KR20010095953A - Molding method of footwear in-sole - Google Patents

Abstract

PURPOSE: A method for molding an inner sole of shoes is provided to simplify the process of molding and to minimize the number of workers by omitting the cutting step of large sponge and the rim treatment step of the inner sole. CONSTITUTION: The molding method for an inner sole of shoes comprises the steps of: molding the inner sole of rough shape by pouring ethylene-vinyl acetate copolymers into a primary mold having a temperature of 140 to 180deg.C; heating the inner sole of rough shape in a heat chamber or an oven having a temperature of 100 to 200deg.C; and again pouring the inner sole into a secondary mold, and pressing it by a cooling press to mold the inner sole of fine shape. Alternately, the final step is performed by pressing a foam attained from the primary molding step in the secondary mold, and heating the pressed foam up to 100 to 200deg.C, and finally heating/cooling it without using the cooling press.

Description

Molding method of shoe insole {MOLDING METHOD OF FOOTWEAR IN-SOLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe insole molding method, and more particularly, to a shoe insole molding method that can reduce the work process to the maximum.

In general, the insole (soak liner or in-sole) laid on the bottom of the shoe has a slight difference depending on the use of the shoe, but the quality difference is distinguished according to the functional superiority such as elasticity and resilience, moldability, breathability.

Meanwhile, as the material of the insole, polyurethane, latex, a copolymer of ethylene and vinyl acetate, an ethylene alpha olefin copolymer, and the like are used, and a detailed description of the insole using these materials is omitted since it is a well known technique. Let's do it. In addition, such a manufacturing method is described in detail in Korean Patent Publication No. 88-50 (manufacturing method of shoe insole) and Publication No. 91-9200 (manufacturing method of shoe insole). It is also described in detail in Korean Patent Publication No. 93-11208 (Method for manufacturing shoe insole based on latex).

However, the above-described shoe insoles go through a number of processes in the molding method, resulting in an increase in molding time and an increase in manufacturing cost.

That is, in the conventional insole molding method, a large number of sponges are turned on (cut) in the thickness direction, and then cut into a shape of an insole, and then processed again using a separate processing apparatus, and then put them back into a mold. A shoe insole was produced by pressing with a hot press or a cooling press, or heated in an oven, and then pressurized with a cooling press to produce a shoe insole.

Therefore, this molding method has a five-step molding process, which increases the molding time and requires a lot of workers, in particular, it is expected that the disadvantages of the economic burden of consumers due to the increase in manufacturing costs.

Accordingly, an object of the present invention for solving the above problems is to provide a method for forming a shoe insole that can omit the cutting process of the large sponge and the processing of the insole rim.

Another object of the present invention is to provide a shoe insole molding method that can simplify the molding process and minimize the number of workers.

The present invention according to the first aspect for achieving the above object is added to the primary mold of 140 ~ 180 ℃ ethylene vinyl acetate copolymer to form an insole of the rough shape, and then it is 100 ~ 200 ℃ It is heated in an oven or a heat chamber, and then put into a secondary mold and pressurized with a cooling press to form fine shoe insoles, or pressurized with a foam molded from the primary mold into the secondary mold and then pressurized to 100 to The present invention proposes a molding method of a shoe insole consisting of a process of heating and cooling the mold as it is, without heating to 200 ° C., and then molding.

Hereinafter, preferred embodiments of the present invention will be described in detail. In addition, it should be noted that in the following description, only parts necessary for understanding the insole 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.

First of all, the molding method of the shoe insole to be proposed in the present invention omits the operation of turning on the large sponge in several sheets and processing the insole rim surface, and at the same time makes a roughly insole shape using the foam molding method. It is pressurized again with a hot press and a cold press to form a completely fine shoe insole.

At this time, polyurethane or latex or the like is used as a material for the shoe insole, and in particular, an ethylene vinyl acetate copolymer (hereinafter referred to as "EVA") or an ethylene alpha olefin copolymer is preferable.

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 a primary mold for roughly forming the shape of a shoe insole, and then adding an EVA compound to it, it is heated at a temperature of 155 ℃, and then the approximate primary foam for insole made from the primary mold is taken out. It was. Then, it was put again in the secondary mold, and then pressurized with a hot press at a temperature of 155 ℃. At this time, the secondary mold is manufactured to make the fine shape of the shoe insole. Next, the secondary mold pressurized by the above-mentioned hot press was pressurized by the cold press at the temperature of 30 degrees C or less, and the shoe insole which is a finished product was shape | molded.

{Example 2}

After preparing a primary mold for roughly forming the shape of a shoe insole, EVA was added thereto and then heated at a temperature of 155 ° C. Thereafter, the EVA foam, which is approximately made from the primary mold, is taken out, and then put into an ordinary oven, heated at a temperature of 120 ° C., and then put into the secondary mold, and then cooled at a temperature of 30 ° C. or lower. The press was pressed to form a finished shoe insole.

In this case, the above-described secondary mold is manufactured to make a fine shape of the shoe insole.

On the other hand, in the above detailed description of the present invention has been described with respect to specific embodiments, various modifications are possible without departing from the scope of the invention.

That is, in the molding method described in Examples 1 and 2 described above, the primary foam is used as it is, or only the end face of the primary foam is removed after the surface is removed using a grinder or the like before being put into the secondary mold. Can be. Alternatively, after removing the skin layer on both sides of the primary foam, it may be secondary molded.

In addition, before the primary foam is injected into the secondary mold, the lining cloth may be adhered to the surface, and then secondary molding may be performed. At this time, in applying the primary foam in order to adhere the lining fabric, the coating method of the adhesive is a spray coating method, a roll coating method, a method using a brush, a method using a hot melt adhesive and the like. In particular, the hot melt adhesive may be in the form of sheets, powders, meshes or other hot melt adhesive applicators.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims.

As described above, the present invention has the advantage of simplifying the molding process and minimizing the number of workers by omitting the operation of turning on the large sponge in multiple sheets and the process of processing the insole rim surface.

In addition, the molding method of the present invention can reduce the manufacturing cost because the shoe insole is molded only by the foam molding method and the pressing process by heat / cooling press, which can reduce the cost of the product and reduce the industrial waste and economic burden on consumers. There is an elevated effect that can alleviate.

Claims (5)

In the method of molding a shoe insole using a foamed resin, The foamed resin was introduced into a primary mold at 140 to 180 ° C. to form a primary foam for insole having a rough shape, and then, the foamed resin was injected to a secondary mold at 130 to 180 ° C., and pressed by a hot press to insole of fine shape. After molding, it is again pressurized with a cold press at a temperature of about 30 ° C. or lower to form a shoe insole of the finished product or put into a secondary mold to be heated and cooled under pressure, but this process occurs in the same mold. Method of molding shoe insoles. In the method of molding a shoe insole using a foamed resin, The foamed resin was introduced into a primary mold at 140 to 180 ° C. to form a primary foam for insoles having a rough shape, which was then heated in an oven at 100 to 200 ° C., which was then added to a secondary mold to form a cold press. Molding method of shoe insole, characterized in that for molding a shoe insole of a fine shape by pressing. The method according to claim 1 or 2, wherein the foamed resin is an ethylene vinyl acetate copolymer or an ethylene alphaolefin copolymer or a bled material mainly containing them. The method according to claim 1 or 2, wherein the primary foam obtained from the primary mold is used as it is or the surface is removed using a grinder on only one side, and the mold is removed or the skin layer on both sides is removed, and then the secondary foam is put into the secondary mold. Molding method of shoe insole, characterized in that the molding. The method for forming a shoe insole according to claim 1 or 2, wherein the cloth for lining is bonded to the surface of the primary foam obtained from the primary mold.