Forming mold for shoe upper with improved forming quality using concave and convex engagement method

Abstract

The present invention suggests a forming mold for a shoe upper with improved forming quality using a concave and convex engagement method, which adopts a method of pressing and shaping both surfaces of a laminated fabric by combining a lower mold and an upper mold respectively having concave and convex portions, in order to efficiently improve the quality of the shoe upper. Thus, a desired pattern can be formed rapidly and precisely, and a shoe upper that is lighter and softer than existing shoe uppers can be manufactured.

Description

Molding mold for shoe uppers with improved molding quality utilizing an interlocking method of intaglio and relief

[0001] The present invention relates to a molding mold for a shoe upper with improved molding quality utilizing a method of interlocking intaglio and relief. More specifically, by employing a method of interlocking a lower mold and an upper mold, each having intaglio and relief formed therein, to press and mold both sides of a laminated fabric, the edges of the pattern are formed to a level close to a right angle, and an intaglio pattern is simultaneously formed on the area where the relief pattern is formed, thereby securing the lightness of the product and forming a three-dimensional structure that is differentiated from existing ones. Furthermore, the pressure applied to the press machine is controlled by a stopper formed in the upper mold, thereby maintaining uniform quality such as the thickness, shape, and hardness of the product. Additionally, by forming a plurality of fixing pins in the lower mold, a step difference between the printed layer formed on the upper and the pattern does not occur.

[0002]

[0003] Generally, various types of footwear, such as dress shoes, sneakers, and hiking boots, consist of an upper leather that forms the exterior of the shoe, an outsole that contacts the ground, a midsole installed above the outsole, and an insole that contacts the sole of the foot. The outsole, midsole, and insole thus complementarily protect the sole of the foot while ensuring a comfortable walking experience. In particular, the upper protects the instep and adds design elements to the shoe, thereby enhancing its marketability.

[0004] Accordingly, continuous efforts have been made to improve the quality and productivity of shoe uppers, but since most shoe uppers use general 2D fabrics, films, and synthetic leather, they are manufactured by assembling through multi-stage operations such as no-sewing or sewing, making the process complex and difficult to produce products with the desired level of three-dimensionality.

[0005] For example, conventional methods for producing 3D-shaped uppers include using a method of repeatedly layering printing ink to form thickness, using PU liquid resin, using PU casting to create a three-dimensional shape by injecting into a mold, or using elastic resins such as TPU by injecting into a mold and compression molding. However, due to the complex process conditions, these conventional methods exhibit poor workability and limitations in improving product quality, leading to many problems regarding their widespread application.

[0006] As prior art related to the above-described shoe upper molding method, Korean Registered Patent No. 10-1768978 comprises: a first step of manufacturing a mold including irregularities in an internal space; a second step of manufacturing a two-layer film transfer body by forming a coating layer including a printing layer and polyurethane; a third step of configuring the two-layer film transfer body fixed to the mold so as to be positioned upward; a fourth step of forming a transfer target by injecting liquid or solid thermoplastic polyurethane; and a fifth step of fixing a fabric to the transfer target and then injection molding the two-layer film transfer body, the transfer target, and the fabric by simultaneously applying pressure and heating. A method for manufacturing a shoe upper using a two-layer film is disclosed, comprising the sixth step of manufacturing a shoe by processing an injection-molded two-layer film transfer body, a transfer body, and a fabric. This has the advantage of protecting the transfer body and the fabric transferred to the shoe fabric by manufacturing the shoe while the two-layer film, on which the shoe logo and drawing are transferred, is attached to the fabric.

[0007] In addition, Korean registered patent No. 10-1098941 discloses a shoe part integrally formed on the upper by injection molding a synthetic resin using an injection molding machine, thereby injecting the shoe part integrally onto the upper in a simple manufacturing process using a seamless injection molding method, and then the upper is spread out on the lower mold of a mold and injection molded using an upper mold imprinted with a desired shape to integrally form the shoe part on the upper, and the manufacturing method thereof. The advantage of this molding method is that the manufacturing process is simple due to the seamless injection molding method, resulting in high productivity and a low defect rate, as well as the ability to simply and integrally form various shapes or complex shapes on the upper.

[0008] In addition, as prior art regarding a molding device for manufacturing a shoe upper, Korean Registered Utility Model No. 20-0244339 discloses a shoe upper molding machine in which a passage for injecting air is provided inside an upper mold that moves vertically by the operation of a cylinder, a pad having multiple holes is installed to seal the passage along the inner side, a banding device is installed behind the upper mold to band the bottom joint of the shoe upper as legs on both sides move vertically, and a stopper is provided behind the lower mold, which fixes the shoe upper and has a cooling means inside, in which a fixing plate moves back and forth by the operation of a cylinder. This has the advantage of increasing the cooling effect and allowing the shoe upper to be molded with constant and accurate dimensions at all times, and reducing the number of overall processes and improving productivity by simultaneously molding the joint of the lower part of the shoe sole.

[0009] Meanwhile, patterns such as seams, sideline decorations, side reinforcements, product or brand names, and manufacturer logos may be added to the shoe upper for visual aesthetics and product protection. The present invention proposes a technology to mold the pattern of the shoe upper into a high-quality 3D three-dimensional design, moving away from the existing inefficient method of forming 3D patterns by pressing only the upper surface of the fabric or layering printing ink multiple times. The shoe upper produced by the present invention not only has excellent visual effects but can also form a lighter and differentiated three-dimensional structure compared to existing ones.

[0010]

[0011] The objective of the present invention is to provide a molding mold for a shoe upper with improved molding quality utilizing a method of interlocking intaglio and relief, which enables the rapid and precise molding of a desired complex pattern and the manufacture of a shoe upper that is lighter and softer than existing ones by employing a method of pressurizing and molding both sides of a laminated fabric by interlocking a lower mold and an upper mold, each having intaglio and relief formed therein, in order to more efficiently improve the quality of the shoe upper.

[0012] Another objective of the present invention is to provide a molding mold for a shoe upper with improved molding quality utilizing an interlocking method of intaglio and relief, which improves the method of controlling the pressure applied to the upper and lower molds solely by the pressure of a conventional press machine, thereby setting the distance between the upper and lower molds by the thickness of a stopper formed in the upper mold and adjusting the pressure applied to the upper and lower molds in the press machine, so that a uniform upper with consistent thickness, shape, and hardness can be manufactured, and furthermore, by forming a plurality of fixing pins in the lower mold, a high-quality upper can be produced in which no step difference occurs between the printed layer formed on the upper and the pattern.

[0013]

[0014] To achieve the above objectives, the molding mold for a shoe upper with improved molding quality utilizing an interlocking method of intaglio and relief proposed in the present invention comprises a lower body (11) formed as a flat plane of a set width, an intaglio portion (12) having a plurality of grooves of a set shape corresponding to the outer shape and pattern of a laminated fabric (1) formed within a plane allowed by the lower body (11), and guide grooves (13) formed through positions adjacent to corners within the plane of the lower body (11) to guide the overlapping position of the upper mold (20), and a lower mold (10) on which a laminated fabric (1) is seated on the intaglio-formed flat plane, and an upper body (21) formed as a flat plane of a set width, a relief portion (22) having a plurality of protrusions corresponding to the intaglio portion (12) of the lower mold (10) formed within a plane allowed by the upper body (21), and protrusions formed at positions corresponding to the guide grooves (13) of the lower mold (10). A guide pin (23) is formed to be fitted into a guide groove (13) of a lower mold (10) to guide the overlapping position with the lower mold (10), and an upper mold (20) is further included that is stacked on the top of the lower mold (10) to press the upper surface of the laminated sheet (1), and a stopper (100) is assembled to the guide pin (23) formed in the upper mold (20), so that the pressure pressing the laminated sheet (1) by the upper and lower molds (10, 20) is adjusted according to the thickness of the stopper (100).

[0015]

[0016] According to the molding mold for shoe uppers with improved molding quality utilizing the interlocking method of intaglio and relief of the present invention, a laminated fabric is interposed between the lower mold and the upper mold, and by simply pressing the lower mold and the upper mold up and down, a pattern can be formed on the upper and various colors can be applied, thereby maximizing work convenience and efficiency, as well as enabling the mass production of high-quality, lightweight uppers in a short time.

[0017] In addition, unlike the conventional method of layering printing ink multiple times, the present invention allows for the precise formation of intaglio and relief on the upper by pressing the lower mold and the upper mold vertically. As a result, the edges of the upper pattern do not become dull but protrude sharply, forming an upper pattern with maximized 3D effects and clearly imparting various colors, thereby reducing the amount of printing ink used and contributing to the reduction of production costs.

[0018] In addition, the present invention improves the method of controlling the pressure applied to the upper and lower molds solely by the pressure of the existing press machine, so that the distance between the upper and lower molds is set by the thickness of the stopper inserted into the guide pin of the upper mold during the mold engagement stage, thereby controlling the pressure applied to the upper and lower molds in the press machine so that the thickness, shape, and hardness of the product are uniformly molded, minimizing the defect rate and enabling the production of a high-quality upper. Furthermore, by adjusting the thickness of the stopper while maintaining the pressure of the press machine at a constant level, it is possible to produce a high-quality upper under various molding conditions.

[0019] In addition, the present invention has the effect of enabling the realization of a desired upper shape by forming a number of fixing pins in the lower mold during the molding process of the laminated fabric, thereby firmly fixing the laminated fabric so that the printed layer and pattern formed on the upper are not misaligned or step differences occur, and the fabric is molded precisely.

[0020] In addition, since the lower mold and the upper mold of the present invention are made of aluminum or epoxy resin, they are lightweight, which reduces worker fatigue, and allows for precise molding of intaglio and relief on the mold, so the edge portion of the upper pattern does not become dull but protrudes sharply, thereby maximizing the 3D effect.

[0021]

[0022] FIG. 1 is a schematic diagram of a molding mold for a shoe upper proposed by the present invention.

[0023] FIG. 2 is an actual photograph of the lower mold proposed by the present invention.

[0024] Figure 3 is an actual photograph of the upper mold proposed by the present invention.

[0025] Figure 4 is a cross-sectional view of the pattern area of ​​a typical shoe upper.

[0026] FIG. 5 is an example photograph of a shoe upper manufactured by the molding mold of the present invention.

[0027] FIG. 6 is a cross-sectional view of the shape in which a pattern is formed on a shoe upper proposed by the present invention.

[0028] FIG. 7 is an example photograph comparing shoe uppers molded with or without the fixing pin of the present invention.

[0029]

[0030] A preferred best embodiment of the present invention is a molding mold for a shoe upper with improved molding quality utilizing an interlocking method of intaglio and relief, comprising: a lower body (11) formed flat with a set width; an intaglio portion (12) formed in the same shape at a position corresponding to the outer shape and pattern of a laminated fabric (1) within a plane allowed by the lower body (11); and a guide groove (13) formed through a position adjacent to a corner within the plane of the lower body (11) to guide the overlapping position of the upper mold (20), wherein the laminated fabric (1) is seated on a plane in which intaglio is formed; and an upper body (21) formed flat with a set width; a relief portion (22) having a plurality of protrusions formed within a plane allowed by the upper body (21) corresponding to the intaglio portion (12) of the lower mold (10); and a protruding portion formed at a position corresponding to the guide groove (13) of the lower mold (10) A molding mold for a shoe upper is proposed, comprising a guide pin (23) formed in a guide groove (13) to guide the overlapping position with the lower mold (10), and further comprising an upper mold (20) stacked on the top of the lower mold (10) to press the upper surface of the laminated sheet (1), wherein a stopper (100) is assembled to the guide pin (23) formed in the upper mold (20) so that the pressure pressing the laminated sheet (1) by the upper and lower molds (10, 20) is adjusted according to the thickness of the stopper (100).

[0031] According to a preferred embodiment of the present invention, the stopper (100) is further configured with an opening (101) that is open on one side to facilitate connection with a guide pin (23), and the lower mold (10) is formed with a plurality of fixing pins (15) to fix the laminated sheet (1) so that it does not move, and the upper mold (20) is formed with a fixing groove (25) at a position corresponding to the fixing pin (15).

[0032] In addition, the number of fixing pins (15) formed in the lower mold (10) and fixing grooves (25) formed in the upper mold (20) is configured to be within 5 to 20, and the fixing pins (15) are characterized by being in the shape of a cone.

[0033] Additionally, arch-shaped recesses (18) are formed on both sides of the lower mold (10), and the materials of the lower mold (10) and the upper mold (20) are composed of aluminum or epoxy resin to reduce manufacturing costs, provide lightweight properties, and ensure thermal conductivity during molding.

[0034]

[0035] Hereinafter, a molding mold for a shoe upper with improved molding quality utilizing an interlocking method of intaglio and relief according to the present invention will be described with reference to the attached drawings. This is intended to be an example sufficient to enable a person skilled in the art to easily practice the invention, and does not imply that the technical concept and scope of the present invention are limited thereby.

[0036] The present invention relates to a molding mold for a shoe upper with improved molding quality utilizing a method of combining intaglio and relief used to engrave patterns on the shoe upper. In this invention, by adopting a method of pressing and molding both sides of a fabric by joining an upper mold and a lower mold, each having an intaglio and relief formed therein, the edges of the pattern are formed to a level close to a right angle, resulting in excellent three-dimensional effects. Furthermore, since an intaglio pattern is simultaneously formed in the area where the relief pattern is formed, the lightness of the product can be secured. Thus, the present invention was completed by developing a molding mold for a shoe upper with improved molding quality utilizing a method of combining intaglio and relief, which maximizes convenience and efficiency of use through a three-dimensional structure differentiated from existing ones.

[0037] FIG. 1 is a schematic diagram of a molding mold for a shoe upper proposed by the present invention, FIG. 2 is an actual photograph of a lower mold proposed by the present invention, FIG. 3 is an actual photograph of an upper mold proposed by the present invention, FIG. 4 is a cross-sectional view of a pattern portion of a general shoe upper, FIG. 5 is an example photograph of a shoe upper manufactured by the molding mold of the present invention, FIG. 6 is a cross-sectional view of the shape in which the pattern of the shoe upper proposed by the present invention is formed, and FIG. 7 is an example photograph comparing shoe uppers molded with or without a fixing pin of the present invention.

[0038] As shown in FIG. 1, the molding mold for a shoe upper with improved molding quality utilizing a method of combining intaglio and relief according to the present invention is composed of a lower mold (10) and an upper mold (20), and after the upper mold (20) is joined with the laminated fabric (1) in the lower mold (10), the upper and lower molds (10, 20) are pressed to form a pattern of the laminated fabric (1).

[0039] The above laminated sheet (1) is a foam package composed of foam and textile, and the material of the foam is not only commonly used PU foam (Polyurethane foam) but also various types of foamed sheets manufactured using synthetic resin or natural resin that can be effectively used for shoe uppers. This foam package includes a printed layer coated with a screen print formed in various colors and various designs on one side.

[0040] As shown in FIG. 2, the lower mold (10) of the molding mold for the shoe upper of the present invention has an indentation formed on a flat surface that is made of a flat surface of a set width, corresponding to the shape and pattern of the product, and accommodates a laminated sheet (1) on the flat surface where the indentation is formed.

[0041] This lower mold (10) is configured to include a lower body (11) formed of a flat surface of a set width, and an intaglio portion (12) having a plurality of grooves of a set shape corresponding to the external shape and pattern of the product formed within the flat surface allowed by the lower body (11).

[0042] The lower body (11) is formed with a rectangular shape with a set thickness and is configured with a sufficiently wide width so that a laminated sheet (1) for a shoe upper can be interposed therein. Both the upper and lower sides are configured as flat surfaces so that it can be stably mounted on a press machine and easily accommodate the laminated sheet (1).

[0043] The engraved portion (12) formed on the lower body (11) is formed by arranging a plurality of grooves within the range allowed by the upper surface of the lower body (11). The shape in which the grooves are arranged is a pattern, design, brand name, logo, etc. formed on the upper of the shoe, and mainly refers to a main pattern formed in the shape of '∩' on the sides of the foot, toes, and instep area, or an upper edge formed with a certain width along the border of the main pattern, an ankle pattern, a shoelace hole pattern, etc.

[0044] The lower mold (10) is formed with a guide groove (13) that guides the overlapping position of the upper mold (20) by being formed through a position adjacent to the corner within the plane of the lower body (11). Since this guide groove (13) guides the guide pin (23) of the upper mold (20), which will be described later, to guide the stacking position so that the upper mold (20) and the lower mold (10) can be stacked in an accurate position, the guide groove (13) and the guide pin (23) are formed with corresponding diameters.

[0045] Meanwhile, as shown in FIG. 3, the upper mold (20) has a raised shape formed on a plane with a set width at a position corresponding to the recessed shape of the lower mold (10), and is stacked on the top of the lower mold (10) to press the upper surface of the laminated sheet (1).

[0046] The upper mold (20) is configured to include an upper body (21) formed of a flat surface of a set width, and a raised portion (22) having a plurality of protrusions formed within the flat surface that the upper body (21) allows, corresponding to the recessed portion (12) of the lower mold (10).

[0047] The upper body (21) is formed with a rectangular shape having a set thickness and is configured with a sufficiently generous width to uniformly press the entire surface of the laminated fabric (1) for the shoe upper. It is preferable that both the upper and lower sides of the upper body (20) be flat so that the press machine can uniformly press the entire surface of the laminated fabric (1).

[0048] The raised portion (22) formed on the upper body (21) has at least one protrusion formed within the range allowed by the bottom surface of the upper body (21). This raised portion (21) can be formed at a position corresponding one-to-one (1:1) to the recessed portion (12) of the lower mold (10), and can be formed in a size slightly smaller than the recessed portion (12) so that it can be closely fitted into each recessed portion (12).

[0049] According to a preferred embodiment of the present invention, the raised portion (22) is formed by protruding a number of very small pillars to form a cluster, i.e., a design. Here, 'design' refers to a pattern, design, brand name, logo, etc. of the shoe upper, and can be composed of an overall '∩' shaped arrangement.

[0050] In other words, the above-mentioned embossed portion (22) may be formed protruding in the shape of a square prism, and depending on the design, it may be a clustered design in which a cylinder, triangular prism, polygonal prism, cone, triangular pyramid, etc. are arranged, or it may be a single design such as stripes, text, brand logo, etc.

[0051] Meanwhile, the conventional shoe upper molding method, as illustrated in FIG. 4, was a method of partially imparting a 3D effect by applying high-frequency pressure to the upper surface of the laminated fabric (1) while the laminated fabric (1) was placed on a flat surface. However, since this molding method obtains a pattern by simply applying intaglio to the surface of the laminated fabric (1), it is not possible to obtain a raised pattern that protrudes more than the surface of the laminated fabric (1), and the three-dimensionality of the raised pattern is reduced. Furthermore, because the boundary surface between the intaglio and the raised parts is inevitably molded in a rounded shape, the clarity of the upper pattern is significantly reduced, which causes problems with the quality of the product.

[0052] In contrast, as illustrated in FIGS. 5 and 6, the present invention allows for a more distinct 3D effect because the raised portion (22) of the upper mold (20) presses the upper surface of the laminated sheet (1) and pushes it into the recessed portion (12) of the lower mold (10), thereby simultaneously forming a raised and a recessed shape at the same location on the laminated sheet. In particular, the edges of the upper pattern can be processed to a level close to a right angle, allowing for a precise and highly clear pattern to be obtained.

[0053] Therefore, the molding method using the molding mold for shoe uppers of the present invention can not only mold patterns of very fine size but also precisely mold complex and diverse designs regardless of the spacing between patterns.

[0054] The upper mold (20) is configured with a guide pin (23) that is formed protruding from a plane of a set width at a position adjacent to each corner within the plane of the upper body (21) and fitted into the guide groove (13) of the lower mold (10). The guide pin (23) is formed at a position adjacent to each corner of the upper mold (20) and is positioned on a vertical line corresponding to the guide groove (13) of the lower mold (10) when the lower mold (10) and the upper mold (20) are stacked vertically.

[0055] Since the guide pin (23) of the upper mold (20) intervenes in the guide groove (13) of the lower mold (10) and serves to guide the upper mold (20) to an overlapping position where it can be placed in the correct position of the lower mold (10), the guide groove (13) and the guide pin (23) are formed with corresponding diameters.

[0056] The guide pin (23) has its end formed sharply by tapering, so that even if the lower mold (10) and the upper mold (20) are not on an accurate vertical line, as long as the end of the guide pin (23) is positioned within the inner diameter allowed by the guide groove (13), it slides by the taper and is inserted into the guide groove (13), thereby allowing the lower mold (10) and the upper mold (20) to be stacked in the correct position.

[0057] Meanwhile, a stopper (100) is assembled to a guide pin (23) formed in the upper mold (20), and the distance between the upper and lower molds (10, 20) is set according to the thickness of the stopper (100), thereby allowing the pressure applied to the laminated sheet (1) by the upper and lower molds (10, 20) to be controlled.

[0058] As described above, the present invention improves the method of controlling pressure applied to upper and lower molds (10, 20) through only hydraulic or pneumatic devices of a conventional press machine by setting the distance between the upper and lower molds (10, 20) by the thickness of the stopper (100), thereby enabling the pressure applied to the upper and lower molds (10, 20) in the press machine to be controlled, so that the thickness, shape, and hardness of the laminated fabric (1) are uniformly formed, thereby minimizing the defect rate of the product and enabling the production of uppers with various thicknesses and hardnesses.

[0059] In addition, as the thickness and hardness of the shoe upper must necessarily vary according to the product requirements, molds of various specifications were previously prepared or the pressure or temperature of the press machine was varied, which has been a factor in increasing the defect rate of the product. In the present invention, high-quality uppers can be produced under various molding conditions by adjusting the thickness of the stopper (100) while maintaining the pressure of the press machine at a constant level.

[0060] The above stopper (100) can be produced with a standardized thickness and stacked to a desired thickness for use, but it is desirable to adjust the thickness of the stopper (100) in various ways for ease of operation. In the present invention, the thickness of the stopper (100) is formed to be within 0.5 to 2.0 mm, taking into account the molding conditions of various products.

[0061] The reason is that when the thickness of the stopper (100) is less than 0.5 mm, the pressure applied to the upper and lower molds (10, 20) through the press machine is transmitted too strongly, making it difficult to match the hardness and thickness of the upper formed into the laminated fabric (1). When the thickness of the stopper (100) exceeds 2.0 mm, the gap between the upper and lower molds (10, 20) is excessively wide, and the pressure transmitted to the laminated fabric (1) is too low, resulting in incomplete molding of the upper being manufactured or uneven shape stability.

[0062] Meanwhile, the stopper (100) is further configured with an opening (101) that is open on one side to facilitate connection with the guide pin (23), thereby allowing the stopper (100) to be firmly fixed to the guide pin (23), and furthermore, the inner diameter of the stopper (100) must be accurately matched with the outer diameter of the guide pin (23) so that it does not detach during operation.

[0063] More specifically, when the opening (101) of the stopper (100) is opened to accommodate the guide pin (23) and the opening (101) is restored to its original position, the stopper (100) is forcibly fitted onto the guide pin (23), thereby strengthening the connection with the guide pin (23).

[0064] To this end, it is preferable that the stopper (100) be made of a metal material that has a certain degree of elasticity and can withstand the temperature and pressure applied to the upper and lower molds (10, 20). This prevents the stopper (100) from detaching from the guide pin (23) during the molding process of the continuous laminated sheet (1) by firmly fixing the stopper (100) to the bottom of the guide pin (23), thereby maximizing the convenience and productivity of the worker.

[0065] Additionally, as shown in FIGS. 2 and 3, a plurality of fixing pins (15) are formed in the lower mold (10) to fix the laminated sheet (1) so that it does not move, and a fixing groove (25) is formed in the upper mold (20) at a position corresponding to the fixing pins (15).

[0066] As a result, the fixing pin (15) can firmly fix the laminated sheet (1) during the molding process of the laminated sheet (1), and to maximize this effect, it is preferable to configure the number of fixing pins (15) and fixing grooves (25) to be within 5 to 20 each, and these are formed on the entire edge portion and the central portion of the laminated sheet (1), respectively.

[0067] The fixing pin (15) formed in the lower mold (10) is in the shape of a cone, so that it can be smoothly coupled with the fixing groove (25) formed in the upper mold (20), and as a result, the laminated sheet (1) that has been molded prevents the problem of the printed layer color and design dividing line being misaligned with the actual upper product, thereby enabling the realization of a high-quality product shape.

[0068] In the present invention, as shown in FIGS. 2 and 3, 13 fixing pins (15) are formed in the lower mold (10), and 13 fixing grooves (25) are formed in the upper mold (20) at positions corresponding to the fixing pins (15).

[0069] In addition, as shown in FIGS. 1 and 2, an arch-shaped recess (18) is formed on both sides of the lower mold (10), and when the processing of the laminated sheet (1) is completed with the upper mold (20) stacked on the lower mold (10), the worker can easily separate the upper mold (20) from the lower mold (10) by gripping only the upper mold (20) through the recess (18).

[0070] Additionally, a plurality of support members (19) in the form of straight grooves are formed on the outer edge of the lower mold (10). The support members (19) serve to separate the upper mold (20) from the lower mold (10) by inducing the operation of the lever using the support members (19) as a support when the lower mold (10) and the upper mold (20) overlap each other and a lever is inserted at the location where the support members (19) are formed.

[0071] In addition, the molding mold for a shoe upper proposed by the present invention may be composed of aluminum or epoxy resin for the materials of the lower mold (10) and the upper mold (20) to reduce manufacturing costs, provide lightness, and improve thermal conductivity during product molding. Since the material has superior moldability compared to steel, the intaglio (12) and relief (22) can be precisely engraved on each mold, thereby dramatically improving the quality of the design. Furthermore, the low cost of materials can reduce the cost of manufacturing the mold, and the high lightness and thermal conductivity compared to steel allow for improved workability as well as the smooth transfer of heat and cooling provided by the press to the laminated fabric (1), thereby improving the quality and productivity of the product.

[0072] The lower mold (10) and the upper mold (20) mentioned above may be arranged in opposite directions depending on the working environment and molding conditions, and it will be obvious to a person with ordinary knowledge in the technical field to which the present invention belongs that this falls within the scope of various modifications and equivalent alternative embodiments.

[0073] The process of manufacturing a shoe upper with a high-quality 3D printed design using the molding mold for shoe uppers of the present invention is as follows.

[0074] To do this, a laminated sheet (1) must first be prepared, and this laminated sheet (1) refers to a foam package in which foam and textile are laminated together. For example, the laminated sheet (1) is composed of: a first sheet made of textile with a thickness of 0.3 to 3 mm; a second sheet made of foam with a thickness of 1 to 10 mm, laminated on the upper surface of the first sheet; a third sheet made of textile with a thickness of 0.3 to 3 mm, laminated on the upper surface of the second sheet; and a printed layer coated with a thickness of 0.02 to 2 mm on the upper surface of the third sheet.

[0075] With the prepared composite sheet (1) spread out on the upper surface of the lower mold (10), the upper mold (20) is placed over it to prepare for press molding. At this time, the guide pin (23) of the upper mold (20) is inserted into the guide groove (13) of the lower mold (10) so that the intaglio portion (12) of the lower mold (10) and the embossed portion (22) of the upper mold (20) are accurately joined.

[0076] In the molding process of the laminated fabric (1) as described above, the fixing pin (15) firmly fixes the laminated fabric (1), so that compared to the laminated fabric (1) which is molded while fixed to the lower mold (10) without the fixing pin (15), the printed layer that is printed and coated on the upper surface of the third fabric is molded without damage or distortion, thereby enabling the desired shape of the upper fabric to be realized.

[0077] This allows for a comparison of the laminated fabric formed according to the presence or absence of the fixing pin (15) in FIG. 7, where FIG. 7(a) shows the upper formed without the fixing pin (15), and FIG. 7(b) shows the upper formed by fixing it to the fixing pin (15).

[0078] That is, in the case of FIG. 7(a) where the above-mentioned fixing pin (15) is not used, a phenomenon is observed where the color of the printed layer and the design curve line of the laminated sheet (1) formed through the upper and lower molds (10, 20) do not match the thickness difference of the actual upper product, resulting in a large number of defects. On the other hand, in the case of FIG. 7(b) where the fixing pin (15) is used, the color of the printed layer and the design dividing line of the laminated sheet (1) formed through the upper and lower molds (10, 20) match the thickness difference of the actual upper product in a 1:1 ratio, so it can be seen that there is no problem at all in realizing the shape of a high-quality product.

[0079] Next, the lower mold (10) and the upper mold (20) joined together as described above are placed on a press machine, and the upper and lower surfaces are slowly pressed to form the intended shoe upper from the laminated fabric (1).

[0080] In the present invention, surface treatments such as matte, semi-gloss, and glossy finishes may be performed by a post-processing step after the molding process is completed, and the lower mold (10) and upper mold (20) may be subjected to a release coating treatment, such as Teflon coating, to improve release properties from the upper during demolding.

[0081] The molding mold for shoe uppers of the present invention, configured as described above, can form patterns on the upper and impart various colors simply by interposing a laminated fabric between the lower mold and the upper mold and pressing the lower mold and the upper mold vertically, thereby maximizing work convenience and efficiency, as well as enabling the mass production of high-quality uppers in a short time.

[0082] In addition, unlike the conventional method of layering printing ink multiple times, the present invention allows for the precise molding of intaglio and relief on the upper by pressing the lower mold and the upper mold vertically, thereby forming an upper pattern with maximized 3D effects where the edges of the pattern do not become dull but protrude sharply, and at the same time, since various colors are applied, the amount of printing ink used can be reduced, which can actively contribute to reducing production costs.

[0083] In addition, since the lower mold and upper mold of the present invention are made of aluminum or epoxy resin, the weight is light, which can reduce worker fatigue, and in addition, since intaglio and relief can be precisely formed in the mold, the edge portion of the upper pattern does not become dull but protrudes sharply, thereby maximizing the 3D effect.

[0084] In addition, the molding mold for a shoe upper of the present invention may be subjected to surface treatments such as matte, semi-gloss, or glossy finishes through a post-processing step of the lower mold and the upper mold after the molding process is completed, and a release coating treatment such as Teflon coating may be performed to improve release properties from the upper during demolding of the lower mold and the upper mold, thereby facilitating easy release between the laminated fabric and the upper and lower molds.

[0085] As described above, the molding mold for a shoe upper with improved molding quality utilizing the interlocking method of intaglio and relief of the present invention has been described exemplarily according to the embodiment illustrated in the drawings; however, it should be made clear that various modifications and equivalent alternative embodiments are possible for those skilled in the art to which the present invention pertains. Accordingly, the true technical scope of protection of the present invention is determined by the matters described in the claims, and technical ideas within an equivalent scope should be interpreted as being included within the scope of rights of the present invention.

[0086]

[0087] The molding mold for a shoe upper with improved molding quality utilizing the interlocking method of intaglio and relief according to the present invention can be applied not only to a molding mold for manufacturing shoe uppers but also to a molding mold used when manufacturing outsoles, midsoles, and insoles. In addition, the present invention can also be applied to a molding mold used when manufacturing products requiring a 3D shape.

Claims

1. A lower body (10) formed of a flat surface of a set width, an intaglio portion (12) having a plurality of grooves of a set shape corresponding to the outer shape and pattern of a product formed within a flat surface allowed by the lower body (11), and guide grooves (13) formed through each at a position adjacent to a corner within the flat surface of the lower body (20) to guide the overlapping position of the upper mold (20), and a laminated sheet (1) is seated on the flat surface where the intaglio is formed; The upper body (21) is formed as a flat plane of a set width, and a raised portion (22) has a plurality of protrusions formed within the plane allowed by the upper body (21) that correspond to the recessed portion (12) of the lower mold (10), and a guide pin (23) is formed protruding at a position corresponding to the guide groove (13) of the lower mold (10) and fitted into the guide groove (13) of the lower mold (10) to guide the overlapping position with the lower mold (10), and the upper mold (20) is stacked on the upper end of the lower mold (10) to press the upper surface of the laminated sheet (1). A molding mold for a shoe upper with improved molding quality utilizing an intaglio and relief interlocking method, characterized in that a stopper (100) is assembled to a guide pin (23) formed in the upper mold (20), and the pressure applied to the laminated fabric (1) by the upper and lower molds (10, 20) is adjusted according to the thickness of the stopper (100).

2. In Paragraph 1, A molding mold for a shoe upper with improved molding quality utilizing an intaglio and relief interlocking method, characterized in that the stopper (100) above is further configured with an opening (101) that is open on one side to facilitate connection with a guide pin (23).

3. In Paragraph 1, A molding mold for a shoe upper with improved molding quality utilizing an intaglio and relief interlocking method, characterized in that a plurality of fixing pins (15) are formed in the lower mold (10) to fix the laminated fabric (1) so that it does not move, and a fixing groove (25) is formed in the upper mold (20) at a position corresponding to the fixing pins (15).

4. In Paragraph 3, A molding mold for a shoe upper with improved molding quality utilizing an interlocking method of intaglio and relief, characterized in that the number of fixing pins (15) formed in the lower mold (10) and fixing grooves (25) formed in the upper mold (20) are each composed of 5 to 20.

5. In Paragraph 4, A molding mold for a shoe upper with improved molding quality utilizing an intaglio and relief interlocking method characterized by the above-mentioned fixing pin (15) being in the shape of a cone.

6. In Paragraph 1, A molding mold for a shoe upper with improved molding quality utilizing an intaglio and relief interlocking method, characterized in that arch-shaped recessed portions (18) are formed on both sides of the lower mold (10).

7. In Paragraph 1, A molding mold for a shoe upper with improved molding quality utilizing an intaglio and relief interlocking method, characterized in that the materials of the lower mold (10) and the upper mold (20) are composed of aluminum or epoxy resin for reducing manufacturing costs, lightness, and thermal conductivity during molding.

Images