KR100560372B1 - Manufacturing method and shoe sole with functional insert - Google Patents

Abstract

The present invention relates to a shoe sole including a functional insert and a method for manufacturing the same, wherein the insert that enters the arch portion of the base is directly inserted into the cavity of the mold by a method of simultaneously inserting the insert when manufacturing the insert sole shoe By doing so, it is possible to reduce the number of separate attachments as before, thereby improving workability and productivity related to the production of shoe soles, and at the same positions as the main grounding portions of the shoes when manufacturing shoe soles. After placing the functional insert of the product, it is directly injection molded together with the base so that the shoe sole can serve as the sole of the shoe. Thus removing the sole of the shoe from the three large components that make up the shoe. Because, as viewed from the overall claim right side of the shoe can reduce the original Ghana weight effectively, the process is the addition to provide a shoe sole which production method producing a shoe sole comprising a functional insert which can be dramatically reduced and thus.

Shoe Brush, Mold, Injection, Insert, Functional

Description

Shoe sole with functional inserts and manufacturing method thereof {Manufacturing method and shoe sole with functional insert}             

1 is a schematic view showing a manufacturing method of a shoe brush including a conventional functional insert

Figure 2 is a schematic process diagram showing a method of manufacturing a shoe brush comprising a functional insert according to the present invention

Figure 3 is a schematic process diagram showing another embodiment of manufacturing a shoe sole by applying a method of manufacturing a shoe brush comprising a functional insert according to the present invention

<Explanation of symbols for main parts of drawing>

10: upper mold 20: lower mold

30: cavity 40a, 40b, 40c: base

50a, 50b, 50c: insert 60: groove

70: liner 80a, 80b: border layer

The present invention relates to a shoe sole including a functional insert and a manufacturing method thereof, and more particularly, to a shoe sole including a functional insert using a functional insert having a border of the same color and material as that of the base color and material. By inserting the functional insert directly into the mold and providing a manufacturing method for integrally injection molding the functional insert together with the base, the functionality enables high efficiency in terms of productivity and workability in the production of shoe soles. Shoe sole comprising an insert and a method of manufacturing the same.

Shoe soles used as a cushioning member of shoes are generally manufactured through press molding.

However, the press-molding as described above requires a complicated processing process, and in addition to the large loss of time and raw materials in terms of productivity and workability, there is a disadvantage that requires a lot of labor.

Recently, the trend of using injection molding which can reduce time loss or raw material loss by simplifying complicated processing processes.

Looking at the manufacturing method of the shoe brush using the injection molding as follows.

After drying the raw material that is the basic base of the shoe brush in the temperature condition considering temperature, humidity, and compound characteristics, and supplying it to the injector, setting the injection condition by controlling the injector temperature and plate temperature with a pump or compressor, and then injecting the injector. The preparation process for supplying raw materials is carried out.

The raw material is injected into the cavity of the upper mold and the lower mold according to the mold and compound characteristics while adjusting the speed according to the state of the injection product.

After a predetermined vulcanization time has elapsed while the upper mold and the lower mold are clamped, the upper mold and the lower mold are opened and the product is taken out.

When the extracted product is processed by post-processing such as cooling, sorting, and inspection, finally, a shoe sole can be manufactured.

As such, a method of manufacturing shoe soles using injection molding has been widely applied in recent years in recognition of simplification of processes, improvement of productivity, and superior quality.

Until now, shoe soles manufactured through the above manufacturing method were mostly made of one material or color of the base, and recently, as the functional needs of the shoes are gradually emphasized in addition to the needs of consumers who prefer various designs, Shoe soles with various colors, designs and functionality are on the market.

Therefore, in the present invention, the function related to the shoe sole with functionality among the various types of shoe soles above, that is, inserting a separate insert into the arch portion of the base (the area supported by the inner concave portion of the sole) to enhance the cushioning function The technique of the shoe sole which is made is the object of the draft.

In the case of a normal shoe brush, when the shoe is walking, the arch portion of the base takes a lot of load, and thus deformation occurs more severely than other parts of the base.

To compensate for this weakness, shoe soles are provided that include inserts that replace the base arch with a harder material.

Looking at the manufacturing method of a shoe sole including such an existing insert as follows.

As shown in FIG. 1, raw materials are injected into the cavity 30 of the upper mold 10 and the lower mold 20 and crosslinked for a predetermined time, and then the upper and lower molds 10 and 20 are opened and molded therein. Taking out the base 40a which completes manufacture of the base 40a which becomes the base of a shoe brush is completed.

At this time, the base 40a has a groove 60 for inserting the insert 50a.

Subsequently, when the insert 50a manufactured through the separate process is bonded while being inserted into the groove 60 of the base 40a, the base 40a having the insert 50a is completed.

Here, reference numeral 70 denotes a liner for injection of raw materials.

The insert is made of a hard material having a higher hardness than that of the base having a cushioning tendency.

The shoe sole manufactured in this way has a high hardness insert in the inner arch portion, which can sufficiently support the load applied when walking the shoe, thus supporting the sole of the foot in a balanced manner.

However, the existing method for manufacturing a shoe brush including the insert as described above has a number of disadvantages.

1) After manufacturing the base and the insert constituting the shoe brush, respectively, after attaching the adhesive through a separate manual work, such as workability is low and productivity is low.

2) Molding error occurs because it is difficult to accurately calculate the shrinkage ratio of the base or the insert in relation to the injection molding. As a result, the insert does not fit well in the groove of the base.

3) When the insert is assembled, a lot of adhesive is buried between the interface with the base, which lowers the appearance, thereby degrading the overall quality of the shoe sole.

Therefore, the present invention has been devised in view of the above, by inserting the insert into the arch of the base directly into the cavity of the mold in the state of simultaneous injection at the time of the base molding to manufacture a shoe sole of the insert integrally, To reduce the number of separate attachments, such as to provide a method of manufacturing a shoe sole including a functional insert to improve the workability and productivity associated with the production of the shoe sole, and to provide a shoe sole manufactured so There is a purpose.

In addition, another object of the present invention is to place each functional insert at a position corresponding to the main ground of the shoe in the manufacture of the shoe sole, and then directly injection molded with the base to enable the shoe sole to serve as a shoe sole In this way, the sole of the shoe can be configured with only the sole of the shoe in the state of removing the shoe sole when making the shoe. Accordingly, the shoe sole can be removed from the three large components constituting the shoe. In view of the above, there is provided a method of manufacturing a shoe brush including a functional insert which can effectively reduce cost and weight, and also significantly shorten the process.

The shoe sole manufacturing method of the present invention for achieving the above object is a shoe sole manufacturing method comprising a functional insert, the same material as the base material in the cavity of the upper mold and the lower mold for forming the base of the shoe sole In the state in which the insert having a predetermined thickness of the edge layer is seated, the insert together with the base is characterized in that the injection molding at the same time.

In addition, the temperature conditions of the mold for crosslinking during the injection molding of the insert and the base are 160 to 180 ° C, and the time condition is 5 to 10 minutes.

In addition, the insert is located in a position corresponding to the arch portion of the base in the mold cavity is characterized in that it has a functionality capable of supporting the indented portion of the sole that is heavily loaded.

In addition, the inserts are each disposed at a position corresponding to a site where load is concentrated over the entire area of the shoe sole in the mold cavity, and then integrally injection molded with the base so that the shoe sole itself can function as a shoe sole. It is characterized by that.

In addition, the insert is characterized in that it is arranged in each position corresponding to at least five sites including the heel portion and the front foot of the sole.

In addition, the insert is characterized by using a material and color different from the material and color of the base.

On the other hand, the shoe brush of the present invention for achieving the above object is characterized in that in the shoe brush comprising a functional insert, the base and the insert of the shoe brush is integrally molded by injection molding together.

In addition, the insert is characterized in that the injection molded integrally with the base at the arch portion of the base.

In addition, the insert is characterized in that the injection molded integrally with the base in at least five places, including the heel portion and the front foot portion where the load is concentrated over the entire area of the shoe brush.

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

According to the present invention, a method of manufacturing a shoe brush including a functional insert includes placing an insert having a border layer made of the same color and material as the base color and material in a cavity of a mold, and then placing the insert in a predetermined position. It is a method of manufacturing an integral base and an insert by foam-molding together in a metal mold | die.

At this time, the insert has a constant thickness layer with the same color and material as the base color and material, and thus does not become a gray color in a high temperature mold.

If the insert is placed in the mold without the edge layer, the temperature of the mold is maintained at a high temperature of about 160 ~ 180 ℃ in the initial stage of molding from the time the mold is clamped until the resin is injected and filled Since some part is melted and mixed with each other, some boundary areas with the base side are colored with each other, resulting in a decrease in functionality and a cause of defects.

Therefore, these inserts are made of materials with high hardness, high impact absorption and rebound elasticity, for example, functional (impact absorption and rebound elasticity) materials having functional and various colors, and thus have various colors, hardness, and specific gravity compared to the base. These other inserts are provided in the mold with walls formed as a border layer so that they are not gray.

Inserts with a constant thickness, for example 5 to 15 mm thick, can be manufactured by separate plastic injection molding. When inserting shoe soles, use the pre-manufactured inserts. do.

This will be described in more detail as follows.

Figure 2 schematically shows a process for the manufacturing method of a shoe brush comprising a functional insert according to the present invention.

As shown in FIG. 2, the insert 50b manufactured previously is inserted in the predetermined position (for example, arch part of a base) in the cavity 30 which the upper mold 10 and the lower mold 20 form. To place.

At this time, the insert 50b may be held in close contact with the cavity wall surface side by a protruding jaw (not shown) formed at the bottom side of the cavity 30 to maintain an accurate position.

The edges and bottoms of the insert 50b have a constant thickness on the edges and bottoms of the inserts 50b except for the surface closely contacted to the cavity wall and the surface exposed upward, and the edge layer 80a is partially melted in the mold. do.

Here, the surface that is in close contact with the cavity wall side of the insert and the surface that is exposed upward are directly contacted with the cavity surface, so there is no fear of brown color and there is no need to leave a border layer. However, it is desirable to have an edge layer for proper thickness preservation of the insert.

After the insert is placed in the cavity of the mold, the resin, which is the main raw material of the base 40b, is injected through the liner 70 while the upper mold 10 and the lower mold 20 are clamped. Crosslinking is carried out under constant temperature and constant time for foaming.

For example, a mixture in which a crosslinking agent, a blowing agent, or the like is added to the vinyl resin, which is the main raw material of the base, is melt-injected by an injector, and the mold temperature is maintained at about 160 to 180 ° C for 5 to 10 minutes. Heat about.

After completing the appropriate cross-linking treatment as described above, when the mold is opened, the shoe sole having the base and the insert, that is, the insert, is foamed as the volume is increased, thereby obtaining a finished shoe sole form.

The shoe sole obtained by injection molding the base together with the insert is clearly distinguished in terms of color and material between the insert and the base, and is manufactured together by another injection molding, thus completely eliminating the concern of poor quality. In addition, the number of processes can be drastically reduced in terms of workability and productivity, thereby increasing the efficiency of work and production related to shoe sole manufacturing.

On the other hand, the present invention provides a method of manufacturing a shoe sole to use the shoe sole itself as a shoe sole utilizing the injection molding method of the functional insert as described above.

To this end, as shown in FIG. 3, a plurality of inserts 50c prepared in advance are placed at predetermined positions in the cavity 30 formed by the upper mold 10 and the lower mold 20.

At this time, the insert 50c may maintain an accurate position while being in close contact with the bottom surface of the cavity by a protruding jaw (not shown) or a groove (not shown) formed on the bottom side of the cavity 30.

In addition, the position where the insert 50c is disposed includes a position corresponding to a part contacting with the ground while the load is concentrated over the entire area of the shoe brush when the user walks in the shoe, for example, the heel part, the front part of the sole, and the like. It is preferable to arrange | position each in the position corresponding to at least 5 site | parts.

In the case of the insert 50c, although an embodiment of the present invention proposes a circular insert, the insert 50c may be changed to an appropriate size and shape or number according to the distribution shape of the load applied to the shoe sole.

The insert 50c has a border layer 80b of a constant thickness on the edge and the bottom side except for the surface exposed upward, and the edge layer 80b is partially melted in the mold and mixed with the base material, and the outside It is possible to construct the bottom layer.

After the insert is placed in the cavity of the mold, the vinyl material which is the main raw material of the base 40c through the liner 70 while the upper mold 10 and the lower mold 20 are clamped. The mixture which added the crosslinking agent, foaming agent, etc. to this is melt-injected by the injector means, and it heats about 5 to 10 minutes, maintaining the temperature of the metal mold | die about 160-180 degreeC.

After completing the appropriate cross-linking treatment as above, the shoe sole having the base and the insert, that is, the insert is foamed while increasing the volume to obtain a finished shoe sole form.

As such, each insert is disposed at a predetermined position on the bottom surface of the shoe sole, and in particular, when the same material as that of the shoe sole is applied as the insert material at this time, the shoe sole itself may be used as the shoe sole.

For example, when you walk in shoes, an insert made of the same material as the sole of the shoe touches the ground, and the shoe sole can act as a cushion member, so the shoe sole can be used as a shoe sole. .

Accordingly, since the shoe can be manufactured using only the sole of the shoe, which serves as the sole of the shoe, and the upper fabric or the leather part, the shoe manufacturing cost can be greatly reduced.

In particular, the insert that enters the sole of the shoe sole is made of the same material as the sole of the shoe sole, and the shoe sole is made of a lighter material as before, so that the overall weight of the shoe can be drastically reduced. This may indicate superiority in terms of usability.

As described above, the present invention provides a method of manufacturing a shoe sole by simultaneously injection molding a functional insert and a base, and thus, the number of processes can be drastically reduced compared to the conventional attaching method. There is an advantage to improve productivity.

In addition, by inserting the insert in the sole position of the sole of the shoe so that the shoe sole can act as a shoe sole, it is possible to manufacture the shoe without the shoe sole, thereby reducing the production cost of the shoe, the weight of the shoe There is also an effect that can be significantly reduced.

Claims (9)

In the shoe sole manufacturing method comprising a functional insert, The insert is molded integrally and simultaneously with the base in a state in which an insert having a constant thickness border layer made of the same material as the base material is placed in the cavity of the upper mold and the lower mold for forming the base of the shoe sole. Shoe sole manufacturing method comprising a functional insert made of. The method of claim 1, wherein the temperature of the mold for crosslinking during the injection molding of the insert and the base is 160 to 180 ℃, the time condition is 5 to 10 minutes, shoe sole manufacturing method comprising a functional insert. The method of claim 1, wherein the insert is placed in a position corresponding to the arch portion of the base in the mold cavity to have a functional insert capable of supporting a heavily loaded inner sole of the sole of the foot Shoe brush manufacturing method comprising. 2. The insert according to claim 1, wherein the inserts are each positioned at a position in the mold cavity corresponding to the site where the load is concentrated over the entire area of the shoe sole, and then integrally injection molded with the base so that the shoe sole itself is the sole of the shoe sole. Shoe sole manufacturing method comprising a functional insert, characterized in that to enable the function. The method of claim 4, wherein the insert is a shoe sole manufacturing method comprising a functional insert, characterized in that arranged in each position corresponding to at least five sites including the heel portion and the front of the sole. The method of claim 1, 3, 4, wherein the insert is a shoe sole manufacturing method comprising a functional insert, characterized in that using a material and color different from the material and color of the base. delete delete delete

Images