Saggar equipped with two-dimensional code and method for affixing two-dimensional code to saggar

Abstract

[Problem] The present invention addresses the problem of providing: a saggar equipped with a two-dimensional code in which the two-dimensional code can be read, the occurrence of defective products can be reduced, and mass production is facilitated; and a method for affixing a two-dimensional code to a saggar. [Solution] A saggar 1 equipped with a two-dimensional code according to the present invention has: a base material layer 3 for ceramic label adhesion, the base material layer 3 being formed on a required portion of a saggar body 2; and a ceramic label 4 equipped with a two-dimensional code, the ceramic label 4 being fixed to the surface of the base material layer 3 for ceramic label adhesion.

Description

Ceramic Pot with Two-Dimensional Code and Method for Attaching Two-Dimensional Code to Ceramic Pot

[0001] The present invention relates to a ceramic pot with a two-dimensional code and a method for attaching the two-dimensional code to the ceramic pot.

[0002] Conventionally, in order to manage individuals, two-dimensional codes (for example, QR codes (registered trademarks), barcodes, data matrices, etc.) have been attached to products. However, it has been difficult to attach these two-dimensional codes in a readable manner to ceramic pots (containers for firing ceramic fired bodies) that are used at high temperatures, and thus they have not been used.

[0003] On the other hand, regarding the individual management of ceramic pots, there have been proposed an identification structure for a firing ceramic pot (Japanese Patent Laid-Open No. 6-94375) that forms a cut groove constituting an identification code at a predetermined part of the ceramic pot, and an identification structure for a firing ceramic pot (Japanese Patent Laid-Open No. 6-42884) that forms an anti-reaction base film mainly composed of zirconia on at least the identification formation surface of the ceramic pot body made of ceramic and forms an identification label mainly composed of iron oxide powder with a purity of 90% or more on the base film.

[0004] However, when firing with a two-dimensional code attached to the ceramic pot, as shown in FIG. 7, the two-dimensional code is warped due to the unevenness of the surface of the ceramic pot body, or as shown in FIG. 8, air intrudes into the gap due to insufficient adhesion between the two-dimensional code and the surface of the ceramic pot body, causing the rupture of bubbles, or as shown in FIG. 9, the two-dimensional code is dissolved due to poor penetration to the surface of the ceramic pot body, resulting in a large number of unreadable defective products. Also, there was a problem that mass production was difficult with the identification structures of the firing ceramic pots disclosed in Japanese Patent Laid-Open No. 6-94375 and Japanese Patent Laid-Open No. 6-42884.

[0005] Japanese Patent Laid-Open No. 6-94375, Japanese Patent Laid-Open No. 6-42884

[0006] Therefore, an object of the present invention is to provide a ceramic pot with a two-dimensional code and a method for attaching the two-dimensional code to the ceramic pot, in which the two-dimensional code is readable, the generation of defective products can be reduced, and mass production is easy.

[0007] The solution to the above problem is a saggar with a two-dimensional code, characterized by having a base material layer for ceramic label adhesion formed on a required part of the saggar body, and a ceramic label with a two-dimensional code fixed to the surface of the base material layer for ceramic label adhesion (Claim 1).

[0008] The ceramic label adhesion base material constituting the ceramic label adhesion base material layer is preferably formed by adding a binder to a mixed powder containing 5 to 40% by weight of alumina powder, 5 to 20% by weight of silica powder, 0 to 70% by weight of spinel powder, and 5 to 30% by weight of cordierite powder to form a slurry (Claim 2).

[0009] Furthermore, a method for attaching a two-dimensional code to a saggar that solves the above problems is characterized by comprising a surface treatment step of forming a base material layer for ceramic label adhesion on a required part of the saggar body, a label attachment step of attaching a ceramic label with a two-dimensional code to the surface of the base material layer for ceramic label adhesion, and a firing step of firing the saggar body to which the ceramic label with the two-dimensional code has been attached to fix the ceramic label with the two-dimensional code to the saggar body (Claim 3).

[0010] The ceramic label adhesion base material constituting the ceramic label adhesion base material layer is preferably formed by adding a binder to a mixed powder containing 5 to 40% by weight of alumina powder, 5 to 20% by weight of silica powder, 0 to 70% by weight of spinel powder, and 5 to 30% by weight of cordierite powder to form a slurry (Claim 4).

[0011] The two-dimensional code attached sagger described in claim 1 allows the two-dimensional code to be readable, reduces the occurrence of defective products, and facilitates mass production. The two-dimensional code attached sagger described in claim 2 allows for the construction of a ceramic label adhesion base material layer that has higher adhesion to the two-dimensional code and can form a smoother surface between the two-dimensional code and the base material layer. The method for attaching a two-dimensional code to a sagger described in claim 3 allows for the two-dimensional code to be attached in a readable manner, reduces the occurrence of defective products, and facilitates mass production. The method for attaching a two-dimensional code to a sagger described in claim 4 allows for the construction of a ceramic label adhesion base material layer that has higher adhesion to the two-dimensional code and can form a smoother surface between the two-dimensional code and the base material layer layer.

[0012] This is a partial cross-sectional view of one embodiment of the two-dimensional code-attached sagger of the present invention. This is a front view photograph of one embodiment of the two-dimensional code-attached sagger of the present invention. This is a magnified photograph of the two-dimensional code (QR code (registered trademark) portion) of the two-dimensional code-attached sagger shown in Figure 2. This is a manufacturing process chart of one embodiment of the method for attaching a two-dimensional code to a sagger of the present invention. This is a table for explaining the defect rate of the two-dimensional code-attached sagger of the embodiment. This is a table for explaining the defect rate of the two-dimensional code-attached sagger of the comparative example. This is a photograph for explaining an example of a defect in the two-dimensional code-attached sagger. This is a photograph for explaining another example of a defect in the two-dimensional code-attached sagger. This is a photograph for explaining another example of a defect in the two-dimensional code-attached sagger.

[0013] In this invention, the two-dimensional code-equipped saggar 1 has a ceramic label adhesion base material layer 3 formed on a required part of the saggar body 2, and a two-dimensional code-equipped ceramic label 4 fixed to the surface of the ceramic label adhesion base material layer 3. As a result, the two-dimensional code is readable, the occurrence of defective products can be reduced, and a method for attaching a two-dimensional code to the saggar has been realized.

[0014] The present invention will be described using an embodiment shown in Figures 1 to 5, which includes a saggar with a two-dimensional code and a method for attaching a two-dimensional code to the saggar. As shown in Figure 1, the saggar 1 with a two-dimensional code in this embodiment has a ceramic label adhesion base layer 3 formed on a required part of the saggar body 2, and a ceramic label 4 with a two-dimensional code fixed to the surface of the ceramic label adhesion base layer 3. Each component will be described in detail below.

[0015] The ceramic label adhesion base layer 3 is provided to improve the adhesion of the ceramic label 4 with a two-dimensional code, and in this embodiment, as shown in Figure 2, it is formed on the required part of the sagger body 2 (a bottomed rectangular cylindrical body with an open top) (the front side wall surface of the sagger body 2). However, the part on which the ceramic label adhesion base layer is provided is not limited to the front side wall surface of the sagger body 2, but can be any part of the surface of the sagger body 2.

[0016] The ceramic label adhesion base material that constitutes the ceramic label adhesion base material layer 3 uses a material that improves adhesion between it and the ceramic label 4 with a two-dimensional code. By applying the ceramic label adhesion base material, the unevenness of the surface of the saggar body 2 is corrected, preventing the two-dimensional code from peeling off due to the unevenness (Figure 7), preventing air from entering the gap and causing bubbles to burst due to insufficient adhesion between the two-dimensional code and the surface of the saggar body 2 (Figure 8), and further preventing the two-dimensional code from dissolving due to poor penetration into the surface of the saggar body 2 (Figure 9), thus enabling reading.

[0017] As a base material for ceramic label adhesion, a mixture of powders containing 5-40% by weight of alumina powder, 5-20% by weight of silica powder, 0-70% by weight of spinel powder, and 5-30% by weight of cordierite powder, to which a binder is added to form a slurry, is preferably used.

[0018] In the above mixed powder, alumina powder is added to improve heat resistance. If the alumina powder content is less than 5% by weight, the heat resistance will be insufficient, and if it exceeds 40% by weight, the melting of the substrate will be suppressed, rendering it ineffective as a substrate material.

[0019] Silica powder is added to provide adhesion and smooth the surface; if the silica powder content is less than 5% by weight, adhesion will be insufficient, and if it exceeds 20% by weight, the smoothness will decrease.

[0020] Spinel powder is added to suppress the penetration of printed materials, and if the amount of spinel powder exceeds 70% by weight, the melting of the substrate is suppressed, rendering the substrate ineffective.

[0021] Cordillerine powder is added for its heat spalling resistance; if the amount of cordillerine powder is less than 5% by weight, the heat spalling resistance will be insufficient, and if it exceeds 30% by weight, the density will decrease.

[0022] The above mixed powder may be newly formulated, or the dried and ground product or the calcined and ground product used during the manufacture of the saggars may be used. Furthermore, a CMC solution can be suitably used as a binder. In addition, dilute hydrochloric acid may be added to prevent separation of solids and liquids in the slurry.

[0023] The ceramic label 4 with a two-dimensional code is a ceramic label having a two-dimensional code for attaching the two-dimensional code to the saggar body 2. Any two-dimensional identification display that enables individual management of the saggar body 2 can be used as the two-dimensional code, but combinations of QR codes (registered trademark), data matrices, barcodes, numbers, letters, etc. are preferably used.

[0024] The ceramic label 4 with a two-dimensional code is attached to the surface of the ceramic label adhesion base material layer 3 and then fired, thereby fixing it to the surface of the ceramic label adhesion base material layer 3 as shown in Figures 1 to 3. As a result, the saggar 1 with a two-dimensional code in this embodiment has a readable two-dimensional code, reduces the occurrence of defective products, and is easy to mass-produce.

[0025] Next, the method for attaching a two-dimensional code to a sagger according to the present invention will be explained using an embodiment shown in Figures 1 to 4. The method for attaching a two-dimensional code to a sagger 1 in this embodiment includes a surface preparation step of forming a ceramic label adhesion base material layer 3 on the required parts of the sagger body 2, a label attachment step of attaching a ceramic label 4 with a two-dimensional code to the surface of the ceramic label adhesion base material layer 3, and a firing step of firing the sagger body 2 with the ceramic label 4 with the two-dimensional code attached to fix the ceramic label 4 with the two-dimensional code to the sagger body 2. Each step will be described in detail below.

[0026] The method for attaching the two-dimensional code to the saggar 1 in this embodiment is performed after the drying process during the manufacturing process of the saggar shown in Figure 4. However, the method for attaching the two-dimensional code to the saggar of the present invention is not limited to this, and methods performed after the firing process of the saggar itself, and after the surface treatment process and label application process, firing with a gas burner or the like, are also included in the scope of the present invention.

[0027] In the surface preparation step for forming a ceramic label adhesion base layer 3 on the required parts of the saggar body 2, as shown in Figure 1 or Figure 2, the ceramic label adhesion base material is applied to the required parts of the saggar body 2 (the front side wall surface of the saggar body 2) to form a smooth surface and perform the surface preparation.

[0028] As a base material for ceramic label adhesion, a mixture of powders containing 5-40% by weight of alumina powder, 5-20% by weight of silica powder, 0-70% by weight of spinel powder, and 5-30% by weight of cordierite powder, to which a binder is added to form a slurry, is preferably used.

[0029] In the label application process, a ceramic label 4 with a two-dimensional code is applied to the surface of a ceramic label adhesion base material layer 3. The ceramic label 4 is applied to the surface of the slurry-like ceramic label adhesion base material layer 3.

[0030] The ceramic label 4 with a two-dimensional code is a ceramic label having a two-dimensional code for attaching the two-dimensional code to the saggar body 2. Any two-dimensional identification display that enables individual management of the saggar body 2 can be used as the two-dimensional code, and suitable examples include QR codes (registered trademark), data matrices, barcodes, combinations of numbers and letters, etc. In this embodiment, as shown in Figure 2, a combination of a QR code (registered trademark) and numbers is used.

[0031] In the firing process, which involves firing the sagger body 2 to which the ceramic label 4 with a two-dimensional code is attached, the sagger body 2 with the ceramic label 4 attached is placed in the furnace and fired at a firing temperature of 1000°C or higher for 9 to 18 hours. As a result, the ceramic label 4 with the two-dimensional code is fired together with the sagger body 2, the ceramic label 4 with the two-dimensional code is fixed to the sagger body 2, the two-dimensional code becomes readable, the occurrence of defective products can be reduced, and the sagger body 1 with a two-dimensional code can be easily mass-produced.

[0032] (Defect Rate Comparison Test) (Example) A ceramic label adhesion base layer 3 was formed on a saggar molded product by surface treatment using a slurry prepared by adding a binder (CMC solution) and dilute hydrochloric acid to a mixed powder containing 20% ​​by weight of alumina powder, 12.5% ​​by weight of silica powder, 50% by weight of spinel powder, and 15% by weight of cordierite powder, as a base material for ceramic label adhesion. A ceramic label 4 with a two-dimensional code (ceramic label manufactured by Sigmax Co., Ltd.: CeraLabel®) was attached to the surface, and the product was placed in a furnace and fired at a firing temperature of 1000°C or higher for 18 hours to produce the example. In this case, a QR code® (error correction level H) was used as the two-dimensional code, and products that could not be read by a QR reader® or that took more than 5 seconds to read were considered defective.

[0033] (Comparative Example) On the other hand, a comparative example was prepared by following the same process as the example, except that the surface treatment process of forming a ceramic label adhesion base material layer 3 on the required parts of the saggar body 2 was not performed.

[0034] (Test Results and Discussion) As shown in Figure 5, out of 3,779 examples, 94 could not read the two-dimensional code, resulting in a defect rate of 2.5%.

[0035] On the other hand, as shown in Figure 6, in the comparative example where the surface treatment process was not performed, in the first test, 55 out of 199 comparative examples could not read the two-dimensional code, resulting in a defect rate of 27.6%. In the second test, 35 out of 134 comparative examples could not read the two-dimensional code, resulting in a defect rate of 26.1%.

[0036] (Discussion) From the results of the above defect rate comparison test, the defect rate of the sagger having a ceramic label adhesion base material layer or the sagger manufactured through a surface treatment process to form the ceramic label adhesion base material layer (Example) was less than 1 / 10 of that of the sagger without the ceramic label adhesion base material layer 3 or the sagger manufactured without the surface treatment process to form the ceramic label adhesion base material layer (Comparative Example). As a result, it was confirmed that the two-dimensional code in the Example was more readable than in the Comparative Example, and that the occurrence of defective products was significantly reduced.

[0037] 1. Sagger with QR code 2. Sagger body 3. Base material layer for ceramic label adhesion 4. Ceramic label with QR code

Claims

1. A saggar with a two-dimensional code, characterized by having a base layer for ceramic label adhesion formed on a required part of the saggar body, and a ceramic label with a two-dimensional code fixed to the surface of the base layer for ceramic label adhesion.

2. The ceramic label adhesion base material constituting the ceramic label adhesion base material layer is formed by adding a binder to a mixed powder containing 5 to 40% by weight of alumina powder, 5 to 20% by weight of silica powder, 0 to 70% by weight of spinel powder, and 5 to 30% by weight of cordierite powder to form a slurry, as described in claim 1.

3. A method for attaching a two-dimensional code to a saggar, characterized by comprising: a surface treatment step of forming a base material layer for ceramic label adhesion on a required part of the saggar body; a label application step of attaching a ceramic label with a two-dimensional code to the surface of the base material layer for ceramic label adhesion; and a firing step of firing the saggar body to which the ceramic label with the two-dimensional code has been attached to fix the ceramic label with the two-dimensional code to the saggar body.

4. The method for attaching a two-dimensional code to a sagger according to claim 3, wherein the ceramic label adhesion base material constituting the ceramic label adhesion base material layer is formed by adding a binder to a mixed powder containing 5 to 40% by weight of alumina powder, 5 to 20% by weight of silica powder, 0 to 70% by weight of spinel powder, and 5 to 30% by weight of cordierite powder to form a slurry.

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