Method and system for applying sound absorption layer onto noise reduction tire

Abstract

The present invention relates to the technical field of production systems for noise reduction tires. Provided are a method and a system for applying a sound absorption layer onto a noise reduction tire. The system comprises: a tire body, which is a base material to be subjected to application; a sound absorption layer configured to absorb noise generated by operation of the tire body; and an adhesive layer, which is coated between the tire body and the sound absorption layer, the adhesive layer being two-component silicone. The method for applying a sound absorption layer onto a noise reduction tire comprises the following steps: Sp1, preparing a tire body; Sp2, coating an inner wall of the tire body with an adhesive layer; and Sp3, pressing a sound absorption layer on a surface of the inner wall of the tire, and then bonding same by means of the adhesive layer. In the present invention, the primary curing time and the overall curing time are adjustable, and a certain initial fixing force can be achieved within a short time to bond the sound absorption material to the inner surface of the tire; and the overall curing time can be controlled to be within 24 hours, thereby achieving a degree of firmness of 100%.

Description

A method and system for applying a sound-absorbing layer to a noise-reducing tire Technical Field

[0001] The present invention relates to the technical field of noise reduction tire production systems, and in particular to a method and system for applying a sound-absorbing layer to a noise reduction tire. Background Art

[0002] Traditional methods for producing silent pneumatic tires include the following: 1) Using liquid rubber (typically neoprene) as a bonding material, spraying it onto the tire's inner wall, then applying sound-absorbing material to the glued area to create a bond between the two; 2) Using single-component silicone as a bonding material, applying it to the tire's inner wall, then applying the sound-absorbing (noise-absorbing) material; and 3) Using double-sided tape, pre-applying it to one side of the sound-absorbing material, then applying the sound-absorbing material, along with the double-sided tape, directly to the tire's inner wall to create a bond.

[0003] The main problems with the existing technical solutions for noise reduction tire sound absorption processing methods are as follows:

[0004] 1. Problem 1: The main problem is that the liquid rubber (usually chloroprene rubber) is sprayed into a mist or semi-condensation state under high pressure. The overall uniformity is difficult to ensure, and the spraying range is also difficult to stabilize within a certain range. In addition, the chloroprene rubber material itself has poor temperature resistance and can only withstand high temperatures of 120 degrees for a short time. It has poor cold resistance and its low-temperature operating range is generally not lower than -20 degrees. It is sensitive to process temperature during use (when the operating environment temperature exceeds the elastic state temperature, it will cause roller sticking, which brings difficulties to operation). Due to its strong crystallization tendency, the rubber will gradually harden after being placed for a long time, resulting in a decrease in adhesion and causing difficulties in forming processing (especially W-type chloroprene rubber). Neoprene has poor storage stability, and there will be phenomena such as decreased plasticity, increased hardness, shortened scorch time, and accelerated vulcanization speed. That is, in the processing technology, the fluidity of the rubber is reduced, the adhesion is poor, the surface of the extruded rubber blank and semi-finished product is rough, and it is easy to scorch. In severe cases, the rubber will be scrapped. Furthermore, this adhesive typically contains acetone, which is toxic, particularly anesthetic to the nervous system and irritating to mucous membranes, which can suppress breathing and cause breathing difficulties. These effects primarily suppress the central nervous system and cause anesthetics. Exposure to high concentrations can cause damage to the liver, kidneys, and pancreas. Overall, this process is highly hazardous and unstable.

[0005] 2. Problem 2: The main reason is that the initial adhesion of the corresponding single-component silicone is low, which can easily cause the sound-absorbing material to fall off during the application process or the later transportation process; and the curing time of the single-component silicone generally takes 48 to 72 hours, which will greatly increase the inventory and management cost pressure of tire companies.

[0006] 3. Problem three: The main issue is that the double-sided tape material requires pre-treatment before lamination. For example, applying the double-sided tape to one side of the sound-absorbing material first, or removing the adhesive barrier layer after the tape has already been applied, is a complex pre-treatment process. Furthermore, because the initial tack of double-sided tape is very high and the sponge material is relatively soft, problems such as wrinkles in the tape can easily occur. Furthermore, the automated equipment for removing the adhesive barrier layer is complex and can also easily cause wrinkles in the tape.

[0007] Summary of the Invention

[0008] Technical problems solved

[0009] In response to the shortcomings of the existing technology, the present invention provides a method and system for applying a noise-reducing tire sound-absorbing layer, which can shorten the glue curing time, improve tire production efficiency, and reduce storage and management costs.

[0010] Technical Solution

[0011] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for applying a noise-reducing tire sound-absorbing layer, the method comprising the following parts:

[0012] Tire body: base material for application;

[0013] Sound-absorbing layer: used to absorb the noise generated by the operation of the tire body;

[0014] An adhesive layer is coated between the tire body and the sound absorbing layer;

[0015] The method for applying the noise-reducing tire sound-absorbing layer comprises the following steps:

[0016] Sp1, prepare the tire body;

[0017] Sp2, applying an adhesive layer on the inner wall of the tire body;

[0018] Sp3, the sound absorbing layer is laminated on the inner wall surface of the tire and bonded by the adhesive layer.

[0019] Preferably, the adhesive layer is a two-component silicone rubber, and the two-component silicone rubber mixture is divided into component A and component B.

[0020] The component A comprises: polydimethylsiloxane, pigment a (optional) and filler a, wherein the polydimethylsiloxane accounts for 30%-60% by weight of the composition A, the pigment a accounts for 0%-2% by weight of the composition A (optional), and the remaining component of the composition A is filler a;

[0021] The B component comprises: polydimethylsiloxane, alkoxysilane, pigment b (optional), filler b, and an additive. The polydimethylsiloxane accounts for 20%-60% of the weight of the composition B, the alkoxysilane accounts for 1%-10% of the weight of the composition B, the pigment b accounts for 0%-2% of the weight of the composition B (optional), and the additive accounts for 1% of the weight of the composition B. The remaining components of the composition B are filler b.

[0022] Preferably, the method for applying the noise-reducing tire sound-absorbing layer further comprises the following steps:

[0023] Sp1: Prepare the composition A and the composition B separately, and store the composition A and the composition B in separate containers;

[0024] Sp2: A quantitative glue discharging device is provided at the end of the feed pump, and the feed pump is used to pump composition A and composition B into the quantitative glue discharging device respectively;

[0025] Sp3: The quantitative dispensing device injects composition A and composition B into the mixing tube according to a preset volume ratio for mixing. Composition A and composition B are mixed in the mixing tube glue gun, which is installed on the tooling equipment;

[0026] Sp4: Control the movement path of the mixing tube glue gun through either program control or manual control, or any combination thereof, to apply the two-component silicone rubber to the inner wall of the tire;

[0027] Sp5: Input the sound-absorbing layer to be applied into the interior of the tire, compact the sound-absorbing layer to the inner wall of the tire so that the two are fully adhered, and then the tire is transferred to the next station to wait for curing to be completed.

[0028] Preferably, the cross-section of the glue gun extruded is a cylindrical glue strip with a diameter of 0.1-15 mm, or glue of equivalent shapes.

[0029] Preferably, the system of the noise reduction tire sound absorbing layer application method includes:

[0030] A first feeding pump is used to deliver the composition A, wherein the liquid inlet end of the first feeding pump is connected to the container containing the composition A, and the liquid outlet end of the first feeding pump is connected to the quantitative glue discharging device;

[0031] A second feed pump is used to deliver the composition B. The liquid inlet end of the first feed pump is connected to the container containing the composition B, and the liquid outlet end is connected to the quantitative glue discharging device;

[0032] The quantitative glue discharging device has two liquid inlets and two liquid outlets, the two liquid inlets are connected to the liquid outlet ends of the first feed pump and the second feed pump respectively, and the two liquid outlets are connected to the glue valve;

[0033] The glue valve has two inlets and one outlet, the two inlets are respectively connected to the two liquid outlets of the quantitative glue dispensing device, and the outlet is connected to the mixing tube glue gun;

[0034] The mixing tube glue gun is installed on the tooling equipment and is used to discharge the glue from the pipeline and adhere it to the inner wall of the tire.

[0035] Preferably, the quantitative glue discharging device is provided with a group, and the composition stored in the quantitative device is quantitatively output until the storage amount of the composition reaches the glue replenishment position threshold set by the system, and the glue is automatically / manually replenished through the program.

[0036] Preferably, the quantitative glue discharging device is provided with at least two groups. When one group of quantitative glue discharging devices is discharging glue, the feed pump replenishes the glue liquid in the remaining quantitative glue discharging devices. The quantitative glue discharging devices of each group operate alternately to implement continuous quantitative output of glue liquid. The quantitative glue discharging device is provided with at least two groups, and the quantitative glue discharging devices are connected in parallel with each other. Beneficial effects

[0037] The present invention provides a method and system for applying a noise-reducing tire sound-absorbing layer. It has the following beneficial effects:

[0038] 1. The present invention uses two-component silicone as the adhesive between the tire body and the sound-absorbing cotton, thereby greatly shortening the entire sound-absorbing cotton processing time. The curing time of the two-component silicone bonding is shortened by 50% compared with the traditional process. The overall curing time is less than 24 hours. The sound-absorbing layer will not fall off or shift during the movement of the tire, and the ends of the sound-absorbing layer will not tear.

[0039] 2. The present invention uses two-component silicone as an adhesive for bonding processing, which greatly reduces the curing time, and no harmful substances are added to the ingredients, avoiding physical damage to workers during the production stage.

[0040] 3. The present invention adopts an extrusion processing technology, which avoids the irregular movement of the rubber material, increases the viscosity, improves the initial viscosity of the rubber material, avoids the displacement of the sound-absorbing cotton in the initial processing stage, improves the processing stability, and further improves the quality stability of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1 is a schematic diagram of a glue injection system provided by an embodiment of the present invention;

[0042] FIG2 is a schematic structural diagram of a glue gun and tooling equipment provided in an embodiment of the present invention;

[0043] FIG3 is a schematic diagram of one of the glue coating methods provided by an embodiment of the present invention;

[0044] FIG4 is a schematic diagram of another glue coating method provided by an embodiment of the present invention;

[0045] FIG5 is a schematic diagram of an application structure of a sound-absorbing layer provided by an embodiment of the present invention;

[0046] FIG6 is a schematic diagram of an application structure of another sound-absorbing layer provided by an embodiment of the present invention;

[0047] 7 is a graph showing the change in curing depth of a single-component adhesive over time, temperature, and humidity in the prior art;

[0048] FIG8 is a graph showing the change in curing depth of the two-component adhesive of the present invention with time, temperature, and humidity;

[0049] FIG9 is a perspective view of a quantitative glue dispensing device provided in an embodiment of the present invention;

[0050] FIG10 is a front view of a quantitative glue dispensing device provided in an embodiment of the present invention.

[0051] Among them: 11. First plunger pump; 12. Second plunger pump; 20. Quantitative glue discharging device; 21. Liquid inlet; 22. Liquid outlet; 30. Glue valve; 40. Mixing tube glue gun; 50. Tooling equipment; 60. Tire; 61. Sound-absorbing layer; 62. Rubber strip. DETAILED DESCRIPTION

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0053] Specific embodiment one:

[0054] As shown in the figure, a method and system for applying a sound-absorbing layer to a noise-reducing tire is described. The tire body and the sound-absorbing layer are prepared. The tire body must be thoroughly cleaned before manufacturing to ensure the inner wall is free of dust, grease, or other contaminants. The key to selecting the sound-absorbing layer material is its noise and vibration reduction performance. Typically, materials with moderate thickness and good sound absorption properties are selected, such as specialized foams or composite materials. These materials must be cut to the appropriate tire size before application.

[0055] The preparation and application of composite silicone rubber consists of two parts: Composition A and Composition B. Composition A primarily consists of polydimethylsiloxane, a pigment (such as titanium oxide or iron oxide), and a filler (such as calcium carbonate). Composition B contains polydimethylsiloxane, an alkoxysilane (such as vinyltrimethoxysilane), and the corresponding filler. These two compositions must be prepared separately and stored in separate containers before use.

[0056] During the application process, the two compositions are first pumped into a metered glue dispensing device using a feed pump. It should be noted that feed pumps include plunger pumps, pressure pumps, and other structures capable of feeding the compositions. A suitable pump or other product can be selected based on actual needs. The device then injects the two compositions into a mixing hose at a preset volume ratio for mixing. The mixed glue is then evenly applied to the tire's inner wall using a mixing hose gun mounted on tooling. This step requires precise control to ensure a uniform, bubble-free, and complete glue layer. Tooling equipment includes, but is not limited to, robotic arms, robots, or other tooling.

[0057] After applying the adhesive layer, the sound-absorbing layer is fed into the tire via a dedicated track system. Before the adhesive cures, the layer is precisely compacted to the tire's inner wall, ensuring no gaps between the layer and the adhesive. After this step, the tire moves to the next station for curing.

[0058] During the curing process, the tire is kept in a controlled temperature and humidity environment for a certain period of time to ensure that the rubber layer is completely hardened and firmly bonds the sound absorbing layer to the inner wall of the tire. The length of curing time depends on the characteristics of the silicone used and the environmental conditions.

[0059] Quality control is crucial throughout the manufacturing process. After applying the adhesive, the thickness, uniformity, and color of the adhesive layer are inspected to ensure a smooth mix and the absence of defects. After the sound-absorbing layer is applied, its adhesion strength and positional accuracy are inspected. Furthermore, the finished tire undergoes acoustic testing to verify that its noise reduction performance meets the expected standards.

[0060] Safety and the Environment: Throughout the manufacturing process, operators should wear appropriate personal protective equipment, such as protective gloves and glasses, to prevent direct contact with the adhesive. Also, ensure good ventilation in the workshop to prevent the accumulation of harmful gases. All waste and residues should be handled in accordance with environmental regulations to minimize environmental impact.

[0061] Specific embodiment two:

[0062] As shown in the figure, a method for applying a sound-absorbing layer to a noise-reducing tire includes the following steps:

[0063] Tire body: base material for application;

[0064] Sound-absorbing layer: used to absorb the noise generated by the operation of the tire body;

[0065] An adhesive layer is applied between the tire body and the sound-absorbing layer, and the adhesive layer is a two-component silicone;

[0066] The method for applying the noise-reducing tire sound-absorbing layer comprises the following steps:

[0067] Sp1. Clean the inner wall of the tire body. Use laser cleaning or other cleaning methods to make the inner wall of the tire clean and dust-free.

[0068] Sp2, inspect the inner wall of the tire;

[0069] Sp3, applying an adhesive layer on the inner wall of the tire body;

[0070] Sp4, test the gluing effect;

[0071] Sp5, the sound absorbing layer is laminated on the inner wall surface of the tire and bonded by the adhesive layer.

[0072] A method for applying a sound-absorbing layer of a noise-reducing tire,

[0073] The adhesive layer is made of two-component silicone, and the two-component silicone mixture is divided into component A and component B.

[0074] Component A comprises: polydimethylsiloxane, pigment a (optional), and filler a, wherein polydimethylsiloxane accounts for 30%-60% by weight of composition A, pigment a accounts for 0%-2% by weight of composition A (optional), and the remaining component of composition A is filler a;

[0075] Component B is: polydimethylsiloxane, alkoxysilane, pigment b (optional), filler b, and additives. Polydimethylsiloxane accounts for 20%-60% of the weight of composition B, alkoxysilane accounts for 1%-10% of the weight of composition B, pigment b accounts for 0%-2% of the weight of composition B (optional), and additives account for 1% of the weight of composition B; the remaining components of composition B are filler b.

[0076] The method for applying the noise-reducing tire sound-absorbing layer further comprises the following steps:

[0077] Sp1: Prepare composition A and composition B separately, and store composition A and composition B in separate containers;

[0078] Sp2: Use a plunger pump to pump composition A and composition B into a quantitative glue dispensing device respectively;

[0079] Sp3: The quantitative dispensing device injects composition A and composition B into the mixing tube according to a preset volume ratio for mixing. Composition A and composition B are mixed in the mixing tube glue gun, which is installed on the tooling equipment;

[0080] Sp4: Apply the two-component silicone to the inner wall of the tire through program control or manual control of the movement path of the mixing tube glue gun;

[0081] Sp5: Input the sound-absorbing layer to be applied into the interior of the tire, compact the sound-absorbing layer to the inner wall of the tire so that the two are fully adhered, and then the tire is transferred to the next station to wait for curing to be completed.

[0082] The glue gun extrude a cylindrical rubber strip with a diameter of 0.1-15mm, or an equivalent amount of glue in other shapes. There are at least two groups of quantitative glue discharging devices. When one group of quantitative glue discharging devices is discharging glue, the plunger pump replenishes the glue in the other quantitative glue discharging devices. The quantitative glue discharging devices of each group operate alternately to implement continuous quantitative output of glue.

[0083] A system for applying a noise-reducing tire sound-absorbing layer, comprising:

[0084] a first plunger pump for conveying composition A, wherein the liquid inlet of the first plunger pump is connected to the container for containing composition A, and the liquid outlet is connected to the quantitative glue discharging device;

[0085] A second plunger pump is used to deliver composition B, wherein the liquid inlet end of the first plunger pump is connected to the container for containing composition B, and the liquid outlet end is connected to the quantitative glue discharging device;

[0086] The quantitative glue discharging device has two liquid inlets and two liquid outlets, the two liquid inlets are respectively connected to the liquid outlet ends of the first plunger pump and the second plunger pump, and the two liquid outlets are connected to the glue valve;

[0087] The glue valve has two inlets and one outlet. The two inlets are connected to the two liquid outlets of the quantitative glue dispensing device respectively, and the outlet is connected to the mixing tube glue gun;

[0088] The mixing tube glue gun, mounted on the tooling, discharges glue from the pipe and deposits it on the tire's inner wall. There are at least two sets of quantitative glue dispensing devices, each connected in parallel. Each set of quantitative glue dispensing devices dispenses a fixed amount of the stored composition until the amount reaches the system-set refill threshold. Glue is then replenished automatically or manually via the program.

[0089] As shown in Figures 7 and 8, the data reveals the difference in performance between two-component A and B rubber products and ordinary single-component products. This can help tire companies shorten the curing waiting time by more than 50% and reduce inventory and management costs.

[0090] The viscosity of each component of the two-component adhesive is between 50,000 and 200,000 mPa·s (at room temperature), and the ratio of component A to component B is 10:1 to 1:10 (volume ratio). Typical colors are white, black, or two different colors that form a third color after mixing, which facilitates visual inspection (e.g., ensuring uniform mixing) and facilitates on-line quality control.

[0091] The density of each component of the two-component adhesive and after mixing is: 1.0~1.8g / cm3;

[0092] Compared to single-component silicone, two-component silicone can form initial bonding strength within 2 to 10 minutes, and the thickness of the adhesive layer is 0.1mm to 10mm, and it cures quickly. The higher the temperature, the faster the curing. It is not affected by ambient humidity, allowing the production line to produce efficiently and quickly enter the next process. At room temperature, it takes about 2 hours to reach a high bonding strength of 0.9MPa.

[0093] The test data shown in Figure 8 is based on the following components:

[0094] Composition A

[0095] Composition B

[0096] Two-component silicone

[0097] Specific embodiment three:

[0098] As shown in FIG1 , a glue injection system for applying a tire sound-absorbing layer includes:

[0099] A first plunger pump 11 is used to transport the composition A. The liquid inlet end of the first plunger pump 11 is connected to the container containing the composition A, and the liquid outlet end is connected to the quantitative glue discharging device 20;

[0100] The second plunger pump 12 is used to transport the composition B. The liquid inlet end of the first plunger pump 11 is connected to the container containing the composition B, and the liquid outlet end is connected to the quantitative glue discharging device 20;

[0101] The quantitative glue discharging device 20, as shown in Figures 9 and 10, has two liquid inlets 21 and two liquid outlets 22. The two liquid inlets are respectively connected to the liquid outlet ends of the first plunger pump 11 and the second plunger pump 12, and the two liquid outlets 22 are connected to the glue valve 30. The end of the glue valve 30 is provided with a mixing discharge pipe; the specific structure and principle of the quantitative glue discharging device 20 can be selected from the existing technology, such as Patent No. 201921065808.2 "A quantitative dispensing machine for new energy power battery manufacturing" or Patent No. 202021346561.4 "An automatic detection mechanism for quantitative cylinder leakage and quantitative glue discharging machine", which will not be described in detail.

[0102] The glue valve 30 has two inlets and one outlet. The two inlets are connected to the two liquid outlets 22 of the quantitative glue dispensing device 20, and the outlet is connected to the glue gun 40.

[0103] The mixing tube glue gun 40 is installed on the tooling equipment 50 and is used to discharge the glue from the pipeline and adhere it to the inner wall of the tire 60.

[0104] As shown in Figure 1, there are at least two groups of quantitative glue discharging devices 20, and each quantitative glue discharging device 20 is connected in parallel. The quantitative glue discharging devices 20 can also be set in groups until the storage amount of the composition reaches the "glue replenishment position threshold" set by the system, and the glue is automatically / manually replenished through the program, which further illustrates the operation process of the entire technical solution. The solution can be a single group of metering output or multiple groups of metering output. Because the metering cylinder capacity of the metering system is limited, through this solution, after the output of A and B glue in one metering system is completed, the A and B glue of the other group are seamlessly switched, and at the same time, the previous group of metering systems starts to refill A and B glue, and this cycle is repeated, so as to achieve the effect of continuous output of glue at the front end, and can continuously output two-component silicone rubber. The A and B glues with good ratios are input into the mixing hose through the front end glue valve 30 for mixing, and finally output to the required application area.

[0105] As shown in Figure 2, the front-end glue valve 30 is mounted on a robotic arm. It is controlled by a program and moves along the desired path, applying precisely measured and mixed glues A and B. The application process can be performed by rotating the tire 60 and finely moving the tooling 50 along the path within a certain range. Alternatively, the tire 60 can be stationary, and the tooling 50 can simply follow the path to complete the application. As shown in Figures 3 and 4, the applied glue strips 62 of glue A and B typically have a diameter of 0.1-15 mm and vary in shape, ranging from strips to rectangles or other shapes. The path can also be straight or curved.

[0106] Specific embodiment four:

[0107] A method for applying a sound-absorbing layer to a noise-reducing tire, the method comprising the following steps:

[0108] Tire body: base material for application;

[0109] Sound-absorbing layer: used to absorb the noise generated by the operation of the tire body;

[0110] An adhesive layer is applied between the tire body and the sound-absorbing layer, and the adhesive layer is a two-component silicone;

[0111] The method for applying the noise-reducing tire sound-absorbing layer comprises the following steps:

[0112] Sp1. Prepare the tire body and clean the inner wall of the tire by laser cleaning or other cleaning methods to make the inner wall of the tire clean and dust-free;

[0113] Sp2, applying an adhesive layer on the inner wall of the tire body;

[0114] Sp3, check the gluing effect;

[0115] Sp4, the sound-absorbing layer is laminated to the inner wall surface of the tire and bonded by an adhesive layer. The adhesive layer is a two-component silicone, and the two-component silicone mixture is divided into component A and component B. Component A comprises: polydimethylsiloxane, pigment a, and filler a. The polydimethylsiloxane accounts for 30% to 60% by weight of the composition A, the pigment a accounts for 1% to 2% by weight of the composition A, and the remainder of the composition A is filler a.

[0116] Component B is: polydimethylsiloxane, alkoxysilane, pigment b and filler b, polydimethylsiloxane accounts for 20%-60% of the weight of composition B, alkoxysilane accounts for 10%-20% of the weight of composition B, and pigment b accounts for 1%-2% of the weight of composition B; the remaining components of composition B are filler b.

[0117] Specific embodiment five:

[0118] A technical solution is further disclosed for a method of applying a sound-absorbing layer to a noise-reducing tire. The adhesive layer is a multi-component mixture. In the previous embodiment, the component mixture includes component A and component B. In this embodiment, the adhesive layer is further a multi-component mixture, and the components include but are not limited to component A and component B in the previous embodiment. Other equivalent alternative products that regulate, enhance, or modify the performance of the adhesive layer or other multi-component adhesives that produce similar effects can also be adjusted or added.

[0119] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the statement "comprising a reference structure" does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0120] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for applying a noise-reducing tire sound-absorbing layer, characterized in that: The noise reduction tire sound absorbing layer application method comprises the following parts: Tire body: substrate for application; Sound-absorbing layer: used to absorb the noise generated by the operation of the tire body; An adhesive layer is coated between the tire body and the sound absorbing layer; The method for applying the noise reduction tire sound absorbing layer comprises the following steps: Sp1. Prepare the tire body; Sp2, coating an adhesive layer on the inner wall of the tire body; Sp3, the sound absorbing layer is laminated on the inner wall surface of the tire and bonded by the adhesive layer; The adhesive layer is a silica gel mixture, and the silica gel mixture has two or more components.

2. A method for applying a noise reduction tire sound absorbing layer according to claim 1, characterized in that: The adhesive layer is a two-component silicone, and the two-component silicone mixture is divided into component A and component B. The component A comprises: polydimethylsiloxane, pigment a (optional) and filler a, wherein the polydimethylsiloxane accounts for 30%-60% by weight of the composition A, the pigment a accounts for 0%-2% by weight of the composition A (optional), and the remaining component of the composition A is filler a; The component B comprises: polydimethylsiloxane, alkoxysilane, pigment b (optional), filler b and auxiliary agent, wherein the polydimethylsiloxane accounts for 20%-60% of the weight of the composition B, the alkoxysilane accounts for 1%-10% of the weight of the composition B, the pigment b accounts for 0%-2% of the weight of the composition B (optional), and the auxiliary agent accounts for 1% of the weight of the composition B; the remaining components of the composition B are filler b.

3. The method for applying a noise reduction tire sound absorbing layer according to claim 1, characterized in that: The noise reduction tire sound absorbing layer application method further comprises the following steps: Sp1: prepare the composition A and the composition B respectively, and store the composition A and the composition B in separate containers respectively; Sp2: A quantitative glue discharging device is provided at the end of the feed pump, and the feed pump is used to pump the composition A and the composition B into the quantitative glue discharging device respectively; Sp3: The quantitative glue dispensing device injects the composition A and the composition B into the mixing tube according to the preset volume ratio for mixing, and the composition A and the composition B are mixed in the mixing tube glue gun, and the mixing tube glue gun is installed on the tooling equipment; Sp4: Control the movement path of the mixing tube glue gun by program control or manual control or a combination of these to apply the two-component silicone rubber on the inner wall of the tire; Sp5: Input the sound-absorbing layer to be applied into the tire, compact the sound-absorbing layer to the inner wall of the tire, make the two fully adhere to each other, and then transfer the tire to the next station to wait for curing to be completed.

4. The method for applying a noise reduction tire sound absorbing layer according to claim 3, characterized in that: The cross section of the glue gun extruded is a cylindrical glue strip with a diameter of 0.1-15mm, or glue of the same amount and other shapes.

5. A system for applying a noise reduction tire sound absorbing layer according to any one of claims 1 to 4, characterized in that: The system comprises: A first feeding pump, used for conveying the composition A, wherein the liquid inlet end of the first feeding pump is connected to the container for containing the composition A, and the liquid outlet end of the first feeding pump is connected to the quantitative glue discharging device; A second feed pump is used to deliver the composition B, wherein the liquid inlet end of the first feed pump is connected to the container for containing the composition B, and the liquid outlet end of the first feed pump is connected to the quantitative glue discharging device; A quantitative glue discharging device has two liquid inlets and two liquid outlets, the two liquid inlets are respectively connected to the liquid outlet ends of the first feed pump and the second feed pump, and the two liquid outlets are connected to the glue valve; The glue valve has two inlets and one outlet, the two inlets are respectively connected to the two liquid outlets of the quantitative glue dispensing device, and the outlet is connected to the mixing tube glue gun; The mixing tube glue gun is installed on the tooling equipment and is used to discharge the glue from the pipeline and attach it to the inner wall of the tire.

6. The system of the method for applying the noise reduction tire sound absorbing layer according to claim 5, characterized in that: The quantitative glue discharging device is provided with a group, and the composition stored in the quantitative device is quantitatively output until the storage amount of the composition reaches the replenishment glue amount position threshold set by the system, and then the glue is automatically / manually replenished through the program.

7. The system of the method for applying a noise reduction tire sound absorbing layer according to claim 5, characterized in that: The quantitative glue discharging device is provided with at least two groups. When one group of the quantitative glue discharging devices is discharging glue, the feed pump replenishes the glue liquid in the other quantitative glue discharging devices. The quantitative glue discharging devices of each group are operated alternately to implement continuous quantitative output of the glue liquid. The quantitative glue discharging device is provided with at least two groups, and the quantitative glue discharging devices are connected in parallel with each other.

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