KR20040058820A - Manufacturing method for ceramic - Google Patents

Abstract

PURPOSE: Provided is a manufacturing method of pottery with a visual and tactile beauty due to cracks made by applying deflocculant to formed pottery and expanding pottery. CONSTITUTION: The pottery with cracks are manufactured by the following steps of: (i) mixing pottery raw materials such as clay, feldspar and quartz, and forming pottery with a size smaller than the desired size; (ii) applying a deflocculant(11b), sodium silicate, to a formed pottery(11a) for a deflocculant-coated layer(11b,13b,15b), and expanding the pottery by applying pressure to the inside of the pottery while the wheel is spinning, wherein the coated layer(outside) is cracked and the uncoated layer(inside, 13a) is smooth, which is caused by viscosity difference between deflocculant-coated and uncoated pottery materials; (iii) biscuit firing, glazing and firing.

Description

MANUFACTURING METHOD FOR CERAMIC

The present invention relates to a method of manufacturing porcelain, in particular, after applying a peptizing agent to a porcelain molded body made of a base (확장 地) and then expanded and molded into a desired shape, the viscosity of the part applied with the peptizing agent becomes small, and the part not applying the peptizer is The smoothing and peptizing will result in cracks, which can provide new aesthetic ceramic products.

In general, ceramics can be classified into various types according to the type of clay, the molding process, the firing process and the firing temperature, the type of glaze or decorative technique, the name of the place, the use. There are classifications based on the composition of clay and firing results, such as celadon, white porcelain, pottery, and bone pottery (which are also related to their developmental history), and they are classified by glaze or decorative method. There are names such as cinnabar and iron coin.

It can be classified into soft magnetic and hard magnetic according to the firing temperature, and it is also called by calcination method such as chlorine, lacquer, open-air firing, firewood burning, etc. It is also classified into industrial ceramics such as ceramic ceramics and insulators, electronic components, and chemical containers.

The manufacturing process of ceramics classified as above is as follows.

1. Toto

Silicate, feldspar, kaolin, and plastic clay, which are the raw materials of ceramics, are combined, crushed and refined to be rolled into a cylindrical shape and wrapped and stored in vinyl to prevent moisture.

2. Molding

There are many methods for molding, but the spinning wheel molding by hand using a spinning wheel and the plaster molding method using a plaster mold are typical.

3. First Baking (Baking, First Roast)

In general, also known as BK (biscuit fire) firing or firing, firing up to about 800-900 ℃.

4. Poetry

There are three ways of reading.

First, draw a picture on the BK product (handpainting) or attach the lower transfer paper before oiling with the under glaze.

Secondly, inglaze, the transfer paper is attached on the live glaze so that the pattern can be soaked into the glaze during firing.

Third, the overglaze test is a method of attaching an upper transfer paper to a finished product (blank) and baking it at 750 ° C to 850 ° C in an electric kiln.

To put it simply, Hahoe has a feeling of rising under the glaze, the middle is soaked in the glaze, and the upper has a pattern on the surface of the glaze.

5. Seeu

It is the process of glazing the first fired product. In some cases, the product may be dried completely and milked before first firing.

6. Main fire (main roast, chaebol roast)

It is a process to put the product which has been oiled into a hot plate (board plate) or crab and load it at 1250 ~ 1300 ℃.

In the conventional ceramics manufacturing method as described above, a method of making a variety of shapes of ceramics in a certain shape is the poetic process, the oiling process using the characteristics of various glazes, and the carving technique, inlay technique, limb technique, bite technique, relief technique and painting technique. It stayed in the way of getting through the decoration process.

The present invention further intends to open a new horizon for the production of colorful ceramics by introducing a new ceramic decorative technique.

The present invention is deeply related to the molding process of the conventional ceramics manufacturing process as described above, by applying a peptizing agent to a ceramics molded body made of a base material to vary the viscosity of the coating layer and non-coating layer, When the porcelain is expanded to a shape, an uncoated layer is smoothly formed, and the coating layer is cracked to form a crack, and thus an object of the present invention is to provide a new aesthetic porcelain.

It is also an object of the present invention to provide a new aesthetic container, as well as a certain ornament, practical tiles through the ceramic manufacturing method.

Figure 1 is a schematic process diagram showing a method using a spinning wheel of the ceramic manufacturing method according to the present invention.

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

11a, 13a, 15a: primary molded body 11b, 13b, 15b: peptizing agent coating

In order to achieve the above object, a method of manufacturing ceramics according to the present invention comprises: a primary molding step of making a smaller shape than a desired shape by refining a mixture of materials such as clay, flux feldspar, and durable quartz; An application step of applying a peptizing agent to one or both surfaces of the primary molded body; A secondary molding step of expanding the molded article subjected to the applying step to a desired shape; And a baking step of baking the secondary molded body.

Hereinafter, a method of manufacturing ceramics of the present invention will be described in detail with reference to the accompanying drawings.

First, the primary molding step is made in such a way as to make a shape smaller than a desired shape by drilling a mixture of materials such as clay, flux feldspar and durable quartz.

The body is obtained by refining and mixing tato (胎 土, which means pure clay and having plasticity when mixed with water and solidification when baked). The clay is made of clay, kaolin, pyrophylite, pottery stone, feldspar, quartz, etc. The basic form of the base used in ceramics is generally As more than 50% of clay ore is used, a large amount of feldspar, which is a flux, and quartz, which is a durable material serving as a skeleton, are mixed. The possession of ceramics varies according to the use of mineral combinations, and the final purpose should be to distribute the raw materials uniformly in the substrate and to give the processability according to the moisture required for molding.

The first molding step is the process of ① clay (() and clay, clay, etc.), ② crushing and mixing the raw materials, ③ grind (dirt) of the prior art ceramic manufacturing method Although omitted, this is obvious to those skilled in the art.

The shape of the primary molded body is different depending on the shape of the final ceramics desired and the manufacturing method. If it is a method using a molding frame will be formed in a predetermined plate shape, as shown in Figure 1 if using a spinning wheel (also known as 'potter') will be formed symmetrically. In addition, conventional injection molding, handmade molding, spinning wheel molding, press molding, roller machine molding, extrusion molding and the like can be used according to the appropriate final ceramic form.

These methods can also be used in subsequent secondary molding steps.

Next, the coating step is to apply a peptizer (deflocculant) on one side or both sides of the primary molded body.

Peptides are additives that disperse particles in a suspension to lower the viscosity of the suspension, and the counteracting drug is called a flocculant. The peptizers are organic or inorganic peptizers. It is recommended to use organic peptizers such as sodium silicate or sodium carbonate. It is better to use 0.3 to 0.8 percent of the amount used, and for the porcelain which used bone ash as a solvent, it is better to use sodium silicate which is better peptized than sodium carbonate.

Such peptizing agent is applied using a spray, brushing, immersion method, etc., thereby lowering the viscosity of the body.

The secondary molding step is to expand the molded body subjected to the application step to make a desired shape.

Since the peptizer coating layer is less viscous than the non-coating layer, the coating layer cannot keep up with the non-coating layer area expansion rate, causing cracks in the coating layer.

Peeling agent coating layer may be located on one side or both sides of the non-coating layer, depending on the purpose of the final molding ceramics. For example, if it is to be used as a container, a non-coating layer is placed on the inner surface of the container and a non-coating layer is located on the outer surface so that a crack may be applied to the outer surface. The same will be true of porcelain for tiles. However, in the case of a certain ornament it may be suitable that the coating layer is located on the inner surface or the coating layer on both the inner and outer surfaces.

Finally, the firing step is to bake the molded finished product.

The firing step may be composed of a first-time roasting, seeyu and chaebol roasting process of the general ceramics.

Firing is a process that requires a high level of skill because it exhibits subtle reactions depending on not only the properties of the base but also the fuel used, temperature, pressure of the outside air, combustion atmosphere, and the like. The kilns used are either small gas kilns, traditional firewood kilns or shuttle kilns suitable for the production of small quantities of various varieties, and tunnel kilns for mass production. In particular, the kilns can satisfy both aspects of production and product stability.

When the clay is earthenware or porcelain for earthenware, the firing step may have a temperature of about 900 ° C. and about 1200 ° C. to 1300 ° C. of the conglomerate.

Seeding process is dipping method, pouring method, spraying method, painting method, brushing method, shaking method, dusting method, volatilization method ), And the appropriate method may be used if necessary.

In addition, as described above, ceramics may be drawn with a certain pattern or picture through poetry stages such as upper, middle, and lower. In addition to this, a decorative process such as engraving technique, inlay technique, double sheet technique, bite technique, relief technique, and painting technique may be added.

Before this firing step may be subjected to a drying step of drying more than 95% of the moisture (usually 1 to 2 weeks in the case of natural drying) if necessary.

Figure 1 shows a symmetrical ceramic manufacturing process using a spinning wheel. First, the primary molded body 11a smaller than the desired shape is made, and the peptizing agent 11b is apply | coated to the outer surface (S11). When the viscosity of the substrate is lowered due to the peptizing agent layer 11b, when the pressure is applied to the inner surface with one hand as the spinning wheel is rotated (straight arrow), the uncoated layer 13a expands and the coating layer 23b expands and cracks. (S13). Accordingly, the finished product is completed with a symmetrical jar having a smooth inner surface 25a and an outer surface 25b in which a crack C is formed (S15).

As described above, in the method of manufacturing ceramics according to the present invention, by applying a peptizing agent to a ceramic molded body made of a base material, the viscosity of the coating layer and the non-coating layer is different, and the ceramics are expanded to a desired shape. Since the uncoated layer is smoothly formed and the coating layer is cracked to form a crack, a ceramic product having a new visual and tactile aesthetic can be provided.

According to the purpose of the ceramic ware manufacturing method of the present invention through a combination of the appropriate anti-appliance coating layer-non-coating layer can be obtained a variety of products, such as practical products, such as practical containers, ornaments or tiles.

In the method of manufacturing ceramics according to the present invention described above, a conventionally known technique related to ceramics is omitted, but those skilled in the art can infer and infer this.

In addition, although each manufacturing step has been described in a limited relationship, these manufacturing processes can be carried out in various modifications and combinations by those skilled in the art, in which case such modifications and combinations should be understood as being in accordance with the spirit of the present invention, Therefore, it should be interpreted as falling within the scope of the present invention.

Claims (5)

A primary molding step of making a shape smaller than a desired shape by cultivating a base material mixed with clay, flux feldspar, and durable quartz; An application step of applying a peptizing agent to one or both surfaces of the primary molded body; A secondary molding step of expanding the molded article subjected to the applying step to a desired shape; And A method of manufacturing ceramics comprising the firing step of baking the secondary molded body. The method of claim 1, The peptizing agent of the coating step is a method of producing ceramics, characterized in that the sodium silicate. The method according to claim 1 or 2, The first and second forming step is a ceramic manufacturing method, characterized in that made through a spinning wheel to obtain a symmetrical finished product. The method according to claim 1 or 2, The firing step is a method of producing a ceramics having a crack surface, characterized in that consisting of the first pottery, the process of producing a ceramic ware, chaewoo and chaebol. The method of claim 4, wherein The firing step is a ceramic manufacturing method characterized in that it further comprises a gate step such as upper, middle, lower.