Mixing device for processing anti-tear sound insulation rubber cushion block

Abstract

The invention belongs to the technical field of mixing devices, and particularly relates to a mixing device for processing a tear-resistant sound-insulation rubber cushion block, which comprises a mixing tank, a PLC (programmable logic controller), a tank cover arranged at the top of the mixing tank, a stirring assembly, a synchronous pressurizing assembly, a feedback triggering assembly and an extension scraping assembly, the stirring assembly is rotationally arranged on the tank cover and extends into the mixing tank. The stirring speed is increased in time after the medicament is added to quickly break through interface resistance to realize uniform dispersion and stable combination of the medicament, meanwhile, materials adhered to the inner wall of the mixing tank are scraped by interval gradually-increased pressure, and in cooperation with the detachable design of the tank cover and the mixing tank, the risk of rubber material degradation caused by long-term high shear is avoided, and the service life of the mixing tank is prolonged. The problems of non-uniform material mixing, waste and excessive abrasion between a scraping part and the tank wall are solved, and raw material addition and equipment cleaning and maintenance can be conveniently completed.

Description

Technical Field

[0001] This invention belongs to the technical field of mixing equipment, and in particular relates to a mixing equipment for processing tear-resistant and sound-insulating rubber pads. Background Technology

[0002] When using a mixing tank for rubber material mixing, the rubber substrate itself has high viscosity and strong adhesion. Furthermore, the material is affected by temperature, pressure, and shear force during mixing, causing some material to easily adhere to the inner wall and corners of the mixing tank. This adhesion problem leads to a series of adverse consequences: Firstly, the adhered material cannot participate in subsequent uniform mixing, resulting in uneven distribution of the overall rubber composition and insufficient mixing, directly affecting the molding quality of the rubber pads and causing excessive fluctuations in key performance indicators such as tensile strength and compression set. Secondly, the adhered material creates residual losses, reducing raw material utilization and increasing production costs. Moreover, cleaning the tank walls after mixing requires significant time and manpower, severely impacting production efficiency. Existing technologies have proposed some solutions to this material adhesion problem, such as the mixing device for rubber pad production proposed in patent publication number CN217834270U. This device uses a cleaning block to prevent raw materials from adhering to the inner wall of the main body during mixing and to scrape the inner wall of the main body after mixing. However, the following drawbacks still exist:

[0003] 1. The cleaning block is always in contact with the inner wall of the mixing tank. During the mechanical movement throughout the mixing process, the cleaning block will experience severe wear. The waste generated by the wear is very easy to mix into the rubber material, resulting in excessive impurities in the rubber material, which in turn affects the molding quality of the rubber pad and causes problems such as surface defects and decreased mechanical properties of the product.

[0004] 2. The continuous contact between the cleaning block and the tank wall will cause long-term wear on the inner wall of the mixing tank. Especially for mixing tanks with wear-resistant and anti-corrosion coatings on the inner wall, continuous friction will easily cause the coating to fall off, which will not only damage the protective performance of the tank wall and shorten the service life of the mixing tank, but the fallen coating debris will also further contaminate the rubber compound.

[0005] 3. The cleaning block is always under high pressure scraping against the inner wall of the mixing tank, which will increase the operating resistance of the equipment and increase energy consumption. At the same time, it may interfere with the normal mixing flow field of the material in the tank, affect the uniformity of shearing and stirring, and exacerbate the problem of insufficient mixing of local materials. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing a mixing apparatus for processing tear-resistant and sound-insulating rubber pads.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a mixing device for processing tear-resistant and sound-insulating rubber pads, comprising a mixing tank, a PLC controller, and a tank cover installed on the top of the mixing tank. A feeding pipe is fixedly installed on one side of the top of the tank cover. The device also includes: a stirring assembly, a synchronous pressurizing assembly, a feedback triggering assembly, and an extended scraping assembly. The stirring assembly is rotatably mounted on the tank cover and extends into the mixing tank. The synchronous pressurizing assembly is fixedly mounted on the tank cover and the stirring assembly, and performs pressurization and air supply operations in conjunction with the operation of the stirring assembly. The feedback triggering assembly is connected to the synchronous pressurizing assembly and determines the degree of stirring based on the amount of air supplied by the synchronous pressurizing assembly. The extended scraping assembly is movably mounted at the end of the stirring assembly to scrape off the material adhering to the inner wall of the mixing tank.

[0008] In the above-mentioned mixing device for processing tear-resistant and sound-insulating rubber pads, the stirring assembly includes a rotating tube rotatably sleeved at the center of the tank cover, and a motor rotating assembly for driving the rotating tube to rotate is fixedly installed at the upper end of the tank cover. The tube wall of the rotating tube is symmetrically and fixedly connected to multiple stirring tubes.

[0009] In the above-mentioned mixing device for processing tear-resistant and sound-insulating rubber pads, the synchronous pressurization component includes a support plate fixedly installed on the top of the tank cover. Multiple guide rods are symmetrically fixedly connected to the side wall of the support plate. The same force-bearing plate is slidably sleeved on the outside of the multiple guide rods. Multiple springs sleeved on the outside of the guide rods are fixedly connected between the force-bearing plate and the support plate. A compressed air bladder is fixedly connected between the support plate and the force-bearing plate. A cam located on one side of the force-bearing plate is fixedly sleeved on the wall of the rotating tube. An air supply pipe and an air replenishment pipe communicating with the compressed air bladder are fixedly installed on the side wall of the support plate. A one-way valve is installed on both the air supply pipe and the air replenishment pipe. The air supply pipe is connected to a feedback triggering component.

[0010] In the above-mentioned mixing device for processing tear-resistant and sound-insulating rubber pads, the feedback triggering component includes a feedback shell, a movable piston is sealed inside the feedback shell, multiple limiting slide rods are fixedly connected to the rear side of the movable piston, the end of the limiting slide rod away from the movable piston passes through the outside of the feedback shell, multiple springs sleeved on the limiting slide rods are fixedly connected between the feedback shell and the movable piston, a trigger switch is fixedly installed on the rear side of the inner wall of the feedback shell and is arranged opposite to the movable piston, and a pressure pipe is also fixedly connected to the upper side wall of the feedback shell, the end of the pressure pipe away from the feedback shell is rotatably connected to the upper end of the rotating pipe through a rotary sealing joint, and an electric control valve, a pressure relief valve and a pressure sensor are sequentially installed on the pressure pipe.

[0011] In the above-mentioned mixing device for processing tear-resistant and sound-insulating rubber pads, the extended scraping assembly includes multiple extended rods that are sealed and inserted into the end of the stirring tube away from the rotating tube. A pressure piston is fixedly connected to one end of the extended rod inside the stirring tube. A spring three sleeved outside the extended rod is fixedly connected to the pressure piston and the inner wall of the end of the stirring tube. The same scraper plate is fixedly connected to the ends of the multiple extended rods on the same side away from the stirring tube.

[0012] In the above-mentioned mixing device for processing tear-resistant and sound-insulating rubber pads, the end of the scraper away from the extension rod is set as an arc surface structure, and the surface of the scraper is uniformly provided with multiple material passage holes.

[0013] In the above-mentioned mixing device for processing tear-resistant and sound-insulating rubber pads, an electric push rod is fixedly inserted on the rear side of the feedback shell. The moving end of the electric push rod located inside the feedback shell is fixedly connected to an extrusion plate, and the extrusion plate is arranged opposite to the moving piston.

[0014] In the above-mentioned mixing device for processing tear-resistant and sound-insulating rubber pads, a sealing ring is fixedly installed on the top of the mixing tank and placed between the mixing tank and the tank cover, so that the mixing tank and the tank cover are sealed together. The outer surfaces of the rotating tube, stirring tube, extension rod and scraper are all coated with a layer of polytetrafluoroethylene coating.

[0015] In the above-mentioned mixing device for processing tear-resistant and sound-insulating rubber pads, two bases are symmetrically arranged on both sides of the mixing tank. Two hydraulic push rods are symmetrically fixedly installed on the upper end of the bases. The top moving ends of the two hydraulic push rods are fixedly connected to the same lifting plate, which is fixedly connected to one side of the tank cover.

[0016] Compared with existing technologies, the advantages of this invention are as follows:

[0017] 1. Through the set mixing tank, tank cover, feeding pipe, stirring component, synchronous pressurization component, and feedback triggering component, the stirring degree can be automatically monitored and the automatic addition of the agent can be controlled. After the agent is added, the stirring speed can be increased in time to quickly overcome the interfacial resistance between the agent and the rubber substrate, so as to achieve uniform dispersion and stable bonding of the agent, while avoiding the risk of rubber deterioration caused by long-term high shear.

[0018] 2. The extended scraping component can be used to scrape off the material adhering to the inner wall of the mixing tank at intervals, avoiding the problem of uneven mixing and material waste caused by material adhesion. It also avoids the problem of excessive wear on the scraper and mixing tank caused by prolonged scraping. The scraping and cleaning work can be better carried out by gradually increasing the scraping pressure.

[0019] 3. The base, hydraulic push rod, and lifting plate enable detachable assembly between the tank lid and the mixing tank, facilitating the addition of raw materials and the cleaning and maintenance of the mixing tank's interior. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural schematic diagram of the stirring assembly of the present invention;

[0022] Figure 3 This is a front view schematic diagram of the installation of the tank lid and stirring assembly of the present invention;

[0023] Figure 4 This is a three-dimensional structural schematic diagram of the synchronous pressurization component of the present invention;

[0024] Figure 5 This is a three-dimensional structural schematic diagram of the feedback triggering component of the present invention;

[0025] Figure 6 This is a cross-sectional view of the extended scraping assembly of the present invention;

[0026] Figure 7 This is a cross-sectional structural diagram of the feedback triggering component of the present invention.

[0027] In the diagram: 1. Mixing tank, 2. Tank cover, 3. Feeding pipe, 4. Stirring assembly, 41. Rotating pipe, 42. Motor rotating assembly, 43. Stirring pipe, 5. Synchronous pressurizing assembly, 51. Support plate, 52. Guide rod, 53. Force plate, 54. Spring 1, 55. Compressed air bag, 56. Cam, 57. Air supply pipe, 58. Air replenishment pipe, 6. Feedback triggering assembly, 61. Feedback shell, 62. Moving piston, 63. Limiting slide rod, 64. Spring 2, 65. Trigger switch, 66. Pressurizing pipe, 67. Rotary sealing joint, 68. Electrically controlled valve, 69. Pressure relief valve, 610. Air pressure sensor, 611. Electric push rod, 612. Extrusion plate, 7. Extended scraping assembly, 71. Extending rod, 72. Pressure-bearing piston, 73. Spring 3, 74. Scraper, 75. Material passage hole, 8. Sealing ring, 9. Base, 10. Hydraulic push rod, 11. Lifting plate. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] like Figures 1-7As shown, a mixing device for processing tear-resistant and sound-insulating rubber pads includes a mixing tank 1, a PLC controller, and a tank cover 2 installed on the top of the mixing tank 1. Two bases 9 are symmetrically arranged on both sides of the mixing tank 1. Two hydraulic push rods 10 are symmetrically fixedly installed on the upper end of the bases 9. The top moving ends of the two hydraulic push rods 10 are fixedly connected to the same lifting plate 11. The lifting plate 11 is fixedly connected to one side of the tank cover 2. A feeding pipe 3 is fixedly installed on one side of the top of the tank cover 2. The device also includes a stirring assembly 4, a synchronous pressurizing assembly 5, a feedback triggering assembly 6, and an extended scraping assembly 7. The stirring assembly 4 is rotatably installed on the tank cover 2 and extends into the mixing tank 1. The synchronous pressurizing assembly 5 is fixedly installed on the tank cover 2 and the stirring assembly 4, and performs pressurization and air supply operation with the operation of the stirring assembly 4. The feedback triggering assembly 6 is connected to the synchronous pressurizing assembly 5 and judges the degree of stirring based on the amount of air supplied by the synchronous pressurizing assembly 5. The extended scraping assembly 7 is movably installed at the end of the stirring assembly 4 to scrape off the material adhering to the inner wall of the mixing tank 1.

[0030] The stirring assembly 4 includes a rotating tube 41 rotatably sleeved at the center of the tank cover 2. A motor rotating assembly 42 for driving the rotating tube 41 to rotate is fixedly installed at the upper end of the tank cover 2. Multiple stirring tubes 43 are symmetrically and fixedly connected to the tube wall of the rotating tube 41.

[0031] The synchronous pressurization assembly 5 includes a support plate 51 fixedly installed on the top of the tank cover 2. Multiple guide rods 52 are symmetrically fixedly connected to the side wall of the support plate 51. The same force plate 53 is slidably sleeved on the outside of the multiple guide rods 52. Multiple springs 54 sleeved on the outside of the guide rods 52 are fixedly connected between the force plate 53 and the support plate 51. A compression air bladder 55 is fixedly connected between the support plate 51 and the force plate 53. A cam 56 located on one side of the force plate 53 is fixedly sleeved on the wall of the rotating pipe 41. An air supply pipe 57 and an air replenishment pipe 58 communicating with the compression air bladder 55 are fixedly installed on the side wall of the support plate 51. A one-way valve is installed on both the air supply pipe 57 and the air replenishment pipe 58. The air supply pipe 57 is connected to the feedback trigger assembly 6.

[0032] The feedback triggering component 6 includes a feedback housing 61, within which a movable piston 62 is sealed. Multiple limiting slide rods 63 are fixedly connected to the rear side of the movable piston 62. The ends of the limiting slide rods 63 away from the movable piston 62 extend through the feedback housing 61. Multiple springs 64, sleeved on the limiting slide rods 63, are fixedly connected between the feedback housing 61 and the movable piston 62. A trigger switch 65, opposite to the movable piston 62, is fixedly installed on the rear side of the inner wall of the feedback housing 61. The upper side wall is also fixedly connected to a pressurizing pipe 66. The end of the pressurizing pipe 66 away from the feedback housing 61 is rotatably connected to the upper end of the rotating pipe 41 through a rotary sealing joint 67. An electric control valve 68, a pressure relief valve 69 and a pressure sensor 610 are installed on the pressurizing pipe 66 in sequence. An electric push rod 611 is also fixedly inserted on the rear side of the feedback housing 61. The moving end of the electric push rod 611 located inside the feedback housing 61 is fixedly connected to a push plate 612. The push plate 612 is arranged opposite to the moving piston 62.

[0033] The extended scraping assembly 7 includes multiple extended rods 71 ​​that are sealed and inserted into the end of the stirring tube 43 away from the rotating tube 41. One end of the extended rod 71 located inside the stirring tube 43 is fixedly connected to a pressure piston 72. The pressure piston 72 and the inner wall of the end of the stirring tube 43 are fixedly connected to a spring 73 that is sleeved outside the extended rod 71. The ends of the multiple extended rods 71 ​​located on the same side away from the stirring tube 43 are fixedly connected to the same scraper 74. The end of the scraper 74 away from the extended rod 71 is designed with an arc surface structure. Multiple material passage holes 75 are evenly opened on the surface of the scraper 74.

[0034] A sealing ring 8 is fixedly installed on the top of the mixing tank 1, which is located between the mixing tank 1 and the tank cover 2, so that the mixing tank 1 and the tank cover 2 are sealed together. The outer surfaces of the rotating tube 41, the stirring tube 43, the extension rod 71 and the scraper 74 are all coated with a layer of polytetrafluoroethylene coating.

[0035] The operating principle of the present invention is described as follows: Before mixing, the lid 2 is pushed up by the hydraulic push rod 10 in conjunction with the lifting plate 11, so that the lid 2 and the mixing tank 1 are relatively separated, the top of the mixing tank 1 is opened, the rubber raw material is put into the mixing tank 1, and then the lifting plate 11 is driven down by the hydraulic push rod 10, and the lid 2 and the mixing tank 1 are stably sealed and connected by the sealing ring 8.

[0036] The PLC controller controls the motor rotating assembly 42 to drive the rotating tube 41 to rotate at high speed, which in turn drives multiple stirring tubes 43 to rotate, achieving high-speed mixing. When the rotating tube 41 rotates, it drives the cam 56 to rotate synchronously. When the protrusion of the cam 56 pushes against the force plate 53, it drives the force plate 53 to move along the guide rod 52 against the elastic force of the spring 54 toward the support plate 51, thereby squeezing the compression bladder 55. The air in the compression bladder 55 is then pumped into the feedback shell 61 through the air supply pipe 57, causing the feedback shell 61 to move accordingly. The air pressure in the chamber in front of piston 62 increases. When the protrusion of cam 56 moves away from force plate 53, it is reset by spring 54, which in turn stretches the compression bladder 55 again. Air is then supplied to the compression bladder 55 through air supply pipe 58. As the rotating pipe 41 continues to rotate, the air pressure in feedback shell 61 gradually increases, causing moving piston 62 to move gradually against the elastic force of spring 64 in conjunction with limit slide rod 63. When the rotating pipe 41 drives stirring pipe 43 to provide sufficient stirring force to the rubber raw material... The piston 62 moves to its maximum position, pressing against the trigger switch 65. The trigger switch 65 sends a feedback signal to the PLC controller. The PLC controller first controls the feeding pipe 3 to add the corresponding agent into the mixing tank 1, and simultaneously increases the speed of the rotating pipe 41 driven by the motor rotating component 42. By briefly increasing the stirring speed, the "high shear force + strong turbulence effect" is used to quickly overcome the interfacial resistance between the agent and the rubber substrate, achieving uniform dispersion and stable bonding of the agent. At the same time, it avoids the risk of rubber deterioration caused by long-term high shear. After briefly increasing the stirring speed, the shear force increases quadratically, which can quickly break up agglomerates and refine them to several micrometers, ensuring that the agent particles and rubber molecular chains are in full contact. The short-term speed increase can break the laminar flow and form strong turbulence, increasing the agent diffusion coefficient by 3-5 times. It can diffuse from the addition point to the entire rubber system within 2-3 minutes, avoiding local concentration deviations. It also avoids the problem of the rubber temperature rapidly exceeding the safety threshold due to shear heat generated by constant high-speed stirring, which can lead to premature decomposition (scorching) of the added agent and excessive breakage of the rubber molecular chains.

[0037] After the trigger switch 65 is pressed and triggered, the PLC controller controls the electric valve 68 on the pressurizing pipe 66 to open and simultaneously starts the electric push rod 611. The electric push rod 611 pushes the extrusion plate 612 to act on the moving piston 62, thereby pressurizing the air delivered to the feedback shell 61 through the pressurizing pipe 66 into the rotating pipe 41, and continuing to deliver it into multiple stirring pipes 43. The increased air pressure in the stirring pipes 43 causes the pressurized piston 72 to push the extension rod 71 to move outward against the elastic force of the spring 73, thereby pushing the scraper 74 to abut against the inner wall of the mixing tank 1. As the scraper 74 moves in the mixing tank 1, it can effectively scrape off the material adhering to the inner wall of the mixing tank 1. As the rotating pipe 41 continues to rotate, the compressed air bag 55 continues to deliver air into the feedback shell 61, further increasing the air pressure in the stirring pipes 43 through the pressurizing pipe 66. The scraper 74 moves further toward the inner wall of the mixing tank 1, and the contact pressure between the scraper 74 and the inner wall of the mixing tank 1 gradually increases. By adopting this scraping method, the initial low scraping pressure can scrape off the soft and loose adhering material on the surface, avoiding the high pressure directly "pressing" the soft material into the tank wall gap (which would actually aggravate adhesion). The gradual increase in pressure can target the remaining hard adhering layer, and through the pressure superimposed shear force (the linear velocity of the rotating scraper + the friction force generated by the pressure), completely break the interface bonding force between the material and the tank wall, achieving "scraping without dead angles". It also avoids the "rigid impact" between the scraper 74 and the inner wall of the mixing tank 1, which would cause the scraper 74 to deform and the polished layer of the tank wall to wear if high pressure is applied from the beginning. The gradual increase in pressure can make the scraper 74 "flexibly fit" with the tank wall → gradually bear force, with an impact load ≤0.5kN, which significantly reduces equipment wear.

[0038] As the compressed air bag 55 continues to supply air, the air pressure in the stirring tube 43 gradually increases. The air pressure sensor 610 monitors the change in air pressure value in real time. When the air pressure increases to the set threshold, the PLC controller controls the pressure relief valve 69 to open, thereby rapidly releasing air. Under the action of the third spring 73, the scraper plate 74 is reset to the initial position, completing one scraping and cleaning operation. The PLC controller also controls the electric push rod 611 to drive the extrusion plate 612 to reset and move. Under the action of the second spring 64, the moving piston 62 is also pushed to reset to the initial position, and the stirring speed of the rotating tube 41 returns to normal.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mixing apparatus for processing tear-resistant and sound-insulating rubber pads, comprising a mixing tank (1), a PLC controller, and a tank cover (2) installed on the top of the mixing tank (1), wherein a feeding pipe (3) is fixedly installed on one side of the top of the tank cover (2), characterized in that, It also includes: a stirring assembly (4), a synchronous pressurizing assembly (5), a feedback triggering assembly (6), and an extended scraping assembly (7). The stirring assembly (4) is rotatably mounted on the tank cover (2) and extends into the mixing tank (1). The synchronous pressurizing assembly (5) is fixedly mounted on the tank cover (2) and the stirring assembly (4), and performs pressurization and gas supply operation with the operation of the stirring assembly (4). The feedback triggering assembly (6) is connected to the synchronous pressurizing assembly (5) and judges the degree of stirring based on the amount of gas supplied by the synchronous pressurizing assembly (5). The extended scraping assembly (7) is movably mounted at the end of the stirring assembly (4) and scrapes off the material adhering to the inner wall of the mixing tank (1).

2. The mixing apparatus for processing tear-resistant and sound-insulating rubber pads according to claim 1, characterized in that, The stirring assembly (4) includes a rotating tube (41) rotatably sleeved at the center of the tank cover (2). The upper end of the tank cover (2) is fixedly equipped with a motor rotating assembly (42) for driving the rotating tube (41) to rotate. The tube wall of the rotating tube (41) is symmetrically and fixedly connected to multiple stirring tubes (43).

3. The mixing apparatus for processing tear-resistant and sound-insulating rubber pads according to claim 2, characterized in that, The synchronous pressurization assembly (5) includes a support plate (51) fixedly installed on the top of the can lid (2). Multiple guide rods (52) are symmetrically fixedly connected to the side wall of the support plate (51). The same force plate (53) is slidably sleeved on the outside of the multiple guide rods (52). Multiple springs (54) sleeved on the outside of the guide rods (52) are fixedly connected between the force plate (53) and the support plate (51). A compression air bag (55) is fixedly connected between the support plate (51) and the force plate (53). A cam (56) located on one side of the force plate (53) is fixedly sleeved on the wall of the rotating tube (41). A supply air pipe (57) and a replenishment air pipe (58) communicating with the compression air bag (55) are fixedly installed on the side wall of the support plate (51). A one-way valve is installed on both the supply air pipe (57) and the replenishment air pipe (58). The supply air pipe (57) is connected to the feedback trigger assembly (6).

4. The mixing apparatus for processing tear-resistant and sound-insulating rubber pads according to claim 2, characterized in that, The feedback triggering component (6) includes a feedback housing (61), a movable piston (62) is sealed inside the feedback housing (61), and multiple limiting slide rods (63) are fixedly connected to the rear side of the movable piston (62). The end of the limiting slide rod (63) away from the movable piston (62) passes through the feedback housing (61). Multiple springs (64) sleeved on the limiting slide rods (63) are fixedly connected between the feedback housing (61) and the movable piston (62). A trigger switch (65) is fixedly installed on the rear side of the inner wall of the feedback housing (61) and is opposite to the movable piston (62). A pressure tube (66) is also fixedly connected to the upper side wall of the feedback housing (61). The end of the pressure tube (66) away from the feedback housing (61) is rotatably connected to the upper end of the rotating tube (41) through a rotary sealing joint (67). An electric control valve (68), a pressure relief valve (69) and a pressure sensor (610) are sequentially installed on the pressure tube (66).

5. The mixing apparatus for processing tear-resistant and sound-insulating rubber pads according to claim 2, characterized in that, The extended scraper assembly (7) includes multiple extended rods (71) that are sealed and inserted into the end of the stirring tube (43) away from the rotating tube (41). One end of the extended rod (71) located inside the stirring tube (43) is fixedly connected to a pressure piston (72). The pressure piston (72) and the inner wall of the end of the stirring tube (43) are fixedly connected to a spring three (73) sleeved outside the extended rod (71). The ends of the multiple extended rods (71) located on the same side away from the stirring tube (43) are fixedly connected to the same scraper plate (74).

6. The mixing apparatus for processing tear-resistant and sound-insulating rubber pads according to claim 5, characterized in that, The end of the scraper (74) away from the extension rod (71) is set with an arc surface structure, and the surface of the scraper (74) is uniformly provided with a plurality of material passage holes (75).

7. The mixing apparatus for processing tear-resistant and sound-insulating rubber pads according to claim 4, characterized in that, An electric push rod (611) is fixedly inserted on the rear side of the feedback housing (61). The moving end of the electric push rod (611) located inside the feedback housing (61) is fixedly connected to a push plate (612). The push plate (612) is arranged opposite to the moving piston (62).

8. The mixing apparatus for processing tear-resistant and sound-insulating rubber pads according to claim 5, characterized in that, A sealing ring (8) is fixedly installed on the top of the mixing tank (1) and is placed between the mixing tank (1) and the tank cover (2) to seal the mixing tank (1) and the tank cover (2) together. The outer surfaces of the rotating tube (41), stirring tube (43), extension rod (71) and scraper (74) are all coated with a layer of polytetrafluoroethylene coating.

9. The mixing apparatus for processing tear-resistant and sound-insulating rubber pads according to claim 1, characterized in that, The mixing tank (1) has two symmetrical bases (9) on both sides. Two hydraulic push rods (10) are symmetrically fixed on the upper end of the bases (9). The top moving ends of the two hydraulic push rods (10) are fixedly connected to the same lifting plate (11). The lifting plate (11) is fixedly connected to one side of the tank cover (2).

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