A method for preparing a high acoustic impedance high acoustic attenuation acoustic material

Abstract

The application discloses a preparation method of high acoustic impedance and high acoustic attenuation acoustic material, and relates to the field of acoustic material manufacturing. The preparation method of the high acoustic impedance and high acoustic attenuation acoustic material selects tungsten powder with a micron order of about 20 um wide particle size and accounting for 80% of the total volume of the backing and thermoplastic polyurethane resin accounting for 20% of the volume of the backing, carries out pretreatment of the material through a preparation device, and then puts the composite particles into a backing mold and carries out hot pressing forming through a hot press. The preparation method of the high acoustic impedance and high acoustic attenuation acoustic material can achieve a slow reflection and high absorption effect, the surface pretreatment of the tungsten powder particles can reduce the electrical conductivity of the material and improve the impedance, the tungsten powder and the resin are combined more closely and uniformly, and finally, the hot pressing forming ensures that the bonding force between the materials is strong, the normal temperature solidification and plastic removal further increase the density of the material, so that the material has good high acoustic attenuation and high acoustic impedance performance.

Description

Technical Field

[0001] This invention relates to the field of acoustic material manufacturing technology, specifically a method for preparing a high acoustic impedance and high acoustic attenuation acoustic material. Background Technology

[0002] Backing is an important part that affects the performance of ultrasonic probes. In ultrasonic probes, PZT piezoelectric crystals with excellent comprehensive performance are often used as the sound-generating structure. However, due to their high acoustic impedance, according to the principles of ultrasonics, in order to match the crystal with its high acoustic impedance and attenuate the sound wave energy emitted by the crystal in the back direction as much as possible, a backing material that has both high acoustic attenuation performance and matches the high acoustic impedance of the PZT crystal plays an important role in improving the performance of ultrasonic probes.

[0003] The preparation method of a high attenuation backing material disclosed in patent document CN201410696735.2 is as follows: 45% of the total volume of the backing material is tungsten powder of the micron scale (2-7 μm) and 55% of the total volume of the backing material is polyester powder with a glass transition temperature of 70-150℃. The powder is placed in a ball mill jar, and the ball mill jar is placed on a ball mill to grind and mix evenly. The evenly mixed powder is dried in an oven at 20-50℃ for 1.5 hours and then passed through a 500-mesh sieve. The evenly mixed powder is then placed in a container (4) to remove the air. A hot press (5) is connected to the container (4). The hot press (5) is heated to 70℃-150℃. The container (4) is pressurized to 5MPa-15MPa and hot-pressed for 5-20 minutes.

[0004] A method for producing a high-resistivity backing material disclosed in patent document CN201610462101.X involves adding thermoplastic polyurethane resin to a tetrahydrofuran organic solvent, placing it in a constant temperature chamber at 35-45℃ for more than 24 hours, and adding 5μm tungsten powder after the polyurethane has completely dissolved. After uniformly stirring and mixing, the colloidal solution is heated and stirred on a hot plate at 60-70℃. After the tetrahydrofuran evaporates, the particles are dried and sieved. The sieved particles are then held in a hot press at 110℃ and 2-4MPa pressure for 20 seconds, and finally cooled to obtain the backing material.

[0005] However, existing technologies still have the following drawbacks: 1. Currently, the tungsten powder particles used in backing are basically limited to small particle sizes of 2-7µm; 2. The higher the percentage of tungsten powder, the worse the material bonding force, and the lower the sound attenuation performance, making it unable to meet practical requirements; 3. Existing methods do not discuss the insulation treatment of tungsten powder in detail. The resistivity of the backing material containing tungsten powder is low, which can easily cause electrical imaging of the ultrasonic probe. 4. The preparation of such acoustic materials requires the use of various processing equipment, which is costly, cumbersome to operate, and results in significant material loss during transfer. Therefore, a method for preparing high acoustic impedance and high acoustic attenuation acoustic materials is provided to solve the above problems. Summary of the Invention

[0006] Technical problems to be solved To address the shortcomings of existing technologies, this invention discloses a method for preparing high acoustic impedance and high acoustic attenuation acoustic materials, thereby solving the problems mentioned in the background section.

[0007] Technical solution To achieve the above objectives, the present invention provides the following technical solution: a method for preparing a high acoustic impedance and high acoustic attenuation acoustic material, comprising the following operational steps; Step 1: Material selection; Select tungsten powder with a wide particle size of about 20 μm on the micron scale, accounting for 80% of the total volume of the backing, and thermoplastic polyurethane resin accounting for 20% of the backing volume. Step 2: Material pretreatment using preparation equipment; crush the thermoplastic polyurethane resin obtained in Step 1 into nano-sized particles; dry tungsten powder and ceramic powder and mix them in a ratio of tungsten powder: ceramic powder: glue = 1: 0.1~0.25: 0.04~0.08, then press them into blocks, crush them, sieve them, dry them and set them aside for later use; Step 3: Mix the materials using the preparation equipment; stir all the materials processed in Step 2 evenly, dry the evenly stirred powder in an environment of 45°C for more than 3 hours, and then sieve it; Step 4: Hot pressing of materials; Take the composite particles obtained in step 3 and put them into the backing mold, place them on the hot press, keep the temperature at 150℃ and the pressure at about 5MPa, hot press for 3 minutes, stop heating, and after the mold cools to room temperature, solidify at room temperature, remove the plastic and demold to obtain the required backing material.

[0008] Preferably, the preparation equipment includes an equipment base and a dry material processing cylinder and a wet material processing cylinder installed on the top of the equipment base. An electric heating chamber is installed inside the equipment base. A connecting seat is installed between the dry material processing cylinder and the wet material processing cylinder. A lifting column is provided in the middle of the connecting seat. The connecting seat can rotate around the lifting column. The dry material processing cylinder and the wet material processing cylinder can be flipped and moved up and down on the outer surface of the connecting seat. A rotating processing frame is provided on the top of the lifting column. A stirring roller, a crushing roller, a pressing and crushing integrated roller, and a lifting clamp are respectively installed at the four ends of the rotating processing frame. A detachable screen bucket is installed at the bottom of the lifting clamp.

[0009] Preferably, a hollow support column is fixedly installed on the top of the equipment base, an electric rotating seat is installed on the outer surface of the bottom end of the hollow support column, the connecting seat is fixedly installed on the top of the electric rotating seat, a lifting hydraulic cylinder is installed inside the lifting column, and the output end of the lifting hydraulic cylinder is fixedly connected to the inner bottom of the hollow support column.

[0010] Preferably, both sides of the connecting seat are provided with sliding grooves, the outer surface of the sliding groove is slidably connected to a sliding seat, the inside of the sliding groove is rotatably connected to a drive stud, the top of the connecting seat is fixedly installed with a lifting motor, the output end of the lifting motor is fixedly connected to the drive stud, and the drive stud is threadedly connected to the sliding seat.

[0011] Preferably, a tilting motor is fixedly installed in the middle of the side of the sliding seat, and connecting blocks are fixedly connected to the sides of both the dry material processing cylinder and the wet material processing cylinder. The output end of the tilting motor is fixedly connected to the connecting block, and positioning hydraulic rods are provided on both the upper and lower sides of the tilting motor. The output end of the positioning hydraulic rod is movably inserted into the inside of the connecting block.

[0012] Preferably, the outer surface of the detachable screen bucket is threaded with a fixing screw, the interior of the detachable screen bucket is provided with a screen frame, the sides of the screen frame and the wet material processing cylinder are provided with locking holes, and the end of the fixing screw is movably inserted into the inside of the locking hole, and the screen frame is movably inserted into the inner top of the wet material processing cylinder.

[0013] Preferably, the top of the detachable screen bucket is fixedly connected to a lifting bracket, and the lifting clamp is movably engaged inside the lifting bracket. The upper surfaces of the four ends of the rotating processing frame are respectively fixedly installed with a first drive motor, a second drive motor, a first electric hydraulic cylinder, and a second electric hydraulic cylinder. The lifting clamp is fixedly connected to the bottom of the output end of the first electric hydraulic cylinder. The stirring roller is installed at the bottom of the first drive motor, the crushing roller is installed at the bottom of the second drive motor, and the integrated pressing and crushing roller is installed at the bottom of the second electric hydraulic cylinder.

[0014] Preferably, the rotating processing frame has a toothed groove in the middle, and annular anti-detachment grooves are provided on both the upper and lower sides of the toothed groove. A connecting plate is fixedly installed on the top of the lifting column. Two sets of anti-detachment rings are fixedly welded to the outer surface of the connecting plate. The anti-detachment rings are rotatably connected to the inside of the annular anti-detachment grooves. A rotatable drive gear is provided on one side between the two sets of anti-detachment rings. An adjusting servo motor for controlling the rotation of the drive gear is installed on the top of the connecting plate. The drive gear meshes with the toothed groove.

[0015] Preferably, the integrated crushing roller includes a connecting shaft fixed to the bottom end of the second electric hydraulic cylinder, a perforated disc fixedly connected to the bottom end of the connecting shaft, an adjusting hydraulic cylinder installed inside the connecting shaft, a movable disc fixedly connected to the output end of the adjusting hydraulic cylinder, the movable disc slidably connected to the outer surface of the connecting shaft, a crushing roller fixedly connected to the bottom of the movable disc, and the crushing roller passing through the perforated disc.

[0016] This invention discloses a method for preparing a high acoustic impedance and high acoustic attenuation acoustic material, which has the following beneficial effects: The preparation method of this high acoustic impedance and high acoustic attenuation acoustic material involves a wide range of particle sizes, using powders with a particle size of about 20 μm in the micrometer range to achieve a slow reflection and high absorption effect. Surface pretreatment of tungsten powder particles can reduce the material's conductivity and increase impedance. The tungsten powder and resin are more tightly and uniformly bonded. Finally, hot pressing ensures strong bonding between the materials, and room temperature curing further increases the material's density, giving the material excellent high acoustic attenuation and high acoustic impedance performance.

[0017] The preparation method of this high acoustic impedance and high acoustic attenuation acoustic material involves designing a dedicated combined preparation device during the material pretreatment stage. This device can continuously process the composite particles used for pressing backing before pressing, realizing the crushing, mixing, pressing, breaking, sieving and drying of various materials. This facilitates the systematic and rapid processing of various materials, reducing the equipment cost of individual processing on the one hand, and reducing the material transfer process on the other hand, thus reducing the loss caused by material transfer. Attached Figure Description

[0018] Figure 1 This is a flowchart of the preparation method of the present invention; Figure 2 This is a schematic diagram of the outer surface structure of the equipment used in this invention; Figure 3 This is a schematic diagram of the back structure of the equipment used in this invention; Figure 4 This is a schematic diagram of the bottom structure of the rotating processing rack of the present invention; Figure 5 This is an exploded view of the outer surface structure of the rotating processing frame of the present invention; Figure 6 This is a schematic diagram of the outer surface structure of the lifting column of the present invention; Figure 7 This is an exploded view of the outer surface structure of the wet material processing cylinder of the present invention; Figure 8 This is an exploded view of the outer surface structure of the connector of the present invention.

[0019] In the diagram: 1. Equipment base; 2. Lifting column; 3. Connecting seat; 4. Dry material processing cylinder; 5. Wet material processing cylinder; 6. Rotating processing frame; 7. Mixing roller; 8. Crushing roller; 9. Pressing and crushing integrated roller; 91. Connecting shaft; 92. Perforated disc; 93. Adjusting hydraulic cylinder; 94. Movable disc; 95. Crushing roller; 10. Lifting clamp; 11. Toothed groove; 12. Annular anti-detachment groove; 13. First drive motor; 14. Second drive motor; 15. First electric hydraulic cylinder; 16. 17. Second electric hydraulic cylinder; 18. Slide groove; 19. Connecting plate; 20. Adjustment servo motor; 21. Drive gear; 22. Anti-detachment ring; 23. Lifting bracket; 24. Screen frame; 25. Connecting block; 26. Fixing screw; 27. Hollow support column; 28. Lifting hydraulic cylinder; 29. ​​Lifting motor; 30. Drive stud; 31. Sliding seat; 32. Tilting motor; 33. Positioning hydraulic rod; 34. Detachable screen bucket; 35. Electric heating chamber; 36. Electric rotating seat. Detailed Implementation

[0020] This invention discloses a method for preparing a high acoustic impedance and high acoustic attenuation acoustic material, such as... Figure 1-8 As shown, in order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings and through embodiments.

[0021] Example 1 like Figure 1-8 A method for preparing a high acoustic impedance and high acoustic attenuation acoustic material is shown, comprising the following steps; Step 1: Material selection; Select tungsten powder with a wide particle size of about 20 μm on the micron scale, accounting for 80% of the total volume of the backing, and thermoplastic polyurethane resin accounting for 20% of the backing volume. Step 2: Material pretreatment using preparation equipment; crush the thermoplastic polyurethane resin obtained in Step 1 into nano-sized particles; dry tungsten powder and ceramic powder and mix them in a ratio of tungsten powder: ceramic powder: glue = 1: 0.1~0.25: 0.04~0.08, then press them into blocks, crush them, sieve them, dry them and set them aside for later use; Step 3: Mix the materials using the preparation equipment; stir all the materials processed in Step 2 evenly, dry the evenly stirred powder in an environment of 45°C for more than 3 hours, and then sieve it; Step 4: Hot pressing of materials; Take the composite particles obtained in step 3 and put them into the backing mold, place them on the hot press, keep the temperature at 150℃ and the pressure at about 5MPa, hot press for 3 minutes, stop heating, and after the mold cools to room temperature, solidify at room temperature, remove the plastic and demold to obtain the required backing material.

[0022] The preparation equipment includes a base 1 and a dry material processing cylinder 4 and a wet material processing cylinder 5 installed on the top of the base 1. An electric heating chamber 34 is installed inside the base 1. A connecting seat 3 is installed between the dry material processing cylinders 4 and 5. A lifting column 2 is set in the middle of the connecting seat 3. The connecting seat 3 can rotate 360 ​​degrees around the lifting column 2. The dry material processing cylinder 4 and the wet material processing cylinder 5 can be flipped and moved up and down on the outer surface of the connecting seat 3. A rotating processing frame 6 is set on the top of the lifting column 2. A stirring roller 7, a crushing roller 8, a pressing and crushing integrated roller 9 and a lifting clamp 10 are respectively installed at the four ends of the rotating processing frame 6. A detachable screen bucket 33 is installed at the bottom of the lifting clamp 10.

[0023] A hollow support column 26 is fixedly installed on the top of the equipment base 1. An electric rotating seat 35 is installed on the outer surface of the bottom end of the hollow support column 26. A connecting seat 3 is fixedly installed on the top of the electric rotating seat 35. A lifting hydraulic cylinder 27 is installed inside the lifting column 2. The output end of the lifting hydraulic cylinder 27 is fixedly connected to the inner bottom of the hollow support column 26.

[0024] Both sides of the connecting seat 3 are provided with sliding grooves 17. The outer surface of the sliding groove 17 is slidably connected to the sliding seat 30. The inside of the sliding groove 17 is rotatably connected to the drive stud 29. The top of the connecting seat 3 is fixedly installed with a lifting motor 28. The output end of the lifting motor 28 is fixedly connected to the drive stud 29. The drive stud 29 is threadedly connected to the sliding seat 30.

[0025] A tilting motor 31 is fixedly installed on the middle of the side of the sliding seat 30. A connecting block 24 is fixedly connected to the side of both the dry material processing cylinder 4 and the wet material processing cylinder 5. The output end of the tilting motor 31 is fixedly connected to the connecting block 24. Positioning hydraulic rods 32 are provided on both the upper and lower sides of the tilting motor 31. The output end of the positioning hydraulic rod 32 is movably inserted into the inside of the connecting block 24.

[0026] The outer surface of the detachable screen bucket 33 is threaded with a fixing screw 25. The interior of the detachable screen bucket 33 is provided with a screen frame 23. The screen frame 23 and the wet material processing cylinder 5 are both provided with locking holes. The end of the fixing screw 25 is movably inserted into the locking hole. The screen frame 23 is movably inserted into the top of the wet material processing cylinder 5.

[0027] The top of the detachable screen hopper 33 is fixedly connected to a lifting bracket 22, and the lifting clamp 10 is movably engaged inside the lifting bracket 22. The upper surfaces of the four ends of the rotating processing frame 6 are respectively fixedly installed with a first drive motor 13, a second drive motor 14, a first electric hydraulic cylinder 15, and a second electric hydraulic cylinder 16. The lifting clamp 10 is fixedly connected to the bottom of the output end of the first electric hydraulic cylinder 15. The stirring roller 7 is installed at the bottom of the first drive motor 13, the crushing roller 8 is installed at the bottom of the second drive motor 14, and the pressing and crushing integrated roller 9 is installed at the bottom of the second electric hydraulic cylinder 16.

[0028] The rotating processing frame 6 has a toothed groove 11 in the middle, and annular anti-detachment grooves 12 are provided on both the upper and lower sides of the toothed groove 11. A connecting plate 18 is fixedly installed on the top of the lifting column 2. Two sets of anti-detachment rings 21 are fixedly welded on the outer surface of the connecting plate 18. The anti-detachment rings 21 are rotatably connected to the inside of the annular anti-detachment grooves 12. A rotatable drive gear 20 is provided on one side between the two sets of anti-detachment rings 21. An adjusting servo motor 19 for controlling the rotation of the drive gear 20 is installed on the top of the connecting plate 18. The drive gear 20 meshes with the toothed groove 11.

[0029] The integrated crushing roller 9 includes a connecting shaft 91 fixed to the bottom of the second electric hydraulic cylinder 16. A perforated disc 92 is fixedly connected to the bottom of the connecting shaft 91. An adjusting hydraulic cylinder 93 is installed inside the connecting shaft 91. A movable disc 94 is fixedly connected to the output end of the adjusting hydraulic cylinder 93. The movable disc 94 is slidably connected to the outer surface of the connecting shaft 91. A crushing roller 95 is fixedly connected to the bottom of the movable disc 94. The crushing roller 95 passes through the perforated disc 92.

[0030] Working principle: The preparation method of this high acoustic impedance and high acoustic attenuation acoustic material requires the use of special preparation equipment to operate in steps two and three of the preparation process during the raw material processing. In the pretreatment stage, thermoplastic polyurethane resin is placed inside the dry material processing cylinder 4. Then, by starting the regulating servo motor 19, the regulating servo motor 19 drives the drive gear 20 to rotate, thereby causing the entire rotating processing frame 6 to rotate. Finally, the crushing roller 8 moves into the dry material processing cylinder 4. Then, the lifting hydraulic cylinder 27 is controlled to retract, so that the crushing roller 8 moves downward into the dry material processing cylinder 4. At this time, by starting the first drive motor 13, the thermoplastic polyurethane resin is crushed by the crushing roller 8, breaking the thermoplastic polyurethane resin into nano-sized particles. Then, tungsten powder and ceramic powder are added to the wet material processing cylinder 5 at a ratio of 1:0.1~0.25. The entire connecting seat 3 is then rotated by the electric rotating base 35, causing the wet material processing cylinder 5 to move to the top of the electric heating chamber 34. The lifting motor 28 is then activated, causing the wet material processing cylinder 5 to move downwards into the electric heating chamber 34 for drying. After drying, glue is added to the wet material processing cylinder 5 at a ratio of tungsten powder:ceramic powder:glue = 1:0.1~0.25:0.04~0.08. The adjusting servo motor 19 is then activated, causing the stirring roller 7 to move to the top of the wet material processing cylinder 5. The lifting motor 28 then moves the stirring roller 7 further... The material is stirred and mixed inside the wet material processing cylinder 5. After mixing, the pressing and crushing integrated roller 9 is moved into the wet material processing cylinder 5, and then the second electric hydraulic cylinder 16 is activated so that the perforated disc 92 presses the material. During this process, the bottom end of the crushing roller 95 is flush with the bottom of the perforated disc 92. After waiting for a period of time, the material solidifies under the action of glue. Then, the adjusting hydraulic cylinder 93 is activated so that the output end of the adjusting hydraulic cylinder 93 drives the movable disc 94 to move downward, so that the bottom end of the crushing roller 95 extends downward. At this time, the output end of the second electric hydraulic cylinder 16 is controlled to repeatedly extend and retract, so as to crush the material through the crushing roller 95. Then, the detachable screen bucket 33 is held by the lifting clamp 10 and moved to the top of the wet material processing cylinder 5. Then, it is lowered by the first electric hydraulic cylinder 15, so that the detachable screen bucket 33 and the screen frame 23 fall to the top of the wet material processing cylinder 5 simultaneously. Then, it is fixed by the fixing screw 25. At this time, the positioning hydraulic rod 32 on the side of the wet material processing cylinder 5 is controlled to retract, and then the flipping motor 31 drives the wet material processing cylinder 5 to flip 180 degrees. At this time, the crushed material inside the wet material processing cylinder 5 is screened out, so that the fine material enters the detachable screen bucket 33. Then, the detachable screen bucket 33 is removed, and the incompletely crushed material is crushed again by the crushing roller 95 and the perforated disc 92. Then, it is screened again, and finally the material is processed to a qualified particle size. Then, it is poured back into the interior of the wet material processing cylinder 5 and dried again by the electric heating chamber 34. After completing the above operations, pour all the processed material into the dry material processing cylinder 4, and then stir it evenly with the stirring roller 7. After stirring, place the dry material processing cylinder 4 into the electric heating chamber 34 for drying. It should be noted that the temperature needs to be maintained at 45℃ during this drying process, and the drying time needs to be more than 3 hours. Then, the detachable screen bucket 33 and screen frame 23 are installed on the top of the dry material processing cylinder 4 for screening. Select the final qualified composite particles and put them into the backing mold. Place them on the hot press, maintain the temperature at 150℃ and the pressure at about 5MPa, and hot press for 3 minutes. Stop heating and wait for the mold to cool to room temperature. After solidification at room temperature, demold to obtain the required backing material.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A device for preparing high acoustic impedance and high acoustic attenuation acoustic materials, characterized in that, The equipment includes a base (1) and a dry material processing cylinder (4) and a wet material processing cylinder (5) installed on the top of the base (1). A set of electric heating chambers (34) are installed inside the base (1). A set of connecting seats (3) is installed between the dry material processing cylinder (4) and the wet material processing cylinder (5). A lifting column (2) is provided in the middle of the connecting seat (3). The connecting seat (3) can rotate 360 ​​degrees around the lifting column (2). The dry material processing cylinder (4) and the wet material processing cylinder (5) can be flipped and moved up and down on the outer surface of the connecting seat (3). A rotating processing frame (6) is provided on the top of the lifting column (2). A stirring roller (7), a crushing roller (8), a pressing and crushing integrated roller (9) and a lifting clamp (10) are respectively installed at the four ends of the rotating processing frame (6). A detachable screen bucket (33) is installed at the bottom of the lifting clamp (10). A hollow support column (26) is fixedly installed on the top of the equipment base (1). An electric rotating seat (35) is installed on the outer surface of the bottom end of the hollow support column (26). The connecting seat (3) is fixedly installed on the top of the electric rotating seat (35). A lifting hydraulic cylinder (27) is installed inside the lifting column (2). The output end of the lifting hydraulic cylinder (27) is fixedly connected to the inner bottom of the hollow support column (26). The integrated crushing roller (9) includes a connecting shaft (91) fixed to the bottom of the second electric hydraulic cylinder (16). A perforated disc (92) is fixedly connected to the bottom of the connecting shaft (91). An adjusting hydraulic cylinder (93) is installed inside the connecting shaft (91). A movable disc (94) is fixedly connected to the output end of the adjusting hydraulic cylinder (93). The movable disc (94) is slidably connected to the outer surface of the connecting shaft (91). A crushing roller (95) is fixedly connected to the bottom of the movable disc (94). The crushing roller (95) passes through the perforated disc (92).

2. The apparatus for preparing high acoustic impedance and high acoustic attenuation acoustic materials according to claim 1, characterized in that: The connecting seat (3) has sliding grooves (17) on both sides. A sliding seat (30) is slidably connected to the outer surface of the sliding groove (17). A drive stud (29) is rotatably connected inside the sliding groove (17). A lifting motor (28) is fixedly installed on the top of the connecting seat (3). The output end of the lifting motor (28) is fixedly connected to the drive stud (29). The drive stud (29) is threadedly connected to the sliding seat (30).

3. The apparatus for preparing a high acoustic impedance and high acoustic attenuation acoustic material according to claim 2, characterized in that: A flip motor (31) is fixedly installed in the middle of the side of the sliding seat (30). A connecting block (24) is fixedly connected to the side of both the dry material processing cylinder (4) and the wet material processing cylinder (5). The output end of the flip motor (31) is fixedly connected to the connecting block (24). Positioning hydraulic rods (32) are provided on both the upper and lower sides of the flip motor (31). The output end of the positioning hydraulic rod (32) is movably inserted into the inside of the connecting block (24).

4. The apparatus for preparing high acoustic impedance and high acoustic attenuation acoustic materials according to claim 3, characterized in that: The outer surface of the detachable sieve bucket (33) is threaded with a fixing screw (25). The detachable sieve bucket (33) is equipped with a screen frame (23). The screen frame (23) and the wet material processing cylinder (5) are both provided with locking holes on their sides. The end of the fixing screw (25) is movably inserted into the locking hole. The screen frame (23) is movably inserted into the inner top of the wet material processing cylinder (5).

5. The apparatus for preparing a high acoustic impedance and high acoustic attenuation acoustic material according to claim 4, characterized in that: The top of the detachable screen bucket (33) is fixedly connected to a lifting seat (22), and the lifting clamp (10) is movably clamped inside the lifting seat (22). The upper surfaces of the four ends of the rotating processing frame (6) are respectively fixedly installed with a first drive motor (13), a second drive motor (14), a first electric hydraulic cylinder (15), and a second electric hydraulic cylinder (16). The lifting clamp (10) is fixedly connected to the bottom of the output end of the first electric hydraulic cylinder (15). The stirring roller (7) is installed at the bottom of the first drive motor (13), the crushing roller (8) is installed at the bottom of the second drive motor (14), and the pressing and crushing integrated roller (9) is installed at the bottom of the second electric hydraulic cylinder (16).

6. The apparatus for preparing a high acoustic impedance and high acoustic attenuation acoustic material according to claim 5, characterized in that: The rotating processing frame (6) has a toothed groove (11) in the middle. Both the upper and lower sides of the toothed groove (11) have annular anti-detachment grooves (12). The top of the lifting column (2) is fixedly installed with a connecting plate (18). Two sets of anti-detachment rings (21) are fixedly welded to the outer surface of the connecting plate (18). The anti-detachment rings (21) are rotatably connected to the inside of the annular anti-detachment grooves (12). A rotatable drive gear (20) is provided on one side between the two sets of anti-detachment rings (21). The top of the connecting plate (18) is equipped with an adjustment servo motor (19) for controlling the rotation of the drive gear (20). The drive gear (20) meshes with the toothed groove (11).

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