High strength brille block and method for manufacturing thereof

Abstract

A high-strength braille block comprises: a braille block body including a block upper surface formed with a plurality of braille protrusions in a matrix shape, a block side connected to the block upper surface, and a block lower surface connected to the block side and facing the block upper surface; a thickness deviation reduction part formed concavely in a shape corresponding to the braille protrusions at a position corresponding to the braille protrusions on the block lower surface to reduce the thickness deviation in the portion where the braille protrusions are formed; an embossing pattern formed on the concave surface formed by the block lower surface and the thickness deviation reduction part; and a protrusion part that protrudes convexly from the surface during the process of discharging moisture from the braille block body to manufacture the braille block body.

Description

Technology Field

[0001] The present invention relates to a high-strength braille block and a method for manufacturing the same. Background Technology

[0002] Generally, braille blocks are defined as facilities installed to reduce the trial and error experienced by visually impaired people during walking, such as walking in a straight line, changing direction, and finding a destination, and to provide more accurate walking location and direction guidance.

[0003] Braille blocks are primarily installed in public places such as crosswalks, subway stations, and bus stops where visually impaired people need information about the shape of the sidewalk or walking routes.

[0004] The shape of the braille blocks is determined by comprehensively reviewing various factors such as the tactile sensation of the soles of the feet, the yellow (protective color) color, the touch technology of canes for the visually impaired, the relationship with general pedestrians, and urban aesthetics.

[0005] Braille blocks include dot-shaped blocks (stopping positions) with dot-shaped protrusions and line-shaped blocks (installed on pedestrian guide lines) with line-shaped protrusions.

[0006] In the past, thin tactile blocks made of cement with a thickness of 15mm or 18mm installed in indoor or underground passages were widely produced by a worker supplying cement mortar into a mold with the tactile blocks engraved on it.

[0007] As such, when workers rely on manual labor to produce tactile blocks in molds, the uncured blocks produced contain a high moisture content. During the curing process, as this moisture escapes, numerous air holes are formed within the blocks. These air holes allow rainwater to easily penetrate the blocks, which can cause the surface coating to peel off and lead to whitening.

[0008] In addition, in the method of producing tactile blocks by supplying cement mortar to a mold, moisture is not sufficiently removed from the unhardened tactile blocks, so during the hardening process of the unhardened tactile blocks, the thickness gradually decreases toward the center of the tactile blocks, causing the central rear part of the tactile blocks to become concave.

[0009] This phenomenon occurs because the volume of the cement increases as moisture evaporates and the cement hardens, pushing up the edge slope of the mold, and this is a serious disadvantage for thin cement tactile blocks with dimensions of 300×300×15mm and 300×300×x18mm.

[0010] Braille blocks manufactured with uneven thickness in this way have the problem of being easily damaged by external impact or vibration.

[0011] In addition, among conventional braille blocks, the lower surface that comes into contact with the ground is a flat surface, whereas the upper surface that comes into contact with the foot or cane of a visually impaired person is made of island-shaped protrusions or line-shaped protrusions, so the braille blocks have locally different thicknesses, and due to such thickness variation of the braille blocks, the thickness uniformity and shape uniformity of the braille blocks may be reduced during the process of curing the uncured braille blocks. Prior art literature

[0012] Registered Utility Model 20-0330837, Braille blocks for the visually impaired (Registration date: October 10, 2003) The problem to be solved

[0013] The present invention provides a high-strength tactile block and a method for manufacturing the same, wherein a fluid material (molding material) for manufacturing a tactile block is introduced into a mold, and pressure is applied to the fluid material to sufficiently squeeze the moisture contained in the fluid material and sufficiently remove moisture from the fluid material, thereby suppressing the occurrence of air holes during the curing process of an uncured tactile block (preliminary tactile block) and minimizing thickness variations in the back portion at the center and edges of the tactile block, so as to prevent breakage and damage caused by voiding phenomena in the back portion during the construction of the tactile block.

[0014] In addition, the present invention provides a high-strength braille block and a method for manufacturing the same, which prevents shape defects of the braille block and prevents the braille block from being easily damaged by external impact or vibration by artificially forming a concave groove corresponding to a braille protrusion on the lower surface of the braille block that corresponds to a braille protrusion formed on the upper surface of the braille block that comes into contact with the foot or cane of a visually impaired person, thereby suppressing or preventing thickness deviations of the braille block. means of solving the problem

[0015] As an embodiment, the high-strength braille block comprises: a braille block body including a block upper surface having a plurality of braille protrusions formed in a matrix shape, a block side connected to the block upper surface, and a block lower surface connected to the block side and facing the block upper surface; a thickness deviation reduction part formed concavely in a shape corresponding to the braille protrusions at a position corresponding to the braille protrusions on the block lower surface to reduce the thickness deviation in the portion where the braille protrusions are formed; an embossing pattern formed on the concave surface formed by the block lower surface and the thickness deviation reduction part; and a protrusion part that protrudes convexly from the surface during the process of discharging moisture from the braille block body to manufacture the braille block body.

[0016] The high-strength braille block further includes an anti-slip pattern formed on the upper surface of the block, wherein the shape of the anti-slip pattern is formed in a star shape or a square pyramid shape, different from the shape of the embossing pattern.

[0017] The braille protrusion of the high-strength braille block comprises a first inclined surface formed at an angle with respect to the upper surface of the block and a first flat surface formed at the top of the first inclined surface, and the thickness deviation reduction portion comprises a second inclined surface formed parallel to the first inclined surface by a groove formed concavely on the lower surface of the block and a second flat surface formed at the top of the second inclined surface and parallel to the first flat surface, and the protrusion portion is formed on the second flat surface.

[0018] A method for manufacturing a high-strength braille block comprises the steps of: preparing a fluid material comprising white cement, recycled aggregate, wet mortar, and moisture; placing the fluid material in a lower molding die having a protruding pattern portion protruding from the upper surface, a drain formed in the protruding pattern portion, and a mesh member covering the drain and the protrusion portion; placing an upper molding die having a braille protrusion groove portion formed on the lower surface facing the protruding pattern portion and having a shape corresponding to the protruding pattern portion; cleaning foreign substances attached to the braille protrusion groove portion; pressing the lower molding die and the upper molding die to squeeze the moisture contained in the fluid material out of the lower molding die through the embossing member and the drain, thereby forming a pre-braille block with reduced moisture between the lower molding die and the upper molding die; and separating the lower and upper molding dies and then demolding the pre-braille block from the upper molding die.

[0019] In a method for manufacturing a high-strength braille block, between the step of preparing the fluid material and the step of supplying the fluid material to the lower molding die, the method comprises: the step of supplying the fluid material to a container having a certain capacity; the step of transferring the container to the lower molding die; and the step of supplying the molding material to the lower molding die. In the step of supplying the fluid material to the container, air inside the container is removed in correspondence with the amount of fluid material input so that a certain amount of the fluid material is supplied to the container.

[0020] In a method for manufacturing a high-strength braille block, the cleaning step comprises: a step of spraying air into the braille protrusion groove to remove foreign substances remaining in the braille protrusion groove in a non-contact manner; a step of spraying a liquid release agent onto the surface of the braille protrusion groove; and a step of removing foreign substances remaining in the braille protrusion groove in a mechanical manner by scraping the surface of the braille protrusion groove with a brush and removing the release agent remaining in the braille protrusion groove in the form of droplets with the brush.

[0021] In the step of molding the moisture-reduced preliminary braille block of the method for manufacturing a high-strength braille block, a convex protrusion formed during the process of squeezing the moisture is formed on the preliminary braille block corresponding to the drain, and an embossing pattern is formed in the shape of the embossing member on the part corresponding to the embossing member.

[0022] In the step of demolding the preliminary braille block from the upper molding die of the method for manufacturing a high-strength braille block, air is supplied to the boundary between the upper molding die and the preliminary braille block to separate the preliminary braille block from the upper molding die. Effects of the invention

[0023] The high-strength braille block and the method for manufacturing the same according to the present invention have the effect of preventing breakage and damage to the braille block by suppressing the occurrence of air holes during the curing process of an uncured braille block (preliminary braille block) and minimizing thickness variations at the center of the back surface and the edges of the braille block, by introducing a fluid material (molding material) for manufacturing the braille block into a mold and then applying pressure to the fluid material to sufficiently squeeze the moisture contained in the fluid material to sufficiently remove moisture from the fluid material. Brief explanation of the drawing

[0024] FIG. 1 is an external perspective view illustrating a high-strength braille block according to an embodiment of the present invention. Figure 2 is a rear view illustrating the rear of Figure 1. Figure 3 is a cross-sectional view taken along line II' of Figure 1. Figure 4 is an enlarged view of section 'A' of Figure 3. FIG. 5 is a flowchart illustrating a method for manufacturing a high-strength braille block according to an embodiment of the present invention. Figure 6 is a flowchart specifically illustrating the step of placing a fluid material in a lower molding die. Figure 7 is a cross-sectional view conceptually illustrating the lower molding die. FIG. 8 is a cross-sectional view conceptually illustrating an upper molding die positioned on the upper part of a lower molding die. FIG. 9 is a cross-sectional view illustrating the separation of a preliminary braille block from the upper and lower molding dies. Specific details for implementing the invention

[0025] The present invention described below is capable of various modifications and may have various embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description.

[0026] However, this is not intended to limit the invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. In describing the invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the invention.

[0027] The terms used in this patent are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this patent, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0028] Additionally, terms such as "first," "second," etc., may be used to distinguish and describe various components, but said components shall not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0029] In addition, if at least two different embodiments are described in this patent, each embodiment may use all or part of its components in combination and mixed with one another without further description, as long as it does not deviate from the technical concept of the present invention.

[0030] FIG. 1 is an external perspective view illustrating a high-strength braille block according to an embodiment of the present invention. FIG. 2 is a rear view illustrating the rear of FIG. 1. FIG. 3 is a cross-sectional view cut along line II' of FIG. 1. FIG. 4 is an enlarged view of part 'A' of FIG. 3.

[0031] Referring to FIGS. 1 to 4, a high-strength braille block (100) according to one embodiment of the present invention includes a braille block body (200), a thickness deviation reduction part (300), an embossing pattern (400), and a protrusion part (500).

[0032] The braille block body (200) can be manufactured in the shape of a square plate with a size of 30 cm × 30 cm and a relatively thin thickness, for example.

[0033] A braille block body (200) having a square plate shape includes a block top surface (210), a block side surface (220), and a block bottom surface (230).

[0034] The upper surface of the block (210) is formed in a square shape with a size of 30cm × 30cm, and a plurality of braille protrusions (205) are formed on the upper surface of the block (210). The braille protrusions (205) are formed in a 6×6 matrix shape, with 36 of them formed at equal intervals on the upper surface of the block (210).

[0035] As shown in FIGS. 3 and 4, the braille protrusion (205) includes a first inclined surface (202) formed at an angle with respect to the block upper surface (210) and a first flat surface (204) formed parallel to the block upper surface (210) on the top of the first inclined surface (202). The braille protrusion (205) may be formed, for example, in a conical shape.

[0036] A non-slip protrusion may be formed on the first flat surface (204) of the braille protrusion (205) to prevent slippage. Multiple non-slip protrusions may be formed in a star shape or a square pyramid shape.

[0037] In one embodiment of the present invention, a braille protrusion (205) having a conical shape is illustrated and described, but alternatively, four braille protrusions (205) may be formed in a linear shape on the upper surface (205) of the block at equal intervals.

[0038] On the upper surface (210) of the block, an anti-slip pattern (207) is formed to prevent the foot and cane of a visually impaired person from slipping and to facilitate the drainage of moisture from the tactile block body (100) during the manufacturing process of the tactile block body (100). The anti-slip pattern (207) can be produced in various pattern shapes, and the anti-slip pattern (207) can be formed in a star shape or a square pyramid shape.

[0039] In one embodiment of the present invention, the anti-slip pattern (207) formed on the upper surface (210) of the block is formed in a constant shape, and the embossing pattern (400) formed on the lower surface (230) of the block, which will be described later, is formed in an irregular shape.

[0040] The block side (220) is formed by being erected from each of the four edges of the block top surface (210), and the block bottom surface (230) is formed on the block side (220) parallel to the block top surface (210).

[0041] A braille block body (200) having a block upper surface (210), a block side surface (220), and a block lower surface (230) can be manufactured using a molding die by forming wet mortar by mixing, for example, white cement, recycled aggregate, wet mortar, and other fluid materials.

[0042] In this way, when forming a braille block body (200) using a molding die with a fluid material, if the moisture contained in the fluid material is not sufficiently removed, a concave depression may be formed in the center of the braille block body (200) during the hardening process of the braille block body (200), or an air hole may be formed in the braille block body (200) during the moisture removal process.

[0043] In addition, if there is a large difference between the thickness of the part of the braille block body (200) where the braille protrusion (207) is formed and the thickness of the part where the braille protrusion (207) is not formed, the amount of moisture discharged from the part where the braille protrusion (207) is formed and the amount of moisture discharged from the part where the braille protrusion (207) is not formed may differ, and thus defects in the shape of the braille block body (200) may occur.

[0044] In one embodiment of the present invention, the thickness variation of the portion where the braille protrusion (205) is formed is minimized to minimize the occurrence of shape deformation of the braille block body (200), and moisture contained in the fluid material is sufficiently removed during the process of forming the braille block body (200) to prevent the formation of a depression or air hole in the braille block body (200).

[0045] In order to minimize the thickness variation of the portion where the braille protrusions (205) are formed, a thickness variation reduction portion (300) is formed on the block bottom surface (230) of the braille block body (200), and as a result of sufficiently removing moisture contained in the fluid material during the process of forming the braille block body (200), an embossing pattern (400) and a protrusion portion (500) are formed on the block bottom surface (230) of the braille block body (200).

[0046] Hereinafter, the thickness deviation reduction part (300), embossing pattern (400), and protrusion part (500) will be described with reference to the attached drawings.

[0047] Referring again to FIGS. 3 and 4, the thickness deviation reduction portion (300) is formed on the block lower surface (230) of the braille block body (200). The thickness deviation reduction portion (300) reduces the thickness in the braille protrusion (207) portion and the thickness deviation in the portion other than the braille protrusion (207).

[0048] The thickness deviation reduction portion (300) is formed in the form of a concave groove at a position corresponding to the braille protrusion (207) arranged in a matrix form on the block upper surface (210) of the braille block body (200).

[0049] For example, when a braille protrusion (207) is formed in a 6×6 matrix shape on the upper surface (210) of the block, the thickness deviation reduction part (300) is formed in a 6×6 matrix shape at a position corresponding to the braille protrusion (207) on the lower surface (230) of the block.

[0050] The thickness deviation reduction section (300) includes a second inclined surface (310) and a second flat surface (320).

[0051] The second inclined surface (310) is formed by a conical groove formed on the lower surface of the block (230), and the second inclined surface (310) is formed parallel to the first inclined surface (202).

[0052] The second flat surface (320) is formed on the top of the second inclined surface (310), and the second flat surface (320) is formed parallel to the first flat surface (204).

[0053] When the thickness deviation in the braille protrusion (207) portion and the thickness deviation in the portion other than the braille protrusion (207) are reduced by the thickness deviation reduction portion (300), the deviation in the amount of moisture discharged from the braille protrusion (207) portion and the amount of moisture discharged from the portion other than the braille protrusion (207) is reduced during the manufacturing process of the braille block body (200), so that defects such as shape defects of the braille block body (200) can be suppressed or prevented.

[0054] Referring again to FIGS. 3 and 4, the embossing pattern (400) is formed on the second inclined surface (310) and the second flat surface (320), which are concave surfaces formed by the block bottom surface (230) and the thickness deviation reduction part (300) of the braille block body (200), respectively.

[0055] In one embodiment of the present invention, the embossing pattern (400) may be formed on the block surface (230) in a regular grid shape or a net shape when viewed in a planar view.

[0056] The embossing pattern (400) is formed in the process of placing a fluid material inside a mold to manufacture a braille block body (200), and then applying pressure to the fluid material to deform the shape of the braille block body (200) and discharge moisture from the fluid material.

[0057] Even if a fluid material is placed in a mold and pressurized, it is difficult to squeeze out moisture from the fluid material because the mold and the fluid material are in close contact, preventing the formation of a path for moisture discharge.

[0058] In one embodiment of the present invention, by placing a plurality of mesh members between the mold and the fluid material, the squeezed moisture can pass through the mesh members and be smoothly drained to the outside of the mold during the process in which the fluid material is pressurized, and in this way, as the moisture squeezed from the fluid material passes through the mesh members, an embossing pattern (400) corresponding to the shape of the mesh members is formed in a raised or recessed form on the block lower surface (230) of the braille block body (200).

[0059] In one embodiment of the present invention, the embossing pattern (400) may be formed on the block bottom surface (230), the second inclined surface (310) and the second flat surface (320) forming the thickness deviation reduction portion (300), respectively.

[0060] The protrusion (500) is formed at a position corresponding to the drain of the mold where moisture passing through the mesh member is collected and discharged during the process of forming the embossing pattern (400).

[0061] For example, a drain is formed in the part that forms the thickness deviation reduction section (300) of the mold, and a mesh member is covered over the drain to prevent loss of the fluid material during the process of draining the fluid material.

[0062] Even if a mesh member is placed over the drain to prevent the loss of fluid material, fine particles of the fluid material pass through the mesh member and are drained along with the water flowing into the drain, and as a result, a protrusion (500) having a convex protrusion shape is formed in the central part of the second flat surface (320) of the thickness deviation reduction part (300) corresponding to the drain.

[0063] In one embodiment of the present invention, since there is only one drain, one protrusion (500) is formed in the center of the second flat surface (320), but otherwise, the protrusion (500) can be implemented in various ways corresponding to the shape and number of drains.

[0064] Hereinafter, a method for manufacturing a high-strength braille block will be described with reference to the attached drawings.

[0065] FIG. 5 is a flowchart illustrating a method for manufacturing a high-strength braille block according to an embodiment of the present invention.

[0066] Referring to FIGS. 1 and FIGS. 5, in order to manufacture the high-strength clay block (100) illustrated in FIG. 1, a step of preparing a fluid material that forms the high-strength clay block (100) is first performed (step S10).

[0067] The fluid material may include, for example, white cement, recycled aggregate, wet mortar, and water (or moisture).

[0068] Recycled aggregates included in the fluid material include eco-friendly building materials such as waste buildings, crushed building materials, and recycled sand, and recycled aggregates may be included in an amount of about 51% or more of the total weight of the fluid material.

[0069] Figure 6 is a flowchart specifically illustrating the step of placing a fluid material in a lower molding die.

[0070] Referring to FIG. 6, when the fluid material is prepared in step S10, a step of supplying the fluid material to a container having a specified volume (or a certain capacity) is performed (step S12). At this time, an air vent hole may be formed in the container.

[0071] If air is not removed from the container when supplying fluid material to the container, a void is formed in the container due to the air. Consequently, the fluid material supplied to the container is not supplied in the specified volume, which may result in shape defects in the braille blocks.

[0072] In order to prevent shape defects of the braille block caused by empty space in the container, when supplying fluid material to the container, air inside the container can be removed through an air vent hole in correspondence with the amount of fluid material supplied to the container, thereby ensuring that a certain amount of fluid material is supplied to the container.

[0073] When a specified volume of fluid material is supplied to the container, a step of transferring the container to the lower molding die is performed (step S14).

[0074] Figure 7 is a cross-sectional view conceptually illustrating the lower molding die.

[0075] Referring to FIGS. 5 and 7, the fluid material contained in the container is placed on the lower molding die (A) (step S20).

[0076] At this time, a protruding pattern portion (B) embossed in the form of a 6×6 matrix is ​​formed on the upper surface of the lower molding die (A), and a thickness deviation reduction portion (300) formed on the lower surface (230) of the block body (200) illustrated and described through FIGS. 3 and 4 is formed by this protruding pattern portion (B). That is, the second inclined surface (310) and the second flat portion (320) of the thickness deviation reduction portion (300) are formed by the protruding pattern portion (B).

[0077] A drain (C) is formed in the protruding pattern portion (B) of the lower molding die (A) to discharge water or moisture squeezed from the fluid material. Additionally, an embossing member (D) is disposed on the upper surface of the lower molding die (A) to cover the protruding pattern portion (B) and the drain (C) to prevent loss of the fluid material during the process of discharging water or moisture. The embossing member (D) may be formed in a shape corresponding to the shape of the protruding pattern portion (B). A fluid material having a certain volume is disposed on the upper surface of the embossing member (D) through a container.

[0078] FIG. 8 is a cross-sectional view conceptually illustrating an upper molding die positioned on the upper part of a lower molding die.

[0079] Referring to FIGS. 5 and 8, an upper molding die (E) is placed on the upper part of the lower molding die (A) (step S30). Specifically, the upper molding die (E) has a recessed groove (F) formed to form the Braille protrusion (207) described above through FIGS. 3 and 4, and the groove (F) is formed at a position corresponding to the protruding pattern part (B).

[0080] When the upper molding die (E) is placed on the upper part of the lower molding die (A), a cleaning step of the upper molding die (E) is performed (step S40).

[0081] In the step of cleaning the upper molding die (E), foreign substances attached to the groove (F) of the upper molding die (E) are removed, and a liquid release agent is applied to the groove (F) in the form of a thin film.

[0082] Specifically, the cleaning step involves spraying air into the groove (F) to remove foreign matter remaining in the groove (F) in a non-contact manner.

[0083] When the groove (F) is primarily cleaned in a non-contact manner by air, a liquid release agent is sprayed onto the surface of the groove (F). The liquid release agent allows the pre-fabricated braille block attached to the upper molding die (E) to be easily separated from the upper molding die (E).

[0084] When the liquid release agent is sprayed into the groove (F), the foreign substances remaining in the groove (F) are additionally removed mechanically / physically using a brush in an adhesive manner, and the liquid release agent remaining in the groove (F) in the form of droplets is removed so that the liquid release agent can be formed in the groove (F) in the form of a thin film.

[0085] When the cleaning of the upper molding mold (E) is finished, the upper molding mold (E) and the lower molding mold (A) are pressed together, and the fluid material is molded into a designated braille block shape between the lower molding mold (A) and the upper molding mold (E).

[0086] As the fluid material is pressurized between the lower molding mold (A) and the upper molding mold (E), moisture or water contained in the fluid material is squeezed out of the fluid material and discharged from the lower molding mold (A) by passing through the previously described embossing member (D) and drain (C), and a moisture-reduced preliminary braille block (G) is formed between the lower molding mold (A) and the upper molding mold (E). (Step S50)

[0087] FIG. 9 is a cross-sectional view illustrating the separation of a preliminary braille block from the upper and lower molding dies.

[0088] Referring to FIGS. 5 and 9, when a preliminary braille block (G) is formed, a step of separating the preliminary braille block (G) from the upper molding mold (E) is performed (step S60).

[0089] In order to separate the preliminary braille block (G), the upper molding frame (E) and the lower molding frame (A) are driven in a direction away from each other, so that the upper molding frame (E) and the lower molding frame (A) are separated from each other.

[0090] At this time, the preliminary braille block (G) is easily separated by the embossing member (B) formed on the lower molding mold (A), whereas it is not easily separated from the upper molding mold (E), and thus the preliminary braille block (G) remains attached to the upper molding mold (E).

[0091] In order to separate the preliminary braille block (G) from the upper molding mold (E), air is supplied to the boundary between the upper molding mold (E) and the preliminary braille block (G) through the air supply unit (H) as shown in FIG. 8, so that the preliminary braille block (G) is separated from the upper molding mold (E) by the air.

[0092] The pre-fabricated braille block (G) separated from the upper molding mold (E) is dried and painted to manufacture a high-strength braille block.

[0093] As explained in detail above, after introducing a fluid material (molding material) for manufacturing a braille block into a mold, pressure is applied to the fluid material to sufficiently squeeze out the moisture contained in the fluid material and sufficiently remove moisture from the fluid material, thereby suppressing the occurrence of air holes during the curing process of the uncured braille block (preliminary braille block) and minimizing thickness variations in the center and edges of the braille block, thereby preventing breakage and damage to the braille block.

[0094] Meanwhile, the embodiments disclosed in this drawing are merely specific examples provided to aid understanding and are not intended to limit the scope of the invention. It is obvious to those skilled in the art that other variations based on the technical concept of the invention are possible in addition to the embodiments disclosed herein. Explanation of the symbols

[0095] 100...High-strength tactile block 200...Tactile block body 300...Thickness deviation reduction section 400...Embossing pattern 500...protrusion

Claims

Claim 1 delete Claim 2 delete Claim 3 delete Claim 4 A step of preparing a fluid material comprising white cement, recycled aggregate, wet mortar, and moisture; a step of preparing a lower molding die comprising a protruding pattern portion protruding from the upper surface and arranged in a 6×6 matrix form, and a drain formed in the protruding pattern portion; a step of placing an embossing member on the lower molding die that covers the upper surface, the protruding pattern portion, and the drain, and is in close contact with the upper surface of the lower molding die in a shape corresponding to the protruding pattern portion, allowing the moisture to pass through; a step of supplying the fluid material to a container having a specified volume and having an air vent hole formed therein; a step of supplying the fluid material of a specified volume to the container by discharging residual air inside the container to the outside through the air vent hole in correspondence with the amount of fluid material introduced into the container, thereby preventing the formation of an empty space caused by air inside the container; a step of transferring the container to the lower molding die; a step of supplying the molding material to the lower molding die; and an upper molding die having a braille protrusion groove portion formed on the lower surface facing the protruding pattern portion, having a shape corresponding to the protruding pattern portion. A step of placement; a step of cleaning foreign substances attached to the groove of the braille protrusion; a step of pressurizing the lower molding die and the upper molding die to squeeze the moisture contained in the fluid material out of the lower molding die through the embossing member and the drain, thereby forming a preliminary braille block with reduced moisture between the lower molding die and the upper molding die;A method for manufacturing a high-strength braille block, comprising the step of separating the lower and upper molding molds and then demolding the preliminary braille block from the upper molding mold; wherein, in the step of molding the preliminary braille block, the moisture is squeezed to form a protrusion on the preliminary braille block corresponding to the drain hole, and in the step of molding the preliminary braille block, as the moisture contained in the fluid material is discharged through the drain hole, an embossing pattern formed as either a grid shape or a net shape by the embossing member is formed on the concave thickness deviation reduction portion formed on the lower surface of the preliminary braille block by the protruding pattern portion. Claim 5 delete Claim 6 A method for manufacturing a high-strength braille block according to claim 4, wherein the cleaning step comprises: a step of spraying air into the braille protrusion groove to remove foreign substances remaining in the braille protrusion groove in a non-contact manner; a step of spraying a liquid release agent onto the surface of the braille protrusion groove; and a step of scraping the surface of the braille protrusion groove with a brush to remove foreign substances remaining in the braille protrusion groove in a mechanical manner and maintaining the release agent remaining in the braille protrusion groove in the form of droplets with the brush in a thin film form. Claim 7 delete Claim 8 A method for manufacturing a high-strength braille block according to claim 4, wherein, in the step of demolding the preliminary braille block from the upper molding die, air is supplied to the boundary between the upper molding die and the preliminary braille block to separate the preliminary braille block from the upper molding die.

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