KR100889696B1 - A thin cross-sectional model shoes which is fabricated by dry pulp molding process - Google Patents

Abstract

The present invention relates to a model shoe made of pulp material manufactured by dry compression molding using a mold, so as to achieve excellent bonding strength and an efficient production process while maintaining a three-dimensional feeling peculiar to a shoe even with a thin two-piece pulp molding method. The sole is designed so that the center and the heel end (preferably the front heel end) have an edge of the side cross-sectional shape 12 away from the ground, and the upper is the same as the top side projection shape of the sole side cross-sectional shape 12. It is designed to have a side bottom portion of the bottom side lateral projection shape.

In addition, the upper part of the upper of the model shoe has a curved portion 23, 23 having a predetermined curvature or more so as to save the three-dimensional texture of the shoe even in a thin molding section.

As described above, the sole edge portion and the upper side lower end portion 22 of the upper may be adjacent to each other in close proximity to each other while maintaining the three-dimensional appearance of the shoe due to the unique side projection shape of the present invention. Therefore, this model shoe is capable of efficient two-piece molding design that can improve the bonding strength and design quality of the product at the same time, and further reduce the manufacturing cost by minimizing the adhesive input due to the thin molding section and the reduction of the adjacent space. In addition to the effect of improving the process efficiency, as well as excellent combustion effects during various ceremonial events.

Pulp, Molding, Dry, Wet, Shoes, Gluing, Upper, Soles

Description

A thin cross-sectional model shoes which is fabricated by dry pulp molding process}

The present invention relates to a model shoe of a two-piece pulp mold having a three-dimensional surface quality and a bonding strength simultaneously produced using a dry pulp molding method used for packaging materials.

Traditional funeral shoes or various ceremonial and ceremonial shoes have been traditionally made of cloth or paper shoes.

These model shoes were buried on the feet of the dead or used as substitutes for artifacts and burned during the ceremonies. Therefore, it is natural that it is made of a natural material that has a shape and a texture of a classic shoe to some extent and is easily rotten or burned and does not cause environmental pollution.

As a form of primitive model shoes, there is a 'personal shoes' of Korea Patent Publication No. 2007-0027855. This model shoe is used to vet the body of the deceased and is made of natural materials such as burlap and paper, avoiding the material of non-corrosive chemicals, which means to return to the soil with the body at the time of burial.

Looking at the specific shape and structure, natural materials are divided into upper materials, upper uppers, lower uppers, strings, midsoles, and window heel according to tensile strength, and attached to each other. Is no different from ordinary shoes.

Another type of existing model shoes is the ancestor shoes of Korean Patent Publication No. 0715116. The ancestor shoes are imitation shoes made of cloth made to be used in place of shoes worn by ancestors or spirits when burned relics in the case of celestial worship or shamanship in temples. It is designed to be incinerated efficiently by using paper in thick sole. However, even in this case, the typical configuration of attaching the main parts of the shoes basically cut out into a plate shape is the same as the above-mentioned 'personal shoes'.

As the material of model shoes, the material of paper material is not necessarily a finished product of a plate type that can be cut out, but the pulp, which is the raw material of paper, is poured into water in a mold, and then hardened. Each can be completed separately and then bonded to each other can also complete the model shoes.

An example of model shoes manufactured using pulp can be found in the commercially available tool for manual adhesive manufacturing by wet molding. Recently, the product is filled with materials before molding regardless of the molding angle of the mold. The wet pulp molding technology, which is easy to remove the product after forming and molding, is easy to save the three-dimensional appearance of the shoes, but the surface is rough, the cross section is thick, the upper part of the irregular shape, the sole and the elaborate seam structure It consists of attachment joints of both materials using adhesive.

Meanwhile, a technique of molding a specific shape into a pulp using a mold is a technique that is widely used in various buffer materials and packaging materials manufacturing, and is divided into a wet method and a dry method.

For example, referring to 'Wet-dry mixed pulp mold system' of Korean Patent Laid-Open Publication No. 2001-0029367, a lower mold apparatus for sucking a pulp from a molding tank and forming a primary molded article, and a primary molded article disposed above the lower mold apparatus Basic wet pulp molding apparatus is disclosed, such as a rotary mold apparatus for molding a secondary molding by suctioning a secondary mold, and a tertiary mold apparatus, which is coupled to the rotary mold apparatus to form a third molded article and carries it to a conveyor belt. A warm air apparatus for drying the third molding product, a high pressure water washer disposed in the upper part of the molding tank to wash the primary mold of the lower mold apparatus with high pressure water, and a secondary mold of the rotary mold apparatus with high pressure air. A wet mold washing apparatus for continuous production, such as a pneumatic washer for washing, is disclosed.

In addition, referring to the `` Vacuum forming method and apparatus for fine powder pulp '' of Korean Patent Laid-Open Publication No. 2003-0059715, fine powder pulp is obtained by a dry mill using a grinder, and various additives such as adhesives are applied to the fine powder pulp depending on the purpose. Dry pulp mold apparatus using recycled waste paper which is mixed with dry powder, then moved to a pulp mold (mould) by using a vacuum method, and then pressurized and heated is molded. .

In general, the solution is filled with a large amount of water in the mold pulp, there is no high-pressure compression heating drying process in the molding process, and a relatively small amount of water than a wet mold method that goes through a separate drying process after molding The dry mold method, which press-fills the powdery pulp into the mold and thermosets (drys) the mold at the same time as compression molding, has higher strength and excellent surface quality of the finished product.

On the other hand, the wet molding method is characterized by the lack of sophistication in the mold release process because the product is not dried in the molding process, so the sophistication is reduced but the relatively free molding shape is free. On the other hand, the dry molding method performs drying of the product in the molding process. Therefore, it is possible to obtain an elaborate and smooth shape through high-temperature pressing, but it is impossible to mold when the cross-sectional angle inside the product is an acute angle that exceeds the vertical, because the product must be stiffly dried.

Therefore, the dry molding method exhibits mass productivity and low cost effect compared to the wet molding method, but it is difficult to mold a product having excellent three-dimensional effect.

Therefore, there are some technical difficulties in introducing dry pulp molding technology to model shoes.

A typical one is a part formed perpendicular to the side due to the concave inner shape surrounding the foot in the shape of the shoe, so this part should be an incision line for engagement.

However, when the side of the shoe is divided into two and joined up and down, it is not easy to secure the bonding strength, and due to the characteristics of the thin dry mold product, it is difficult to form a separate bonding structure for adhesion at the molding angle of the press mold close to the vertical. It is not easy.

Wet pulp mold, which is relatively free from the molding angle problem of press molds, is a product manufactured by dissociation, molding, mold release, and subsequent drying in water using paper and pulp as a raw material, and is mainly used for buffer materials such as eggs, fruits and vegetables, and containers. It has been used in fruit and vegetable trays, meat and fish trays, hair growth ports and the like.

Traditional wet pulp mold manufacturing method is to dissociate and dissociate 100 times of water to the raw material, and then suck the pulp liquid on the surface of the metal mesh which is long attached to the surface of the mold or attach the pulp by the natural drop type and detach it from the metal mesh. It is manufactured by drying in hot air, and the product manufactured through this process is mainly used as a cushioning material because of its rough surface and thick cross section.

In other words, in the case of a wet pulp mold, a solution of pulp is attached to the surface of the mold, so that the mold can be formed by increasing the thickness of the attached pulp even when the inclination of the mold is relatively large, but the surface is rough and not precise. Since it is difficult to make the thickness of the thin film below a certain thickness, it is disadvantageous in terms of overall quality or cost reduction for application to model shoes.

Dry pulp mold method is a method of manufacturing pulp mold by putting a pulp in the form of a solution mixed with an adhesive to a mixed pulp of dry dissociation of various types of waste paper by using a dry paper feeder, and then pressurizing and heating. to be.

In this case, the pressurized heat drying process is carried out in the mold, so that a high-strength thin plate member having a smooth surface can be manufactured compared to the wet type, but as described above, the mold is pressed in both directions similar to the general die casting process, so that the inside of the shoe is concave. It is difficult to apply to the product easily.

In shoes, if the upper part is divided into two or more, and the entire molding part is divided into several parts, the manufacturing process becomes very complicated, the reliability of the product is lowered, and the manufacturing cost is greatly increased.

The present invention optimizes the upper and outsole shape of the model shoe to solve the geometrical problems when applying the dry pulp mold method to the shoe molding design the upper and lower molds suitable for 2-piece molding As a result, the technical idea for producing model shoes with excellent surface quality and sophisticated and aesthetic design will be solved.

In order to solve the problems of the invention as described above, the present invention is first completed using the following main problem solving means.

First, to precisely analyze the design of traditional event and ceremonial model shoes (e.g. shoes of old rubber shoes) and to shape them into two-piece joint materials suitable for mass production and cost reduction, and to create a thick three-dimensional effect even with thin sections Use 3D CAD design.

Next, in order to reduce the cost of the model shoes and improve the quality of the surface and the three-dimensional design, a fine pulp mold suitable for high-pressure compression molding using pneumatic pressure is used as the main molding material, and a dry fine pulp molding process capable of pressurization and heat drying in the mold Use

According to the model shoe of the present invention as described above, not only has the advantages of excellent productivity and cost reduction compared to conventional cut-and-fit model shoes using paper or cloth, but also compared to the model shoes using conventional wet pulp molds. In addition, since it has excellent surface quality and design quality, it is possible to minimize the use of the adhesive because not only the adhesive bonding but also the forced fitting in some cases in the joint portion of the sole and the upper.

This improves the overall quality and aesthetics of the product and at the same time has additional effects such as excellent burning effect due to the thin material and the small amount of adhesive when the shoe is burned during the ritual process.

The model shoe of the present invention is made of pulp, but first reveals that it uses a micropulp dry molding process of compression molding and heat drying in a mold.

The main technical features of each member of the present invention is the sole (1) formed in the side cross-sectional shape of the center portion and the (front) heel end is separated from the ground; and

An upper (2) molded to have a lower side side end portion (22) having a lower side side projection shape and an upper end curved portion (23), the same as the upper side side projection shape (12) of the side cross section shape; Can be divided into

Looking at the upper (2) as the main shape features of each member, the radius of curvature (ρ) of the upper upper curved portion 23 is curved at least three times compared to the cross-sectional thickness of the upper to minimize the thin feeling of the upper And make a thick three-dimensional effect.

Next, the sole further includes an edge portion surrounding the upper side lower portion 22 of the upper, wherein the side lower end portion 22 forms an angle with a vertical line at an outer side surface 21 of the side lower portion adjacent to the edge portion θ ₁ ) Is designed such that the absolute value is about 0 ° to 5 ° and has a substantially vertical or slightly recessed shape, and an angle (θ) between the edge part of the edge part inner surface 11 adjacent to the side lower end part 22 and the vertical line. ₂ ) Also, the absolute value is around 0 ° ~ 5 ° and it is also designed to have almost vertical or slightly open shape.

In addition, the adhesive may be applied to the side surface bottom outer surface 21 and the edge portion inner surface 11, or the adhesive may be injected into the gap space therebetween.

As a result, the curved surface of the vertical angle, which is inevitably generated in the process of joining the thin plate-shaped mold member, is efficiently curved and disposed so that the incision line of the joint surface is properly received in the rim, and is further exposed to the ankle portion. By hiding the cross section of the mold member inside the shoe, the reduction of the three-dimensional effect of the product, which is the greatest weakness of the dry mold assembly member, was minimized.

In order to more specifically represent the main technical features of the present invention will be described in more detail below with reference to an example of the present invention included in the drawings.

However, in the embodiment of the invention or the specific example described below, the components including specific terms and their specific coupling structures limit the idea that is inherent in the technical features of the present invention. It is not known in advance.

The side view of Figure 1 is an exploded side view of the upper and the sole is a portion in which the blue bottom hatch side lower side 21 and the red inner hatch edge 11 is fitted to each other in the drawing.

The bonding portion may be put into the micro-gap space between the angles θ ₁ to θ ₂ , may be applied by pre-coated, but may be combined in a simple interference fit in some cases by appropriately reducing the area of the sole.

This minimized adhesive helps to rot or burn cleanly when it is later buried in the use of the product or burned during the ritual process and plays a major role in the uniformity of product quality.

Figure 2 is a three-sided view showing the shape of the sole specifically, the center portion and both ends of the sole portion can be represented by the height h of the distance away from the ground.

For example, the height of the sole in the section AA part is represented by h _{A and} is shown successively in the front sectional view on the right.

As the h height is changed, the upper incision formed at the upper end of the upper portion, which is formed close to the vertical, may be arranged in three-dimensional sense as much as possible.

Figure 3 is a three-sided view showing the shape of the upper specifically, the figure is shown as a traditional male rubber shoes. The curved shape of the lower side end portion 22 of FIG. 3 naturally corresponds to the curved shape of the upper surface of the sole of FIG. 2.

Figure 4 is a sequential cross-sectional view showing what curvature radius of the curved portion 23 formed in the upper molded in the thickness of t according to the front and rear position of the shoe. The radius of curvature (ρ) is the largest in the instep of male rubber shoes and the smallest in the heel of female rubber shoes, but overall it is molded to at least three times the thickness t (preferably 7-12 times). Make sure you have a three-dimensional appearance.

The large and gentle radius of curvature of 3 to 12 times the thickness t is hardly achievable by thick and rough molding products of the wet molding method, and as described in the name of the present invention, a relatively thin cross section compared to the wet mold. Only possible with thickness.

5 is a process chart showing a dry fine pulp molding process that is a molding process of the present invention shoe, referring to the bottom left of the drawing, the pulp is introduced into the pulp solution, and the pulp is solidified and dried by heating after pressure molding. After that, the mold is released using the gold mesh.

In this process, the high pressure and high temperature state are maintained, which results in excellent surface quality and numerical accuracy compared to the wet mold, but is molded in a relatively thin thickness.

The thin cross section and smooth surface quality combined with the structural strength of the supporting material can greatly reduce the total amount of pulp used as the material, and it burns very quickly and easily due to the thin cross section even when burning shoes. One of the combustion effects is satisfied at the same time.

6 and 7 illustrate a specific three-dimensional design example of the present invention using a CAD, mainly designed in the shape of the traditional male and female rubber shoes due to the characteristics of the product used in the ritual or ceremonial event.

While the embodiments of the present invention have been described in detail with reference to the drawings, the technical spirit of the present invention is not limited to the above embodiments.

In other words, those of ordinary skill in the art to which the present invention pertains may utilize the technical spirit contained in the specification and drawings of the present invention, and as necessary, simple modifications and simple changes that are not included in the specification and drawings of the present invention. An extended example may be further implemented, but this is also obviously included in the scope of the technical idea uniquely possessed by the present invention.

1 is an exploded side view of the upper and the sole.

Figure 2 is a three-sided view specifically showing the shape of the sole.

Figure 3 is a three-sided view specifically showing the shape of the upper.

Figure 4 is a sequential cross-sectional view showing what curvature radius of the curved portion 23 formed in the upper molded to a thickness of t according to the front and rear position of the shoe.

5 is a process chart showing a dry fine pulp molding process that is a molding process of the present invention model shoes.

6, 7 is a specific three-dimensional design example of the present invention using CAD.

* Explanation of symbols for main parts of the drawings

1: sole 11: inside border

12: Top side projection shape of the sole side cross-sectional shape

2: upper 21: outer side of the upper side

22: upper side lower part 23: curved portion

h: Distance between sole bottom and ground

θ ₁ : Angle of the lower surface of the lower side

θ ₂ : Angle of the inner surface of the edge part with the vertical line

t: product cross section thickness

ρ: bending radius of curvature

Claims (5)

delete In the model shoe of pulp material which is compression molded and heat dried in a direction perpendicular to the cross section of the material in the mold, Outsole (1) formed in the lateral cross-sectional shape (12), the middle portion and the front heel end is separated from the ground; An upper (2) formed to have a lower end side portion (22) of the lower side side projection shape and an upper end curved portion (23) at the same side as the upper side side projection shape of the side cross-sectional shape (12); It is configured to include, The radius of curvature of the curved portion 23 is a model shoe, characterized in that 3 to 12 times the size of the upper cross-sectional thickness. The method of claim 2, The sole (1) is a model shoe that further comprises; an edge portion surrounding the lower side end portion 22 of the upper (2). The method of claim 3, The angle at which the side lower end portion 22 is adjacent to the edge portion and the side lower end outer surface 21 forms a vertical line and the edge at which the edge portion inner surface 11 adjacent to the side lower end 22 is formed at a vertical line is Model shoes, characterized in that the absolute value is 0 ° ~ 5 °. The method of claim 4, wherein Model shoe, characterized in that the adhesive is put into the space between the lower side surface side 21 and the inner surface portion 11 of the rim.

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