A brazier

Abstract

The utility model relates to a technology field of bearing frame, concretely relates to a bearing frame, include, frame body, bearing plate, horizontal setting are in frame body, including connecting rod and ceramic stick, connecting rod sets up two, two connecting rods parallel and interval setting are in frame body, ceramic stick is equipped with many, many ceramic sticks set up between two connecting rods, and along the length direction of connecting rod sequentially adjacent setting for bearing ceramic product, the both ends of ceramic stick are detachable type connection with two connecting rods respectively. The utility model has solved the bottom and edge area of ceramic product in the ceramic sintering process of existing bearing frame because of contact bearing frame's support heat conduction too fast, and the central area of ceramic product is heated lag, forms temperature gradient, easily causes thermal stress concentration, influences product quality.

Description

Technical Field

[0001] This utility model relates to the field of firing support technology, specifically to a firing support. Background Technology

[0002] Ceramic bushings (such as alumina and zirconia bushings) are widely used in mechanical seals, bearings, and aerospace due to their high strength, wear resistance, and high temperature resistance. Their sintering process requires high temperatures (typically 1300-1600℃), but ceramic materials are extremely sensitive to temperature field uniformity. Local temperature differences exceeding ±20℃ can trigger thermal stress concentration, leading to product cracking, deformation, or abnormal crystal phases (such as the tetragonal-to-monoclinic phase transformation failure of zirconia), significantly reducing the yield (the industry average pass rate is less than 70%).

[0003] In related technologies, a firing rack is generally used to support ceramic products in a kiln for sintering. However, the firing rack is usually a plate structure. During the ceramic sintering process, the bottom and edge areas of the ceramic products are in contact with the support of the firing rack, and the heat conduction is too fast, while the central area of ​​the ceramic products is heated later, forming a temperature gradient. This can easily cause thermal stress concentration and affect product quality. Utility Model Content

[0004] This utility model provides a firing support that solves the problem that in the existing firing support, the bottom and edge areas of the ceramic product are in contact with the support frame of the firing support and the heat conduction is too fast, while the central area of ​​the ceramic product is heated lagging behind, forming a temperature gradient, which easily leads to thermal stress concentration and affects product quality.

[0005] In view of this, the present invention provides a firing support frame, comprising:

[0006] Frame;

[0007] A firing plate, horizontally mounted on the frame, includes connecting rods and ceramic rods; two connecting rods are provided, parallel and spaced apart on the frame; multiple ceramic rods are provided; multiple ceramic rods are arranged between two connecting rods and sequentially adjacent to each other along the length of the connecting rods, for supporting ceramic products; both ends of each ceramic rod are detachably connected to the two connecting rods respectively.

[0008] Optionally, the ceramic rod is a microporous ceramic rod.

[0009] Optionally, the ceramic rod is connected to the connecting rod by screws.

[0010] Optionally, the connecting rod is provided with countersunk holes for the screws to pass through for each of the ceramic rods, and the countersunk holes are arranged along the axial direction of the ceramic rods.

[0011] Optionally, the screw is a ceramic screw.

[0012] Optionally, the firing plate is provided in multiple layers, and the multiple layers of firing plates are arranged at intervals along the vertical direction on the frame.

[0013] The technical solution of this utility model has the following advantages:

[0014] 1. This utility model uses closely adjacent ceramic rods to support ceramic products, resulting in uniform pressure distribution and preventing local collapse of ceramic products during sintering. The line contact between the ceramic rods and the ceramic products reduces heat transfer between them compared to surface contact, thus avoiding the problem of temperature gradients caused by excessive heat conduction in the bottom and edge areas of the ceramic products during sintering, while the central area experiences delayed heating.

[0015] 2. In this utility model, the gap space formed between two adjacent ceramic rods and the ceramic product allows for good hot gas circulation in the furnace, ensuring that the temperature conduction speed is the same and that the ceramic product is heated evenly as a whole. This avoids the risk of product cracking, deformation or abnormal crystal phase caused by thermal stress concentration. In addition, during the sintering and debinding process, the gas can be discharged through the gap, resulting in uniform debinding, reducing defects in the ceramic product and improving the molding quality of the product.

[0016] 3. In this utility model, the ceramic rod and the connecting rod are detachably connected, which makes it easy to replace a damaged ceramic rod individually and extend the service life of the firing plate.

[0017] 4. In this utility model, the friction between the ceramic rod and the ceramic product is small, which facilitates the sintering of the green body. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of the firing support provided by this utility model;

[0020] Figure 2 A schematic diagram of the structure of the firing plate provided by this utility model from a first perspective.

[0021] Figure 3 A schematic diagram of the structure of the firing plate provided by this utility model from a second perspective;

[0022] Figure 4 for Figure 3 Sectional view at point AA;

[0023] Figure 5 A schematic diagram of the ceramic rod provided by this utility model from a third-angle perspective;

[0024] Figure 6 for Figure 5 Sectional view at point BB.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Frame; 2. Firing plate; 21. Connecting rod; 22. Ceramic rod. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0032] According to an embodiment of this utility model, a firing support frame is provided, comprising: a frame body 1; a firing plate 2, horizontally arranged on the frame body 1, including connecting rods 21 and ceramic rods 22; two connecting rods 21 are provided, which are parallel and spaced apart on the frame body 1; multiple ceramic rods 22 are provided; the multiple ceramic rods 22 are arranged between two connecting rods 21 and are arranged adjacent to each other along the length direction of the connecting rods 21, for supporting ceramic products; the two ends of the ceramic rods 22 are detachably connected to the two connecting rods 21 respectively.

[0033] It should be noted that the multiple ceramic rods 22 are arranged in parallel.

[0034] In this embodiment, during sintering, the frame 1 is placed in the center of the kiln, and the ceramic product is placed horizontally on the ceramic rods 22 of the firing plate 2 for sintering. By using adjacent ceramic rods 22 to support the ceramic product, the ceramic rods 22 and the ceramic product are in line contact. Compared with surface contact, this reduces heat transfer between the ceramic rods 22 and the ceramic product, thus avoiding the problem of temperature gradients formed in the bottom and edge areas of the ceramic product during sintering due to excessive heat conduction from the support frame and delayed heating in the center area. Furthermore, the close contact between the ceramic rods 22 ensures uniform pressure distribution, preventing local collapse of the ceramic product during sintering. Since the ceramic rods 22 are cylindrical and adjacent... Two ceramic rods 22 are adjacent to each other, thus forming a gap between the two adjacent ceramic rods 22 and the bottom of the ceramic product. This ensures good hot gas circulation in the furnace and uniform temperature conduction, guaranteeing that the ceramic product is heated evenly. This avoids the risk of product cracking, deformation, or abnormal crystal phase caused by thermal stress concentration. Furthermore, gas can be discharged through this gap during sintering and debinding, resulting in uniform debinding, reducing defects in the ceramic product, and improving the molding quality. The ceramic rods 22 and the connecting rod 21 are detachably connected, making it easy to replace a damaged ceramic rod 22 independently and extending the service life of the firing plate 2. In addition, the low friction between the ceramic rods 22 and the ceramic product facilitates the sintering of the green body.

[0035] In one embodiment, ceramic rod 22 is a microporous ceramic rod.

[0036] In this embodiment, the ceramic rod 22 is a microporous ceramic rod with nanoscale pores, which allows for air permeability and further enhances the thermal cycling and air permeability effects.

[0037] Specifically, such as Figure 3 As shown, two adjacent ceramic rods 22 are tangent to each other, and the gap between the two adjacent ceramic rods 22 at the tangent position is zero, which ensures uniform pressure distribution and avoids local collapse during the sintering of ceramic products.

[0038] In this embodiment, there is a gap between two adjacent ceramic rods 22 to ensure that gas can be discharged through the gap during the sintering and debinding process, so as to make the debinding uniform and reduce defects in ceramic products.

[0039] In one embodiment, such as Figure 2 and Figure 6 As shown, the ceramic rod 22 and the connecting rod 21 are connected by screws.

[0040] It should be noted that the screw and ceramic rod 22 are coaxially connected through the connecting rod 21 and connected to the ceramic rod 22.

[0041] In this embodiment, the ceramic rod 22 and the connecting rod 21 are connected by screws, which facilitates installation and disassembly.

[0042] In one embodiment, such as Figure 2 As shown, each ceramic rod 22 on the connecting rod 21 is provided with a countersunk hole for screws to pass through, and the countersunk hole is set along the axial direction of the ceramic rod 22.

[0043] In this embodiment, a countersunk hole is provided so that the screw can pass through the countersunk hole and connect with the ceramic rod 22, so that the head of the screw is hidden in the countersunk hole, which improves the aesthetics.

[0044] In one embodiment, the screw is a ceramic screw.

[0045] In this embodiment, ceramic screws are used to avoid damage to the threads in the threaded hole of the ceramic rod 22 caused by the use of metal screws to connect with the ceramic rod 22.

[0046] In one embodiment, such as Figure 1 As shown, the firing plate 2 has multiple layers, and the multiple layers of firing plates 2 are arranged at intervals along the vertical direction on the frame 1.

[0047] In this embodiment, since the firing plate 2 is horizontally arranged, multiple layers can be provided. Compared with the vertical firing rack, this improves the space utilization rate in the kiln, allows multiple ceramic products to be fired at the same time, and reduces production costs.

[0048] The specific working principle of the firing support frame provided in this embodiment is as follows: During sintering, the frame 1 is placed in the center of the kiln, and the ceramic product is placed horizontally on the ceramic rods 22 of the firing support plate 2 for sintering. Multiple closely connected ceramic rods 22 support the ceramic product, and the pressure is evenly distributed, so that there is line contact between the ceramic rods 22 and the ceramic product. Compared with the surface contact, this reduces local heat transfer between the ceramic rods 22 and the ceramic product, and avoids local collapse of the ceramic product during sintering. The gap space formed between the bottom of two adjacent ceramic rods 22 and the ceramic product allows for good hot gas circulation in the kiln, ensuring that the temperature conduction speed is the same, ensuring that the ceramic product is heated evenly as a whole, and reducing the risk of product cracking, deformation or abnormal crystal phase. Sintering and glue removal. During the process, gas can also be discharged through this gap space, resulting in uniform glue discharge, reducing defects in ceramic products, and improving the molding quality of the products. The ceramic rod 22 and the connecting rod 21 are connected by screws, which makes it easy to replace a damaged ceramic rod 22 independently, extending the service life of the firing plate 2. In addition, the friction between the ceramic rod 22 and the ceramic product is small, which facilitates the sintering of green bodies. Multiple layers of firing plates 2 can be set to improve the space utilization rate in the kiln, reduce production costs, and solve the problem that in the existing firing rack, the bottom and edge areas of the ceramic product are in contact with the support of the firing rack and the heat conduction is too fast, while the central area of ​​the ceramic product is heated lagging behind, forming a temperature gradient, which easily causes thermal stress concentration and affects product quality.

[0049] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A firing support frame, characterized in that, include; Frame (1); A firing plate (2) is horizontally arranged on the frame (1) and includes a connecting rod (21) and a ceramic rod (22). There are two connecting rods (21), which are parallel and spaced apart on the frame (1). There are multiple ceramic rods (22). Multiple ceramic rods (22) are arranged between two connecting rods (21) and are arranged adjacent to each other along the length of the connecting rods (21) to support ceramic products. The two ends of the ceramic rods (22) are detachably connected to the two connecting rods (21).

2. The firing support according to claim 1, characterized in that, The ceramic rod (22) is a microporous ceramic rod.

3. The firing support frame according to claim 1, characterized in that, The ceramic rod (22) is connected to the connecting rod (21) by screws.

4. The firing support according to claim 3, characterized in that, The connecting rod (21) is provided with countersunk holes for the screws to pass through for each ceramic rod (22), and the countersunk holes are arranged along the axial direction of the ceramic rod (22).

5. The firing support according to claim 3, characterized in that, The screw is a ceramic screw.

6. The firing support according to any one of claims 1 to 5, characterized in that, The firing plate (2) is provided with multiple layers, and the multiple layers of the firing plate (2) are arranged at intervals along the vertical direction on the frame (1).

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