KR20050066134A - Method for fabricating ceramic ware with cubic design applying inlaid work - Google Patents

Abstract

The present invention relates to a living magnet having a three-dimensional design and a method of manufacturing the same, and an object thereof is to provide a living magnetic and a method of manufacturing the same in which a three-dimensional design is formed on the surface of the living magnetic by an automated process. In order to achieve the above object, in the method of manufacturing a living magnetic material having a three-dimensional design pattern formed on a surface, preparing a plurality of holding slips having different colors, and performing a plurality of slip castings with each holding slip continuously. Thereby forming a multi-layer molded body, first drying the molded body, removing a part including the surface of the molded body so that an inner layer is exposed to the outside, and forming a design pattern; Drying and heat treatment.

Description

Living magnetic having a three-dimensional design applying the inlaid method and its manufacturing method {METHOD FOR FABRICATING CERAMIC WARE WITH CUBIC DESIGN APPLYING INLAID WORK}

The present invention relates to a living magnet having a three-dimensional design and a method of manufacturing the same, in particular embossed and / or engraved on the surface of the multi-layer molded body obtained by sequentially casting two or more substrates of different colors by applying the molding process by slip casting It relates to a living magnetic having a three-dimensional design formed a design pattern of and a manufacturing method thereof.

Typically, a flat or three-dimensional design is formed on the surface of the living magnet to enhance the aesthetic sense of the living magnet. Conventionally, in order to form a flat design pattern on a living magnet, a transfer paper having a desired design pattern is attached to a surface of the living magnetic having completed primary and secondary firings, and further heat treatment is performed. In such a case, a change in design could not be obtained except by changing the content or color of the design pattern. In addition, in the case of the transfer paper, it is difficult to derive various changes in the design because there is no choice but to use a uniform picture already designed. In addition, the operation of attaching the transfer paper to the surface of the living magnetic is difficult to automate, and proceeds by hand, and after attaching the transfer paper requires additional heat treatment for fixing the transfer paper, the work process becomes longer and the production cost increases.

On the other hand, in order to form a three-dimensional design pattern on the surface of the living porcelain, a product having a three-dimensional effect on the surface is manufactured by bonding the same kind of substrate to the surface of the living magnet before firing in various patterns and applying color to the baking. In addition, as another technique for forming a three-dimensional design pattern on the surface of the living magnetic inlay engraved with a carving knife, etc. on the surface of the living magnetic before firing, and then inlaid method of filling the material of a different color in the resulting groove is used have. However, even in this case, since the work of bonding the same kind of material to the surface of the living magnetic material or filling the material of different colors into the grooves formed on the surface of the living magnetic material is usually performed by manual labor, manufacturing cost is high and mass production by automation Not only is it impossible, but the surface of the body filled in the groove is difficult to be smoothed.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem, and to provide a living magnet and a method of manufacturing the same, which can be mass-produced by an automated process and a three-dimensional design is formed on a surface thereof.

Another object of the present invention is to produce a multi-layer molded body consisting of two or more substrates by applying a slip casting process, and then apply a damascene method to the surface of the molded body to form a three-dimensional pattern to give a new three-dimensional design life magnetic and its manufacturing method To provide.

Another object of the present invention is to form a three-dimensional design pattern on a smooth surface by forming a groove on the surface of the multi-layer molded body by an automated process or by removing a part of the protruding surface to expose a lower layer having a different color, and It is to provide a manufacturing method.

In the manufacture of multi-layer molded products by slip casting process, the focus should be on the control of casting speed, slip properties, and establishment of drying conditions so that sufficient bonding strength and mutual mixing between two or three different materials do not occur. In the case of simultaneous firing of molded bodies, the focus is on the shrinkage rate that occurs during the sintering of the bodies, the establishment of firing conditions for perfect bonding, and the removal of warping and pinholes. Since the degree of thermal expansion of the base can be changed by mixing the pigment to show the color, the focus is also on the addition of the second phase and the thickness control between the layers in order to match the change in shrinkage between the bases.

One aspect of the present invention for achieving the above object of the present invention is a method of manufacturing a household magnetic, comprising the steps of preparing a plurality of holding slips having different colors, and performing a plurality of slip casting with each holding slip Thereby forming a multi-layer molded body, first drying the molded body, removing a part including the surface of the molded body so that a part of the inner layer is exposed to the outside to form a design pattern, and forming the molded body. Secondary drying and heat treatment, and in the forming of the multilayer molded body, a plurality of slip castings are continuously performed without a drying process.

Preparing the holding slip may include aging the holding slip for 72 hours or more. The forming of the design pattern may include rotating the molded body and advancing and cutting the cutting tool on the surface of the rotating molded body. The specific gravity ratio of the base slip continuously slip casted is preferably in the range of 1.00 to 1.05. The holding slip may include a primary holding slip having a specific gravity of 1.81 and a secondary holding slip having a specific gravity of 1.83. At least some layers of the layers constituting the molded body may include protrusions, and the forming of the design pattern may include cutting at least a portion of the protrusions formed on the surface of the molded body. The thickness ratio of the innermost layer of the molded body to the thickness of any other layer is preferably 10: 3 to 10: 1. The step of primary drying the molded body may include a step of drying for 6 hours at room temperature. The holding slip is preferably used in the 0.15 to 0.3wt% 44CF 50% sol peptizer.

Another aspect of the invention relates to a living magnet produced by the method described above.

Example 1

In this embodiment, the multi-layer molded body is formed by continuous slip casting, and then the intaglio is formed on the surface of the molded body, or the multilayer molded body is formed so that the protrusion is formed, and then the protrusion of the molded body is cut. An example of forming on the surface of porcelain is proposed. In the formation of such multilayer molded bodies, the increase in the bonding force between two or more substrates having different colors and the prevention of warpage and the removal of pinholes generated during the firing of the multilayer molded bodies are the most important factors. Therefore, the selection of the holding slip to be used in the production of the living self according to the present embodiment should be preceded. First, the base material used for the multilayer molding includes a base material used for ordinary life magnetism production, and a color paper obtained by adding a pigment thereto to have a desired color.

Two peptising agents, 44CF 50% sol and sodium silicate 50% sol, were used for dispersibility testing of the base (usually white) to be used for slip casting. The moisture content was fixed to 30% of the soil to be used in the manufacturing site, and the viscosity was measured according to the amount of each peptizer at 26 degrees Celsius to obtain the following results.

Table 1. Viscosity Variation of Slip with Addition of 44CF 50% Sol Peptizer

Table 2. Viscosity change of slip according to the amount of sodium silicate 50% sol peptide added

It can be seen from the experimental results that the viscosity change appears depending on the amount of the peptizer added. In this example, 0.25 wt% of 44CF 50% sol peptide, which has excellent peptizing properties and slowly changes in viscosity, is used for both base and coloring paper.

Next, the pigment content was mixed in the base material at a ratio of about 340: 1 wt%, and the zeta potential was measured according to the amount of dispersant added to the dyeing paper having a desired color. At this time, the water content of the body was 29% and the zeta potential of the slip was measured according to the 44CF 50% sol peptide addition amount under the conditions of pH 5.9 to obtain the following results.

Table 3. Zeta Potential of Stain Paper Slip with Addition of 44CF 50% Sol Peptizer

In general, the larger the value of the zeta dislocation of the base slip, the better the dispersibility of the slip is, which is suitable for casting, and the maximum value of the zeta dislocation appears when 0.25 wt% of 44CF 50% sol peptizer is added to the color paper. Therefore, the specific gravity increases when pigment is added to the base material (see the following test results), but similar to the base material slip, the slippage of the color paper 44CF 50% sol peptide for slip casting It is excellent as a holding slip.

Next, by changing the moisture content of the pigmented paper mixed with the pigment content of the base material in a ratio of about 340: 1 wt%, the specific gravity of the slip was measured to obtain the following results.

Table 4. Measurement of specific gravity of color paper according to moisture content

The specific gravity of the base material having a moisture content of 29% was 1.81, which is increased by 1.83 due to the addition of pigment, indicating that the increase is not large.

In the multi-layer slip casting process where the dye paper is used for the first slip casting and the base material is used for the second slip casting, in the continuous casting process of the primary dye paper and the secondary base material, the specific gravity ratio of each slip ( Casting results according to the ratio of specific gravity) are summarized in Table 5 below. The optimum casting conditions were measured by varying the ratio of specific gravity of primary color paper slip and specific gravity of secondary base material slip. The multi-layered molded articles made of the dye paper slip and the base material slip having various specific gravity ratios were dried, and then heat-treated to measure the final state of the degree of warpage and peeling and the number of pinholes per unit area. The degree of warpage and fall was visually observed and judged to be good when no warpage and fall were not present and bad when any of warpage and fall were observed. The presence of pinholes was determined by the number of pinholes per unit area.

Table 5. State of Sintered Multi-Layered Compacts According to Specific Gravity Ratio of Two Slips

From this, the specific gravity ratio between the primary slip ratio and the secondary slip specific gravity is 1.03, and the number of generated pinholes is the smallest.

In the production of monolayer molded bodies, the slips usually enter a slip casting operation at room temperature, usually after a aging time of about one day. However, in order to confirm how much aging time is required when manufacturing a multilayer molded body as in the present invention, whether or not pinholes were generated in the final product according to the aging time of the slip was measured. All conditions were performed similarly except the aging time of slip.

Table 6. Pinhole Generation Results According to Aging Time of Slip

As expected, the holding slip was confirmed to decrease the number of pinholes generated as the maturation time increased.

Finally, the successive pin casting of the primary slip and the secondary base slip were investigated. The thickness was controlled by varying the casting time, and all other conditions were performed the same.

Table 7. Pinhole Generation Results According to Casting Thickness Ratio

The thickness ratio of the primary casting and the secondary casting showed the least occurrence of pinholes at 0.3 to 0.1. However, it can be seen that this does not have a significant effect on the generation of pinholes compared to the ripening time of the slip and the specific gravity ratio between the slips. On the other hand, if the intaglio is formed on the surface of the multi-layered molded body formed after slip casting, the secondary cast body is exposed based on the primary cast body by the grooves formed therefrom. It also depends on the thickness ratio of the primary casting and the secondary casting. Considering this point, the thickness ratio of the primary casting and the secondary casting may be determined at 0.3 to 0.1 (that is, 3:10 to 1:10), preferably 0.3. Considering this point in the manufacture of multi-layered molded articles having three or more layers, that is, the innermost layer, which is the innermost layer, considering the design represented by the inner layer exposed during the intaglio formation on the molded body's surface while minimizing the occurrence of pinholes. The thickness of is to be the thickest and the remaining layers can be of the same thickness or in an appropriate proportion, taking into account the design exposed during the formation of the intaglio. For example, for three layers the thickness of the primary, secondary and tertiary castings can be approximately 3: 3: 10.

Based on the experimental results as described above, the primary dye paper slip and the secondary base slip suitable for multilayer molding have a water content of 27 to 31%, preferably 29%, and 44CF 50% sol peptizer from 0.15 to 0.3 wt%, preferably 0.25 wt% is used, the aging time is prepared by 72 hours or more. Normally, color paper slip is prepared by adding a pigment at a wt% ratio of about 340: 1 to the base slip. In addition, the pH of the primary color paper slip and the secondary base material slip are approximately 5.8 to 6.1. The specific gravity of the primary color paper slip and the secondary base material slip are about 1.83 and about 1.81, respectively, values of about 1.8 used in the conventional slip casting. In this case, an important factor in forming a multilayer by continuous slip casting is the specific gravity ratio between the two slips. In order to optimally adjust the specific gravity ratio between these two slips, on the basis of the data obtained through the above-described tests, the type and amount of the peptizing agent as well as the moisture content of the base or color paper, especially the color paper are adjusted. The preferred specific gravity ratio between the primary pigmented paper slip and the secondary base material slip is approximately 1.00 to 1.05, preferably 1.03, as described in connection with Table 5. In slip casting, the slip forms a certain thickness because the mold absorbs the water in the slip when the slip is in the mold, especially the gypsum mold, so the secondary slip compared to the primary slip is the diffusion distance of water, that is, the plaster mold at the slip. The distance to is increased to form a predetermined thickness at a slower speed. Therefore, it is preferable to increase the specific gravity of the secondary slip to have the specific gravity ratio as described above, since the solid content in the slip must be increased for fast casting in the secondary slip casting. In view of this, in the case of multi-layered moldings having two or more layers, for example three layers, the slip is slowed at a slower rate during secondary casting compared to primary casting and tertiary casting compared to secondary casting. Will form a thickness. Therefore, it is preferable that the specific gravity of the secondary slip is larger than that of the primary slip, and the specific gravity of the third slip is larger than that of the secondary slip.

Through these experiments, a multilayer molded body consisting of the outer layer molded with the selected primary color paper slip and the inner layer molded with the secondary base material slip is manufactured, and the surface is engraved to form a three-dimensional design to manufacture living magnetism. The process will be described below with reference to FIGS. 1-2A and 2B.

1 is a process flowchart of manufacturing a multilayer molded body with a primary color paper slip and a secondary base material slip, and manufacturing a living magnetic body having a three-dimensional design formed on its surface, and FIG. Illustrated in sectional view.

As in steps S1 and S2 of FIG. 1, the slipper slip and the base slip are prepared and prepared as described above. For slip casting, a mold 10 such as a gypsum mold having a desired shape is prepared as shown in FIG. 2A, and then a primary slip casting is performed with a slipper of paper (step S3 of FIG. 1). Primary slip casting may be performed as a base material, and it is not important which primary slip casting is used. In this embodiment, two-layer molded bodies are manufactured by performing primary and secondary slip casting. More than three slip castings may be performed to produce three or more layers of molded bodies. In the first slip casting, as shown in (b) of FIG. 2A, after injection of the slipper 111 into the mold 10, the slip slip is maintained until a desired thickness is formed. As a result, the primary molded body 112 is molded as shown in FIG. 2A (c). When the first slip casting is completed, the second slip casting is continuously performed without a drying process (step S4 of FIG. 1). In other words, after the sacrificial paper slip 111 is poured out as shown in (c) of FIG. 2A, the base holding slip 121 is immediately injected (FIG. 2A (d)). After maintaining until the desired thickness is formed, the secondary molded body 122 is molded as shown in FIG. At this time, after the injection of each slip, the casting time is adjusted so that the thickness ratio of the primary molded body 112 formed by the color paper slip and the secondary molded body 122 formed by the base holding slip is about 1: 3. The primary dye paper slip 111 is poured out after about 20 seconds of infusion, and the secondary base material slip 121 is poured out after about 10 minutes of infusion. When the primary and secondary slip casting is completed, the multilayer molded body 100 is dried at room temperature for about 6 hours (step S5 of FIG. 1 and (f) of FIG. 2A), and then the intaglio design pattern is engraved on the surface. Such a design pattern is excavated so that a constant pattern is given to the surface of the molded body, such as a engraving engraving using a knife or the like. In this case, the pattern in which the secondary coloring paper is exposed on the basis of the primary base material is expressed in an intaglio, so that the pattern having a three-dimensional effect appears on the surface of the product as a whole. As an example, (a) and (b) of FIG. 2B are a side sectional view and a front view of a molded object in which the circular recessed part 130 was formed in the surface. As shown in FIG. 2B, when the circular concave portion 130 is formed on the surface of the molded body, the secondary base material is concavely exposed in a circular shape based on the primary coloring paper to form a three-dimensional design pattern. The multi-layer molded body 100 formed with a three-dimensional design pattern is dried for 24 hours or more (step S7 of FIG. 1) to completely remove moisture in the molded body, thereby preventing the molded body from bending or generating defects upon firing. After drying, a shaping operation (step S8 of FIG. 1) is performed to remove traces on the surface of the surface generated during molding due to the mold defect, and unnecessary portions buried together when the molded body is removed from the mold. Next, the primary firing was performed for 6 hours at 730 degrees Celsius (step S9 in FIG. 1), followed by the oiling process (step S10 in FIG. 1), and then again for 11 hours and 30 minutes at 1295 degrees Celsius. The product is completed through (step S11 of FIG. 1). By applying this technology, parts such as the handle part of a general living room can be easily expressed with a different color from the surface without introducing a color using a brush or an independent application process.

In this process, the process of patterning the surface with a cutting tool such as a engraving knife is a cost reduction and mass production by a process of forming a design on the surface of the multilayer molded body by an automated process rather than manual labor. For example, by attaching a multi-layer molded body to the jig and rotating it at a constant speed, while digging the surface of the multi-layer molded body in a predetermined pattern while advancing the cutting tool back and forth on the surface of the multi-layer molded body, it is like cutting a metal by lathe work. It is possible.

On the other hand, when the design pattern is formed by the intaglio formation, as described above, if the thickness of each layer of the multilayer molded body is adjusted, the width of the exposed inner layer is changed, so that the thickness of each layer and the width and shape of the intaglio forming grooves are different. Adjust the to get the design pattern you want. 3A and 3B show the change in the design pattern according to the side cross-sectional shape of the circular groove and the thickness of the outermost layer. (A) and (b) of FIG. 3A are cross-sectional side views and front views of a multilayer molded body when a circular groove is formed on the surface in a hemispherical shape, and (c) and (d) are circular grooves formed on the surface in a cone shape. Side cross-sectional view and front view of a multilayer molded object. In this case, it can be seen that in the case of the hemispherical circular groove, the secondary dye paper 122 is exposed more than the conical circular groove. The multilayer body of FIGS. 3B (a) and (b) is a case where the secondary color paper 122 is formed thicker than the multilayer bodies of (c) and (d) and circular grooves of the same size and shape are formed on the surface. . It can be seen that the multilayered body in which the secondary dye paper 122 is formed thicker (FIGS. 3B and 3B) is not exposed to the secondary dye paper 122.

Example 2

4A and 4B illustrate a process of forming a multilayered molded body of a living magnetic body according to Example 2 of the present invention and a molded body in which a three-dimensional design pattern is formed on a surface of the multilayered molded body manufactured as described above. In Example 2, the surface of the mold to be cast is embossed and embossed, respectively, and after the multilayer casting, the surface showing the three-dimensional color can be expressed on the living magnetic surface. That is, when the primary slip casting and the secondary slip casting are performed using the mold 20 having the shape shown in FIG. 4A as described above, the shape protruding to the surface as shown in FIG. 4A (f) is obtained. The multilayered molded body 200 can be obtained. When a part of the protruding portion of the multilayer molded body 200 is cut, for example, by the line A-A shown in FIG. 4A (f), a design showing a three-dimensional color can be expressed on the living magnetic surface. (A) and (b) of FIG. 4B are a side sectional view and a front view of the multilayer molded object 200 in which a part of the protruding part is cut. In the multilayer molded body 200 illustrated in FIG. 4B, the protruding portion 231 is a protruding primary coloring paper and the protruding portion 232 is a protruding secondary base material, unlike the multilayered molded product 100 illustrated in FIG. 2B. And different bases appear together in the portions where both the base and the base protrude.

Since the cutting process is also possible by automation rather than manual operation, mass production and cost reduction are possible as in Example 1.

The present invention according to the above-described configuration can express a new pattern not seen in the design drawn by the existing brush by giving a three-dimensional effect on the surface of the living magnetic by completely breaking the conventional planar design technology. Furthermore, since the living magnet produced according to the present invention is omitted, the transfer paper is attached and the additional firing operation is reduced, and in addition to the cost, it is possible to form a variety of three-dimensional design patterns on the surface of the living magnetic, rather than a flat design. In addition, the three-dimensional design pattern is formed by utilizing the color of the base as it is, it is possible to obtain a more natural design.

Furthermore, since the living magnet according to the present invention forms a design pattern on the surface of the living magnet by an automated process, it is possible to uniformize the product and mass produce it. Moreover, in conventional inlaying techniques, the hand of the desired color is manually filled in grooves formed to express different colors on the surface, which is not suitable for uniformity and mass production, and it is difficult to smoothly process the surface of the body filled in the grooves. In contrast, the living magnet according to the present invention does not need to fill the grooves with other materials as in the conventional inlay technique because different colors are exposed and expressed through the grooves or the cut protrusions. Thus, the living magnet according to the present invention can be smoothly processed on all surfaces including grooves or cut protrusions.

The technique of multi-layer body development using slip casting according to the present invention can be applied not only to the production of living magnets, but also to the multi-layer manufacturing method of a substrate having a complicated form. For example, in the case of a product that resists thermal shock and requires low specific gravity, in the three-layer molded body, two outer layers are manufactured using a material having a low coefficient of thermal expansion and an inner layer uses a material having a relatively low specific gravity. You can get the product you want. In this case, it is possible to manufacture using the multi-layer slip casting manufacturing method according to the present invention, this application will be variously applied to the production of multifunctional special products using ceramic. In addition, automatic engraving technology can be applied to many other molding techniques, especially the surface design of dried ceramic substrates. Overall, the application of the present technology can be widely applied from a new perspective for the manufacture of high-performance ceramic products and for the design of surfaces with different internal and external functions. Economic and industrial aspects are expected to create a market by living magnets with new three-dimensional design patterns, which will lead to a new activation in the living magnetic market. In addition, it is possible to expand the market by exporting three-dimensional designs for each purpose and atmosphere, instead of simple flat design patterns. Therefore, the new method using the multilayer body can be widely used not only in the ceramic magnetic field, but also in various kinds of household goods that consider design.

1 is a process flowchart of manufacturing a living magnetic material having a three-dimensional design formed on its surface according to Embodiment 1 of the present invention.

Fig. 2A is a side cross-sectional view showing a step of molding a multilayered molded body of a living magnet according to Example 1;

FIG. 2B is a side cross-sectional view and a front view of a molded body in which an intaglio pattern is formed on the surface of the multilayer molded product produced in FIG. 2A; FIG.

Fig. 4A is a side sectional view showing a step of forming a multilayered molded body of a living magnet according to Example 2;

4B is a side cross-sectional view and a front view of a molded body in which a three-dimensional design pattern is formed on the surface of the multilayer molded product produced in FIG. 4A.

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

10, 20: template

100, 200: multilayer molded body

111, 211: color paper slip

112, 212: primary molded body

121, 221: foundation slip

122: secondary molded body

130: recess

231, 232: protrusions

Claims (10)

In the manufacturing method of the household magnetic, Preparing a plurality of body slips having different colors; Forming a multilayer molded body by performing a plurality of slip castings with respective base slips, First drying the molded body; Removing a part including the surface of the molded body to expose a part of the inner layer to the outside to form a design pattern; Secondary drying and heat treatment of the molded body, The plurality of slip casting in the step of forming the multi-layer molded body is characterized in that the production method of the household magnetic, characterized in that is carried out continuously without a drying process. The method of claim 1, wherein preparing the holding slip comprises aging the holding slip for 72 hours or more. The method of claim 1, wherein the forming of the design pattern includes rotating the molded body and advancing and cutting the cutting tool on the surface of the rotating molded body. . The manufacturing method of the living magnet according to claim 1 or 2, wherein the specific gravity ratio of the base slips continuously slip cast is in the range of 1.00 to 1.05. The method of claim 1 or 2, wherein the holding slip includes a primary holding slip having a specific gravity of 1.81 and a secondary holding slip having a specific gravity of 1.83. The method of claim 1, wherein at least some layers of the layers constituting the molded body include protrusions, and wherein the forming of the design pattern includes cutting at least a portion of the protrusions formed on the surface of the molded body. Manufacturing method of living porcelain made with. The method according to claim 1 or 2, wherein the thickness ratio of the innermost layer of the molded body to the thickness of any other layer is 10: 3 to 10: 1. The method of claim 1 or 2, wherein the primary drying of the molded body comprises drying at room temperature for 6 hours. The method of claim 1 or 2, wherein the holding slip is 44 ~ 50% of the sol peptizing agent used 0.15 to 0.3wt% of the production method of household magnetic. A household magnetic product according to any one of claims 1 to 3.