KR20010099480A - mold of shoes and sandals which are manufactured by it - Google Patents

Abstract

The present invention relates to a shoe mold and a sandal manufactured thereby, and more specifically, to a shoe mold provided with only a midsole such as sandals and having a cover formed thereon, to produce a finished product in one process. To this end, the present invention, the liquid phase EVA (EVA) material is injected into the upper and lower molds in a closed state, the statue is inserted and removed so as to form a dome-shaped cover 97 formed in the front of the midsole (95) ( 300 is provided in the upper mold 100 so that the EVA (EVA) material is moved to the upper portion along the statue 300 and when the injected material is aged, the upper and lower molds (100,200) fall when the Eve ( As the technical gist of the EVA material is foamed and the statue 300 is also separated from the upper mold 100, the manufacturing process is shortened and the occurrence of defective rate is reduced. It relates to a sandal footwear which is produced by this mold and to achieve improved productivity.

Description

Mold of shoes and sandals manufactured thereby

The present invention relates to a shoe mold, and more specifically, to a shoe mold, such as EVA, which can produce a finished product in a single process such as sandals, thereby improving productivity and reducing product defects. It relates to a sandal manufactured by.

Generally provided shoes, as shown in Figure 1 attached, consists of a sole (2, 3), the upper (4) coupled to the upper portion of the sole and the sole is an outsole (3) forming the sole of the shoe and It usually consists of a midsole (2) that forms the midsole of a shoe. However, not all shoes are uniformly composed of midsole and outsole, and may have only one part depending on the use and function of the shoe (1).

In addition, various types of shoes 1 are manufactured according to the structure and material of the soles 2 and 3 and the upper 4. For example, in the case of a jogging shoe, the material forming the sole and the upper has shock absorbing power. On the other hand, in the shoes that are required to be made of light materials and wear resistance and non-slip is to make shoes using the rubber material as the outsole on the bottom of the midsole.

As described above, in the shoe, depending on the structure, shape and material of the midsole and the outsole constituting the outsole up to the type, function and price of the shoe.

Particularly, in footwear where only a midsole is provided, such as a sandal, and a cover surrounding a user's foot is formed, the price of the use is inexpensive and needs to be light. To lower the price of shoes, mass production must be possible and high productivity must be maintained. In addition, it is possible to secure competitiveness by minimizing defect rate.

Usually, the material of the midsole is made of a urethane resin or EVA material, and the urethane resin contains environmental pollutants, and thus the use of the urethane resin is gradually limited in a situation where environmental regulations are gradually increased. . Recently, a material of EVA (EVA) material is widely used in place of the urethane resin, and has a high foaming property, thereby making it possible to produce a lightweight and excellent midsole with less material.

As a method of molding the midsole using the EVA material, there are largely an injection injection method and a press method. The injection injection method is a method of injecting the Yves material consisting of a liquid into the mold is formed to be somewhat smaller than the desired size, and expands the foam to produce Yve midsole, the press method is previously used by using the foam Yves basic compound It is a method of completing the midsole while pressing the foamed plate-like material through a mold, heating and cooling.

As the press method, there is an aspect unsuitable for manufacturing footwear such as sandals, and therefore, manufacturing is usually performed by an injection injection method. The injection injection method is suitable for mass production, but there are disadvantages in that dimensional defects are generated and the appearance is not so good.

2 is a schematic cross-sectional view showing a mold when the midsole is manufactured by the injection injection method according to the related art. In the manufacture of sandals according to the prior art as shown, one finished product is made by separately manufacturing the midsole and the cover and bonding the separately produced midsole and the cover.

FIG. 2 is a mold for manufacturing a midsole. The upper and lower molds 10 and 20 are formed, and in the state in which the upper and lower molds are combined, the liquid EVE material is injected through the injection hole, and the air hole 30 is formed in the upper mold. The air is discharged through the structure. After the material is injected and aged, the upper and lower molds 10 and 20 are separated to expand and expand the Yves material to form a midsole. Of course, the part forming the cover is produced in a separate process.

In manufacturing the midsole with the structure as described above, when the product was demolded, there was a problem that it is difficult to remove and a large amount of defects, the semi-finished bar manufacturing process has a problem that the productivity is long. And to have a better product demoulding had a problem in that a larger amount of release agent must be used.

Therefore, the present invention devised to solve the above problems, an object of the present invention is to provide a shoe mold and a sandal manufactured by the same to produce a finished product in a single step in manufacturing shoes such as sandals.

In addition, another object of the present invention is to provide a shoe mold and a sandal manufactured thereby, which can reduce the occurrence of defective products by allowing the product to be easily separated from the mold.

1 is a diagram showing the configuration of a typical shoe.

Figure 2-Schematic cross-sectional view showing a mold when manufacturing the midsole by the injection injection method according to the prior art.

3-schematic perspective view of a shoe mold according to a first embodiment of the present invention;

4-a top view of the lower mold.

Fig. 5-A (A-A) line cross section in Fig. 3.

6-a perspective view (a) of the upper and lower molds and sculptures according to the second embodiment of the present invention and a state diagram when the sandals are manufactured (b).

7 to 6 show the operation relationship between the hollow body and the position guide when the upper and lower molds in combination.

8- Schematic perspective view of a shoe completed by a shoe mold according to the present invention.

<Description of Major Symbols Used in Drawings>

90: Sandal 95: Midsole

97: cover 100: upper mold

110: center guide 120: center guide hole

130: air outlet 140: auxiliary air hole

200: lower mold 210: mid sole molding portion

220: inlet 225: outlet

230: vacuum furnace 235: auxiliary groove

300: Statue 310: Information Bar

320: body 325: cover molding

325 ': cover face 326: operating part

330: elastic member 340: hollow body

341: location guide 342: circular plate

343: Location guide hole

The present invention for achieving the object as described above, in the mold for manufacturing a shoe that is provided with only a midsole (sandsole) and the same material as a finished product, such as sandals, liquid EVA in the closed upper and lower molds (EVA) The upper mold is provided with a statue inserted into the upper mold so that a dome-shaped cover is formed to form a dome-shaped cover formed at the front of the midsole, and then the upper and lower molds are moved after the injected material is aged. It relates to a shoe mold and a sandal produced by the technical gist that the EVA material is foamed when it is dropped and at the same time the statue is separated from the upper mold.

The shoe mold according to the present invention, in manufacturing footwear having only a midsole (sandsole) and a cover surrounding the wearer's foot, such as sandals, the finished product is completed in one process, resulting in excellent productivity and reduced generation of defective products. You have an advantage.

In addition, it is possible to solve the problem that the product was not easily separated from the mold, which was a problem in manufacturing the midsole as the Eve material.

In addition, when the shoe mold according to the injection injection method according to the present invention can be manufactured according to the foaming rate, the material cost can be reduced, and thus has the advantage of making a lighter weight product.

In addition, the sandal manufactured according to the present invention has no seam because the midsole and the cover are integrally completed in one process, and thus, the sandal of the sandal can be more rigid structure, and the production cost is reduced by shortening the manufacturing process. It is possible to provide a sandal with the advantage of lowering and increasing industrial competitiveness.

Hereinafter, a shoe mold according to the present invention and a sandal manufactured thereby will be described in more detail. First, a process of manufacturing the shoe mold will be described.

Shoe mold according to the present invention is largely composed of the upper mold, lower mold and sculptures and the sculpture is combined with the upper mold is inserted and detached, and is also referred to as a three-stage mold distinguished from the general two-stage mold.

In forming the mold, the material is a special alloy of nickel and chromium and a heat-treated cast steel material, and it is preferable to improve the thermal conductivity and durability of the mold.

As a process of manufacturing a shoe mold, first, a wooden mold is manufactured, and the wooden mold is installed in a predetermined mold. Next, the mold is applied with a silicone liquid so that the shape of the midsole is replicated. Next, gypsum is applied to the area coated with silicone to coagulate, and then the die is removed. After removing the wooden mold, the silicone coating part appears, and after the plaster is poured and solidified, the solidified gypsum and the silicone coating part are removed.

The final mold is completed by pouring the nickel, chromium special alloy and heat-treated cast steel material into the gypsum completed as described above. The upper mold, the lower mold and the statue are produced by the method as described above, and then assembled. In particular, in assembling the statue to the upper mold, it is important that the statue is exactly horizontal.

In the above, the general method for manufacturing the upper mold, lower mold and sculpture used in the present invention has been described, hereinafter will be described in detail with respect to the shoe mold according to the present invention with reference to the accompanying drawings.

(First Embodiment)

3 is a schematic perspective view of the shoe mold according to the first embodiment of the present invention, the upper mold 100, the lower mold 200 and the sculpture 300 is composed of the upper and lower molds are separated Is showing. The lower die 200 is fixed on a frame (not shown), and the upper die 100 is moved up and down along a post member (not shown) formed at left and right ends of the frame. And the rear side of the upper and lower molds (100, 200) is provided with an injection machine (not shown) for ejecting the Yves material into the mold.

4 illustrates a plan view of the lower mold, and the lower mold will be described first. The lower die 200 is a portion where the midsole is formed and is provided with a plurality of embossed protrusions to form the bottom surface of the midsole. And the rear side of the lower die 200 is provided with an inflow path 220 into which the liquid YE material is injected from an injection machine (not shown), and the inflow path 220 is continuously formed and splits to the left and right and the midsole molding part. In the vicinity of the 210, the inflow passage 220 is formed as a core portion, and is connected to the rear axle of the midsole molding portion 210 to form an outlet 225 forming a through hole. The liquid Yves material supplied by the injection machine (not shown) is supplied into the mold through the outlet 225 and the supplied material flows while filling the empty space formed by the upper and lower molds 100 and 200. .

On the other hand, in the lower die 200, the vacuum path 230 is formed on the front side of the midsole molding portion 210, and a more detailed shape is a predetermined distance from the left and right midsole molding portion 210 as shown in FIG. Continuously, arc-shaped continuous grooves are formed, respectively, and the two arc-shaped grooves are combined into one and the air escapes to the air discharge path 130 formed in the upper mold 100. The vacuum furnace 230 serves to maintain a vacuum state by discharging the remaining air in the mold, and a vacuum pump (not shown) is provided on the upper portion of the upper mold 100 to forcibly remove the remaining air. do. In addition, a plurality of auxiliary grooves 235 are formed as the midsole molding part 210 in the arc-shaped vacuum path 230 to allow air to escape from the midsole molding part 210.

Next, the upper mold 100 and the statue 300 will be described. The upper mold 100 according to the first embodiment of the present invention is provided with a statue 300 separated from the left and right sides and moved up and down along a post (not shown) to be accurately positioned when combined with the lower mold 200. A plurality of center guides 110 protruded to be coupled to each other is provided, and the lower die 200 has a center guide hole 120 corresponding thereto. And the air discharge path 130 is formed at a position corresponding to the front end of the upper mold 100, that is, the final end of the vacuum path 230 formed in the lower mold 200, the vacuum pump (not shown) The air remaining in the mold is forcibly discharged to the outside by the operation of si).

Statue 300 is to be coupled to the upper mold 100, the statue 300 is inserted into the upper mold 100 when the upper and lower molds (100,200) are combined and the statue 300 when the upper and lower molds are separated ) Is separated from the upper mold 100 by its own weight and protrudes outward. The lower surface of the statue 300 is combined with the lower die 200 to function to form the shape of the upper surface of the midsole when forming the midsole, the lower surface of the sculpture 300 forms a plurality of irregularities. In addition, the front portion of the statue is a portion to be formed integrally with the midsole, the liquid is injected into the lower mold 200 (EVA) material is supplied.

In other words, the upper and lower molds (100, 200) is coupled and thereby the statue 300 is inserted into the upper mold 100, the front portion of the statue 300 and the upper mold 100, which is the portion where the cover is formed An empty space is formed therein, and the injected Yves material is supplied from the lower mold 100 through the front portion of the statue through a space formed by the combination of the upper and lower molds and the statue.

With reference to the accompanying Figure 5 will be described with respect to the coupling relationship of the prize money mold and sculpture. FIG. 5 illustrates a schematic cross-sectional view of the AA line in FIG. 3, wherein a guide bar 310 protruding upward from the center of gravity of the statue 300 is coupled to the guide bar 310. ) Is inserted into the guide bar guide hole 315 formed in the upper mold 100 so that the statue 300 is movable up and down. At the end of the guide bar 310 to form a protruding stopper to determine the maximum moving distance of the statue. As mentioned above, the statue 300 is a structure that is separated from the upper mold 100 by its own weight, and the guide bar should be installed at the center of gravity so that the statue can be accurately leveled. In the first embodiment of the present invention, the guide bar 310 is formed on the upper two places of the statue 300 so that the shanghai can be made accurately.

And the front portion of the statue 300 is supplied to the liquid YE this material through the space formed when combined with the upper mold 100, bar portion is made of a lower surface than the other surface At this time, the auxiliary groove 235 'and the vacuum path 230' are also formed so that the generated air can be discharged. The vacuum path 230 ′ formed on the statue 300 is provided in front and rear portions of the cover forming surface 325 ′ in which a cover is formed to be spaced apart in a T-shape, and the cover molding surface 325 ′ and the cover molding surface 325 ′. The air generated by being connected by the auxiliary groove 235 'falls into the vacuum path 230'.

Discharge of air collected to the upper portion of the statue 300 is to be naturally discharged through the auxiliary air hole 140 formed in the upper mold 100 corresponding to the vacuum furnace. The auxiliary air hole 140 is formed to communicate from the inside of the upper mold 100 to the outside. In order for this material to be supplied smoothly to the front of the statue 300, sufficient pressure must be applied and the air remaining inside the mold must be discharged to the outside. The auxiliary grooves 235 'and the vacuum furnace 230' formed on the statue 300 function to smoothly supply the material of the liquid Eve and at the same time allow the remaining air to be completely discharged so as to bubble the surface of the product during foaming. It is to function to prevent the generation of defective products by.

The shoe mold according to the first embodiment of the present invention has been described in detail above, and the operation relation of the shoe mold according to the above configuration will be described.

The upper and lower molds 100 and 200 are maintained at a high temperature of about 170 ℃, when the upper and lower molds are combined, the statue 300 is inserted into the upper mold 100 to form a space for forming the cover And a space for forming a midsole (midsole) is made by the lower surface of the lower die 200 and the statue 300. In the state in which the upper and lower molds 100 and 200 are coupled, the liquid EVE material is introduced into the inflow path 220 formed at the rear of the lower mold 200 by the injection machine, and the liquid EVE material is It fills the space formed by the lower die 200, the statue 300 and the upper die 100, and is finally supplied to the space formed by the statue and the upper die.

After EVE material is supplied, it is aged for 7-10 minutes and then the upper and lower molds are separated. Yves material which is injected by separating the upper and lower molds to have the overall shape is foamed and molded into the final product shape. At this time, the statue 300 is separated from the upper mold 100 by its own weight and protrudes downward, thereby the product is naturally separated from the upper mold 100. Therefore, it is possible to solve the occurrence of defective products caused by the product is attached to the upper mold does not fall and has the feature that the midsole and the cover are molded in one process at the same time.

Second Embodiment

Hereinafter, a second embodiment according to the present invention will be described.

6 is a schematic perspective view (a) of the upper and lower molds and sculptures according to the second embodiment, and a state diagram (b) when the sandals are manufactured. An elastic member such as this is installed to make the statue more smoothly and accurately separated from the upper mold.

The structure of the lower die 200 is the same as in the first embodiment, and the structure of the statue will be described in detail as follows. As shown in FIG. 6, the sculpture 300 includes a body 320, an elastic member 330, and a hollow body 340. The body 320 is again divided into a cover molding portion 325 and the operating portion 326 is formed integrally. That is, the cover molding portion 325 having the same shape protrudes to the left and right sides of the front portion of the operating portion 326, the cover molding portion 325 is the Yves material injected after the upper and lower molds are combined It is pushed up by the pressure and functions to form the basic shape continuously and integrally with the midsole.

A plurality of protruding embossed portions are formed on the lower surfaces of the cover molding part 325 and the operation part 326 to be combined with the lower mold 200 to form the upper surface part of the midsole. The part where the liquid Yves material is supplied in the lid molding portion 325 is formed lower than the other surface (referred to as the cover molding surface 325 ′), and when combined with the lower mold 200, the liquid Yves material A predetermined space is formed so that the mold can be supplied from the lower mold along the cover molding surface 325 '.

As in the first embodiment, the vacuum path 230 'and the auxiliary groove 235' are spaced apart from the cover molding surface 325 'of the cover molding part 325. Air discharge between the vacuum path 230 'and the cover molding surface 325' is made through the auxiliary groove 235 '. As described above, when the upper and lower molds 100 and 200 are combined and the liquid Eve is injected into the material, air is generated in the mold. Most of the generated air is forced through the vacuum path 230 formed in the lower mold 200. Discharge is made. And the air is also generated in the upper part of the statue 300, if the air is not discharged to the outside of the liquid YE this material is not supplied smoothly and also remains as a bubble when foaming causes a small scratch on the surface of the product, this problem By solving the above, the vacuum path 230 'and the auxiliary groove 235' are formed. In this embodiment, the air discharge through the vacuum path 230 'and the auxiliary groove 235' formed in the statue 300 is to be naturally discharged through the auxiliary air hole 140 formed in the upper mold, It is not limited to this may be configured to be forcibly discharged by a separate vacuum pump.

Next, the elastic member 330 will be described. As shown in FIG. 6, a coil spring is used as the elastic member 330, one end of which is fixed to the inner upper end of the upper mold 100, and the other end of the elastic member 330. It is fixedly installed on the upper surface of the operating unit (326). The elastic member 330 is to provide a constant pressing force to the statue 300 is inserted into the upper mold, whereby the statue 300 is precisely due to its own weight and the repulsive force of the elastic member 330 Function to separate from. Preferably, the coil spring as the elastic member 100 may be selected to have a sufficient safety factor to withstand high temperatures and to prevent plastic deformation due to repeated use.

Next, the hollow body will be described with reference to FIG. 7. The hollow body 340 is a member that is inserted and fixed near the left and right both ends of the operating portion 326, combined with the position guide 341 formed from the upper mold 100, the statue 300 is the upper mold (100) To be correctly inserted). Figure 7 shows the operating relationship between the hollow body and the position guide when the upper and lower molds are coupled. The hollow body 340 is inserted into and fixed to the operating unit 326 is a hollow hollow tube shape and the lower end is formed to protrude outward to the outside. Corresponding holes are also formed in the operating part 326 so that the hollow body 340 can be inserted and fixed.

A position guide 341 is formed from the upper mold 100, which is inserted into the hollow body 340 to be assembled, and the statue 300 is moved up and down along the position guide 341. A circular plate 342 is bolted to the lower end of the position guide 341, which is in contact with the bottom protruding end of the hollow body 340 to limit the maximum falling distance of the statue. On the other hand, the position guide 341 is to maintain a state set to a predetermined length, when the upper and lower molds (100, 200) are combined, the position guide hole 343 is formed in the lower mold 200 As it is inserted into the) to act as a guide so that the statue 300 is seated in the correct position.

That is, when the upper and lower molds 100 and 200 are combined, the sculpture 300 is inserted into the upper mold 100 while being moved upward along the position guide 341, and the lower mold 200 and the lower mold 200 are formed for the midsole molding. A space is formed and the upper mold 100 is formed with a space in which a cover can be formed. The sculpture 300 is always fixed by the hollow body 340, the position guide 341, and the position guide hole 343. It can be placed in position.

Of course, as in the first embodiment, the upper and lower molds 100 and 200 are provided with a center guide 110 and a center guide hole 120 so as to be precisely mutually coupled.

Referring to the operation relationship in the second embodiment of the present invention according to the configuration as described above are as follows. The upper and lower molds (100, 200) in the open state, the upper mold is lowered, and the first statue 300 is inserted into the interior of the upper mold (100) and the upper mold (100) first contact with the lower mold (200) The lower center guide 110 and the position guide 341 is inserted into the center guide hole 120 and the position guide hole 343, respectively, while maintaining the correct position to form an empty space therein. In the state in which the upper and lower molds 100 and 200 are combined, the liquid Yves material is injected through the inflow path 220, and then Yves fills the midsole portion and then along the cover molding surface 325 ′ formed in the statue 300. The material fills the empty area. The air generated while the liquid Eve is filled with the material is forcibly discharged through the vacuum furnace 230 formed in the lower mold 200, and the air generated on the cover molding surface 325 ′ is the upper mold 100. It is naturally discharged to the outside through the auxiliary air hole 140 formed in. When the injection of the material is completed, it goes through a aging process of about 7 to 10 minutes. After that, the upper and lower molds are separated, and Eve Y material, which has a basic shape, is foamed and molded to the prescribed dimensions. When the upper and lower molds are separated, the statues are separated from the upper molds at the same time by their own weight and the repulsive force of the elastic member, and at the same time, the product to be released functions from the upper molds.

The shoe mold according to the present invention has been described in detail above, and hereinafter, the sandal manufactured by the shoe mold will be described. 8 is a schematic perspective view of a sandal completed by the shoe mold, and as shown, the sandal 90 is composed of a midsole 95 and a cover 97. In general, the manufacturing method of such a sandal is made of a complete sandal only after the midsole and the cover are made separately and then bonded. As a bonding method, an adhesive may be used or a stitch may be performed.

The sandal 90 according to the present invention is subjected to the maturing process after the injection of the EVA material (EVA) into the above-described shoe mold inside the upper and lower molds (100,200) is opened and foamed to produce a complete product. In other words, since the midsole and the cover are formed at the same time by a single process, there is no need for a separate secondary work, and since there is no joint, a solid and long-term use is possible.

And the sandal according to the present invention can be produced according to the foaming rate of Yves material, the foaming rate can be increased to produce a finished product as a small material by high foaming rate, thereby providing a lightweight sandal.

In addition, in the composition of the YB material, by adding components such as silicon dioxide (SiO ₂ ), aluminum oxide (AL ₂ O ₃ ), silver (Ag), sodium (Na), etc., to conventional YB material, This can be done, adding a variety of incense to provide freshness when worn and to remove the smell of the foot.

The present invention by the above-described configuration has the effect of reducing the production cost by shortening the process by being able to produce the finished product in a single process in manufacturing footwear such as sandals.

In addition, since the sandal manufactured by the shoe mold of the present invention is integrally manufactured without the joint, the sandal may be prevented from being disposed of due to damage to the joint due to long-term use.

In addition, since the mold can be completely demolded between the product and the mold, there is also an effect that can solve the problem that the product is stuck to the mold and the defect occurs.

In addition, by increasing the foaming rate it is possible to reduce the material cost and to provide a lightweight product.

Claims (7)

In the mold for manufacturing a shoe that is only finished with a midsole (95) and a cover (97), such as sandals (90), Liquid EVE material is injected into the upper and lower molds 100 and 200 in a closed state, and the statue 300 is inserted into and removed so that a dome-shaped cover 97 formed at the front of the midsole 95 is formed. Is provided in the (100) the EVA (EVA) material is moved upwards along the statue 300 and when the injected material is aged after the upper and lower molds (100,200) fall the EVA (EVA) material is foamed At the same time the sculpture 300 is also a shoe mold, characterized in that separated from the upper mold (100). The method of claim 1, wherein the statue 300, Shoe mold, characterized in that the lower surface is in contact with the lower mold (200) to form the upper surface of the midsole (95). The method of claim 1 or 2, wherein the statue 300, When the upper and lower molds (100,200) are separated, the shoe mold, characterized in that separated from the upper mold (100) by the weight of the sculpture (300) itself. The method of claim 1 or 2, wherein the statue 300, Shoe mold, characterized in that separated from the upper mold by the elastic member 330 is connected to the upper mold (100). The method of claim 4, wherein the statue 300, Left and right sides are formed integrally with the body 320 is separated or combined from the upper mold 100; An elastic member 330 having one end coupled to the upper left and right sides of the upper mold 100 and the other end coupled to the left and right sides of the rear surface of the body 320; The hollow body 340 which is installed in the through hole formed at the left and right edges of the body 320 and is inserted into the position guide 341 extending from the upper mold 100 to guide the shanghai movement of the statue 300. Shoe mold, characterized in that it comprises a. The method of claim 1 or 2, wherein the upper mold 100, Shoe mold, characterized in that the auxiliary air hole 140 is formed in a portion corresponding to the cover molding portion 325 formed in the statue (300). Sandal, characterized in that the midsole (95) and the cover (97) are formed at the same time by the shoe mold of claim 1.