Firing method for easily deformed ceramic products and auxiliary firing materials

Abstract

The present invention provides a method for firing easily deformable ceramic products and an auxiliary firing material. The method uses an auxiliary firing material in a sagger as a supporting structure to assist the firing process of easily deformable ceramic products. The auxiliary firing material is used as a supporting structure to fix and support the ceramic products during the firing process, and can effectively prevent the ceramic products from deforming at high temperatures, thereby reducing the defective rate of deformation during firing of easily deformable ceramic products. The deformation defective rate is reduced to 10%-15%, and the one-time qualified rate exceeds 60%. The finished product rate of ceramic products is significantly improved, and the waste of energy and materials in the production process is reduced; the production process is made more efficient and convenient.

Description

Technical Field

[0001] The present invention relates to the field of daily-use ceramic product firing, and mainly relates to a firing method and auxiliary firing materials for the problem of easy deformation of daily-use ceramic products during firing, and in particular to a firing method and auxiliary firing materials for easily deformed ceramic products. Background Art

[0002] There are many types of daily-use ceramics with complex shapes. During the firing process of ceramic products, the firing of easily deformed ceramic products has always been a technical problem in the industry. This is because the structure of easily deformed ceramic products is special and irregular, and they are very easy to deform during the high-temperature firing process, resulting in a very low firing rate of easily deformed daily-use ceramic products, which greatly increases the production cost of easily deformed ceramic products and poses a great challenge to the production of easily deformable ceramic products. For example, high-footed glasses or champagne glasses include a cup body and a cup foot for holding liquids, and the cup foot (including a slender neck and a base connected to the bottom of the neck) is very easy to deform (i.e., the cup body, the neck and the cup base are skewed) during the high-temperature firing process. The fired high-footed glasses or champagne glasses become defective products.

[0003] Since high-footed glasses or champagne glasses are formed from porcelain clay and then fired at high temperatures, when high-footed glasses or champagne glasses made of porcelain clay are placed in a kiln and placed on a shelf for firing, the slender neck of the cup foot is difficult to bear the weight of the cup body and will bend or break when the firing temperature changes. Therefore, for the firing production of easily deformed ceramic products such as high-footed glasses or champagne glasses, an improved firing method is proposed, which is to set a clamp ring made of the same material as the ceramic product on the upper part of the cup body of the high-footed glass body or champagne glass ceramic product, and the lower part of the cup body is placed in a sagger and filled with auxiliary firing materials. That is, a firing process method that uses auxiliary firing to support the overall structure to assist the firing of easily deformed ceramic products can effectively improve the firing quality and production efficiency of easily deformed ceramic products. In actual operation, it is generally selected and adjusted according to the specific situation to ensure the best firing effect.

[0004] First, the selection and design of the support structure: The design of the support structure should be customized according to the shape and size of the ceramic product. It should be able to provide sufficient support while avoiding excessive pressure or friction on the ceramic product to prevent cracks or deformation during the firing process;

[0005] Second, the placement and fixing method: the support structure should be placed in a suitable position on the ceramic product to ensure the stability and uniform heating of the product during the firing process. At the same time, the fixing method between the support structure and the ceramic product should be stable and reliable to avoid loosening or falling off during the firing process. Refractory clay, high-temperature adhesives and other materials can be used for fixing;

[0006] The firing rate of the volatile ceramic products can be improved by placing them in the inner cavity of the calcining box. The practical firing shows that the first pass rate of the fired products is increased from about 30% to more than 60%.

[0007] For example, CN116553810A, a Chinese patent publication, has the following invention title: "A process for making a high-heeled glass bottom using a high-borosilicate glass tube", which includes: Step 1: raw material preparation; Step 2: heating the glass tube; Step 3: vessel shaping; Step 4: vessel cooling, Step 5: excess material removal, Step 6: cup bottom shaping; Step 7: cup bottom separation; the product uses high-quality high-borosilicate glass tubes as raw materials, which have the functions of high temperature resistance and crack resistance, so that the wine glass can withstand high temperatures and is not easy to break; compared with traditional glass solution compression molding or manual production processes, the present invention has the advantages of low manufacturing cost, low operating difficulty, high production efficiency, and high product quality. However, it can be seen from the above-mentioned technical solution that it is a high-heeled glass made of glass material.

[0008] There is also application number 202210928416.4, the disclosed invention name is "An automatic bonding device and bonding method for high-heeled cup processing". The present invention belongs to the technical field of high-heeled cup processing equipment, and in particular, it relates to an automatic bonding device and bonding method for high-heeled cup processing, so as to solve the technical problem of low efficiency in the bonding process, including an upper cup body feeding assembly, a hot melt bonding assembly, a frame assembly and a lower cup body feeding assembly, wherein the upper cup body feeding assembly is mounted on the frame assembly, the hot melt bonding assembly is mounted on the frame assembly, and the lower cup body feeding assembly is mounted on the frame assembly, and the side wall rotating rod is driven to rotate by the execution motor A, and then the partition board 1 and the partition board 2 are driven to rotate by the side wall rotating rod at the same time, because the partition board 1 and the partition board 2 are separated by 180 degrees, and then the upper cup body of the high-heeled cup is discharged one by one; at the same time, the high-heeled cup that needs to be automatically bonded is added to the tapered sleeve through the upper end of the tapered sleeve. It is a high-heeled cup made by bonding, and its firing process method and device are different.

[0009] Chinese patent announcement CN1864588, the public name is "Ceramic goblet and its manufacturing method", the invention discloses a ceramic goblet and its manufacturing method, which uses a conventional ceramic manufacturing method to first make a ceramic cup body and a ceramic cup foot separately, and then glaze the connection between the ceramic cup body and the ceramic cup foot respectively, stack them together according to the required structure, and then fire them again until the glaze is completely solidified, and the ceramic cup body and the ceramic cup foot are firmly bonded together. This method of manufacturing a ceramic goblet of the invention not only overcomes the original technical prejudice of the ceramic industry, but also the method used is very simple and easy to implement, which is of great significance for the promotion of ceramic goblets.

[0010] It can be seen from the technical solutions disclosed above that they are not daily-use ceramic products, but mainly glass products, and none of them involve the technical problem of daily-use ceramic products that are easy to deform during firing, that is, how to prevent the occurrence of deformation defects during the firing process and solve the main problem of low qualified rate of easily deformed ceramic products.

[0011] Therefore, how to provide a firing method and auxiliary firing materials for easily deformed ceramic products involves many aspects of the deformation mechanism and control requirements of easily deformed ceramic products. How to effectively solve the firing problem of easily deformed ceramic products, improve the first-time qualified rate of easily deformed ceramic products, and enhance the market competitiveness of products by deeply analyzing material properties, accurately controlling firing temperature, optimizing mold design, improving firing treatment technology, strengthening quality control and testing, and continuously promoting process optimization and innovation. Summary of the invention

[0012] The purpose of the present invention is to address the deficiencies in the prior art and provide a method for firing easily deformable ceramic products and an auxiliary firing material, a firing process method using an auxiliary firing material in a sagger as a supporting structure to assist easily deformable ceramic products, and the use of the auxiliary firing material as a supporting structure plays a role of fixing and supporting during the ceramic firing process, which can effectively prevent the ceramic products from deforming at high temperatures, reduce the proportion of defective deformation of easily deformable ceramic products during firing, and reduce the deformation defect rate of easily deformable ceramic products from 50%-70% to 10%-15%, thereby significantly improving the yield of ceramic products and reducing the waste of energy and materials in the production process; making the production process more efficient and convenient.

[0013] The invention discloses a method for firing a deformable ceramic product. The method uses ceramic clay as a main raw material to prepare a preform of the deformable ceramic product. One end of the preform of the deformable ceramic product is placed on a clay support at the bottom of the inner cavity of a sagger.

[0014] 1) Before the inner cavity of the sagger, a material is arranged around the outer wall of the preform of the easily deformable ceramic product to prevent the preform of the easily deformable ceramic product from deforming during calcination and to play a supporting role and to assist in sintering;

[0015] 2) Then the sagger containing the preformed body of the easily deformable ceramic product and the auxiliary firing materials is sent into the calcining kiln device for calcining;

[0016] 3) During calcination, control the temperature changes in the kiln device, and adjust the firing temperature and time as needed to maintain uniform calcination of easily deformed ceramic products and check the deformation of ceramic products.

[0017] In the method for firing a deformable ceramic product, the auxiliary firing material is a refractory mixture that is incompatible with the raw material of ceramic clay for preparing a primary body of the deformable ceramic product during calcination and has high heat transfer performance; the particle size of the auxiliary firing material is controlled to be 30-60 mesh accounting for 65-75%, and 60-100 mesh accounting for 25-35%.

[0018] In the method for firing a deformable ceramic product, the auxiliary firing material is a refractory mixture with high heat transfer performance, and the composition ratio of each component of the refractory mixture is controlled as follows:

[0019] SiO 2 :97-98%,Fe 2 O 3 :0.065-0.075%,Al 2 O 3 :1.15-1.21%, TiO: 0.02%, CaO: 0.01-0.013%, MgO: 0.11-0.13%, K 2 O:0.4-0.5,Na 2 O:0.01,Li.:0.28%.

[0020] The method for firing a deformable ceramic product controls the height of the auxiliary firing material in the inner cavity of the sagger to be between 1 / 2 and 2 / 3 of the height of the primary body of the deformable ceramic product or to be equal to the height of the primary body of the deformable ceramic product.

[0021] In the method for firing a deformable ceramic product, the clay base is prepared by mixing ceramic clay and auxiliary firing materials, and the mass ratio of ceramic clay to auxiliary firing materials is controlled to be 40-45:55-60.

[0022] The method for firing a deformable ceramic product controls the shape and size of the clay tray to be equal to or larger than the shape and size of the bottom end of the deformable ceramic product blank, and controls the vertical height of the clay tray to be less than or equal to 15 mm.

[0023] The method for firing a deformable ceramic product, wherein step 3) is to control the firing temperature to 1280-1290°C and the time to 550-600 minutes; and to keep the deformable ceramic preform body stably and evenly heated; and to control the heating rate during calcination to 3-5°C / min.

[0024] The invention discloses a method for firing deformable ceramic products, which has the advantages and beneficial effects of using the above method and auxiliary firing materials, that is, filling the inner cavity of the sagger with the auxiliary firing materials, and using the auxiliary firing materials to act as a heating medium for the deformable ceramic products during sintering, so that the deformable ceramic products are heated more evenly when calcined in the kiln, and the deformable ceramic products being sintered are not easy to deform and break, such as the champagne glass or goblet described in the embodiment of the invention, especially the neck thereof is not easy to deform and break, and the deformation defect rate of the deformable ceramic products is reduced from 50%-70% in the prior art to 10%-15% in the method of the invention, such as the one-time firing qualified rate of goblets or champagne glass-like ceramic products is increased to more than 60%, which greatly improves the finished product rate of the deformable ceramic products and greatly reduces the production cost of preparing goblets or champagne glass-like ceramic products. At the same time, the present invention adopts a one-time forming production process, while the prior art adopts a method of separately firing the cup body and the lower cup foot, then bonding them and then calcining them in order to prevent the cup foot, i.e., the cup neck, from breaking or being skewed during firing. However, such a preparation process is complicated and the preparation cost is higher. Moreover, there is also the phenomenon of improper bonding or skewness, so the qualified rate of the finished product is not very high. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 , is a schematic diagram of a structure of preparing a deformable ceramic goblet or champagne glass according to an embodiment of the present invention,

[0026] Figure 2 , is a schematic diagram of a comparative example 1 in which a cup body mold 3' is provided on the outer periphery of the champagne cup body; the champagne cup body mold 3' is placed in a kiln for calcination;

[0027] Figure 1 Among them, 1. cup body, 2. auxiliary firing material, i.e. refractory mixture, 3. sagger body, 4. clay tray, 5. cup neck, 6. cup base;

[0028] Figure 2 In the middle, 1', cup body, 2', snap ring, 3', cup body mold, 4', ceramic clay base. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with specific embodiments:

[0030] The following examples will help to further understand the present invention, but do not limit the content of the present invention.

[0031] like Figure 1 As shown, the present invention discloses a method for firing a deformable ceramic product, using ceramic clay as the main raw material to prepare a deformable ceramic product preform, and placing one end of the deformable ceramic product preform on a clay tray at the bottom of the inner cavity of a sagger body 3, wherein the deformable ceramic product is fired using the following method steps:

[0032] 1) An auxiliary firing material 2 is provided on the outer wall of the deformable ceramic product preform before the sagger body cavity to prevent the deformation of the deformable ceramic product preform during calcination and to play a supporting role; the auxiliary firing material 2 is a refractory material that is incompatible with the ceramic clay raw material for preparing the deformable ceramic product preform during calcination; the particle size of the auxiliary firing material 2 is controlled to be 30-60 mesh accounting for 65-75%, and 60-100 mesh accounting for 25-35%;

[0033] Preferably, the auxiliary sintering material 2 is a refractory mixture having the following components:

[0034] SiO 2 :97-98%,Fe 2 O 3 :0.065-0.075%,Al 2 O 3 : 1.15-1.21%, TiO: 0.02%, CaO: 0.01-0.013%, MgO: 0.11-0.13%, K 2 O: 0.4-0.5, Na 2 O: 0.01, Li.: 0.28%;

[0035] Preferably, the height of the auxiliary sintering material 2 arranged in the inner cavity of the sagger body 3 is controlled to be between 1 / 2 and 2 / 3 of the height of the preform of the easily deformable ceramic product or equal to the height of the preform of the easily deformable ceramic product;

[0036] 2) Then the sagger body 3 containing the deformable ceramic product green body and the auxiliary sintering material 2 is sent into the calcining kiln device for calcining;

[0037] 3) During calcination, control the temperature change in the kiln device during calcination, and adjust the firing temperature and time as needed; control the firing temperature to 1280-1290℃, the time to 550-600 minutes; control the heating rate during calcination to 3-5℃ / min. That is to say, the heating rate should not be too fast, that is, the deformable ceramic preform can be heated stably and evenly; maintain the uniform calcination of the deformable ceramic products and check the deformation of the ceramic products.

[0038] The method for firing the easily deformable ceramic product is preferably to control the height of the auxiliary firing material 2 arranged in the inner cavity of the sagger body 3 to be between 1 / 2 and 2 / 3 of the height of the primary body of the easily deformable ceramic product.

[0039] Preferably, the mud tray 4 is prepared by mixing ceramic clay and auxiliary firing materials, and the mass ratio of ceramic clay and auxiliary firing materials is controlled to be 40-45:55-60. The mud tray 4 is prepared by mixing ceramic clay and auxiliary firing materials in the above ratio, mainly to prevent the cup base 6 of the deformable ceramic product from sintering and sticking under high temperature conditions after contacting the mud tray 4, resulting in defects in the fired product of the deformable ceramic product. It has been proved through actual use that the mud tray 4 made of the above composite material greatly reduces the occurrence of the above situation. The above-mentioned adhesion situation often occurs in the mud tray 4 prepared with raw materials of the prior art, resulting in defective products.

[0040] The method for firing a deformable ceramic product controls the shape and size of the clay tray to be equal to or larger than the shape and size of the bottom end of the deformable ceramic product blank, and controls the vertical height of the clay tray to be less than or equal to 15 mm. Example

[0041] The following embodiment 1 discloses a method for firing a deformable ceramic product and an auxiliary firing material of the present invention. The deformable ceramic product prepared is a high-footed glass or a champagne glass. The parts not described in the following embodiment are the same as the above description. The upper, lower, left, right, etc. described in the present invention are all relative to the structure disclosed in the drawings of the present invention specification.

[0042] The method for firing a deformable ceramic product and the auxiliary firing material disclosed in Example 1 of the present invention are described by taking the preparation of a 220ml ceramic goblet or champagne glass as an example.

[0043] like Figure 1 As shown, the sintering method and auxiliary sintering materials of the easily deformable ceramic product prepared in Example 1 of the present invention are champagne glasses. The champagne glass product adopts the conventional production process of the prior art to obtain an easily deformable ceramic product preform, that is, a champagne glass preform (the same below). The base 6 end of the easily deformable ceramic product preform, that is, the champagne glass preform, is placed on the clay tray 4 at the bottom of the inner cavity of the sagger body 3. The sintering is performed by the following method steps:

[0044] 1) The prepared champagne glass blank is placed on the clay tray 4 at the bottom of the inner cavity of the sagger body 3, and the clay tray 4 is arranged at the bottom center of the sagger body 3. The cup base 6 of the champagne glass blank is placed on the upper surface of the clay tray 4. Then, an auxiliary firing material 2 is arranged around the outer wall of the champagne glass blank in the inner cavity of the sagger body 3 to prevent the champagne glass blank from deforming during calcination and to play a supporting role. The auxiliary firing material 2 is a refractory mixture that is incompatible with the ceramic clay raw material for preparing the easily deformable ceramic product blank during calcination and is easy to conduct heat. The particle size of the auxiliary firing material 2 is controlled to be 70% of 30-60 mesh and 30% of 60-100 mesh;

[0045] The auxiliary sintering material 2 is a refractory mixture with the following components:

[0046] SiO 2 :97.46%,Fe 2 O 3 :0.07%,Al 2 O 3 : 1.19%, TiO: 0.02%, CaO: 0.01%, MgO: 0.12%, K 2 O: 0.45, Na 2 O: 0.01, Li.: 0.28%, the balance is others; refers to impurity materials other than the above materials, about a few tenths of a percent, and does not affect the performance of the auxiliary sintering material 2.

[0047] The vertical height of the auxiliary sintering material 2 in the inner cavity of the sagger body 3 is controlled to be 1 / 2 of the height of the deformable ceramic product preform, i.e., the champagne glass. At the same time, the auxiliary sintering material 2 is controlled to be stacked from the top of the champagne glass neck 5 to the corresponding part of the glass body 1. In actual operation, the best height is about one-third of the glass body 1.

[0048] 2) Then, the sagger body 3 containing the deformable ceramic product preform, i.e., the champagne glass preform, and the auxiliary sintering material 2 are sent together into the calcining kiln device for calcining;

[0049] 3) During calcination, control the temperature change in the kiln device during calcination, and adjust the calcination temperature and time as needed; in this embodiment, the calcination temperature is controlled to be 1280-1290°C and the time is 600 minutes; during calcination, the calcination temperature heating rate is controlled to be 3-5 degrees / min, and the deformable ceramic preform body is kept to be stably and evenly heated. Maintain uniform calcination of the deformable ceramic product and check the deformation of the ceramic product, i.e., the champagne glass;

[0050] At the same time, the clay holder 4 is prepared by mixing ceramic clay and auxiliary firing material 2, and the mass ratio of ceramic clay to auxiliary firing material 2 is controlled to be 40:60. The clay holder 4 is prepared by mixing ceramic clay and auxiliary firing material 2 in the above ratio, mainly to prevent the cup base 6 of the easily deformed ceramic product from contacting the clay holder 4, and then sintering and sticking due to high temperature conditions, resulting in the firing product defects of the easily deformed ceramic product on the clay holder 4, i.e., the champagne glass. It has been proved through actual use that the clay holder 4 made of the above composite material greatly reduces the occurrence of the above situation. The above-mentioned adhesion of the clay tray 4 prepared from the original raw materials of the prior art sometimes occurs, although not often, but it still occurs, resulting in defective champagne flutes; and the shape and size of the clay tray 4 is controlled to be equal to or slightly larger than the cup base 6 of the bottom end of the deformable ceramic product preform, and the vertical height of the clay tray 4 is controlled to be 15 mm; this ensures that the auxiliary firing material 2 can fully and evenly transfer heat to the cup base 6 when in the kiln, and reduces the deformation defect rate of the deformable ceramic product from 50%-70% to 10%-15%, thereby ensuring that the firing quality pass rate of the champagne flute is as high as 60% or more. The product yield rate is significantly improved. The firing method of the champagne flute disclosed in the present invention adopts the refractory mixture of the above-mentioned components as the auxiliary firing material, and utilizes the property that the refractory mixture is not easily fused with the ceramic clay raw material for preparing the champagne flute blank during the high-temperature calcination process, so that the high-temperature heat generated in the kiln during the calcination process can be gently, evenly and effectively transferred to the champagne flute blank, so that the champagne flute to be fired is heated evenly, and at the same time, the auxiliary firing material 2 is stacked around the outer wall surface of the champagne flute body to support the cup neck 5 of the champagne flute, so that the weight of the cup body 1 is not completely pressed on the cup neck 5 during calcination, because the cup neck 5 is mainly increased with the change of temperature during calcination, and its ability to bear weight is correspondingly reduced. As a result, the champagne glass blank often breaks and skews during calcination. The method of the present invention thus greatly ensures that during the firing process of the champagne glass blank, due to the influence of high-temperature calcination, the cup neck 5 is either broken or skewed during the original firing process, which is the main reason for the low firing yield of easily deformed ceramic products. After the present invention adopts the above method and auxiliary firing materials, it is not easy to deform during firing, and the deformation defect rate of easily deformable ceramic products is reduced from 50%-70% to 10%-15%, thereby ensuring that the one-time firing qualified rate of ceramic products such as high-foot glasses or champagne glasses is increased to more than 60%.

[0051] The quality of the champagne glasses prepared by calcining the above-mentioned easily deformable ceramic product sintering method and auxiliary sintering materials disclosed in the present invention is as follows after being tested by relevant departments:

[0052] The inspection standard is the national standard of the People's Republic of China. The deformation size is in accordance with GB / T3300-2008, and the defect size is in accordance with GB / T3301, the deformation inspection method for daily-use ceramics.

[0053] Deformation height mm: superior product, not more than 0.5,

[0054] Product Specifications Small

[0055] The following is a physical and chemical test report of a champagne glass product with a firing specification of 220 ml prepared by the present invention company using the present invention method and auxiliary firing materials.

[0056] Sample name, Hongyun 220ml champagne glass, product number, 20240305,

[0057] Sample quantity, 15 pieces,

[0058] Test items, deformation of ceramic products,

[0059] Testing standards, according to GBT3532-2022 daily-use porcelain,

[0060] The test method refers to GBT3532-2008, the test method for deformation of daily-use ceramics.

[0061] The test results are shown in Table 1.

[0062]

[0063] It can be seen from the above test report that the unqualified rate of the products fired by the method and auxiliary firing materials of the present invention is only about 13.3%. The neck 5 of the fired champagne glass does not break. The product yield of the champagne glass is greatly improved, and the production cost of the product is lower.

[0064] The easily deformable ceramic product to be prepared in this comparative example 1 is still the same as the firing of the 220 mm champagne glass in example 1. It adopts the existing technical solution. The clasp 1' and the cup body mold 3' made of the same ceramic clay as the raw material for preparing the champagne glass are sleeved on the corresponding position of the cup body 1' of the champagne glass body. Figure 2 As shown, the calcined product is then sent into a calcining kiln for calcination. The calcination temperature and process method are carried out according to the existing technical scheme, such as the calcination temperature is about 1200 degrees.

[0065] like Figure 2As shown, the method of using the supporting structure, i.e., the cup body mold 3' and the clamping ring 2', as auxiliary firing methods for easily deformed ceramic products is a method in the prior art that can effectively improve the firing quality and production efficiency of easily deformed ceramic products. In actual operation, selection and adjustment are made according to specific circumstances to ensure the best firing effect.

[0066] Selection and design of support structure: The design of the support structure, such as the cup body mold 3' and the clamp ring 2', is customized according to the shape and size of the ceramic champagne glass, and can provide sufficient support while avoiding excessive pressure or friction on the ceramic product to prevent cracks or deformation of the product during the firing process.

[0067] Placement and fixing method: The support structure should be placed in the appropriate position of the ceramic product to ensure the stability and uniform heating of the product during the firing process. At the same time, the fixing method between the support structure and the ceramic product should be stable and reliable to avoid loosening or falling off during the firing process. Temperature monitoring and deformation monitoring: During the firing process, pay close attention to the temperature changes in the kiln, and adjust the firing temperature and time as needed to ensure the uniform firing of the ceramic product. Regularly check the deformation of the ceramic product. If a deformation trend is found, adjust the support structure in time or take other measures to correct it. Although the existing technical solution adopts the above measures and methods, the champagne cup prepared by the above calcination method has a product deformation defect rate of 50%-70%. The main reason is that the cup neck is skewed or broken during the firing process, and a very small part of it appears in the base of the champagne cup and the ceramic clay tray 4' because it is made of the same raw material as the cup body, a small part of the adhesion occurs during the high-temperature calcination process, which also causes a reduction in the first-time qualified rate.

[0068] The physical and chemical test report of the Hongyun 220ml champagne glass of the same specifications prepared in this comparative example 1 is shown in Table 2 below. The test method and test standard are the same as those in Example 1.

[0069] Table 2,

[0070]

[0071] It can be seen from the above test report results that the unqualified rate of products fired by the method and auxiliary firing materials of the present invention is about 60%.

[0072] The method and auxiliary sintering material of the present invention can reduce the product deformation defect rate to 10%-15%, significantly improving the product yield rate.

[0073] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for firing a deformable ceramic product, using ceramic clay as the main raw material to prepare a deformable ceramic product preform, placing one end of the deformable ceramic product preform on a clay tray at the bottom of the inner cavity of a sagger, Its characteristics are: 1) Before the inner cavity of the sagger, a material is arranged around the outer wall of the preform of the easily deformable ceramic product to prevent the preform of the easily deformable ceramic product from deforming during calcination and to play a supporting role and to assist in sintering; 2) Then the sagger containing the preformed body of the easily deformable ceramic product and the auxiliary firing materials is sent into the calcining kiln device for calcining; 3) During calcination, control the temperature change in the kiln device during calcination, and adjust the firing temperature and time as needed to maintain uniform calcination of easily deformed ceramic products and check the deformation of ceramic products; The auxiliary firing material is a refractory mixture that is incompatible with the raw material of the ceramic clay for preparing the primary body of the easily deformable ceramic product during calcination and has high heat transfer performance; the particle size of the auxiliary firing material is controlled to be 30-60 mesh accounting for 65-75%, and 60-100 mesh accounting for 25-35%; The auxiliary sintering material is a refractory mixture with high heat transfer performance, and the composition ratio of each component of the refractory mixture is controlled as follows: SiO2:97-98%, Fe2O3:0.065-0.075%, Al2O3:1.15-1.21%, TiO:0.02%, CaO:0.01-0.013%, MgO:0.11-0.13%, K2O:0.4-0.5, Na2O:0.01, Li:0.28%; The height of the auxiliary firing material in the inner cavity of the sagger is controlled to be between 1 / 2 and 2 / 3 of the height of the primary body of the easily deformable ceramic product; The easily deformable ceramic product is a goblet or a champagne glass; The clay tray is prepared by mixing ceramic clay and auxiliary firing materials, and the mass ratio of ceramic clay to auxiliary firing materials is controlled to be 40-45:55-60; At the same time, the vertical height of the mud support is controlled to be less than or equal to 15 mm.

2. A method for firing a deformable ceramic product according to claim 1, characterized in that The shape and size of the clay tray is controlled to be equal to or larger than the shape and size of the bottom end of the preform of the easily deformable ceramic product.

3. A method for firing a deformable ceramic product according to claim 1, characterized in that step 3) is to control the calcination temperature during firing to 1280-1290°C and the time to 550-600 minutes; and to keep the deformable ceramic preform body stably and evenly heated; and to control the heating rate during calcination to 3-5°C / min.

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