Noise-reducing tire

Abstract

The invention provides a noise-reducing tire which is mainly characterized in that a noise-reducing layer is laid on the inner top wall of the inner surface of the tire in a tire body, and the noise-reducing layer is an integrally-formed non-foaming body or an integrally-formed foaming body which is formed by solidifying a fluid PU material and is uniform in thickness or non-uniform in thickness; wherein the noise reduction layer is a long strip-shaped structural body or a ring-shaped structural body, so that the problems that the manufacturing process is complicated and the noise reduction structure is not tightly attached in the prior art can be effectively solved, the production cost of a manufacturing end is reduced, and the market competitiveness of a product is improved.

Description

Technical Field

[0001] The present invention relates to a tire, in particular to a noise-reducing tire. Background Art

[0002] When a vehicle is driving on the road, the tires in contact with the road surface will generate a variety of tire noises. In addition to directly disturbing the surrounding residents, many tire noises will also be transmitted into the vehicle body through components such as the suspension system, thereby affecting the comfort of the vehicle passengers. If this noise is too loud, it will affect the driver's attention. In addition, electric vehicles, which are gaining market share, do not have engines, so the overall noise is lower than that of traditional fuel vehicles. Generally, the noise generated by the tires is the largest, which has led to many countries in the world issuing relevant regulations on tire noise for electric vehicles. Due to the above reasons, technologies for reducing noise in the tire part have appeared on the market, such as those disclosed in US Patents US11,446,888B2, US10,315,468B2, US10,259,271B2 and US 9,517,661 B2.

[0003] However, the above prior arts all have shortcomings that need to be improved:

[0004] The prior art disclosed in US Pat. No. 11,446,888B2 mainly adheres a structure similar to an air cushion (noise reduction structure) to the inner surface of the tire to achieve the purpose of noise reduction. However, the air cushion design has the disadvantage of complicated process, which is not conducive to reducing production costs at the manufacturing end.

[0005] The prior art disclosed in U.S. Pat. No. 10,315,468B2 mainly achieves the purpose of noise reduction by adhering noise reduction strips (noise reduction structures) that are not connected at the head and tail to the inner surface of the tire. However, the noise reduction strips are not completely attached to the inner surface of the tire and are discontinuous, which has the risk of being easily fallen off and damaged, and is not conducive to the market competitiveness of the product.

[0006] The prior art disclosed in US Pat. No. 10,259,271B2 mainly utilizes a patch to press the noise reduction structure onto the inner surface of the tire. However, the two different types of structures have the disadvantage of complicated manufacturing process, which is not conducive to reducing production costs at the manufacturing end.

[0007] The prior art disclosed in US Pat. No. 9,517,661 B2 mainly achieves the purpose of noise reduction by adhering polypropylene fibers, fibers and mineral fillers to the inner surface of the tire. However, polypropylene materials are generally hard, and the noise reduction structure is adhered in the form of fibers. There is a risk that the noise reduction structure is not tightly attached and is easy to fall off, which is not conducive to the market competitiveness of the product.

[0008] Therefore, a noise-reducing tire with a simplified manufacturing process and a tightly fitting noise-reducing structure is urgently expected by the current relevant industries. Summary of the invention

[0009] The main purpose of the present invention is to provide a noise-reducing tire, which mainly comprises a noise-reducing layer laid on the inner top wall of the inner surface of the tire in the tire body, wherein the noise-reducing layer is an integrally formed non-foamed body or an integrally formed foamed body of uniform thickness or uneven thickness solidified from a fluid PU material, wherein the noise-reducing layer is a long strip-shaped structure or a ring-shaped structure, so as to effectively solve the problems of complicated process and insufficient tightness of the noise-reducing structure in the prior art.

[0010] To achieve the above object, the present invention mainly provides a noise-reducing tire.

[0011] According to a first embodiment of the present invention, a noise reduction tire is provided, the noise reduction tire comprising a tire body, a tire contact surface, a tire inner surface and a noise reduction layer; wherein the tire body has a hollow space for accommodating a wheel frame; wherein the tire contact surface is located outside the tire body; wherein the tire inner surface is located inside the tire body relative to the tire contact surface, and the tire inner surface comprises an inner top wall and two inner side walls located on both sides of the inner top wall; wherein the noise reduction layer is circumferentially laid on the inner top wall of the tire inner surface, and ... The layer is a one-piece non-foamed body or one-piece foamed body of uniform or uneven thickness solidified by a fluid PU material; wherein the manufacturing method of the noise reduction tire comprises the following steps: step S1: providing a tire driving device for driving a tire body to uprightly rotate with controllable timing or constant speed to form a tire upright rotating state; step S2: providing a fluid PU material pouring device, the fluid PU material pouring device is provided with a pouring head, the pouring head is used to be placed in a hollow space of the tire body to pass the pouring head A fluid PU material is poured downward onto an inner top wall of an inner surface of a tire inside the tire body; Step S3: Provide the tire body and make the tire body form an upright rotation state of the tire on the tire driving device; Step S4: Perform a fluid PU material pouring operation, which is to use the pouring head to pour the fluid PU material onto the inner top wall of the inner surface of the tire. When the pouring head pours and lays at least one ring of the fluid PU material on the inner top wall of the inner surface of the tire, the fluid PU material pouring operation is completed; Step S5: Perform a fluid The fluid-like PU material diffusion operation is to diffuse the area occupied by the fluid-like PU material on the inner top wall of the inner surface of the tire through the centrifugal force generated by the rotation of the tire body. When the fluid-like PU material is completely diffused, the fluid-like PU material diffusion operation is completed; and step S6: the fluid-like PU material is solidified on the inner top wall of the inner surface of the tire to form a noise reduction layer of an integrally molded non-foamed body or an integrally molded foamed body with uniform or uneven thickness, thereby completing a noise reduction tire, which helps to reduce the production cost at the manufacturing end and increase the market competitiveness of the product.

[0012] According to a second embodiment of the present invention, a noise reduction tire is provided, which includes a tire body, a tire contact surface, a tire inner surface and a noise reduction layer; wherein the tire body has a hollow space for accommodating a wheel frame; wherein the tire contact surface is located outside the tire body; wherein the tire inner surface is located inside the tire body relative to the tire contact surface, and the tire inner surface includes an inner top wall and two inner side walls located on both sides of the inner top wall; wherein the noise reduction layer is a long strip-shaped structure, the noise reduction layer is closely adhered to the inner top wall of the tire inner surface by an adhesive unit, and the noise reduction layer is a one-piece non-foamed body or a one-piece non-foamed body of uniform or uneven thickness solidified by a fluid-like PU material. The method for manufacturing the noise reduction tire comprises the following steps: step S1: providing a long continuous noise reduction belt, wherein the long continuous noise reduction belt is an integrally formed non-foamed body or an integrally formed foamed body with uniform thickness or uneven thickness solidified by a fluid PU material; step S2: providing a tire body; step S3: cutting the long continuous noise reduction belt into a noise reduction layer of a long strip-shaped structure according to the ring length of an inner top wall of an inner surface of a tire in the tire body; and step S4: closely adhering the noise reduction layer to the inner top wall of the inner surface of the tire through an adhesive unit, thereby completing a noise reduction tire, so as to help reduce the production cost of the manufacturing end and increase the market competitiveness of the product.

[0013] According to a third embodiment of the present invention, a noise reduction tire is provided, the noise reduction tire comprising a tire body, a tire contact surface, a tire inner surface and a noise reduction layer; wherein the tire body has a hollow space for accommodating a wheel frame; wherein the tire contact surface is located outside the tire body; wherein the tire inner surface is located inside the tire body relative to the tire contact surface, and the tire inner surface comprises an inner top wall and two inner side walls located on both sides of the inner top wall; wherein the noise reduction layer is an annular structure, the noise reduction layer is closely adhered to the inner top wall of the tire inner surface by an adhesive unit, and the noise reduction layer is solidified by a fluid-like PU material The method for manufacturing a noise reduction tire comprises the following steps: step S1: providing a noise reduction layer as a ring-shaped structure, and the noise reduction layer is an integrally formed non-foamed body or an integrally formed foamed body with uniform or uneven thickness solidified from a fluid-like PU material; step S2: providing a tire body; and step S3: adhering the noise reduction layer to an inner top wall of an inner surface of a tire in the tire body in a ring-shaped manner through an adhesive unit, thereby completing a noise reduction tire, which helps to reduce the production cost at the manufacturing end and increase the market competitiveness of the product.

[0014] In an embodiment of the present invention, when the noise reduction layer is an integrally formed non-foamed body, the thickness of the noise reduction layer is 1 mm to 100 mm; wherein when the noise reduction layer is an integrally formed foamed body, the thickness of the noise reduction layer is 0.5 mm to 50 mm.

[0015] In an embodiment of the present invention, when the noise reduction layer is composed of a non-foamed body, the fluid PU material forming the noise reduction layer is further composed of trifunctional polyether polyol, copolymerized trifunctional polyether polyol, difunctional polyether polyol, isocyanate, filler, anti-settling agent, dehydrating agent and catalyst; wherein when the noise reduction layer is composed of a foamed body, the fluid PU material forming the noise reduction layer is further composed of trifunctional polyether polyol, copolymerized trifunctional polyether polyol, difunctional polyether polyol, isocyanate, filler, anti-settling agent, foaming agent, dehydrating agent and catalyst.

[0016] In a further embodiment of the present invention, the fluid PU material forming the noise reduction layer is composed of 0.1wt% to 60wt% of trifunctional polyether polyol, 0.1wt% to 60wt% of copolymerized trifunctional polyether polyol, 0.1wt% to 50wt% of difunctional polyether polyol, 3 to 35wt% of isocyanate, 0.1wt% to 60wt% of filler, 0.1wt% to 5wt% of anti-settling agent, 0.1wt% to 1wt% of foaming agent, 0.1wt% to 3wt% of dehydrating agent and 0.1wt% to 2wt% of catalyst, and the sum of the above ingredients is 100wt%.

[0017] In a further embodiment of the present invention, the fluid PU material forming the noise reduction layer is composed of 8.8wt% of trifunctional polyether polyol, 12wt% of copolymerized trifunctional polyether polyol, 24wt% of difunctional polyether polyol, 20wt% of isocyanate, 32wt% of filler, 0.8wt% of anti-settling agent, 0.24wt% of catalyst and 2.16wt% of dehydrating agent, and the sum of the above ingredients is 100wt%.

[0018] In an embodiment of the present invention, before step S2, the inner top wall of the inner surface of the tire in the tire body is further roughened so that the inner top wall is formed into a roughened surface for increasing the bonding strength of the noise reduction layer on the inner top wall.

[0019] In the present invention, "wt%" means percentage by weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic plan view of a front cross section of the first embodiment of the present invention.

[0021] Figure 2 yes Figure 1 A three-dimensional schematic diagram of .

[0022] Figure 3 It is a three-dimensional schematic diagram of the tire body of the present invention forming a tire upright rotating state on a tire driving device.

[0023] Figure 4 yes Figure 3 A partially enlarged side view schematic diagram of the plan view.

[0024] Figure 5 It is a schematic plan view of a front cross section of pouring a fluid PU material in an upright rotating state of the tire of the present invention.

[0025] Figure 6 It is a schematic plan view of a front cross section of a diffused fluid-like PU material in an upright rotation state of the tire of the present invention.

[0026] Figure 7 It is a schematic plan view of a front cross section of the fluid PU material of the present invention solidified on the inner top wall of the inner surface of the tire.

[0027] Figure 8 It is a schematic plan view of a front cross section of a tire according to the present invention in which a leakage prevention device is further provided on the inner surface thereof.

[0028] Fig. 9 It is a schematic plan view of a front cross section of the second embodiment and the third embodiment of the present invention.

[0029] Fig.10 It is a three-dimensional schematic diagram of a noise reduction layer obtained by cutting a long continuous noise reduction belt of the present invention into a long strip-shaped structure.

[0030] Fig.11 It is a schematic plan exploded view of a partial front view section of a noise reduction layer in the second embodiment of the present invention adhered to the inner top wall through an adhesive unit.

[0031] Fig.12 2 is a three-dimensional exploded schematic diagram showing that the noise reduction layer in the third embodiment of the present invention is adhered to the inner top wall through an adhesive unit.

[0032] Fig.13 1 is a schematic plan view of a front cross-section of a noise reduction layer in a third embodiment of the present invention adhered to the inner top wall through an adhesive unit.

[0033] Description of Figure Numbers:

[0034] 1-noise-reducing tire; 1a-tire upright rotation state; 10-tire body; 11-hollow space; 20-tire contact surface; 30-tire inner surface; 31-inner top wall; 32-inner side wall; 33-roughened surface; 40-noise-reducing layer; 40a-fluid PU material; 40b-long continuous noise-reducing belt; 2-tire driving device; 2a-roller group; 2b-control unit; 3-fluid PU material pouring device; 3a-pouring head; 3b-stirring container; 3c-first dose container; 3d-second dose container; 3e-control unit; 4-leakage prevention device. DETAILED DESCRIPTION

[0035] The structure and technical features of the present invention are described in detail as follows with reference to the accompanying drawings, wherein the drawings are only used to illustrate the structural relationship and related functions of the present invention. Therefore, the size of each element in the drawings is not drawn according to the actual scale and is not used to limit the present invention.

[0036] Please refer to Figure 1 and Fig. 9 The present invention provides a noise reduction tire 1, which includes a tire body 10, a tire contact surface 20, a tire inner surface 30 and a noise reduction layer 40.

[0037] The tire body 10 has a hollow space 11 (such as Figures 1 to 9 shown).

[0038] The tire contact surface 20 is located outside the tire body 10 (eg Figures 1 to 9 shown).

[0039] The tire inner surface 30 is located inside the tire body 10 relative to the tire contact surface 20, and the tire inner surface 30 includes an inner top wall 31 and two inner side walls 32 located on both sides of the inner top wall 31 (such as Figure 1 , Figures 5 to 9 shown).

[0040] The noise reduction layer 40 is a one-piece non-foamed body or one-piece foamed body (such as a one-piece foamed body) formed by solidifying a fluid PU material 40a with uniform or uneven thickness. Figure 7 and Figure 8As shown); wherein when the noise reduction layer 40 is an integrally formed non-foamed body, the thickness of the noise reduction layer 40 is 1 mm to 100 mm but not limited; wherein when the noise reduction layer 40 is an integrally formed foamed body, the thickness of the noise reduction layer 40 is 0.5 mm to 50 mm but not limited; wherein the temperature of the fluid-like PU material 40a is at 150°C but not limited; wherein the fluid-like PU material 40a is dried between 10°C and 80°C to form the noise reduction layer 40, but not limited; wherein the time for the fluid-like PU material 40a to dry and form the noise reduction layer 40 is 30 minutes but not limited; wherein the density of the noise reduction layer 40 is 300 to 2000 kg per cubic meter, but not limited; wherein the noise reduction layer 40 is a soft body or a semi-hard body, but not limited; wherein when the noise reduction layer 40 is a semi-hard body, the hardness of the noise reduction layer 40 is 15 to 98° Shore A, but not limited.

[0041] When the noise reduction layer 40 is composed of a non-foamed body, the fluid PU material 40a forming the noise reduction layer 40 is further composed of tri-functional polyether polyol, graft tri-functional polyether polyol, di-functional polyether polyol, isocyanate, filler, anti-settling agent, dehydrating agent and catalyst, but not limited thereto; wherein when the noise reduction layer 40 is composed of a foamed body, the fluid PU material 40a forming the noise reduction layer 40 is further composed of tri-functional polyether polyol, graft tri-functional polyether polyol, di-functional polyether polyol, isocyanate, filler, anti-settling agent, foaming agent, dehydrating agent and catalyst, but not limited thereto.

[0042] The dehydrating agent added in the process of forming the noise reduction layer 40 is further 0.1wt% to 10wt%, but not limited; wherein the filler comprises calcium carbonate, calcium silicate, calcium sulfate, barium sulfate, quartz powder, iron oxide, plastic powder, rubber powder, fiber powder, fiber recycling materials or various inorganic materials; wherein the catalyst comprises various organic metal compounds or various amine compounds; wherein the dehydrating agent comprises molecular sieve, zeolite, monofunctional isocyanate, or chemical substances that react with water; wherein the isocyanate comprises toluene di-isocyanate, toluene di-isocyanate hydride, toluene di-isocyanate prepolymer, di-phenyl methylene di-isocyanate, di-phenyl methylene di-isocyanate hydride, di-phenyl methylene di-isocyanate prepolymer, hexa-methylene isocyanate Di-isocyanate), a prepolymer of hexamethyl isocyanate, isophorone diisocyanate (Iso-phorone Di-isocyanate) or a prepolymer of isophorone diisocyanate, but not limited.

[0043] The fluid PU material 40a forming the noise reduction layer 40 is further composed of 0.1wt% to 60wt% of tri-functional polyether polyol, 0.1wt% to 60wt% of graft tri-functional polyether polyol, 0.1wt% to 50wt% of di-functional polyether polyol, 3 to 35wt% of isocyanate, 0.1wt% to 60wt% of filler, 0.1wt% to 5wt% of anti-settling agent, 0.1wt% to 1wt% of foaming agent, 0.1wt% to 3wt% of dehydrating agent and 0.1wt% to 2wt% of catalyst, and the sum of the above components is 100wt%, but not limited; wherein the fluid PU material 40a forming the noise reduction layer 40 is further composed of tri-functional polyether polyol (Tri-functional Polyether Polyol) The present invention is characterized in that the present invention comprises 8.8wt% of polyol, 12wt% of graft tri-functional polyether polyol, 24wt% of di-functional polyether polyol, 20wt% of isocyanate, 32wt% of filler, 0.8wt% of anti-settling agent, 0.24wt% of catalyst and 2.16wt% of dehydrating agent, and the sum of the above components is 100wt%, but the total is not limited.

[0044] According to the different types and manufacturing processes of the noise reduction layer 40 of the present invention, the noise reduction tire 1 of the present invention can at least have the first embodiment (such as Figure 1 As shown), the second embodiment (as shown Fig. 9 ) and the third embodiment (as shown Fig. 9 The tire body 10, the tire contact surface 20 and the tire inner surface 30 are substantially the same in structure or technical features in the first embodiment to the third embodiment. Therefore, the differences between the noise reduction layer 40 in the first embodiment, the second embodiment and the third embodiment of the present invention are described in detail below:

[0045] In the first embodiment of the present invention, the noise reduction layer 40 is laid on the inner top wall 31 of the inner surface 30 of the tire in an annular manner. Figure 2 As shown; wherein the manufacturing method of the noise reduction tire 1 (first embodiment) comprises the following steps:

[0046] Step S1: Provide a tire driving device 2 (such as Figure 3 and Figure 4 ), for driving (as shown Figure 3 and Figure 4 The tire body 10 is upright and rotated at a controlled timing or a constant speed (as shown in the direction of arrow B in FIG. Figure 3 and Figure 4 As shown in the direction of arrow C in the figure, a tire is formed in an upright rotation state 1a. Figures 3 to 6 As shown; wherein the tire body 10 is able to stably remain upright due to its own weight; wherein the tire driving device 2 further includes a roller set 2a and a control unit 2b but is not limited (such as Figure 3 As shown in FIG. 2 , the idler wheel in the roller assembly 2a is driven by the driving wheel to rotate, thereby driving the tire body 10 to rotate (as shown in FIG. 2 ). Figure 3 and Figure 4 The control unit 2b is capable of controlling the rotation time or rotation speed of the roller assembly 2a; wherein the cooperation between the roller assembly 2a and the control unit 2b is a common existing technology and will not be described in detail here.

[0047] Step S2: Provide a fluid PU material casting device 3 (such as Figure 3 The fluid PU material pouring device 3 is provided with a pouring head 3a, and the pouring head 3a is used to be placed in a hollow space 11 of the tire body 10 (as shown in FIG. Figure 3 As shown), a fluid PU material 40a is poured downwardly (as shown) through the pouring head 3a. Figures 3 to 6 As shown in the direction of arrow A in the figure, the tire is poured onto an inner top wall 31 of an inner surface 30 of the tire body 10 (as shown in the direction of arrow A in the figure). Figure 5 and Figure 6 As shown); wherein the fluid PU material casting device 3 further comprises a stirring container 3b, a first dose container 3c, a second dose container 3d and a control unit 3e, but is not limited to (such as Figure 3 As shown), the mixing container 3b is used to contain the first dose provided by the first dose container 3c and the second dose provided by the second dose container 3d, and stir to form the fluid PU material 40a. The control unit 3e is capable of controlling the pouring time, pouring speed or pouring amount of the pouring head 3a.

[0048] Step S3: Provide the tire body 10 and make the tire body 10 form the tire upright rotation state 1a on the tire driving device 2 (such as Figure 3 and Figure 4 shown).

[0049] Step S4: Perform a fluid PU material pouring operation, which is to use the pouring head 3a to pour the fluid PU material 40a onto the inner top wall 31 of the tire inner surface 30 (such as Figure 5 and Figure 6As shown in FIG. 1 , when the pouring head 3a pours and lays at least one ring of the fluid PU material 40a on the inner top wall 31 of the inner surface 30 of the tire, the pouring operation of the fluid PU material is completed.

[0050] Step S5: Perform a fluid PU material diffusion operation, which is to diffuse on the inner top wall 31 of the inner surface 30 of the tire through the centrifugal force generated by the rotation of the tire body 10 (such as Figure 6 The area occupied by the fluid PU material 40a (as shown by the arrow D in the figure) Figure 6 When the fluid PU material 40a is fully diffused, the diffusion operation of the fluid PU material is completed; when the fluid PU material 40a provides a larger amount of material or the centrifugal force generated by the rotation of the tire body 10 is larger, the fluid PU material 40a will further diffuse from the inner top wall 31 to the two inner side walls 32 on both sides close to the edge of the inner top wall 31, but it is not limited (such as Figure 7 shown).

[0051] Step S6: The fluid PU material 40a is solidified on the inner top wall 31 of the tire inner surface 30 to form a noise reduction layer 40 (such as a noise reduction layer 40 of a one-piece non-foamed body or a one-piece foamed body) with uniform or uneven thickness. Figure 7 As shown), a noise reduction tire 1 is completed (as shown Figure 1 When the fluid PU material 40a provides a larger amount of material or the centrifugal force generated by the rotation of the tire body 10 is larger, the range of the noise reduction layer 40 further covers the two inner side walls 32 on both sides of the inner top wall 31 close to the edge of the inner top wall 31, but is not limited (such as Figure 7 shown).

[0052] Please refer to Figure 1 and Figure 7 Before step S3, the inner top wall 31 of the tire inner surface 30 in the tire body 10 is further roughened so that the inner top wall 31 is formed into a roughened surface 33 for increasing the bonding strength of the noise reduction layer 40 on the inner top wall 31.

[0053] Please refer to Figure 8 Before step S3, a leak-proof device 4 may be further provided on the two inner side walls 32 of the tire inner surface 30 in the tire body 10, but is not limited thereto, to prevent the fluid PU material 40a from flowing outward from the inner top wall 31 during the diffusion operation of the fluid PU material, and to make the fluid PU material 40a solidify only on the inner top wall 31 (e.g. Figure 8 shown).

[0054] In the second embodiment of the present invention, the noise reduction layer 40 is a long strip-shaped structure (such as Fig.10The noise reduction layer 40 is closely adhered to the inner top wall 31 of the inner surface 30 of the tire by an adhesive unit 50 (as shown in FIG. Fig. 9 and Fig.11 As shown), the adhesive unit 50 includes adhesive or tape but is not limited thereto; wherein the manufacturing method of the noise reduction tire 1 (second embodiment) includes the following steps:

[0055] Step S1: Provide a long continuous noise reduction belt 40b (such as Fig.10 As shown), the long continuous noise reduction belt 40b is an integrally formed non-foamed body or an integrally formed foamed body with uniform or uneven thickness solidified by a fluid PU material 40a.

[0056] Step S2: Provide a tire body 10 (such as Fig.11 shown).

[0057] Step S3: Cut the long continuous noise reduction belt 40b into long strip-shaped structures (such as Fig.10 A noise reduction layer 40 is provided.

[0058] Step S4: The noise reduction layer 40 is closely adhered to the inner top wall 31 of the inner surface 30 of the tire by an adhesive unit 50 (eg, Fig.11 As shown), a noise reduction tire 1 is completed (as shown Fig. 9 shown).

[0059] Please refer to Fig.11 Before step S2, the inner top wall 31 of the tire inner surface 30 in the tire body 10 is further roughened so that the inner top wall 31 is formed into a roughened surface 33 for increasing the bonding strength of the noise reduction layer 40 on the inner top wall 31.

[0060] In the third embodiment of the present invention, the noise reduction layer 40 is a ring-shaped structure (such as Fig.12 The noise reduction layer 40 is closely adhered to the inner top wall 31 of the inner surface 30 of the tire by an adhesive unit 50 (as shown in FIG. Fig. 9 , Fig.12 and Fig.13 As shown), the adhesive unit 50 includes adhesive or tape but is not limited thereto; wherein the manufacturing method of the noise reduction tire 1 (third embodiment) includes the following steps:

[0061] Step S1: Provide a noise reduction layer 40 (eg Fig.12 As shown), the noise reduction layer 40 is an integrally formed non-foamed body or an integrally formed foamed body with uniform or uneven thickness formed by solidifying a fluid PU material 40a.

[0062] Step S2: Provide a tire body 10 (such as Fig.12 and Fig.13 shown).

[0063] Step S3: The noise reduction layer 40 is closely adhered to an inner top wall 31 of an inner surface 30 of the tire body 10 by an adhesive unit 50 (eg, Fig. 9 , Fig.12 and Fig.13 As shown), a noise reduction tire 1 is completed (as shown Fig. 9 shown).

[0064] Please refer to Fig.13 Before step S2, the inner top wall 31 of the tire inner surface 30 in the tire body 10 is further roughened, but not limited to, so that the inner top wall 31 is formed into a roughened surface 33 for increasing the bonding strength of the noise reduction layer 40 on the inner top wall 31.

[0065] The noise reduction tire 1 of the present invention has the following advantages compared with the existing noise reduction tires:

[0066] (1) The noise reduction layer 40 of the present invention is a thin layer structure that is laid in a ring shape on the inner top wall 31 of the inner surface 30 of the tire in the tire body 10. It is different from the prior art disclosed in U.S. Pat. No. 11,446,888 B2 that uses a complex structure design body similar to an air cushion as a noise reduction structure (noise reduction layer). It can effectively solve the problem of complicated process in the prior art and help reduce the production cost at the manufacturing end.

[0067] (2) The noise reduction layer 40 of the present invention is an integrally formed body of the inner top wall 31 of the inner surface 30 of the tire laid in a ring shape in the tire body 10. This is different from the prior art disclosed in U.S. Pat. No. 10,315,468 B2, which uses noise reduction strips that are not connected at the head and tail as noise reduction structures (noise reduction layers) to achieve the purpose of noise reduction. This can effectively solve the problem of the noise reduction structure not being tightly fitted in the prior art, and help to increase the market competitiveness of the product.

[0068] (3) The noise reduction tire 1 of the present invention only uses the noise reduction layer 40 as a single structure to achieve the purpose of noise reduction, which is different from the prior art disclosed in U.S. Patent No. 10,259,271B2 which combines two different types of structures to achieve the purpose of noise reduction. This can effectively solve the problem of complicated process in the prior art and help reduce the production cost at the manufacturing end.

[0069] (4) The present invention mainly relates to the noise reduction layer 40 (solidified by the fluid PU material 40a) formed integrally with the inner top wall 31 of the inner surface 30 of the tire within the tire body 10. This is different from the prior art disclosed in U.S. Pat. No. 9,517,661B2, which uses a fiber-shaped material with a risk of falling off, composed of a combination of polypropylene fiber, fiber and mineral filler, to be laid on the inner surface of the tire. This can effectively solve the problem of the noise reduction structure not fitting tightly enough in the prior art, and helps to increase the market competitiveness of the product.

[0070] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. A person skilled in the art will understand that many changes, modifications and even equivalent changes may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. A noise reduction tire, characterized in that: Include: A tire body having a hollow space for accommodating a wheel frame; A tire contact patch located outside the tire body; A tire inner surface, which is located inside the tire body relative to the tire contact surface, and the tire inner surface includes an inner top wall and two inner side walls located on both sides of the inner top wall; and A noise reduction layer is laid in a ring shape on the inner top wall of the inner surface of the tire, and the noise reduction layer is a one-piece non-foamed body or one-piece foamed body with uniform or uneven thickness solidified from a fluid PU material; The manufacturing method of the noise reduction tire comprises the following steps: Step S1: providing a tire driving device for driving a tire body to rotate upright with a controlled timing or a constant speed to form a tire upright rotating state; Step S2: providing a fluid PU material pouring device, wherein the fluid PU material pouring device is provided with a pouring head, and the pouring head is used to be placed in a hollow space of the tire body, so as to pour a fluid PU material downward onto an inner top wall of an inner surface of the tire inside the tire body through the pouring head; Step S3: providing the tire body, and making the tire body form an upright rotation state on the tire driving device; Step S4: performing a fluid PU material pouring operation, which is to use the pouring head to pour the fluid PU material onto the inner top wall of the inner surface of the tire. When the pouring head pours and lays at least one ring of the fluid PU material on the inner top wall of the inner surface of the tire, the fluid PU material pouring operation is completed; Step S5: performing a fluid PU material diffusion operation, which is to diffuse the area occupied by the fluid PU material on the inner top wall of the inner surface of the tire through the centrifugal force generated by the rotation of the tire body. When the fluid PU material is completely diffused, the fluid PU material diffusion operation is completed; and Step S6: solidify the fluid PU material on the inner top wall of the inner surface of the tire to form a noise reduction layer of an integrally formed non-foamed body or an integrally formed foamed body with uniform or uneven thickness, thereby completing a noise reduction tire.

2. The noise reduction tire according to claim 1, characterized in that: When the noise reduction layer is an integrally formed non-foamed body, the thickness of the noise reduction layer is 1 mm to 100 mm; when the noise reduction layer is an integrally formed foamed body, the thickness of the noise reduction layer is 0.5 mm to 50 mm.

3. The noise reduction tire according to claim 1, characterized in that: When the noise reduction layer is composed of a non-foamed body, the fluid PU material forming the noise reduction layer is further composed of tri-functional polyether polyol, graft tri-functional polyether polyol, di-functional polyether polyol, isocyanate, filler, anti-settling agent, dehydrating agent and catalyst; wherein when the noise reduction layer is composed of a foamed body, the fluid PU material forming the noise reduction layer is further composed of tri-functional polyether polyol, graft tri-functional polyether polyol, di-functional polyether polyol, isocyanate, filler, anti-settling agent, foaming agent, dehydrating agent and catalyst.

4. The noise reduction tire according to claim 3, characterized in that: The fluid PU material forming the noise reduction layer is composed of 0.1wt% to 60wt% of tri-functional polyether polyol, 0.1wt% to 60wt% of graft tri-functional polyether polyol, 0.1wt% to 50wt% of di-functional polyether polyol, 3 to 35wt% of isocyanate, 0.1wt% to 60wt% of filler, 0.1wt% to 5wt% of anti-settling agent, 0.1wt% to 1wt% of foaming agent, 0.1wt% to 3wt% of dehydrating agent and 0.1wt% to 2wt% of catalyst, and the sum of the above components is 100wt%.

5. The noise reduction tire according to claim 3, characterized in that: The fluid PU material forming the noise reduction layer is composed of 8.8wt% of tri-functional polyether polyol, 12wt% of graft tri-functional polyether polyol, 24wt% of di-functional polyether polyol, 20wt% of isocyanate, 32wt% of filler, 0.8wt% of anti-settling agent, 0.24wt% of catalyst and 2.16wt% of dehydrating agent, and the sum of the above components is 100wt%.

6. The noise reduction tire according to claim 1, characterized in that: Before step S3, the inner top wall of the inner surface of the tire in the tire body is roughened so that the inner top wall is formed into a roughened surface to increase the bonding strength of the noise reduction layer on the inner top wall.

7. A noise reduction tire, characterized in that: Include: A tire body having a hollow space for accommodating a wheel frame; A tire contact patch located outside the tire body; A tire inner surface, which is located inside the tire body relative to the tire contact surface, and the tire inner surface includes an inner top wall and two inner side walls located on both sides of the inner top wall; and A noise reduction layer, which is a long strip-shaped structure, the noise reduction layer is closely adhered to the inner top wall of the inner surface of the tire in a ring shape through an adhesive unit, and the noise reduction layer is a one-piece non-foamed body or one-piece foamed body with uniform or uneven thickness solidified by a fluid PU material; The manufacturing method of the noise reduction tire comprises the following steps: Step S1: providing a long continuous noise reduction belt, wherein the long continuous noise reduction belt is an integrally formed non-foamed body or an integrally formed foamed body with uniform or uneven thickness formed by solidifying a fluid PU material; Step S2: providing a tire body; Step S3: cutting the long continuous noise reduction belt into a noise reduction layer of a long strip structure according to the length of a ring of an inner top wall of an inner surface of the tire in the tire body; and Step S4: The noise reduction layer is closely adhered to the inner top wall of the inner surface of the tire through an adhesive unit, thereby completing a noise reduction tire.

8. The noise reduction tire according to claim 7, characterized in that: When the noise reduction layer is an integrally formed non-foamed body, the thickness of the noise reduction layer is 1 mm to 100 mm; when the noise reduction layer is an integrally formed foamed body, the thickness of the noise reduction layer is 0.5 mm to 50 mm.

9. The noise reduction tire according to claim 7, characterized in that: When the noise reduction layer is composed of a non-foamed body, the fluid PU material forming the noise reduction layer is further composed of tri-functional polyether polyol, graft tri-functional polyether polyol, di-functional polyether polyol, isocyanate, filler, anti-settling agent, dehydrating agent and catalyst; wherein when the noise reduction layer is composed of a foamed body, the fluid PU material forming the noise reduction layer is further composed of tri-functional polyether polyol, graft tri-functional polyether polyol, di-functional polyether polyol, isocyanate, filler, anti-settling agent, foaming agent, dehydrating agent and catalyst.

10. The noise reduction tire according to claim 9, characterized in that: The fluid PU material forming the noise reduction layer is composed of 0.1wt% to 60wt% of tri-functional polyether polyol, 0.1wt% to 60wt% of graft tri-functional polyether polyol, 0.1wt% to 50wt% of di-functional polyether polyol, 3 to 35wt% of isocyanate, 0.1wt% to 60wt% of filler, 0.1wt% to 5wt% of anti-settling agent, 0.1wt% to 1wt% of foaming agent, 0.1wt% to 3wt% of dehydrating agent and 0.1wt% to 2wt% of catalyst, and the sum of the above components is 100wt%.

11. The noise reduction tire according to claim 9, characterized in that: The fluid PU material forming the noise reduction layer is composed of 8.8wt% of tri-functional polyether polyol, 12wt% of graft tri-functional polyether polyol, 24wt% of di-functional polyether polyol, 20wt% of isocyanate, 32wt% of filler, 0.8wt% of anti-settling agent, 0.24wt% of catalyst and 2.16wt% of dehydrating agent, and the sum of the above components is 100wt%.

12. The noise reduction tire according to claim 7, characterized in that: Before step S2, the inner top wall of the inner surface of the tire in the tire body is roughened so that the inner top wall is formed into a roughened surface for increasing the bonding strength of the noise reduction layer on the inner top wall.

13. A noise reduction tire, characterized in that: Include: A tire body having a hollow space for accommodating a wheel frame; A tire contact patch located outside the tire body; A tire inner surface, which is located inside the tire body relative to the tire contact surface, and the tire inner surface includes an inner top wall and two inner side walls located on both sides of the inner top wall; and A noise reduction layer, which is an annular structure, the noise reduction layer is closely adhered to the inner top wall of the inner surface of the tire in an annular manner through an adhesive unit, and the noise reduction layer is a one-piece non-foamed body or an one-piece foamed body with uniform or uneven thickness solidified by a fluid PU material; The manufacturing method of the noise reduction tire comprises the following steps: Step S1: providing a noise reduction layer in the form of a ring-shaped structure, wherein the noise reduction layer is an integrally formed non-foamed body or an integrally formed foamed body with uniform or uneven thickness formed by solidifying a fluid PU material; Step S2: providing a tire body; and Step S3: The noise reduction layer is closely adhered to an inner top wall of an inner surface of the tire in the tire body by an adhesive unit, thereby completing a noise reduction tire.

14. The noise reduction tire according to claim 13, characterized in that: When the noise reduction layer is an integrally formed non-foamed body, the thickness of the noise reduction layer is 1 mm to 100 mm; when the noise reduction layer is an integrally formed foamed body, the thickness of the noise reduction layer is 0.5 mm to 50 mm.

15. The noise reduction tire according to claim 13, characterized in that: When the noise reduction layer is composed of a non-foamed body, the fluid PU material forming the noise reduction layer is further composed of tri-functional polyether polyol, graft tri-functional polyether polyol, di-functional polyether polyol, isocyanate, filler, anti-settling agent, dehydrating agent and catalyst; wherein when the noise reduction layer is composed of a foamed body, the fluid PU material forming the noise reduction layer is further composed of tri-functional polyether polyol, graft tri-functional polyether polyol, di-functional polyether polyol, isocyanate, filler, anti-settling agent, foaming agent, dehydrating agent and catalyst.

16. The noise reduction tire according to claim 15, characterized in that: The fluid PU material forming the noise reduction layer is composed of 0.1wt% to 60wt% of tri-functional polyether polyol, 0.1wt% to 60wt% of graft tri-functional polyether polyol, 0.1wt% to 50wt% of di-functional polyether polyol, 3 to 35wt% of isocyanate, 0.1wt% to 60wt% of filler, 0.1wt% to 5wt% of anti-settling agent, 0.1wt% to 1wt% of foaming agent, 0.1wt% to 3wt% of dehydrating agent and 0.1wt% to 2wt% of catalyst, and the sum of the above components is 100wt%.

17. The noise reduction tire according to claim 15, characterized in that: The fluid PU material forming the noise reduction layer is composed of 8.8wt% of tri-functional polyether polyol, 12wt% of graft tri-functional polyether polyol, 24wt% of di-functional polyether polyol, 20wt% of isocyanate, 32wt% of filler, 0.8wt% of anti-settling agent, 0.24wt% of catalyst and 2.16wt% of dehydrating agent, and the sum of the above components is 100wt%.

18. The noise reduction tire according to claim 13, characterized in that: Before step S2, the inner top wall of the inner surface of the tire in the tire body is roughened so that the inner top wall is formed into a roughened surface for increasing the bonding strength of the noise reduction layer on the inner top wall.

Images