KR100367847B1 - Molding method for manufacturing base plate of shoe and thereby apparatus - Google Patents

Abstract

PURPOSE: Provided is a method and a mold for producing shoe sole, by which it is possible to form a midsole and an outsole simply in a single mold and conduct adhesion without decolorization at the boundary line. CONSTITUTION: The method includes a first step of placing a material for an outsole(200) having a plurality of pores on a mold for an outsole mold provided with groove(114) and air passage(116); a second step of injecting a material for a midsole(300) comprising foamed E.V.A having a size greater than a mold for a midsole(120,130), followed by stacking the molds; a third step of placing the molds on a press and applying a predetermined pressure and heat, followed by rapidly cooling to adhere the midsole and the outsole; a forth step of removing the formed shoe sole, followed by cutting the margin at the boundary line between the midsole and the outsole.

Description

Shoe sole manufacturing method and outsole manufacturing mold {MOLDING METHOD FOR MANUFACTURING BASE PLATE OF SHOE AND THEREBY APPARATUS}

The present invention relates to a shoe sole manufacturing method and a shoe sole manufacturing mold, and more specifically, the midsole and the outsole of the shoe is integrally molded and bonded at the same time to shorten the manufacturing process of the sole to improve the productivity and mold production cost and sole manufacturing The present invention relates to a shoe sole manufacturing method and a mold for reducing the cost.

Recently, due to the improvement of living standards and the various desires of the consumer, it is manufactured in numerous kinds of shoes with various designs, 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, 3 and an upper 4 coupled to an upper portion of the sole 2, 3. The soles 2 and 3 consist of an outsole 3 which forms the sole of the shoe and a midsole 2 which usually forms the sole of the shoe. The outsole (3) is made of a rubber material so as to meet the function for wear resistance and anti-slip, and the midsole (2) to reduce the weight of the entire shoe to absorb the impact when light and shocking to ensure resilience It is mainly used to expand and expand the synthetic resin material.

The outsole (3) and the midsole (2) forming the sole as described above is different from the material and the production method is different, usually produced separately so that the outsole (3) is attached to the bottom of the midsole (2) to produce the sole. If briefly described below.

First, the manufacturing process of the midsole (2) will be described. In general, a mid-sole material is formed by skiving, cutting, and grinding a solid plate-shaped sponge sheet previously foamed with a foamable EVA base compound, and the desired midsole material is desired. It is injected into the aluminum mold having a shape and is applied at high temperature and high pressure and then rapidly cooled to form the midsole 2. In the production of the midsole (2), after maintaining the midsole material at a high temperature, high pressure, the rapid cooling because the mold can withstand high pressure, and also must be heated and cooled at a high temperature so that the heat transfer to the midsole material can be made well Since it is made of a material, it is usually manufactured using a light and hard aluminum mold.

The midsole (2) after the process is introduced into the contact preparation process with the outsole (3), the foreign matter is removed through a dipping (about 1 minute to 1 minute 30 seconds) process. When the dipping is completed, the U.V irradiation (ultra violet irradiation) is performed to improve the adhesive strength with the outsole (3) in contact after the drying process at room temperature. At this time, the midsole 2 is usually coated with a solution such as a U.V primer to improve adhesion, and then evenly irradiates U.V on the bottom of the midsole 2 and the top of the outsole 3. As described above, the midsole 2 after the U.V irradiation is transferred to the next process, that is, the bonding process with the outsole 3.

In addition, the outsole 3 adhered to the bottom of the midsole 2 is manufactured separately. In more detail, the outsole 3 is usually made of rubber, in order for the main function of the outsole 3 to be non-slip, wear-resistant, and to improve landing ability with the ground. Natural rubber, synthetic rubber and chemicals are mixed at an appropriate mixing ratio to produce a plate-shaped uncured rubber material that is cut to a certain size through a rolling process. The non-vulcanized rubber material is introduced into the outsole mold made of ferrous metal to manufacture the outsole 3. The outsole mold is composed of a lower mold and an upper mold, and an outsole forming portion formed with a predetermined size and a pattern is engraved in the lower mold, so that the plate-shaped unvulcanized rubber is used as an outsole material in the outsole forming portion of the lower mold. By applying a constant pressure and a high temperature by inputting the material, the bottom surface of the plate-shaped unvulcanized rubber material is duplicated to produce a vulcanized outsole 3.

After producing the midsole (2) and the outsole (3), respectively, as described above, through the manufacturing process as follows to form a sole.

First, in order to increase the adhesion efficiency of the midsole (2) and the outsole (3) by using a mechanism commonly called buffing (buffing M / C), the top contact surface of the outsole is roughened to be rough. When the pad is completed, the midsole (2) and the outsole (3) is subjected to a separate pre-treatment for about 5 minutes to dry separately.

When the drying process is completed, the adhesive solvent is first applied to the adhesive surfaces of the midsole 2 and the outsole 3 and dried for about 7 minutes, and then the adhesive solvent is applied again to dry the secondary solvent. After the drying process, the soles of the midsole 2 and the outsole 3 are bonded to each other and pressed using various kinds of presses to improve the adhesion of the adhesive surfaces.

The conventional sole manufacturing process that went through the above process has the following problems. Since the midsole (2) and the outsole (3) are separately manufactured and adhered to each other, the midsole mold and the outsole mold are separately required, and the mold manufacturing cost is excessively consumed. There is a problem that the production cost of the sole is increased due to.

In addition, during the dipping process such as toluene, U.V irradiation process, pucking process, etc., there is a problem that the product which becomes defective in each process leads to the defect of the entire sole and the defective rate is quite high.

In order to improve the above problems, a manufacturing process for simultaneously forming the midsole (2) and the outsole (3) was indispensable, and a manufacturing method for simultaneously forming the midsole and the outsole has been previously filed. That is, Korean Patent Application Nos. 94-19774 and 94-19775 describe a manufacturing method for integrally forming a midsole and an outsole at the same time, and briefly described with reference to FIGS. Shall be.

First, the midsole 34 forms a midsole material through a process of cutting, skiving and grinding the E.V.A sponge sheet as in the prior art. The outsole material made of a rubber material is mixed with raw rubber and chemicals to form an unvulcanized plate-like sheet through a rolling process, and the process up to this point is the same as in the prior art. The unvulcanized rubber sheet is cut to the same dimensions as the midsole material. By injecting the cut midsole material and the outsole material into the mold and simultaneously performing the pressing operation, the midsole 34 and the outsole 32 are adhered to each other, and the sole manufacturing is completed. The pressure applied to 10) is 50 kg / cm 2 or more, and is produced by pressure molding at about 150 ° C. for 7 to 10 minutes. Thus, the unvulcanized outsole material is vulcanized during the pressing process, and attached to the midsole 34 with a predetermined pattern formed on the bottom surface of the outsole 32 to complete the manufacture of the sole 30.

However, by pressing the midsole 34 and the outsole 32 at the same time as described above, there is no need for a separate crimping process and the like, and thus the work force and work equipment can be reduced. Many problems, such as, have not been put to practical use.

First, in general, the midsole material is an EVA sponge, and in order to manufacture the midsole 34, an aluminum mold having good thermal conductivity is generally used to achieve high temperature transfer and rapid cooling, and the outsole material is in a vulcanized state of unvulcanized rubber. In order to make outsole with proper thickness in a vulcanized state, high temperature and high pressure are required, and it is manufactured by using iron mold, which is a hard material, to be able to withstand fragments without deformation at high pressure. Therefore, the method actually manufactured on the aluminum mold 10 has a problem that the mold is easily broken. That is, when the entire pressing is performed using the aluminum mold 10, in order to forcibly fill the inside of the engraving surface while making the vulcanized rubber, the outsole 32, the high pressure (about 120kg / ㎠) Since the high pressure is required, the engraving part 12a of the lower mold 12 made of aluminum material is easily broken, and there is a problem in that the lower mold 12 is produced again as well as the failure of the outsole 32. This is because the aluminum mold 10 is weaker than the iron mold because the portion of the outsole 32 formed inside the lower mold 12 of aluminum is easily damaged by the high pressure.

Above all, the biggest problem is that in the co-molding method, the contact of the midsole 34 and the outsole 32 prevents air remaining in the gap from escaping to the outside, resulting in poor contact, and the outsole material cut into the unvulcanized state. Is a disadvantage in that the color (a) is generated a lot of color due to the side of the midsole (34) in the state that the adhesive is not made by the pressure under the pressure in the mold 10 is not made. That is, as shown in FIGS. 3 and 4, the unvulcanized rubber introduced into the lower mold 12 is cut in advance by a desired dimension and is positioned only inside the outsole forming portion 12a, and the mold 10 is inserted into the mold 10. It is pressurized inside and is forced to be pushed into the inside of the flakes under pressure in the unvulcanized state, and the pattern is formed on the bottom surface by changing the physical properties in the vulcanized state by the high temperature. At this time, the midsole material located on the upper surface of the unvulcanized rubber is also compressed to form the midsole 34, and the bottom surface of the midsole 34 and the top surface of the outsole 32 are bonded to form the sole 30. In this case, at the side border boundary portion to which the midsole 34 and the outsole 32 are bonded, the compressed midsole 34 and the outsole 32 causing physical property change in a vulcanized state do not form a constant boundary and do not form a contact surface. Before the adhesive is fixed to the midsole 34, the vulcanized outsole 32 penetrates into the side of the midsole 34 to form a side rim in a zigzag shape, resulting in uneven contact and uneven contact (a).

In addition, there is a problem in that the adhesive surface coated with the adhesive for the adhesion of the unvulcanized rubber and the midsole material is not firmly bonded and a large amount of adhesion failure occurs. That is, a small amount of air is contained in the adhesive surface gap to which the adhesive is applied, so that the air is not compressed to the outside while being compressed by a press operation, and remains as it is between the gaps between the adhesive surface. As a result, pores are formed in the site where air is present, thereby preventing the adhesion of the outsole 32 and the midsole 34. Such a poor adhesion after the production of the actual shoe, causing the separation of the outsole 32 and the midsole 34 easily causes a complaint of the consumer has a problem that is not actually used well.

In order to solve the above problems, a new method of manufacturing a midsole and an outsole integrally using a separate medium plate has been developed and widely used.

As shown in FIG. 5, the lower mold 12 ′ is made of an iron mold to be configured to withstand sufficient pressure to make the unvulcanized rubber in a vulcanized state, and a separate middle plate 40 for manufacturing the outsole 32. ). In this case, in order to prevent the fragments of the outsole forming portion 12a 'formed on the lower mold 12 from being crushed or damaged when the unvulcanized rubber is filled into the fragments while receiving the pressure of the middle plate 40. The material of the middle plate 40 is made of aluminum. And, the middle mold 14 and the upper mold 16 for forming the midsole is to use the aluminum mold as in the prior art.

Briefly explaining the process of manufacturing the sole by the above configuration, first injecting the unvulcanized rubber into the outsole forming portion (12a ') of the lower mold (12') made of iron material, covering the middle plate 40 at a high temperature, Applying a high pressure to the rubber material is filled in each piece of the outsole forming portion (12a '). Thereafter, the middle plate 40 is removed and an adhesive is applied to the top surface of the outsole 32, which is a rubber material fixed while being filled in the fragment pattern without being completely vulcanized. At this time, the unvulcanized rubber is partially filled with the lower mold 12 while filling the inside of the piece under the pressure of the middle plate 40. After placing the intermediate mold 14 on the lower mold 12 'and injecting a midsole material therein, the upper mold 16 is covered and placed in a press to place the midsole 34 through pressurization, high temperature transfer, and quenching. The outsole 32 is formed while the semi-vulcanized rubber is completely vulcanized at the same time as the formation of the semi-vulcanized state. The sole 30 is formed by adhesion to a portion in contact with the midsole material in a state of being hardened to some extent.

However, the following problems occur in the sole manufacturing mold (10 ') as described above. The overall mold consists of an upper mold and an intermediate mold 14 and 16 made of aluminum and a lower mold 12 'made of an iron mold without air holes. However, since the heat transfer is poorer than that of the aluminum molds 14 and 16, the iron mold 12 'requires a considerable time for quenching after pressing the midsole. That is, when the midsole 34 and the outsole 32 are formed at the same time through the process of high temperature transfer and rapid cooling of the entire mold 10, a difference in thermal conductivity transmitted to the mold 10 occurs, and particularly, 140 to 155 ° C. The mold (10) heated to the temperature is a large difference in the time to go through the process of rapid cooling to 5 to 10 ℃. The upper mold 16 and the intermediate mold 14, which are made of aluminum, require 2 to 3 minutes for heat transfer from the press to the mold, and 2 to 3 times longer for the lower mold 12 '. It takes Therefore, when the sole is manufactured at the time of forming the midsole 34, the unvulcanized rubber, which is the outsole 32, is not completely vulcanized, and a lot of defective products are generated due to the reduction in the properties of the rubber material. In addition, in order to completely vulcanize the outsole 32, a lot of additional time is consumed, which causes a problem in that the sole production efficiency is greatly reduced.

In addition, in the above configuration, since a separate middle plate 40 is required, this increases the cost of manufacturing a mold, which is a problem that the price of the shoe increases in shoe price competitiveness, and the outsole forming part is used as the middle plate is used. Since the part is filled with rubber material, the rubber material is consumed a lot and the shoe sole is heavy.

In addition, in order to make the outsole in a dual color, another medium plate 40 is used to apply pressure and high temperature again, which causes troublesome work and greatly reduces productivity.

Accordingly, the present invention is to solve the problems of the upper limb, and provides a sole manufacturing method that improves productivity by reducing the sole manufacturing cost and shortening the manufacturing time by molding the midsole and the outsole integrally in a short time without defect at the same time. There is a purpose.

Another object of the present invention is to make the outsole made of a rubber material and a sponge material so that the boundary between the midsole and the outsole is clear, and using a less heavy rubber material to produce a lighter outsole to lighten the weight of the entire shoe, high functionality It is also in providing shoes.

Another object of the present invention is to make the midsole and the outsole in one aluminum mold, so that no separate outsole mold and midsole mold are required, thereby reducing the manufacturing cost of the mold and reducing the manufacturing cost of the shoe due to the shortening of the mold manufacturing period. To provide sole manufacturing molds.

1 is a perspective view of a typical shoe.

Figure 2 is a flow diagram schematically showing a conventional sole manufacturing method due to the integral molding of the midsole and outsole.

Figure 3 is a cross-sectional view of a conventional mold for manufacturing the sole sole of the midsole and outsole.

4 is a perspective view of a shoe sole manufactured by a conventional mold.

Figure 5 is a cross-sectional view of a mold according to another conventional embodiment for manufacturing the sole sole outsole midsole and outsole.

6 is a perspective view of a mold for manufacturing a sole by integrating a midsole and an outsole according to the present invention;

FIG. 7 is a cross-sectional view taken along the line AA of FIG. 6. FIG.

8 illustrates a sole material used by the present invention.

Figure 9 is a cross-sectional view of the mold is located midsole and outsole for shoe sole manufacturing according to the present invention.

10 is a cross-sectional view of a mold showing a pressurized state in the press for manufacturing the sole according to the present invention.

11 is a view showing another embodiment of the sole manufacturing according to the present invention.

12 is a cross-sectional view of a mold showing a state in which an outsole material is provided for producing an outsole made of multicolor.

13 is a cross-sectional view of a mold according to the present invention showing the dissimilar member is inserted into the outsole bottom surface.

<Description of Symbols for Main Parts of Drawings>

100: aluminum mold 110: outsole mold

112: outsole forming portion 114: groove portion

116: air passage 120: intermediate mold

122: midsole forming portion 130: upper mold

200: outsole material 210: rubber sheet

220: anti-color sheet 300: midsole material

500: press machine p: dissimilar member

q: space part

According to a first aspect of the present invention for achieving the above object, both end jaw surface of the outsole forming portion formed with a flake pattern on the inner surface is located lower than the mold surface, the groove portion is formed in the outer side of both end jaws and the air passage formed outsole aluminum A first step of placing an outsole material having fine air holes formed on the mold; The second step is to forcibly inject a midsole material of foamed EVA material into a midsole aluminum mold having a midsole shaping portion formed with a midsole shaping pattern, and to cut each mold into which the outsole material and the midsole material are placed. Wow; A third step of placing the nested mold in a press machine, applying a predetermined pressure and a predetermined high temperature, quenching the same, and forming and bonding the midsole and the outsole; And a fourth step of removing the outsole in the third step to remove the extra side rim of the portion forming the boundary between the midsole and the outsole; It provides a shoe sole manufacturing method to form a shoe sole by performing compression formation of the midsole and the formation of the outsole that is vulcanized and the bottom surface is formed and the adhesion of the midsole and the outsole at the same time inside one aluminum mold. In the third step, the pressurized high-temperature transfer process by the press, the air discharge process to partially discharge the air existing in the mold due to the pressure release in a state where heat transfer is not made, and pressurization and press quenching simultaneously by the press It is desirable to be made to the quenching process to make this. The pressure applied to the mold by the press is 50 to 70 kgf / cm 3, and after heating to a temperature of 140 to 160 ° C., the pressure is released for 5 to 20 seconds, and then rapidly cooled to 5 to 10 ° C.

The outsole material is made of an unvulcanized rubber sheet having a plurality of fine air holes and a color preventing sheet placed on the upper surface of the unvulcanized rubber sheet and having air holes formed therein and preventing the color from the midsole side. Preferably, the unvulcanized rubber sheet is formed to be somewhat larger than the outsole forming portion to cover the outer upper surface of the outsole forming portion of the outsole mold, and the color blocking sheet is adhered to the upper surface of the unvulcanized rubber sheet by an adhesive. It may be made of a sponge sheet formed with a plurality of fine air holes. Alternatively, the non-vulcanized rubber sheet is formed to be somewhat larger than the outsole forming portion is formed to cover the outer upper surface of the outsole forming portion of the outsole mold, the anti-coloring sheet is woven to be bonded to the upper surface of the unvulcanized rubber sheet by an adhesive It may be made of fiber paper or made of woven fiber paper that is adhered to the upper surface portion of the edge portion of the outsole forming portion of the unvulcanized rubber sheet.

In addition, the outsole material may be made of the unvulcanized rubber sheet and the sponge sheet by cutting the material bonded in one piece by an adhesive, or the unvulcanized rubber sheet and the sponge sheet may be separately cut and made in a mediated state by the adhesive. have. The sponge sheet allows a plurality of air passages to be formed so that air existing on the adhesive surface between the unvulcanized rubber sheet and the sponge sheet can be discharged to the outside. The pressure applied by the press is 50 to 70 kgf / cm 2, and the temperature is 140 to 160 ° C.

In addition, according to the second aspect of the present invention, a non-vulcanized rubber sheet having a different color and a piece of heterochromic outsole material provided with a color preventing sheet on its upper surface are placed at a predetermined position inside the outsole forming portion of the outsole mold. It provides a shoe sole manufacturing method for forming an outsole having two or more colors by placing the outsole material consisting of the unvulcanized rubber sheet and the anti-coloring sheet removed as much as the heterogeneous color material pieces across the outsole mold surface. have.

In addition, according to the third aspect of the present invention, an outsole forming portion, which is made of aluminum and has a height slightly lower than that of the mold surface, and has an outsole carving pattern formed on the inner surface thereof, is spaced apart from the outsole forming portion by a predetermined interval. An outsole mold having a groove portion formed inward from an upper surface and an air passage connected to the mold outer surface through the outsole forming portion; It is to provide a shoe sole manufacturing mold made of an aluminum material and made of a midsole mold formed with a midsole forming portion provided with a piece pattern for forming the midsole. And, the mold, the upper mold is located on the upper mold and the middle mold and the outsole mold is located on the lower side, the upper mold is located on the upper surface of the outsole mold is formed with a midsole piece pattern formed on the inner surface and the upper and lower open midsole forming portion The mold may be made of a three-stage mold of a midsole mold, or the mold may be made of a two-stage mold of an outsole mold positioned at an upper side and a midsole mold positioned at a lower side of the outsole mold and a midsole sculpture pattern is formed at an inner side thereof. . Therefore, there is another advantage of shortening the mold manufacturing cost and the mold manufacturing period by not requiring a mold or a middle plate for manufacturing a separate outsole. Hereinafter, a method and a sole manufacturing method of a shoe sole according to the present invention having the above configuration Preferred embodiments of the manufacturing die will be described in detail with reference to the drawings.

First, a mold for manufacturing soles according to the present invention will be described with reference to the drawings. 6 is a perspective view of a mold for manufacturing a sole according to the present invention. As shown, in this embodiment the mold 100 consists of three stages. The middle mold 120 and the protrusion 132 having the outsole mold 110 having the outsole forming portion 112 carved with the bottom pattern of the outsole, and the midsole forming portion 122 having the side pattern engraved with the midsole. Branch is made of a midsole mold consisting of an upper mold (130). In addition, the material of the mold 100 is made of aluminum so that high temperature transfer and rapid cooling are performed quickly, so that the work of the sole is performed quickly, thereby improving productivity. Since the mold 100 may generally use a mold used to manufacture a foamable E.V.A midsole, an iron mold for manufacturing a separate outsole is not required.

Next, the mold according to the present invention will be described in more detail with reference to the drawing of FIG. 7. As shown, the groove 114 is formed on the top surface of the outsole mold 110 spaced apart from the outsole forming portion 112 of the outsole mold 110 by a predetermined distance. The groove 114 is inserted along the side of the outsole forming portion 112 while being vulcanized by the pressure applied to the inside of the mold 100 so that the extra outsole material is inserted during the manufacturing of the outsole to be described later. This is to prevent clear color transfer to the midsole material side and to achieve a clean side border. The outsole forming portion 112 and both end jaws 112a having the grooves are formed so that their height is formed at a position slightly lower than the upper surface of the outsole mold. It is preferable that only the interval p between the upper surfaces of the both ends 112a to reach the top surface of the outsole mold 110 is about 3 to 5 mm. This means that when pressurized by the press, when the middle mold 120 and the upper surface of the outsole mold 110 are bonded to each other, a free space is generated by the gap p, so that the expansion of the rubber material vulcanized by high temperature and pressure causes the gap ( Since it is transmitted to the groove side through p) to prevent the color of the upper side. Meanwhile, a plurality of air passages 116 are formed through the bottom surface of the outsole forming part 112 of the outsole mold 110. When the pressure is applied to the inside of the mold 100 by the press, air remaining in the inside of the unvulcanized rubber or air present on the adhesive surface of the unvulcanized rubber and the color preventing sheet, which will be described later, is discharged to the outside to prevent contact defects. This is to prevent it from being vulcanized and to ensure that the rubber fragments are reproduced. That is, the most problem in the above-mentioned conventional method is that the adhesion failure is caused by the air present on the adhesive surface. Therefore, by forming the air passage 116 to the lower portion of the outsole mold 110, the adhesion defect is eliminated as the air present on the adhesive surface is discharged to the outside, and the non-vulcanized rubber plate without the separate middle plate outsole It may be in close contact with the bottom of the forming portion 112 is filled closely.

On the other hand, in the present invention, the locking device (not shown) of the mold is configured to be different. That is, the size of the locking hole (not shown) used in the conventional mold is formed to be somewhat larger, and the diameter of the locking pin to be inserted is formed smaller than the size of the locking hole. This is to allow the middle mold 120 and the outsole mold 110 to open slightly by the pressure inside the heated mold when the press pressure is released. That is, in the related art, the size of the locking hole and the diameter of the pin are the same, so that even when the press pressure is released, the contact surface of the outsole mold 110 and the intermediate mold 120 does not open even by the pressure inside the mold. The quench, which is a post process, was performed. However, in the present invention, before the quenching process is performed, the outsole mold 110 and the intermediate mold 120 are configured as described above so that the inner sole slightly expands between the gaps in which the midsole bottom is opened by internal pressure. This will be described later, but to prevent the outsole from being brown to the side of the midsole.

On the other hand, the locking device is configured in the same manner as before, and after applying pressure and high temperature using a press without completely locking the locking device, the pressure of the outsole mold 110 and the intermediate mold 120 is the same even if the pressure is released. You can also make gaps open. In other words, in the sole manufacturing method according to the present invention, the gap between the outsole mold 110 and the intermediate mold 120 is slightly widened so as to partially discharge the air in the state where the press pressure is released to prevent the color of the moon. Since the purpose is various configurations will be possible. On the other hand, in the above description has been described a three-stage mold consisting of three stages, the mold for manufacturing soles according to the present invention is not limited thereto. In other words, in addition to the three-stage mold, the two-stage mold consisting of the outsole mold and the midsole mold may also be applied. That is, it is also possible to manufacture a two-stage mold by making the midsole mold into one without making a separate intermediate mold and the upper mold. In this case, of course, it would be sufficient if the midsole mold is located at the bottom and the outsole mold is located at the top. Since the two-stage mold is obvious to those skilled in the art, the following detailed description will be omitted. Above all, the characteristic of the mold required in the present invention is that the height of the both ends 112a is low, and the main point is the outsole mold in which the groove 114 and the air hole 116 are formed.

Therefore, by forming the air passage 116 to the lower portion of the lower mold 110, as the air present on the adhesive surface is discharged to the outside, the adhesion failure is removed, and even without a separate plate, the unvulcanized rubber plate shape is outsole It may be in close contact with the bottom of the forming portion 112 is filled closely.

Meanwhile, in the present invention, the locking device of the mold is configured differently. That is, as shown, the size of the locking hole is made somewhat larger, and the diameter of the locking pin to be inserted is smaller than the size of the locking hole. This is to allow a slight gap between the middle mold and the lower mold due to the pressure inside the heated mold when the press pressure is released. That is, conventionally, the lock hole size and the diameter of the pin are the same, so that even if the press pressure is released, the inner surface of the lower mold and the intermediate mold are not opened by the pressure inside the mold, and then the quenching is performed. It was made. However, in the present invention, the locking device is configured as described above so that the lower mold and the intermediate mold are slightly expanded between the gaps in which the midsole bottom is opened by the internal pressure before the quenching process is performed. This will be described later, but to prevent the outsole from being brown to the side of the midsole.

The outsole material 200 will be described. Outsole material 200 used in the present invention is the unvulcanized rubber sheet 210 and the unvulcanized rubber sheet 210 to form a rubber material for performing the outsole function, such as the original anti-slip, integral contact with the midsole It is to be made of a color preventing sheet 220 to prevent the color of the moon. And, the unvulcanized rubber sheet 210 is to be formed a plurality of air holes (200a). This is to prevent the poor adhesion due to the smooth discharge of air generated by the compression of the air and the midsole material present on the adhesive surface between the unvulcanized rubber sheet 210 and the midsole. The air hole 200a is formed in a sheet-like sheet state, the size of which is small enough to be indistinguishable from human eyes, and the air hole is compressed by being vulcanized by the high temperature and pressure applied inside the mold 100. Since 200a is sufficiently filled, only the air remaining on the adhesive surface and the air remaining inside the unvulcanized rubber are compressed and discharged to the outside.

Next, the outsole material 200 consisting of the color blocking sheet 220 and the unvulcanized rubber sheet 210 will be described in more detail. That is, the unvulcanized rubber sheet 210 having an air hole is positioned at the bottom and the color blocking sheet 220 is positioned at the top. The color blocking sheet 220, when the adhesion occurs simultaneously with the formation of the outsole and the midsole by the high temperature and high pressure applied by the press, the unvulcanized rubber sheet 210 forming the outsole is prevented from being colored to the midsole side while vulcanized To do that. What can be used as the color blocking sheet 220 may be a material that can be separated between the boundary in order to prevent the vulcanized rubber component is located between the unvulcanized rubber sheet 210 and the midsole is transferred to the midsole side. It is possible to use such materials as natural fiber paper such as cotton fabric or synthetic fiber such as nylon and spandex, and synthetic resin materials such as sponge sheet or pvc resin sheet and polyurethane resin sheet. First, in the case of using the sponge sheet, the thickness of the outsole material 200 composed of the unvulcanized rubber sheet 210 and the sponge sheet is slightly different depending on the piece height of the outsole to be formed, but is usually maintained about 3 to 5 mm. At this time, the sponge sheet 220 serves as a kind of medium plate, and the side border of the midsole and the outsole is fixed by preventing the unvulcanized rubber sheet 210 which is vulcanized when the sole is manufactured in the mold 100 from being colored to the midsole side. So that a boundary line can be formed. In this case, the amount of uncured rubber sheet 210 to be used is reduced to lighten the weight of the sole as a whole, thereby making it possible to lighten the weight of the shoe and thus burdening the user's foot.

In addition, when the sponge sheet is used as the color preventing sheet 220, it is preferably made of EVA synthetic resin material that is a midsole material, and the sponge sheet and the unvulcanized rubber sheet 210 are combined to form an outsole material. In order to improve the adhesion of the midsole material and the sponge sheet is preferably the same material, because the side border portion forming the boundary between the midsole and the outsole can be formed uniformly. On the other hand, the outsole material can be cut to be somewhat larger than the inner shape of the outsole mold 110, the desired dimension is formed or to the size of the outsole forming portion 112, it can be cut in various sizes depending on the sole manufacturing method. For example, if the outsole material is largely cut and used, this means that the edge of the unvulcanized rubber is inserted into the groove 114 of the outsole mold 110 so as to be inserted into the gap between the intermediate mold 120 and the outsole mold 110. This is to prevent the color to the upper part during the vulcanization work by being vulcanized while receiving. In addition, a plurality of air holes 200a are formed on the sponge sheet in order to improve adhesion with the rubber sheet 210 material attached to the lower part during the press work. Therefore, the air generated by the compression of the air and the midsole present on the adhesive surface of the rubber sheet 210 and the sponge sheet during the press operation can be discharged to the outside through the air hole to remove the adhesive interference.

In addition, the outsole material 200 including the sponge sheet and the unvulcanized rubber sheet 210 may be formed in various ways. For example, the sponge sheet and the unvulcanized rubber sheet 210 may be previously manufactured and used in one piece, or may be separately cut and bonded in the mold. That is, as shown in Figure 8, the plate-like sponge sheet 220 and the plate-like uncured rubber sheet 210 is attached to the adhesive 230 to make a plate-like sponge sheet 220, the plate-like outsole material 200 The outsole material 200 having a predetermined size may be cut and used. Alternatively, the sponge sheet 220 and the unvulcanized rubber sheet 210 each having a predetermined size cut in advance may be separately manufactured, and then may be integrally bonded in a pressing operation for performing high temperature and high pressure in the mold.

Next, a case in which fiber paper is used as the color blocking sheet 220 will be described. In the case of using the fiber paper, the fiber paper of a predetermined size is placed on the upper surface of the unvulcanized rubber sheet 210, and the midsole material is placed thereon. Therefore, the fiber paper is located between the midsole material and the unvulcanized rubber forming the outsole, and serves as a kind of boundary separation. Therefore, the unvulcanized rubber sheet is prevented from being colored to the midsole side by fiber paper. On the other hand, when the fiber paper is to be used, since the fiber paper itself is woven into a fiber yarn, it is not necessary to form a separate air hole. On the other hand, the fiber paper used may be any natural fiber, such as synthetic resin or cotton fabric, preferably withstands a certain temperature applied to the press without deformation and good adhesion to both components of the midsole and outsole. The fibrous paper is more preferably made of some stretchable paper. This is because the unvulcanized rubber is vulcanized by the pressure of the press, so that a slight volume expansion is made so that the color reaction is flexibly blocked by the midsole side. In addition, the fiber paper may be used in a size that is placed throughout the non-vulcanized rubber 210, or may have a shape and size that is placed only on the edge portion to prevent color. That is, when the fiber paper is used as the maroon prevention sheet 220, the fiber paper does not have a thickness, unlike the sponge sheet, it does not need to be placed on the entire upper surface of the unvulcanized rubber sheet 210, and the color is on the boundary between the midsole and the outsole. This is because it is possible to achieve a sufficient purpose even if the paper placed only on the border. In the above description, the paper and sponge sheets have been described as the color blocking sheet 220, but as described above, various materials may be used as the color blocking sheet 220. Next, the midsole and the outsole material 200 and the mold 100 will be described in detail with reference to the drawings illustrating a method of manufacturing shoe soles integrally.

9 is a cross-sectional view of a mold for manufacturing a shoe sole according to the present invention. As shown, the outsole material 200 cut to a somewhat larger size than the outsole forming portion 112 of the outsole mold 110 is positioned to span the upper surface of the outsole mold 110, wherein the outsole material 200 Both ends are formed to a size enough to cover the groove portion 114 formed on the outsole mold 110, and have a height and a thickness almost equal to the height of the outsole forming portion 112 is formed in pieces. Since it will be described later by being formed in the same size as above, because the side border of the midsole and the outsole may be constantly formed border line. In addition, the outsole material 200 has an unvulcanized rubber sheet 210 positioned at a lower portion thereof, and a color preventing sheet 220 made of the above-described fibrous paper or sponge sheet positioned thereon, and the unvulcanized rubber sheet 210 positioned at an upper portion thereof. ) And the color blocking sheet 220 is bonded to the adhesive 230. In addition, the color blocking sheet 220 may have the same color as the midsole material 300 or the same color as the rubber sheet 210.

In addition, the color blocking sheet 220 and the rubber sheet 210 may be formed in a state of being integrally formed in advance by being bonded by the adhesive 230, or separately produced by the color blocking sheet 220 and the uncured rubber The adhesive 230 may be applied to the upper surface of the sheet 210 to be simply stacked on the sheet 210. The outsole material 200 consisting of the color blocking sheet 220 and the unvulcanized rubber sheet 210 may vary slightly depending on the thickness of the sole that is manufactured, but usually has a thickness of about 3 to 5 mm. In addition, in the illustrated embodiment, the color blocking sheet 220 is placed on the entire upper surface of the unvulcanized rubber sheet 210, but when the fiber paper is used, it is also possible to place only the edge portion bordering the midsole material 300. As mentioned above. This position is possible because the fiber paper does not have a special thickness unlike the sponge sheet.

As described above, after placing the outsole material 220 on the upper surface of the outsole mold 110, the adhesive is applied to the upper surface of the color blocking sheet 220 corresponding to the size of the outsole forming unit 112 and the intermediate mold 120 is applied. Position it above it. At this time, the lower surface of the intermediate mold 120 is located on the upper surface of the color blocking sheet 220, the upper surface of the outsole mold 110 and the lower surface of the intermediate mold 120 is not completely matched by the thickness of the outsole material 200. The predetermined interval is maintained. In the above state, the midsole material 300, which has been cut in advance, is somewhat forced to the midsole forming unit 122 rather than the size of the midsole forming unit 122 on the intermediate mold 120. Covering the upper mold 130 in the state in which the midsole material 300 is injected to perform the subsequent pressing process. In the case of the two-stage mold, the arrangement will be different from the three-stage mold described above. That is, the midsole material is first injected into the midsole mold, the adhesive is applied to the upper surface of the midsole material, and the outsole mold is positioned after the outsole material is placed on the upper surface so that the color blocking sheet is in contact with the surface.

Next, the process of forming the sole by using the three-stage mold as an example with reference to Figure 10 will be described in more detail.

After placing the mold in the press machine 500, pressure and heat transfer are performed through the upper and lower surfaces of the mold 100. In this case, the pressure applied is usually maintained at about 50 kgf / cm 3 to 70 kgf / cm 3, which is a pressure applied to form the midsole, and the temperature is maintained at about 140 to 160 ° C. This pressure applied in the present invention is less than the pressure applied to form the outsole alone in conventional methods. Therefore, in the related art, an iron mold was used to withstand the pressure in the manufacture of the outsole. However, in the present invention, the pressure applied to the outsole is less, so that the aluminum mold 100 can be used instead of the iron mold. The reason why less pressure is applied to form the outsole as described above is because the thickness of the rubber sheet 210 used as the outsole of the shoe can be made smaller. That is, not only the use of a small amount of rubber sheet is possible by attachment by direct contact with the midsole, but also because the anti-coloring sheet 220 forms a part of the outsole and at the same time functions as a middle plate.

In addition, the midsole material 300 and the outsole material 200 positioned inside the mold 100 are deformed by the applied pressure and temperature. That is, the unvulcanized rubber sheet 210 is uniformly infiltrated into each portion formed on the outsole forming portion 112 of the outsole mold 110 while being vulcanized by the pressure and temperature to be transmitted, and also the unvulcanized rubber sheet 210. It is also vulcanized. In this case, when the fiber paper is used as the color preventing sheet 220, the thickness of the fiber paper itself is small, and fine processing is formed in which the air is discharged in the fiber tissue itself. Thus, the air discharge between the unvulcanized rubber sheet and the midsole material is prevented. Since it is made smoothly, there is no problem in adhesion, and thus, the air generated during compression is formed in the air passage 116 formed on the bottom surface of the outsole mold 110 through the air hole formed on the unvulcanized rubber sheet 210 through the fiber paper. Through the outsole mold 110 is easily discharged to the outside. Therefore, when the fibrous paper is used as the color blocking sheet 220, the fibrous paper simply plays a role of a boundary layer and the unvulcanized rubber sheet 210 itself forms an outsole.

However, in contrast, when the sponge sheet is used as the color blocking sheet 220, the sponge sheet also penetrates into each part of the outsole forming unit 112 in close contact with the unvulcanized rubber to form a part of the outsole. In this case, since the sponge sheet is foam molded, it is compressed by the pressure applied to reduce the volume. In addition, a plurality of minute air holes (not shown) are formed on the sponge sheet and the unvulcanized rubber sheet 210. These air holes are formed in advance in the production of the plate-like sponge sheet is formed to a size that is hardly confirmed by the eye, in order to improve the adhesion between the unvulcanized rubber sheet 210 and the sponge sheet. That is, since an adhesive is applied to a surface where the unvulcanized rubber sheet 210 and the sponge sheet are in contact with each other, when air is present between the sponge sheet and the unvulcanized rubber sheet 210 to which the adhesive is applied, adhesion is difficult to be achieved. . Therefore, the air present on the surface to which the adhesive is applied by the pressure applied is discharged to the outside through the air hole formed on the sponge sheet and the rubber sheet 210, so that the surface between the unvulcanized rubber sheet 210 and the sponge sheet is in contact with each other. The hard adhesive can be made by the adhesive. That is, the air escaped to the lower portion of the unvulcanized rubber sheet 210 exits to the outside through the lower surface of the outsole mold 110 through the air passage 116 formed on the lower mold 110, and escapes to the upper surface of the sponge sheet. The air escapes between the gaps of the intermediate mold 120 and the outsole mold 110 so that no residual air exists, thereby preventing the occurrence of poor adhesion.

The sponge sheet is integrated with the unvulcanized rubber sheet 210 by applying pressure to the unvulcanized rubber so that the uncured rubber sheet 210 on the bottom surface is tightly filled in the inner space of the engraving surface by the pressure applied thereto. Each part of the formation part 112 is filled closely. The compressed sponge sheet forms a part of the outsole and at the same time gives a cushion to the outsole, thereby having a shock absorbing function. Therefore, when the sponge sheet is used as the color preventing sheet 220, the rubber part forming the outsole becomes thinner, and the sponge sheet forms part of the outsole, so the outsole has a shock absorbing function and at the same time, The weight can be reduced.

In addition, when the sponge sheet is used as the color blocking sheet 220, it is preferable to have the same color as the rubber sheet 210 or the same color as the midsole material 300. This is because the sponge sheet is integrated with the rubber sheet 210 is also compressed and filled in the outsole forming portion 112 of the lower mold 110, if the double edge is cut when the side border portion described later is cut off the merchandise Because it can be degraded.

Next, the biggest problem in the conventional formation of the outsole and the midsole is that the unbounded rubber is vulcanized and the color of the side surface of the midsole and the outsole in contact with the edge of the midsole is not constant. However, in the present invention, the color blocking sheet 220 made of the fiber paper or sponge sheet serves as the above-described heavy plate, the shape of the outsole mold 110, that is, the height of the both ends and the groove 114 and the air passage ( 116) eliminates this problem. That is, when the margarine rubber sheet 210 penetrates into the outsole forming portion 112 on the outsole mold 110 by the applied pressure to form the outsole, deformation occurs while being vulcanized to the outside of the outsole forming portion 112. When pushed out, it is transmitted to the groove 114 through a gap between the upper surface of both ends of the outsole material 200 located on the upper surface of the outsole mold 110 and the lower surface of the intermediate mold, and the transfer is not made to the upper side. . In addition, since the air passage 116 is formed along the bottom surface of the outsole forming unit 112, the outsole material 200 inserted into the outsole forming unit 112 may include the air remaining inside the outsole forming unit 112. It is filled to the bottom only while pushing out through the air passage (116). Therefore, the portion located inside the outsole forming portion 112 is no longer penetrated into the midsole portion from the inner surface of the outsole forming portion 112, as well as the midsole side as the fiber paper and the sponge sheet are vulcanized by vulcanized rubber. As it prevents the browning more, the color does not occur at all.

Next, the midsole material 300 is compressed by the applied pressure and temperature, and is in close contact with each of the delicate pieces of the midsole forming unit 122 to form a midsole, wherein the first midsole material 300 has a hardness of about Maintain 35 to 40 degrees, but the compressed midsole will maintain a hardness of about 50 to 55 degrees. In addition, since the adhesive is applied to the upper surface of the color preventing sheet 220 in contact with the bottom of the midsole, the midsole and the outsole are integrally bonded to form a shoe sole.

Then, after the press and the high pressure is applied for about 5 to 10 minutes so that the midsole and the outsole are integrally formed, the post-process may be taken to release the pressure applied to the press. As the pressure is released, the edge of the midsole compressed inside the intermediate mold is slightly expanded to exit between the lower mold and the intermediate mold gap. The reason for doing this is to block the color more completely when using a sponge sheet as a color blocking sheet 220. That is, in spite of the above-described process, if the unvulcanized rubber sheet is vulcanized and the color is generated on the side of the midsole, poor quality of shoes occurs. This is because the color of the color occurs at the place where the midsole and the outsole come into contact with each other, so that the color of the color can be completely prevented by removing the expanded portion from the lower part of the midsole through the gap between the middle mold and the lower mold. . That is, after all the processes have been made, by removing the midsole portion pushed out of the excess and gap of the outsole material, even if the portion painted on the side of the midsole can be removed, the color can be completely prevented. After the pressure release as described above, the time that the lower part of the midsole is pushed out by the expansion force inside the midsole material heated by the gap between the middle mold and the lower mold is about 5 to 15 seconds. If too much time is given, the amount of expansion of the midsole increases, and thus the content of the midsole itself is reduced. If too little time is given, it is difficult to completely block the color. According to the experiments of the present inventors, it was found that the above time zone is appropriate.

The sponge sheet 220 may have the same color as the rubber sheet 210 or the same color as the midsole material 300. This is because the sponge sheet 220 is integrated with the rubber sheet 210 is also compressed and filled in the outsole forming portion 112 of the lower mold 110, the double color is cut when the extra side border portion to be described later is cut This is because exposure may deteriorate merchandise.

Next, the biggest problem in the conventional formation of the outsole and the midsole is that the unbounded rubber is vulcanized and the color of the side surface of the midsole and the outsole in contact with the edge of the midsole is not constant. However, in the present invention, the sponge sheet 220 serves as the above-described middle plate, and this problem is eliminated by the groove 114 and the air passage 116 formed on the lower mold 110. That is, when the sponge sheet 220 and the unvulcanized rubber sheet 210 penetrate into the outsole forming portion 112 on the lower mold 110 by the applied pressure to form the outsole, the lower mold 110 Both ends of the outsole material 200 located on the upper surface are inserted into the groove 114 at the same time as the compression is in close contact with the gap between the surface of the middle mold 120 and the lower mold 110. In addition, since the air passage 116 is formed along the bottom surface of the outsole forming unit 112, the outsole material 200 inserted into the outsole forming unit 112 may include the air remaining inside the outsole forming unit 112. It is filled to the bottom only while pushing out through the air passage (116). Therefore, the portion located inside the outsole forming portion 112 is no longer penetrated into the midsole portion from the inner surface of the outsole forming portion 112, and the sponge sheet 220 and the midsole material 300 are made of the same material. Since the function and physical properties are the same, but the connection part is exposed to the outside, there is an advantage that is not easily distinguished, thereby increasing the merchandise.

Next, the midsole material 300 is compressed by the applied pressure and temperature, and is in close contact with each of the delicate pieces of the midsole forming unit 122 to form a midsole, wherein the first midsole material 300 has a hardness of about Maintain 35 to 40 degrees, but maintain a hardness of about 50 to 55 of the midsole on the compression. In addition, since an adhesive is applied to the upper surface of the sponge sheet 220 in contact with the bottom of the midsole, the midsole and the outsole are integrally bonded to form a shoe sole.

Next, another embodiment of the present invention will be described with reference to FIG. 11. As shown, it can be seen that the sole manufacturing method according to the present invention can be various. Basically, however, the present invention is to prevent the rubber forming the outsole from being colored to the side surface of the midsole, and to remove the poor adhesion caused by the air remaining on the adhesive surface. In other words, in order to prevent color defects, the thickness and size of the outsole material are adjusted and the midsole residue is removed. That is, when the outsole mold is cut out larger than a desired dimension and adhered to the groove 114 formed on the outsole mold 110, the unvulcanized rubber is vulcanized by the pressure applied, and the outsole mold is to be colored to the midsole side. Unfixed rubber having a predetermined thickness because it is pinched in the groove 114 formed on the 110 is fixed to the outsole forming portion 112 to prevent the color to the upper side, or the unvulcanized rubber inserted into the outsole forming portion By adhering the rubber sheet to the lower surface of the midsole material in advance, the unvulcanized rubber sheet is prevented from flowing to the midsole side due to the pressure applied to the mold. As described above in the state where the outsole material is adjusted as described above, the outsole mold and the intermediate mold are slightly opened while the press pressure is released, so that the lower part of the midsole comes out of the gap and is completely removed. To stop.

After the above process is completed, the entire mold 100 is quenched in a state where pressure is applied by a press again. Therefore, the bottom portion of the midsole pushed out by the press pressure applied again is compressed between the middle mold and the lower mold surface, and is integrally compressed while being stacked on the upper surface of the remaining outsole material so that the extra removal can be easily performed. And, the reason for quenching as described above is that when the natural cooling takes too much time to reduce the sole productivity. Therefore, productivity is improved by quenching.

On the other hand, after the process is finished, in the state in which the mold 100 is opened and the sole is taken out of the mold 100, an excess remains along the side edges of the adhesive portion between the midsole and the outsole. Therefore, by cutting off the excess along the boundary line to complete the finished sole.

First, in the case of the illustrated (I), the unvulcanized rubber sheet 210 'constituting a part of the outsole material 200' is formed to have a size that fits into the outsole forming portion 112 of the outsole mold 110, and prevents maroon. The sheet 220 'is rather largely cut so as to span the groove 114 formed on the outsole mold 110. When pressure is applied by the mold 100 in the above state, the edge of the color blocking sheet 220 'is inserted into the groove 114 on the outsole mold 110, so that the outsole mold 110 and the intermediate mold 120 face. It is clamped in between. Therefore, when the unvulcanized rubber positioned under the color blocking sheet 220 'is vulcanized under pressure, the color blocking is prevented toward the midsole by the color blocking sheet 220' functioning as a blocking plate, and the press pressure is released. The removal of the lower part inflated beyond the midsole size results in complete removal of the color.

In addition, when the fiber paper is used as the color preventing sheet 220 ', an air hole is formed only in the non-vulcanized rubber sheet 210' because no separate air hole is required. An air hole (not shown) is formed in 210 '. And because the air passage 116 is formed on the outsole mold 110, the air remaining on the adhesive surface is discharged to the outside through the air hole and the air passage 116 to prevent poor adhesion and the bottom surface of the vulcanized rubber This becomes thick and eliminates molding defects.

Next, in the case of (II) shown, the outsole material 200 '' is composed of only unvulcanized rubber sheets 200a '' and 200b ''. The outsole material 200 &quot; is cut somewhat larger than the desired size to span the groove 114 on the outsole mold 110 to have a rubber sheet 200a &quot; It is made of an outsole rubber sheet 200b '' attached to the upper or lower surface and cut to a somewhat smaller size than the outsole forming portion. In the present embodiment, the outsole rubber sheet 200b '' is attached to the bottom surface of the middle rubber sheet 200a '', but may be positioned on the top surface. In addition, air holes are formed on the rubber sheets 200a ″ and 200b ″.

After injecting the midsole material in a state where the outsole material 200 ″ is placed, the outsole rubber sheet 200 b ″ is vulcanized while the outsole rubber sheet 200b ″ is covered with the mold 100 and subjected to pressure and high temperature. It is filled with a gap between each side of the piece, and the edge of the middle rubber sheet (200a '') is inserted into the groove portion 114 on the outsole mold 110 between the outsole mold 110 and the intermediate mold 120 surface It is pinched and fixed to the midsole, so the color of the moon is blocked. In addition, even when a slight maroon is made, as described above, after the press pressure is released, the lower part of the midsole where the maroon is formed exits through a gap, and the extruded part is pushed out while the mold is pressed again to undergo the cooling process. The part is sandwiched between the upper surface of the vulcanized rubber while being sandwiched between the lower surface of the middle mold 120 and the upper surface of the outsole mold 110, and the color is completely removed by removing the portion.

In addition, as described above, since the air hole is formed in the outsole material 200 ″, air existing between the adhesive surface is discharged to the outside through the air hole 116 on the air hole and the outsole mold 110. Defects will be prevented.

Next, a manufacturing process of an outsole consisting of different colors will be described with reference to FIG. 12. In this embodiment, the outsole having various colors on the sole bottom is manufactured. As shown, the foamed sponge sheet 22 and the unvulcanized rubber sheet in a size that fits snugly to a portion where a separate color is inserted into the outsole forming portion 112 of the carved outsole mold 110 and a piece is formed. Outsole material formed on the outsole material (200) made of the same size, the outsole mold (110) on the upper surface of the outsole mold 110 in a state in which the space is inserted into a heterogeneous color outsole (210a) having a separate color in the space. The sole may be manufactured by positioning 200. Therefore, it is possible to easily manufacture a sole with a rubber sheet having a different color, it is possible to form a sole having a variety of colors. In addition, when the double color is represented only by the non-vulcanized rubber sheet, a rubber sheet cut in different colors may be inserted into the inner space, and a double color outsole may be formed by covering the entire rubber sheet made of another color on the upper surface thereof. There are many ways to do this.

In addition, as described above, since the air hole is formed in the outsole material 200 ″, air existing between the adhesive surface is discharged to the outside through the air passage 116 on the air hole and the lower mold 110. Defects will be prevented.

Next, in the case of (III) illustrated, unlike the case of (I) and (II) described above, the outsole material 200 '' 'is composed of only an unvulcanized rubber sheet, and covers the upper surface of the lower mold 110. The structure is not supported. That is, in the present embodiment, the outsole material 200 ′ ″ has an air hole formed to prevent adhesion failure, and an uncut material cut to a size inserted into the outsole forming unit 112 to prevent color defect. The rubber sheet is in a state of being firmly bonded by the midsole material 300 and the adhesive in advance. Therefore, when pressure is applied to the mold 100 by the press machine 500, the bottom surface of the midsole material 300 and the top surface of the outsole material 200 ′ ″ are firmly adhered to each other by an adhesive. Filled with each portion of the inner fragment surface of the 110 is vulcanized, and the color of the midsole 300 is prevented. That is, in the conventional method in which the unvulcanized rubber sheet and the midsole material are not completely adhered but merely the adhesive is applied, the outsole material is flowed under pressure by the applied pressure, and the color is made to the midsole side. However, the unvulcanized rubber sheet 200 '' ', whose thickness is adjusted by the pressure applied by bonding in advance, as in the present embodiment, is not flowed while being pressurized to the lower surface, so that the color of the midsole 300 is not formed. Even if the uncured rubber is vulcanized and the color becomes brown, the remaining part of the midsole caused by the press pressure release is released into the gap between the lower surface of the middle mold and the lower mold surface, and the color of the moon can be sufficiently removed by removing the portion.

In addition, since the air remaining inside by the air hole is sufficiently discharged to the outside through the air passage 116 of the lower mold 112, molding defects do not occur. In addition, the outsole material 200 ′ ″ may be made of a sponge and a rubber sheet, unlike the illustrated example. In this case, the sponge sheet and the rubber sheet are previously bonded and the outsole material cut to the size of the outsole forming unit 112 is previously bonded to the midsole material to be injected into the mold. Therefore, the outsole material is not only prevents the color and adhesion failure, but also makes the weight of the sole more lightweight.

Next, a manufacturing process of the outsole consisting of different colors will be described with reference to FIG. 12. In the present embodiment, the outsole having various colors on the bottom of the sole is shown. As shown, the foam sponge sheet 22 and the unvulcanized rubber sheet in advance to a size that fits perfectly to the portion where the pattern and pieces are inserted into a separate color is inserted into the outsole forming portion 112 of the carved lower mold 110 ( An outsole material is formed on the upper surface of the lower mold 110 in a state in which a space having the same size is formed in the outsole material 200 made of 210 and the space is inserted into a heterogeneous color outsole 210a having a separate color in the space. The sole may be manufactured by positioning 200. Therefore, it is possible to easily manufacture a sole with a rubber sheet having a different color, it is possible to form a sole having a variety of colors. In addition, when the double color is represented only by the unvulcanized rubber sheet, a rubber sheet cut in different colors may be inserted into the inner space, and a double color outsole may be formed by covering the entire rubber sheet made of another color on the upper surface thereof. There are many ways to do this.

And, Figure 13 is a view showing a case of inserting the various dissimilar members (p) in the outsole. Recently, shoes have been sold with a dissimilar member (p) attached to the bottom of the shoe, such as various types of accessory prints. These accessories (p) are usually thermoplastic synthetic resin material can be produced without changing the shape through the heating and cooling process, it is possible to display the logo and various patterns. In the sole forming method of the present invention, the insertion of the dissimilar member (p) can also be made simply while allowing the midsole and the outsole to be molded at the same time.

That is, the space portion q is formed in the outsole material 200 as much as the portion where the dissimilar member p is inserted, and the dissimilar member p is cut slightly larger than the space portion q so that the upper surface of the space portion q is formed. Make sure that the edges are covered by When the sole is manufactured in the same manner as described above in the above state, the edge of the dissimilar member (p) is the dissimilar member (P) in the state inserted into the upper surface of the outsole 200 and the bottom portion of the midsole (300). The center portion of the upper surface and the midsole 300 is closely adhered to the bottom surface of the central portion is exposed to the open outsole space (q) is integrally bonded while being sandwiched in the gap between the midsole 300 and the outsole 200. Therefore, since the accessory (p) can be easily attached to various accessories on the bottom surface of the outsole 200 without a separate bonding process, the production cost can be produced at a low cost and high value added.

As described above, according to the method of manufacturing a shoe sole according to the present invention, since a separate mold for manufacturing the outsole is not required, the manufacturing cost of the mold for manufacturing the sole is very low, and the mold manufacturing period is shortened, so that the shoe itself It is effective to lower the price of.

In addition, since the midsole and the outsole are bonded together with the molding, the outsole is simultaneously molded by the midsole molding time, so that the sole manufacturing process can be shortened, and the production equipment and the manpower can be greatly shortened. Providing a highly resilient outsole, but the price of the shoe is very cheap, it is possible to produce a competitive product.

In addition, since it is possible to form the bottom of the outsole having a variety of colors, and accessories such as various forms can be easily attached to the bottom of the outsole, the productivity is greatly improved, and there is another effect of making shoes with high added value.

On the other hand, in the present invention, when the outsole material is made of a rubber sheet and a sponge sheet, the sponge sheet has a lighter weight of the outsole, but also has a shock absorbing function. Even if there is another effect to lift the fatigue on the foot and more effectively protect the user's knees and the like.

Claims (11)

The unvulcanized rubber sheet and the browning prevention sheet are formed in an outsole mold made of an aluminum material having a stepped surface formed lower than an upper surface and a groove formed inwardly along the edge of the stepped, and having an outsole forming portion formed with an air passage communicating with the outside at the bottom. A first step of positioning the outsole material; Placing a midsole mold placed on the midsole forming portion of the foamed plate shaped midsole material mainly composed of ethylene vinyl acetate on the outsole mold; The upper mold-covered mold is placed in a press, and a pressure of about 50 to 70 kg / cm &lt; 3 &gt; and a temperature of 140 to 160 &lt; 0 &gt; C are released. A third step of preparing the sole by performing simultaneous bonding with molding; And A fourth step of removing the manufactured sole and removing the edge of the adhesive surface of the outsole material and the midsole material; A shoe sole manufacturing method, characterized in that the sole is formed by the bonding is performed simultaneously with the molding of the outsole material and the midsole material. delete delete According to claim 1, wherein the outsole material is composed of an unvulcanized rubber sheet formed with a plurality of fine air holes and a color preventing sheet placed on the upper surface of the unvulcanized rubber sheet, the air hole is formed, and the color is blocked to the midsole side. Shoe sole manufacturing method characterized in that. 5. The sponge sheet of claim 4, wherein the unvulcanized rubber sheet is spread over the outer stepped upper surface of the outsole forming portion, and the color blocking sheet is adhered to the upper surface of the unvulcanized rubber sheet by an adhesive and has a plurality of fine air holes. Shoe sole manufacturing method characterized in that made. [5] The shoe of claim 4, wherein the unvulcanized rubber sheet is spread over an outer stepped upper surface of the outsole forming unit, and the color blocking sheet is made of woven fiber paper adhered to the upper surface of the unvulcanized rubber sheet by an adhesive. Sole manufacturing method. According to claim 4, wherein the unvulcanized rubber sheet is spread over the outer stepped upper surface of the outsole forming portion, the color barrier sheet is made of a woven fiber paper that is bonded by an adhesive along the edge of the unvulcanized rubber sheet Shoe sole manufacturing method. delete An outsole mold formed of an aluminum material having a stepped height lower than an upper surface, a groove portion formed in an inward direction along an edge, and an outsole forming portion formed with an air passage communicating with the outside at the bottom of the bottom; A midsole mold made of an aluminum material and having a midsole forming portion formed on an inner surface for forming a midsole and having a top and bottom penetrating therethrough; And Shoe sole manufacturing mold, characterized in that consisting of; an upper mold provided with a protrusion corresponding to the midsole forming portion. delete delete