A low-resistance hollow breathable sole and its preparation process

Abstract

The present invention relates to the technical field of shoe soles and preparation processes, and discloses a low-resistance hollow breathable shoe sole and a preparation process. It includes a front shoe sole and a midsole. The midsole includes an integrally formed front sole part, a heel part, and a middle waist part corresponding to the arch position. A first connecting part is provided at the connection between the front sole part and the front shoe sole. A U-shaped heel cup for firm anti-ankle sprain is provided on the first connecting part. A first through hole is provided on one side of the first connecting part and at the top position of the front shoe sole. A second connecting part for reducing friction pain of the rear heel and foot is provided on the outer side of the heel part; the midsole is designed with a hollow structure. A support area is provided on the middle waist part, and a first elastic cushion block is provided on the support area. The present invention has the beneficial effects of being light, anti-ankle sprain and breathable, and reducing the soreness of the calf, ankle and other parts caused by frequent squeezing of flat feet during walking.

Description

Technical Field

[0001] The present invention relates to the technical field of shoe soles and preparation processes, and particularly to a low-resistance hollow breathable shoe sole and a preparation process. Background Art

[0002] The structure of the shoe sole is quite complex. Generally speaking, it can include all the materials that make up the bottom, such as the outsole, midsole, and heel. Narrowly speaking, it only refers to the outsole. Generally, the common characteristics of shoe sole materials should include wear resistance, water resistance, oil resistance, heat resistance, pressure resistance, impact resistance, good elasticity, easy to fit the foot shape, not easy to deform after shaping, heat preservation, easy to absorb moisture, etc. At the same time, it should cooperate with the midsole to have a braking effect when walking and changing feet, so as not to slip and be easy to stop. There are many types of shoe sole materials, which can be divided into two categories: natural base materials and synthetic base materials. Natural base materials include natural sole leather, bamboo, wood, etc., and synthetic base materials include rubber, plastic, rubber-plastic composite materials, regenerated leather, elastic cardboard, etc.

[0003] Most of the existing sports shoe soles are designed for sports. However, for some people with flat feet, when choosing a shoe sole, they mostly choose a thicker shoe sole to reduce the wear of the shoes. However, a thick shoe sole is not light, and choosing a thin shoe sole cannot effectively protect the arch of the flat feet. Therefore, people with flat feet have great difficulties in choosing a shoe sole.

[0004] Summary of the Invention

[0005] The present invention provides a low-resistance hollow breathable shoe sole and a preparation process, which have the beneficial effects of being light, anti-ankle-twisting and breathable, and reducing the soreness of the calf, ankle and other parts caused by frequent squeezing of flat feet when walking, and solve the problem of difficult protection of the arch of the foot of flat-footed people mentioned in the above background art.

[0006] The present invention provides the following technical solution: A low-resistance hollow breathable shoe sole includes a front shoe sole and a mid shoe sole. The mid shoe sole includes an integrally formed forefoot part, a heel part, and a mid-waist part corresponding to the arch position. A first connecting part is provided at the connection between the forefoot part and the front shoe sole. A U-shaped heel cup for firm anti-ankle-twisting is provided on the first connecting part. A first through hole is provided on one side of the first connecting part and at the top position of the front shoe sole. The first through hole is set in an arc shape. A second connecting part for reducing the friction pain of the rear heel is provided on the outer side of the heel part;

[0007] The mid shoe sole is designed in a hollow shape. Second through holes are evenly spaced at the edges of the forefoot part and the mid-waist part. The second through holes are set in an arc-shaped quadrilateral. A support area is provided on the mid-waist part. A first elastic cushion block is provided on the support area. And a hollow hole is provided on the support area. The hollow hole is set in a diamond shape. An arc-shaped cushion block is provided on the mid-waist part and on the side close to the inner side of the foot.

[0008] As an alternative solution of the low-resistance hollow breathable sole described in the present invention, the following is provided: First grooves and second grooves are respectively formed on the midsole of the shoe. The first grooves are disposed at the heel portion, and a plurality of groups of the first grooves are provided, and the plurality of groups of the first grooves are arranged in a staggered manner. The second groove is formed in a ring shape, and the depth dimension of the second groove increases sequentially from the arch portion to the heel portion.

[0009] As an alternative solution of the low-resistance hollow breathable sole described in the present invention, the following is provided: An air storage cavity is disposed inside the heel portion, and ventilation holes are formed inside the air storage cavity. The depths of the plurality of groups of ventilation holes increase sequentially along with the thickness of the heel portion.

[0010] As an alternative solution of the low-resistance hollow breathable sole described in the present invention, the following is provided: First drainage grooves are symmetrically formed on both sides inside the first through hole. One side of each of the two groups of first drainage grooves communicates with a plurality of groups of second drainage grooves, and the plurality of groups of second drainage grooves are arranged in a linear array.

[0011] As an alternative solution of the low-resistance hollow breathable sole described in the present invention, the following is provided: The second connecting portion includes an arc-shaped protruding section, a heel protection pad is disposed on the arc-shaped protruding section, and a bone beam air cushion is disposed at the connection between the heel protection pad and the arc-shaped protruding section.

[0012] As an alternative solution of the low-resistance hollow breathable sole described in the present invention, the following is provided: A first concave section is formed at the middle position of the bone beam air cushion. A second concave section is disposed at one end of the first concave section close to the heel portion, and a spine protection strip is disposed at one end of the first concave section away from the heel portion.

[0013] As an alternative solution of the low-resistance hollow breathable sole described in the present invention, the following is provided: A third groove is formed on the heel portion, a compression spring is disposed inside the third groove, a plurality of groups of the compression springs are provided, and the plurality of groups of compression springs are arranged in an array.

[0014] As an alternative solution of the low-resistance hollow breathable sole described in the present invention, the following is provided: Anti-slip patterns are provided between the forefoot portion and the middle waist portion.

[0015] As a production process of the low-resistance hollow breathable sole described in the present invention, the following steps are included:

[0016] S1: Automatic feeding. The shoe midsole formed by injecting materials into a mold and then heating them at high temperature in one go is called a one - time foamed midsole, that is, an EVA shoe midsole. It is set as a polymer material, using EVA, PU, SBS foamed dense products. The material used for foaming, the polyurethane sole, takes polyurethane resin as the main raw material and the foaming adhesive as the auxiliary raw material.

[0017] S2: After automatic plasticization and automatic metering, flowable plastic liquid is injected into the mold. The shoe midsole sintered and formed after two high - temperature heatings is called a two - time foamed midsole. The softness and hardness of the sole are also controlled by temperature. After forming, it is demolded and then bonded and assembled.

[0018] S3: Sole filling: Install fillers and compression springs in the sole gaps, which play a role in being elastic when stepped on and buffering and shock absorption. The hollow part is filled with cork and steel bars for firmness and durability.

[0019] S4: Welt assembly and bonding. By connecting the insole and the outsole of the shoe, it effectively supports the entire shoe structure. Grooves are made on the outsole, and then the stitches are buried, and finally the grooves are sealed to make the edge airtight.

[0020] S5: Punching holes at the bottom of the sole. After punching holes at the bottom of the sole, the material is soft and hard enough to bear the weight of the human body when stepped on. The design of being light in weight and having hollow openings makes the air permeability stronger. Anti - slip strips and bumps are bonded to the bottom of the sole after punching holes.

[0021] The present invention has the following beneficial effects:

[0022] 1. For this low - resistance hollow breathable sole and its preparation process, the shoe midsole has a hollow design. There is a support area on the middle waist, and there is a first elastic rubber pad on the support area in the middle area of the support foot. It not only has excellent shock - absorption performance, and the elastic material helps the feet to be more rapid in the starting process, and can protect the center position of the foot when stopping running, increasing the grip and friction. Moreover, there are hollow holes on the support area, and the hollow holes are in a diamond shape. The hollow holes are convenient for three - dimensional ventilation. Because of the arch, the ventilation space is larger, and the ventilation effect is better, playing a role in ventilation. On the middle waist and on the side close to the inner side of the foot, there is an arc - shaped pad, which is used to protect the weak part on the inner side of the arch. Some people with flat feet have a very low arch or even no arch, resulting in rear - foot valgus. When walking, the inner side of the sole or the entire sole will directly contact the ground, and the sole is evenly stressed, resulting in wear and tear in the middle position of the sole. Through the arc - shaped pad, strong arch support is increased. The heel has good elasticity and support force, which can reduce the small arch force of people with flat feet to reduce pressure, achieve overall balance, and reduce the frequent squeezing of flat feet when walking, and relieve the soreness of the calf, ankle and other parts caused by walking too much.

[0023] 2. The low-resistance hollow breathable sole and its manufacturing process have an air storage cavity inside the heel part. There are ventilation holes inside the air storage cavity, and the depths of several groups of ventilation holes increase successively along with the thickness of the heel part. In this way, when the feet sweat, there will be no uncomfortable feeling of stuffiness, which increases the rapid evaporation of foot sweat and reduces the risk of the feet being infected by bacteria and fungi. Thus, the volume of the space layer changes due to the pressure of human walking in the air storage cavity and several groups of ventilation holes, and gas exchange is automatically carried out, so as to achieve the purpose of ventilation and moisture removal.

[0024] 3. The low-resistance hollow breathable sole and its manufacturing process have a second connecting part including an arc-shaped protruding section. There is a heel protection pad on the arc-shaped protruding section, and a bone beam air cushion is arranged at the connection between the heel protection pad and the arc-shaped protruding section. The bone beam air cushion is made of foam material, which is light and has a small friction force on the feet. There is a first concave section in the middle position of the bone beam air cushion. A second concave section is arranged at one end of the first concave section close to the heel part, and a spine protection strip is arranged at one end of the first concave section far from the heel part. The function of the second connecting part is to reduce the ground reaction force and avoid improper extrusion of the ground reaction force on the spine, knees, ankles, etc., causing sports injuries. It is used to protect the ligaments of the heel, protect the ankles, and increase the comfort of the sole.

[0025] 4. The low-resistance hollow breathable sole and its manufacturing process first plastify, then inject and foam the midsole twice through automatic metering. After adding vacuum and sulfur for about 400 seconds, the mold is opened, and the sole in the mold foams and forms. Then it goes through heat and cold setting. After forming, it is demolded for bonding the sole, sealing and filling, assembling the welt, and punching holes in the hollow part at the bottom. Finally, anti-slip patterns are made to complete the process production, which plays the role of an integrated and convenient production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a top view schematic diagram of the structure of the present invention.

[0027] Figure 2 It is an axonometric schematic diagram of the structure of the present invention.

[0028] Figure 3 It is a schematic diagram of the structure of the second connecting part of the present invention.

[0029] Figure 4 It is a cross-sectional view schematic diagram of the structure of the first through hole of the present invention.

[0030] Figure 5 It is a schematic diagram of the structure of the third groove of the present invention.

[0031] Figure 6 It is a schematic diagram of the steps of the process of the present invention.

[0032] In the figure: 1, front sole of the shoe; 2, midsole of the shoe; 3, forefoot part; 4, heel part; 5, mid-waist part; 6, first connecting part; 7, first through hole; 8, second connecting part; 801, arc-shaped protruding section; 802, first concave section; 803, spinal protection strip block; 804, second concave section; 805, heel protection pad; 806, bone beam air cushion; 9, second through hole; 10, support area; 11, first elastic cushion block; 12, hollow hole; 13, arc-shaped cushion block; 14, anti-slip pattern; 15, U-shaped heel cup; 16, ventilation hole; 17, first groove; 18, second groove; 19, first drainage groove; 20, second drainage groove; 21, third groove; 22, compression spring; 23, air storage cavity. Detailed implementation mode

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1-5 , the present invention provides the following technical solutions: a low-resistance hollow breathable shoe sole, including a front sole 1 of the shoe and a midsole 2 of the shoe. The midsole 2 includes an integrally formed forefoot part 3, a heel part 4, and a mid-waist part 5 corresponding to the arch position. A first connecting part 6 is provided at the connection between the forefoot part 3 and the front sole 1 of the shoe. A U-shaped heel cup 15 for firming and preventing ankle sprains is provided on the first connecting part 6. A first through hole 7 is provided on one side of the first connecting part 6 and at the top position of the front sole 1 of the shoe. The first through hole 7 is set to be arc-shaped. A second connecting part 8 for reducing friction pain at the back of the shoe and the heel is provided on the outer side of the heel part 4;

[0035] The midsole 2 of the shoe is designed with a hollow structure. Second through-holes 9 are evenly spaced at the edges of the forefoot part 3 and the mid-waist part 5. The second through-holes 9 are arranged in an arc-shaped quadrilateral. A support area 10 is provided on the mid-waist part 5, and a first elastic cushion block 11 is provided on the support area 10. The first elastic cushion block 11 is set as a rubber elastic cushion block, which is used to support the middle area of the foot. It not only has excellent shock absorption performance, but the elastic material helps the feet to be more rapid during the starting process, and can protect the center position of the foot when stopping running, increasing the grip and friction. Moreover, a hollow hole 12 is provided on the support area 10, and the hollow hole 12 is arranged in a diamond shape. The hollow hole 12 facilitates three-dimensional ventilation. Due to the presence of the arch, the ventilation space is larger, and the ventilation effect is better, playing a role in ventilation. On the mid-waist part 5 and on the side close to the inner side of the foot, an arc-shaped cushion block 13 is provided. The arc-shaped cushion block 13 is used to protect the weak part on the inner side of the arch. Some people with flat feet have a very low arch or even no arch, resulting in rear-foot valgus. When walking, the inner side of the sole or the entire sole will directly contact the ground, and the sole is evenly stressed, resulting in wear and tear in the middle position of the sole. By adding a strong arch support through the arc-shaped cushion block 13, the heel has good elasticity and support force, which can reduce the small arch force of people with flat feet to reduce pressure, achieve overall balance, and reduce the frequent squeezing of flat feet when walking, and avoid the soreness of the calf, ankle and other parts caused by walking too much.

[0036] Among them: a first groove 17 and a second groove 18 are respectively provided on the midsole 2 of the shoe. The first groove 17 is arranged at the position of the heel part 4, and the first groove 17 is set as several groups, and several groups of the first grooves 17 are arranged in a staggered manner. The second groove 18 is arranged in a ring shape, and the depth dimension of the second groove 18 increases sequentially from the arch part to the heel part.

[0037] Among them: an air storage cavity 23 is provided inside the heel part 4. Ventilation holes 16 are provided inside the air storage cavity 23. The depths of several groups of ventilation holes 16 increase sequentially along with the thickness of the heel part. In this way, when the feet sweat, it will not cause discomfort and a stuffy feeling on the feet, increasing the rapid evaporation of foot sweat and reducing the risk of the feet being infected by bacteria and fungi. Thus, in the air storage cavity 23 and several groups of ventilation holes 16, the volume of the space layer changes by means of the pressure of human walking, and gas exchange is automatically carried out, so as to achieve the purpose of ventilation and moisture removal.

[0038] Among them: first drainage grooves 19 are symmetrically provided on both sides inside the first through-hole 7. One side of each of the two groups of first drainage grooves 19 is communicated with several groups of second drainage grooves 20. The several groups of second drainage grooves 20 are arranged in a linear array to reduce resistance, and in rainy days, drainage can be carried out through the first drainage grooves 19 and the second drainage grooves 20.

[0039] The second connecting portion 8 includes an arc-shaped protruding section 801. A heel guard pad 805 is provided on the arc-shaped protruding section 801. A bone beam air cushion 806 is provided at the connection between the heel guard pad 805 and the arc-shaped protruding section 801. The bone beam air cushion 806 is made of foam material, which is light and has a small frictional force on the foot. A first concave section 802 is formed at the middle position of the bone beam air cushion 806. A second concave section 804 is provided at one end of the first concave section 802 close to the heel portion 4. A spine protection strip 803 is provided at one end of the first concave section 802 away from the heel portion 4. The function of the second connecting portion 8 is to reduce the ground reaction force and prevent the spine, knees, ankles, etc. from being squeezed by improper ground reaction forces, causing sports injuries. It is used to protect the ligaments of the heel, protect the ankles, and increase the comfort of the shoe sole.

[0040] Wherein: a third groove 21 is formed on the heel portion 4. A compression spring 22 is arranged inside the third groove 21. There are multiple groups of compression springs 22, and several groups of compression springs 22 are arranged in an array. The compression spring 22 has a shock absorption function. A shoe sole with good shock absorption performance can slow down the impact of external forces on the foot.

[0041] Wherein: anti-slip patterns 14 are provided between the forefoot portion 3 and the mid-waist portion 5 to increase the anti-slip function of the shoe sole. The patterns on the anti-slip patterns 14 can increase friction, reduce the chance of slipping, and secondly, can replace the wear of the shoe sole, extend the service life of the shoe sole, and have an anti-slip effect.

[0042] Please refer to Figure 6 This embodiment also provides a production process for a low-resistance hollow breathable shoe sole, including the following steps:

[0043] S1: The process flow of the shoe sole workshop includes pre-treating and truncating the raw materials in the early stage, and then vulcanizing and trimming. After production is completed, it waits for the next process treatment. It is an automatic feeding process. The shoe midsole formed by injecting the material into the mold and heating it at high temperature is called a one-time foamed midsole, that is, an EVA shoe midsole. The injection machine directly injects EVA resin particles into the machine mold. The EVA shoe midsole material is set as a high-molecular material, and EVA, PU, and SBS foamed dense products are used. The material for foaming is polyurethane shoe sole, with polyurethane resin as the main raw material and foaming adhesive as the auxiliary raw material;

[0044] S2: After automatic plasticization and automatic metering, the flowing plastic liquid is injected into the mold. After two high-temperature heating, the midsole is fired and formed. It is called a secondary foaming midsole. In the process of firing the PHYLON midsole, the higher the temperature, the greater the density of the fired PHYLON, and the harder it is. The lower the temperature, the lighter and softer the fired PHYLON will be. Therefore, the quality of the shoe midsole cannot be measured by weight or the degree of hardness and softness. The hardness of PHYLON will also be different in different secondary foaming processes. The midsole of the shoe that is formed once after high-temperature heating is called a single foaming midsole, that is, the hardness of the EVA midsole is also controlled by temperature. After about 400 seconds of vacuum vulcanization, the mold is opened, and the sole in the mold is foamed and formed, and then heat and cold are set. After forming, it is demolded for bonding and assembly. After the sole is formed, a layer of chemical substances, mold release agent and release agent need to be sprayed in the mold to facilitate demolding;

[0045] S3: Sole filling: fillers and compression springs are installed in the gaps of the soles to make them elastic and cushion the shock when stepped on. The hollow parts are filled with cork and steel bars for durability.

[0046] S4: Assembly and bonding of the welt, by connecting the insole and the outer sole, it effectively supports the entire shoe structure. After the grooves are punched on the outsole, the stitches are buried, and finally the grooves are sealed to make the edges sealed. Some parts of the sole have burrs that need to be polished before continuing assembly;

[0047] S5: Punching holes at the bottom of the sole. After punching, the material remains soft and hard, and can bear the weight of the human body when stepped on, making the material light. The hollow hole design makes it more breathable. The holes at the bottom of the sole are used to glue anti-slip strips and bumps to make anti-slip patterns.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A low-resistance hollow breathable sole, comprising a front sole (1) and a midsole (2), characterized in that: The shoe midsole (2) includes an integrally formed forefoot part (3), a heel part (4), and a middle waist part (5) corresponding to the arch position. A first connecting part (6) is provided at the connection between the forefoot part (3) and the shoe outsole (1). A U-shaped heel cup (15) for firm anti-ankle sprain is provided on the first connecting part (6). The shoe outsole is connected to the forefoot part in the thickness direction of the sole. A first through hole (7) is provided on one side of the first connecting part (6) and at the top position of the shoe outsole (1). The first through hole (7) is set to be arc-shaped. First drainage grooves (19) are symmetrically opened on both sides inside the first through hole (7). One side of each of the two groups of first drainage grooves (19) is communicated with a plurality of groups of second drainage grooves (20). The plurality of groups of second drainage grooves (20) are arranged in a linear array. A second connecting part (8) for reducing the frictional pain of the rear heel is provided on the outer side of the heel part (4). The shoe midsole (2) is designed with a hollow structure. Second through holes (9) are equally spaced at the edges of the forefoot part (3) and the middle waist part (5). The second through holes (9) are set to be arc-shaped quadrilaterals. A support area (10) is provided on the middle waist part (5). A first elastic cushion block (11) is provided on the support area (10). And a hollow hole (12) is provided on the support area (10). The hollow hole (12) is set to be diamond-shaped. An arc-shaped cushion block (13) is provided on the middle waist part (5) and on the side close to the inner side of the foot.

2. The low-resistance hollow breathable sole according to claim 1, wherein: A first groove (17) and a second groove (18) are respectively provided on the shoe midsole (2). The first groove (17) is provided at the position of the heel part (4). And the first groove (17) is provided in a plurality of groups. And the plurality of groups of first grooves (17) are arranged staggeredly. The second groove (18) is set to be annular. The depth dimension of the second groove (18) increases successively from the arch part to the heel part.

3. The low-resistance hollow breathable sole according to claim 1, wherein: An air storage cavity (23) is provided inside the heel part (4). Air permeation holes (16) are provided inside the air storage cavity (23). The depths of the plurality of groups of air permeation holes (16) increase successively along with the thickness of the heel part.

4. A low-resistance hollow breathable sole according to claim 1, characterized in that: The second connecting part (8) includes an arc-shaped protruding section (801). A heel protection cushion (805) is provided on the arc-shaped protruding section (801). A bone beam air cushion (806) is provided at the connection between the heel protection cushion (805) and the arc-shaped protruding section (801).

5. A low-resistance hollow breathable sole according to claim 4, characterized in that: A first concave section (802) is provided at the middle position of the bone beam air cushion (806). A second concave section (804) is provided at one end of the first concave section (802) close to the heel part (4). A spine protection strip block (803) is provided at one end of the first concave section (802) far from the heel part (4).

6. The low-resistance hollow breathable sole according to claim 1, characterized in that: A third groove (21) is provided on the heel part (4). A compression spring (22) is provided inside the third groove (21). The compression spring (22) is provided in a plurality of groups. And the plurality of groups of compression springs (22) are arranged in an array.

7. A low-resistance hollow breathable sole according to claim 1, characterized in that: An anti-slip pattern (14) is provided between the forefoot part (3) and the middle waist part (5).

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