KR100807642B1 - The middle layer of a shoe sole and manufacturing method thereof - Google Patents

Abstract

A middle layer of a shoe sole and a manufacturing method for the same are provided to absorb shock and to achieve a ventilation function by inserting gel into front and rear parts of a midsole and punching holes thereon. A middle layer of a shoe sole is interposed between a bottom sole and an insole, and includes a body(110), a main gel(210) and a sub-gel(220). The body is cut according to the shape of a foot. A fixing hole(120) is formed on a part of the body where a user's heel is placed. An insertion recess(130) is formed on a part of the body where a front port of a user's foot is placed. The main gel is fixed on the fixing hole of the body, and includes upper and lower plates and a gel connection plate. The sub gel is injected and molded in the insertion recess of the body and is formed to be convex in an upper direction.

Description

Shoe midsole and its manufacturing method {THE MIDDLE LAYER OF A SHOE SOLE AND MANUFACTURING METHOD THEREOF}

1 is an exemplary perspective view of a shoe midsole in accordance with the present invention;

2 is an exploded perspective view of an exemplary shoe midsole in accordance with the present invention;

3 is an exemplary view showing a manufacturing process of a shoe midsole according to the present invention.

♧ description of the symbols for the main parts of the drawing ♧

100 .... Mids 110 .... Body

120 .... Fixed hole 130 .... Insertion groove

210 .... Maingel 212,222 ...

220 .... Subgel

The present invention relates to a shoe midsole and a method of manufacturing the same, and in particular, geometrical processing to fit the shape of the human foot to increase the flexibility and shock absorbency and breathability, even wearing shoes for a long time to reduce fatigue and increase the service life of the shoe It relates to an improved shoe midsole and its manufacturing method.

In general, as a means of protecting a person's foot, the shoe wraps around the wearer's foot to alleviate the impact of the foot when running or walking, thereby reducing the fatigue of the foot and protecting the environment from the external environment.

Such shoes are usually composed of an insole located on the bottom side, a midsole located on the upper side of the insole, an insole located on the upper side of the midsole, and an upper that wraps the foot and contacts the sole and forms the shoe's appearance.

At this time, according to the foot studies, more than 40% of the body weight of the heel, about 35% of the big toe and the rest of the toes, 25% of the rest of the foot, etc. The foot is composed of a plurality of bones, joints, and muscles, which support the human body and at the same time, intensively collects the main blood connected to other parts of the human body. It has been reported to cause pain in the hips, hips and back, or as a factor causing other diseases.

Therefore, if the wearer wears shoes for a long time or stands for a long time, the fatigue of the foot accumulates, the elasticity of the insole decreases, and the hard midsole part has a similar effect to the direct contact with the foot. This can lead to problems such as mental and lethargy.

In addition, the ventilation inside the closed shoe is not smooth, there is also a problem such as the growth of various bacteria, such as athlete's foot, the generation of odor.

Although many studies have been conducted to make up for such drawbacks, most efforts have been made to improve the shock absorbency and breathability by changing only the structure of the insole that directly contacts the wearer's foot. However, as described above, the insole is in direct contact with the foot. There is still a problem that its elasticity sharply decreases when used for a long time, and since the insole is not thick, the insole is facing a limit even if it is provided with a hole for improving ventilation.

Recently, attention has been focused on the midsole of shoes, for example, registration room No. 400116 "Shoe midsole with a buffer device", registration room No. 347799 "Shoe midsole with elastic band", registration room No. 401231 "shoes midsole Shock absorbing structure ", registration number 398041" shoe midsole "and the like have been disclosed.

Most of these disclosed technologies focus on improving the absorbency of the midsole instead of the insole, and impregnating various antibacterial and deodorizing substances inside the midsole to remove odors and suppress bacterial growth. have.

However, these disclosed grafts have only a simple bonding to the midsole or a relatively complicated type of elastic means, so the life span is short, and the elastic means are arranged in a form that does not conform to the foot or ergonomic aspects. It is a situation that a disadvantage that causes inconvenience to the wearer appears.

The present invention was created in view of the above-described problems of the conventional shoes as described above, by inserting a shock-resistant gel in accordance with the shape of the ergonomic foot on the heel portion and heel portion of the midsole constituting the shoe of the midsole Implement the shape, but by drilling a number of holes in the part to absorb the impact and at the same time breathable, and to process the insole to the shape corresponding to it, there is no elastic deformation during long-term use, without giving fatigue to the foot life of the midsole It is also a main object of the present invention to provide a shoe midsole and its manufacturing method which can be extended.

The present invention provides a shoe midsole interposed between the sole and the insole in order to achieve the above technical problem; A body that is cut to correspond to the shape of the foot, and a fixing hole is formed at a portion at which the heel is seated, and an insertion groove is formed at a portion at which the heel is seated; A main gel which is fixed by being press-fitted into the fixing hole of the body and formed of a gel upper plate which is convex upward, a gel lower plate which is convex downward, and a gel connecting plate connecting the gel upper plate and the gel lower plate; The technical feature is that the injection molding of the insertion groove of the body, providing a shoe midsole consisting of a subgel formed convexly upward.

At this time, the body is formed by spraying an antistatic agent, the main gel and the sub-gel is characterized in that a plurality of ventilation holes are formed to penetrate it up and down.

In addition, the main gel and the subgel is characterized in that the mixture of 94 to 96% by weight of polyurethane and 4 to 6% by weight of a molding accelerator is formed in a gel state.

In addition, the present invention, in order to achieve the above technical problem, a method for manufacturing a shoe midsole; Molding a polyester material, the main material for the midsole sprayed with an antistatic agent, to complete the midsole body; Cutting the completed midsole body to fit the shoe size, forming a fixing hole using a perforator, and forming an insertion groove using a milling machine; Inserting a body formed with a fixing hole and an insertion groove into a mold, and injecting a gel made of 94 to 96% by weight of polyurethane and 4 to 6% by weight of a molding accelerator, and simultaneously heating and pressing to form a subgel; There is also a technical feature to provide a shoe midsole manufacturing method consisting of the step of forcibly pressing the main gel prepared in the fixing hole of the molding is completed.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

1 is an exemplary perspective view of a shoe midsole according to the present invention, Figure 2 is an exploded perspective view of an exemplary shoe midsole according to the present invention, Figure 3 is an exemplary view showing a manufacturing process of a shoe midsole according to the present invention.

1 to 2, the shoe midsole 100 of the present invention is the main body (110), the main gel (210) that is inserted (Insert) or injected (Injecting) to the body 110 is integrated. And a sub gel 220.

At this time, the rear side of the body 110, that is, the fixing hole 120 is formed in the site where the load of the human body is intensively applied while the heel is supported, the side of the body 110, that is toe and the sole of the foot Insertion groove 130 is recessed in a portion where the curved protruding portion is supported while connecting the concave portion of the (heel).

In addition, the fixing hole 120 and the insertion groove 130, the main gel 210 and the sub-gel 220 described above is inserted (inserted fixed) or injected (injection molding), respectively, integral with the body 110 The main gel 210 is inserted and fixed, and the subgel 220 is most preferably injected.

Such injection molding method has not been implemented in the conventional shoe midsole manufacturing technology disclosed so far due to the difficulty of implementation and cost increase.

In particular, a plurality of ventilation holes 212 and 222 are formed in the main gel 210 and the sub gel 220 by penetrating them vertically.

The ventilation holes 212 and 222 allow the air between the insole and the sole of the shoe to communicate with each other so as to minimize the generation of moisture in the closed shoe.

Here, the main gel 210 and the subgel 220 according to the present invention, unlike the existing elastic material or shock absorbing material disclosed is a mixture made by mixing 4 ~ 6% by weight of the molding accelerator 4 to 6% by weight of polyurethane It is made in a gel state, and has excellent elastic return property, so that it has high impact absorption and low cost.

In this case, the molding accelerator is preferably a surfactant, such as a silicone surfactant or a fluorine surfactant may be.

In addition, when the polyurethane is added in an amount of 94% by weight or less, the amount of the molding accelerator is increased and the moldability decreases. When the polyurethane is added in an amount of 96% by weight or more, the amount of the molding accelerator is reduced, so that molding is difficult. It is preferable to.

In addition, in the case of the main gel 210, the gel upper plate 210a in contact with the insole, the gel lower plate 210b in contact with the sole, and the gel connecting plate 210c connecting them, in particular, the gel lower plate In the case of 210b, it is preferably formed to have a curved shape in an elliptical shape convex upward.

In addition, the gel connecting plate 210c is formed to have a length corresponding to the thickness of the body 110 of the midsole 100 so that the space between the gel upper plate 210a and the lower gel plate 210b is fixed to the fixing groove 120. It is preferable to zoom in such a way that the insert can be firmly fixed to the edge of the frame.

In addition, the protruding height of the main gel 210 and the sub-gel 220 should be designed according to the ergonomic characteristics to correspond to the shape of the foot. That is, they are processed to correspond to the shape of the sole of the foot, but the gel-type material, that is, the main gel 210 and the subgel 220 are accurately provided at the corresponding places so as to concentrate elastically the protruding parts of the sole. It is particularly desirable to implement so that.

On the other hand, the body 110 is preferably formed by compression molding by mixing the non-woven fabric and the fiction, polyester, etc. as before, but it is more preferable to have an antistatic function by including an antistatic agent further.

To this end, the antistatic agent may be a liquid such as ester (Esters), amines (Amine), organic salts (Organic Salts), preferably, the polyester when the main component of the midsole 100 is the yarn form It can be contained within 5 to 10% by weight of the yarn in the range that does not impair the function of the yarn in the form of spraying or impregnating an antistatic agent.

The manufacturing method of a shoe midsole according to the present invention having such a configuration will be described with reference to FIGS. 1 to 3.

As shown in Figure 3 (a), when the polyester material, the main material for the midsole containing the antistatic agent is molded into the material for the midsole body 310 through the molding machine 300, the upper surface of the material 310 The adhesive 320 is applied, and after fixing and fixing the sub-materials 330 such as an ear patch or a non-woven fabric, the roll 320 is passed through the roll 340 to complete the midsole body 110.

Subsequently, the completed midsole body 110 is cut to fit the shoe size, and the fixing hole 120 and the insertion groove 130 are formed in place of the cut midsole body 110.

Here, the fixing hole 120 is made by drilling through a perforator, the insertion groove 130 is formed by milling (milling) through a mill.

In this way, when the fixing hole 120 and the insertion groove 130 is formed in the body for the midsole 110 is formed by applying heat and pressure in the state in which the body for the midsole 110 is placed in the mold 400 and at the same time the gate ( 410 is injected into the gel (liquid) to be molded together.

At this time, the injection molding method of the gel into the insertion groove 130 of the body 110 is made in the state of making a groove by milling a part of the body 110 before injection molding to a certain depth.

When the molding is completed, the molded product is released and the molded product is released. In this case, the subgel 220 is injected into the insertion groove 130 to be integrated with the body 110.

At this time, although not shown, it will be obvious that the ventilation hole 222 is formed in the subgel 220 at the same time as the molding.

Subsequently, the fixing hole 120 is drilled in the rear side of the body 110 to fix the main gel 210, and when the fixing hole 120 is punched, the main gel 210 is press-fitted and inserted into the midsole. Complete 100.

Here, it is preferable to use an adhesive together when inserting the main gel 210.

As described in detail above, the present invention is provided in the form of insert or injection molding of a gel-type shock absorber in the midsole rather than the insole of the shoe, almost no elastic deterioration, so the service life is extended, the ergonomics corresponding to the foot shape The design adjusts the height of the gel to reduce fatigue even when worn for a long time, and provides the effect of preventing the static electricity with smooth ventilation.

Claims (4)

A shoe midsole interposed between an outsole and an insole to constitute a shoe; A body that is cut to correspond to the shape of the foot, and a fixing hole is formed at a portion at which the heel is seated, and an insertion groove is formed at a portion at which the heel is seated; A main gel which is fixed by being press-fitted into the fixing hole of the body and formed of a gel upper plate which is convex upward, a gel lower plate which is convex downward, and a gel connecting plate connecting the gel upper plate and the gel lower plate; Shoe midsole is injection molded into the insertion groove of the body, characterized in that consisting of a sub-gel convexly formed in the upward direction. The method according to claim 1; Shoe midsole is characterized in that the body contains an antistatic agent, the main gel and sub-gel penetrates it up and down to form a plurality of ventilation holes. The method according to claim 1; The main gel and the sub-gel is a shoe midsole characterized in that the mixture of 94 to 96% by weight of polyurethane, and 4 to 6% by weight of a molding accelerator is formed in a gel (Gel) state. A method of making a shoe midsole; Forming a polyester material, the main material for a midsole containing an antistatic agent, to complete the midsole body; Cutting the completed midsole body to fit the shoe size, forming a fixing hole using a perforator, and forming an insertion groove using a milling machine; Inserting a body having a fixing hole and an insertion groove into a mold and injecting a gel made of 94 to 96% by weight of polyurethane and 4 to 6% by weight of a molding accelerator into the insertion groove and simultaneously heating and pressing the molded gel to form a subgel; Shoe midsole manufacturing method characterized in that consisting of the step of forcing the main gel prepared in the fixing hole of the body is completed by pressing.

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