KR20030051498A - Method for producing the sandal - Google Patents

Abstract

The present invention relates to a method of manufacturing sandals, and more specifically, to prevent the harmful working environment by combining the soles and insoles of the sandals without using an adhesive, the urethane constituting the outsole penetrates into the inside of the insoles by the foaming action The present invention relates to a method for manufacturing sandals by being combined so that they do not fall into water and the manufacturing process is shortened and the manufacturing cost of sandals is reduced.

In the sandal manufacturing method of the present invention, a method for manufacturing a sandal by combining the sole and the insole, the first step (S1) for preparing the insole fabric with an upper and inserting and fixing to the seating portion of the upper mold; A second step (S2) of injecting urethane liquid into the sole molding groove of the lower mold after fixing the insole fabric to the upper mold; A third step (S3) of respectively heating the insole fabric after fixing the upper mold and the lower mold into which the urethane solution is injected; Foaming a lower mold urethane solution to form a sole (S4); A fifth step (S5) of separating the upper mold and the lower mold and extracting the semi-finished product after foaming of the urethane liquid is completed; And a sixth step S6 of cutting out unnecessary portions of the insole fabric.

Description

Sandal manufacturing method {Method for producing the sandal}

The present invention relates to a method of manufacturing sandals, and more specifically, to prevent the harmful working environment by combining the soles and insoles of the sandals without using an adhesive, the urethane constituting the outsole penetrates into the inside of the insoles by the foaming action The present invention relates to a method for manufacturing sandals by being combined so that they do not fall into water and the manufacturing process is shortened and the manufacturing cost of sandals is reduced.

Shoes such as conventional sneakers or sandals are manufactured separately from the insole to which the upper (which has a different structure according to the type of shoes) is combined to cover the user's instep and the thick outsole to absorb shock compared to the insole, It is prepared by applying an adhesive such as a bond on the lower surface of the upper surface and the upper surface of the sole, and then intimately contacting the insole and the sole.

However, the conventional manufacturing method as described above has a disadvantage in that the manufacturing cost is high because the upper insole and the sole are separately manufactured.

In addition, since the adhesive used to combine the insole and the sole is in contact with water, the contact force is lowered, and thus, when frequently contacted with water, such as sandals, the adhesive force is lowered, resulting in the insole and the sole falling off.

In addition, adhesives, such as bonds used to bond insoles and soles, adversely affect worker's health when inhaled for a long time, and a lot of losses occur due to industrial accidents.

In addition, since the curing of the adhesive takes a lot of time, it takes a lot of time to manufacture.

The present invention has been made to solve the above problems, the object of the present invention is to prevent the harmful working environment by combining the soles and insoles of sandals without using an adhesive, and urethane constituting the soles by the foaming action By penetrating into the inside of the insole and coupled to the water does not fall into the water, the manufacturing process is shortened and to provide a sandal manufacturing method that reduces the manufacturing cost of sandals.

Sandals manufacturing method of the present invention for achieving the above object, in the method of manufacturing the sandals by combining the sole and the insole, the first to prepare the insole fabric with an upper and insert into the seating portion of the upper mold in advance Step S1; A second step (S2) of injecting urethane liquid into the sole molding groove of the lower mold after fixing the insole fabric to the upper mold; A third step (S3) of respectively heating the insole fabric after fixing the upper mold and the lower mold into which the urethane solution is injected; Forming a sole by foaming the lower mold urethane solution (S4); A fifth step (S5) of separating the upper mold and the lower mold and extracting the semi-finished product after foaming of the urethane liquid is completed; And a sixth step S6 of cutting out unnecessary portions of the insole fabric.

1 is a perspective view showing a bottom of a sandal manufactured according to the present invention,

2 is a perspective view of molds for manufacturing sandals according to the present invention;

Figure 3 is a side cross-sectional view of the combined state of the upper mold and the lower mold of Figure 2,

4 is a plan view showing a bottom of a sandal manufactured according to the present invention,

5 is a flowchart for explaining a sandal manufacturing method of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: sandals 12: insole

14: pinhole 16: sole

18: upper 20: upper mold

22: (insole fabric) seating portion 24: fixing pin

26: lower mold 28: sole molding groove

29: groove 30: pin housing groove

32: hinge coupling portion 34: cutting portion

Hereinafter, a method for manufacturing sandals of the present invention will be described in detail with reference to the accompanying drawings.

The sandals manufacturing method according to the present invention does not combine the insole and the outsole using the same adhesive as the conventional bond, but foams the urethane liquid constituting the outsole to produce the sole and at the same time the gap of the woven fiber of the insole (all) Alternatively, urethane penetrates deep into the micropores or intentionally formed fixing holes due to the foaming pressure.

By combining the outsole and the insole using urethane foam, the manufacturing time is shortened, and compared with the use of the adhesive, the insole and the outsole do not come off in contact with water.

1 is a perspective view of the sandals 10 manufactured in a semi-finished state by the method for manufacturing sandals of the present invention in an inverted manner so that the sole 16 is exposed upward. As shown, the sole 16 formed of urethane is provided and the insole fabric 12 is coupled to the upper surface of the sole 16.

In the periphery of the insole fabric 12, a plurality of pinholes 14 are formed which are used to fix the insole fabric 12 to an upper mold (not shown). In addition, an upper 18 (see FIG. 2) is attached to the upper surface (the opposite surface of the sole) of the insole fabric 12 to wrap the user's instep. It is apparent that the sole 16 is molded using urethane such as sandals or soles of sneakers that are commonly used and can be manufactured to have various shapes.

In order to manufacture sandals in the present invention, referring to Figure 2, to prepare the insole fabric 12 is attached upper 18 to the upper surface. The insole fabric 12 to which the upper 18 is attached is manufactured in the same manner as in the prior art. However, in the present invention, the insole fabric 12 is made larger than the area of the sole 16 and there is a difference that a plurality of pin holes 14 are formed along the periphery.

The insole fabric 12 prepared as described above is inserted and fixed to the upper mold 20 as a first step (S1). The upper mold 20 has a (insole fabric) seating portion 22 which is a groove having a shoe shape for accommodating the insole fabric 12 on a surface thereof, and the insole fabric 12 is formed inside the seating portion 22. A plurality of fixing pins 24 are formed to protrude from positions corresponding to the pin holes 14. The seating portion 22 has a sufficient size to accommodate the entire insole fabric 12.

When the insole fabric 12 is accommodated in the seating portion 22, the pin hole 14 formed around the insole fabric 12 is fitted to the fixing pin 24 of the upper mold 20 is coupled. At this time, the exposed surface A of the seating portion 22 and the upper surface B to which the upper 18 of the insole fabric 12 is attached are bonded to each other so that the upper 18 is not exposed to the outside. After that, it is protected from foaming of the urethane liquid.

The lower mold 26, which is combined with the upper mold 20 and used to form the sole 16 using the urethane liquid, injects urethane liquid onto the surface to form the sole 16 for forming the sole 16. ) And a plurality of pin receiving grooves 30 spaced apart from each other by a predetermined distance around the sole molding groove 28.

The sole forming groove 28 is to have the shape of the sole 16 is coupled to the lower portion of the insole fabric 12, referring to the drawings a plurality of diagonal directions in order to prevent slipping at the front and rear ends of the sole As a result, the groove 29 is formed and has a convex shape.

Of course, it is apparent that the form of the sole forming groove 28 can be changed to other forms. The sole molding groove 28 is injected with a thick urethane liquid, the urethane liquid is foamed by heating to form the sole 16.

The pin housing groove 30 is formed at a position corresponding to the plurality of fixing pins 24 installed in the upper mold 20, the upper mold and the lower mold 20, 26 are coupled to each other when in close contact, coupling.

3 is a side cross-sectional view showing a state in which the upper mold and the lower mold 20 and 26 are coupled and separated (dotted line). As shown, the upper mold and the lower mold 20, 26 is rotatably fixed by the hinge coupling portion (32).

When the upper mold and the lower mold (20, 26) is completely in contact with the fixing pins 24 are inserted into the pin housing groove 30, the insole fabric 12 is in close contact with the seating portion 22, it is fixed. Insole fabric 12 is made of a soft material such as woven paper, artificial leather or leather and is formed with gaps, micropores or holes for fixing. In addition, the upper 18 is also made of a soft material and because it is pressed when the upper mold and the lower mold (20, 26) is combined, it is not shown in the figure.

As described above, the insole fabric 12 to which the upper 18 is attached is inserted into the seating part 22 of the upper mold 20 and fixed by the fixing pin 24 (S1). The urethane solution is injected into the sole molding groove 28 of the lower mold 26 (S2). The urethane liquid is prepared in advance in a fluid thickened state. When the injection of the urethane liquid is completed, the upper mold and the lower mold 20, 26 as shown in Figure 3 is closed by rotating through the hinge coupling portion (32).

After the upper mold and the lower mold 20, 26 are closed in close contact as described above, as a third step, while being moved by a conveyor (not shown), it is heated by heating means such as a heater installed at the lower side of the conveyor (S3). ). At this time, the heating temperature and the heating time are preferably at a temperature at which foaming of the urethane liquid can be performed most quickly.

As described above, the urethane liquid injected into the sole forming groove 28 of the lower mold 26 is foamed to form the sole 16 as it is heated by using a heating means such as a heater (S4). At this time, the urethane foamed to reach the lower surface of the insole fabric 12, and in particular penetrates and attaches through a gap (ol), micropores or intentionally formed fixing holes formed on the bottom surface of the insole fabric (12).

As described above, the urethane solution penetrates into the gap (ol) formed in the bottom surface of the insole fabric 12, the micropores or the fixing holes, and hardens the sole 16 and the insole fabric 12 to be firmly coupled. .

The fixing holes that can be formed in the bottom of the insole fabric 12 can be formed in the fabric itself to form holes (not all of them, but to penetrate only part of the surface) or to form holes in the form of patches. Can be.

It is also apparent that the fixing holes can also be deformed into a shape in order to easily penetrate the urethane and to secure the bonding force when it is hardened. These fastening holes can be applied to any insole fabric, such as textile paper, artificial leather or leather.

Unlike the adhesives used in the prior art, such urethane-based bonding fundamentally blocks the permeability of water, thereby solving the problem of separation of the insole fabric 12 and the sole 16 even when the water is stained.

After the formation of the sole 16 is completed by the foaming of the urethane liquid as described above, as the fifth step, the upper mold and the lower mold 20 and 26 are separated, respectively, and semi-finished products are extracted (S5). Is the same state as in FIG. 1 or 4. 4 shows the bottom of the sandal 10, the insole fabric 12 is exposed to the outside around the sole 16, this portion is a cut portion (34).

As a sixth step in the above state, the unnecessary portion of the insole fabric 12 is cut (S6) to complete the sandal 10 product.

Sandals manufactured by the sandal manufacturing method of the present invention, the sole formed by the urethane foam, has a structure in which a portion of the urethane constituting the outsole penetrates into the inside of the insole and hardens to combine the sole and the insole, Such a structure can be prepared not only in the manufacturing method of the present invention but also in other ways, and the structure of the sandals that combines the outsole and the insole using the foaming of the urethane can also be said to belong to the scope of the present invention.

In addition, although the sandals have been exemplified in the above description, it is apparent that the manufacturing method of the present invention can be applied not only to sandals but also to sneakers.

According to the present invention as described above, by combining the soles and insoles of the sandals without using an adhesive to prevent harmful working environment, the soles consisting of urethane foam is injected into the back of the insoles by the urethane is injected and combined with water does not fall into the manufacturing process This shortens the cost of manufacturing sandals.

Claims (1)

In the method of manufacturing sandals by combining soles and insoles, A first step (S1) of manufacturing an insole fabric having an upper attached thereto and having pin holes formed thereinto, and inserting and fixing the insole to the seat of the upper mold; A second step (S2) of injecting urethane liquid into the sole molding groove of the lower mold after fixing the insole fabric to the upper mold; A third step (S3) of respectively heating the insole fabric after fixing the upper mold and the lower mold into which the urethane solution is injected; Forming a sole by foaming the lower mold urethane solution (S4); A fifth step (S5) of separating the upper mold and the lower mold and extracting the semi-finished product after foaming of the urethane liquid is completed; And Sandals manufacturing method comprising a sixth step (S6) for cutting the unnecessary portion of the insole fabric.