KR102330234B1 - Method of manufacturing midsole for footwear in which air chamber is formed during molding process and midsole thereof - Google Patents

Abstract

A method of manufacturing a midsole including at least one air chamber includes: arranging a lower pad having at least one lower groove formed thereon in correspondence to the position of the air chamber in a lower mold; and covering the plate-shaped groove cover corresponding to the lower groove. and curing the upper mold placed on the lower mold and the pad material in a fluid state provided between the upper mold and the lower pad to complete the molding of the midsole.

Description

A midsole manufacturing method and midsole that forms an air chamber at the same time as molding

The present invention relates to a midsole of a shoe, and more particularly, to a midsole in which an air chamber is integrally molded through a molding process rather than adhesion, and a method for manufacturing the same.

The midsole of a shoe is an accessory for absorbing shock, and is generally provided between the sole and the upper, and functions to complete the overall flat shape of the shoe and provide a cushioning effect to the user.

In order to impart cushioning or elasticity to the midsole, the need to form an air chamber inside the midsole continues to evolve.

As an example, FIG. 1 is a view for explaining a shoe in which the shock absorbing member disclosed in the related art Korean Patent Registration No. 10-0920630 can be replaced.

Referring to FIG. 1 , the shoe provides a tight sole 100 having an empty space portion 110 formed therein, a first midsole of the midsole is foam-molded in a first molding process, and a second midsole and an outsole are formed in a second molding process. After foam molding, a midsole is produced through an attachment process in which they are attached to each other. However, this attaching process is very unstable, and there is a risk that the attached part may be damaged or burst if it has to support up to 4 to 5 times the user's weight.

2 is a view for explaining a midsole having an air cushion function disclosed in the conventional Korean Utility Model No. 20-0168171.

Referring to FIG. 2 , the midsole is intended to form a closed space by itself without an air pack built in. The sealing sheets 20 and 30 are vertically placed around the midsole 10 having a hole 13 formed therein with an industrial adhesive or high frequency It contains the contents of gluing by adhesive. This also has a disadvantage in that the bonded part is very unstable, and it is not aesthetically good because the bonded part is exposed from the outside.

3 is a view for explaining a shoe sole having an independent airtight seal disclosed in the conventional Korean Patent Registration No. 10-0205673.

Referring to FIG. 3 , the sole is also for obtaining a good cushioning function without an air tube, and after pre-molding the first molded part 100 and the second molded part 200 into a semi-vulcanized product, complete vulcanization in the mold It includes the process of integrating it into a product. Although the vulcanization process has the advantage of superior adhesion compared to the above-described attachment or adhesion, there is a problem in that position calibration is difficult and the process is difficult in that the first and second molded parts already formed as semi-finished products must be handled and these must be attached.

4 is a view for explaining a method of manufacturing a shoe sole disclosed in the related art Korean Patent Application Laid-Open No. 1999-0062037.

Referring to FIG. 4 , although the process of forming the sole of the sneaker at once is included, this method is only possible with a structure in which the side of the midsole is penetrated, and there is a limit to forming an air chamber having a completely sealed structure.

The present invention provides a method for manufacturing a midsole that forms a completely sealed air chamber without an air pack or an air cushion, and a midsole according thereto.

The present invention provides a method for manufacturing a midsole for forming a closed air chamber through integral molding rather than a method such as adhesion or fusion, and a midsole according thereto.

The present invention provides a midsole manufacturing method for producing a product integrated in a mold through molding using a raw material, rather than attaching the semi-finished products or semi-vulcanized products up and down and then attaching them, and a midsole according thereto.

The present invention provides a method for manufacturing a midsole capable of forming a complete integral and adhesion by forming a stable air chamber through molding of a raw material, and a midsole accordingly.

According to an exemplary embodiment of the present invention for achieving the above-described objects of the present invention, the method for manufacturing a midsole including at least one air chamber is a lower pad in which at least one lower groove is formed corresponding to the position of the air chamber. Forming the midsole by disposing the in the lower mold, covering the plate-shaped groove cover corresponding to the lower groove, and curing the upper mold placed on the lower mold and the pad material in a fluid state provided between the upper mold and the lower pad including the steps of completing

The lower pad and the pad material may be formed using a polyurethane-based resin, and are preferably formed of the same material, but do not necessarily have to be formed as such. In addition, in addition to the polyurethane-based resin, it may be formed of a material used in general footwear such as pylon.

The groove cover may also be formed using a polyurethane-based resin, and may be formed in various ways like the lower pad.

A mounting groove for accommodating the edge of the groove cover is formed around the upper end of the lower groove, and the groove cover may be fixed to the mounting groove.

The groove cover may be formed to cover two or more lower grooves at the same time, or a groove cover including two or more upper protrusions may be provided on one lower groove.

According to an exemplary embodiment of the present invention for achieving the above-described objects, a midsole including at least one air chamber, a lower pad including at least one lower groove corresponding to the air chamber, a lower groove It may include a plate-shaped groove cover located on the upper portion of the , and an upper pad that is formed directly on the lower pad and is integral with the lower pad.

According to the midsole manufacturing method of the present invention, it is possible to form a completely sealed air chamber without an air pack or air cushion.

According to the midsole manufacturing method of the present invention, by forming an airtight air chamber through integral molding rather than bonding or fusion, it is possible to form an air chamber that is strong and can fundamentally block the inflow of air.

In the midsole manufacturing method of the present invention, it is possible to produce an integrated product in a mold through molding using a raw material, rather than attaching the semi-finished product or semi-vulcanized product after adhering them.

The midsole manufacturing method of the present invention can form a complete integral and adhesion by forming a stable air chamber through the molding of the raw material.

1 is a view for explaining a shoe in which the shock absorbing member disclosed in the conventional Korean Patent Registration No. 10-0920630 can be replaced.
2 is a view for explaining a midsole having an air cushion function disclosed in the conventional Korean Utility Model No. 20-0168171.
3 is a view for explaining a shoe sole having an independent airtight seal disclosed in the conventional Korean Patent Registration No. 10-0205673.
4 is a view for explaining a method of manufacturing a shoe sole disclosed in the related art Korean Patent Application Laid-Open No. 1999-0062037.
5 is a view for explaining the three-dimensional structure of the midsole according to an embodiment of the present invention.
FIG. 6 is an exploded view of the midsole of FIG. 5 and a method of manufacturing the same.
FIG. 7 is a view for explaining a method of manufacturing the midsole of FIG. 5 .
8 is a view for explaining a method of manufacturing a midsole according to an embodiment of the present invention.
9 is a view for explaining a method of manufacturing a midsole according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and contents described in other drawings under the above rules may be cited and described, and contents determined to be obvious to those skilled in the art or repeated may be omitted.

5 is a view for explaining the three-dimensional structure of the midsole according to an embodiment of the present invention, FIG. 6 is an exploded view of the midsole to explain the midsole of FIG. 5 and a method of manufacturing the same, and FIG. 7 is a view of FIG. It is a view for explaining the manufacturing method of the midsole.

5 to 7 , the midsole 100 according to the present embodiment may have the same structure as a general shoe or a sole structure of a shoe. However, protrusions may be formed in the upper portion of the midsole 100 to correspond to the heel of the hindfoot and the bottom of the forefoot corresponding to the position of the air chamber R, and an air chamber R may be formed in the lower portion of the protrusion. have.

To this end, the midsole 100 includes a lower pad 110 including a first lower groove 112 formed in the heel portion and a second lower groove 114 formed in the forefoot bottom portion to correspond to the air chamber R, the first The plate-shaped first groove cover 120 positioned on the lower groove 112 , the plate-shaped second groove cover 130 positioned on the second lower groove 114 , and the lower pad 110 , immediately The upper pad 140 formed integrally with the lower pad 110 may be provided.

In order to form the midsole 100 , a lower mold and an intermediate mold may be provided, and the lower mold and the intermediate mold may be provided in various shapes corresponding to the illustrated lower pad 110 .

First, as shown in FIG. 7A , a lower pad 110 may be formed, and a first lower groove 112 and a second lower groove 114 may be formed in the lower pad 110 . Of course, it is also possible that only one lower groove is formed corresponding to the heel or the forefoot, or the arch portion.

A polyurethane-based resin may be used to form the first lower groove 112 and the second lower groove 114 , and may be formed of a material having a certain degree of hardness, such as a shoe sole.

After the lower pad 110 is formed, the first lower groove 112 and the second lower groove 114 may be covered using the plate-shaped first groove cover 120 and the second groove cover 130 , respectively. As shown, the first groove cover 120 may be formed in an elliptical shape that corresponds to the shape of the first lower groove 112 and is connected as a whole to a round cover shape, and the second groove cover 130 is formed by a single first groove. 2 It may be provided in a shape including a plurality of convex upper protrusions 132 corresponding to the lower grooves 114 .

As shown in (b) of FIG. 7 , the lower pad 110 may be maintained on the lower mold as it is, and in a state where only the middle mold is removed, the first groove cover 120 and the second groove cover 130 are formed in the lower groove. may be provided to cover the

Referring to FIG. 7C , the first groove cover 120 and the second groove cover 130 are respectively fixed to the first lower groove 112 and the second lower groove 114 on the upper pad. An upper mold for forming the 140 may be provided, and the upper pad 140 may be directly formed in a state in which the lower pad 110 and the first and second groove covers 120 and 130 are present.

At this time, a space for molding may be defined by the upper mold placed on the lower mold, the lower pad 110 , and the first and second groove covers 120 and 130 , and a fluidized pad material is introduced or compressed therebetween. And through a curing process, the upper pad 140 may be integrally molded.

The lower pad 110 and the pad material are preferably formed using the same polyurethane-based resin, but are not necessarily limited thereto. In addition, the first groove cover 120 and the second groove cover 130 form an air chamber R together with the first lower groove 112 and the second lower groove 114 , thereby forming the upper pad 140 . It is possible to prevent the air chamber (R) from being deformed or pressed during the molding process.

Of course, there are cases where it is formed using semi-finished products or semi-cured products, but in this case, the upper pad 140 is formed from the beginning in that the portion corresponding to the upper pad is already formed and adhesion occurs only at the interface thereof. The midsole 100 according to the example manufacturing method may form an air chamber R having a more complete and excellent sealing force.

The first groove cover 120 and the second groove cover 130 may also be formed of a polyurethane-based resin or a stronger and more heat-resistant material so as not to be pressed, and the upper portion of the dome structure corresponding to the air chamber R A protrusion 132 may be formed.

In addition, in the lower pad 110 , an indent 116 for forming the upper pad 140 may be formed as a whole.

8 is a view for explaining a method of manufacturing a midsole according to an embodiment of the present invention.

According to the process of (a) to (c) of Fig. 8, as shown in Fig. 3, the lower pad 210 is molded, the lower pad 210 located in the lower mold is defined with a first lower groove 212, A plate-shaped first groove cover 220 having a dome structure is provided on the first lower groove 212, and in a state where the first groove cover 220 is temporarily fixed, the upper pad is used instead of the middle mold by using the upper mold. The process of forming 240 can be understood.

In this embodiment, a mounting groove 216 for accommodating all or part of the edge of the first groove cover 220 may be formed around the upper end of the first lower groove 212, and the first groove cover 220 is It may be fixed to the mounting groove 216 . The first groove cover 220 may be firmly fixed by the mounting groove 216 , and may block the pad material from flowing into the air chamber R in the process of forming the upper pad 240 .

9 is a view for explaining a method of manufacturing a midsole according to an embodiment of the present invention.

In contrast to the second groove cover 130 having a plurality of dome-structured upper protrusions 132 corresponding to one second lower groove 114 in the embodiment of FIG. 2 provided, in FIG. 9 , the second lower groove ( 314 may also be provided separately from the upper protrusion 332 .

That is, by providing the second groove cover 330 including the plurality of upper protrusions 332 in the plurality of second lower grooves 314 , a plurality of separated air chambers may be formed. Through this, a structure having a small air chamber can be formed, and it is also possible to simultaneously form the second groove cover 330 using a single second groove cover 330 . Of course, a flow path may be formed on the bottom surface of the second groove cover 330 to selectively connect the air chambers.

The upper pad 340 may be formed on the second groove cover 330 , and may be provided in a protruding shape corresponding to the upper protrusion 332 , as shown, or may be provided flat without a protruding shape. may be

As described above, although described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the following claims. You will understand that it can be done.

100: midsole 110: lower pad
112: first lower groove 114: second lower groove
120: first home cover 130: second home cover
140: upper pad

Claims (10)

A method for manufacturing a midsole comprising at least one air chamber, the method comprising:
disposing in a lower mold a lower pad including at least one lower groove formed by being concavely indented from an upper surface of the pad body to correspond to the position of the pad body supporting the sole and the air chamber;
covering the plate-shaped groove cover corresponding to the lower groove; and
Completing the molding of the midsole by curing the upper mold placed on the lower mold and the pad material in a fluid state provided between the upper mold and the lower pad;
The pad material is cured to form an upper pad, and the upper pad is directly connected to the lower pad around the groove cover to form an integral body. According to claim 1,
The midsole manufacturing method, characterized in that the lower pad and the pad material is formed using a polyurethane-based resin. 3. The method of claim 2,
The midsole manufacturing method, characterized in that the groove cover is also formed using a polyurethane-based resin. According to claim 1,
A mounting groove for accommodating the edge of the groove cover is formed around the upper end of the lower groove, and the groove cover is fixed to the mounting groove. According to claim 1,
The method of manufacturing a midsole, characterized in that the groove cover can cover two or more of the lower grooves at the same time. A midsole comprising at least one air chamber,
a lower pad including a pad body supporting the sole and at least one lower groove formed by being concavely indented in an upper surface of the pad body to correspond to the air chamber;
a plate-shaped groove cover positioned above the lower groove; and
and an upper pad formed directly on the lower pad and integral with the lower pad;
The midsole, characterized in that the upper pad is directly connected to the lower pad in the periphery of the groove cover to form an integral body. 7. The method of claim 6,
The midsole, characterized in that the lower pad and the upper pad is formed using a polyurethane-based resin. 8. The method of claim 7,
The midsole, characterized in that the groove cover is also formed using a polyurethane-based resin. 7. The method of claim 6,
A mounting groove for accommodating the rim of the groove cover is formed around the upper end of the lower groove, and the rim of the groove cover is accommodated along the mounting groove. 7. The method of claim 6,
The midsole, characterized in that the groove cover covers at least two of the lower grooves at the same time.

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