KR101818648B1 - Manufacturing method for pottery decorated with pattern of hemp and pottery manufactured by same method - Google Patents

Abstract

One embodiment of the present invention includes a first step of obtaining a three-dimensional digital pattern having a shape in which a string of beads and a string of beads intersect with each other through three-dimensional scanning, a method of producing a gypsum mold having a shape corresponding to the obtained pattern, A second step, a third step of pouring the base composition into the gypsum mold and pressing the base composition into a desired shape, a fourth step of demolding the base material from the gypsum mold, a fifth step of firstly firing the demolded base, A sixth step of applying a glaze to the substrate having been baked, and a seventh step of secondly baking the substrate coated with the glaze, wherein the grain size is 200 to 300 M can be made to have a feature of embossing fine-grained rust on the surface of ceramics by compression-molding a base composition using a raw material controlled to have a specific gravity of 10 탆 and using a gypsum mold having a wet pressing strength of 320 kgf / cm ² or more.

Description

Technical Field [0001] The present invention relates to a method for manufacturing ceramics having a surface embossed with a grain and a pottery produced by the method.

More particularly, the present invention relates to a method for manufacturing ceramics having a surface of a hemp, which is a traditional pattern on a surface, and more particularly, The present invention relates to a method of manufacturing a ceramic material having fine and fine texture on a surface thereof by pressing and molding a substrate composition using the same and a ceramic produced by the method.

Ceramics refers to a product which is obtained by mixing raw materials such as clay, feldspar, and silica at a certain ratio, molding the mixture into a desired shape, and firing the mixture in a kiln at a high temperature, and can be used for decorative purposes because of its excellent artistic value , And it is mainly used as a living pottery such as a tableware tool.

 With the recent improvement in living standards, consumers are choosing products that emphasize not only the practicality of ceramic kitchen utensils but also aesthetic factors. In order to meet this trend, ceramic manufacturers have applied various design techniques to produce ceramic kitchen utensils with practicality and aesthetics at the same time. Development and release.

The technique of decorating the surface of ceramics in the prior art is known as a method in which various patterns are manually drawn or embossed on the surface of an unglazed pottery, or a method of embedding the engraved area with other colors and / or other materials is known In order to easily decorate the surface using various colors, there has been developed and used a method of attaching a transfer paper to a surface of an unglazed pottery using a transfer paper printed with a pattern, and coating the surface.

However, it is a very difficult operation to decorate the surface of the ceramics which is damaged and deformed by the impact by the above-mentioned technique, and it has a disadvantage that mass production is difficult. Even if the transfer coating method which is relatively easy to mass-produce is used, the work of attaching the transfer paper to the surface of the porcelain having the curved surface is performed by hand, and it is difficult to express the three-dimensional shape.

Korean Patent No. 10-1136650 (the name of the invention: a method for manufacturing ceramics ornaments and porcelain ornaments manufactured therefrom, hereinafter referred to as "Prior Art 1") carries a circular shape on the surface of a material, Leaving the hardened silicone mold at a room temperature for one day and then removing the hardened silicone mold from the circle to obtain a finished silicone mold; mixing the water, the base and the dispersant to produce a slip in the fluidized state; A method for manufacturing a ceramic ornamental article comprising the steps of applying and freezing a car, demolding the substrate from the silicon mold with the frozen substrate, and naturally drying and firing the demolded substrate.

KR 10-1136650

The prior art 1 discloses a method of manufacturing a porcelain ornamental by sculpting a circular shape on the surface of a material, applying a slip on a silicone mold poured by pouring the silicon liquid, and performing refrigeration molding. However, It is difficult to fabricate a large-sized ceramic product because it is required to manually cut a circular shape every time the design is changed.

Therefore, the object of the present invention is to realize a delicate pattern which is difficult to be hand-made by hand, on the surface of a ceramics by utilizing a digital designing technique. In addition, the present invention provides a method of manufacturing ceramics which is easy to mass-produce by applying a digital design technique to the manufacture of ceramics, realizing the nature-friendly and detailed texture of the burls on the surface of the ceramics and applying the compression molding method.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.

According to an aspect of the present invention, there is provided a method of manufacturing a ceramic material having a surface embossed with a flake.

According to an embodiment of the present invention, a method of fabricating a ceramic having a surface embossed with a flock is a first step of acquiring a three-dimensional digital pattern having a shape in which a string of embroidery is crossed by a three- A second step of preparing a gypsum mold having a shape corresponding to a pattern obtained in the second step, a third step of injecting the composition into the gypsum mold produced in the second step and pressing the same, A fourth step of demolding the substrate from the gypsum mold, a fifth step of firstly firing the base material deformed in the fourth step, a sixth step of applying glazing to the base material in which the first firing is completed, includes a seventh step of the secondary sintering the applied carry, and to particle size using a composition possessing a wet compression strength of 320kgf / cm ² or more plaster mold using a control material to 200 to 300㎛ hameu presses It is possible to realize a fine embossed texture on the surface of the ceramics.

In an embodiment of the invention, the base composition in the third step comprises i) 25 to 45 wt% of clay, 25 to 40 wt% of feldspar, 5 to 40 wt% of zircon, 5 to 40 wt% of hard material, and CaCO ₃ , MgCO ₃ Ii) controlling the particle size to 200 to 300 mu m by pulverizing the mixture from step i), iii) adding the solvent and / or the solvent to the milled mixture in step ii) And adding an organic binder.

In the embodiment of the present invention, the organic binder in step iii) may include one or more selected from the group consisting of polyethylene glycol (PEG), polyvinyl alcohol (PVA), and polyacrylic acid (PAA).

In an embodiment of the present invention, the primary firing of the substrate may be performed at 800 to 900 占 폚 for 9 to 10 hours.

In an embodiment of the invention, the glaze may comprise 30 to 40 wt% of feldspar, 20 to 30 wt% of limestone, 20 to 30 wt% of glass frit, 5 to 10 wt% of clay and 5 to 10 wt% of silica.

In an embodiment of the present invention, secondary firing can be performed at 1250 to 1280 占 폚 for 12 to 14 hours.

In an embodiment of the present invention, it is possible to further include the step of carving and coloring the substrate where the first firing is completed between the fifth step and the sixth step.

According to an embodiment of the present invention, since a ceramic material is manufactured by a method of pressing and molding a substrate composition on a gypsum mold manufactured by utilizing a digital designing technique, a detailed texture that can not be easily hand- , The second effect that contributes to the improvement of the aesthetics of the ceramic product, and the third effect that the mass production is easy.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

FIG. 1 is an actual photograph of a pottery having a surface embossed on a surface manufactured according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings and specific examples. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Throughout the specification, when a part is referred to as being "connected" (connected, connected, coupled) with another part, it is not only the case where it is "directly connected" "Is included. Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The present invention relates to a method for embodying a fine texture such as a result of a hemp on a surface of a ceramic product by combining a digital design technique with a ceramics manufacturing process. In order to realize such a fine texture, And a gypsum mold having the obtained pattern formed on the inside thereof is manufactured, and the ceramics is manufactured by press molding the ceramic base with the above gypsum mold.

In one embodiment of the present invention, a ceramics having a surface embossed on a surface is obtained by a first step of obtaining a three-dimensional digital pattern having a shape in which a string of beads and a raw string intersect with each other through three-dimensional scanning, A second step of preparing a gypsum mold having a shape corresponding to the shape of the gypsum mold formed on the inner wall of the gypsum mold, a third step of pouring the foundation composition into the gypsum mold produced in the second step, A fourth step of demolding, a fifth step of firstly firing the demolded substrate in the fourth step, a sixth step of applying glazing to the substrate where the first firing is completed, and a seventh step of firing the substrate to which the glaze is applied, , ≪ / RTI > Hereinafter, the present invention will be described in detail in the above-described manner in each of the steps.

The first step of the present invention is a step of acquiring the texture of the burr through a three-dimensional laser scanning as a three-dimensional digital image. The hemp cloth is a very detailed cross shape of the hemp and hemp, and the microstructure of the hemp hemp can be acquired as a digital pattern through the 3D laser scanning.

The second step of the present invention is a step of producing a gypsum mold in which a shape corresponding to the pattern obtained in the first step is formed on the inner wall. Specifically, a circular pattern is formed on the inner side of the digital pattern obtained by laser scanning. After applying the gypsum dough, the gypsum mold is formed by solidifying the inside of the gypsum mold. The present invention relates to a method for producing a ceramic by press molding, and a gypsum mold is to be fabricated so that the texture of the three-dimensional and fine knitted fabrics can be easily realized on the surface of the ceramics while having physical properties suitable for the compression molding method. In one embodiment of the present invention, the gypsum mold comprises 50 wt% or more of calcined gypsum, and has a wet compression strength of 320 kgf / cm ² or more by incorporating a metal or polymer resin structure. Since the gypsum mold according to the present invention has a wet compressive strength of high strength as described above, it can be used to compact and solidify the base material, thereby realizing fine and three-dimensional kneading. Further, it is noted that the gypsum mold may be made into several pieces to facilitate demoulding of the substrate in a step to be described later.

The third step of the present invention is a step of preparing the substrate in a desired form by injecting the substrate composition into the prepared gypsum mold and pressing the same. In a third step of the present invention, the base composition comprises i) an alkaline earth material 5 comprising 25 to 45 wt% of clay, 25 to 40 wt% of feldspar, 5 to 40 wt% of zircon, 5 to 40 wt% of hard material, and CaCO ₃ , MgCO ₃ To 15 wt%, ii) pulverizing the mixture from step i) to control the particle size to 200 to 300 mu m, iii) adding a solvent and an organic binder to the mixture which has been pulverized in step ii) Step < / RTI > In addition, the organic binder in step iii) of the present invention may include at least one selected from high-plasticity polyethylene glycol (PEG), polyvinyl alcohol (PVA), and polyacrylic acid (PAA). Also, by controlling the particle size of the raw material component to 200 to 300 占 퐉, the substrate composition according to the present invention can easily realize fine and three-dimensional flame-like texture. In addition, in order to realize the fine and elaborate texture of the burlap on the surface of the substrate, a pressure greater than a certain value should be applied within the mechanical tolerance of the gypsum mold. In addition, since the gypsum mold absorbs a large amount of water during the compression molding process, it may be preferable to reuse after drying at 20 to 60 캜 for 2 hours or more for reuse.

The fourth step of the present invention is a step of demolding the substrate from the gypsum mold. The method of demolding the substrate is well known in the art. In the case where the gypsum mold is manufactured into several pieces in the second step, it is obvious that the substrate can be demoulded by decomposing the gypsum mold, and the demoulding can be performed with the ejector. Further, in one embodiment of the present invention, the step of drying the substrate may be further performed between the fourth step and the fifth step at a temperature of 20 to 80 캜.

The fifth step of the present invention is a step of first firing the substrate. In one embodiment of the present invention, the first firing of the substrate may be performed at 800 to 900 ° C for 9 to 10 hours to facilitate the later-described glaze application step by firing the substrate to increase hardness. In addition, after the fifth step, it is possible to further improve the aesthetics by further including a step of carving and coloring the substrate having undergone the first firing.

The sixth step of the present invention is a step of applying the glaze to the substrate where the first firing is completed. In one embodiment of the invention, the glaze may be made up to contain 30 to 40 wt% feldspar, 20 to 30 wt% limestone, 20 to 30 wt% glass frit, 5 to 10 wt% clay and 5 to 10 wt% It is applied thinly on the surface of the substrate where the first firing is completed, thereby improving the glossiness. The method of applying the glaze is well known in the art and can be carried out by one method selected from various glaze application methods such as quenching and spray coating. In addition, the glaze according to the present invention has an advantage that scratches on the surface can be minimized while improving the gloss of the ceramics, while being excellent in abrasion resistance.

The seventh step of the present invention is a step of secondary firing the substrate coated with the glaze. In one embodiment of the present invention, the secondary firing can be performed at 1250 to 1280 캜 for 12 to 14 hours.

FIG. 1 is an actual photograph of a ceramic having a surface embossed on a surface thereof manufactured according to an embodiment of the present invention. Hereinafter, a physical property test result of a ceramic produced according to an embodiment will be described.

[Possession of Bending strength  Measure]

In order to evaluate the strength of the substrate, the bending strength test of the substrate was carried out according to the KS L1591 standard. The specimens were prepared with dimensions of 36 mm (length) X 4.0 mm (width) X 3.0 (thickness), and then three-point bending strength was measured using an Instron machine.

[Evaluation of Translucency of Glaze]

The transmittance of the glaze was measured using a spectrophotometer, and the transmittance was 70 (reference value 100).

[Hazardous substance release test]

Lead and cadmium dissolution tests were carried out in accordance with KS L1204 standard to evaluate whether or not harmful substances were released from glazed pottery. As a result of the test, the content of lead and cadmium was found to be appropriate values of 2 ppm and less than 0.5 ppm, respectively.

[Pattern of Implementability ]

In order to evaluate whether the fine patterns such as the result of the embossing can be implemented well on the surface of the ceramics by the manufacturing method according to the present invention, the patterns of the ceramics fabricated are scanned in three dimensions and data are obtained. The degree of similarity was compared and the embodied pattern was measured quantitatively. Quantitative measurements of similarity were calculated using Delcam's Powershape 2015 CAD software. As a result of the calculation, it was confirmed that the emblem of the pattern was 80%.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

Claims (8)

A method for producing a ceramic having a surface embossed texture,
A first step of acquiring a three-dimensional digital pattern having a shape in which a string of beads and a string of beads intersect with each other through three-dimensional scanning;
A second step of fabricating a gypsum mold having a shape corresponding to the pattern obtained in the first step on the inner wall;
A third step of injecting a base composition into the gypsum mold produced in the second step and pressing the base composition to produce a desired form;
A fourth step of demolding the substrate from the gypsum mold;
A fifth step of firstly firing the substrate having been demolded in the fourth step;
A sixth step of applying a glaze to the substrate where the first firing is completed;
A seventh step of secondary firing the substrate coated with the glaze in the sixth step; Lt; / RTI >
By particle size is used to hold the wet composition used to control the raw material to 200 to 300㎛ compression strength of at least 320kgf / cm ² plaster mold compression molding and characterized in that it implements the result of a fine hemp cloth on the surface of the ceramic,
Wherein the gypsum mold has a wet compressive strength of 320 kgf / cm ² or more by incorporating 50 wt% or more of calcined gypsum and incorporating a metal or polymer resin structure.
The method according to claim 1,
In the third step,
i) blending 25 to 45 wt% of clay, 25 to 40 wt% of feldspar, 5 to 40 wt% of zircon, 5 to 40 wt% of hard material, and 5 to 15 wt% of alkaline earth material comprising CaCO ₃ , MgCO ₃ ;
ii) pulverizing the mixture from step i) to control the particle size to 200 to 300 mu m;
iii) adding a solvent and an organic binder to the mixture which has been pulverized in the step ii);
The method of claim 1 or 2,
The method of claim 2,
Wherein the organic binder in step iii) comprises one or more selected from the group consisting of polyethylene glycol (PEG), polyvinyl alcohol (PVA), and polyacrylic acid (PAA). Of manufacturing ceramics.
The method according to claim 1,
Wherein the first firing is performed at 800 to 900 DEG C for 9 to 10 hours.
The method according to claim 1,
Wherein the glaze in the sixth step comprises 30 to 40 wt% of feldspar, 20 to 30 wt% of limestone, 20 to 30 wt% of glass frit, 5 to 10 wt% of clay and 5 to 10 wt% A method for manufacturing ceramics in which the texture of the embers is embodied.
The method according to claim 1,
Wherein the secondary firing is performed at 1250 to 1280 캜 for 12 to 14 hours.
The method according to claim 1,
Further comprising the step of sculpting and coloring the substrate having undergone the first firing step between the fifth step and the sixth step.
A ceramics in which the surface of the fabric produced by the manufacturing method according to claim 1 is embossed with a fillet.

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