KR101087047B1 - Insole in footwear and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A shoe insole and a manufacturing method thereof are provided to improve productivity of products and to embody various shapes of designs. CONSTITUTION: A shoe insole comprises: a first bottom member(10) and a second bottom member(20) which come in contact with the front and rear of the bottom of shoe; a connection part(15) in which an end part of the first bottom member and an end part of the second bottom member are jointed by high-frequency welding; and a polyurethane layer(30) which is integrally formed in the bottom of the first bottom member and second bottom member.

Description

Shoe insole and its manufacturing method {INSOLE IN FOOTWEAR AND MANUFACTURING METHOD THEREOF}

The present invention relates to a shoe insole and a method of manufacturing the same, and more particularly, by connecting the connection parts of the first bottom member and the second bottom member separated by high frequency fusion, simplifying the manufacturing process and reducing the incidence of product defects. The present invention relates to a shoe insole and a method of manufacturing the same, which can improve various productivity and implement various types of designs according to the tastes of consumers at low cost.

In general, the sole part of the shoe is in contact with the ground, and the rubber is mixed with the chemical in consideration of abrasion due to friction with the ground, and the sole is molded to be relatively hard, and the upper surface absorbs and absorbs the shock from the ground. Includes a shoe insole made of soft material to reduce fatigue while walking or driving.

Conventional general shoe insole is composed of a non-woven fabric or artificial fiber excellent in sweat absorption and breathability on the upper surface directly in contact with the bottom surface of the foot, or natural or artificial leather excellent in wear resistance and water resistance, solidified ethylene vinyl acetate on the bottom It was produced by adhering (EVA) resin or by injection of polyurethane (PU) resin.

In this case, conventionally, any one of the above-described materials is used for the entire upper surface of the shoe insole, or the front and heel portions of the sole are made of different materials, and the connecting portions are sewn or bonded by adhesive, and the EVA It was common to form and manufacture resin or polyurethane resin.

However, when the joint is sewn or bonded by applying an adhesive, the process is cumbersome and takes a lot of time to reduce the productivity of the product, and the surface of the connection is not smooth, and there is a problem that the fit is reduced.

In addition, since the EVA resin is used by cutting a flat sponge, the process has a simple advantage, but there is a limitation in implementing a variety of delicate designs because the cushioning is less than the polyurethane resin and the hardness is low, and it is designed to meet various tastes of consumers. In the situation that needs to be diversified, it was difficult to respond quickly to changes in design.

The present invention has been made to solve the above problems, to simplify the manufacturing process of the shoe insole and reduce the product incidence rate of the product to improve the productivity of the product and to meet the tastes of consumers in a variety of designs at low cost It is an object of the present invention to provide a shoe insole and a method of manufacturing the same.

The shoe insole of the present invention for achieving the above object, the first bottom member 10 and the second bottom member 20 formed of separate members in contact with each of the heel and heel portion of the bottom surface of the foot; A connection part 15 in which an end portion 10-1 of the first bottom member 10 and an end portion 20-1 of the second bottom member 20 are vertically stacked with a predetermined width and joined by high frequency fusion; And a polyurethane layer 30 integrally formed on the bottoms of the first bottom member 10 and the second bottom member 20 joined by the high frequency fusion.

In this case, a hot melt 40 is interposed between the first bottom member 10 and the second bottom member 20 of the connecting portion 15, and the first bottom member 10 is interposed with the hot melt 40. ) And the second bottom member 20 may be bonded.

In addition, the first bottom member 10 may be made of a moisture absorbing and breathable material, the bottom surface of the first bottom member 10 may be composed of a polyurethane sheet layer 11 is coated.

In addition, the second bottom member 20 may be made of a wear-resistant and waterproof material.

Method for producing a shoe insole of the present invention, the step of preparing a first bottom member 10 and the second bottom member 20 formed of separate members in contact with the heel and heel portion of the bottom surface of the foot; The connecting portion 15, which is formed by vertically stacking the end portion 10-1 of the first bottom member 10 and the end portion 20-1 of the second bottom member 20 to a predetermined width and joined by high frequency fusion, Forming; Opening the mold 50 and injecting a polyurethane solution 30a into the lower mold 50b; Mounting the first bottom member 10 and the second bottom member 20 joined by the high frequency fusion on the lower mold 50b into which the polyurethane solution 30a is injected; Covering the upper mold 50a on the lower mold 50b and drying the polyurethane solution 30a for a predetermined time to form a polyurethane layer on the bottom of the first bottom member 10 and the second bottom member 20. Integrally injection molding 30; And drawing out the injection molded product from the mold 50 and cutting the edges of the first bottom member 10, the second bottom member 20, and the polyurethane layer 30 to complete the shoe insole 1. It includes; step.

In this case, the forming of the connecting portion 15 joined by the high frequency fusion may include interposing a hot melt 40 between the first bottom member 10 and the second bottom member 20 of the connecting portion 15. It can be configured to apply a high frequency in the state.

According to the present invention, when the connecting portions of the first bottom member and the second bottom member formed by different members are joined by high frequency fusion, the wearability of the surface of the connecting portion is improved and when the conventional connecting portion is joined by sewing or adhesive. In comparison, the manufacturing process can be simplified, and the productivity of the product can be improved by reducing the incidence of product defects.

In addition, according to the present invention, since it is possible to form a variety of forms and patterns of the connection portion using a fusion mold easily detachable to a high-frequency machine, it is possible to quickly produce and supply a shoe insole expressing a variety of designs according to the taste of the consumer It works.

1 is a perspective view of a shoe insole according to the present invention,
2 is an exploded perspective view of the insole according to the invention,
3 is a cross-sectional view taken along line AA of FIG.
Figure 4 is a perspective view showing embodiments in which the connection portion of the shoe insole according to the invention represented in various designs,
5 is a flow chart of a method of manufacturing a shoe insole according to the present invention,
6A to 6G are explanatory views of a method of manufacturing a shoe insole according to the present invention.

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a shoe insole according to the present invention, Figure 2 is an exploded perspective view of the insole according to the invention, Figure 3 is a cross-sectional view of the AA of Figure 1, Figure 4 is expressed in various designs of the connection portion of the shoe insole according to the present invention Is a perspective view showing the embodiments.

Shoe insole 1 according to an embodiment of the present invention, the first bottom member 10 and the second bottom member 20 formed of a separate member in contact with each of the heel and heel portion of the bottom of the foot, End portion 10-1 of first bottom member 10 and end portion 20-1 of second bottom member 20 are stacked up and down in a predetermined width and joined to each other by high frequency fusion and the high frequency fusion. It is configured to include a polyurethane layer 30 formed integrally on the bottom surface of the first bottom member 10 and the second bottom member 20 bonded to the.

The first bottom member 10 is preferably made of a material having excellent moisture (sweat) absorption and breathability. For example, the first bottom member 10 is made of a water-repellent material that can be quickly dried when sweat is high on the foot. For example, it may be made of a woven fabric, a nonwoven fabric, a pile fabric, a needle felt, or the like.

In addition, the bottom surface of the first bottom member 10 is configured to prevent the penetration of the polyurethane solution (30a) during the injection molding of the polyurethane layer 30 to be described later, the polyurethane sheet layer 11 is coated It may consist of.

The second bottom member 20 is preferably made of a waterproof material having a wear resistance so as to prevent wear due to the load of the human body, for example, may be composed of leather, such as natural or artificial leather.

In addition, the first bottom member 10 and the second bottom member 20 may be made of polyvinyl chloride (PVC) in which different colors and designs are expressed.

Bonding between the first bottom member 10 and the second bottom member 20 is made by high frequency fusion. Here, the high frequency fusion refers to a method of converting electrical energy into mechanical vibration energy and transferring strong vibration energy to the joined material instantaneously to generate frictional heat due to vibration to dissolve and join the joint surfaces.

In the case of high frequency welding, when the first bottom member 10 and the second bottom member 20 are made of a material that can be dissolved by high frequency, for example, PVC, between the first bottom member 10 and the second bottom member 20. Although it is not necessary to add a separate crosslinking material to the first bottom member 10 and the second bottom member 20 when the material is composed of a material that is not dissolved by high frequency, the first bottom member 10 and the second High frequency fusion is performed between the bottom members 20 via a crosslinking material.

In this embodiment, hot melt (40) is used as the crosslinking material. The hot melt is an adhesive that melts only 100% solids into heat to form a liquid without dissolving or dispersing it in a solvent as a solid substance at room temperature. The hot melt is applied to the adhered surface in a molten state and then radiates heat to the adhered surface and the surroundings. Cooling and solidification, because it does not require a drying process compared to other solvent-type adhesives or water-dispersible adhesives, it has a fast adhesion speed.

As described above, in the present invention, the end 10-1 of the first bottom member 10 and the end 20-1 of the second bottom member 20 are vertically stacked in a predetermined width, and a simple method of applying a high frequency in the high frequency fusion machine. Since the connection of the connection part 15 is made through the process, the process may be simplified more than the conventional method of joining by sewing or applying and curing an adhesive for bonding the connection part 15, and shorten the process time. Of course, it is possible to significantly reduce the defective rate of the product, it is possible to smoothly process the surface of the connecting portion 15 it is possible to improve the fit of the bottom of the foot.

In addition, during high frequency welding, the connection portion 15 of the first bottom member 10 and the second bottom member 20 is applied with a predetermined pressure together with vibration energy by a fusion mold (not shown) detachably attached to the high frequency machine. Joining is made in accordance with the shape of the connecting portion 15, such a fusion mold is relatively inexpensive (低價), and the production period also takes a short time, it is possible to easily manufacture and replace in various forms.

Therefore, as shown in (a) to (c) of FIG. 4, a fusion mold manufactured in a form corresponding to various types of connection parts 15-1, 15-2, and 15-3 is attached to a high frequency machine so that high frequency fusion is performed. By doing this it is possible to easily diversify the design of the connecting portion (15-1, 15-2, 15-3) of the shoe insole (1a, 1b, 1c).

The polyurethane layer 30 is integrally formed by injection molding on the bottom of the first bottom member 10 and the second bottom member 20 joined by high frequency fusion. The polyurethane layer 30 has a good cushioning feeling, and is formed by injecting a liquid polyurethane solution into a mold and drying the mold, so that various designs can be implemented.

2 illustrates an example in which a plurality of acupressure protrusions 31 and a recess 32 are formed on the upper surface of the polyurethane layer 30, and the streamlined design is implemented, but is not limited thereto. By changing the inside of the injection mold (50; 50a, 50b, see Figure 6b) to a variety of shapes it is possible to implement a variety of designs.

5 is a flow chart of a manufacturing method of a shoe insole according to the present invention, Figures 6a to 6g is an explanatory view of a manufacturing method of a shoe insole according to the present invention.

Method of manufacturing a shoe insole according to the present invention, the step of preparing a first bottom member 10a and a second bottom member 20a formed of separate members respectively contacting the front heel portion and the heel portion of the foot surface (S 10) a connecting portion (10) of the first bottom member (10a) and the end portion (20-1) of the second bottom member (20a) are vertically laminated with a predetermined width and joined by high frequency fusion ( 15a) forming a step (S 20, Fig. 6a), opening the mold 50 and injecting a polyurethane solution 30a into the lower mold (50b) (S 30, 6b and 6c), the poly Step of mounting the first bottom member (10a) and the second bottom member (20a) bonded by the high frequency welding on the lower mold (50b) in which the urethane solution (30a) is injected (S 40, Fig. 6d), Covering the upper mold 50a on the lower mold 50b and drying the polyurethane solution 30a at a predetermined time and temperature (about 15 minutes at 35 to 40 ° C.) to allow the first bottom member 10a and the second to be dried. Bottom Injection molding the polyurethane layer 30 integrally on the bottom surface of the ash (20a) (S 50, Fig. 6e) and withdraw the injection molding from the mold 50, the first bottom member 10 and the second It comprises a step (S 60, Fig. 6f and 6g) to complete the shoe insole 1 by cutting the edge of the bottom member 20 and the polyurethane layer 30.

In this case, the forming of the connecting portion 15a joined by the high frequency fusion (S 20) is performed when the first bottom member 10a and the second bottom member 20a are made of a material which is not dissolved by high frequency. It may be configured to apply a high frequency in the state between the hot melt 40 between the first bottom member (10a) and the second bottom member (20a) of the connecting portion 15.

According to the manufacturing method of the shoe insole according to the present invention as described above, the bonding between the first bottom member 10 and the second bottom member 20 can be made quickly, accurately and easily by high frequency fusion, the first bottom Shoe insole 1 because it is possible to implement a variety of designs on the surface of the connection member (15,15-1,15-2,15-3) and the polyurethane layer 30 of the member 10 and the second bottom member 20 While simplifying the manufacturing process there is an advantage that can quickly produce and supply the shoe insole (1) according to the consumer's preference to the use of shoes such as sneakers or shoes.

1,1a, 1b, 1c: shoe insole 10,10a: first bottom member
10-1: end 11 of first floor member 11: polyurethane sheet layer
15,15a, 15-1,15-2,15-3: connecting portion 20,20a: second bottom member
20-1: end portion of second bottom member 30: polyurethane layer
30a: polyurethane solution 31: acupressure protrusions
32: groove 40: hot melt
50: mold 50a: upper mold
50b: Lower mold

Claims (6)

A first bottom member 10 and a second bottom member 20 formed as separate members that respectively contact the front heel and heel portions of the bottom of the foot;
A connection part 15 in which an end portion 10-1 of the first bottom member 10 and an end portion 20-1 of the second bottom member 20 are vertically stacked with a predetermined width and joined by high frequency fusion; And
And a polyurethane layer 30 integrally formed on the bottom surfaces of the first bottom member 10 and the second bottom member 20 joined by the high frequency fusion.
The first bottom member 10 is made of a moisture absorbing and breathable material, the bottom of the first bottom member 10, the shoe insole characterized in that the polyurethane sheet layer (11) is coated. The method of claim 1,
A hot melt 40 is interposed between the first bottom member 10 and the second bottom member 20 of the connection part 15, and the first bottom member 10 is connected to the first melt member 40 via the hot melt 40. Shoe insole, characterized in that the second bottom member 20 is bonded. delete The method of claim 1,
The second bottom member 20 is a shoe insole, characterized in that made of a wear-resistant and waterproof material. Preparing a first bottom member 10 and a second bottom member 20 formed of separate members respectively contacting the front heel portion and the heel portion of the bottom of the foot;
The connecting portion 15, which is formed by vertically stacking the end portion 10-1 of the first bottom member 10 and the end portion 20-1 of the second bottom member 20 to a predetermined width and joined by high frequency fusion, Forming;
Opening the mold 50 and injecting a polyurethane solution 30a into the lower mold 50b;
Mounting the first bottom member 10 and the second bottom member 20 joined by the high frequency fusion on the lower mold 50b into which the polyurethane solution 30a is injected;
Covering the upper mold 50a on the lower mold 50b and drying the polyurethane solution 30a for a predetermined time to form a polyurethane layer on the bottom of the first bottom member 10 and the second bottom member 20. Integrally injection molding 30; And
Drawing out the injection molding from the mold (50), cutting the edges of the first bottom member (10), the second bottom member (20) and the polyurethane layer (30) to complete the shoe insole (1); Method of manufacturing a shoe insole comprising a. The method of claim 5,
The forming of the connecting portion 15 joined by the high frequency fusion may be performed in a state where a hot melt 40 is interposed between the first bottom member 10 and the second bottom member 20 of the connecting portion 15. A method of manufacturing a shoe insole, characterized by applying a high frequency.

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