Air cushion shoe sole with flowing air chamber

Abstract

The utility model belongs to the technical field of shoe soles, and particularly relates to an air cushion shoe sole with a flowing air chamber, which comprises a midsole and an outsole, a plurality of matching holes are arranged at the bottom of the midsole, a plurality of U-shaped grooves are arranged among the matching holes, and anti-skidding bumps and air cushion bumps are arranged at the bottom of the outsole. The insole and the outsole are matched to form an air chamber, the matching holes are hemispherical, and the air cushion protruding blocks are higher than the anti-skid protruding blocks. Automatic adjustment of air pressure between the air chambers is achieved through the communicating grooves, overlarge local pressure intensity is avoided, foot impact peak pressure is reduced, and joint loads are relieved.

Description

Technical Field

[0001] This utility model belongs to the field of shoe sole technology, specifically relating to an air-cushioned shoe sole with a flowing air chamber and its manufacturing process. Background Technology

[0002] As people's living standards improve, their requirements for shoes have gradually shifted from durability and wear resistance to aesthetics and comfort. This has led to the emergence of air-cushioned shoes, which basically place the air cushion at the bottom of the sole to achieve shock absorption and cushioning, thus making the shoes comfortable.

[0003] Currently, most traditional air-cushioned shoes use independent air cushions in areas such as the forefoot or heel. In some sports, such as running, when the heel strikes the ground, the soles of these shoes are prone to excessive local pressure, excessive deformation, or even collapse, thus reducing the cushioning effect. Utility Model Content

[0004] This utility model discloses an air-cushioned shoe sole with a flowing air chamber, which mainly solves the problem that the cushioning effect of traditional air cushions is poor under special circumstances.

[0005] To achieve the aforementioned objective, this utility model provides an air-cushioned shoe sole with a flowing air chamber, comprising a midsole and an outsole. The bottom of the midsole has several mating holes, and several U-shaped grooves are provided between the mating holes. The bottom of the outsole is provided with anti-slip protrusions and air-cushion protrusions. The midsole and the outsole cooperate to form an air chamber.

[0006] Preferably, the mating hole is hemispherical.

[0007] Preferably, the height of the air cushion bump is higher than the height of the anti-slip bump.

[0008] Preferably, the air cushion protrusion is hemispherical, and an air cavity is formed inside the air cushion protrusion, and the air cavities are connected to each other through a connecting groove.

[0009] Preferably, a sealing ring is provided at the top of the mating hole.

[0010] Preferably, the sealing ring is annular, and the outer diameter of the sealing ring is equal to the inner diameter of the air cushion protrusion. After assembly, the sealing ring is located between the mating hole and the positioning hole, thereby playing the role of interference fit sealing.

[0011] Preferably, a positioning hole is provided at the heel of the bottom of the insole, and a positioning protrusion is provided at the heel of the top of the outsole. The positioning protrusion is used to match the positioning hole to facilitate assembly.

[0012] Preferably, the depth of the connecting groove is 1mm-2mm and the width of the connecting groove is 3mm-5mm.

[0013] Preferably, a process for preparing the air-cushioned shoe sole with the flowing air chamber is also provided, comprising the following steps:

[0014] S1: Outsole preparation:

[0015] Rubber material is added to an open mill and plasticized to obtain a mixture;

[0016] The mixture, silica, vulcanizing agent, and auxiliary materials are added to a mixer for secondary mixing to obtain a composite material. The composite material is then heated into a mold through an injection molding machine, vulcanized, and foamed to obtain the outsole.

[0017] S2: Sealing ring preparation:

[0018] Liquid silica gel, bisphenol AF, benzyltriphenylphosphine chloride, carbon black, and silica are added to a rubber mixing mill and plasticized to obtain a composite material. The material is then extruded into a preform, which is injected into a mold and cooled to obtain a sealing ring.

[0019] S3: Midsole Preparation:

[0020] EVA / supercritical foamed TPU particles are added to a 3D motion mixer to achieve uniform particle dispersion. The resulting dispersed material is granulated to obtain granules. The granules are then injection molded in one step to obtain a preform. After the preform is left to stand, it undergoes supercritical foaming to obtain a foamed material. A sealing ring is pre-placed in the midsole mold, and the foamed material is then injected into the mold. A silicone micro-valve is embedded in the midsole mold, and the material is cooled to obtain a shrinkage-resistant, ultra-lightweight, soft, and elastic supercritical foamed midsole.

[0021] S4: Sole Assembly:

[0022] Align the midsole and outsole using positioning holes and protrusions;

[0023] Use a two-component polyurethane adhesive and apply it evenly along the joint.

[0024] The gap is eliminated by applying a pressure of 0.5MPa-0.8MPa through a vacuum pressing device and held for 30 seconds. After assembly, Ar gas with a purity of 99.99% is injected through a micro-valve. After the gas injection is completed, the valve port is instantly sealed with a 350℃ metal tip, and the sealing strength is ≥8MPa.

[0025] Gradient curing: 40℃ / 1h → 60℃ / 2h → room temperature 24h;

[0026] Remove excess glue by sanding and washing with water to remove residue.

[0027] Preferably, the sole assembly step further includes quality inspection, which includes bending test and water immersion test.

[0028] The technical solution provided by this utility model has at least the following technical effects:

[0029] 1. Dynamic pressure balancing:

[0030] Automatic pressure regulation between air chambers is achieved through connecting channels, which avoids excessive local pressure, reduces peak impact pressure on the foot, and alleviates joint load.

[0031] 2. Energy feedback optimization:

[0032] Motion energy is efficiently transferred between the connecting air chambers, improving vertical rebound rate, reducing lateral energy loss, and significantly improving motion economy.

[0033] 3. Multi-scene adaptive:

[0034] The air pressure distribution is dynamically adjusted according to the gait: pre-pressurization at the initial contact stage, pressure coupling during the full support stage, and coordinated energy storage during the push-off stage, adapting to the needs of different sports such as running and basketball. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the base structure of Embodiment 1 of this utility model;

[0037] Figure 2 This is a schematic diagram of the structure of the middle bottom in Embodiment 1 of this utility model;

[0038] Figure 3 This is a partially enlarged cross-sectional view of the midsole fitting hole in Embodiment 1 of this utility model;

[0039] Figure 4 This is a structural schematic diagram of the base of Embodiment 1 of this utility model from another angle;

[0040] Figure 5 This is a schematic diagram of the base structure of Embodiment 3 of this utility model;

[0041] Figure 6 This is a process step diagram of Embodiment 1 of this utility model;

[0042] Figure 7 This is a flowchart of the bending test of Embodiment 1 of this utility model;

[0043] Key reference numerals: 1. Outsole; 2. Air cushion protrusion; 3. Connecting protrusion; 4. Mating hole; 5. Sealing ring; 6. Connecting groove; 7. U-groove; 8. Positioning hole; 9. Positioning protrusion; 10. Midsole; 11. Forefoot area; 12. Heel area. Detailed Implementation

[0044] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown 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 embodiments of the present invention, and should not be construed as limiting the present invention.

[0045] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] Please refer to Figures 1-4 This utility model provides an air-cushioned shoe sole with a flowing air chamber and its manufacturing process, which mainly solves the problem that the cushioning effect of traditional air cushions is poor under special circumstances.

[0048] To achieve the aforementioned objective, this utility model provides an air-cushioned shoe sole with a flowing air chamber, comprising a midsole 10 and an outsole 1. The bottom of the midsole 10 has several mating holes 4, and several U-shaped grooves 7 are provided between the mating holes 4, connecting them. The bottom of the outsole 1 has anti-slip protrusions and air-cushion protrusions 2. The midsole 10 and the outsole 1 cooperate to form a connected air chamber. The mating holes 4 are hemispherical, and the height of the air-cushion protrusions 2 is higher than the height of the anti-slip protrusions. The air-cushion protrusions 2 are hemispherical. The air cushion protrusion 2 has an air cavity inside, and the air cavities are connected by a connecting groove 6. A sealing ring 5 is provided on the top of the mating hole 4. The sealing ring 5 is annular and its outer diameter is equal to the inner diameter of the air cushion protrusion 2. A positioning hole 8 is provided at the heel of the bottom of the insole 10. A positioning protrusion is provided at the heel of the top of the outsole 1. The depth of the connecting groove 6 is 1 mm and the width of the connecting groove 6 is 4 mm. A barrier layer is provided on the surface of the air cushion protrusion 2. The barrier layer is made of HDPE.

[0049] In this embodiment, the air cushion protrusions 2 are distributed on the outside of the positioning protrusions.

[0050] Please refer to Figure 6 This embodiment also provides a process for preparing the air-cushioned shoe sole with the flow chamber, including the following steps:

[0051] S1: Outsole 1 preparation:

[0052] Rubber material is added to an open mill and plasticized to obtain a mixture;

[0053] The mixture, silica, vulcanizing agent, and auxiliary materials are added to a mixer for secondary mixing to obtain a composite material. The composite material is then heated into a mold through an injection molding machine, vulcanized, and foamed to obtain the outsole 1.

[0054] S2: Preparation of sealing ring 5:

[0055] Liquid silica gel, bisphenol AF, benzyltriphenylphosphine chloride, carbon black, and silica are added to a rubber mixing mill and plasticized to obtain a composite material. The material is then extruded into a preform, which is injected into a mold and cooled to obtain a sealing ring 5.

[0056] S3: Midsole 10 Preparation:

[0057] EVA / supercritical foamed TPU particles are added to a 3D motion mixer to achieve uniform particle dispersion. The resulting dispersed material is granulated to obtain granules. The granules are then injection molded in one step to obtain a preform. After the preform is left to stand, it undergoes supercritical foaming to obtain a foamed material. A sealing ring 5 is pre-placed in the mold of the midsole 10. The foamed material is then injected into the mold, and a silicone micro-valve is embedded in the mold of the midsole 10. After cooling, an anti-shrinkage, ultra-lightweight, soft, and elastic supercritical foamed midsole 10 is obtained.

[0058] S4: Sole Assembly:

[0059] Align the middle sole 10 and the outer sole 1 using the positioning hole 8 and the positioning protrusion 9;

[0060] Use a two-component polyurethane adhesive and apply it evenly along the joint.

[0061] The gap is eliminated by applying a pressure of 0.5MPa-0.8MPa through a vacuum pressing device and held for 30 seconds. After assembly, Ar gas with a purity of 99.99% is injected through a micro-valve. After the gas injection is completed, the valve port is instantly sealed with a 350℃ metal tip (sealing strength ≥8MPa).

[0062] Gradient curing: 40℃ / 1h → 60℃ / 2h → room temperature 24h;

[0063] Remove excess glue by sanding and washing with water to remove residue.

[0064] Please refer to the following: Figure 7 The shoe sole assembly step also includes quality inspection, which includes a bending test. The specific operation steps are as follows:

[0065] 1. Sample preparation;

[0066] Cut the sole into a standard size of 70×45mm, and make a 2mm incision at the line of maximum bending stress using a cutting knife.

[0067] 2. Fix the sample:

[0068] Secure the sample to the fixture, ensuring the fold line is aligned with the fixture and the bending angle is 90°.

[0069] 3. Set parameters:

[0070] The bending frequency is set to 60 times / minute, and the number of tests is 50,000.

[0071] 4. Perform the test:

[0072] Start the equipment to simulate repeated bending and observe the crack propagation.

[0073] 5. Result Evaluation:

[0074] Use a magnifying glass to measure the length of the incision growth and compare it with the initial value to determine whether it is acceptable.

[0075] The equipment used in the test is existing technology, and will not be described in detail here.

[0076] According to another embodiment of the present invention:

[0077] In this embodiment, the filling gas adopts a negative pressure intake scheme, including the following steps:

[0078] 1. Positioning and alignment;

[0079] Ensure that the hemispherical holes and positioning protrusions / holes of the midsole and outsole are precisely aligned;

[0080] Mold improvement: Add vacuum adsorption holes (0.5-1mm in diameter, arrayed with a spacing of 20mm) to the hot press mold.

[0081] 2. Negative pressure adsorption;

[0082] Equipment configuration: Vacuum pump (ultimate vacuum -0.1MPa, pumping speed ≥10L / min);

[0083] High-temperature resistant sealing ring (silicone material, temperature resistant up to 150℃);

[0084] Vacuum tubing quick connector (with pressure sensor);

[0085] Operating procedures:

[0086] a. Close the mold and start the vacuum pump to evacuate the air to -0.05~-0.08MPa (maintain for 10-15 seconds);

[0087] b. The midsole and outsole fit together tightly under negative pressure, and the air in the air chamber is extracted;

[0088] c. Monitor the vacuum level in real time and lock the pressure once the set value is reached;

[0089] 3. Hot pressing bonding;

[0090] Process adjustment: Direct heating and pressurization while maintaining a vacuum state;

[0091] Parameter settings:

[0092] Temperature: 85-95℃;

[0093] Pressure: 6-7 kg / cm²;

[0094] Time: 25 seconds;

[0095] 4. Vacuum release, staged pressure relief:

[0096] a. First, slowly release to -0.02 MPa (takes 3 seconds);

[0097] b. Completely release the vacuum (takes 2 seconds);

[0098] c. Material rebound forms a stable low-pressure air chamber (internal pressure ≈ 0.6 atm);

[0099] 5. Secondary edge sealing, laser edge sealing:

[0100] 1064nm fiber laser;

[0101] Power 30W, scanning speed 200mm / s;

[0102] In this embodiment, the low-pressure environment keeps the air chamber wall in a "pre-stretched" state (similar to a balloon that is not fully inflated). When subjected to external impact, the air chamber has less compression resistance and a faster rebound speed.

[0103] The principle is as follows:

[0104] Pressure differential buffer:

[0105] When an external impact force compresses the air chamber, the low-pressure air inside is further compressed, and the increased air pressure absorbs energy. After the external force is removed, the material rebound and the recovery of air pressure together provide the rebound force.

[0106] Material synergy:

[0107] The low-pressure environment reduces the initial stiffness of the air chamber walls, making the sole more deformable (enhancing the initial soft feel). Material rebound provides the main energy feedback.

[0108] According to another embodiment of the present invention;

[0109] Please refer to Figure 5 ;

[0110] In this embodiment, the air chambers are divided into a forefoot area and a heel area. The forefoot area includes 7 air cushion protrusions 2, and the heel area includes 6 air cushion protrusions 2. In this embodiment, the air chambers in the forefoot area are interconnected.

[0111] This utility model has at least the following advantages:

[0112] 1. Dynamic pressure balancing:

[0113] Automatic pressure regulation between air chambers is achieved through the connecting groove 6, which avoids excessive local pressure, reduces peak impact pressure on the foot, and alleviates joint load.

[0114] 2. Energy feedback optimization:

[0115] Motion energy is efficiently transferred between the connecting air chambers, improving vertical rebound rate, reducing lateral energy loss, and significantly improving motion economy.

[0116] 3. Multi-scene adaptive:

[0117] The air pressure distribution is dynamically adjusted according to the gait: pre-pressurization at the initial contact stage, pressure coupling during the full support stage, and coordinated energy storage during the push-off stage, adapting to the needs of different sports such as running and basketball.

[0118] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air-cushioned shoe sole with a flowing air chamber, characterized in that: It includes a midsole (10) and an outsole (1). The bottom of the midsole (10) is provided with several mating holes (4) and several U-shaped grooves (7) are provided between the mating holes (4). The bottom of the outsole (1) is provided with anti-slip protrusions and air cushion protrusions (2). The midsole (10) and the outsole (1) cooperate to form an air chamber.

2. The air-cushioned shoe sole with a flowing air chamber according to claim 1, characterized in that: The mating hole (4) is hemispherical.

3. The air-cushioned shoe sole with a flowing air chamber according to claim 1, characterized in that: The height of the air cushion bump (2) is higher than the height of the anti-slip bump.

4. The air-cushioned shoe sole with a flowing air chamber according to claim 1, characterized in that: The air cushion protrusion (2) is hemispherical, and an air cavity is provided inside the air cushion protrusion (2). The air cavities are connected to each other through a connecting groove (6).

5. The air-cushioned shoe sole with a flowing air chamber according to claim 1, characterized in that: A sealing ring (5) is provided on the top of the mating hole (4).

6. The air-cushioned shoe sole with a flowing air chamber according to claim 5, characterized in that: The sealing ring (5) is circular, and the outer diameter of the sealing ring (5) is equal to the inner diameter of the air cushion protrusion (2).

7. The air-cushioned shoe sole with a flowing air chamber according to claim 1, characterized in that: The bottom of the midsole (10) has a positioning hole (8) at the heel, and the top of the outsole (1) has a positioning protrusion at the heel.

8. The air-cushioned shoe sole with a flowing air chamber according to claim 4, characterized in that: The depth of the connecting groove (6) is 1mm-2mm, and the width of the connecting groove (6) is 3mm-5mm.

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