KR20020005878A - Molding method for manufacturing base plate of shoe having different hardness midsole and thereby apparatus - Google Patents

Abstract

PURPOSE: A middle sole of shoes formed with a side penetrating hole, and a manufacturing method thereof are provided to effectively distribute the shock and the loading to be transmitted from each region of the bottom of user's foot, and to improve the productivity thereof by reducing the generation rate of inferior goods. CONSTITUTION: The method for manufacturing the middle sole of shoes comprises the steps for preparing a middle sole material(40) made of foamed E.V.A. and formed with a side penetrating hole and a bottom recess; positioning a fixing member(50) having a shape corresponding to the shape of the penetrating hole into the penetrating hole; installing a cushion member in the bottom recess; making the middle sole by heating, compressing and quenching the middle sole material after locating in a mold; and removing the fixing member.

Description

Ivy shoe midsole with shock absorbing and cushioning function and internal perspective through side through hole and manufacturing method

The present invention relates to a shoe sole and a method for manufacturing the same, and more particularly, to a method for manufacturing a shoe sole made of Yves material having a plurality of unit cushioning members provided with a through hole on the side and for the distribution of impact and impact. .

Recently, many kinds of shoes with various designs have been manufactured due to improvement of living standards and various needs of consumers, and special shoes for each function are also released in various ways. However, it can be seen that shoes released in various kinds are similar in structure.

As shown in FIG. 1, a generally used shoe 1 is composed of a sole 2 and an upper 3 coupled to an upper portion of the sole 2. The sole 2 consists of an outsole 2a constituting the sole of the shoe and a midsole 2b constituting the midsole of the shoe. The outsole (2a) is made of a rubber material so as to meet the function for wear resistance and anti-slip, the midsole (2b) is made of a foam-molded structure of a synthetic resin material of various materials.

On the other hand, as the synthetic resin material used as the midsole (2b), foamed urethane-based, PV (C.V.C) or TPI (T.P.R) -based and YB-based (E.V.A) is mainly used. Among the materials of the midsole 2b, the foamed urethane system is easy to produce the midsole because the work is made in the liquid phase, but it is easily discolored after manufacturing and has a heavy disadvantage as well as environmental pollution, and the production is gradually reduced. In addition, the fibish or TIPS-based resin of the synthetic resin is also easy to manufacture, but is applied to only low-cost shoes due to the heavy and environmental hormones, the amount of use is also gradually decreasing.

Therefore, in recent years, when the weight of the entire shoe is light and shocked, it is resilient to absorb shock and prevents discoloration and prevents environmental pollution. Mainly used. EVA foam layer midsole (2b) used to expand and expand as described above is different from the rubber forming the outsole (2a), and the material is different, and the production method is different, and is usually produced separately and the bottom surface of the midsole (2b) The sole 2 is attached to the outsole 2a to produce the sole 2. Therefore, due to the separate work of the outsole (2a) and the midsole (2b) there is a problem that the production cost of the sole made of Yves midsole (2b) increases.

On the other hand, according to the change of the times, day by day, the types of shoes are also diversified, and various materials are being developed to perform unique functions. For example, the midsole 2b, which is a midsole, should not only have excellent shock absorbing and restoring force in order to reduce the shock transmitted to the human body when landing on the ground, but also has a light weight in order to reduce fatigue on the foot when worn for a long time. Should. Therefore, the development of various materials capable of performing these functions is being made as well as inserting a separate member to perform these functions. Representative cases can be seen that the air bag is embedded, various members such as air bags have become an essential item for shoes requiring high performance.

In order to install a separate member such as an air bag in the midsole 2b, it is relatively easily performed in the midsole 2b using a polyurethane material. That is, since the urethane material uses a liquid phase, the airbag may be installed in a mold, and then the airbag may be installed or post-processed in the midsole as the liquid is injected and cured. As described above, the materials themselves There are many problems due to the limitations. That is, in the case of polyurethane, the air bag is easy to install, while the weight of the material itself is not only heavy, but the amount of use is gradually decreasing due to the emission of pollutants. In addition, the use of fibish and TIPS material is limited due to the problem of the release of environmental hormones.

In contrast, the foamed midsole (2b) made of EVA material is widely used due to the superiority of the material, but unlike the above material, since the midsole is manufactured by pressurization, heat forming, or injection foam expansion of a solid material, a separate material such as an airbag is used. There is a problem in that the member is not easily exposed to the outside while being co-molded by inserting the member into the EVA material itself.

Looking at the installation of a separate member such as an air bag in the EVA material, when manufacturing the EVA midsole is formed by forming a pre-made midsole inside the midsole material, the space for the air bag will be built, and then by inserting the airbag to bond, While the midsole has a much lighter advantage than the polyurethane foam layer, it is difficult to manufacture and also has a problem in that the cost increases due to the high cumbersome and poor adhesion rate through various processes. In addition, the midsole made of E.V.A material has a spring or liquid bag instead of an air bag, but it is not only difficult to manufacture, but also has a heavy weight and is not practically used.

And the main function of the midsole is different for each site. In other words, the central part where the sole is in contact with the foot should be excellent in shock absorption and restoring force, while the rim should support the shape of the shoe itself and should be relatively firm. However, the midsole currently manufactured has a problem in that the physical properties of the rim and the central portion are all the same, and thus cannot perform a unique function of the shoe.

In addition, the current airbag is made of a whole and formed only in part, so that the impact and load generated in each part of the sole are not easily distributed evenly, and the price thereof is expensive.

In order to solve this problem, according to my prior application (Domestic Patent Application Nos. 2000-16697, 2000-16699), it simply shows a shoe sole that can be recognized from the outside with a cushion function in the Yves midsole.

As shown in FIG. 2, according to the present invention, the protrusion 22 is formed inside the mold 20, and the through hole 12 formed in the rim midsole 10 is inserted into the protrusion 22 to press the press. The process is performed to form a through hole 12 that can be recognized from the outside. However, the above-mentioned prior application solves many problems of the related art, but has the following problems.

First, it is difficult to insert the through-hole 12 of the rim midsole 10 into the projection 22 formed on the inner surface of the mold 10, and after the pressing process, after the completion of the midsole, the penetration through the projection 22 It is difficult to pull out the ball 12, there is a problem that the work efficiency is lowered.

In addition, since the forcing is pulled out during the extraction process, the periphery of the through hole 12 is torn and there is a problem in that a defect is increased.

And, above all, there is a problem that the midsole portion located on the lower surface of the protrusion 22 is not sufficiently compressed in the pressing process. That is, since the protrusion 22 is fixed on the mold 20, the pressure due to pressing is applied to the upper surface of the protrusion 22, but the protrusion 22 is blocked by the protrusion 22 so that the protrusion 22 is lowered. The part is not compressed enough, there is a problem that the molding failure rate of the midsole produced accordingly increases.

In addition, since the projection itself is fixed to the inner wall of the mold, there is a problem in that the cumbersome and repair cost of changing the projection position every time the shape and position of the through hole is changed is added.

Therefore, the present invention is to solve the above problems, the through-hole that can be seen is formed on the side, a plurality of cushioning members are installed therein has a cushioning function to effectively distribute the impact and load transmitted from each part of the sole The purpose of the present invention is to provide a shoe midsole made of Yves.

It is another object of the present invention to provide a method for manufacturing shoe soles of Yves material with improved productivity due to simpler installation of the cushion member on the midsole of Yves material and no defect rate.

In addition, the present invention is to provide a Y E midsole and a method of manufacturing the same to provide a high functionality at an affordable price by increasing the cushioning function of the entire midsole by using a unit air bag of various sizes, and improved productivity as well as material saving There is another purpose.

1-shows the appearance of a typical shoe.

Figure 2 is a view showing a state for forming a through-hole in the conventional midsole border.

Figure 3 shows a midsole material according to the invention.

4-a view showing a fixing member and a cushioning member according to the present invention.

Figure 5 shows a manufacturing process of the midsole according to an embodiment of the present invention.

Figures 6-5 show midsoles produced by the examples.

Figure 7 shows a manufacturing process of the midsole according to a second embodiment of the present invention.

Figures 8-7 show the midsole produced by the examples.

Figure 9 shows a manufacturing process of the midsole according to a third embodiment of the present invention.

Figures 10-9 show the midsole produced by the examples.

* Explanation of symbols for the main parts of the drawings *

40,40 '; Midsole material 42: border midsole material

42a; Through hole 44: center midsole material

46: groove 50: fixing material

60: cushion member 62: cylindrical airbag

64: plate air bag 100: mold

The present invention for achieving the above object is a process for preparing a midsole material made of a foamed E.V.A material having a predetermined through-hole through both sides, the bottom surface is provided with a plurality of cushion forming portion; Positioning a fixing material corresponding to the shape of the through hole in the through hole; Installing a cushion member in the cushion forming unit; Placing the midsole material on which the fixing member and the cushioning member are installed on a mold, and quenching the high temperature after pressing and heating to form a midsole; And a process of removing the fixing material; There is a technical gist of the present invention to provide a method for manufacturing shoe soles made of Yves material having an inner perspective through the through hole, and a cushioning member that contracts and expands due to an impact and a load applied thereto.

And, the midsole material is made of EVA material, the through-hole is formed on the side of the inner periphery is formed, the center portion is provided with a cushion forming portion consisting of a plurality of grooves to be made of the same internal and external properties, Alternatively, the midsole material may include an edge material made of Eve (EVA) material and having a through hole formed therein to the side and forming an outer support portion; And it is made of Yves material, has a hardness that is softer than the rim midsole material, a plurality of cushion forming portion is formed and is located in the center portion of the rim midsole material;

Preferably, the cushion forming portion is formed of a plurality of cylindrical grooves formed on the bottom surface in contact with the sole, the cushion member is formed to correspond to the shape of the groove portion to be made of a cylindrical air bag is inserted or installed, the cushion forming portion And a plate-shaped groove formed in a midsole portion corresponding to both rear through-hole sides of the rear side, and a plurality of cylindrical grooves formed in the front side, wherein the cushion member has both end faces corresponding to the inner surface of each through-hole in the plate-shaped groove portion. It is to be made of a plate-shaped air bag to be installed, and a cylindrical air bag inserted into the cylindrical groove.

On the other hand, according to a second aspect of the present invention, Yves Y midsole made of a material; A through hole formed at both rear sides of the midsole and having an internal perspective; A rear cushion member formed on a plurality of grooves formed on the sole surface between the through holes, the rear cushion member comprising a plurality of cylindrical air bags for impact and load distribution applied thereto; and a plurality of grooves formed on the front surface of the sole, And a front cushion member comprising a plurality of cylindrical airbags for impact and load distribution.

Preferably, the midsole is made of a single material having the same internal and external physical properties, or the midsole is made of an EVA material, and a through hole is formed on the side of the rim midsole to form an outer support part. material; And it is made of Yves material, the center midsole material having a softer hardness than the rim midsole material;

Therefore, according to the present invention, the installation of the cushion member for performing the cushion function in the Yves shoe material and the through-hole that can be recognized from the outside is formed to maintain the high functionality of the shoe midsole, while simultaneously forming a high-performance Yves shoe midsole The production cost is reduced by making it cheaper.

Hereinafter will be described in detail with reference to the drawings showing a preferred embodiment of the shoe midsole manufacturing method of Yves material according to the present invention having the configuration as described above.

First, the midsole material forming the midsole used in the present invention will be described with reference to FIG. 3.

First, the midsole material 40 used in the present invention is largely made of two kinds. First, the midsole material 40 having the same internal and external physical properties is used. The midsole material 40 may be prepared by cutting and skiving the foam-molded Yves midsole material 40, or may use a preform that is widely used recently. Second, a midsole material 40 'made of a rim midsole material 42' and a central midsole material 44 'is used so that the physical properties of the inside and the outside forming the midsole are different from each other. The midsole material 40 ′ may be more faithful to the function of the midsole due to different internal and external physical properties.

First, a case in which the inner and outer physical properties are the same and made of one material will be described with reference to FIGS. 3 (1) and (2).

As shown, the processed midsole material 40 of this material is prepared by foam molding in the same manner as the conventional one and about 1.3 to 1.5 times larger than the desired shape. Side processed holes 42a are formed in the processed material. The through holes 42a may be variously formed along the edges of the midsole, such as the rear both sides or the front both sides. This is to make it recognizable. Then, the groove 46 of various forms is formed in each bottom portion of the midsole where the sole is in contact. The groove 46 is provided with a cushion member to be described later to allow the entire sole of the sole to perform the cushion function. The groove 46 is changed in shape depending on the cushion member is installed, it may be configured in various ways. For example, in the case of (1) of FIG. 3, a groove 46 having a similar shape is formed so that the cylindrical airbag can be installed as a cushioning member. In the case of (2) of Figure 3, the rear portion is formed with a groove portion 46 'through which the upper and lower surfaces are opened, and the groove portion 46 in which the cylindrical airbag can be installed is formed in the front portion. In the rear part, an upper plate 46a 'and a lower plate 46a "made of Yves material are separately provided, and an air bag is used as a cushioning member between the upper plate 46a' and the lower plate 46a". It will be described in detail in each embodiment to be described later.

Secondly, the midsole material 40 'is composed of two types: a rim midsole material 42' and a central midsole material 44 '. As shown in (3) and (4) of FIG. 3, the rim midsole material 42 'is generally composed of a foamable EVA base compound to cut a solid foamed sponge sheet previously foamed. It is formed in the outer shape of the rounded shoes to be formed along the rim of the shoe, the size of the rim midsole material 42 'is prepared to be about 1.3 to 1.5 times larger than the desired dimensions, which is the rim midsole material (42) ') Is compressed in the mold so that the desired dimensions and outer hardness can be formed. That is, since the rim midsole material 42 'is foamed and expanded, the hardness is maintained at about 35 to 40. When the rim midsole material 42' is compression-molded again in the mold, the volume is reduced and the hardness is weak. Change to 50 to 55 to maintain sufficient strength. Therefore, the rim midsole, which acts as the outer edge of the shoe, is press-molded to maintain such support strength, so that the rim midsole material 42 'is cut slightly larger. On the other hand, the through hole 42a is formed in the rim midsole material 42 '. The through hole 42a is a portion to be recognized from the outside when the cushioning member described below is installed, and a fixing material is inserted into the through hole in the shape of the fixing member.

Next, the central midsole material 44 'will be described. The central midsole material 44 'has a slightly softer hardness than the above-described edge midsole material 42', and is made of the same material by combining with good physical properties. This is because the central midsole material 44 'forms the part where the sole touches, so that the shock absorbing function can be sufficiently exhibited, the restoring force is excellent, and the specific gravity is low to lighten the weight of the midsole. Since the central midsole material 44 'having a somewhat soft hardness is well blended with synthetic rubber and natural rubber, it may be configured with various hardness by adjusting the mixing of the foam. In addition, the central midsole material 44 forms various groove portions 46 as described above, and the cushion member is installed in the groove portion 46 so that the entire surface where the sole touches can perform the cushion function. On the other hand, when the groove 46 is formed, the upper portion of the rear portion is removed by the space 46c in which the air bag is to be installed, as in the case of (3) of FIG. As in the case of (4), the pouch may be installed on the plate with the groove 46c removed. These various embodiments will be described later.

On the other hand, as described above, when the through-hole 42a is formed, it should be provided so that various cushioning members 60 can be installed in the portion visible through the through-hole 42a. Therefore, as shown in Figure 4, a variety of members for forming the cushion member 60 is required. The most common of these members may be the airbags 62 and 64 separately prepared in advance, so that the central midsole material 44 may have a cushion function.

In addition, a fixing member 50 for fixing the through hole 42a is required. The fixing member 50 is for preventing the deformation of the through hole 42a when the midsole material is press-formed by pressing and press-molded, and has a strength that is not deformed by pressing. It is produced by processing copper or aluminum. In other words, after the fixing member 42a having a shape corresponding to the shape of the through hole 42a is inserted into the through hole, the fixing member 50 is pressed despite the pressing against the press by pressing the midsole materials 40 and 40 '. The through hole 42a can be maintained as it is.

Next, a method of manufacturing a shoe midsole using the midsole materials 40 and 40 ', the cushion member 60, and the fixing member 50 as described above will be described in detail with reference to the drawings.

First embodiment

(1) Midsole Material

As shown in FIG. 5, a midsole material 40 is prepared. The midsole material 40 may be manufactured by cutting a conventional plate-like material and skiving, and may be formed in a preform form by injection injection that has recently been manufactured.

(2) Formation of through hole and groove

The bottom surface of the midsole in contact with the sole of the foot so that the groove 46 of various forms is formed. The groove 46 is largely made in two parts, the rear part and the front part of the midsole. This is because the shock absorption and load distribution of the midsole are mainly performed in the two parts.

Looking at the groove 46a of the rear portion, a plurality of grooves are formed in the horizontal direction. The groove portion may be formed in the longitudinal direction. Then, both sides of the groove portion 46a are drilled to form the through holes 42a. The through hole 42a is recognizable from the outside to the inside, and is formed in various shapes in the same form as that externally recognizable when installing a conventional airbag.

On the other hand, a plurality of grooves 46b are formed in the front part separately from the rear part. The size and shape of the groove portion 46b can be arbitrarily configured, and preferably, the groove portion is formed around the site where the impact and load are concentrated in the human body structure. For example, the big toe portion, it is good to be formed such as in contact with the instep surface. Alternatively, the groove may be formed at a portion where the recessed groove of the sole is formed. The groove 46b may have a pressure effect by varying the shape of the cushion member to be described later rather than impact and load distribution.

(2) Fixing material and cushion member installation

As described above, the fixing member 50 and the cushion member 60 are installed in the midsole material 40 having the through hole 42a and the groove 46 formed therein. First, the fixing member 50 is made of a shape corresponding to the through hole 42a, and is prepared using a material having a predetermined hardness or more so that no change occurs in pressure and temperature caused by the outside. For example, it is produced by processing aluminum or copper metal, or manufactured using a silicone synthetic resin material. Therefore, when the fixing member 50 is fitted in the through hole 42a, the through hole 42a can be maintained without changing its size and shape.

Next, the cushion member 60 is installed in the groove 46. The cushion member 60 may be used in various ways as a member for distributing the impact and the load applied thereto, and in this embodiment, the cylindrical airbag 62 will be described. As shown in the drawing, a plurality of airbags 62 having a cylindrical shape are prepared. By manufacturing the airbag 62 in the form of a plurality of cylinders as described above, the material can be provided in a low cost and high productivity unlike the conventional, it can also be made light and shock and load distribution effectively. That is, in the related art, the airbag is made in one shape as a whole, and its manufacturing cost is expensive. If any one side is damaged, the entire gas is released and its function is lost, whereas in the present embodiment, the manufacturing cost is made of a simple cylindrical structure. Even if a large number is used, since it does not reach the price of 1/5 of the conventional airbag, there is an advantage in that it is inexpensive. In addition, the conventional airbag has a small practical effect by performing the role of impact and load distribution as a whole, whereas in the present embodiment, a plurality of airbags are built by adjusting the amount of gas injected according to the position where the impact load is applied. By distributing the loads individually, a sufficient effect can be obtained.

(3) Midsole manufacturing

The midsole material 40 provided with the fixing member 50 and the cushioning member 60 described above is placed in the mold 100, the upper mold is covered, and a pressing process is performed. In more detail, after placing the mold between the upper plate and the lower plate of the press (a) in which high heat and cooling water is transferred, pressure and heat transfer are performed through the upper and lower surfaces of the mold 100. At this time, the applied pressure is about 50kgf / cm 3 ~ 70kgf / cm 3 and the temperature is about 140 ~ 160 ℃. The midsole material 40 is deformed by the applied pressure and temperature to form a compression molded midsole.

The process will be described in more detail. Deformation occurs in the midsole material 40 located inside the mold 100 due to the pressure and temperature applied thereto. That is, the midsole material 40 is expanded again by high temperature by the pressure and the temperature applied, and then compressed to form the outer surface of the midsole by being in close contact with each of the delicate engraving surfaces of the midsole forming portion. 40) maintains a hardness of about 35 to 40, but the compressed midsole maintains a hardness of about 50 to 55. In addition, since the fixing member 50 is positioned in the through hole 42a of the midsole 40, the shape of the midsole 40 can be maintained without deformation even when the pressure is applied to the press. Therefore, after the midsole is manufactured, the shape of the through hole 42a is maintained without deformation in the state where the fixing material 50 is removed, thereby serving as an outer window, and using the fixing material 50 without a protruding jaw in the mold. As a result, the productivity is improved as well as the formation of the through hole 42a becomes clear, so that there is almost no defect.

On the other hand, the central portion of the midsole material 40 pressed by the upper mold is also compressed to form the desired midsole central portion. At this time, the airbag 62, which is the cushion member 60, is also deformed by the pressure and the temperature applied. That is, gas is contained in the airbag 62, and the outer surface is usually made of polyurethane, and the expansion is performed by the temperature of 140 to 160 ° C applied by the press (a), but by the press (a) Receives the opposite force of the expansion suppression due to the pressure applied. However, the cushion member 60 is installed in the groove 46, and the groove around the groove 46 is made of a midsole material that is expanded by high heat, so that the midsole material is expanded again by the applied temperature and pressure. Wrap the cushion member (60). Therefore, the cushion member 60 is prevented from expanding any more, so that the heated cushion member 60, which is heated in the space, has almost no pressure applied to the surroundings. Accordingly, there is no change in the pressure and temperature applied by the press 100 while being wrapped in the midsole material around the groove 46. That is, even when high temperature and high pressure are applied while the airbag 62 itself is embedded in the groove 46, the midsole material does not have enough inflation force to fill the groove 46, and the airbag 62 itself does not expand much larger than the groove. . At this time, the contact surface of the midsole material in contact with the surface of the cushion member 60 is applied in advance by applying a hot melt adhesive to be bonded by high heat. The midsole material in the center portion is compressed by the airbag 62 with the cushion member 60 embedded therein by the temperature and the pressure, thereby forming a shape as shown in FIG.

(4) Manufacture of midsole by removing fixing material

After the midsole is manufactured by heat, pressurization and quenching, the press (a) pressure is released and the upper mold is removed, and then the fixing member 50 is removed. Accordingly, the shape of the through hole 42a is maintained at the side surface of the midsole. The surface of the cushion member 60, which is in close contact with the surface of the fixing member 50, is exposed to the outside to maintain the shape as shown in FIG. 5. When the load is removed, the original member recovers and performs a role of the cushion member 60 which again blocks the impact. Through this through-hole can be recognized from the outside, it is possible to perform the same function with the same shape as shown in the airbag built-in shoes manufactured by a conventional polyurethane transparent sheet.

In addition, the groove portion 46 is provided with a cushion member 60 composed of a plurality of cylindrical airbags 62 so that the cushion member 60 can individually perform the impact and load distribution applied to each side of the sole. do. In addition, in the present embodiment, each cylindrical airbag 62 is individually positioned and separately prepared to have a variety of configurations by adjusting the pressure of the injected gas while the function is performed separately, so that it is possible to disperse and place in each suitable position, impact and Load distribution can be performed more effectively.

Second embodiment

Figure 7 is a view showing an embodiment of the shoe midsole manufacturing according to the present invention. This will be described with reference to the drawings.

(1) Preparation of edge midsole material and installation of fixing material

As shown, first, the edge midsole material 42, which is formed to be about 1.3 times larger than the size of the window than the desired shape, and has a through hole 42a, is separately prepared. The rim midsole 42 material is to cut the sponge sheet made of YV basic compound to have a thickness of about 7mm to 9mm. In addition, the fixing member 50 corresponding to the size and shape of the through hole 42a may be separately manufactured and the fixing member 50 may be installed in the through hole 42a.

(3) installation of central midsole material

After the rim midsole material 42 is installed, a central midsole material 44 for forming the cushion member 60 is provided. That is, the center midsole material 44, which is manufactured separately first and has better impact absorption and restoring force than the edge midsole material 42, and has a differentiated hardness, is forcibly pushed into the center portion of the edge midsole material 42, and thus the edge midsole material. And (42). Preferably, the central midsole material 44 is made of a foamed EVA composite resin plate having a lower hardness and a lower specific gravity than the rim midsole material 42. The central midsole material 44 is a shock absorbing part as the sole of the sole. The cushion function is provided to reduce the weight of the midsole while giving the difference in hardness of the front and rear axles to reduce the weight of the entire shoe.

In addition, the center midsole material 44 is provided with a cushion member 60, the mounting of the cushion member 60 can be configured in various ways.

First, a plurality of grooves 46 may be formed in advance in the same form as described above in the first embodiment, and the configuration may be possible due to the installation of the cylindrical airbag 62 in the grooves 46. Do.

In the present embodiment, as shown in Figures 7 and 8, the rear portion of the central midsole material 44 is not a complete form, but a form in which a portion is removed. The central midsole material 44 corresponding to the portion where the through hole 42a is formed is provided with a conventional airbag 64 on the plate, so that the central midsole material 44 is installed as much as the portion where the airbag 64 is installed on the plate. The central midsole material 44 is prepared in a state in which) is removed. At this time, if the midsole material 44 is not removed at the position where the airbag 64 is to be installed on the plate, the midsole material 44 expands due to the high heat and pressure of the molding, and the heated airbag 64 is damaged. And the physical properties of the center midsole material 44 itself, as described above, need to be prepared to have a softer hardness than the rim midsole material 42.

Meanwhile, as shown in FIG. 9, the central midsole material 44 is composed of two of the lower plate 44a and the upper plate 44b, and the plate-shaped airbag is disposed between the upper plate 44b and the lower plate 44a. It can also be manufactured by positioning 64. Of course, even in this case, the lower plate 44a and the upper plate 44b of the portion where the airbag 64 is located will have to be adjusted to have a different thickness than other portions. This is because, as described above, the thickness should be adjusted as much as the space in which the airbag 64 is installed on the plate. In addition, in each of the above examples, a hot melt adhesive must be applied after the pretreatment to the airbag 64 portion that is in contact with the central midsole material 44 for firm adhesion of the airbag.

And, unlike the above, the midsole material of FIG. That is, the airbag 64 is provided on the plate between the lower plate 46a "and the upper plate 46a" in the groove part 46 'whose upper and lower sides are opened. In this case, unlike FIG. 9, it shows the case which consists of one midsole material.

As described above, the cushion member 60 is installed on the rear of the center midsole by a conventional air bag 64, and a plurality of grooves 46 are formed in the front portion to install a cylindrical air bag 62, thereby providing a midsole. Ensure even shock and load distribution throughout. Of course, the airbag 64 may be installed on the plate as described above, of course.

(4) Midsole manufacturing

The pressing process is performed by covering the upper mold in a state where the fixing member 50 and the cushion member 60 are installed in the midsole material 40 'as described above. Since the midsole manufacturing process by the pressing operation is the same as the first embodiment described above, a detailed description thereof will be omitted. However, in the present embodiment, the finished midsole is different from the hardness of the rim midsole and the center midsole, and thus the high functionality can be maintained by the outer hard hardness and the slightly soft inner hardness. In other words, the outer side is a solid local area and the inner side functions as a shock and load.

As shown in the above description, it can be seen that the above-described embodiment has its characteristics in order to make the most of the impact and load distribution, which are inherently functions of the midsole. On the other hand, the present invention can be made of a midsole in a variety of ways in addition to the above embodiment, a feature of the present invention is characterized in that the installation of a variety of cushioning members, such as airbags in the midsole of Yves material, in addition to the above embodiment It will be appreciated that various applications are possible and it will be apparent to those skilled in the art that the present embodiments do not limit the invention.

And the present invention can be applied in various ways. For example, in the case of the midsole material made of a single material may be manufactured in the form of a sandal with a cushion member consisting of a plurality of cylindrical air bags, in this case the cushion member by the cylindrical air bag is recognizable from the outside, Through the side through-holes, the role of the cushioning member by the internal perspective can be visually confirmed.

On the other hand, the above description has been described as a midsole, which means that the rubber material, which is generally the sole of the present invention, can be attached to the window, but is not limited to the midsole. That is, if a separate rubber material is not attached to the bottom is a concept including the outsole. Although the present invention has been described through some embodiments, it can be seen that there are various modifications by the technical idea of the present invention, which will be apparent to those skilled in the art.

As described above, according to the present invention, by forming the side through-hole in the sole made of the Yves material, and by installing the various types of cushion member on the bottom surface can perform the cushion function, which is a unique function of the midsole itself more efficiently. It has a visually identifiable effect.

In addition, since it is possible to form a plurality of cushion members of various forms in various parts, there is another effect that can provide Yves midsole having high functionality to perform impact and load distribution more efficiently.

In addition, since the central midsole is made of a high foaming low specific gravity material, it is possible to reduce the weight of the midsole, and cost reduction is achieved by using a plurality of cylindrical airbags, there is another effect that the manufacturing cost of the midsole is cheaper.

On the other hand, the present invention can use the mold as it is conventional, and can produce a shoe sole having a variety of shapes according to the shape of the fixing member and the shape and position of the through-hole, so that the effect of producing a variety of midsole having a variety of designs at low cost have.

Claims (8)

Preparing a midsole material made of a foamed E.V.A material having a predetermined through-hole provided on both sides thereof and having a plurality of cushion forming portions at the bottom thereof; Positioning a fixing material corresponding to the shape of the through hole in the through hole; Installing a cushion member in the cushion forming unit; Placing the midsole material on which the fixing member and the cushioning member are installed on a mold, and quenching the high temperature after pressing and heating to form a midsole; And Removing the fixing material; The internal perspective through the through hole is made, the shock absorbing and cushioning function is provided, characterized in that the cushion member is expanded and contracted by the impact applied and the load is provided, the eve of the internal perspective through the through hole of the side Shoe midsole manufacturing method of this material. The method of claim 1, The midsole material is made of Eve (EVA) material, the through-hole is formed on the side of the inner periphery, the center portion is provided with a cushion forming portion consisting of a plurality of grooves, the impact characterized in that the inner and outer A shoe midsole manufacturing method of the Yves material provided with the absorption and cushioning function and the internal perspective through the through-hole of the side. The method of claim 1, The midsole material, A rim midsole material formed of E.V.A material and having a through hole formed at an inner side thereof and forming an outer support portion; And A shock absorber, characterized in that made of Yves material, having a softer hardness than the rim midsole material, a plurality of cushion forming portion is formed and located in the center portion of the rim midsole material to contact the sole surface; A method for manufacturing shoe soles with Yves material provided with a cushioning function and an internal perspective through through-holes on the side. The method according to any one of claims 1 to 3, The cushion forming portion is composed of a plurality of cylindrical grooves formed on the bottom surface in contact with the sole, the cushion member is formed to correspond to the shape of the groove portion shock absorption and cushioning function characterized in that made of a cylindrical airbag installed A shoe sole manufacturing method of Yves this material is provided and the internal perspective through the through-hole of the side. The method according to any one of claims 1 to 3, The cushion forming portion is formed of a plate-shaped groove formed in the midsole portion corresponding between the rear through-hole side, and a plurality of cylindrical grooves formed in the front, The cushion member is provided with a shock absorbing and cushioning function, characterized in that the plate-shaped groove is formed of a plate-shaped air bag is installed so that both end faces are matched to the inner surface of each through hole, and a cylindrical air bag inserted into the cylindrical groove. How to make a shoe midsole made of YEVEI material, through which the internal perspective through the through hole in the side. A midsole made of Eve Y material; A through hole formed at both rear sides of the midsole and having an internal perspective; A rear cushion member installed in a plurality of grooves formed on the sole surface between the through holes, the rear cushion member comprising a plurality of cylindrical airbags for impact and load distribution; It is installed in a plurality of grooves formed on the front surface of the sole, the front cushion member consisting of a plurality of cylindrical airbags for the impact and load distribution applied to the shock absorbing and cushioning function, characterized in that consisting of the through-hole Eve midi shoe midsole through which the internal perspective is made. The method of claim 6, The midsole is provided with a shock absorbing and cushioning function, characterized in that the inner and outer physical properties are made of the same material and the inner sole through the through hole of the side is made of Yves material. The method of claim 7, wherein The midsole, A rim midsole material formed of E.V.A material and having a through hole formed at an inner side thereof and forming an outer support portion; And Eve mide is made of a material, the center midsole material having a hardness that is softer than the rim midsole material; is provided with a shock absorbing and cushioning function, characterized in that the inner sole through the through hole of the side .