KR100728075B1 - Shoes manufacturing method - Google Patents

Abstract

A shoe manufacturing method is provided to minimize the number of tools used to make a shoe and produce shoes having various sizes by making the length of the shoe different while making the width of the shoes in each group identical. The shoe manufacturing method includes the steps of: grading step by setting up sizes graded from a designated master size to be in the same group, making the shoe in the same group have the same width and making the 7 line top of the foot circumference and the 4 line top of the foot circumference have wide type size; forming a lower body(30) and an upper body(20), making the lower body in the same group formed in the same device, and making the upper body in the same group have the same width and have the 7 line top of the foot circumference and the 4 line top of the foot circumference; and assembling the upper body(20) and the lower body(30).

Description

SHOES MANUFACTURING METHOD

1 is a flow chart for explaining a shoe manufacturing method according to the technical idea according to the present invention;

2 is a view for explaining a last design method according to the shoe manufacturing method according to the present invention;

3a and 3b are views for explaining a shoe manufacturing method according to a first embodiment of the present invention;

4a and 4b are views for explaining a shoe manufacturing method according to a second embodiment of the present invention;

5a and 5b are views for explaining a shoe manufacturing method according to a third embodiment of the present invention;

6a and 6b are views for explaining a shoe manufacturing method according to a fourth embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: last 12: (last)

14: (upper body) bottom surface 20: upper body

22: (upper body) main surface 24: (upper body) bottom surface

30: lower body 40: midsole

42: first midsole 44: second midsole

50: outsole 52: first outsole

54: second outsole 60: indicator

L: Length W: Width

BG: 7-wire back IG: 4-wire back

The present invention relates to a shoe manufacturing method, and more specifically, when manufacturing shoes, the length is to have each size, the width of the shoes to be the same for each group, the ball and instep to have a wide type size And, by performing the grading operation to manufacture the shoes by using the same equipment for the production of shoes by group The present invention relates to a shoe manufacturing method that can minimize the number of equipment used to manufacture shoes.

In general, all shoe manufacturers must provide shoes of each size accordingly to satisfy users of various foot sizes. In general, the manufacture of shoes is based on a variety of data to produce a lasting (last), and to determine the size grade of the rask and pattern based on the user's dimensions (grading), Accordingly, parts and materials are prepared and completed through molding.

Therefore, according to the normal shoe manufacturing method, the equipment used to manufacture the shoes should be made one set for each size. That is, devices for midsoles, outsoles, and other functional components (typically, molds are used) must be made for each size.

At present, various technologies related to the material, design, and function of shoes have been proposed, and various types of shoes are provided by many shoe manufacturers, and consumers have a wider range of choice of shoes. In line with this trend, shoe producers faced the challenge of actively introducing small quantities of multi-products.

However, according to the shoe manufacturing method as described above, since the equipment used to manufacture the shoes must be manufactured separately for each set, one set for each size, in the shoes producer's position, to control the shoe unit price and production cost There is a difficult problem.

On the other hand, Korean Patent Publication No. 1996-0006292, "Method and apparatus for manufacturing shoe and shoe parts," refers to an external surface of a model bone representing a specific shoe shape in order to generate a model bone digital file representing a three-dimensional surface contour of each model bone. An operation step of digitizing a plurality of sample points on the image, an operation step of ranking the model bone digital file to generate one or more graded bone digital files, each representing a different bone size of each shoe type, It is proposed a shoe bone manufacturing method characterized in that it comprises an operation step of using each of the above grade bone digital pile to form a grade shoes bone of the shoe form. This technique can be applied to equipment designed specifically for making graded parts or shoe bones used in shoe manufacturing, and can also be applied to barn-type devices and to display images of model shoe bones on the screen. It is proposed a technology that allows, but as described above is not a technology that can reduce the equipment required for the production of shoes.

Also, in addition to such technology, Korean Patent Publication No. 0140023 "Shoe sole for shoe and its manufacturing method" has been proposed in various forms, but most of them are related to the application of a specific material or the structural improvement of shoe components. As a result of the proposed technology, they are not technologies that can reduce the equipment required for shoe production as described above.

Accordingly, the present invention has been proposed by such a necessity, and provides a new type of shoe manufacturing method and shoe accordingly, which can provide shoes of various sizes while minimizing the number of equipment used to manufacture the shoes. It aims to do it.

In particular, the present invention, when manufacturing the shoe length is to have each size, the width of the shoes to be the same for each group, 7-wire back circumference (ball Gus) and 4 wire back circumference (Instep Gus) wide type size And a new type of shoe manufacturing method that can minimize the number of equipment used to manufacture shoes by allowing the same equipment to be used for grouping of shoes by grading and manufacturing shoes. It is an object to provide shoes accordingly.

According to a feature of the present invention for achieving the above object, the present invention provides a shoe manufacturing method, the size to be graded from the master size specified at the time of designing the shoes to the same group, the shoes in the same group each length To have the same width but to have the 7-wire back and the 4-wire backrounds having a wide size; The lower body and the upper body are formed to be coupled to correspond to the shoe size set in the grading step, wherein the lower body has a length greater than the length having a maximum value in the size of the same group and the same width so that the lower body in the same group is the same Forming in the device, the upper body having the same width but having a length, a seven-wire back circumference, and a four-wire back circumference corresponding to the size of each shoe set in the grading step; And processing the lower body according to the upper body formed respectively, and assembling the lower body.

In the shoe manufacturing method according to the present invention as described above, the same group may be made of three sizes to give a deviation by one step up and down around the master size.

In the shoe manufacturing method according to the present invention, each length of the shoes set to the same group has a deviation of 4.23 mm based on the master size, and the seven-wire back circumference and the four-wire back circumference are based on the master size. It can have a deviation of 3.18 mm.

When the lower body is formed in the same device in the shoe manufacturing method according to the present invention as described above, it is possible to form a display sphere for displaying the length of each corresponding size in the same group.

In the shoe manufacturing method according to the present invention, the lower body is provided with a midsole and an outsole, the midsole is processed to the length of the upper body by processing the front and rear ends, the outsole is protruded to the upper side of the front and rear ends of the upper body Can be attached.

In the shoe manufacturing method according to the present invention, the lower body has a midsole and an outsole, but the midsole is formed by injection molding so that the length of the front end is adjusted through aging, and the length of the rear end is inserted into the rear end of the upper body. By adjusting the attachment angle is coupled to the length of the upper body, the outsole is made of a first outsole and a second outsole coupled to the front and rear sides of the midsole, and the front and rear of the first outsole and the second outsole. The stage may protrude upward and above the front and rear ends of the upper body.

In the shoe manufacturing method according to the present invention, the lower body has a midsole and an outsole, but the midsole has a first midsole and a second midsole coupled to the front and rear sides of the upper body, and the first midsole and the first The second midsole is adjusted to the length of the upper body by adjusting the coupling positions overlapping each other in the middle, and the outsole is the first outsole coupled to the bottom surface of the first midsole, and the second outsole coupled to the bottom surface of the second midsole. It can be provided with.

According to another aspect of the present invention for achieving the above object, in the shoe manufacturing method, the size to be graded from the master size specified in the design of the last set in the same group, the last belonging to the same group, respectively Grading the last corresponding to each shoe size to be produced by having a length of a corresponding size but having the same width, and having a 7-wire back circumference and a 4-wire back circumference having a wide size; The lower body and the upper body are formed to be combined with each other to correspond to the shoe size set in the grading step, wherein the lower body has the same length as the length having the maximum value in the size in the same group, so that the lower body in the same group is formed in the same device. And forming the upper body having the same width but having a length corresponding to the size of each shoe set in the grading step, the back circumference and the back circumference of the four wires; And processing the lower body according to the upper body formed respectively, and assembling the lower body.

In the shoe manufacturing method according to the present invention, the last set in the same group may be made of three sizes that give a deviation by one step up and down around the master size.

In the shoe manufacturing method according to the present invention, each length of the last set in the same group has a deviation of 4.23 mm based on the master size, and the 7-wire back circumference and the 4-wire back circumference are based on the master size. It can have a deviation of 3.18 mm.

When the lower body is formed in the same device in the shoe manufacturing method according to the present invention as described above, it is possible to form a display sphere for displaying the length of each corresponding size in the same group.

The present invention classifies each shoe into the same group on the basis of the master size when grading the shoe size, each of the same group to have the same width, but the 4-wire back and 7 line back to have a wide size By allowing the work to be done, the lower body used in the same group is characterized by the production of a single device. That is, according to the prior art, the length, width, seven-wire and four-wire back circumference to each other, the grading work, and the lower body having a dimension according to the grading work to produce a one-to-one application, Such a prior art has a problem that a separate device must be used to produce a lower body according to each shoe size even in a small quantity of various kinds of shoes. On the other hand, according to the present invention, although the secondary processing operations such as cutting and polishing are required when the lower body is joined to the upper body, the number of devices for the production of the lower body can be reduced when forming a small quantity of shoes. Optimally reduce the manufacturing costs of devices that require the most investment to produce shoes.

[Table 1] is a chart showing the shoe sizes classified by major countries.

 country  Size system by country United States of America 5T 6 6T 7 7T 8 8T 9 9T 10 10T 11 11T 12 12T 13 13T England 5 5T 6 6T 7 7T 8 8T 9 9T 10 10T 11 11T 12 12T 13 Korea 240 245 250 255 260 265 270 275 280 285 290 295 300 305 310 315 320 Japan 235 240 245 250 255 260 265 270 275 280 285 290 295 300 305 310 315 France 37 38 39 40 41 42 43 44 45 46 47 48

As shown in [Table 1], normal adult shoes are standardized to a certain size so as to satisfy an adult foot size of a corresponding country, and a shoe manufacturer sets shoe sizes based on such a standard. Therefore, in the manufacture of the shoe is usually completed by combining the upper and lower body produced by the corresponding size.

On the other hand, the present invention bundles the above standard system into groups, and then grading is performed for each group. In this case, referring to the US system in the specification of [Table 1], 5T, 6, and 6T are the same group, 7, 7T, and 8 are the same group, and 8T, 9, and 9T are the same group. 10, 10T, and 11 are grouped together, 11T, 12, and 12T are grouped together, and 13, 13T, and 14 are grouped together. Each of the same groups is composed of three sizes that give a deviation one by one up and down about the master sizes 6, 7T, 9, 10T, 12, and 13T in the same group, as in the method of providing deviation described later. In this way, after grading using the same group specification, one type of device for each group (here, one type does not refer to the number as a concept of producing a configuration to be applied to the same group in one device) After forming the lower body by using, processed to fit the upper body produced by each size to assemble the upper body to complete the shoe.

Meanwhile, in the present invention, the upper body generally corresponds to the upper, and the lower body is collectively referred to as various configurations for forming an insole, a midsole, an outsole, and a shoe bottom attached to the lower part of the upper.

The following [Table 2] is described in the same group consisting of 8T, 9, 9T to classify after classifying the most essential group of the present invention. In other words, in the present invention, the reason for defining a certain size in the same group is to achieve the simplification (reduction of the number) of the manufacturing equipment which is the object of the present invention. For example, in Table 2, the conventional classification is arranged to contrast with the present invention, and the concept of the master size and the method for grouping the shoe specifications as described above in the same group are the concepts presented in the present invention. .

Length (BOTTOM LENGTH) Width (BALL WIDTH) BALL GIRTH INSTEP GIRTH Remarks  Conventional 8½ 4.23 1.0 3.18 3.18 9 4.23 1.0 3.18 3.18 9½ 4.23 1.0 3.18 3.18  Invention 8½ 4.23  1.0 3.18 3.18  Master size (9) 9 4.23 3.18 3.18 9½ 4.23 3.18 3.18

As described above, the present invention makes the length of each shoe when manufacturing the shoes, the width of the shoes to be the same for each group, and the seven-wire back and four-wire back circumference to have a wide-type size, and grading work . Conventional grading work is produced by grading all sizes. Such grading has a deviation of 4.23 mm in length and 1.0 mm in width according to each size. ) Size. On the other hand, the present invention has a length of 4.23mm based on the master size of each length of the shoe set in the same group, 7-wire back and 4-wire back circumference of 3.18mm based on the master size (wide type) To have. At this time, in the present invention, the 7-wire and 4-wire dorsal circumference is to have a wide size, this reason is to compensate for the deviation in the upper body to match the width in the same group to unify the production device of the lower body To do so.

1 is a flowchart illustrating a shoe manufacturing method according to the technical idea according to the present invention.

Referring to Figure 1, the shoe manufacturing method according to the present invention comprises a grading step, the component forming step and the shoe forming step.

In the present invention, in the grading step, unlike the prior art which sets the overall size by giving the same deviation, as described above, the grading operation is performed by setting the same group around the master size. As described above, the setting of the same group is made of three sizes that give a vertical deviation around the master size. In grading, the same group has the same width, and the seven-wire and four-wire back circumferences have a wide size, and have their respective lengths.

At this time, the seven-wire back circumference (BG), referring to Figure 2, refers to the volume circumference (back circumference) to the point of 70% in the shear direction from the rear end to the length (L) of the shoe (last), ball It is referred to as ball girth. And the four-wire back circumference (IG) refers to the volume circumference (back circumference) to the point of 40% in the front end to the front end with respect to the length (L) of the shoe (last), the instep girth It is referred to.

In the present invention, the forming of the component is a step of forming the lower body and the upper body coupled to each other to correspond to the shoe size set in the grading step. The lower body in the same group is formed in the same device by having a length larger than the length having the maximum value in the size in the same group and the same width. The upper body has the same width but is formed to have a length, a seven-wire back circumference, and a four-wire back circumference corresponding to the size of each shoe set in the grading step.

In the present invention, the lower body used in the same group is formed in one device, and when assembled with the upper body, processed (cut and polished, etc.) according to the length of the upper body and assembled.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2 to 6B, and like reference numerals refer to like elements in FIGS. 2 to 6B. Meanwhile, the drawings and detailed descriptions of the configuration and operation of the general shoe manufacturing method and the necessary equipment in each drawing are briefly or omitted, and are illustrated based on the parts related to the present invention.

2 is a view for explaining a last design method according to the shoe manufacturing method according to the present invention.

Referring to Fig. 2, the design of shoes is usually made by the design of the last, and by applying the last. This last design method is applied as is the shoe manufacturing method according to the present invention as described above. That is, according to the present invention, the sizes 8T and 9T to be graded from the master size 9 designated in the design of the last 20 are set in the same group. At this time, the last belonging to the same group is to have a length (L) of the corresponding size, respectively, to have the same width (W), and the 7-wire back circumference (BG) and the 4-wire back circumference (IG) to have a wide size. Lath 20 to be graded in this manner has a length (L) corresponding to each shoe size, but in the same group will have the same width (W). At this time, the lasts set to the same group in this embodiment are composed of three sizes 8T, 9, and 9T which give a deviation by one step up and down about the master size 9 by the method described above. Each length of the lasts set to the same group has a deviation of 4.23 mm based on the master size (9), and the 7-wire back circumference (BG) and the 4-wire back circumference (IG) are based on the master size (9). Has a deviation of 3.18 mm.

The last 10 to be graded thus has a main surface 12 whose size is set by a seven-wire back circumference BG and a four-wire back circumference IG. In addition, the last 10 is formed with the bottom surface 14 which has the same width W in the same group, and each length L of the said size.

3a and 3b is a view for explaining a shoe manufacturing method according to a first embodiment of the present invention, Figures 4a and 4b is a view for explaining a shoe manufacturing method according to a second embodiment of the present invention 5A and 5B are views for explaining a shoe manufacturing method according to a third preferred embodiment of the present invention, and FIGS. 6A and 6B illustrate a shoe manufacturing method according to a fourth preferred embodiment of the present invention. It is for the drawing.

3A to 6B, when the grading operation is completed according to the design of the last 10 as described above, the lower body and the upper body are formed to be coupled to each other to correspond to the shoe size set in the grading step. At this time, the lower body 30 has a length having a maximum value in the size in the same group, and the lower body in the same group is formed in the same device by having the same width. The upper body 20 has the same width but has a length, a seven-wire back circumference, and a four-wire back circumference corresponding to the size of each shoe set in the grading step.

On the other hand, according to this embodiment, the lower body 30 commonly used in the same group sets the length when assembling with the upper body 20. Therefore, in the present embodiment, when the lower body 30 is formed in the same device, the display spheres 60 indicating the lengths of the corresponding sizes in the same group are formed so as to facilitate the processing when assembling the upper body 20 later. .

In the present invention, the formation of the lower body and the upper body is applied as usual under the technical spirit of the present invention. For example, the upper body 20 constituting the shoe is formed in a three-dimensional shape by cutting the leather or textile fabric in a developed state to fit the last (10). And the lower body 30 is mainly made through injection molding and foam molding. Therefore, what is referred to as a device in the present invention refers to a mold mainly used in injection molding and foam molding.

When the upper body 20 and the lower body 30 are prepared in this way, the lower body 30 is fabricated by processing and assembling the upper body 20, respectively, to form shoes.

Such a shoe manufacturing method of the present invention can be applied without difficulty in manufacturing shoes having a variety of configurations. For example, in the present embodiment, four forms are shown through FIGS. 3A to 6B, which are equally under the technical spirit of the present invention. Specifically, FIGS. 3A and 3B show an example of a shoe using the lower body 30 formed of only one outsole, such as casual shoes, and FIGS. 4A and 4B illustrate common jogging shoes and midsoles. An example of the shoe using the lower body 30 consisting of the 40 and the outsole 50, Figures 5a and 5b is a midsole 40 formed of high-quality materials such as EVA, such as high-quality jogging shoes (jogging shoes) Figure 6a and 6b shows an example of a shoe using the lower body 30 using the outsole 50, such as fitness shoes (fittness shoes) to the first outsole 52 and the second outsole (54) The example of the shoe which consists of the 1st midsole 42 and the 2nd midsole 44 is shown.

3A to 6B, the lower body 30 according to the present embodiment is basically formed to have the same width and length in the same device at the size in the same group, according to the last 10 as described above. A shoe is formed by combining the main surface 22 and the bottom surface 24 with each upper body 20 formed therein. At this time, the lower body 30 is subjected to secondary processing in accordance with the length of the bottom surface 24 of each upper body 20, the length is adjusted by aging the product to be injected as well as cutting and polishing in the secondary processing. It also includes a process to make. The lower body 30 whose length is adjusted through such secondary processing is coupled to the upper frame 20 formed for each size according to the present invention, and the lower body 30 is adapted to the display sphere 60 according to the structure. Are assembled.

As shown in FIGS. 3A and 3B, the lower body 30 formed by only one outsole is fitted to the length of the upper body 20 by simply processing the front and rear ends. At this time, since the display tool 60 corresponding to the size in the same group is formed in the lower body 30 according to the present embodiment, such as printing or groove, it can be easily worked. The display tool 60 is the same in the embodiments described later.

On the other hand, as shown in FIG. 4A and FIG. 4B, the lower body 30 which consists of the midsole 40 and the outsole 50 is matched with the length of the upper body 20 by processing the front-back end of the midsole 40. FIG. At this time, the outsole 50 is protruded to the upper side of the front end of the upper body 20 is attached. As described above, the front and rear ends of the midsole 40 of the lower body 30 and the front end of the outsole 50 according to the present embodiment, the display port 60 can be printed or molded {can be displayed as a groove during molding} It can be easily progressed during cutting and fitting.

Meanwhile, as shown in FIGS. 5A and 5B, the lower body 30 including the midsole 40 and the outsole 50 and the outsole 50 including the first outsole 52 and the second outsole 54 is formed. Applicable At this time, the midsole 40 is formed to have an upper portion inserted into the upper body 20 to be coupled and a lower portion located below the upper body 20. And this midsole 40 is adjusted to the length of the front end through the aging process after injection molding to fit the length of the upper body 20 is coupled to the upper body 20, the length of the rear end is inserted into the rear end of the upper body 20 By adjusting the attachment angle is coupled to be inserted into the upper body 20 to be coupled. In addition, the outsole 50 is composed of a first outsole 52 and a second outsole 54 coupled to the front and rear sides of the midsole 40, the front end of the first outsole 52 is the upper side of the front end of the upper body 20 Protrude and are attached.

6A and 6B, the outsole 50 includes the first outsole 52 and the second outsole 54, and the midsole 40 includes the first midsole 42 and the second midsole ( The lower body 30 which consists of 44 is applicable. At this time, the first midsole 42 of the midsole 40 is inserted into the inside of the upper body 20 from the front side, and the second midsole 44 is located below the upper body 20 and coupled to the rear side. The lower body 30 having such a midsole 40 is matched with the length of the upper body 20 by adjusting the coupling position of the first midsole 42 and the second midsole 44. In addition, the first outsole 52 of the outsole 50 is joined while covering the coupling surface of the first midsole 42 and the second midsole 44 on the bottom surface of the first midsole 42, and is coupled to the upper body 20. do. At this time, the first outsole 52 is length-adjusted on the lower surface of the second midsole 44 to be aligned with the front end of the upper body 20. The second outsole 52 is coupled to the bottom surface of the second midsole 44.

As described above, the shoe manufacturing method according to a preferred embodiment of the present invention is shown in accordance with the above description and drawings, but this is merely described for example, various changes and modifications within the scope without departing from the technical spirit of the present invention. It will be appreciated by those skilled in the art that this is possible.

According to the shoe manufacturing method according to the present invention, the length of each shoe when manufacturing the shoes, the width of the shoes to be the same for each group, the 7-wire back and 4 wire back to have a wide type size Allow grading to take place. Therefore, insoles, midsoles, outsoles, and other accessories, which are mainly formed using devices such as injection molds, can be produced as a single device for each group, thereby reducing the devices required to produce shoes of all sizes, and in small quantities. Efficiency can be provided in the provision of shoes.

Claims (11)

In the shoe manufacturing method, In the design of the shoes, the grades to be graded from the designated master size are set in the same group, and the shoes in the same group should have the same width but the same width, and the 7-wire back and 4-wire backs have the wide size. Grading; The lower body and the upper body are formed to be coupled to correspond to the shoe size set in the grading step, wherein the lower body has a length greater than the length having a maximum value in the size of the same group and the same width so that the lower body in the same group is the same Forming in the device, the upper body having the same width but having a length, a seven-wire back circumference, and a four-wire back circumference corresponding to the size of each shoe set in the grading step; Shoe manufacturing method comprising the step of assembling the lower body by processing the respective upper body formed. The method of claim 1, The same group is a shoe manufacturing method, characterized in that consisting of three sizes to give a step by step up and down around the master size. The method of claim 2, Each length of the shoe set in the same group has a deviation of 4.23 mm based on the master size, and the 7-wire back circumference and the 4-wire back circumference have a deviation of 3.18 mm based on the master size. How to make shoes. The method according to any one of claims 1 to 3, When the lower body is formed in the same device, the shoe manufacturing method characterized in that to form a display sphere for indicating the length of each corresponding size in the same group. The method of claim 4, wherein The lower body is to have a midsole and an outsole, The midsole is processed to front and rear ends to fit the length of the upper body, The outsole is a shoe manufacturing method characterized in that to protrude to the upper side of the front end of the upper body to be attached. The method of claim 4, wherein The lower body is to have a midsole and an outsole, Since the midsole is formed by injection molding, the length of the front end is adjusted through aging, and the length of the rear end is adjusted to the length of the upper body by adjusting the attachment angle at which the rear end of the upper body is inserted and coupled. The outsole is made of a first outsole and a second outsole coupled to the front and rear sides of the midsole, the front end of the first outsole is characterized in that the shoe protruding to protrude to the upper side of the front end of the upper body. The method of claim 4, wherein The lower body is to have a midsole and an outsole, The midsole is provided with a first midsole and a second midsole coupled to the front and rear sides of the upper body, the first midsole and the second midsole is adjusted to match the length of the upper body by adjusting the bonding position overlapping each other in the middle, The outsole is a shoe manufacturing method characterized in that it comprises a first outsole coupled to the lower surface of the first midsole, and a second outsole coupled to the lower surface of the second midsole. In the shoe manufacturing method, In the design of the last, the sizes to be graded from the designated master size are set to the same group, and the last belonging to the same group should have the same length but the same width, and the 7-wire back and the 4-wire back are wide. Grading a last corresponding to each shoe size to be produced by having a mold size; The lower body and the upper body are formed to be combined with each other to correspond to the shoe size set in the grading step, wherein the lower body has the same length as the length having the maximum value in the size in the same group, so that the lower body in the same group is formed in the same device. And forming the upper body having the same width but having a length corresponding to the size of each shoe set in the grading step, the back circumference and the back circumference of the four wires; Shoe manufacturing method comprising the step of assembling the lower body by processing the respective upper body formed. The method of claim 8, Last set in the same group is a shoe manufacturing method characterized in that consisting of three sizes to give a deviation by one step up and down around the master size. The method of claim 8, Each length of the last set in the same group has a deviation of 4.23 mm based on the master size, and the 7-wire back circumference and the 4-wire back circumference have a deviation of 3.18 mm based on the master size. How to make shoes. The method according to any one of claims 8 to 10, When the lower body is formed in the same device, the shoe manufacturing method characterized in that to form a display sphere for indicating the length of each corresponding size in the same group.

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