KR101779378B1 - Manufacturing method for shoes insole - Google Patents

Abstract

The present invention relates to an insole which is used in various types of shoes. More specifically, the present invention relates to a method of manufacturing a footwear insole having leather and silicone polymerized therein, which molds and manufactures the footwear insole using a silicone material with high elasticity by performing molding of a silicone mixture on the back of the insole in a state that a preprocessed leather is inserted into a forming mold of the insole, and forming the leather to create an excellent bonding state with the silicone material through a preceding operation. The method of the present invention comprises: a scratch process of being in contact with a steel brush of a rotational state with the back of leather to form a rough surface on the back of the leather; a needle punching process of forming micropores in the entire surface of the leather; a press process of cutting the leather according to a shape of the insole; a seating process of enabling the cut leather to be inserted into a lower mold; a silicone injection process of combining an upper mold and the lower mold, and injecting the silicone mixture between the upper and lower molds; an ejection process of separating a cured silicone mixture adhering to the leather from the upper and lower molds; an aging process of maintaining each of a high temperature aging and a lower temperature aging for 2 to 3 hours; and a side end finishing process of coating a silicone coating solution on side end portions of an aged molded article. The method enables the footwear insole to maintain a stable closely inserted state without flow within the shoes due to excellent elasticity and adhesiveness of silicone, allows the footwear insole to have very excellent effects of distributing weight of a user and absorbing shock of the user due to physical properties of the silicone itself, enables the footwear insole to create smooth wearing sense as well as luxurious aesthetics of the leather, prevents lifting or separation of the leather by the excellent bonding state between a silicone substrate and the leather, and can mass-produce a finished product at a high speed through the forming mold, thereby obtaining an effect of contributing to quality stabilization as well as production cost reduction.

Description

{Manufacturing method for shoes insole}

The present invention relates to an insole for use in various types of shoes, and more particularly, to a method of manufacturing a silicone elastomer, which comprises forming a synthetic or natural leather on the entire surface thereof and forming a highly elastic silicone mixture on the lower side of the leather, The present invention also relates to a method for manufacturing a footwear insole which minimizes the harmful effect on the human body by removing the conventional adhesive production method.

In general, various kinds of shoes such as shoes, shoe, shoe and shoe are composed of outsole, midsole, insole and upper. The outsole is in direct contact with the ground to increase the gripping force, The midsole is positioned at the upper part of the outsole to provide a cushion feeling on the sole of the foot, or to absorb the dispersion of body weight and the load, and the insole also has a cushioning effect A function of absorbing a load, and a surface finishing material inside the shoe, and the upper is made of a leather, a fiber, a synthetic resin, or the like to enclose the user's foot.

At this time, the insole disperses the weight of the user and provides a good feeling of cushioning, thereby minimizing the fatigue of the foot, and at the same time, functions as an inner finishing material of the shoe. Generally, the insole is made of a foamed resin such as polyurethane And the surface is finished by attaching leather or an island retainer to the surface.

In the case of a conventional insole for footwear, in the case of Patent No. 10-0919137, a footwear insulator made of a polyurethane gel material is manufactured by applying a polyurethane material. However, the hardness of the insole varies depending on the foot portion, The impact absorbing effect can be suppressed without increasing the impact resistance.

In addition, in the case of Patent No. 10-1333728, a footwear insole is manufactured using a silicone material, and a hexagonal line protrusion having a honeycomb structure is formed on the bottom surface of the insole, thereby improving impact absorption, Have been enrolled and registered.

In addition, in the case of Patent No. 10-1391357, a functional insole including a bottom plate, a heel reinforcement member, a side arch reinforcing member, a front support pad, a heel pad, a center support pad and an upper cover is proposed, In the case of the registered patent No. 10-1638305, in the case of an insulated protective part and an anionic ceramic ball, a polyurethane foam layer, a latex foam layer, a second graphite foam layer, It provides high elasticity and high quality cushioning feeling by providing the insole layered with the wood impregnated sheet layer and the graphene layer as well as preventing the contamination of the insole with moisture and exhibiting excellent thermal conductivity and preventing surface damage and corrosion And shoes with high-elasticity insole that can realize light weight of shoes at the same time will be.

However, the existing footwear insoles have a method of producing a leather or an island retainer by adhering and fixing to the surface of the polyurethane base material, thereby causing problems such as the above leather or fiber paper being detached from the polyurethane base material, The adhesive is directly exposed to the human body, and thus it has an element harmful to the human body.

Also, depending on the skill of the operator, the polyurethane substrate and the surface finishing material are not properly adhered to each other, resulting in defective products, and the quality stability is also lowered, which is extremely inefficient due to the inability to produce high quality insole in large quantities.

Particularly, when the insole itself is molded by using silicon, excellent elasticity of the silicone material can be provided. However, there is a problem that the surface is easily contaminated due to the viscosity of the silicone, This is a very short term.

Korean Registered Patent No. 10-0919137 (registered on September 21, 2009) Korean Registered Patent No. 10-1333728 (Registered on November 21, 2013) Korean Registered Patent No. 10-1391357 (Registered on Apr. 25, 2014) Korean Registered Patent No. 10-1638305 (Registered on July 26, 2014)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems described above, and it is an object of the present invention to provide a method of forming and manufacturing an insole for a shoe using a highly elastic silicone material, And the leather is formed so as to form an excellent bonding state with the silicon material through the preceding work,

In addition to the superior elasticity and weight dispersing effect of silicone, it also shows a luxurious aesthetic feeling and soft fit feeling of the leather on the surface, and the excellent bonding property between the silicone base and the leather due to the mutual polymerization molding method The present invention provides a method of manufacturing an insole for shoes, which is produced by polymerizing leather and silicone so that mass production can be achieved in a high-quality state.

According to an aspect of the present invention, A needle punching step of forming micro voids on the entire surface of the leather; A pressing step of press-molding the leather so as to have a shape and a thickness of the insole; An inserting step of inserting the protruding portion of the leather into the lower mold; Between the lower mold and the upper mold and between the lower mold and the upper mold, a silicone injection process is performed in which 95 to 98 weight of thermosetting liquid silicone, 1 to 2 weight% of silver nano powder and 1 to 3 weight% of charcoal powder are injected, ; A take-out step of separating the injected silicone mixture from the upper and lower molds in a state in which the silicone mixture is adhered to the leather and cured; An aging step of maintaining a temperature of aging at a high temperature for preserving the molded article in a chamber having an internal temperature of 80 DEG C and a low temperature aging for preservation in a chamber having an internal temperature of 40 DEG C for 2 to 3 hours; And a cutting step of cutting the leather along the outer periphery of the silicon molding part from the aged molded product.

The present invention is capable of maintaining a stable tightly inserted state without flowing in a shoe due to excellent elasticity of silicone as well as adhesiveness, and is excellent in weight dispersion and impact reduction effect of a user due to the physical properties of silicon itself. And it is possible to prevent the leather from being lifted or dropped due to the excellent bonding state between the silicone base material and the leather, and the finished product can be produced at a high speed through a molding die at a high speed It is possible to contribute to stabilization of quality as well as reduction of production cost.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall perspective view of a footwear insole according to the present invention;
Fig. 2 is an enlarged view of the leather of a footwear insole according to the present invention.
Fig. 3 is a view showing a leather press process of a footwear insoles according to the present invention
Fig. 4 is a view showing a molding process of a footwear insole according to the present invention
Fig. 5 is a view showing a process of taking out the insole for shoes according to the present invention
Fig. 6 is a view showing a cutting process step of the insole for shoes according to the present invention

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor may properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall perspective view of a footwear insoles according to the present invention.

As shown in the drawing, the insole for shoes according to the present invention is characterized in that an upper portion and a side portion of a silicone mixture 20 in a molded state are covered with a synthetic or natural leather 10 so that the silicone mixture 20 and the leather 10 The leather 10 and the silicon mixture 20 are directly bonded and molded to the back surface of the leather 10 without being subjected to a separate bonding step State.

As a process for manufacturing such a footwear insoles, a scratch process is firstly performed on the back surface, i.e., the bottom surface, of the leather 10 in the state of having a synthetic or natural leather 10. [

At this time, in the above-described scratching step, the entire leather is immersed in vegetable tannic acid for 30 minutes or more to perform a softening work, and then a steel ball having a diameter of 0.5 to 1.0 mm is sprayed at a high pressure on the back surface of the leather (10) A steel brush is rotated and brought into contact with the back surface of the leather 10 in a state where the surface of the back surface is being densely pressed by a user to form a scratch portion 11 having a rough surface in the form of a lint on the back surface as shown in FIG. .

Here, the densifying operation by the steel ball is to prevent the back surface of the leather 10 from being excessively damaged or detached by the steel brush, and the scratch portion 11 has a binding force with the silicon mixture 20 And the like.

In addition, tannic acid is widely known in plants and is a colorless and amorphous material, which is known to dissolve in water. It penetrates into leather and forms a chemical bond with protein to make durability. Leather processed by such tinic acid is light brown It is an ideal method for improving the softness and durability of natural leather because it is rich in absorbent plasticity, easy to shape and dyeable.

After the scratching process is completed, the leather 10 is subjected to a needle punching process in which a number of pores are formed along the entire surface or the edge. The leather punched through the needle punching process 10 can freely communicate air, while silicone particles do not flow, thereby enhancing the adhesion between the leather 10 and the silicon mixture 20, thereby improving the bonding performance between the leather 10 and the silicon mixture 20, The leather (10) communicates with the air through the innumerable pores, thereby contributing to suppression of bacterial growth and the like.

3, the leather 10 is put into the press die 30, and a depression 12 having a desired thickness and shape is formed through the press die 30 As the leather 10 is heated and pressed to the extent that the leather 10 is not cut through the press die 30, the leather 10 in a flat state will be formed with a depression 12 having a desired size and depth, The press mold 30 in a heated state is gradually cooled so that the shape of the depressed portion 12 remains unchanged and the press mold 30 So that the leather 10 is separated and taken out.

4, the leather 10 having the depressed portion 12 is subjected to an embossing process for inserting and embedding the embossed mold 40 into the mold 40, 20 is injected.

That is, the molding die 40 deployed in the upper mold and the lower mold has the leather 10 placed so that the depressed portion 12 is opened on the lower mold, and then the lower mold and the upper mold are combined with each other When the silicone mixture 20 is injected through the upper mold, the silicon mixture 20 is filled with the high pressure between the depressions 12 of the leather 10, The silicon mixture 20 is hardened due to the heating of the molding die in such a state and is firmly bonded to the leather 10 while being cured .

The air filled in the depressed portion 12 of the leather 10 during the injection of the silicone mixture 20 escapes through the innumerable pores formed in the leather 10 between the upper mold and the lower mold The silicone mixture 20 can be densely packed in the depressed portion 12 of the leather 10.

At this time, the silicon mixture 20 is composed of 95 to 98% by weight of thermosetting liquid silicone, 1 to 2% by weight of silver nano powder and 1 to 3% by weight of char powder, and the thermosetting liquid silicone is harmless to human body. It is known that the silver nano powder performs a sterilizing action and the charcoal powder is known to have an excellent effect on the removal of bad odor. Therefore, the shoes insole of the present invention, which is made of the silicone mixture 20, Effect.

5, the upper mold and the lower mold are separated from each other, and the bonded molding of the leather 10 and the silicon mixture 20 is removed from the upper mold and the lower mold, , And the taken-out molding is subjected to a separate aging step.

That is, the leather 10 and the silicon mixture 20 are bonded to each other in the process of curing the silicone mixture 20 to have high elasticity in the molding die 40. The silicone mixture 20 is aged The molecular arrangement is stabilized through the process, and the leather 10 and the silicon mixture 20 are prevented from being separated from each other due to external impact or load.

Here, in the aging step, a primary aging process is performed in which the raw material is stored for 2 to 3 hours in a chamber set at an internal temperature of 80 ° C, which is a somewhat lower temperature than that immediately taken out from the forming die. And a second aging process is carried out for a further 2 to 3 hours in the presence of an inert gas such as nitrogen, so that the insole taken out from the mold at a high temperature of 100 to 200 DEG C for silicon molding is exposed to normal temperature, And the silicon mixture 20 undergoes a process of gradually stabilizing the silicon mixture 20 by aging the silicon mixture 20 in a state similar to the actual use temperature through the gradual lowering of the temperature.

Accordingly, the molded product, which has undergone the aging process, is removed from the chamber and a cutting process is performed to cut and remove the remaining rims except for the leather 10 wrapping the molded silicone mixture, The footwear insole is bonded to the entire upper surface of the mixture 20 in a state of being in close contact with the side surface.

Since the leather 10 and the silicon mixture 20 are completely bonded to each other through the molding die without a separate bonding step, the production speed is remarkably improved and the quality stability is excellent. , It is possible to mass-produce high-speed insole for shoes having various sizes, various thicknesses or various shapes according to the processing form of the molding die 40.

Also, since the silicon mixture 20 is exposed directly to the bottom of the insole, the shoes for insole made in this way are excellent in the ability to contact the outsole of the shoe due to the adhesiveness of the silicone material, thereby preventing the insole from flowing or slipping in the shoe And the fit to the shoe can be further improved.

Next, another embodiment of the footwear insole produced by the sequential process as described above will be described. First, in the same manner as the scratching process and the needle punching process for the leather 10, Is pressed through a press die (30) to cut the same as the size and shape of the insole, instead of forming the depression (12), thereby cutting and producing the leather (10) having the shape of the insole.

Then, the leather is injected into the molding die, which is in a mutually mating state, in a state where the leather is put in the lower mold of the molding die 40, A silicon implant process is performed to allow the silicon mixture 20 to be hardened and molded.

Since the leather 10 and the silicon mixture 20 in such a state are exposed in the overlapped state as they are, the side end portions of the leather 10 and the silicon mixture 20 in this state are exposed as they are, A side end finishing step of applying a silicone coating liquid along the entire length of the insole can be completed.

The footwear insoles according to the above manufacturing method are applied in the same manner in which the silicon mixture 20 is directly contacted with the scratch portion 11 of the leather 10 to be bonded in the molding process of the silicone mixture 20. [

In addition, since the boundary between the leather 10 and the silicone mixture 20 is closed by the silicone coating solution due to the side end finishing process, it is possible to prevent the silicone 10 from spreading or separating from each other. In addition, moisture, So that the service life can be further extended.

Therefore, the insole for footwear of the present invention is capable of mass-producing the insole in a state in which the leather (10) is wrapped around the molded part made of the silicon mixture without a separate bonding process, and the insole Provides more excellent elasticity and shock absorbency, so that the functionality of the shoe is improved and the fatigue of the foot is lowered so that the wearing of the shoe in a very pleasant condition is continuously performed.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention as defined by the appended claims. Examples should be understood.

10: leather 11: scratch portion
12:
20: Silicone mixture
30: Press mold
40: Molding mold

Claims (4)

delete After the softening step is performed on the leather with vegetable tannic acid, a steel ball having a diameter of 0.5 to 1.0 mm is sprayed on the back surface of the leather at high pressure to densify the surface, and a rotating steel brush is brought into contact with the back surface, A scratching step of causing a scratch to be generated;
A needle punching step of forming microvoids such that air is communicated to the entire surface of the leather and the silicone particles are not communicated;
A pressing step of cutting the leather along the shape of the insole;
An anchoring step of causing the cut leather to be inserted into a lower mold;
Between the lower mold and the upper mold, and between the lower mold and the upper mold, a silicone mixture of 95 to 98 wt% of thermosetting liquid silicone, 1 to 2 wt% of silver nano powder and 1 to 3 wt% of charcoal powder is injected A process;
A take-out step of separating the injected silicone mixture from the upper and lower molds in a state in which the silicone mixture is adhered to the leather and cured;
An aging step of maintaining a temperature of aging at a high temperature for preserving the molded article in a chamber having an internal temperature of 80 DEG C and a low temperature aging for preservation in a chamber having an internal temperature of 40 DEG C for 2 to 3 hours;
And a side end finishing step of applying a silicone coating liquid from the aged molded article along the side edges of the leather and the silicone forming part, and then performing a side finishing step in this order. delete delete

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