KR100560371B1 - A manufacturing method and molding machine of sole of shoe with improving multi color, density and functional - Google Patents

Abstract

The present invention relates to a manufacturing method and a mold of a shoe sole that can be attached to a variety of colors, specific gravity and functionality, by using an injection molding method by inserting an injection-type mold divided into a molding part and an insert part into a base mold By making an integrated shoe midsole with various colors, specific gravity and functionality, it is possible to manufacture shoe midsoles with various colors, specific gravity and functionality while maintaining high efficiency in terms of productivity and workability. In addition, to provide a shoe sole manufacturing method and mold that can be attached to a variety of colors, specific gravity and functionality that can meet the needs of consumers who prefer a variety of designs.

Shoe, sole, mold, injection, various colors, specific gravity, functional

Description

A manufacturing method and molding machine of sole of shoe with improving multi color, density and functional}             

1 is an exploded perspective view showing the upper and lower molds and the second mold of the base mold of the shoe brush manufacturing apparatus according to the present invention according to the present invention

2 is a process chart showing a process of manufacturing a cold insert portion of a shoe brush manufacturing apparatus according to the present invention

Figure 3 is a process diagram showing the process of the shoe brush manufacturing apparatus according to the present invention

Figure 4 is a block diagram showing several steps of the shoe brush manufacturing method according to the invention

Figure 5 is a process diagram showing another embodiment of a shoe brush manufacturing method according to the present invention

6 and 7 is a perspective view showing a shoe brush manufacturing apparatus according to the prior invention

<Explanation of symbols for the main parts of the drawings>

10: first mold 11: cavity

12: liner for resin injection 13: liner for air vent

13a: air vent hole 15, 15a: insert portion

20: second mold 20a: cavity                 

21: air vent liner 30: base mold

31: resin inlet 40, 40a: shoe brush

The present invention relates to a manufacturing method and a mold of a shoe brush that can be attached to a variety of colors, specific gravity and functionality, and more specifically, by using an injection molding method by inserting an injection-type mold divided into a molding part and an insert part into a base mold. It is possible to manufacture an integrated shoe midsole with a variety of colors, specific gravity and functionality, thereby manufacturing shoe midsoles with various colors, specific gravity and functionality while maintaining high efficiency in terms of productivity and workability. The present invention relates to a shoe sole manufacturing method and mold capable of attaching various colors, specific gravity, and functionality to satisfy the needs of consumers.

Typically, the shoe brush is a component forming the bottom of the shoe, serves as a cushioning member of the shoe, the appearance (side circumference and bottom) is manufactured to have a variety of shapes, shapes, colors to improve the commerciality of the shoe.

Shoe soles that function as described above have been manufactured by press-types, but the processing process is complicated, production is lower compared to working hours, and labor costs are increased accordingly. There is a trend to use an injection shoe shoe manufacturing method that can reduce time and economic losses, such as easy and cost-saving.

Here, a brief description of the conventional shoe brush manufacturing mold and its manufacturing method with reference to Figure 6 attached as follows.

The conventional mold is largely composed of the upper mold 100 and the lower mold 110, the lower mold is formed of two shoe sole cavity 120, that is, the cavity 120 corresponding to the shoe sole of the first group, The resin injection liner 101 is formed at one side of the cavity 120, and the air vent liner 102 is formed at the opposite side of the cavity 120.

In addition, the upper mold 100 is formed to protrude in a shape corresponding to the cavity 120 of the lower mold 110, one side of the air vent hole (not shown) for providing a vacuum to the air vent liner Formed.

Therefore, in the state in which the upper mold 100 and the lower mold 110 are clamped, resin is injected into the resin injection liner 101 to fill the cavity with resin, and the mold is heated for a predetermined time.

Finally, the upper mold 100 and the lower mold 110 are separated from each other at the same time the shoe brush is foamed and released from the mold to complete the manufacture of the shoe brush.

Meanwhile, recently, shoe midsoles with various colors and functionalities have been manufactured to meet the needs of consumers who prefer various designs.

In particular, the inner part of the midsole that was severely deformed due to a lot of force was easily deformed because it could not exert great support for the same load as other parts of the midsole, and the user easily felt tired.

Therefore, conventionally, as shown in FIG. 7 attached to solve the above problems, the inner portion of the shoe midsole (hereinafter referred to as insert portion) 210 is made of a material having a high hardness and injection as described above. The midsole 200 manufactured by the molding method was attached using an adhesive.

However, the manufacturing method of the midsole as described above had a lot of work difficulties in attaching the insert portion 210, and caused an appearance defect in appearance.

In addition, since a complicated processing process is required, such as to be injected after each injection, it requires time loss and a lot of labor and manufacturing equipment, which causes a rise in manufacturing cost, thereby greatly reducing productivity.

Accordingly, the present invention has been invented in view of the above, and is an integrated type having various colors, specific weights, and functionalities by using an injection molding method in which an injection mold divided into a molding part and an insert part is inserted into a base mold. By allowing shoe midsoles to be manufactured, it is possible to manufacture shoe midsoles with various colors, specific gravity and functionality while maintaining high efficiency in terms of productivity and workability, and to meet the needs of consumers who prefer various designs. It is an object of the present invention to provide a mold and a manufacturing method of a shoe brush capable of attaching various colors, specific gravity and functionalities.

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

In the manufacturing method of the shoe sole according to the present invention, the cold insert portion pre-fabricated in the low temperature mold separated from the lower mold of the mold is placed in a predetermined position, and the low temperature mold including the cold insert portion is bonded into the high temperature mold lower mold. And subsequently injecting and crosslinking the resin which becomes the main raw material of the shoe midsole, and foaming the shoe midsole having the cold insert portion integrally.

Here, it is preferable that the temperature of the said low temperature metal mold | die is set to 50-70 degreeC, and the said high temperature metal mold | die lower mold temperature is set to 170-180 degreeC.

In particular, the process of foam molding the shoe midsole having the cold insert portion, the cold insert portion insertion arrangement step of inserting and placing the produced cold insert portion in the shoe brush-shaped cavity formed in the second mold,

A second mold insertion arrangement step of inserting the second mold into the lower mold of the base mold and clamping the upper mold;

Injecting the resin which is the main raw material of the shoe midsole into the second mold combined with the base mold, and the injection step of injecting the shoe midsole by opening the mold after a predetermined cross-linking time at a predetermined temperature at the same time as the injection. .

In addition, the cold insert portion is characterized by being made of a material having a high hardness and high impact absorption and rebound elasticity having a functional and various colors.

In addition, the temperature conditions of the base mold is 170 ~ 180 ℃, the temperature conditions of the second mold is 50 ~ 70 ℃ in the second mold insertion arrangement step.

In addition, the temperature conditions required for crosslinking in the injection step is 170 ~ 180 ℃, the time conditions are characterized in that 5 to 10 minutes.

In addition, in the cold insert portion insertion arrangement step, the cold insert portion may be disposed inside the middle part of each cavity of the second mold corresponding to the position supporting the arch portion of the sole, which is a portion of high force, and may have functionality. It is done.

In addition, two, one in the front, middle and back portions of each cavity of the second mold corresponding to the position where the load is concentrated over the entire area of the sole of the shoe, the front of the sole, the arch and the heel of the sole And two are placed and then foam molded to allow each cold insert to directly function as a shoe outsole without a shoe outsole.

In addition, the process of foam molding the shoe midsole having the cold insert portion, after demolding the product further comprises a re-injection preparation step of setting the cold insert portion into a temperature capable of inserting the cold insert portion in the second mold in a high temperature state using a rapid cooling means; It is characterized by.

In the re-injection step, the rapid cooling means is a cooling device using an air compressor, and is cooled for 5 to 6 minutes under a temperature condition of -10 ° C.

This will be described in more detail as follows.

4 is a block diagram showing various steps of manufacturing a shoe midsole of the present invention, the characteristics of each step are as follows.

1) Injection Preparation

The 1st metal mold which can manufacture a cold insert part, the at least 2 2nd metal mold in which the cold insert part is inserted, and the top plate and bottom plate base metal into which the said 2nd metal mold is inserted are arrange | positioned in order.

2) Cold insert part work step

First, when the resin is injected through the resin inlet on one side of the upper mold and the lower mold of the first mold, the resin is injected into and filled into a cavity having a shape of a part of each shoe inner portion through the resin mold liner of the lower mold.

Next, the injection of the resin is completed to produce a cold insert portion.

At this time, the temperature of the first mold is set to 50 ~ 70 ℃ bar, which can work at a mold temperature of about 50 ~ 70 degrees can be used as a general plastic injection machine and a rubber press.

In addition, the resin is made of a cold insert portion is injected at a temperature of 110 ℃ made of a material having a high hardness and high impact absorption and rebound elasticity having a functional and various colors. In other words, the cold insert is formed in the shape of the inner portion of the shoe midsole before foaming.

3) Cold insert part insertion arrangement step

In this step, the pre-prepared cold insert is inserted into one side of the second mold inner portion.

In this step, when the temperature of the second mold is 80 ° C. or higher, since the cold insert part melts at the moment of insertion, the insert cannot be inserted. Therefore, it is necessary to maintain the temperature of the second mold at 50 ° C. to 70 ° C.

4) second mold insertion arrangement step                     

The second mold having the cold insert portion inserted therein is inserted into the base mold at 170 to 180 ° C.

In this step, the second mold is inserted into the lower mold of the base mold while the temperature of the second mold is maintained at 50 to 70 ° C., and the lower mold is clamped with the upper mold.

5) Injection stage

When the resin is injected through the resin inlet on one side of the upper mold and the lower mold of the base mold, the resin is injected into the cavity of the second mold having the respective shoe brush shapes through the resin injection liner of the lower mold.

At this time, the resin is a resin of a different color and material than the resin used in the cold insert portion, which is the main raw material of the shoe brush.

For example, the resin is melt-injected through an injector means in a granulated state in which various mixed raw materials, a crosslinking agent, a foaming agent, and the like are added to a vinyl resin.

Next, when the injection of the resin is completed, the base mold is heated to a predetermined temperature for a predetermined time, and then moved to separate the upper mold in the upward direction, the shoe brush is foamed to increase the volume from each cavity and demoulding do.

At this time, the resin in the state including the cold insert portion needs a crosslinking time of 5 to 10 minutes at a temperature of 170 ~ 180 ℃.

In this step, the cold insert portion and the resin portion are foamed in one piece while forming different materials and colors. In other words, the inner part of the shoe and the rest except for the inner part are made of an integrated shoe brush of two colors of different materials and colors.

6) Re-Injection Preparation

After demolding the product at a high temperature, a rapid cooling device, for example, an air compressor, is used to maintain the first set temperature of the second mold, 50 to 70 ° C., and to start repeated production.

In this step, it is preferable to have another second mold to enable continuous production before the cooling of the second mold is completed.

As such, the manufacturing method of the shoe brush that can be attached to a variety of colors, specific gravity and functionality according to the present invention is manufactured through the above six-step process while making the most of the advantages of the injection molding method, it has high efficiency in terms of workability and productivity. It can keep and manufacture shoe brush.

In addition, the inner portion of the shoe composed of a cold insert portion and the rest of the collar is clearly distinguished, the inner portion is a high hardness, impact absorption and rebound elasticity in the portion corresponding to the arch portion of the sole under the high force It can be expected to improve in terms of marketability due to the formed material.

On the other hand, the injection method including a separate cold insert as described above can be used as another method, with reference to the accompanying Figure 5 will be described in more detail as follows.

Typically, shoe soles are attached to the outside of the midsole with a stronger out-sole. However, such shoe soles have a disadvantage in that the weight becomes heavier as the outsole is attached.

Therefore, conventionally, some methods of manufacturing shoe soles have been developed by developing a new material of light and high strength, but this is not practical because of the disadvantage of excessive cost increase.

Therefore, the present invention provides a method that can serve as a function of the outsole as the shoe sole is manufactured by the injection method including a cold insert to solve the above problems.
To this end, as shown in FIG. 5, in the present invention, the sole of the midsole is positioned at a position supporting the front heel portion, the arch portion, and the heel portion of the sole, which is a portion where the load is concentrated over the entire area of the shoe sole. By placing two, one and two cold inserts 15a respectively in the front, middle and back portions of each cavity of the corresponding second mold and injecting them integrally with the midsole, no separate outsole is attached. It was manufactured by the midsole 40a which does not need to be.

That is, by forming only a portion of the force receiving portion of the bottom of the midsole, rather than the structure covering the entire midsole as in the prior art as a cold insert portion 15a of a strong material, the portion can perform the role of the shoe outsole.

Therefore, the manufacturing method of the shoe brush as described above does not need to attach the outsole separately, thereby reducing the cost, and can meet the needs of consumers, such as to achieve a lightweight shoe.

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

1 is an exploded perspective view showing the upper mold and the lower mold and the second mold of the base mold of the shoe brush manufacturing apparatus according to the present invention, Figure 2 is a cold insert portion of the shoe brush manufacturing apparatus according to the present invention It is a process chart which shows a process.

3 is a process chart showing the process of the shoe brush manufacturing apparatus according to the present invention.

The present invention relates to a shoe sole manufacturing mold comprising a top mold and a bottom mold including a cavity for molding a shoe brush shape and a liner for resin injection.

The lower mold 30a includes a second mold 20 having a cavity 20a and a liner 21, and a base mold 30 having a groove 32 portion capable of detaching the second mold 20. Characterized in that consisting of a combination.

In particular, the second mold 20 is characterized in that it can be combined in the base mold 30 maintaining the temperature of about 170 ~ 180 ℃ in a state of maintaining a temperature of about 50 ~ 70 ℃.

As shown in the present invention, the apparatus for manufacturing a shoe brush capable of attaching various colors, specific gravity, and functionality to the present invention includes a first mold 10 capable of manufacturing a cold insert portion 15, and the cold insert portion 15. It consists of two second molds 20 to be inserted and the upper and lower base molds 30 to which the second mold 20 is inserted.

The first mold 10 is composed of an upper mold 10b and a lower mold 10a, and the lower mold 10a is formed with four cavities 11 having a shape of a part of the inner part of the shoe. Resin injection liner 12 is formed on one side, and an air vent liner 13 is formed on the opposite side.

In addition, the upper mold (10b) is formed to protrude in a shape corresponding to the cavity 11 of the lower mold (10a), one side of the air vent hole (13a) for providing a vacuum to the air vent liner (13) Is formed.

Therefore, in the state where the upper mold 10b and the lower mold 10a are clamped, resin is injected through the resin injection liner 12 to fill the cavity 11 with resin.

After that, when the predetermined time elapses, the cold insert portion 15 is manufactured because the temperature of the first mold (50-70 ° C) is lower than the injection temperature (110 ° C) of the resin.

The resin used in the cold insert unit 15 is harder than the resin melt-injected through the injector means in a granulated state in which various mixed raw materials, a crosslinking agent, a blowing agent, and the like are added to the commonly used vinyl resin (Ethyl Vinyl Acetate). It is a high material with high impact absorption and resilience, and can be composed of various colors.

On the other hand, the cold insert portion 15 prepared in advance in the first mold 10 is inserted into a pair of shoe sole-shaped cavity 20a formed in the second mold 20, respectively.
For example, as shown in FIGS. 1 and 3, the cold insert portion 15 is each cavity 20a of the second mold 20 corresponding to a position supporting the arch portion of the sole, which is a portion of the high force. Inside the middle part of the

The second mold 20 is formed of a structure in which only a portion in which the pair of cavities 20a having the shoe sole shape is formed in the lower mold 30a of the base mold 30 is separated from each other. A pair of cavities 20a having a shape are formed, and a liner connected to a resin injection liner (not shown) formed in the base mold 30 is formed at one side around the cavity 20a. On the other side, an air vent liner 21 is formed.

Meanwhile, the second mold 20 into which the cold insert part 15 is inserted is inserted into and mounted on the lower mold 30a of the base mold 30.

The base mold 30 is composed of an upper mold 30b and a lower mold 30a. An air vent liner and a resin injection liner 31 are formed in the lower mold 30a, and the second mold 20 The groove 32 is formed to correspond to the shape of the second mold 20 is inserted and mounted, the upper mold 30b, the shoe corresponding to the shape of the cavity 20a formed in the second mold 20 The upper part of the sole is formed.

Therefore, after the resin is injected into the resin injection liner 31 while the upper mold 30b and the lower mold 30a of the base mold 30 are clamped, the resin is filled into the shoe brush-shaped cavity 20a. The mold is heated for a certain time.

At this time, even when the second mold 20 is inserted into the base mold 30 at a high temperature (170 to 180 ° C.), the cold insert is maintained at the instant because the second mold 20 maintains a proper temperature (60 to 80 ° C.). The part 15 is able to maintain the state without melting.

On the other hand, the second mold 20 inserted into the base mold 30 is raised to a temperature equal to the temperature of the base mold 30 by heat conduction after a predetermined time.

Since the mold is usually made of aluminum, it doesn't take long to raise it to the desired temperature.

In addition, the resin is a resin of a different color and material than the resin used in the cold insert portion is used, the injector means in a granulated state by adding a variety of mixed raw materials, crosslinking agents, foaming agents, etc. to the commonly used vinyl resin It is melt-injected through, which is the main raw material except for the inner part of the shoe midsole.                     

Therefore, when the injection of the resin is completed, the base mold 30 maintains a predetermined temperature (170 ~ 180 ℃) and after a certain crosslinking time (5 ~ 10 minutes), the upper mold 30b and the lower mold 30a are separated. At the same time the shoe sole is foamed and demolded from the mold to complete the manufacture of the shoe sole.

Meanwhile, since the second mold 20 into which the shoe brush is injected is a high temperature (170 to 180 ° C.), the cold insert part 15 may not be inserted and mounted when the shoe brush is remanufactured. 20) is provided so that the second mold 20 is entered into production before completion of cooling by the cooling device.

It is preferable that the cooling device uses a cooling device using an air compressor.

For example, the high temperature second mold into which the shoe midsole is injected is placed in the cooling apparatus, and the limit switch is turned on while sliding on.

Thus, the air cooler is operated (discharge temperature-10 DEG C) to cool the second mold (5-6 minutes).

Afterwards, the digital thermometer senses the temperature of the second mold, stops the operation of the air cooler, and slides it off to put the second mold into production again.

Therefore, the shoe sole manufactured by the above device is made of an integral part of the inner portion and the remaining portions of different materials and colors, the inner portion of the shoe sole has a high hardness, good shock absorption and rebound elasticity It can be given, and can be formed in a variety of colors to improve the productability can meet the needs of consumers who prefer products with a variety of design and functionality added.

As described above, according to the manufacturing method and mold of the shoe brush capable of attaching the color, specific gravity, and functionality according to the present invention, a method of injection molding by inserting an injection-type mold divided into a molding part and an insert part into a base mold By using it to be able to manufacture an integral shoe midsole having a variety of colors, specific gravity and functionality, it is possible to manufacture the midsole of the inner portion of the shoe separately with a high hardness material and then integrally injection molding it with the midsole.

Therefore, it is possible to manufacture shoe midsoles with various colors, specific gravity and functionality while maintaining high efficiency in terms of productivity and workability, which satisfies the desires of consumers who prefer various designs by improving the productability according to various colors and functions. There is an effect that can be made.

In addition, by placing a plurality of cold inserts in the bottom position of the midsole and integrally injected with the midsole, it is possible to manufacture a midsole that does not need to attach a separate outsole, which does not need to attach the outsole separately It is possible to meet the needs of consumers by reducing costs and making shoes lighter.

Claims (11)

delete The cold insert portion pre-fabricated is placed in the mold separated from the lower mold of the mold, and the mold including the cold insert portion is bonded to the lower mold of the mold, followed by injecting and crosslinking the resin, which is the main raw material of the shoe sole, to integrally form the cold insert portion. In the manufacturing method of the shoe sole capable of attaching a variety of colors, specific gravity and functionality, including the process of foam molding the shoe sole having The process of foam molding the shoe midsole having the cold insert part includes a cold insert part insertion arrangement step of inserting and placing the manufactured cold insert part into a shoe brush-shaped cavity formed in a second mold, and the second mold by a base mold. The second mold insertion arrangement step of inserting and mounting the lower mold and clamping the upper mold, and injecting the resin, which is the main raw material of the shoe sole, into the second mold combined with the base mold and simultaneously injecting the resin into a temperature of 170 to 180 ° C. Method of manufacturing a shoe brush that can be attached to a variety of colors, specific gravity and functionality, characterized in that the injection step of injecting the shoe midsole by opening the mold after the cross-linking time of ~ 10 minutes. delete The method of claim 2, wherein the temperature conditions of the base mold in the second mold insertion arrangement step is 170 ~ 180 ℃, the temperature conditions of the second mold is 50 ~ 70 ℃ characterized in that a variety of colors, specific gravity and functional attachment How to make a shoe brush. delete The method of claim 2, wherein in the cold insert inserting step, the cold insert part is disposed inside the middle part of each cavity of the second mold corresponding to the position supporting the arch of the sole, which is a high force part. Method of manufacturing a shoe brush that can be attached to a variety of colors, specific gravity and functionality characterized in that it can be. The method of claim 2, wherein in the cold insert inserting step, the cold insert portion is the front portion, the middle portion of each cavity of the second mold corresponding to the position supporting the heel portion, arch portion and heel portion of the sole which is the portion where the load is concentrated And two, one, and two arranged at the rear and then foamed to allow each cold insert to directly function as a shoe outsole without shoe insoles. Manufacturing method. According to claim 2, wherein the process of foam molding the shoe midsole having the cold insert portion, after the product demoulding using a rapid cooling means using a re-injection preparation step of setting the cold insert portion to a temperature capable of placing the cold insert portion in the second mold Method of manufacturing a shoe brush capable of attaching a variety of colors, specific gravity and functionality, further comprising a. 9. The shoe brush of claim 8, wherein the rapid cooling means in the re-injection step is a cooling device using an air compressor, and cools it for 5 to 6 minutes under a temperature condition of -10 ° C. Manufacturing method. delete The upper mold and lower mold including a cavity for molding a shoe brush shape and a liner for resin injection, wherein the lower mold 30a includes a second mold 20 having a cavity 20a and a liner, and the second mold. In the mold for manufacturing shoe soles capable of attaching various colors, specific gravity, and functionalities, which are composed of a combination type consisting of a base mold 30 having a groove 32 portion capable of attaching and detaching (20), The second mold 20 is a variety of colors, characterized in that it can be combined in the base mold 30, which maintains a temperature of about 170 ~ 180 ℃ while maintaining a temperature of about 50 ~ 70 ℃, Mold for manufacturing shoe soles with specific gravity and functionality.

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