A ventilation airbag and its preparation method and mold

Abstract

The present invention relates to a ventilation airbag and a preparation method and a mold thereof. The ventilation airbag comprises an airbag body, an air-containing cavity is arranged in the airbag body, a one-way inlet flow channel and a one-way outlet flow channel connected to the air-containing cavity are arranged at the front end of the airbag body, round balls are arranged in the inlet flow channel and the outlet flow channel respectively, the inlet and outlet flow channels comprise a pipe and a blocking ring arranged in the pipe with a smaller inner diameter than the pipe, a plurality of limiting points are raised on the inner wall of the flow channel, the blocking ring cooperates with the round ball to open or close the gas flow of the flow channel, the limiting point of the inlet flow channel restricts the round ball from falling into the air-containing cavity and keeps the flow channel ventilated, the blocking ring of the outlet flow channel cooperates with the round ball to open or close the gas flow of the outlet flow channel, and the limiting point of the outlet flow channel restricts the round ball from running out of the airbag and keeps the flow channel ventilated. The present invention has a simple structure, the inlet flow channel and the outlet flow channel are integrally formed in the airbag body, the round ball is moved between the blocking ring and the limiting point respectively to achieve the function of one-way air intake and one-way air outlet, and the overall structure is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of footwear, in particular to a ventilation airbag and a preparation method and a mold thereof. Background Art

[0002] When people walk, their feet bear the weight of the whole body and transfer this weight to the ground. The ground will also generate a reaction force to the feet, so we will feel sore feet after walking for a while. In order to solve this problem, shoe factories will add some ventilation airbags to the soles of shoes to increase the rebound force and achieve shock absorption, so as to improve the walking comfort of the wearer. At present, the airbags are made of TPU to form a hollow capsule. The capsule needs to be cut and then manually bonded to form an airbag shape. The capsule is cut out of a joint connected to the air cavity of the capsule; an air guide tube is inserted at the joint, and a one-way valve core is inserted at the end of the air guide tube. The airbag has many components, requires manual assembly, has a complex structure, and has high production costs. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a ventilation airbag with a simple structure, few components and simple assembly, and a preparation method and mold thereof.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a ventilation airbag, including an airbag body, an air containing cavity is provided in the airbag body, a one-way inlet flow channel and a one-way outlet flow channel connected to the air containing cavity are provided at the front end of the airbag body, the airbag body, the one-way inlet flow channel and the one-way outlet flow channel are integrally formed, a first round ball is provided in the inlet flow channel, an air inlet occlusion ring is provided between the first round ball and the air inlet, the inner diameter of the inlet flow channel is larger than the diameter of the first round ball, and the inner diameter of the air inlet occlusion ring is smaller than the diameter of the first round ball, a second round ball is provided in the outlet flow channel, an air outlet occlusion ring is provided between the second round ball and the outlet of the air containing cavity, the inner diameter of the outlet flow channel is larger than the diameter of the second round ball, and the inner diameter of the air outlet occlusion ring is smaller than the diameter of the second round ball.

[0005] Round balls are respectively arranged in the inlet and outlet channels. The inlet and outlet channels include a channel and a blocking ring arranged in the channel with a smaller inner diameter than the inner diameter of the channel. The inner wall of the channel protrudes with several limiting points. The blocking ring cooperates with the round ball to open or close the gas flow of the channel. The limiting point of the inlet channel restricts the round ball from falling into the air-containing cavity and keeps the channel ventilated. The blocking ring of the outlet channel cooperates with the round ball to open or close the gas flow of the outlet channel. The limiting point of the outlet channel restricts the round ball from running out of the airbag and keeps the channel ventilated. The inlet and outlet channels are integrally formed in the airbag body, and the round ball is used to move between the blocking ring and the limiting point to achieve the effect of one-way air intake and one-way air outlet, which simplifies the overall airbag structure and has better air tightness than traditional airbags.

[0006] Preferably, the inner wall surface of the inlet air channel is provided with a plurality of first limit points between the entrance of the air cavity and the first round bead, the first limit points protrude from the inner wall of the inlet air channel, and the distance between the top ends of the protrusions of the plurality of first limit points is smaller than the diameter of the first round bead, and the inner wall surface of the outlet air channel is provided with a plurality of second limit points between the air outlet and the second round bead, the second limit points protrude from the inner wall of the outlet air channel, and the distance between the top ends of the protrusions of the plurality of second limit points is smaller than the diameter of the second round bead.

[0007] The inlet and outlet flow channels are pipes with the same inner diameter. The diameters of the first and second round balls are smaller than the inner diameter of the pipes. The first and second limit points restrict the first and second round balls from sliding out of the flow channel while keeping the flow channel ventilated. The inlet and outlet blocking rings restrict the round balls from sliding out of the flow channel while blocking the flow channel.

[0008] Preferably, the air-containing inner cavity is filled with a breathable supporting filler.

[0009] Preferably, the airbag body is made of rubber.

[0010] A mold for manufacturing a ventilation airbag, the airbag mold comprises an upper mold, a middle plate, and a lower mold, the middle plate is arranged between the upper mold and the lower mold, the upper mold and the lower mold are arranged parallel to each other and closely fit on the upper and lower surfaces of the middle plate, the upper mold and the lower mold are each provided with at least one concave mold cavity, the upper and lower surfaces of the middle plate are provided with protruding upper mold cores and lower mold cores at positions corresponding to the concave mold cavity, the upper mold concave mold cavity is molded with the upper mold core of the middle plate to form an upper sheet cavity, the lower mold concave mold cavity is molded with the lower mold core of the middle plate to form a lower sheet cavity, the upper sheet cavity and the lower sheet cavity are provided with reserved grooves for inlet and outlet flow channels. A gentle slope is provided between the upper mold core and the concave mold cavity, and between the lower mold core and the concave mold cavity, and the gentle slope effectively reduces the wrinkling after the upper film and the lower film are connected.

[0011] Preferably, the airbag mold also includes an inlet flow channel mold core and an outlet flow channel mold core that cooperate with the reserved groove of the inlet flow channel. The inlet flow channel mold core and the outlet flow channel mold core are a round rod, and a blocking groove is provided on the round rod. A limiting hole is provided on one side of the blocking groove. After the upper mold and the lower mold are closed, the blocking groove forms a blocking ring in the flow channel, and the limiting hole forms a limiting point.

[0012] The present invention simplifies the airbag production process through the mold, the inlet air channel mold core and the outlet air channel mold core use the same mold core, the mold structure is more optimized, and the cost is further saved and the production efficiency is improved.

[0013] A method for preparing a ventilation airbag comprises the following steps:

[0014] Step 1: Preheating the mold: first, preset the vulcanization time on the vulcanizer to be 50s to 200s and the vulcanization temperature to be 150°C to 200°C, then, close the upper mold, the middle plate, and the lower mold to preheat, the preheating temperature is the preset temperature of the vulcanizer, and the preheating time is 40min to 3h;

[0015] Step 1: Preheating the mold: preheating the upper mold, the middle plate, and the lower mold;

[0016] Step 2: Load the rubber material and close the mold: After the mold temperature reaches the set value, separate the upper mold, middle plate and lower mold, put the lower rubber material (solid) into the concave mold cavity of the lower mold, and then place the middle plate on the lower mold so that the lower mold core of the middle plate is attached to the surface of the lower rubber material, and then put the upper rubber material (solid) on the mold core surface of the middle plate, and then cover the upper mold on the middle plate so that the upper cover concave mold cavity is attached to the surface of the upper rubber material. At this time, the material shape matches the concave mold cavity, which is convenient for the rubber material to fill the cavity;

[0017] Step 3: Vulcanization molding: Put the mold after mold closing in step 2 into the vulcanizer, start the vulcanizer to close the mold, heat the mold according to the preset vulcanization temperature of the vulcanizer, melt the upper rubber material and flow to the upper piece cavity, and form an airbag upper piece with a front end inlet and outlet channel reserved grooves and a hemispherical concave cavity in the middle in the upper piece cavity, melt the lower rubber material and flow to the lower piece cavity, and form an airbag lower piece with a front end inlet and outlet channel reserved grooves and a hemispherical concave cavity in the middle in the lower piece cavity;

[0018] Step 4: Open the mold: separate the upper mold from the lower mold and remove the middle plate, and put the breathable support material into the hemispherical concave cavity of the lower plate of the airbag;

[0019] Step 5: Place the inlet channel mold core and the outlet channel mold core into the inlet channel and the outlet channel reserved grooves, place the mold with the upper mold and the lower mold into the vulcanizer for pressurization and heating, hot-melt the edges of the airbag upper piece and the airbag lower piece, and remove the inlet channel mold core and the outlet channel mold core to form a basic airbag with the inlet channel and the outlet channel left;

[0020] Step 6: Insert two round beads into the inlet and outlet channels respectively, with the round beads of the inlet channel between the occluding ring and the air-containing cavity, and the round beads of the outlet channel between the occluding ring and the air outlet, to complete the preparation of the airbag.

[0021] The beneficial effects of the present invention are as follows: the airbag of the present invention adopts an integrally formed inlet and outlet flow channels, the inlet flow channel is composed of a perfect circular pipe with an inner diameter and a first round ball with a diameter smaller than the pipe, a limit point is provided between the round ball and the air-containing cavity, the limit point protrudes from the inner wall of the flow channel, the distance between the tops of several limit point protrusions is smaller than the round ball, the limit point restricts the round ball from sliding out of the flow channel while keeping the flow channel ventilated, a blocking ring is provided between the round ball and the air inlet, the inner diameter of the blocking ring is smaller than the round ball, the blocking ring restricts the round ball from sliding out of the flow channel while blocking the flow channel. The outlet flow channel is composed of a perfect circular pipe with an inner diameter and a second round ball with a diameter smaller than the pipe, a blocking ring is provided between the round ball and the air-containing cavity, the inner diameter of the blocking ring is smaller than the round ball, the blocking ring restricts the round ball from sliding out of the flow channel while blocking the flow channel, a limit point is provided between the round ball and the air outlet, the limit point protrudes from the inner wall of the flow channel, the distance between the tops of several limit point protrusions is smaller than the round ball, the limit point restricts the round ball from sliding out of the flow channel while keeping the flow channel ventilated. The present invention has a simple structure, in which an inlet airflow channel and an outlet airflow channel are integrally formed on the airbag body, and the round balls are moved between the blocking ring and the limit points to achieve the effects of one-way air intake and one-way air outlet, which not only ensures the control effect of the present invention on the airflow, but also simplifies the overall structure.

[0022] The airbag of the present invention can realize two modes. Mode 1: the airbag discharges sweat in the shoe to the outside of the shoe. When the inlet flow channel passes through the conduit, the air inlet of the airbag is set in the shoe. Since the inlet and outlet flow channels adopt a one-way design, the flow channel is opened and closed by a round ball. The inlet flow channel can only take in air, and the outlet flow channel can only exhaust air. When a person walks, the airbag is squeezed by the foot to compress and expand the airbag, which can discharge the moist sweat in the shoe to the outside of the shoe, keeping the foot dry and comfortable and avoiding shoe odor. Mode 2: the airbag introduces air outside the shoe into the shoe. When the inlet flow channel passes through the conduit, the air inlet is set outside the shoe. It uses the principle of human walking, and through the compression and expansion of the airbag, the outside air is gradually sucked into the shoe, thereby playing a role in ventilation and air exchange in the shoe.

[0023] The preparation process of the present invention is simple. First, a middle plate is arranged between the upper mold and the lower mold to form the upper plate and the lower plate of the airbag, and then the middle plate is pulled out, and the inlet and outlet channel mold cores are placed in the airway reserved grooves of the upper rubber skin and the lower rubber skin, so that the edges of the upper rubber skin and the lower rubber skin are bonded to obtain an integrally formed airbag with an inlet and outlet channel connected to the air cavity, and then the blocking round beads are respectively inserted into the first round bead cavity section and the second round bead cavity section. Since the flow channel is made of rubber material, the blocking round beads are easy to be inserted into the flow channel. The preparation is simple and the production efficiency is high. The disadvantage of the traditional airbag with many components is solved. The inlet and outlet flow channel integrally formed structure is adopted to avoid the one-way valve core of the existing airbag from being unable to achieve the ventilation effect due to loose assembly. In addition, the process of the present invention is simpler than the traditional airbag production process. The basic airbag is manufactured by a mold, and the manufacturing of the entire airbag is completed by inserting the round beads. The components are few and the cost is low, and the air tightness is better and the overall structure is more solid. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0025] Figure 2 It is a front cross-sectional view of the present invention.

[0026] Figure 3 yes Figure 2 AA cross-section diagram.

[0027] Figure 4 1 is a schematic structural diagram of an embodiment of an intake air duct.

[0028] Figure 5 1 is a schematic structural diagram of an embodiment of an outlet air duct.

[0029] Figure 6 It is the exploded structure diagram of the mold.

[0030] Figure 7 It is a three-dimensional structural diagram of the runner core.

[0031] Figure 8 1 is a schematic structural diagram of a second embodiment of the intake air duct.

[0032] Fig. 9 1 is a schematic structural diagram of a second embodiment of the outlet air duct.

[0033] Fig.10 It is a three-dimensional structural diagram of the second embodiment of the intake channel mold core.

[0034] Fig.11 It is a three-dimensional structural diagram of the second embodiment of the outlet flow channel mold core.

[0035] Explanation of reference numerals: 1. airbag body; 11. air inlet; 12. air outlet; 13. airbag upper plate; 14. airbag lower plate; 2. air-containing cavity; 21. filler; 22. inlet; 23. outlet; 3. air intake channel; 30. air intake blocking ring; 31. first air intake section; 311. air intake section; 312. air intake blocking section; 32. second air intake section; 321. first round ball cavity section; 322. first air-containing cavity connecting section; 323. first limiting point; 33. first interface; 34. first Round ball; 4. Outlet flow channel; 40. Outlet blocking ring; 41. First outlet section; 411. Outlet section; 412. Second round ball cavity section; 413. Second limiting point; 42. Second outlet section; 422. Second air cavity connecting section; 43. Second interface; 44. Second round ball; 5. Upper mold; 6. Middle plate; 61. Upper mold core; 7. Lower mold; 71. Concave mold cavity; 8. Inlet flow channel mold core; 81. First limiting hole; 82. Blocking groove; 9. Outlet flow channel mold core; 91. Second limiting hole. DETAILED DESCRIPTION

[0036] Embodiment 1

[0037] See also Figure 1-9 As shown, the present invention relates to a ventilation airbag, including an airbag body 1, which is made of rubber. The airbag body 1 includes an airbag upper sheet 13 and an airbag lower sheet 14. An air-containing cavity 2 is provided in the airbag body 1, and a breathable supporting filler 21, such as sponge, leaves, etc., is provided in the airbag cavity 2. An air inlet 11 and an air outlet 12 are provided at the front end of the airbag body 1. The air-containing cavity 2 has an inlet 22 and an outlet 23. A one-way inlet flow channel 3 communicating with the air-containing cavity 2 is provided between the air inlet 11 and the inlet 22 of the air-containing cavity 2, and a one-way outlet flow channel 4 communicating with the air-containing cavity 2 is provided between the air outlet 12 and the outlet 23 of the air-containing cavity 2. The airbag body 1, the one-way inlet flow channel 3 and the one-way outlet flow channel 4 are integrally formed. Traditional airbags are manually assembled with multiple components, while the present invention adopts an integrated The molding process simplifies the traditional airbag interface, one-way valve core and other components, optimizes the production process, improves production efficiency, and solves the problems of loose assembly of the existing airbag and the one-way valve core. The inlet flow channel 3 is provided with a first round ball 34, and an inlet closure ring 30 is provided between the first round ball 34 and the air inlet 11. The closure ring 30 is formed by rubber hot pressing through the groove provided on the flow channel mold core and the upper and lower molds. The inner diameter of the inlet flow channel 3 is greater than the diameter of the first round ball 34, and the inner diameter of the inlet closure ring 30 is smaller than the diameter of the first round ball 34. The outlet flow channel 4 is provided with a second round ball 44, and an outlet closure ring 40 is provided between the second round ball 44 and the outlet 23 of the air-containing cavity 2. The inner diameter of the outlet flow channel 4 is greater than the diameter of the second round ball 44, and the inner diameter of the outlet closure ring 40 is smaller than the diameter of the second round ball 44. The inlet flow channel and the outlet flow channel have the same structure, and the position of the closure ring and the limit point is just opposite.

[0038] Preferably, a plurality of first limit points 323 are provided on the inner wall surface of the inlet flow channel 3 between the inlet 22 of the air cavity 2 and the first round bead 34, and the first limit points 323 protrude from the inner wall of the inlet flow channel 3. The first limit points 323 are formed by rubber hot pressing through the limit holes provided on the flow channel mold core and the upper and lower molds. The distance between the top ends of the protrusions of the plurality of first limit points 323 is smaller than the diameter of the first round bead 34. A plurality of second limit points 413 are provided on the inner wall surface of the outlet flow channel 4 between the air outlet 12 and the second round bead 44, and the second limit points 413 protrude from the inner wall of the outlet flow channel 4. The distance between the top ends of the protrusions of the plurality of second limit points 413 is smaller than the diameter of the second round bead 44.

[0039] The inlet and outlet channels 3 and 4 are pipes with the same inner diameter. The diameters of the first and second round beads 34 and 44 are smaller than the inner diameter of the pipes. The first and second limit points 413 restrict the first and second round beads from sliding out of the channels while keeping the channels ventilated. The inlet and outlet blocking rings 40 restrict the round beads from sliding out of the channels while blocking the channels.

[0040] A mold for manufacturing a ventilation airbag, the airbag mold includes an upper mold 5, a middle plate 6, a lower mold 7, and a runner core. The middle plate 6 is arranged on the upper mold 5 and the lower mold 7. The upper mold 5 and the lower mold 7 are arranged parallel to each other and tightly fit on the upper and lower surfaces of the middle plate 6. The upper mold 5 and the lower mold 7 are each provided with four concave mold cavities. The upper and lower surfaces of the middle plate 6 are provided with a mirror image upper mold core 61 and a lower mold core at the position of the concave mold cavity. The upper mold 5 and the upper mold core 61 are molded together to form an upper sheet cavity. The lower mold 7 and the lower mold core are molded together to form a lower sheet cavity. A gentle slope is provided between the upper mold core 61 and the concave mold cavity, and between the lower mold core and the concave mold cavity. The gentle slope effectively reduces the occurrence of the upper film and the lower film after the connection In the case of wrinkling, airway reserved grooves are provided on the upper plate cavity and the lower plate cavity. After the middle plate is pulled out, the upper and lower molds are combined into the airway reserved groove, and the flow channel mold core is inserted into the airway reserved groove. The flow channel mold core is divided into an inlet flow channel mold core 8 and an outlet flow channel mold core 9. The inlet flow channel mold core 8 and the outlet flow channel mold core 9 have the same structure, which is a round rod. A blocking groove 82 is provided on the round rod, and a limiting hole is provided on one side of the blocking groove 82. The inlet flow channel mold core 8 and the outlet flow channel mold core 9 form an inlet and outlet flow channel at the front end of the airbag body, and the positions of the blocking grooves and limiting holes of the inlet flow channel mold core 8 and the outlet flow channel mold core 9 are just swapped, that is, the inlet flow channel mold core 8 and the outlet flow channel mold core 9 are inserted in reverse.

[0041] A method for preparing a ventilation airbag comprises the following steps:

[0042] Step 1: Preheat the mold: First, preset the vulcanization time on the vulcanizer to 50s-200s, the vulcanization temperature to 150℃-200℃ and the vulcanization pressure to 4MPa-20MPa; then, preheat the upper mold, middle plate and lower mold together, the preheating temperature is the preset temperature of the vulcanizer, and the preheating time is 40min-3h;

[0043] Step 2: Load the rubber material and close the mold: After the mold temperature is constant, separate the upper mold, the middle plate and the lower mold, put the lower rubber material (solid) into the cavity of the lower mold, and then place the middle plate on the lower mold, so that the lower mold core of the middle plate is attached to the surface of the lower rubber material, and then put the upper rubber material (solid) into the surface of the upper mold core, and then embed the upper mold core into the cavity of the upper mold, so that the upper mold core of the middle plate is attached to the surface of the upper rubber material. At this time, the material type and the cavity are matched to facilitate the rubber material to fill the cavity. The vulcanization time is 100S and the vulcanization temperature is 150℃~200℃;

[0044] Step 3: Vulcanization molding: Put the mold after the mold closing in step 2 into the vulcanizer, start the vulcanizer, heat the mold according to the preset vulcanization temperature of the vulcanizer, the upper rubber material melts and flows to the upper sheet cavity, and an upper rubber sheet with a front end inlet and outlet channel reserved groove and a hemispherical concave cavity in the middle is formed in the upper sheet cavity, and the lower rubber material melts and flows to the lower sheet cavity, and a lower rubber sheet with a front end inlet and outlet channel reserved groove and a hemispherical concave cavity in the middle is formed in the lower sheet cavity;

[0045] Step 4: Mold opening: The upper mold is separated from the lower mold and the middle plate is pulled out, and a breathable support material is placed in the hemispherical concave cavity of the upper rubber sheet or the lower rubber sheet; the breathable support material is such as sponge, leaves, buckwheat, etc. The middle plate can be pulled out in various forms, such as the most clumsy manual pulling out, or by a commonly used manipulator. For technicians in this field, there are many ways to pull out, as long as the upper mold core and the lower mold core can be pulled out from between the upper mold and the lower mold;

[0046] Step 5: Place the inlet channel mold core and the outlet channel mold core into the inlet channel and the outlet channel reserved grooves, place the upper and lower molds into the vulcanizer, hot-melt the upper and lower rubber films, and remove the inlet channel mold core and the outlet channel mold core to form a basic airbag with the inlet channel and the outlet channel; during hot-melt bonding, the hot pressing temperature is 130°C to 200°C, and the pressure value is 0.3 to 0.5Mpa;

[0047] Step 6: Insert two round beads into the space between the blocking ring and the limit point in the inlet flow channel and into the space between the blocking ring and the limit point in the outlet flow channel to complete the preparation of the airbag;

[0048] Step 8: Use air ducts made of PVC or TPU and silicone hose materials to insert into the inlet and outlet channels respectively, install the airbag into the shoe, connect the air duct connected to the inlet channel to the inside / outside of the shoe, and connect the air duct connected to the outlet channel to the outside / inside of the shoe.

[0049] In this production process, step 1, preheating the mold, is required before the first mold is produced. If the first mold is produced, step 1 can be omitted when continuous production is carried out after the second mold is produced.

[0050] In step 2, an upper mold core 61 and a lower mold core are provided on the middle plate 6. The upper mold core 61 makes the rubber skin in the upper mold 5 and the lower mold 7 tightly adhere to the inner wall of the mold cavity to form the airbag body 1, and an air-containing cavity 2 is formed in the airbag body 1.

[0051] In the present invention, the outlet flow channel mold core can be the same as the inlet flow channel mold core, and is placed in the opposite direction to the inlet flow channel during the manufacturing process.

[0052] The product is placed in the sole, and an air intake duct is inserted into the air inlet of the inlet flow channel 3, one end of the air intake duct is inserted into the air inlet section and communicated with the inlet flow channel, and the other end of the air intake duct is arranged in the shoe, so that the inlet flow channel 3 can only take in air but not let out air, and the air outlet of the outlet flow channel 4 is inserted into the air outlet duct, one end of the air outlet duct is inserted into the air outlet section and communicated with the outlet flow channel, and the other end of the air outlet duct is arranged outside the shoe, so that the outlet flow channel 4 can only let out air but not take in air, and when a person lifts it away, the support makes the air bag expand from flat to swollen, and the moist sweat in the shoe is sucked into the inlet channel from the air intake duct through the air bag, and the air bag expands, and the gas outside the air bag enters the inlet flow channel through the air intake duct and pushes the first round ball 34 to the first limit point 323, and the inlet flow channel and the air containing cavity 2 are connected, so that the gas enters the air containing cavity 2 from the inlet flow channel 3, and at the same time, the gas outside the shoe enters the outlet flow channel and pushes the second round ball 44 to the outlet closing ring, and the outlet flow channel is closed;

[0053] After a person's foot touches the ground, the airbag is compressed, and the gas in the air-containing cavity 2 enters the outlet flow channel to push the second round ball 44 to the second limit point 413. The outlet flow channel and the air-containing cavity 2 are connected, so that the gas flows out of the airbag, and the moist sweat in the shoe in the airbag is squeezed to the outside of the shoe. At the same time, the gas in the air-containing cavity 2 enters the inlet flow channel to push the first round ball 34 to the inlet blocking ring, and the inlet flow channel is closed to prevent the sweat just drawn out of the shoe from flowing back into the shoe, thereby realizing one-way air intake in the inlet flow channel 3 and one-way air outlet in the outlet flow channel 4.

[0054] When a person lifts his foot, the airbag returns to the inflated state by using its own rubber elasticity and the support of the inner cavity of the container, and the inner cavity of the container inhales air from the air inlet duct; when a person puts his foot down, the air-containing cavity of the airbag is flattened, and the air in the airbag is squeezed out through the outlet duct. This cycle achieves the purpose of air inhalation and exhaust. The airbag structure of the present invention realizes the active inhalation and forced discharge of air by the airbag.

[0055] Embodiment 2

[0056] The difference between the second embodiment and the first embodiment is that the structures of the inlet flow channel 3 and the outlet flow channel are different, and the inlet flow channel mold core and the outlet flow channel mold core used have different structures.

[0057] In the second embodiment, the inlet flow duct 3 includes a first air inlet section 31, a second air inlet section 32 and a first interface 33 connecting the first air inlet section 31 and the second air inlet section 32, and the second air inlet section 32 is provided with a first round ball 34 for opening or closing the first interface 33. The outlet flow duct 4 includes a first air outlet section 41, a second air outlet section 42 and a second interface 43 connecting the first air outlet section 41 and the second air outlet section 42, and the first air outlet section 41 is provided with a second round ball 44 for opening or closing the second interface 43.

[0058] Preferably, the first air intake section 31 is provided with an air intake section 311 and an air intake blocking section 312 in sequence from the air inlet to the air containing cavity 2, and the second air intake section 32 is provided with a first round ball cavity section 321 and a first air containing cavity connecting section 322 in sequence from the air inlet to the air containing cavity 2, and a first limiting point 323 is provided between the first round ball cavity section 321 and the first air containing cavity connecting section 322. The inner diameter of the air intake section 311 is larger than the diameter of the first round ball, and the air intake section 311 facilitates the first round ball 34 to be inserted into the air intake blocking section 312. Secondly, the air intake section 311 is used to insert an airway to facilitate gas inhalation. The air intake blocking section 312 forms a first interface that passes through the first air intake section 31 and the second air intake section 32. The air intake blocking section 312 has two ends, one near the air inlet and the other near the air inlet. The inner diameter of the first end is larger than the diameter of the first round ball 34, and the inner diameter close to the end of the air-containing cavity 2 is smaller than the diameter of the first round ball. The inner diameter of the first round ball cavity section 321 is larger than the diameter of the first round ball 34. The first limit point 323 limits the first round ball 34 in the first round ball cavity section 321. The first limit point 323 is a convex point or a convex column formed on the inner wall of the intake air channel 3, which only limits the position of the first round ball 34 to prevent the first round ball 34 from entering the airbag and to allow a gap between the first round ball 34 and the inner wall of the intake air channel 3, that is, to limit the first round ball 34 from falling off and entering the airbag while keeping the intake air channel 3 and the air-containing cavity 2 ventilated. The first round ball 34 moves back and forth between the intake blocking section 312 and the first limit point 323 in the first round ball cavity section 321 under the push of the gas.

[0059] Preferably, the first air outlet section 41 is provided with an air outlet section 411 and a second round ball cavity section 412 in sequence from the air outlet to the air containing cavity 2, and a second limiting point 413 is provided between the air outlet section 411 and the second round ball cavity section 412, the second limiting point 413 limits the round ball from falling off and running out of the airbag while maintaining ventilation between the air outlet flow channel 4 and the air containing cavity 2, and the second limiting point 413 limits the second round ball 44 in the second round ball cavity section 412, and the second air inlet section 32 is provided with an air outlet blocking section and a second air containing cavity connecting section 422 in sequence from the air outlet to the air containing cavity 2. , the inner diameters of the air outlet section 411 and the second round ball cavity section 412 are larger than the diameter of the second round ball 44, the air outlet blocking section forms a second interface that passes through the first air outlet section and the second air outlet section, the air outlet blocking section has two ends, the inner diameter of the end close to the air outlet is larger than the diameter of the second round ball 44, the inner diameter of the end close to the air containing cavity 2 is smaller than the diameter of the second round ball 44, the inner diameter of the second air containing cavity connecting section 422 is smaller than the diameter of the second round ball 44, and the second round ball 44 moves back and forth between the second limit point 413 and the second air outlet section 42 in the second round ball cavity section 412 under the push of gas. In the present invention, the air outlet blocking section can be omitted, and the diameter of the second air containing cavity connecting section 422 is smaller than the diameter of the second round ball 44, which can also solve the technical solution of the present invention. The existence or absence of the air outlet blocking section depends on whether the structure of the outlet flow channel mold core is consistent with the inlet flow channel mold core.

[0060] The present invention has a simple structure. An inlet airflow channel and an outlet airflow channel are integrally formed on the airbag body. A first round ball is used to move between the air inlet blocking section and the first limiting point to achieve one-way air inlet, and a second round ball is used to move between the air outlet blocking section and the second limiting point to achieve one-way air outlet. This not only ensures the control effect of the present invention on the airflow, but also simplifies the overall structure. The airflow outside the airbag enters the inlet airflow channel and pushes the first round ball 34 to the first limiting point. The first round ball 34 opens the first interface, and the inlet airflow channel opens for air inlet. The airflow outside the airbag enters the outlet airflow channel and pushes the second round ball 44 to the second outlet section 42. The second round ball 42 blocks the second interface, and the outlet airflow channel is closed, thereby achieving one-way air inlet in the inlet airflow channel. The airflow inside the airbag enters the inlet airflow channel and pushes the first round ball 34 to the inlet blocking section. The first round ball 34 blocks the first interface, and the inlet airflow channel is closed, thereby preventing the airflow inside the airbag from flowing back. The airflow inside the airbag enters the outlet airflow channel and pushes the round ball to the second limiting point 413, and the outlet airflow channel opens for air outlet, thereby achieving one-way air outlet in the outlet airflow channel.

[0061] Place the product into the sole, insert an air intake duct into the air inlet of the air intake channel 3, one end of the air intake duct is inserted into the air intake section and communicated with the air intake channel, the other end of the air intake duct is arranged inside the shoe, the air intake channel 3 can only take in air but not out, the air outlet of the outlet channel 4 is inserted into the air outlet duct, one end of the air outlet duct is inserted into the air outlet section and communicated with the outlet channel, the other end of the air outlet duct is arranged outside the shoe, the outlet channel 4 can only outflow air but not take in air, when the person is carried away, the humid sweat in the shoe enters the airbag through the air intake channel, the airbag expands, and the gas outside the airbag passes through the air intake duct After entering the air inlet section 311, the first round ball 34 is pushed from the air inlet blocking section 312 to the first limit point 323, the first round ball 34 opens the first interface, the air inlet section 311, the air inlet blocking section 312, the first round ball cavity section 321, the first air cavity connecting section 322 and the air cavity 2 are connected, so that the gas enters the air cavity 2 from the air inlet flow channel 3. At the same time, after the gas outside the shoe enters the air outlet section, the second round ball 44 is pushed from the round ball cavity section to the second air outlet section, the second round ball 44 blocks the second interface, and the air outlet flow channel is closed;

[0062] After the human foot touches the ground, the airbag is compressed, and the gas in the air-containing cavity 2 causes the second round ball 44 to flow from the second interface to the second limit point 413, and the air outlet section 411, the air outlet blocking section, the second round ball cavity section 412, the second air-containing cavity connecting section 422 and the air-containing cavity 2 are connected, so that the gas flows out of the airbag, and the moist sweat in the shoe in the airbag is squeezed to the outside of the shoe. At the same time, the gas in the air-containing cavity 2 causes the first round ball 34 to be pushed from the first limit point 323 to the air inlet blocking section 312 to block the first interface 33, and the gas in the air-containing cavity cannot enter the air inlet section 311, preventing the sweat just drawn out of the shoe from flowing back into the shoe, thereby realizing one-way air intake in the inlet flow channel 3 and one-way air outlet in the outlet flow channel 4.

[0063] Preferably, the intake air duct mold core 8 includes a first cylinder and a second cylinder, the outer diameter of the first cylinder is larger than the outer diameter of the second cylinder, a circle of grooves 82 is provided on the first cylinder, and a first limiting hole 81 is provided at the connection between the first cylinder and the second cylinder. After the upper mold core 8 is placed in the airbag body 1, the intake air duct 3 is formed by hot molding treatment, the first interface is formed by the groove 82, and the first limiting point is formed by the first limiting hole 81.

[0064] Preferably, the outlet flow channel mold core 9 includes a third cylinder and a fourth cylinder, the outer diameter of the third cylinder is larger than the outer diameter of the fourth cylinder, and the third cylinder is provided with a second limiting hole 91. After the lower mold core 9 is placed in the airbag body 1, the outlet flow channel 4 is formed by hot molding treatment, and the second limiting point 432 is formed by the second limiting hole 91.

[0065] The structure of the inlet flow channel 3 and the outlet flow channel 4 integrally formed with the airbag of the present invention realizes one-way air intake from the inlet flow channel 3 and one-way air outlet from the outlet flow channel 4, thereby preventing backflow, that is, the gas in the shoe enters the airbag, and the gas just inhaled from the shoe cannot flow back into the shoe but can only be discharged outside the shoe, solving the problem of backflow of the inhaled air in the existing airbag, and effectively avoiding the disadvantage that the airbag only realizes the air flow inside and outside the shoe but cannot really achieve the ventilation effect.

[0066] According to different needs of users, the inlet flow channel 3 and the outlet flow channel 4 are swapped, and the air outside the shoe is sucked into the shoe through the air bag, that is, the air inlet of the inlet flow channel 3 is inserted into the air inlet duct, the air inlet duct is arranged outside the shoe, and the air outlet of the outlet flow channel 4 is inserted into the air outlet duct, and the air outlet duct is arranged inside the shoe.

[0067] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A ventilation airbag, comprising an airbag body, wherein the airbag body is provided with an air-containing cavity, and the front end of the airbag body is provided with a one-way inlet flow channel and a one-way outlet flow channel communicating with the air-containing cavity, characterized in that: The airbag body, the one-way inlet flow channel and the one-way outlet flow channel are formed as one piece, a first round ball is arranged in the inlet flow channel, an inlet closure ring is arranged between the first round ball and the air inlet, the inner diameter of the inlet flow channel is larger than the diameter of the first round ball, the inner diameter of the inlet closure ring is smaller than the diameter of the first round ball, a second round ball is arranged in the outlet flow channel, an outlet closure ring is arranged between the second round ball and the outlet of the air containing cavity, the inner diameter of the outlet flow channel is larger than the diameter of the second round ball, the inner diameter of the outlet closure ring is smaller than the diameter of the second round ball; a plurality of first limiting points are arranged on the inner wall surface of the inlet flow channel between the inlet of the air containing cavity and the first round ball, the first limiting point protrudes from the inner wall of the inlet flow channel, the distance between the top ends of the protrusions of the plurality of first limiting points is smaller than the diameter of the first round ball, a plurality of second limiting points are arranged on the inner wall surface of the outlet flow channel between the air outlet and the second round ball, the second limiting point protrudes from the inner wall of the outlet flow channel, the distance between the top ends of the protrusions of the plurality of second limiting points is smaller than the diameter of the second round ball, and the air containing cavity is filled with a breathable supporting filler.

2. A mold for manufacturing the ventilating airbag as claimed in claim 1, characterized in that: The airbag mold comprises an upper mold, a middle plate and a lower mold, the middle plate is arranged between the upper mold and the lower mold, the upper mold and the lower mold are arranged parallel to each other and tightly fit on the upper and lower surfaces of the middle plate, the upper mold and the lower mold are each provided with at least one recessed mold cavity, and the upper and lower surfaces of the middle plate are provided with protruding upper mold core and lower mold core at the corresponding recessed mold cavity positions, the upper mold recessed mold cavity is molded together with the middle plate upper mold core to form an upper piece cavity, the lower mold recessed mold cavity is molded together with the middle plate lower mold core to form a lower piece cavity, the upper piece cavity and the lower piece cavity are provided with an inlet air channel reserved groove and an outlet air channel reserved groove, the airbag mold also comprises an inlet air channel mold core and an outlet air channel mold core matched with the inlet air channel reserved groove, the inlet air channel mold core and the outlet air channel mold core are a round rod, the round rod is provided with a blocking groove, and a limiting hole is provided on one side of the blocking groove.

3. A method for preparing the ventilation airbag according to claim 1, characterized in that: The steps include: Step 1: Preheat the mold: preheat the upper mold, middle plate and lower mold; Step 2: Load the rubber material and close the mold: After the mold temperature reaches the set value, separate the upper mold, middle plate and lower mold, put the lower rubber material into the concave mold cavity of the lower mold, and then place the middle plate on the lower mold so that the lower mold core of the middle plate is attached to the surface of the lower rubber material, and then put the upper rubber material on the mold core surface of the middle plate, and then cover the upper mold on the middle plate so that the concave mold cavity of the upper cover is attached to the surface of the upper rubber material; Step 3: Vulcanization molding: Put the mold after mold closing in step 2 into the vulcanizer, start the vulcanizer to close the mold, heat the mold according to the preset vulcanization temperature of the vulcanizer, the upper rubber material melts and flows to the upper piece cavity, and forms an airbag upper piece with a front end inlet and outlet channel reserved groove and a hemispherical concave cavity in the middle in the upper piece cavity, and the lower rubber material melts and flows to the lower piece cavity, and forms an airbag lower piece with a front end inlet and outlet channel reserved groove and a hemispherical concave cavity in the middle in the lower piece cavity; Step 4: Open the mold: separate the upper mold from the lower mold and remove the middle plate, and put the breathable support material into the hemispherical concave cavity of the lower plate of the airbag; Step 5: Place the inlet channel mold core and the outlet channel mold core into the inlet channel and the outlet channel reserved grooves, place the mold with the upper mold and the lower mold into a vulcanizer for pressurization and heating, hot-melt the edges of the upper airbag piece and the lower airbag piece, remove the inlet channel mold core and the outlet channel mold core, and make a basic airbag with the inlet channel and the outlet channel left; Step 6: Insert the two round beads into the inlet and outlet channels respectively to complete the preparation of the airbag.

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