KR20020014022A - Method for and making of phylon midsole on air bag - Google Patents

Abstract

PURPOSE: A phylon mid sole comprising air bag therein and its concurrent forming method are provided which offers a super lightweight phylon mid sole formed so as to make an air bag be directly seen from outside. CONSTITUTION: In the concurrent forming method, the lightweight sponge is cut into a top sheet(10), a back sheet(20) and a rim sheet(14), respectively, and a hole is made on the rim sheet(14) so as to make an air bag(12) be directly seen from outside. The top/back sheets(10,20), the rim sheet(14) and the air bag(12) are adhered together, and a molding(18) is inserted into the hole of the rim sheet(14). The half-finished product obtained in this way, is introduced into a conventional mold and compression molded by heating and cooling in press. The molding(18) is removed from the rim sheet(14) to obtain a finished product of a phylon mid sole comprising the air bag therein.

Description

Pylon midsole with air bag and simultaneous molding method {METHOD FOR AND MAKING OF PHYLON MIDSOLE ON AIR BAG}

The present invention relates to a pylon midsole for shoes, and more particularly to a method of co-molding the pylon midsole so that the air bag inserted in the pylon midsole can be seen from the outside.

In general, the sole is inserted into a mold of a certain shoe size in order to lighten the weight, and then compacted, and the molding is completed by heating for a limited time, the sole manufactured by such a process is a Pylon Mid Sole It is called).

Dividing the manufacturing process to be completed in this way, the mixer (mixing agent, additives (crosslinking agent, reinforcing agent, thermal stabilizer, foaming agent, softener, etc.) to EVA (ethyl vinyl acetate) and LDPE (low density polyethylene), the raw material of the sponge Then, it is molded into a midsole sponge sheet (hereinafter referred to as " EVA sponge sheet ") by pressing, and then skived it again and then cut into a predetermined shape. After grinding, the surface and circumference of the finished E.V.A sponge are ground and then pressed into a mold and pressed, followed by finishing operations. The pylon midsole, which has the following idea, is washed with clean water to remove impurities such as release agents during operation.

On the other hand, the pylon midsole that went through the above-described process is put into the air bag (preparation process) and the sole of the sole, in detail, dipping for about 2 to 3 minutes with a chemical such as toluene, and then It is dried again and UV irradiation is performed. The pylon midsole is applied to the UV irradiation after applying a solution such as UV primer (Primer) to improve the adhesive force, the pylon midsole and the airbag and the sole using a buffing (Buffing M / C) to increase the adhesion efficiency Each of the ping process.

After the above-mentioned adhesion preparation process is completed, the adhesive solvent is first applied to each adhesive portion of the midsole, the airbag and the sole, and then dried for about 7 minutes, and then the adhesive solvent is secondly applied, followed by drying for about 10 minutes. After adhering the adhesive parts of the midsole, the airbag and the sole to each other, they are compressed using a press or the like to complete the shoe sole.

However, the conventional shoe manufacturing process as described above contains many problems as follows.

First, the pylon midsole and airbags and soles go through a number of separate processes as described above, and the soles of the pylon midsole, airbag and sole are bonded to each other to manufacture soles, thus consuming excessive work equipment and time, as well as unnecessary work. It has the disadvantage of requiring manpower.

Secondly, the time and dry condition of dipping with chemicals such as toluene, the heat, temperature, time and puffing state during UV irradiation, and the bonding process of pylon midsole and sole by manual labor are the main causes of product defects. In particular, due to the increase in the work process, productivity is significantly reduced and the cost of the product is increased.

Third, the Pyron midsole molded by the above-described method has a disadvantage in that the reliability of the product is reduced because the air bag is not seen from the outside, and the design of the shoe is not beautiful.

Meanwhile, in order to solve the above-mentioned third problem, since the rear part of the midsole into which the airbag is inserted is made of PE or PU, and the front part is made of EVA resin, and then bonded to each other, the pylon midsole is also formed. This resulted in an increase of, and in particular a problem of the weight of the midsole being much higher than in the prior art.

On the other hand, the rear part of the midsole into which the airbag is inserted is divided into the upper and lower parts, respectively, and then compression molded, and then the airbags are inserted therebetween, and the method of adhering them again is adopted. In addition, productivity increases due to the increased manufacturing process and still suffers from the heavy weight of the midsole.

Accordingly, a first object of the present invention for solving the above problems is to provide a pylon midsole and a method for forming the same so that the airbag can be directly seen from the outside.

It is a second object of the present invention to provide an ultralight pylon midsole in which an air bag is inserted.

It is a third object of the present invention to provide a method of forming a pylon midsole which is light in weight and at the same time the airbag inserted into the midsole can be identified.

A fourth object of the present invention is to provide a method of forming a pylon midsole by simultaneously molding an air bag and an E.V.A sponge sheet.

The present invention according to the first aspect for achieving the above object is to cut the EVA sponge into the upper sheet, the lower sheet and the rim sheet, respectively, to resemble the shape of the midsole, so that the airbag is visible from the outside of the rim sheet After the hole is formed, the upper and lower sheets and the edge sheet and the airbag are adhered to each other, and then a mold is inserted into the hole of the edge sheet. After compression molding, the present invention proposes a method for forming an air bag-inserted pylon midsole, which comprises a process of forming the finished product of the pylon midsole by removing the mold from the edge sheet.

1 is a flow chart illustrating a method of forming a pylon midsole so that the airbag inserted into the pylon midsole according to an embodiment of the present invention can be seen from the outside.

FIG. 2 is an exploded perspective view showing parts of a method for forming the pylon midsole shown in FIG.

3 is a perspective view of a pylon midsole in which an air bag made by the molding method shown in FIG. 1 is inserted;

4 is a cross-sectional view taken along the line “A-A” of FIG. 2.

5 is an exploded perspective view showing parts of a method for forming a pylon midsole according to another embodiment of the present invention.

6 is a perspective view of a pylon midsole made by the molding method shown in FIG.

<Description of the symbols for the main parts of the drawings>

10: upper seat 12, 34: air bag

14: border sheet 16a, 16b: hole

18: mold 20: lower sheet

30: E.V.A Sponge Sheet 32: Secondary Sheet

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the accompanying process drawings and perspective views. It should also be noted that in the following description, only parts necessary for understanding the molding method of the present invention will be described, and descriptions of other parts will be omitted so as not to obscure the subject matter of the present invention. Terms to be described later are defined in consideration of functions in the present invention, which may vary according to intention or custom of a user or a manufacturer, and the definitions should be made based on the contents throughout the present specification.

First of all, the concept of the molding method proposed by the present invention is to cut the EVA sponge sheet into three parts, insert the aluminum material into the part corresponding to the side surface of the midsole, and simultaneously compress the airbags with these to the outside. Will propose a method of forming a pylon midsole so that the airbag inserted into the midsole can be easily visually identified.

According to an embodiment of the present invention, the molding method of the previously proposed air bag-inserted pylon midsole is as shown in FIGS. 1 to 4. Referring to the drawings, the molding method to be implemented in the present invention first press the ethylene vinyl acetate copolymer resin (Ethylene Vinylacetate Copolymer) (hereinafter referred to as "EVA resin") and chemicals, dyes, etc. ) To make EVA sponge sheet. Next, after skiving the E.V.A sponge, it is cut into a predetermined type. On the other hand, since this initial process is already well-known technology, a detailed description thereof will be omitted.

At this time, the skiing of the above-described EVA sponge (SKI) process to be pressed and pressed at the same time as the air bag and the skied EVA sponge as shown in Figure 2 the upper sheet 10 and the lower sheet 20 and After cutting with a rim sheet 14, which forms the wings of the midsole, and sequentially bonding them with the airbag 12 according to the inherent characteristics of the shoe, the grinding operation is performed. On the other hand, both sides of the above-mentioned edge sheet 14 are formed with holes 16a and 16b having a predetermined size, and these holes 16 are for allowing the airbag 12 inserted into the pylon midsole to be directly visually checked from the outside. to be.

Subsequently, the mold 18 having good thermal conductivity is inserted into the resultant (hereinafter referred to as "pylon midsole semi-finished product"), which is preferably formed in the holes 16a and 16b formed on both sides of the edge sheet 14. . At this time, the mold 18 is designed such that the airbag is visible from the outside even if the developer or the buyer requires any form of the airbag for the exposure of the airbag 12, and aluminum is most preferable as the material. At this time, it is a natural reason that the shape of the hole 16 formed in the edge sheet 14 also depends on the shape of the mold 18 described above.

Subsequently, the semi-finished product of the above-described mold 18 into which the pylon midsole is inserted is put into a conventional midsole mold, and then press-molded in a press for 6 to 15 minutes for heating and 6 to 15 minutes for cooling. To complete.

For reference, the airbag 12 inserted into the pylon midsole of the present invention is PP, PE, PU, resin raw materials, chemicals, dyes, etc. in a proper blending ratio through a rolling process (Rolling) sheeting (Calender) sheet Then, it is pressed to a predetermined shape through a cutting process or by using an air generating device called a compressor (Compresser M / C) through the extrusion process is produced to exert elasticity.

Hereinafter, the present invention will be described in detail based on the preferred embodiment of the present invention, but the present invention is not limited to the embodiment.

{Example 1}

After preparing an EVA sponge sheet and an air bag made by a conventional manufacturing method, and then skiving the EVA sponge, as shown in Figure 2 into the upper sheet 10, lower sheet 20 and the edge sheet 14 Each was cut. At this time, the edge sheet 14 is formed with an elliptical hole (16a, 16b).

Thereafter, the airbag 12 is inserted between the upper sheet 10 and the lower sheet 20, and then first bonded to each other, and then the edge sheet 14 is placed along the sides of the upper and lower sheets 10 and 20. After gluing, grinding was performed. Next, the mold 18 is inserted into the holes 16a and 16b of the edge sheet 14, and then, the mold 18 is inserted into a midsole mold, and then press-molded for 6 to 15 minutes by heating and 6 to 15 minutes by cooling. To form a pylon midsole incorporating an airbag.

{Example 2}

After preparing an EVA sponge sheet and an air bag made by a conventional manufacturing method, and then skiving the EVA sponge, as shown in Figure 2 into the upper sheet 10, lower sheet 20 and the edge sheet 14 Each was cut. At this time, the edge sheet 14 is formed with an elliptical hole (16a, 16b).

Thereafter, the edge sheet 14 was adhered along the side surface of the lower sheet 20, and then, the rim sheet 14 was put into a mold for a general midsole, and then the airbag 12 was inserted therein. Thereafter, the upper sheet 10 prepared in advance is pasted and placed on the lower sheet 20 into which the air bag 12 is inserted. Then, the press is press-molded in a press for 6 to 15 minutes and 6 to 15 minutes for cooling. The pylon midsole was completed.

{Example 3}

An E.V.A sponge sheet 30 and an airbag 34 made by a conventional manufacturing method were prepared, and a mold for forming a midsole having grooves was prepared to allow the airbag 34 to be placed.

Subsequently, as shown in FIG. 5, an adhesive is applied to the upper and lower surfaces of the airbag 34 described above, and then the auxiliary sheet 32 is first introduced into the mold for the midsole, and then the airbag 34 is placed thereon. The above-mentioned EVA sponge sheet 30 was placed thereon, and then it was press-molded for 6 to 16 minutes by heating in a press and 6 to 16 minutes by cooling to complete a pylon midsole incorporating an air bag.

On the other hand, the above-described auxiliary sheet 32 is to maintain the bottom surface of the midsole in a subsequent process, that is, when the pylon midsole and the sole are bonded, and also serves to prevent the expansion of the airbag during compression molding.

As described above, the molding method of the pylon midsole in which the airbag is inserted according to the embodiment of the present invention achieves many effects as follows.

First, the present invention can directly check the airbag inserted inside the pylon midsole from the outside, in particular the shape of the transparent window (hole) for the airbag can be molded into various shapes, which is a product from consumers or buyers It also has the advantage of instilling the trust of people and changing the design of the shoes in various ways.

Secondly, the present invention can shorten the manufacturing process by compressing the air bag and the E.V.A sponge at the same time, and also has the advantage of reducing the work time and the number of workers.

Third, the present invention can prevent the environmental pollution by toluene and the like by omitting the dipping step and the stepping step, and also has the advantage that can always implement a clean working environment.

Fourthly, the present invention is not only lighter than conventional midsoles, but also has an increased effect of producing sneakers with built-in airbags, by using a EVA resin and simultaneously molding pylon midsoles for the airbags to be seen from the outside. have.

Claims (9)

In the method of forming a pylon midsole made of a sponge made of lightweight material and having an air bag 12 inserted therein, The sponge is cut into an upper sheet 10, a lower sheet 20, and an edge sheet 14 so as to be similar to the shape of the midsole, and the airbag 12 is visible from the outside of the edge sheet 14. Forming a hole (16); Bonding the upper / lower sheets (10,20) to the edge sheets (14) and the airbag (12), and then inserting a mold (18) into the holes (16) of the edge sheets (14); After the semi-finished product has been put into a conventional mold, it is compression molded by a heating and cooling process in a press, and then the mold 18 is removed from the edge sheet 14 to manufacture a finished product of pylon midsole. Simultaneous molding of a pylon midsole with an air bag inserted therein. The method of claim 1, wherein the sponge is made of ethylene vinyl acetate copolymer as a main raw material. According to claim 1, wherein the airbag 12 between the upper sheet 10 and the lower sheet 20 is first bonded, and then the edge sheet 14 along the sides of the upper / lower sheet 10 Simultaneous molding of the air bag is inserted pyron midsole, characterized in that the secondary bonding process. The method of claim 1, wherein after the rim air bag 14 is first bonded along the side surface of the lower sheet 20, the air bag 12 is secondly bonded to the upper surface of the lower sheet 20, and then the upper portion is Simultaneously bonding the sheet 10 to the upper surface of the lower sheet 20, the method of co-molding the pylon midsole with the air bag inserted, characterized in that made. 5. Method according to any one of the preceding claims, characterized in that the mold (18) is formed of an aluminum material. A pylon midsole in which an air bag molded by the method of any one of claims 1 to 4 is inserted. In the method for producing a pylon midsole by compression molding the E.V.A sponge sheet 30 and the airbag 34, Preparing a midsole mold in which a groove is formed so that the airbag 34 can be placed, and an auxiliary sheet 32 surrounding the bottom surface of the airbag 34; Applying an adhesive to the upper and lower surfaces of the airbag 34, The auxiliary sheet 32, the airbag 34 and the EVA sponge sheet 30 are sequentially added to the midsole mold, and then heated and cooled in a press to form a pylon midsole. Simultaneous molding of pylon midsole with air bag inserted. 8. The method according to claim 7, wherein the auxiliary sheet (32) is made of the same material as the E.V.A sponge sheet (30). A pylon midsole in which an airbag molded by the method of claim 7 or 8 is inserted.