Process and device for preparing polyurethane composition for sound insulation sponge of automotive tire

Abstract

The present invention relates to the technical field of sponge preparation, and particularly relates to a process and device for preparing a polyurethane composition for sound insulation sponge of an automotive tire. The preparation process comprises: weighing polyether polyol, an isocyanate, a cross-linking agent, a foaming agent, a foam stabilizer, a catalyst and an auxiliary agent according to the corresponding proportions thereof; premixing the raw materials under preset temperature conditions to ensure that all the components are uniformly dispersed, so as to obtain a premix; and injecting the premix into a preparation device, and subjecting same to foam molding using the preparation device, so as to form polyurethane sponge. A sound insulation sponge that is used for an automotive tire and has both good sound insulation performance and good durability can be produced by means of the fine molding process.

Description

Preparation process and device of polyurethane composite material for automobile tire sound insulation sponge TECHNICAL FIELD

[0001] The present application relates to the technical field of sponge preparation, in particular to a preparation process and device of polyurethane composite material for automobile tire sound insulation sponge. BACKGROUND

[0002] The polyurethane composite material used in automobile tire sound insulation sponge is a high-performance and environmentally friendly material. It is made of polyurethane foam and some additives through a special process, and has excellent sound insulation performance, lightweight characteristics and good durability. This composite material can play a role in sound insulation and shock absorption in automobile tires, improve driving comfort, and also reduce noise during automobile driving and reduce environmental pollution. Its environmental performance meets the strategic requirements of energy saving and emission reduction in China and has been widely used.

[0003] The existing automobile tire sound insulation sponge has poor foaming effect in the preparation process, thereby reducing the quality of the sponge. SUMMARY

[0004] The purpose of the present application is to provide a preparation process and device of polyurethane composite material for automobile tire sound insulation sponge, which can ensure that the density, shape and performance of the sponge meet the design requirements. Through this fine forming process, we can produce automobile tire sound insulation sponge with excellent sound insulation performance and good durability.

[0005] To achieve the above purpose, in the first aspect, the present application also provides a preparation process of polyurethane composite material for automobile tire sound insulation sponge, comprising: taking corresponding polyether polyol, isocyanate, crosslinking agent, foaming agent, foam stabilizer, catalyst and additive according to the proportion;

[0006] Premix the raw materials under the preset temperature condition to ensure uniform dispersion of each component and obtain a premix;

[0007] Inject the premix into the preparation device and use the preparation device to foam and form polyurethane sponge.

[0008] The second aspect, the application further provides a preparation device for polyurethane compound for automobile tire sound insulation sponge, which comprises a supporting assembly, a heat dissipation assembly and a discharging assembly, the supporting assembly comprises a surrounding plate, a top plate, a door plate, a feeder, a negative pressure pump, a base, a supporting block and a first spring, the top plate is fixedly connected with the surrounding plate and located at the top of the surrounding plate, the door plate is rotatably connected with the top plate and located at the opening of the surrounding plate, the feeder is arranged on the top plate, the negative pressure pump is arranged on the top plate, the base is fixedly arranged at the bottom of the surrounding plate, the supporting block is slidably connected with the base and located at the opening of the bottom of the surrounding plate, the first spring is arranged between the supporting block and the base, the heat dissipation assembly is arranged on one side of the base, and the discharging assembly comprises a discharging plate, a pushing cylinder and a pushing block, the pushing cylinder is rotatably arranged on one side of the surrounding plate, the discharging plate is slidably connected with the surrounding plate and located at the opening of the bottom of the surrounding plate, and the pushing block is slidably connected with the discharging plate and connected with the output end of the pushing cylinder.

[0009] The door plate comprises a door plate body, a second cylinder, a moving block and a sealing strip, the door plate body is rotatably connected with the top plate and located on one side of the top plate, the moving block is slidably arranged on one side of the door plate body, the second cylinder is rotatably arranged on the surrounding plate, the output end of the second cylinder is rotatably connected with the moving block, and the sealing strip is arranged on the inner side of the door plate body.

[0010] The heat dissipation assembly comprises a heat dissipation fan, an air guide channel and a filter, the heat dissipation fan is arranged at the bottom of the base, the air guide channel is arranged on one side of the heat dissipation fan, and the filter is arranged at the air inlet of the heat dissipation fan.

[0011] The filter comprises a filter screen and a cleaning blade, the filter screen is arranged on the outer side of the heat dissipation fan, and the cleaning blade is rotatably connected with the filter screen and located on one side of the filter screen.

[0012] The discharging assembly further comprises a rotating plate, a second spring and a limiting block, the rotating plate is rotatably connected with the surrounding plate and located on one side of the door plate body, the second spring is arranged between the rotating plate and the surrounding plate, and the limiting block is fixedly arranged on one side of the rotating plate and used for limiting the rotation range of the door plate body.

[0013] This invention discloses a process and apparatus for preparing a polyurethane composite for automotive tire sound insulation foam, comprising: taking appropriate proportions of polyether polyol, isocyanate, crosslinking agent, foaming agent, foam stabilizer, catalyst, and additives; premixing the raw materials under a preset temperature condition to ensure uniform dispersion of each component, thereby obtaining a premix; injecting the premix into a preparation apparatus, and foaming and molding the premix into a polyurethane foam. This refined molding process enables the production of automotive tire sound insulation foam that possesses both excellent sound insulation performance and good durability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 is a flowchart of the preparation process of a polyurethane composite material for automotive tire sound insulation foam according to the first embodiment of the present invention.

[0016] Figure 2 is a structural diagram of the preparation apparatus according to the second embodiment of the present invention.

[0017] Figure 3 is a right-side structural diagram of the preparation apparatus according to the second embodiment of the present invention.

[0018] Figure 4 is a front structural diagram of the preparation apparatus according to the second embodiment of the present invention.

[0019] Figure 5 is a top cross-sectional view of the preparation apparatus according to the second embodiment of the present invention.

[0020] Figure 6 is a magnified view of detail A in Figure 5.

[0021] Figure 7 is a bottom structural diagram of the preparation apparatus according to the second embodiment of the present invention.

[0022] Support assembly 301, heat dissipation assembly 302, discharge assembly 303, enclosure 304, top plate 305, door panel 306, feeder 307, negative pressure pump 308, base 309, support block 310, first spring 311, discharge plate 312, push cylinder 313, push block 314, door panel body 315, second cylinder 316, moving block 317, sealing strip 318, cooling fan 319, air duct 320, filter 321, filter screen 322, cleaning blade 323, rotating plate 324, second spring 325, limit block 326, retraction block 327. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] First Embodiment

[0025] Please refer to Figure 1. This invention provides a process for preparing a polyurethane composite material for automotive tire sound insulation foam, comprising:

[0026] S101 uses the corresponding polyether polyol, isocyanate, crosslinking agent, foaming agent, foam stabilizer, catalyst and additives in the specified proportions;

[0027] We use various raw materials in precise proportions, including polyether polyols, isocyanates, crosslinking agents, foaming agents, foam stabilizers, catalysts, and additives. These raw materials undergo rigorous screening and testing to ensure smooth chemical reactions and impart excellent sound insulation and absorption properties to the final product.

[0028] S102 Premixes the raw materials under a preset temperature condition to ensure that the components are uniformly dispersed and to obtain a premix;

[0029] Next, we premixed these raw materials under preset temperature conditions. This step is crucial, as it ensures that the components are uniformly dispersed, avoiding inhomogeneities and defects in subsequent processing. By precisely controlling the temperature and stirring speed, we obtained a homogeneous premix, laying a solid foundation for subsequent foaming and molding.

[0030] S103 injects the premixed material into the preparation device and uses the preparation device to foam and form a polyurethane sponge.

[0031] The premixed material is injected into a specially designed preparation device, and then foamed using the device's molding technology to form polyurethane foam. In this step, we strictly control parameters such as temperature, pressure, and time in the preparation device to ensure that the foam's density, shape, and performance meet design requirements. Through this meticulous molding process, we are able to produce automotive tire sound insulation foam that possesses both excellent sound insulation performance and good durability.

[0032] Second Embodiment

[0033] Please refer to Figures 2-7. Based on the first embodiment, the present invention also provides a polyurethane composite material preparation device for automotive tire sound insulation foam. The preparation device includes a support assembly 301, a heat dissipation assembly 302, and a discharge assembly 303. The support assembly 301 includes a surrounding plate 304, a top plate 305, a door panel 306, a feeder 307, a negative pressure pump 308, a base 309, a support block 310, and a first spring 311. The top plate 305 is fixedly connected to the surrounding plate 304 and is located on top of the surrounding plate 304. The door panel 306 is rotatably connected to the top plate 305 and is located at the side opening of the surrounding plate 304. The feeder 307 is disposed on the top plate 305, and the negative pressure pump 308 is disposed on the top plate. On 305, the base 309 is fixed to the bottom of the surrounding plate 304, the support block 310 is slidably connected to the base 309 and located at the bottom opening of the surrounding plate 304, the first spring 311 is disposed between the support block 310 and the base 309, the heat dissipation assembly 302 is disposed on one side of the base 309, the discharge assembly 303 includes a discharge plate 312, a push cylinder 313 and a push block 314, the push cylinder 313 is rotatably disposed on one side of the surrounding plate 304, the discharge plate 312 is slidably connected to the surrounding plate 304 and located at the bottom opening of the surrounding plate 304, the push block 314 is slidably connected to the discharge plate 312 and connected to the output end of the push cylinder 313.

[0034] In this embodiment, the space for preparing sound-insulating sponge is formed by the surrounding plate 304 and the top plate 305. In use, the mixed raw materials are injected into the surrounding plate 304 through the feeder 307 provided on the top plate 305. Then, the negative pressure pump 308 is started to evacuate the space inside the surrounding plate 304, so that the raw materials foam in the surrounding plate 304 to obtain sound-insulating sponge. The sound-insulating sponge can be quickly cooled and shaped by the heat dissipation component 302. Then, the top plate 305 is rotated to open the top plate 305, and the push cylinder 313 is started to push the push block 314 to move to push out the discharge plate 312 and the sound-insulating sponge, and the sponge is removed, thereby making it more convenient to use.

[0035] The door panel 306 includes a door panel body 315, a second cylinder 316, a moving block 317, and a sealing strip 318. The door panel body 315 is rotatably connected to the top plate 305 and is located on one side of the top plate 305. The moving block 317 is slidably disposed on one side of the door panel body 315. The second cylinder 316 is rotatably disposed on the surrounding plate 304, and the output end of the second cylinder 316 is rotatably connected to the moving block 317. The sealing strip 318 is disposed on the inner side of the door panel body 315. Activating the second cylinder 316 can drive the moving block 317 to slide, thereby lifting the door panel body 315 to open it. After the material is discharged, the door panel body 315 moves downward under gravity and maintains a seal with the surrounding plate 304 through the sealing strip 318.

[0036] The heat dissipation assembly 302 includes a cooling fan 319, an air duct 320, and a filter 321. The cooling fan 319 is disposed at the bottom of the base 309, the air duct 320 is disposed on one side of the cooling fan 319, and the filter 321 is disposed at the air inlet of the cooling fan 319. The filter 321 filters the air passing through the cooling fan 319, and then the air is dispersed to the perimeter of the enclosure 304 through the air duct 320, thereby improving the heat dissipation and cooling effect.

[0037] The filter 321 includes a filter screen 322 and cleaning blades 323. The filter screen 322 is disposed on the outside of the cooling fan 319. The cleaning blades 323 are rotatably connected to the filter screen 322 and are located on one side of the filter screen 322. The cleaning blades 323 can rotate when air is intake, thereby scraping the outside of the filter screen 322 to remove adhering impurities, thus keeping the filter screen 322 in a clear state.

[0038] The discharge assembly 303 further includes a rotating plate 324, a second spring 325, and a limiting block 326. The rotating plate 324 is rotatably connected to the surrounding plate 304 and is located on one side of the door panel body 315. The second spring 325 is disposed between the rotating plate 324 and the surrounding plate 304. The limiting block 326 is fixed to one side of the rotating plate 324 to limit the rotation range of the door panel body 315. To prevent the discharge plate 312 from causing the sponge to retract when returning to its original position, this application provides that the rotating plate can rotate unidirectionally under the support of the limiting block 326. This allows the rotating plate 324 to rotate when the sound insulation sponge exits the surrounding plate 304, and the limiting block 326 supports the rotating plate 324 when the discharge plate 312 retracts, thus allowing for better material discharge.

[0039] Meanwhile, to avoid blocking the movement of the door panel body 315, a retraction block 327 is slidably provided between the rotating plate 324 and the surrounding plate 304. The rotating plate 324 is wedge-shaped, so that when the door panel body 315 moves down, it can push the rotating plate 324 and the retraction block 327 open. Then, when the door panel body is opened, the retraction block 327 is reset under the pull of the second spring 325, so as to be limited by the rotating plate 324.

[0040] Third Embodiment

[0041] This invention provides a polyurethane composite material for automotive tire sound insulation foam, wherein the raw materials, by weight percentage, include: 30-40% polyether polyol, 30-40% isocyanate, 0.5%-3% crosslinking agent, 1%-5% foaming agent, 0.5%-2% foam stabilizer, 0.1%-1% catalyst, and 1-5% additives.

[0042] In this embodiment, with the rapid development of the automotive industry, people have increasingly higher requirements for automotive comfort and safety. This invention provides a polyurethane composite specifically for automotive tire sound insulation foam. Polyether polyol is one of the main raw materials in polyurethane synthesis; its hydroxyl groups react with isocyanate to form polyurethane segments. Isocyanate is another important raw material in polyurethane synthesis, reacting with polyether polyol to form polyurethane segments. Crosslinking agents play a crosslinking role in polyurethane synthesis, increasing the connection points between polyurethane molecular chains, thereby improving its strength and stability. Foaming agents are key additives in the preparation of polyurethane foam; the gases generated by their decomposition cause the polyurethane to form a porous structure, thereby achieving sound insulation and vibration damping effects. Foam stabilizers stabilize the polyurethane foam formation process, preventing foam breakage or deformation during foaming, ensuring the quality and performance of the final product. Catalysts accelerate the polyurethane synthesis reaction and improve production efficiency. Different types of catalysts have a significant impact on the reaction rate and final performance of polyurethane. Additives are auxiliary components in the polyurethane composite, including anti-aging agents, flame retardants, antistatic agents, etc., which enhance the durability, safety, and functionality of the polyurethane foam. This allows for the production of tire sound-absorbing foam with excellent sound insulation properties. The foam material is characterized by low density, good softness, and strong sound absorption, effectively reducing tire noise and improving driving comfort. Furthermore, the material exhibits good weather resistance, water resistance, and durability, enabling it to adapt to various harsh operating environments.

[0043] The isocyanates mentioned include diphenylmethane diisocyanate (MDI) and toluene diisocyanate (TDI). MDI and TDI are the two most common isocyanates. MDI is widely used in coatings, adhesives, and elastomers due to its excellent weather resistance, chemical resistance, and mechanical properties. TDI, on the other hand, is widely used in polyurethane foams, elastomers, and coatings due to its lower cost and good processability.

[0044] The foaming agents include water, hydrogenated hydrocarbons, and organic foaming agents. Foaming agents are mainly used to introduce pores into polymers, thereby altering their physical and chemical properties. Common foaming agents include water, hydrogenated hydrocarbons, and organic foaming agents. Water, as an environmentally friendly foaming agent, plays an important role in the preparation of polyurethane foam. Hydrogenated hydrocarbons, with their good stability and thermal conductivity, are widely used in refrigeration equipment, insulation materials, and other fields. Organic foaming agents, such as azodicarbonamide, play an important role in plastics, rubber, and other fields due to their high-efficiency foaming performance and adjustable foaming conditions.

[0045] The additives include lubricants, flame retardants, and antioxidants.

[0046] Additives play a supporting and regulating role in chemical production, mainly including lubricants, flame retardants, and antioxidants. Lubricants can reduce the coefficient of friction of polymers during processing, improving production efficiency; flame retardants impart good flame-retardant properties to polymers, improving product safety; and antioxidants can delay the oxidation process of polymers, extending product lifespan. The widespread application of these additives in chemical production has made significant contributions to improving product quality, reducing production costs, and ensuring production safety.

[0047] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A preparation process for a polyurethane composite material for automotive tire sound insulation foam, characterized in that, include: Take the corresponding polyether polyol, isocyanate, crosslinking agent, foaming agent, foam stabilizer, catalyst and additives according to the proportions; The raw materials are premixed under a preset temperature condition to ensure that each component is uniformly dispersed to obtain a premixed material; The premixed material is injected into the preparation device and foamed to form a polyurethane sponge.

2. An apparatus for preparing a polyurethane composite material for automotive tire sound insulation foam, applied to a preparation process of a polyurethane composite material for automotive tire sound insulation foam, characterized in that, The preparation device includes a support assembly, a heat dissipation assembly, and a discharge assembly. The support assembly includes a surrounding plate, a top plate, a door plate, a feeder, a negative pressure pump, a base, a support block, and a first spring. The top plate is fixedly connected to the surrounding plate and located at the top of the surrounding plate. The door plate is rotatably connected to the top plate and located at the side opening of the surrounding plate. The feeder is disposed on the top plate, and the negative pressure pump is disposed on the top plate. The base is fixed to the bottom of the surrounding plate. The support block is slidably connected to the base and located at the bottom opening of the surrounding plate. The first spring is disposed between the support block and the base. The heat dissipation assembly is disposed on one side of the base. The discharge assembly includes a discharge plate, a pushing cylinder, and a pushing block. The pushing cylinder is rotatably disposed on one side of the surrounding plate. The discharge plate is slidably connected to the surrounding plate and located at the bottom opening of the surrounding plate. The pushing block is slidably connected to the discharge plate and connected to the output end of the pushing cylinder.

3. The apparatus for preparing a polyurethane composite material for automotive tire sound insulation foam as described in claim 2, characterized in that, The door panel includes a door panel body, a second cylinder, a moving block, and a sealing strip. The door panel body is rotatably connected to the top plate and is located on one side of the top plate. The moving block is slidably disposed on one side of the door panel body. The second cylinder is rotatably disposed on the enclosure plate, and the output end of the second cylinder is rotatably connected to the moving block. The sealing strip is disposed on the inner side of the door panel body.

4. The apparatus for preparing a polyurethane composite material for automotive tire sound insulation foam as described in claim 3, characterized in that, The heat dissipation assembly includes a cooling fan, an air duct, and a filter. The cooling fan is located at the bottom of the base, the air duct is located on one side of the cooling fan, and the filter is located at the air inlet of the cooling fan.

5. The apparatus for preparing a polyurethane composite material for automotive tire sound insulation foam as described in claim 4, characterized in that, The filter includes a filter screen and cleaning blades. The filter screen is disposed on the outside of the cooling fan, and the cleaning blades are rotatably connected to the filter screen and located on one side of the filter screen.

6. The apparatus for preparing a polyurethane composite material for automotive tire sound insulation foam as described in claim 5, characterized in that, The discharge assembly also includes a rotating plate, a second spring, and a limiting block. The rotating plate is rotatably connected to the surrounding plate and is located on one side of the door panel body. The second spring is disposed between the rotating plate and the surrounding plate. The limiting block is fixed to one side of the rotating plate to limit the rotation range of the door panel body.

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