JP2005179160A - Clay for earthenware repair or shape modification, and method for earthenware repair or shape modification - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide clay for earthenware repair or shape modification and a shape modification method devised in such a manner that the repair of the breakage or defective part of the earthenware or the shape modification thereof can be easily and reliably performed. <P>SOLUTION: Earthenware repair clay 10 or shape modification clay 10 is prepared by incorporating a fiber cast which is an unshaped refractory heat insulating material by 20 to 30wt% by weight into the clay. The clay is used for repairing the crack and defect generated in the earthenware in the course of manufacture or for shape modification thereof. The clay filled into the cracked and defective points for repair can be integrally fitted to the the cracked and defective points. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to clay for pottery repair or modeling change and a method for pottery repair or modeling change, and in particular, it is possible to reliably and easily repair damaged or defective parts of ceramics or change modeling, and cleanly in appearance. About.

  Conventionally, in the production of earthenware, cracks and defects of the earthenware may occur in the process of drying or baking at a low temperature of the earthenware produced in the middle of the production with kneaded clay. The repair of pottery in the middle of production is repaired by filling cracked and missing parts with the same clay as the modeled clay. In addition to the above-mentioned pottery repair, the clay used for changing the modeling of the pottery is the same clay as the clay modeled from the viewpoint of identity with the clay of the pottery. As for the clay, white clay is used in Shigaraki ware, and red clay is used in Bizen ware. After repairing the pottery, the clay is dried for 2 to 3 days, and then the surface is finished with a sandpaper or the like, and the surface is finished by baking.

  In addition, the method for changing the modeling of the pottery is to attach clay to the modeling change part in a state where the clay of the pottery being produced is dried or baked at a low temperature, or to join the additional part via repair clay, Allow 2-3 days to dry. After this, the surface is finished with sandpaper or the like, and finished as a pottery by firing or the like.

  However, the method of using the same clay as the pottery for filling or adhering the repair clay to the pottery once dried or baked at a low temperature does not allow complete bonding, peeling, gaps, steps Will occur. For this reason, there exists a problem that it is not what is satisfactory in the repairing of the defect | deletion part of the said conventional pottery, or a modeling change method. Then, the method which adhere | attaches and repairs the broken piece of the pottery with a strong ceramic adhesive (trade name ceramic paste, manufactured by Mino Clay Co., Ltd.) can be considered. Even if this bonding method is carried out, complete integration is impossible, and the bonded portion appears on the surface as lines and streaks, so the appearance and appearance are not good. Therefore, satisfactory repairs or modeling changes cannot be achieved with the above-described method, and there is no other way than reworking even if it is troublesome. As a method for repairing ceramics, there is a method of filling a curable resin in a damaged / defected portion. (For example, refer to Patent Document 1).

JP 2002-274931 A

  The present invention has been made on the basis of the above points, and the object of the present invention is to make a pottery that can be reliably and easily repaired or changed the shape of a broken or broken part of the pottery, and can be cleaned in appearance. The object is to provide a clay for repair or modeling change and a method for repairing or modeling ceramics.

  In order to achieve the above object, the clay for pottery repair or modeling change according to claim 1 of the present invention is characterized in that fiber clay, which is an indefinite fireproof heat insulating material, is mixed with clay for pottery manufacturing.

  Moreover, the clay for earthenware repair or modeling change according to claim 2 is the clay for earthenware repair or modeling change according to claim 1, wherein the fiber cast which is an indefinite fireproof heat insulating material is 20 to 20 by weight ratio to the clay for earthenware manufacturing. It is characterized by containing 30% by weight.

  Moreover, the pottery repair or modeling change method according to claim 3 is a fiber that is clay and indefinite refractory heat insulating material in a damaged / defected part or modeling change part that occurs when clay for pottery production is dried or baked at a low temperature. The repair clay mixed with the cast is filled or adhered, or the additional portion is joined through the repair clay and dried.

  According to the clay for pottery repair or modeling change according to the present invention, the clay is mixed with fiber cast which is an indefinite fireproof heat insulating material, and in particular, the fiber cast is contained in a weight ratio of 20 to 30% by weight with respect to the clay. is there. This clay is used for repairing cracks, defects or changing the shape of the pottery being made. As a result, the clay that has been repaired by filling the cracked and missing part is integrated with the cracked and missing part.

  Moreover, according to the pottery repair or modeling change method of the present invention, first, the pottery may be damaged or missing in the state of being manufactured by drying the modeled clay or baking it at a low temperature. In addition, there is a case where it is desired to change the modeling. Repaired clay, which is a mixture of clay and fiber cast, which is an indefinite refractory heat insulating material, is roughly filled in the damaged / defected portion or the modeling change portion. Alternatively, the modeling change portion is formed and repaired with repair clay, or the additional portion is joined via the repair clay. After this pottery is repaired or deformed (usually about 2-3 days), it is dried. And the excessive repair clay in fully dried pottery is polished with sandpaper to finish the surface smoothly. After this, fully dried pottery is fired to make a pottery product. As a result, the damaged or missing parts of the final product, pottery, will be completely integrated by repair. In addition, the modeling change part is also integrated under complete joining, and this operation is easily and reliably performed.

  The clay for pottery repair or modeling change according to the present invention enables pottery repair or modeling change with clay, which has been impossible until now. In addition, the damaged part and the missing part can be completely integrated with the main body by repair clay, and repair with high durability can be performed. Moreover, it can be finished neatly to a state where repair is not known.

  Furthermore, when mixing the clay and the fiber cast which is an indefinite fireproof heat insulating material, a firm joint state can be obtained by using the above ratio.

  Furthermore, according to the above-mentioned pottery repair or modeling change method, it is possible to reliably and easily repair damaged parts and missing parts, which have been difficult in the past, if they are dried or baked at a low temperature. The modeling change in can be done reliably and easily as well.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a vase with a damaged part. FIG. 2 is an explanatory view showing a vase repairing procedure, FIG. 3 is a perspective view showing another missing portion and an additional / modeling changing portion of the pottery, and FIG. 4 is a flowchart of the vase repairing method.

  First, the repair procedure of a vase with a damaged part will be described. In the vase 1 shown in FIG. 1, a defect 1A is generated in a state where the shaped clay is dried or baked at a low temperature. As shown in FIG. 2A, the repair procedure for the defect portion 1A generated in the vase 1 is such that the vase 1 having the defect portion 1A is placed on the work table T. As shown in FIG. 2 (b), the repair clay 10 is roughly filled in the defect portion 1 </ b> A in the vase 1. The repair clay 10 is preferably a mixture of fiber cast, which is an indefinite fireproof heat insulating material, in the same clay as the vase. However, clay different from the vase may be used. The repaired vase 1 is dried for a certain period of time (usually sun drying for 2 to 3 days). After drying, as shown in FIG. 2 (c), the swelled portion of the repair clay 10 is polished with sandpaper to finish a smooth surface 10A. The repair is completed as described above, and then, as shown in FIG. 2 (d), the pottery 1 'is obtained by firing the pottery by a normal manufacturing method.

  In addition, as a defect of the pottery to be repaired, in addition to the damaged / defected portion 1A shown in FIG. 1, the crack 2A of the plate 2 shown in FIG. 3A, the dent 3A of the component 3 shown in FIG. 3C, the scratch 4A of the cup 4, the addition of the handle 5A of the cup 5 shown in FIG. 3D, the shape change of the recess 6A of the three-dimensional object 6 shown in FIG. Though possible, it is not limited to this case.

  As the repair clay 10, a fiber cast, which is an indefinite refractory heat insulating material, mixed with clay is used, and its detailed composition is as follows. The repair clay 10 preferably has a composition in which the clay is 70 to 80% by weight and the fiber cast is 20 to 30% by weight. Of course, it is good also as repair clay 10 of mixing ratios other than the above. The repair clay 10 is a mixture containing moisture in clay or fiber cast. The viscosity adjustment, that is, moisture adjustment is performed by adding water arbitrarily or by drying.

The fiber cast is a paste-like amorphous refractory material obtained by wet-mixing bulk fiber (ceramic fiber), an inorganic binder, and the like, and is used as a repair material in other industrial fields. As the fiber cast, for example, fiber cast # 700 manufactured by NICHIAS Corporation can be applied. According to this, the maximum heat resistance is 1500 ° C., the density after drying is 700 kg / m ³ , the chemical components are 77% of aluminum oxide (Al 2 O 3), and 23% of silicon dioxide (SiO 2). Thus, the bending strength is 5.2 kg / m ² after drying at 110 ° C. and 9.3 kg / m ² after firing at 1200 ° C. The heat shrinkage rate is 2.0% at 1200 ° C and 3.0% at 1500 ° C, and the shrinkage is low. The repair clay 10 of the present invention is a mixture of the above clay and fiber cast. When this is used for repair or modeling change, there is little shrinkage even after drying, so the same material is fused and integrated without separation. It is thought that

  Of course, fiber casts other than the above product numbers can be used. Moreover, you may add a fireproof hardening material to what mixed the said clay and fiber cast. This amount is about 10% by weight. This refractory hardening material is a refractory used in a place where the thermal power of an incinerator is strong, and has the property that it becomes hard when heated by fire and the fire resistance is enhanced. Therefore, when a fire-resistant hardening material is mixed, integration of the repair viscosity 10 and the pottery is further promoted, leading to an improvement in strength. A small amount of neutral detergent (surfactant) may be injected into the water used for the viscosity adjustment. Thereby, the penetration power to the clay on the pottery side of the repair clay 10 can be increased, and the adhesion force to the pottery can be increased.

  Next, a repair method for repairing the damaged / deleted portion 1A of the vase 1 according to the first embodiment will be described with reference to a flowchart shown in FIG. First, “modeling of vase” A is performed, and then the modeled vase 1 is “dried or low-temperature baked” B. Here, low-temperature firing means firing at a temperature of 573 degrees Celsius or less at which the composition of the clay changes. Usually, it is about 400 to 500 degrees Celsius. A “damage / defect” C may occur after the drying or low-temperature firing. The repaired clay 10 in which the clay and the fiber cast which is an indefinite fireproof heat insulating material are mixed is roughly “filled or adhered” D to the damaged / destructed portion. This vase 1 is “dried for 2-3 days” E after “filling or adhering” D with the repair clay 10. Then, the swelled portion of the repair clay 10 in the sufficiently dried vase 1 is polished with sandpaper to obtain “surface polishing finish” F. This completes the repair of pottery. Thereafter, the fully dried pottery G is “fired” G to complete the product vase 1 ′. The “drying” is usually dried for 2 to 3 days in the sun, but this drying period is arbitrary, and the drying method is arbitrary such as drying in a drying furnace. Also, “surface polishing finish” may be omitted if unnecessary.

  As described above, according to the present embodiment, the following effects can be obtained. First, by using the pottery repair clay 10, it was possible to repair pottery with clay, which was impossible until now. That is, the damaged part and the missing part can be completely integrated with the repair clay and repaired in a highly durable state, and it can be finished neatly to a state where the repaired part is not known.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the case of the second embodiment, a handle 5 </ b> A as an additional portion is joined to the cup 5 via the repair clay 10.

  First, in FIG. 5, a procedure for adding a handle 5 </ b> A that is an additional portion for the cup 5 will be described. As an example of joining the additional portion, a cup 5 without a handle 5A is placed on the work table T as shown in FIG. As shown in FIG. 5 (b), the cup 3 is formed in the shape of a handle 5 </ b> A, and the handle 5 </ b> A is pressed against the side wall surface of the cup 3 via the repair clay 10 and joined. The repair clay 10 is preferably a mixture of the same clay as the cup 3 and the handle 5A and a fiber cast which is an indefinite refractory heat insulating material, but may be a mixture of a different clay and a fiber cast. . The cup 5 to which the handle 5A is added is sun-dried for 2 to 3 days, as shown in FIG. 5 (c). After drying, the joint of the repair clay 10 is polished with sandpaper to finish the surface smoothly. After that, as shown in FIG. 5 (d), the fully dried cup 5 is baked to complete a ceramic product cup 5 '. In addition, although the said handle 5A illustrated the case where it formed with the same clay as a cup, it may be formed using the repair clay 10 and this may be joined to the cup 5 directly. Other configurations are the same as those in the first embodiment, and the same reference numerals are given and description thereof is omitted.

  Therefore, the method of joining the handle 5A to the cup 5 is performed as shown in the flowchart of FIG. First, “Cup Modeling” A1, which is a pottery being produced, is made. Subsequently, the shaped cup 5 is in a state of “drying or low-temperature firing” B1. The “cup handle 5A is shaped” C1 to be bonded to the cup 5. This is because the handle 5A is made of the same clay as the above clay. This handle 5A is also “dried or fired at a low temperature”. Next, “join the handle 5 </ b> A” is D <b> 1 through the repair clay 10 to the cup 5. Then, it is “dried for 2 to 3 days” E1. Then, the joint portion of the sufficiently dried repair clay 10 is polished with sandpaper or the like to obtain “surface polishing finish” F1. This completes the process of joining the handle to the cup. After this, the fully dried earthenware is “fired” G1 to make a product cup 5 ′.

  As described above, according to the present embodiment, by using the repair clay 10, it is possible to join the additional portion with clay, which has been impossible until now. In other words, the handle 5A can be completely integrated with the repair clay 10 to be joined to the cup 5 in a highly durable state, and the finish can be neatly finished to a state where it has not been added.

  Next, a third embodiment of the present invention will be described with reference to FIGS. In the case of the third embodiment, the flat plate 6 having the recess 6A is shaped using the repair clay 10.

  First, the flat plate 6 is shaped as shown in FIG. The flat plate 6 has a recess 6A. However, there is a case where it is desired to change the modeling to eliminate the depression 6A at this stage. In this case, first, the flat plate 6 is placed on the work table T as shown in FIG. And as shown in FIG.7 (c), the hollow 6A of the flat plate 6 is filled with the repair clay 10 which mixed the clay and the fiber cast which is an indefinite fireproof heat insulating material, and the modeling change part 6B adheres. And after modeling change, it is dried for 2-3 days. Next, the modeling change portion 6B of the sufficiently repaired clay 10 is polished with sandpaper to finish the surface smoothly. This completes the pottery modeling change. Thereafter, a flat plate 6 'of a product whose shape has been changed by firing a sufficiently dried ceramic is completed. Other configurations are the same as those in the first embodiment, and the same reference numerals are given and description thereof is omitted.

  Next, a modeling change method for changing the modeling of the flat plate 6 with the repair clay 10 will be described with reference to the flowchart shown in FIG. First, “flat plate modeling” A2 is performed, and this flat plate 6 is “dried or low-temperature fired” B2. It is necessary to “model change” C2 for the recess 6A of the flat plate 6. Therefore, the hollow 6A is filled with 10 large repair clay obtained by mixing clay and fiber cast, which is an indeterminate fireproof heat insulating material, and "remodeling with repair clay" D2. And after the modeling change by the repair clay 10, "2 to 3 days drying" E2 is performed. Then, the modeling change part 6B of the repair clay 10 which has been sufficiently dried is polished with sandpaper to be “surface polished finish” F2. After that, a sufficiently dried ceramic is referred to as “fired etc.” G2 to form a flat plate 6 ′ of the product whose shape has been changed.

  As described above, according to the present embodiment, by using the pottery repair clay 10, it is possible to change the modeling of pottery using clay, which has been impossible until now. In other words, the repair clay 10 for modeling change is completely integrated with the pottery and can be attached in a highly durable state, and it can be finished beautifully to a state where it is not known that the model has been changed.

  As described above, according to each embodiment of the present invention, the following effects can be obtained. The clay for pottery repair or modeling change enables pottery repair or modeling change with clay, which was impossible until now. And a broken part and a defect | deletion part can be completely integrated with repair clay, and repair or modeling change in a highly durable state can be performed, and it can finish beautifully to the state which does not know that repair or modeling change was carried out.

  Furthermore, when the clay and the fiber cast, which is an indefinite fireproof heat insulating material, have a clay weight ratio of 70 to 80% and the fiber cast weight ratio of 20 to 30%, a strong bonding state can be obtained. .

  Furthermore, according to the pottery repair or modeling change method, it is possible to reliably and easily repair a damaged part or a defective part if it is dried or baked at a low temperature, and the modeling change in the pottery is also reliable. And easily.

  Of course, the present invention is not limited to the above-described embodiment, and appropriate design changes can be made within the gist of the invention. For example, the repair clay 10 is not limited to the above-described composition components, and a wide range can be used. Even if the composition component of the repair clay 10 is changed, the same actions and effects as those of the above embodiment can be obtained.

  Although this invention demonstrated in embodiment of the clay for repairing a broken part in an earthenware, a defect | deletion part, or a modeling change, and a modeling change method, it is not limited to it. For example, the present invention can be applied to repairing ceramic materials, artificial stone materials, and the like and changing the modeling method.

It is a perspective view of the vase which shows 1st Embodiment of this invention and has a broken part. It is explanatory drawing of the repair procedure of a vase which shows 1st Embodiment of this invention. It is a perspective view which shows the other defect | deletion part and addition and modeling change part of earthenware. It is a flowchart figure of the repair method of a vase which shows 1st Embodiment of this invention. It is explanatory drawing of the joining procedure of the additional part of a cup which shows 2nd Embodiment of this invention. It is a flowchart figure of the joining procedure of the additional part of a cup which shows 2nd Embodiment of this invention. It is explanatory drawing of the modeling change procedure of a flat plate which shows 3rd Embodiment of this invention. It is a flowchart figure of the shaping | molding change method of a flat plate which shows 3rd Embodiment of this invention.

Explanation of symbols

1 vase 1 'product vase 1A deficient part 2 dish 2A crack 3 part 3A dent 4 cup 4A scratch 5 cup 5 product cup 5A handle 6 three-dimensional object 6' product flat plate 6A dent 6B modeling change part 10 repair clay 10A smooth surface

Claims (3)

  A clay for pottery repair or modeling modification, characterized by mixing fiber cast, which is an indefinite fireproof heat insulating material, with clay for pottery manufacturing.   The clay for pottery repair or modeling modification according to claim 1, wherein the clay for pottery production contains 20-30% by weight of fiber cast, which is an indefinite fireproof heat insulating material, in a weight ratio. Filling or adhering or adding repair clay, which is a mixture of clay and fiber cast, an indefinite refractory heat-insulating material, to a damaged / defected part or modeling change part that occurs when clay for pottery production is dried or baked at low temperature The pottery repair or modeling change method characterized by joining the parts through repair clay and drying them.

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