workers.

Description

Technical Field

[0001] This invention belongs to the field of board preparation technology, and relates to a sound-insulating multilayer plywood and its preparation method. Background Technology

[0002] Industrialization and urbanization have led to noise pollution becoming a global problem, second only to air pollution in my country. The increasing severity of noise pollution poses a significant threat to people's work, study, and physical and mental health. As a result, sound insulation panels have been widely used. As the name suggests, a sound insulation panel is a type of panel designed to provide sound insulation. However, sound insulation panels cannot block all frequencies of sound. Objects have inherent resonant frequencies, and the sound insulation effect of the panel is significantly reduced when the sound is close to the object's resonant frequency.

[0003] Existing sound-insulating multi-layer plywood is usually formed by simply gluing and hot-pressing sound-insulating materials and plywood with adhesive. This type of board has a single sound insulation layer and poor sound insulation effect. This type of board is usually made by manually applying adhesive to bond the sound insulation materials and plywood, and then hot-pressing them with a hot press. This preparation method has low production efficiency and high labor intensity for workers.

[0004] A search revealed a method for preparing multi-layer plywood in Chinese patent literature [Application No.: 201911151215.2; Publication No.: CN110861170B]. This method includes the following steps: cutting wood into sawdust, wood particles, or shavings, drying them, soaking them in an insect repellent solution for a period of time, removing them and air-drying them naturally, then soaking them in the insect repellent solution again and removing them to dry them to obtain plywood raw materials; firstly, laying the plywood raw materials flat, spraying adhesive on them, laying a layer of sound insulation material, spraying adhesive on the surface, laying another layer of plywood raw materials, and pressing them to form a primary plywood; cutting several arc-shaped grooves on both sides of the primary plywood using metal wire, spraying adhesive on the top and bottom sides of the primary plywood and laying plywood raw materials on them, and pressing them to synthesize a secondary plywood; repeating this process several times to form a multi-layer plywood, drying it, spraying an anti-mildew solution onto the synthesized multi-layer plywood, and drying it to obtain the finished plywood product.

[0005] The preparation method and the multi-layer plywood disclosed in the patent have sound insulation effects, but the sound insulation layer is single and the sound insulation effect is not good. Moreover, the preparation method has a low degree of automation, high labor intensity, and low board production efficiency.

[0006] Based on this, we propose a sound-insulating multi-layer plywood that achieves double sound insulation, greatly improving the sound insulation effect; it also has waterproof function, expanding its application range and practical value. The preparation method of this sound-insulating multi-layer plywood allows for simultaneous hot pressing of all six sides, improving the hot-pressing quality; it enables the preparation and transportation of sound-insulating filler fluid, and allows for the smoothing and even distribution of the poured sound-insulating filler fluid, accelerating the filling of the molding cavity and improving preparation efficiency; it enables automated conveying and feeding of semi-finished products, and automated unloading and output of finished products, reducing the labor intensity of workers and improving preparation efficiency. Summary of the Invention

[0007] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a sound-insulating multi-layer plywood and its preparation method. The technical problem to be solved by this invention is: how to prepare a sound-insulating multi-layer plywood with high quality and efficiency, while the sound-insulating multi-layer plywood has the advantages of double sound insulation, waterproofing and good bonding effect.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A sound-insulating multi-layer plywood is made by hot-pressing and gluing two symmetrically distributed outer panel assemblies and a filler sound insulation layer disposed between the two outer panel assemblies. The outer panel assemblies are made by hot-pressing and gluing a waterproof board, a sound insulation board and a fiberboard arranged sequentially from the outside to the inside. The waterproof board is made of high molecular polymer as the basic raw material, the sound insulation board is made of glass wool, the fiberboard is made of wood fiber, and the filler sound insulation layer is made by hot-pressing a mixture of rock wool particles and adhesive in a certain proportion.

[0010] By using a filler sound insulation layer, the density difference between the filler and the adjacent board can be increased, thus increasing sound energy consumption and improving the sound insulation effect. By combining the sound insulation board and the filler sound insulation layer, double sound insulation can be achieved, which greatly improves the sound insulation effect.

[0011] By combining the filler sound insulation layer with fiberboard, the adhesion effect can be improved, making the bonding easier and increasing the strength of the sound insulation plywood.

[0012] The addition of a waterproof board enables the plywood to be waterproof, thus expanding its application range and practical value.

[0013] A method for preparing a sound-insulating multilayer plywood includes the following steps:

[0014] Step 1, Semi-finished product preparation: Apply adhesive to both the top and bottom sides of the sound insulation board, and then glue the waterproof board and fiberboard to the top and bottom sides of the sound insulation board respectively. Glue and pre-press them, and cut them into the required size to obtain the outer panel assembly; mix the rock wool particles and adhesive in a certain proportion through a stirring and conveying mechanism to form a sound insulation filler fluid.

[0015] Step 2, conveying and feeding of outer panel components: The outer panel components are placed with the waterproof board facing down as the positive orientation. The outer panel components are placed alternately on the conveyor with the positive and negative orientations. The first outer panel component is placed positively and is conveyed to the designated position by the conveyor. The positively placed outer panel components are transported to the hot pressing lifting mechanism by the loading and unloading mechanism. The two short side wall hot pressing mechanisms and the two long side wall hot pressing mechanisms abut against the four sides of the positively placed outer panel components and form a molding cavity.

[0016] Step 3, filling and spreading of the sound insulation layer: The sound insulation filler fluid is transported into the molding cavity by the stirring and conveying mechanism, and the sound insulation filler fluid is spread evenly by the spreading mechanism so that the sound insulation fluid is spread evenly on the fiberboard of the upright outer panel assembly.

[0017] Step 4, Pressing and Shaping: The second, reverse-positioned outer panel assembly is transported to the top of the filler sound insulation layer through the loading and unloading mechanism. The outer panel assembly is pressed together by the top hot pressing mechanism and the hot pressing lifting mechanism to form a sound insulation multi-layer plywood finished product.

[0018] Step 5: Finished Product Conveying: Reset the top hot pressing mechanism, the two short side wall hot pressing mechanisms, and the two long side wall hot pressing mechanisms. Use the hot pressing lifting mechanism to lower the finished plate on the hot pressing base to the designated position. Use the electric push rod to push the finished plate onto the finished product conveyor. Use the finished product conveyor to output and collect the finished plate. Use the hot pressing lifting mechanism to reset the hot pressing base and continue making the next plate.

[0019] A method for preparing sound-insulating multilayer plywood includes a finished product hot pressing device. The finished product hot pressing device includes an installation platform, a top hot pressing mechanism, a hot pressing lifting mechanism, a loading and unloading mechanism, a material feeding mechanism, a hot pressing base, a finished product conveyor, and a material conveyor. The hot pressing lifting mechanism is located in the middle of the installation platform. The top hot pressing mechanism and the loading and unloading mechanism are located on the front and rear sides of the installation platform, respectively. The material feeding mechanism is located on the right side of the installation platform. The material conveyor is located to the lower right of the loading and unloading mechanism. The finished product conveyor is located to the lower right of the hot pressing lifting mechanism. The top of the installation platform is provided with two symmetrically distributed short side plates and two symmetrically distributed long side plates. Each short side plate is provided with a short side wall hot pressing mechanism, and each long side plate is provided with a long side wall hot pressing mechanism. The two long side wall hot pressing mechanisms are located on the front and rear sides of the hot pressing lifting mechanism, respectively. The two short side wall hot pressing mechanisms are located on the left and right sides of the hot pressing lifting mechanism, respectively. A stirring and conveying mechanism is provided on the upper surface of the installation platform. An electric push rod is fixed to the bottom of the installation platform. A push plate is fixed to the telescopic end of the electric push rod. An air pump and several air jets are provided at the lower end of the installation platform.

[0020] Using the above structure, rock wool particles and adhesives are mixed in a certain proportion by a mixing and conveying mechanism to form a sound-insulating filler fluid;

[0021] The outer panel assembly is placed with the waterproof membrane facing down as the positive orientation. The outer panel assemblies are placed alternately on the conveyor with the positive and negative orientations. The first outer panel assembly is placed positively and is transported to the designated position by the conveyor. The positively placed outer panel assembly is first transported to the hot pressing lifting mechanism by the loading and unloading mechanism. The two short side wall hot pressing mechanisms and the two long side wall hot pressing mechanisms abut against the four sides of the positively placed outer panel assembly and form a molding cavity.

[0022] The sound insulation filler fluid is transported into the molding cavity by the stirring and conveying mechanism, and the sound insulation filler fluid is evenly spread by the material spreading mechanism, so that the sound insulation fluid is spread flat on the fiberboard of the upright outer panel assembly.

[0023] The second, reverse-positioned outer panel assembly is transported to the top of the filler sound insulation layer via the loading and unloading mechanism. The outer panel assembly is then pressed together by the top hot pressing mechanism and the hot pressing lifting mechanism to form a finished sound insulation multilayer plywood product.

[0024] The top hot pressing mechanism, the two short side wall hot pressing mechanisms, and the two long side wall hot pressing mechanisms are reset. The finished board is lowered to the designated position by the hot pressing lifting mechanism. The finished board is pushed onto the finished product conveyor by an electric push rod. The finished board is output and collected by the finished product conveyor. The hot pressing lifting mechanism is reset, and the production of the next board continues. The finished board and the finished product conveyor are cooled by an air pump and several jet nozzles to improve safety.

[0025] The hot-press lifting mechanism includes a fixed frame, a hot-press base, and several evenly distributed hydraulic rods. The telescopic ends of the hydraulic rods are fixedly connected to the bottom of the hot-press base, and the fixed ends of the hydraulic rods are fixedly connected to the fixed frame. An electric push rod is located on the left side of the fixed frame, and the finished product conveyor is located on the right side of the fixed frame.

[0026] Using the above structure, after the sound-insulating multi-layer plywood is hot-pressed, the hydraulic rod is activated. The telescopic end of the hydraulic rod retracts, causing the hot-press base to descend until the upper surface of the hot-press base is flush with the lower surface of the push plate. Then, the electric push rod one is activated, and the telescopic end of the electric push rod one extends, causing the push plate to move. The push plate pushes the finished sound-insulating multi-layer plywood onto the finished product conveyor. The finished product conveyor is then activated to output and collect the sound-insulating multi-layer plywood.

[0027] The short sidewall hot pressing mechanism includes a mounting frame fixed to the short side plate. A power supply box is mounted on the mounting frame, and a control console is mounted on the side wall of the mounting frame. An electric push rod is located at the top center of the mounting frame, and a limit seat is fixed to the top side of the mounting frame. The electric push rod is located in the middle of the limit seat, and its telescopic end extends to the outside of the limit seat and is fixed with a heat insulation plate. A hot pressing plate is fixed on the heat insulation plate. Both the electric push rod and the control console are electrically connected to the power supply box. The long sidewall hot pressing mechanism has the same structure as the short sidewall hot pressing mechanism, but the hot pressing plate of the long sidewall hot pressing mechanism has a different size than that of the short sidewall hot pressing mechanism.

[0028] Using the above structure, the four electric push rods are activated via the control console. The telescopic ends of the four electric push rods extend and drive the corresponding heat insulation plates and hot press plates to move until the four hot press plates respectively abut against the outer walls of the outer panel assembly. The size of the four hot press plates is adjusted and replaced according to the size of the sound insulation multilayer plywood.

[0029] The top hot pressing mechanism, loading / unloading mechanism, and feeding mechanism all include a rotary lifting assembly. The rotary lifting assembly includes a fixed column, with a mounting base fixed to the end of the fixed column. A turntable is rotatably connected to the top of the mounting base. A power motor is fixed to the side wall of the mounting base. The output shaft of the power motor is connected to the turntable via a gear set. A slide rail is fixed to the top of the turntable. A rotary motor is fixed to the side wall of the slide rail. A lead screw is rotatably connected inside the slide rail. The output shaft of the rotary motor is connected to the lead screw via a coupling. A sliding seat is slidably connected inside the slide rail. The sliding seat is threadedly connected to the lead screw. A mounting plate is fixed to the bottom of the sliding seat. Several hydraulic cylinders are evenly distributed at equal intervals at the bottom of the mounting plate.

[0030] With the above structure, the power motor is started, and the output shaft of the power motor drives the turntable to rotate through the gear set. The turntable drives the slide rail to rotate until it reaches the designated position. The rotary motor is then started, and the output shaft of the rotary motor drives the lead screw to rotate through the coupling. The lead screw drives the sliding seat to slide, and the sliding seat drives the mounting plate to move until it moves to the designated lateral position.

[0031] The top hot pressing mechanism also includes a heat-insulating top plate and a hot pressing top plate. The heat-insulating top plate is fixedly connected to the telescopic end of the hydraulic cylinder of the top hot pressing mechanism. The hot pressing top plate is fixed on the heat-insulating top plate. The loading and unloading mechanism also includes several suction cups. The suction cups are fixedly connected to the telescopic ends of the hydraulic cylinders at corresponding positions of the loading and unloading mechanism. The material feeding mechanism also includes a connecting seat. The connecting seat is fixedly connected to the telescopic end of the hydraulic cylinder of the material feeding mechanism. A material feeding rake is fixed at the lower end of the connecting seat.

[0032] Using the above structure, during loading and unloading, the hydraulic cylinder of the loading and unloading mechanism is activated. The telescopic end of the hydraulic cylinder of the loading and unloading mechanism drives the suction cup to move. The suction cup, in conjunction with the air pump, picks up the plate and then moves the plate to the designated position through the rotary lifting assembly. During hot pressing, the hydraulic cylinder of the top hot pressing mechanism is activated. The telescopic end of the hydraulic cylinder of the top hot pressing mechanism drives the heat insulation top plate and the hot pressing top plate to move until the hot pressing top plate abuts against the outer plate assembly. During material removal, the hydraulic cylinder of the material removal mechanism is activated. The telescopic end of the hydraulic cylinder of the material removal mechanism drives the connecting seat to move. The connecting seat drives the material removal rake to the designated height, and then the rotary lifting assembly drives the material removal rake to move laterally to remove the material.

[0033] The mixing and conveying mechanism includes a transmission frame and a mixing frame, both fixed to the upper surface of the mounting platform. A mixing motor and a mixing tank are fixed on the mixing frame. A discharge port is located at the bottom of the mixing tank. A mixing paddle is rotatably connected inside the mixing tank. The output shaft of the mixing motor is connected to the mixing paddle via a pulley assembly. A valve motor and two rotating seats are fixed to the side wall of the mixing tank. A rotating shaft is rotatably connected between the two rotating seats. A baffle is fixed to the lower end of the rotating shaft, and the upper end of the rotating shaft is connected to the output shaft of the valve motor via a connecting bearing. The baffle abuts against... The bottom of the mixing tank is located directly below the discharge port. A baffle hopper is fixed on the side wall of one end of the transmission frame. A driven roller is rotatably connected between the two side walls of this end. The baffle hopper is located directly below the baffle. Several evenly distributed drive rollers are fixed on the transmission frame. A transmission motor is fixed on the top of the other end of the transmission frame. A drive roller is rotatably connected between the two inner walls of this end. The output shaft of the transmission motor is driven by the drive roller through a pulley set. A concave transmission belt is driven between the drive roller and the driven roller. Several drive rollers abut against the bottom of the concave transmission belt.

[0034] Using the above structure, a certain proportion of rock wool granules and adhesive are injected into the mixing tank. The mixing motor is started, and the output shaft of the mixing motor drives the mixing paddle to rotate through the pulley set, mixing the rock wool granules and adhesive until the rock wool granules and adhesive form a sound-insulating filler fluid. The valve motor is started, and the output shaft of the valve motor drives the rotating shaft to rotate through the connecting bearing. The rotating shaft drives the baffle to rotate, so that the baffle no longer blocks the discharge port. The sound-insulating filler fluid flows from the discharge port onto the concave conveyor belt. The baffle hopper can prevent the sound-insulating filler fluid from spilling. The transmission motor is started, and the output shaft of the transmission motor drives the drive roller to rotate through the pulley set. Through the cooperation of the drive roller, transmission roller, driven roller and concave conveyor belt, the sound-insulating filler fluid is transported into the molding cavity.

[0035] Compared with existing technologies, this sound-insulating multilayer plywood has the following advantages:

[0036] By using a filler sound insulation layer, the density difference between the filler and the adjacent board can be increased, thus increasing sound energy consumption and improving the sound insulation effect. By combining the sound insulation board and the filler sound insulation layer, double sound insulation can be achieved, which greatly improves the sound insulation effect.

[0037] By combining the filler sound insulation layer with fiberboard, the adhesion effect can be improved, making the bonding easier and increasing the strength of the sound insulation plywood.

[0038] The addition of a waterproof board enables the plywood to be waterproof, thus expanding its application range and practical value.

[0039] Compared with existing technologies, the preparation method of this sound-insulating multilayer plywood has the following advantages:

[0040] By coordinating the hot pressing lifting mechanism, two short side wall hot pressing mechanisms, two long side wall hot pressing mechanisms, and the top hot pressing mechanism, the six sides of the sound-insulating multi-layer plywood can be hot-pressed simultaneously, thereby improving the hot pressing forming quality of the sound-insulating multi-layer plywood.

[0041] The mixing and conveying mechanism can complete the preparation and conveying of the sound insulation filler fluid. The material feeding mechanism can agitate and scrape the poured sound insulation filler fluid evenly, accelerate the filling of the sound insulation filler fluid into the molding cavity, and improve the preparation efficiency.

[0042] By cooperating with the conveyor and loading / unloading mechanism, the automated conveying and loading of semi-finished products can be achieved. By cooperating with the thermostatic lifting mechanism, electric push rod, push plate and finished product conveyor, the automated unloading and output of finished products can be achieved, reducing the labor intensity of workers and optimizing the working environment. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the sound-insulating multilayer plywood in this invention.

[0044] Figure 2 This is a three-dimensional structural diagram of the hot pressing equipment for finished products in this invention.

[0045] Figure 3 This is a three-dimensional structural diagram of the hot-press lifting mechanism and the mounting platform in this invention.

[0046] Figure 4 This is a three-dimensional structural diagram of the loading and unloading mechanism in this invention.

[0047] Figure 5 This is a three-dimensional structural diagram of the short sidewall hot pressing mechanism in this invention.

[0048] Figure 6 This is a three-dimensional structural diagram of the stirring and conveying mechanism in this invention.

[0049] Figure 7This is a flow chart of the production process of the sound-insulating multi-layer plywood in this invention.

[0050] In the diagram, 1. Mounting platform; 2. Long sidewall hot pressing mechanism; 3. Top hot pressing mechanism; 4. Hot pressing lifting mechanism; 5. Short sidewall hot pressing mechanism; 6. Mixing and conveying mechanism; 7. Loading and unloading mechanism; 8. Material feeding mechanism; 9. Hot pressing base; 10. Finished product conveyor; 11. Electric push rod one; 12. Hydraulic rod; 13. Fixed column; 14. Mounting seat; 15. Rotary motor; 16. Turntable; 17. Power motor; 18. Slide rail; 19. Mounting plate; 20. Suction cup; 21. Sliding seat; 22. Hydraulic cylinder; 23. Mounting frame; 24. Hot pressing plate; 5. Electric push rod II; 26. Limit seat; 27. Control console; 28. Power supply box; 29. ​​Mixing motor; 30. Mixing tank; 31. Mixing paddle; 32. Connecting bearing; 33. Rotating seat; 34. Rotating shaft; 35. Baffle hopper; 36. Concave conveyor belt; 37. Conveyor motor; 38. Drive roller; 39. Transmission roller; 40. Conveyor frame; 41. Driven roller; 42. Baffle; 43. Mixing frame; 44. Waterproof board; 45. Sound insulation board; 46. Fiberboard; 47. Filler sound insulation layer; 48. Conveyor; 49. Connecting seat; 50. Material rake. Detailed Implementation

[0051] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0052] like Figure 1 As shown, this sound-insulating multi-layer plywood is made by hot-pressing and gluing together two symmetrically distributed outer panel assemblies and a filler sound insulation layer 47 disposed between the two outer panel assemblies. The outer panel assemblies are made by hot-pressing and gluing together a waterproof board 44, a sound insulation board 45 and a fiberboard 46 arranged sequentially from the outside to the inside. The waterproof board 44 is made of high molecular polymer as the basic raw material, the sound insulation board 45 is made of glass wool, and the fiberboard 46 is made of wood fiber. The filler sound insulation layer 47 is made by hot-pressing a mixture of rock wool particles and adhesive in a certain proportion.

[0053] In summary, the filler sound insulation layer 47 increases the density difference with adjacent panels, increases sound energy consumption, and improves the sound insulation effect. The combination of the sound insulation board 45 and the filler sound insulation layer 47 can achieve double sound insulation, which greatly improves the sound insulation effect.

[0054] By combining the filler sound insulation layer 47 and the fiberboard 46, the adhesion effect can be improved, making the adhesion easier and increasing the strength of the sound insulation plywood.

[0055] The waterproof board 44 enables the plywood to have waterproof properties, thereby increasing its application range and practical value.

[0056] like Figures 2-7 As shown, the preparation method of this sound-insulating multilayer plywood includes the following steps:

[0057] Step 1, Semi-finished product preparation: Apply adhesive to both the top and bottom sides of the sound insulation board, and then glue the waterproof board and fiberboard to the top and bottom sides of the sound insulation board respectively. Glue and pre-press them, and cut them into the required size to obtain the outer panel assembly; mix the rock wool particles and adhesive in a certain proportion through a stirring and conveying mechanism to form a sound insulation filler fluid.

[0058] Step 2, conveying and feeding of outer panel components: The outer panel components are placed with the waterproof board facing down as the positive orientation. The outer panel components are placed alternately on the conveyor with the positive and negative orientations. The first outer panel component is placed positively and is conveyed to the designated position by the conveyor. The positively placed outer panel components are transported to the hot pressing lifting mechanism by the loading and unloading mechanism. The two short side wall hot pressing mechanisms and the two long side wall hot pressing mechanisms abut against the four sides of the positively placed outer panel components and form a molding cavity.

[0059] Step 3, filling and spreading of the sound insulation layer: The sound insulation filler fluid is transported into the molding cavity by the stirring and conveying mechanism, and the sound insulation filler fluid is spread evenly by the spreading mechanism so that the sound insulation fluid is spread evenly on the fiberboard of the upright outer panel assembly.

[0060] Step 4, Pressing and Shaping: The second, reverse-positioned outer panel assembly is transported to the top of the filler sound insulation layer through the loading and unloading mechanism. The outer panel assembly is pressed together by the top hot pressing mechanism and the hot pressing lifting mechanism to form a sound insulation multi-layer plywood finished product.

[0061] Step 5: Finished Product Conveying: Reset the top hot pressing mechanism, the two short side wall hot pressing mechanisms, and the two long side wall hot pressing mechanisms. Use the hot pressing lifting mechanism to lower the finished plate on the hot pressing base to the designated position. Use the electric push rod to push the finished plate onto the finished product conveyor. Use the finished product conveyor to output and collect the finished plate. Use the hot pressing lifting mechanism to reset the hot pressing base and continue making the next plate.

[0062] The method for preparing this sound-insulating multilayer plywood includes a finished product hot pressing device. The finished product hot pressing device includes a mounting platform 1, a top hot pressing mechanism 3, a hot pressing lifting mechanism 4, a loading and unloading mechanism 7, a material feeding mechanism 8, a hot pressing base 9, a finished product conveyor 10, and a conveyor 48. The hot pressing lifting mechanism 4 is located in the middle of the mounting platform 1. The top hot pressing mechanism 3 and the loading and unloading mechanism 7 are located on the front and rear sides of the mounting platform 1, respectively. The material feeding mechanism 8 is located on the right side of the mounting platform 1. The conveyor 48 is located to the lower right of the loading and unloading mechanism 7. The finished product conveyor 10 is located to the lower right of the hot pressing lifting mechanism 4. The mounting platform 1... The top of the device is provided with two symmetrically distributed short side plates and two symmetrically distributed long side plates. Each short side plate is provided with a short side wall hot pressing mechanism 5, and each long side plate is provided with a long side wall hot pressing mechanism 2. The two long side wall hot pressing mechanisms 2 are located on the front and rear sides of the hot pressing lifting mechanism 4, respectively. The two short side wall hot pressing mechanisms 5 are located on the left and right sides of the hot pressing lifting mechanism 4, respectively. A stirring and conveying mechanism 6 is provided on the upper surface of the mounting platform 1. An electric push rod 11 is fixed at the bottom of the mounting platform 1. A push plate is fixed at the telescopic end of the electric push rod 11. An air pump and several jet nozzles are provided at the lower end of the mounting platform 1.

[0063] Rock wool particles and adhesives are mixed in a certain proportion by a stirring and conveying mechanism 6 to form a sound insulation filler fluid.

[0064] The outer panel assembly is placed with the waterproof membrane facing down as the positive orientation. The outer panel assemblies are placed alternately on the conveyor 48 with the positive and negative orientations. The first outer panel assembly is placed with the positive orientation and is transported to the designated position by the conveyor 48. The positively positioned outer panel assembly is first transported to the hot pressing lifting mechanism 4 by the loading and unloading mechanism 7. The two short side wall hot pressing mechanisms 5 and the two long side wall hot pressing mechanisms 2 abut against the four sides of the positively positioned outer panel assembly and form a molding cavity.

[0065] The sound insulation filler fluid is transported into the molding cavity by the stirring and conveying mechanism 6, and the sound insulation filler fluid is evenly spread by the material spreading mechanism 8, so that the sound insulation fluid is spread flat on the fiberboard 46 of the upright outer panel assembly.

[0066] The second, reverse-positioned outer panel assembly is transported to the top of the filler sound insulation layer 47 via the loading and unloading mechanism 7. The outer panel assembly is then pressed together by the top hot pressing mechanism 3 and the hot pressing lifting mechanism 4 to form a sound insulation multilayer plywood finished product.

[0067] The top hot pressing mechanism 3, the two short side wall hot pressing mechanisms 5, and the two long side wall hot pressing mechanisms 2 are reset. The finished plate is lowered to the designated position by the hot pressing lifting mechanism 4. The finished plate is pushed onto the finished product conveyor 10 by the electric push rod 11. The finished plate is output and collected by the finished product conveyor 10. The hot pressing lifting mechanism 4 is reset, and the production of the next plate continues. The finished plate and the finished product conveyor 10 can be cooled by the air pump and several air jets to improve safety.

[0068] The hot press lifting mechanism 4 includes a fixed frame, a hot press base 9, and several evenly distributed hydraulic rods 12. The telescopic ends of the hydraulic rods 12 are all fixedly connected to the bottom of the hot press base 9, and the fixed ends of the hydraulic rods 12 are all fixedly connected to the fixed frame. The electric push rod 11 is located on the left side of the fixed frame, and the finished product conveyor 10 is located on the right side of the fixed frame.

[0069] After the sound-insulating multi-layer plywood is hot-pressed, the hydraulic rod 12 is activated. The telescopic end of the hydraulic rod 12 retracts, causing the hot-press base 9 to descend until the upper surface of the hot-press base 9 is flush with the lower surface of the push plate. Then, the electric push rod 11 is activated. The telescopic end of the electric push rod 11 extends, causing the push plate to move. The push plate pushes the finished sound-insulating multi-layer plywood onto the finished product conveyor 10. The finished product conveyor 10 is then activated to output and collect the sound-insulating multi-layer plywood.

[0070] The short sidewall hot pressing mechanism 5 includes a mounting frame 23, which is fixed to the short side plate. A power supply box 28 is provided on the mounting frame 23. A control console 27 is provided on the side wall of the mounting frame 23. An electric push rod 25 is provided at the top center of the mounting frame 23. A limit seat 26 is fixed at the top side of the mounting frame 23. The electric push rod 25 is located in the middle of the limit seat 26. The telescopic end of the electric push rod 25 extends to the outside of the limit seat 26 and is fixed with a heat insulation plate. A hot pressing plate 24 is fixed on the heat insulation plate. The electric push rod 25 and the control console 27 are both electrically connected to the power supply box 28. The long sidewall hot pressing mechanism 2 has the same structure as the short sidewall hot pressing mechanism 5. The hot pressing plate 24 of the long sidewall hot pressing mechanism 2 is different in size from that of the short sidewall hot pressing mechanism 5.

[0071] The four electric push rods 25 are activated by the control console 27. The telescopic ends of the four electric push rods 25 extend and drive the corresponding heat insulation plate and hot press plate 24 to move until the four hot press plates 24 respectively abut against the outer wall of the outer panel assembly. The size of the four hot press plates 24 is adjusted and replaced according to the size of the sound insulation multilayer plywood.

[0072] The top hot pressing mechanism 3, the loading and unloading mechanism 7, and the feeding mechanism 8 all include a rotary lifting assembly. The rotary lifting assembly includes a fixed column 13, with a mounting base 14 fixed to the end of the fixed column 13. A turntable 16 is rotatably connected to the top of the mounting base 14. A power motor 17 is fixed to the side wall of the mounting base 14. The output shaft of the power motor 17 is connected to the turntable 16 via a gear set. A slide rail 18 is fixed to the top of the turntable 16. A rotary motor 15 is fixed to the side wall of the slide rail 18. A lead screw is rotatably connected inside the slide rail 18. The output shaft of the rotary motor 15 is connected to the lead screw via a coupling. A sliding seat 21 is slidably connected inside the slide rail 18. The sliding seat 21 is threadedly connected to the lead screw. A mounting plate 19 is fixed to the bottom of the sliding seat 21. Several hydraulic cylinders 22 are evenly distributed at equal intervals at the bottom of the mounting plate 19.

[0073] Start the power motor 17. The output shaft of the power motor 17 drives the turntable 16 to rotate through the gear set. The turntable 16 drives the slide rail 18 to rotate until it reaches the designated position. Start the rotary motor 15. The output shaft of the rotary motor 15 drives the lead screw to rotate through the coupling. The lead screw drives the sliding seat 21 to slide. The sliding seat 21 drives the mounting plate 19 to move until it moves to the designated horizontal position.

[0074] The top hot pressing mechanism 3 also includes a heat-insulating top plate and a hot pressing top plate. The heat-insulating top plate is fixedly connected to the telescopic end of the hydraulic cylinder 22 of the top hot pressing mechanism 3. The hot pressing top plate is fixed on the heat-insulating top plate. The loading and unloading mechanism 7 also includes several suction cups 20. The suction cups 20 are fixedly connected to the telescopic ends of the hydraulic cylinders 22 at corresponding positions of the loading and unloading mechanism 7. The material feeding mechanism 8 also includes a connecting seat 49. The connecting seat 49 is fixedly connected to the telescopic end of the hydraulic cylinder 22 of the material feeding mechanism 8. A material feeding rake 50 is fixed at the lower end of the connecting seat 49.

[0075] During loading and unloading, the hydraulic cylinder 22 of the loading and unloading mechanism 7 is activated. The telescopic end of the hydraulic cylinder 22 of the loading and unloading mechanism 7 drives the suction cup 20 to move. The suction cup 20, in conjunction with the air pump, picks up the plate and then moves the plate to the designated position through the rotary lifting assembly. During hot pressing, the hydraulic cylinder 22 of the top hot pressing mechanism 3 is activated. The telescopic end of the hydraulic cylinder 22 of the top hot pressing mechanism 3 drives the heat insulation top plate and the hot pressing top plate to move until the hot pressing top plate abuts against the outer plate assembly. During material removal, the hydraulic cylinder 22 of the material removal mechanism 8 is activated. The telescopic end of the hydraulic cylinder 22 of the material removal mechanism 8 drives the connecting seat 49 to move. The connecting seat 49 drives the material removal rake 50 to the designated height and then moves the material removal rake 50 laterally through the rotary lifting assembly to remove the material.

[0076] The mixing and conveying mechanism 6 includes a transmission frame 40 and a mixing frame 43, both of which are fixed to the upper surface of the mounting platform 1. A mixing motor 29 and a mixing tank 30 are fixed on the mixing frame 43. A discharge port is provided at the bottom of the mixing tank 30. A mixing paddle 31 is rotatably connected inside the mixing tank 30. The output shaft of the mixing motor 29 is connected to the mixing paddle 31 via a pulley assembly. A valve motor and two rotating seats 33 are fixed to the side wall of the mixing tank 30. A rotating shaft 34 is rotatably connected between the two rotating seats 33. A baffle 42 is fixed to the lower end of the rotating shaft 34. The upper end of the rotating shaft 34 is connected to the output shaft of the valve motor via a connecting bearing 32. 42 is abutting against the bottom of the mixing tank 30 and located directly below the discharge port. A baffle 35 is fixed on the side wall of one end of the transmission frame 40. A driven roller 41 is rotatably connected between the two side walls of this end. The baffle 35 is located directly below the baffle 42. Several evenly distributed transmission rollers 39 are fixed on the transmission frame 40. A transmission motor 37 is fixed on the top of the other end of the transmission frame 40. A drive roller 38 is rotatably connected between the two inner walls of this end. The output shaft of the transmission motor 37 is driven by the drive roller 38 through a pulley set. A concave transmission belt 36 is driven between the drive roller 38 and the driven roller 41. Several transmission rollers 39 abut against the bottom of the concave transmission belt 36.

[0077] A certain proportion of rock wool granules and adhesive is injected into the mixing tank 30. The mixing motor 29 is started, and the output shaft of the mixing motor 29 drives the mixing paddle 31 to rotate through the pulley set, mixing the rock wool granules and adhesive until the rock wool granules and adhesive form a sound insulation filler fluid. The valve motor is started, and the output shaft of the valve motor drives the rotating shaft 34 to rotate through the connecting bearing 32. The rotating shaft 34 drives the baffle 42 to rotate, so that the baffle 42 no longer blocks the discharge port. The sound insulation filler fluid flows from the discharge port onto the concave conveyor belt 36. The baffle hopper 35 can prevent the sound insulation filler fluid from spilling. The transmission motor 37 is started, and the output shaft of the transmission motor 37 drives the drive roller 38 to rotate through the pulley set. Through the cooperation of the drive roller 38, the transmission roller 39, the driven roller 41 and the concave conveyor belt 36, the sound insulation filler fluid is transported into the molding cavity.

[0078] In summary, by cooperating with the hot pressing lifting mechanism 4, the two short side wall hot pressing mechanisms 5, the two long side wall hot pressing mechanisms 2, and the top hot pressing mechanism 3, the six sides of the sound-insulating multi-layer plywood can be hot-pressed simultaneously, thereby improving the hot pressing forming quality of the sound-insulating multi-layer plywood.

[0079] The mixing and conveying mechanism 6 can complete the preparation and conveying of the sound insulation filler fluid. The material feeding mechanism 8 can agitate and scrape the poured sound insulation filler fluid evenly, accelerate the filling of the sound insulation filler fluid into the molding cavity, and improve the preparation efficiency.

[0080] By cooperating with the conveyor 48 and the loading / unloading mechanism 7, the automated conveying and loading of semi-finished products can be realized. By cooperating with the hot press lifting mechanism 4, the electric push rod 11, the push plate and the finished product conveyor 10, the automated unloading and output of finished products can be realized, reducing the labor intensity of workers and optimizing the working environment. Example

[0081] A certain proportion of rock wool particles and adhesive are injected into the mixing tank 30, and the stirring motor 29 is started. The output shaft of the stirring motor 29 drives the stirring paddle 31 to rotate through the belt pulley set, stirring and mixing the rock wool particles and adhesive to form a sound insulation filler fluid.

[0082] The outer panel assembly is placed with the waterproof membrane facing down as the forward orientation. The outer panel assemblies are then alternately placed on the conveyor 48 in both forward and reverse orientations. The first outer panel assembly is placed forward. The conveyor 48 transports the outer panel assembly to the designated position. The rotating lifting assembly of the loading / unloading mechanism 7 moves the suction cup 20 to the designated position, which activates the power motor 17. The output shaft of the power motor 17 drives the turntable 16 to rotate via a gear set. The turntable 16 drives the slide rail 18 to rotate until it is directly facing the conveyor 48. Then, the rotary motor 15 is activated. The output shaft of the rotary motor 15 drives the lead screw to rotate via a coupling. The lead screw drives the sliding seat 21 to slide, and the sliding seat 21 drives the mounting plate 19 to move until it is directly above the conveyor 48. Finally, the hydraulic cylinder 22 is activated. The telescopic end of the hydraulic cylinder 22 moves the suction cup 20 until it contacts the forward-positioned outer panel assembly. On the upper surface of the outer panel assembly, the suction cup 20, in conjunction with the air pump, is used to pick up and fix the panel. The power motor 17 is started, and the output shaft of the power motor 17 drives the turntable 16 to rotate through the gear set. The turntable 16 drives the slide rail 18 to rotate until it rotates to the direction facing the hot press base 9. The rotary motor 15 is started, and the output shaft of the rotary motor 15 drives the lead screw to rotate through the coupling. The lead screw drives the sliding seat 21 to slide, and the sliding seat 21 drives the mounting plate 19 to move until it moves directly above the hot press base 9. Then, the hydraulic cylinder 22 is started, and the telescopic end of the hydraulic cylinder 22 drives the suction cup 20 to move. The suction cup 20 moves the upright outer panel assembly to the upper surface of the hot press base 9. In conjunction with the air pump, the suction cup 20 stops picking up and fixing the panel, and the upright outer panel assembly is placed on the hot press base 9.

[0083] The four electric push rods 25 are activated simultaneously via the control console 27. The telescopic ends of the four electric push rods 25 extend and drive the corresponding heat insulation plates and hot pressing plates 24 to move until the four hot pressing plates 24 respectively abut against the outer walls of the outer panel assembly, clamping the outer panel assembly in the center. The four hot pressing plates 24 and the outer panel assembly form a molding cavity. The size of the four hot pressing plates 24 is adjusted and replaced according to the size of the sound insulation multilayer plywood.

[0084] When the valve motor is started, the output shaft of the valve motor drives the rotating shaft 34 to rotate through the connecting bearing 32. The rotating shaft 34 drives the baffle 42 to rotate, so that the baffle 42 no longer blocks the discharge port. The sound insulation filler fluid flows from the discharge port onto the concave conveyor belt 36. The baffle hopper 35 can prevent the sound insulation filler fluid from spilling. When the transmission motor 37 is started, the output shaft of the transmission motor 37 drives the drive roller 38 to rotate through the pulley set. Through the cooperation of the drive roller 38, the transmission roller 39, the driven roller 41 and the concave conveyor belt 36, the sound insulation filler fluid is transported into the molding cavity.

[0085] The rotating lifting assembly of the feeding mechanism 8 moves the connecting seat 49 and the feeding rake 50 to a designated position, thereby activating the power motor 17. The output shaft of the power motor 17 drives the turntable 16 to rotate via a gear set, and the turntable 16 drives the slide rail 18 to rotate until it rotates to face the hot pressing base 9. Then, the rotating motor 15 is activated, and the output shaft of the rotating motor 15 drives the lead screw to rotate via a coupling. The lead screw drives the sliding seat 21 to slide, and the sliding seat 21 drives the mounting plate 19 to move until it moves directly above the feeding end of the molding cavity. Then, the hydraulic cylinder 22 is activated, and the telescopic end of the hydraulic cylinder 22 drives the feeding rake 50 to move until the feeding rake 50 contacts the sound insulation filler fluid in the molding cavity. Finally, the rotating motor 15 is activated, and the rotating motor... The output shaft of machine 15 drives the lead screw to rotate through the coupling. The lead screw drives the sliding seat 21 to slide. The sliding seat 21 drives the mounting plate 19 to move. The mounting plate 19 drives the material rake 50 to move until the material rake 50 moves to the end of the forming cavity away from the feeding end. This process is repeated to drive the material rake 50 to feed material, so that the sound insulation fluid is spread evenly on the fiberboard 46 of the upright outer panel assembly. After the sound insulation filler fluid is fed and fed, the power motor 17 is started. The output shaft of the power motor 17 drives the turntable 16 to rotate through the gear set. The turntable 16 drives the slide rail 18 to rotate until it returns to its original direction. Then the hydraulic cylinder 22 is started. The extension end of the hydraulic cylinder 22 drives the material rake 50 to retract until the material rake 50 completes the reset.

[0086] The second, reverse-positioned outer panel assembly is similarly transported to the top of the filler sound insulation layer 47 via the loading and unloading mechanism 7. The rotating lifting assembly of the top hot pressing mechanism 3 drives the hot pressing top plate to hot press the outer panel assembly. That is, the power motor 17 is started, and the output shaft of the power motor 17 drives the turntable 16 to rotate through the gear set. The turntable 16 drives the slide rail 18 to rotate until it rotates to the direction facing the hot pressing base 9. Then, the rotating motor 15 is started, and the output shaft of the rotating motor 15 drives the lead screw to rotate through the coupling. The lead screw drives the sliding seat 21 to slide, and the sliding seat 21 drives the mounting plate 19 to move until it moves directly above the hot pressing base 9. Then, the hydraulic cylinder 22 is started, and the extension end of the hydraulic cylinder 22 drives the hot pressing top plate to press the reverse-positioned outer panel assembly until the two outer panel assemblies and the filler sound insulation layer 47 form a sound insulation multilayer plywood finished product.

[0087] To reset the top hot-pressing mechanism 3, the power motor 17 is started. The output shaft of the power motor 17 drives the turntable 16 to rotate via the gear set. The turntable 16 drives the slide rail 18 to rotate until it returns to its original direction. Then, the hydraulic cylinder 22 is started. The telescopic end of the hydraulic cylinder 22 drives the hot-pressing top plate to reset. To reset the two short sidewall hot-pressing mechanisms 5 and the two long sidewall hot-pressing mechanisms 2, the four electric push rods 25 are started. The telescopic ends of the four electric push rods 25 extend and drive the corresponding heat insulation plate and hot-pressing plate 24 to move, so that the four hot-pressing plates 24 no longer resist the outer panel assembly. The outer wall is moved until it is reset; the hydraulic rod 12 is activated, and the telescopic end of the hydraulic rod 12 retracts, causing the hot pressing base 9 to descend until the upper end surface of the hot pressing base 9 is flush with the lower end surface of the push plate. The finished plate is pushed onto the finished product conveyor 10 by the electric push rod 11, and the finished product is output and collected by the finished product conveyor 10; the hot pressing lifting mechanism 4 is reset, that is, the hydraulic rod 12 is activated, and the telescopic end of the hydraulic rod 12 extends, causing the hot pressing base 9 to rise until the upper end surface of the hot pressing base 9 is flush with the lower end surface of the hot pressing plate 24, completing the reset of the hot pressing base 9, and continuing the production of the next plate.

[0088] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A method for preparing a sound-insulating multilayer plywood, wherein the sound-insulating multilayer plywood is made by hot-pressing and gluing two symmetrically distributed outer panel components and a filler sound insulation layer (47) disposed between the two outer panel components, wherein the outer panel components are made by hot-pressing and gluing a waterproof board (44), a sound insulation board (45) and a fiberboard (46) arranged sequentially from the outside to the inside, wherein the waterproof board (44) is made of a high molecular polymer as the basic raw material, the sound insulation board (45) is made of glass wool material, the fiberboard (46) is made of wood fiber material, and the filler sound insulation layer (47) is made by hot-pressing a mixture of rock wool particles and adhesive in a certain proportion, characterized in that, Includes the following steps: Step 1, Semi-finished product preparation: Apply adhesive to both the top and bottom sides of the sound insulation board, and then glue the waterproof board and fiberboard to the top and bottom sides of the sound insulation board respectively. Glue and pre-press them, and cut them into the required size to obtain the outer panel assembly; mix the rock wool particles and adhesive in a certain proportion through a stirring and conveying mechanism to form a sound insulation filler fluid. Step 2, conveying and feeding of outer panel components: The outer panel components are placed with the waterproof board facing down as the positive orientation. The outer panel components are placed alternately on the conveyor with the positive and negative orientations. The first outer panel component is placed positively and is conveyed to the designated position by the conveyor. The positively placed outer panel components are transported to the hot pressing lifting mechanism by the loading and unloading mechanism. The two short side wall hot pressing mechanisms and the two long side wall hot pressing mechanisms abut against the four sides of the positively placed outer panel components and form a molding cavity. Step 3, filling and spreading of the sound insulation layer: The sound insulation filler fluid is transported into the molding cavity by the stirring and conveying mechanism, and the sound insulation filler fluid is spread evenly by the spreading mechanism so that the sound insulation fluid is spread evenly on the fiberboard of the upright outer panel assembly. Step 4, Pressing and Shaping: The second, reverse-positioned outer panel assembly is transported to the top of the filler sound insulation layer through the loading and unloading mechanism. The outer panel assembly is pressed together by the top hot pressing mechanism and the hot pressing lifting mechanism to form a sound insulation multi-layer plywood finished product. Step 5: Finished Product Conveying: Reset the top hot pressing mechanism, the two short side wall hot pressing mechanisms, and the two long side wall hot pressing mechanisms. Use the hot pressing lifting mechanism to lower the finished plate on the hot pressing base to the designated position. Use the electric push rod to push the finished plate onto the finished product conveyor. Use the finished product conveyor to output and collect the finished plate. Use the hot pressing lifting mechanism to reset the hot pressing base and continue making the next plate.

2. The method for preparing a sound-insulating multilayer plywood according to claim 1, characterized in that, It also includes a finished product hot pressing device, which includes an installation platform (1), a top hot pressing mechanism (3), a hot pressing lifting mechanism (4), a loading and unloading mechanism (7), a material feeding mechanism (8), a hot pressing base (9), a finished product conveyor (10), and a conveyor (48). The hot pressing lifting mechanism (4) is located in the middle of the installation platform (1), the top hot pressing mechanism (3) and the loading and unloading mechanism (7) are located on the front and rear sides of the installation platform (1), the material feeding mechanism (8) is located on the right side of the installation platform (1), the conveyor (48) is located to the lower right of the loading and unloading mechanism (7), and the finished product conveyor (10) is located to the lower right of the hot pressing lifting mechanism (4). The installation platform (1) The top of the mounting platform (1) is provided with two symmetrically distributed short side plates and two symmetrically distributed long side plates. Each short side plate is provided with a short side wall hot pressing mechanism (5), and each long side plate is provided with a long side wall hot pressing mechanism (2). The two long side wall hot pressing mechanisms (2) are located on the front and rear sides of the hot pressing lifting mechanism (4), respectively. The two short side wall hot pressing mechanisms (5) are located on the left and right sides of the hot pressing lifting mechanism (4), respectively. A stirring and conveying mechanism (6) is provided on the upper surface of the mounting platform (1). An electric push rod (11) is fixed at the bottom of the mounting platform (1). A push plate is fixed at the telescopic end of the electric push rod (11). An air pump and several jet nozzles are provided at the lower end of the mounting platform (1).

3. The method for preparing a sound-insulating multilayer plywood according to claim 2, characterized in that, The hot press lifting mechanism (4) includes a fixed frame, a hot press base (9) and several evenly distributed hydraulic rods (12). The telescopic ends of the hydraulic rods (12) are fixedly connected to the bottom of the hot press base (9), and the fixed ends of the hydraulic rods (12) are fixedly connected to the fixed frame. The electric push rod (11) is located on the left side of the fixed frame, and the finished product conveyor (10) is located on the right side of the fixed frame.

4. The method for preparing a sound-insulating multilayer plywood according to claim 2, characterized in that, The short sidewall hot pressing mechanism (5) includes a mounting frame (23), which is fixed on the short side plate. A power supply box (28) is provided on the mounting frame (23), and a control console (27) is provided on the side wall of the mounting frame (23). An electric push rod (25) is provided at the top center of the mounting frame (23). A limit seat (26) is fixed at the top side of the mounting frame (23). The electric push rod (25) is located in the middle of the limit seat (26). The telescopic end of the electric push rod (25) extends to the outside of the limit seat (26) and is fixed with a heat insulation plate. A hot pressing plate (24) is fixed on the heat insulation plate. The electric push rod (25) and the control console (27) are electrically connected to the power supply box (28). The long sidewall hot pressing mechanism (2) has the same structure as the short sidewall hot pressing mechanism (5). The hot pressing plate (24) of the long sidewall hot pressing mechanism (2) is different in size from the hot pressing plate (24) of the short sidewall hot pressing mechanism (5).

5. The method for preparing a sound-insulating multilayer plywood according to claim 2, characterized in that, The top hot pressing mechanism (3), loading and unloading mechanism (7) and feeding mechanism (8) all include a rotary lifting assembly. The rotary lifting assembly includes a fixed column (13). The end of the fixed column (13) is fixed with a mounting base (14). The top of the mounting base (14) is rotatably connected to a turntable (16). A power motor (17) is fixed on the side wall of the mounting base (14). The output shaft of the power motor (17) is connected to the turntable (16) through a gear set. A slide rail (18) is fixed on the top of the turntable (16). A rotary motor (15) is fixed on the side wall of the slide rail (18). A lead screw is rotatably connected inside the slide rail (18). The output shaft of the rotary motor (15) is connected to the lead screw through a coupling. A sliding seat (21) is slidably connected inside the slide rail (18). The sliding seat (21) is threadedly connected to the lead screw. A mounting plate (19) is fixed at the bottom of the sliding seat (21). Several hydraulic cylinders (22) are evenly distributed at equal intervals at the bottom of the mounting plate (19).

6. The method for preparing a sound-insulating multilayer plywood according to claim 5, characterized in that, The top hot pressing mechanism (3) also includes a heat insulation top plate and a hot pressing top plate. The heat insulation top plate is fixedly connected to the telescopic end of the hydraulic cylinder (22) of the top hot pressing mechanism (3). The hot pressing top plate is fixed on the heat insulation top plate. The loading and unloading mechanism (7) also includes several suction cups (20). The suction cups (20) are fixedly connected to the telescopic end of the hydraulic cylinder (22) at the corresponding position of the loading and unloading mechanism (7). The feeding mechanism (8) also includes a connecting seat (49). The connecting seat (49) is fixedly connected to the telescopic end of the hydraulic cylinder (22) of the feeding mechanism (8). The lower end of the connecting seat (49) is fixed with a feeding rake (50).

7. The method for preparing a sound-insulating multilayer plywood according to claim 2, characterized in that, The mixing and conveying mechanism (6) includes a transmission frame (40) and a mixing frame (43). Both the transmission frame (40) and the mixing frame (43) are fixed on the upper surface of the mounting platform (1). A mixing motor (29) and a mixing tank (30) are fixed on the mixing frame (43). A discharge port is opened at the bottom of the mixing tank (30). A mixing paddle (31) is rotatably connected inside the mixing tank (30). The output shaft of the mixing motor (29) is connected to the mixing paddle (31) through a pulley set. A valve motor and two rotating seats (33) are fixed on the side wall of the mixing tank (30). A rotating shaft (34) is rotatably connected between the two rotating seats (33). A baffle (42) is fixed at the lower end of the rotating shaft (34). The upper end of the rotating shaft (34) is connected to the output shaft of the valve motor through a connecting bearing (32). The baffle (42) abuts against... The bottom of the mixing tank (30) is touched and located directly below the discharge port. A baffle hopper (35) is fixed on the side wall of one end of the transmission frame (40). A driven roller (41) is rotatably connected between the two side walls of one end of the transmission frame (40). The baffle hopper (35) is located directly below the baffle (42). Several evenly distributed transmission rollers (39) are fixed on the transmission frame (40). A transmission motor (37) is fixed on the top of the other end of the transmission frame (40). An active roller (38) is rotatably connected between the two inner walls of the other end of the transmission frame (40). The output shaft of the transmission motor (37) is connected to the active roller (38) through a pulley set. A concave transmission belt (36) is connected between the active roller (38) and the driven roller (41). Several transmission rollers (39) are all in contact with the bottom of the concave transmission belt (36).

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