Ceramic stack burning anti-deformation device

Abstract

The utility model discloses a ceramic stack burning anti-deformation device which comprises a first jig blank and a second jig blank, the second jig blank is stacked at the upper end of the first jig blank, and the first jig blank and the second jig blank are both used for containing ceramic shell blanks. And an anti-deformation base plate is mounted between the first jig and the second jig. According to the device, a flat and stable stacking platform is formed between a first jig blank and a second jig blank through an anti-deformation base plate, the second jig blank is stably supported, the first jig blank creeps at the high temperature and collapses downwards under the action of the gravity, and the first jig blank is separated from the second jig blank. The second jig blank on the anti-deformation base plate can still keep the original horizontal state, the second lower jig blank can effectively limit the shape of the small-diameter ceramic shell blank, the shape and the size of the fired small-diameter ceramic shell meet the product standard, the production efficiency and the yield are improved, and the production cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ceramic sintering equipment, in particular to a ceramic stacking and firing anti-deformation device. Background Art

[0002] Alumina ceramic shells are widely used in various structural parts such as pipelines, fuse shells, vacuum interrupter shells, etc. with special requirements. The ceramic shell is prepared by firing, and the firing process is actually to densify the ceramic shell blanks and prepare them into alumina ceramic shells. In this process, the ceramic shell blanks will shrink in volume, and their shape and size will change greatly. In the process of preparing the cylindrical alumina ceramic shell, in order to control the shape and size of the cylindrical alumina ceramic shell, the end face of the ceramic shell blank will be made of a jig blank of the same material as an auxiliary tool, and fired together with the alumina ceramic shell blank to ensure the shape and size of the ceramic shell. Since alumina ceramic shells have various sizes, during the firing process, a single piece is fired independently. In the mass production process of ceramic shells, although the yield of a single piece is high, the cost of firing is high and the economic benefit is low. Therefore, the method of single piece independent firing is not suitable for factory-based ceramic shell preparation; while multi-piece stacking firing can fire ceramic shells in the same batch, with low cost, and is widely used. This stacking firing method can not only be used for the firing of the same type of ceramic shell products, but also for the stacking firing of multiple pieces of different types of ceramic shell products, that is, multiple ceramic shell blanks of different diameters are stacked in two layers in the firing equipment according to the size of the diameter of the ceramic shell blanks, with the small diameter ceramic shell blanks placed on the upper layer and the large diameter ceramic shell blanks placed on the upper layer, and fired at the same time. The firing efficiency is improved and the firing cost is reduced; however, during the firing process, when a small diameter porcelain shell blank is stacked on top of a large diameter porcelain shell blank, at the firing temperature, that is, when the temperature reaches 1700°C, the jig installed on the upper end of the large diameter porcelain shell will creep at the high temperature, and under the action of its own gravity, it will collapse downward, thereby causing the jig installed on the lower end of the small diameter porcelain shell stacked on it to deform as the jig installed on the upper end of the large diameter porcelain shell deforms, causing the jig installed on the lower end face of the upper small diameter porcelain shell to be severely deformed, thereby losing the limiting and limiting effect on the lower end face of the upper small diameter porcelain shell, resulting in the outer dimensions of the upper small diameter porcelain shell being uncontrolled and unexpected deformation, resulting in the outer structure of the small diameter porcelain shell being unqualified. Utility Model Content

[0003] In order to solve the problem that during the existing alumina ceramic shell stacking process, the jig on the upper end surface of the large-diameter ceramic shell is deformed under high temperature and gravity, resulting in the deformation of the jig stacked thereon for limiting the small-diameter alumina ceramic shell, the utility model provides a ceramic stacking anti-deformation device.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A ceramic stacking and anti-deformation device comprises a first jig blank and a second jig blank, wherein the second jig blank is stacked on the upper end of the first jig blank, and the first jig blank and the second jig blank are both used to place a ceramic shell blank;

[0006] An anti-deformation pad is installed between the first jig blank and the second jig blank.

[0007] Preferably, the first jig blank comprises a first upper jig blank and a first lower jig blank, a large-diameter ceramic shell blank among the ceramic shell blanks is placed on the upper end of the first lower jig blank, the first upper jig blank is installed on the upper end of the large-diameter ceramic shell blank, and the anti-deformation pad is installed above the first upper jig blank;

[0008] First bosses are respectively arranged on the opposite end surfaces of the first upper jig blank and the first lower jig blank, and the first bosses are located in the port of the large-diameter ceramic shell blank.

[0009] Preferably, the outer diameters of the first upper jig blank and the first lower jig blank are the same as the outer diameter of the large-diameter ceramic shell blank.

[0010] Preferably, the shape size of the second jig blank is obtained by reducing the shape size of the first jig blank by 0.11 to 0.98 times.

[0011] Preferably, the second jig blank comprises a second upper jig blank and a second lower jig blank, the second lower jig blank is placed above the anti-deformation pad, and a small-diameter ceramic shell blank among ceramic shell blanks is placed on the second lower jig blank, and the second upper jig blank is installed above the small-diameter ceramic shell blank;

[0012] The second upper jig blank and the second lower jig blank are provided with second bosses on their opposite end surfaces, and the second bosses are located in the port of the small-diameter ceramic shell blank.

[0013] Preferably, the anti-deformation pad is a cylinder, and the outer diameter of the anti-deformation pad is the same as the outer diameter of the first upper fixture blank.

[0014] Preferably, the anti-deformation pad is made of corundum mullite.

[0015] Preferably, the thickness of the anti-deformation pad is 10-30 mm.

[0016] Preferably, the anti-deformation pad is obtained by compression molding and high-temperature sintering.

[0017] Preferably, the anti-deformation pad has a temperature resistance of not less than 1700°C.

[0018] Compared with the prior art, the utility model has the following beneficial technical effects:

[0019] The utility model discloses a ceramic stacking and deformation prevention device, in which an anti-deformation pad is arranged between a first jig blank and a second jig blank, and the anti-deformation pad is used to provide a flat and stable stacking platform for the second jig blank, so as to provide a stable support for the second jig blank, so that during the firing process of the ceramic shell blank, even if the first jig blank creeps at a high temperature and collapses downward due to its own gravity, the second jig blank on the anti-deformation pad can still maintain the original horizontal state, and will not deform with the deformation of the first upper jig blank, so that the second lower jig blank can effectively limit the shape of the small-diameter ceramic shell blank, so that the shape and size of the fired small-diameter ceramic shell meet the product standard under the control of the second jig blank, thereby improving the production efficiency and the yield rate, and saving the production cost.

[0020] Furthermore, the first jig blank in the present device includes a first upper jig blank and a first lower jig blank, which are installed at both ends of a large-diameter ceramic shell blank through the first upper jig blank and the first lower jig blank, and then cooperate with the first boss to limit the position and shape of the large-diameter ceramic shell blank during the firing process. The second jig blank includes a second upper jig blank and a second lower jig blank, which are installed at both ends of a small-diameter ceramic shell blank, and then cooperate with the second boss to limit the position and shape of the small-diameter ceramic shell blank during the firing process. During the firing process, the first jig blank and the second jig blank shrink synchronously with the ceramic shell blank, thereby controlling the shape and size of the ceramic shell to avoid unexpected deformation during the firing process.

[0021] Furthermore, the shape size of the second jig blank in the present device is obtained by reducing the shape size of the first jig by 0.11 to 0.98 times, thereby facilitating the processing of the jig blank.

[0022] Furthermore, the anti-deformation pad in the present device is made of corundum mullite. Since corundum mullite has high structural strength, high temperature resistance and no deformation, the anti-deformation pad has strong high temperature resistance and will not deform; and the thickness of the anti-deformation pad is: 10-30mm, the anti-deformation pad 4 is cylindrical, and its outer diameter is the same as the outer diameter of the first upper fixture blank. The anti-deformation pad with this outer size and thickness is light in overall weight, and will not impose a large gravity on the large-diameter ceramic shell blank in the first fixture, so that the shape of the large-diameter ceramic shell blank remains stable; the anti-deformation pad is obtained by compression molding and high-temperature sintering, and the prepared anti-deformation pad has a temperature resistance of not less than 1700°C. The anti-deformation pad prepared by this processing method has a long practical life and can be repeatedly used, thereby reducing the firing cost of the ceramic shell product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front cross-sectional structural schematic diagram of a ceramic stacking and firing anti-deformation device disclosed in the utility model;

[0024] Figure 2 It is a structural schematic diagram of an anti-deformation pad in a ceramic stacking and anti-deformation device disclosed in the utility model;

[0025] Figure 3 It is a side view structural schematic diagram of a ceramic blank in a ceramic stacking and firing anti-deformation device disclosed in the utility model;

[0026] Figure 4 It is a schematic cross-sectional structure diagram of a first fixture blank (or a second fixture blank) in a ceramic stacking and anti-deformation device disclosed in the utility model;

[0027] In the attached drawings: 1, ceramic shell blank; 10, large diameter ceramic shell blank; 11, small diameter ceramic shell blank; 2, first fixture blank; 20, first boss; 3, second fixture blank; 30, second boss; 4, anti-deformation pad. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1-Figure 4 The utility model discloses a ceramic stacking and anti-deformation device, which comprises a first jig blank 2 and a second jig blank 3, wherein the second jig blank 3 is stacked on the upper end of the first jig blank 2, and the first jig blank 2 and the second jig blank 3 are both used to place a ceramic shell blank 1, wherein the first jig blank 2 is used to place a large-diameter ceramic shell blank 10 in the ceramic shell blank 1, and the second jig blank 3 is used to place a small-diameter ceramic shell blank 11 in the ceramic shell blank 1;

[0035] See also Figure 1-Figure 4 The first jig blank 2 includes a first upper jig blank and a first lower jig blank, and first bosses 20 are respectively arranged on the lower end surface of the first upper jig blank and the upper end surface of the first lower jig blank. The first upper jig blank is installed on the upper end surface of the large-diameter ceramic shell blank 10, and the first boss 20 arranged thereon is clamped in the upper end port of the large-diameter ceramic shell blank 10. The first lower jig blank is installed on the lower end surface of the large-diameter ceramic shell blank 10, and the first boss 20 arranged thereon is clamped in the lower end port of the large-diameter ceramic shell blank 10. The large-diameter ceramic shell blank 10 is fixed in the first jig blank 2 by the two first bosses 20, and the large-diameter ceramic shell blank 10 is limited in position and shape during the firing process.

[0036] See also Figure 1-Figure 4The shape size of the second fixture blank 3 is obtained by reducing the shape size of the first fixture blank 2 by 0.11 to 0.98 times, and then after the first fixture blank 2 is processed, its outer size is proportionally reduced by 0.11 to 0.98 times to obtain the second fixture blank 3, and then in the process of making the fixture mold, the manufacturing time of the fixture mold is saved and the processing efficiency of the fixture blank is improved; the second fixture blank 3 includes a second upper fixture blank and a second lower fixture blank, and the lower end surface of the second upper fixture blank and the upper end surface of the second lower fixture blank are respectively provided with a second boss 30, the outer diameter of the second boss 30 is smaller than the outer diameter of the second upper fixture blank and the second lower fixture blank, and the second upper fixture blank is installed on the small diameter porcelain On the upper end surface of the shell blank 11, the second boss 30 arranged thereon is located in the upper end port of the small diameter porcelain shell blank 11, and the second lower jig blank is installed on the lower end surface of the small diameter porcelain shell blank 11, and the second boss 30 arranged thereon is located in the lower end port of the small diameter porcelain shell blank 11, and then the tubular small diameter porcelain shell blank 11 is fixed in the second jig blank 3 by the two second bosses 30, and the small diameter porcelain shell blank 11 is limited in position and shape during the firing process; the first jig blank 2 and the second jig blank 3 are synchronously contracted with the porcelain shell blank 1 during the firing process, so that the shape and size of the porcelain shell blank 1 are controlled to shrink in the expected direction, the unexpected deformation of the porcelain shell blank 1 is weakened, and the yield of the porcelain shell is improved.

[0037] See also Figure 1-Figure 4 An anti-deformation pad 4 is arranged between the upper part of the first upper jig blank in the first jig blank 2 and the lower part of the second lower jig blank in the second jig blank 3. The lower end surface of the anti-deformation pad 4 is fitted with the upper end surface of the first upper jig blank, and the upper end surface of the anti-deformation pad 4 is fitted with the lower end surface of the second lower jig blank, thereby forming a stable support platform above the first upper jig blank in the first jig blank 2, stably supporting the second lower jig blank, so that the ceramic shell blank 1 can be fired during the firing process. Even if the first upper jig blank creeps at high temperature and collapses downward due to its own gravity, the second lower jig blank can still maintain its original state under the stable support of the anti-deformation pad 4, and will not deform with the deformation of the first upper jig blank, thereby protecting the shape and size of the small-diameter ceramic shell blank 11 in the second jig blank 3, and effectively preventing the small-diameter ceramic shell from deforming during the stacking firing process as the first jig blank 2 that fixes the large-diameter ceramic shell blank 10 is deformed.

[0038] See also Figure 1 and Figure 3, the anti-deformation pad 4 is a cylinder, and its outer diameter is the same as the outer diameter of the first upper fixture blank. The anti-deformation pad 4 is made of corundum mullite. Since corundum mullite has high structural strength, high temperature resistance, and no deformation, the anti-deformation pad 4 made of it has strong high temperature resistance and can still maintain its original shape after the temperature reaches 1700°C without deformation. The anti-deformation pad 4 still maintains the initial device and will not deform. The thickness of the anti-deformation pad 4 is: 10 to 30 mm. In this example, the thickness of the anti-deformation pad 4 is selected to be 25mm. The anti-deformation pad 4 of this thickness is light in weight. When placed on the first fixture blank 2 and superimposed with the gravity of the second fixture blank 3, it will not superimpose a large gravity on the large-diameter porcelain shell blank 10 placed in the first fixture blank 2, and protect the shape and structural stability of the large-diameter porcelain shell blank 10. The parallelism between the upper end face and the lower end face of the anti-deformation pad 4 is: 0.1-1mm, and the parallelism of the anti-deformation pad 4 in this embodiment is 0.8mm. Ensure the horizontality of the second fixture blank 3 placed on its upper end to avoid its insufficient parallelism, which leads to uncontrollable deformation of the small-diameter porcelain shell blank 11 in the second fixture blank 3 placed thereon during the firing process.

[0039] The anti-deformation pad 4 is obtained by molding and high-temperature sintering. The anti-deformation pad 4 made of corundum mullite is time-saving and labor-saving by this processing method, and the prepared anti-deformation pad 4 has a temperature resistance of not less than 1700°C, so that the anti-deformation pad 4 has a long practical life and can be repeatedly used, reducing the sintering cost of the ceramic shell product.

[0040] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0041] In addition, it should be understood that although this specification is described in accordance with the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A ceramic stacking anti-deformation device, characterized in that: It comprises a first jig blank (2) and a second jig blank (3), wherein the second jig blank (3) is stacked on the upper end of the first jig blank (2), and the first jig blank (2) and the second jig blank (3) are both used to place a ceramic shell blank (1); An anti-deformation pad (4) is installed between the first jig blank (2) and the second jig blank (3).

2. A ceramic stacking and anti-deformation device according to claim 1, characterized in that: The first jig blank (2) comprises a first upper jig blank and a first lower jig blank, a large-diameter ceramic shell blank (10) among the ceramic shell blanks (1) is placed on the upper end of the first lower jig blank, the first upper jig blank is installed on the upper end of the large-diameter ceramic shell blank (10), and the anti-deformation pad (4) is installed above the first upper jig blank; First bosses (20) are respectively arranged on the opposite end surfaces of the first upper jig blank and the first lower jig blank, and the first bosses (20) are located in the port of the large-diameter ceramic shell blank (10).

3. The ceramic stacking and anti-deformation device according to claim 2, characterized in that: The outer diameters of the first upper jig and the first lower jig blanks are the same as the outer diameter of the large-diameter ceramic shell blank (10).

4. The ceramic stacking and anti-deformation device according to claim 3, characterized in that: The shape and size of the second jig blank (3) is obtained by reducing the shape and size of the first jig blank (2) by 0.11 to 0.98 times.

5. The ceramic stacking and anti-deformation device according to claim 1, characterized in that: The second jig blank (3) comprises a second upper jig blank and a second lower jig blank, the second lower jig blank being placed above the anti-deformation pad (4), and a small-diameter ceramic shell blank (11) among the ceramic shell blanks (1) being placed on the second lower jig blank, and the second upper jig blank being installed above the small-diameter ceramic shell blank (11); A second boss (30) is provided on the opposite end surfaces of the second upper jig blank and the second lower jig blank, and the second boss (30) is located in the port of the small-diameter ceramic shell blank (11).

6. The ceramic stacking and anti-deformation device according to claim 2, characterized in that: The anti-deformation pad (4) is a cylinder, and the outer diameter of the anti-deformation pad (4) is the same as the outer diameter of the first upper fixture blank.

7. The ceramic stacking and anti-deformation device according to claim 6, characterized in that: The anti-deformation pad (4) is made of corundum mullite.

8. The ceramic stacking and anti-deformation device according to claim 6, characterized in that: The thickness of the anti-deformation pad (4) is 10 to 30 mm.

9. The ceramic stacking and anti-deformation device according to claim 6, characterized in that: The anti-deformation pad (4) is obtained by compression molding and high-temperature sintering.

10. The ceramic stacking and anti-deformation device according to claim 6, characterized in that: The anti-deformation pad (4) has a temperature resistance of not less than 1700°C.

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