Push-pull box type electric furnace for zirconia ceramic processing
By designing an integrated structure of liftable furnace door and kiln car and a Z-shaped sealing step in the zirconia ceramic processing equipment, combined with the layout of silicon-molybdenum rods on the inner side wall and top of the furnace body, the size limitation, complex operation and heat loss problems of traditional equipment when sintering large-size and complex zirconia ceramics, it has achieved efficient and stable sintering effect.
Patent Information
- Application Number
- CN202421958724.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-13
AI Technical Summary
In the processing of zirconia ceramics, traditional sintering equipment has problems such as size and shape limitations, complex operation, heat loss and external impurities, and it is difficult to efficiently and stably sinter large-sized and complex shape zirconia ceramics.
A push-pull box electric furnace for zirconia ceramic processing is designed. By integrating the furnace door and the kiln truck, a Z-shaped sealing step is arranged on the side of the kiln truck, and a sealing groove on the furnace body is coordinated to achieve a tight sealing of the furnace. At the same time, silicon-molybdenum rods are hoisted on the inner side wall and top of the furnace body to ensure uniform heat transfer.
It improves the sealing, operation ease, uniformity and adaptability of the heating system, ensures high-quality sintering of zirconia ceramics, and improves the mechanical, thermal and chemical stability of the product.
Smart Images
Figure CN223036870U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sintering equipment, in particular to a push-pull type box furnace for zirconia ceramic processing. Background Art
[0002] In the manufacturing process of zirconia ceramics, the sintering link plays a crucial role. The sintering process not only affects the microstructure of the ceramic material but also directly relates to its final mechanical properties, thermal properties, and chemical stability. However, traditional sintering equipment often falls short when dealing with zirconia ceramic processing, especially for large-sized, complex-shaped, or high-demand ceramic parts.
[0003] Firstly, the furnace chamber design of traditional horizontal electric furnaces limits the size and shape of sintered products. Due to the fixed shape and size of the furnace chamber, for non-standard or large-sized zirconia ceramic parts, cutting or re-design is often required to fit the furnace chamber, which not only increases the processing cost but may also affect the overall performance of the product. The furnace doors and kiln cars of traditional electric furnaces are usually designed separately. This design requires multiple opening and closing operations of the furnace doors during operation, which not only increases the complexity of the operation but may also lead to heat loss and intrusion of external impurities due to poor furnace door sealing. Heat loss reduces the sintering efficiency, and the intrusion of external impurities may affect the purity and performance of the product.
[0004] In summary, in view of the deficiencies of traditional sintering equipment in zirconia ceramic processing, there is an urgent need in the market for a device that can sinter large-sized and complex-shaped zirconia ceramics efficiently, stably, and flexibly. As a new type of sintering equipment, the push-pull type box furnace has gradually attracted the attention and favor of the industry due to its unique structural design and excellent performance characteristics. However, the existing push-pull type box furnaces still need to be further improved and perfected in terms of sealing performance, operation convenience, heating system optimization, and adaptability. Content of the Utility Model
[0005] To solve the above problems, the utility model proposes a push-pull type box furnace for zirconia ceramic processing. By integrally designing the furnace door and the kiln car to be liftable and arranging a Z-shaped sealing step part on the side of the kiln car to cooperate with the sealing groove on the furnace body, tight sealing of the furnace chamber is achieved.
[0006] The utility model is realized through the following technical solutions:
[0007] A push-pull box-type electric furnace for zirconia ceramic processing, comprising a furnace body and a furnace door. A kiln car is movably arranged inside the furnace body. The furnace door and the kiln car are integrally designed. A Z-shaped sealing step portion is arranged on the side of the kiln car, and a sealing groove matching with the sealing step portion is arranged on the furnace body. The height of the kiln car can be lifted to change the sealing gap between the sealing groove and the sealing step portion. A moving track is arranged at the bottom of the furnace body along the moving direction of the furnace door and the kiln car, and a moving platform is arranged on the moving track. The furnace door and the kiln car are arranged on the moving platform; silicon molybdenum rods are suspended on the inner side wall and the top of the furnace body; this layout enables heat to be transferred more evenly to all corners of the sintering chamber, improving the uniformity and efficiency of sintering. At the same time, according to the requirements of specific sintered products, the number and position of the silicon molybdenum rods can be flexibly adjusted to meet different sintering process requirements.
[0008] To further optimize the present invention, the following technical solutions can be preferably adopted:
[0009] Preferably, the furnace body includes an outer shell body, and a furnace top and side walls are arranged inside the outer shell body. There are 3 side walls, which are spliced with each other and enclose a semi-closed furnace chamber with the furnace top. The side wall includes a composite lining, and the composite lining includes a heat-insulating cotton layer, a waste fiber board layer, and an alumina hollow ball brick layer arranged in sequence from outside to inside.
[0010] Preferably, the inner wall of the furnace top is arched. The arched design of the furnace top not only enhances the structural stability of the furnace body, but also is conducive to the uniform distribution and reflection of heat, further improving the sintering efficiency.
[0011] Preferably, the furnace top is spliced by a plurality of arc-shaped furnace top bricks. A splicing convex portion is arranged on one side of the arc-shaped furnace top brick, and a splicing concave portion is arranged on the other side of the arc-shaped furnace top brick. The arc-shaped furnace top brick is a formed brick made of waste fiber granulation powder; the use of the formed brick material made of waste fiber granulation powder not only realizes the recycling of resources, but also reduces the production cost. The arrangement of the splicing convex portion and the concave portion makes the connection between the furnace top bricks closer, reducing the possibility of heat leakage.
[0012] Preferably, a hydraulic lifting platform is arranged on the moving platform at the position corresponding to the lower part of the furnace door and the kiln car. The furnace door and the kiln car are arranged on the lifting support surface of the hydraulic lifting platform, and a manual hydraulic control arm for lifting the hydraulic lifting platform is arranged at one end outside the furnace door.
[0013] Preferably, the kiln car and the furnace door are spliced in an L shape. The kiln car includes a loading area formed by stacking a plurality of alumina hollow ball bricks up and down. A plurality of ventilation ducts are arranged side by side along the width direction of the furnace body at the top of the loading area. The furnace door includes a fiber cotton layer and a waste fiber brick layer arranged in sequence from outside to inside.
[0014] The utility model discloses a push-pull type box furnace for zirconia ceramic processing. This furnace has carried out a number of innovative designs on the basis of the background technology and has significant beneficial effects:
[0015] (1) Improve the sealing performance: By integrally designing the furnace door and the kiln car, and setting a Z-shaped sealing step part on the side of the kiln car, which cooperates with the sealing groove on the furnace body, the tight sealing of the furnace chamber is realized. This design effectively prevents the loss of heat during the sintering process and the intrusion of external impurities, improving the sintering effect and product quality.
[0016] (2) Enhance the operation convenience: The height of the kiln car can be lifted, thereby changing the sealing gap between the sealing groove and the sealing step part. This design makes the opening and closing of the furnace chamber more flexible and convenient. At the same time, the furnace door and the kiln car are arranged on the moving platform and slide along the moving track, further simplifying the operation process and improving the work efficiency.
[0017] (3) Optimize the heating system: Silicon molybdenum rods are suspended on the inner side wall and the top of the furnace body. This layout ensures the uniformity of the temperature distribution in the sintering chamber and avoids the problem of inconsistent performance of sintered products caused by temperature gradient in traditional electric furnaces. As a high-temperature heating element, the silicon molybdenum rod has excellent high-temperature resistance performance and stability, and can meet the high-temperature requirements of zirconia ceramic sintering.
[0018] (4) Strong adaptability: This electric furnace adopts a push-pull type design, and the furnace chamber space can be adjusted according to needs, which is suitable for sintering zirconia ceramics of different sizes and shapes. At the same time, its unique sealing structure and heating system enable the electric furnace to maintain a stable temperature and atmosphere environment during the sintering process, providing a strong guarantee for the high-quality sintering of zirconia ceramics.
[0019] In summary, the push-pull type box furnace for zirconia ceramic processing disclosed by the utility model shows significant advantages in terms of sealing performance, operation convenience, heating system optimization and adaptability, and is of great significance for improving the processing quality and production efficiency of zirconia ceramics. Description of the Drawings
[0020] Figure 1 is a three-dimensional structure schematic diagram of a vertical sintering furnace Figure 1 ;
[0021] Figure 2 is a three-dimensional structure schematic diagram of a vertical sintering furnace Figure 2 ;
[0022] Figure 3 is the front view of a vertical sintering furnace;
[0023] Figure 4 is the internal structure schematic diagram of a vertical sintering furnace;
[0024] Figure 5 For Figure 1 The enlarged schematic diagram of the structure at position A in the middle.
[0025] Among them: 1 - furnace body; 2 - furnace door; 3 - furnace car; 4 - furnace chamber; 5 - moving track; 6 - hydraulic lifting platform; 7 - moving wheel; 8 - moving platform; 9 - manual hydraulic control arm; 10 - arc furnace roof brick; 11 - splicing convex part; 12 - splicing groove part; 13 - outer shell; 14 - composite lining; 15 - sealing step part; 16 - sealing groove; 17 - bent sealing area; 18 - silicon molybdenum rod; 19 - ventilation duct. Specific embodiments
[0026] In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "connected" 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 or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0028] Embodiment 1
[0029] As Figures 1 - 5 shown: A push - pull type box - type electric furnace for zirconia ceramic processing, including a furnace body 1, a furnace door 2. A kiln car 3 is movably installed inside the furnace body. The furnace door and the kiln car are integrally designed. A Z - type sealing step part 15 is installed on the side of the kiln car, and a sealing groove 16 matching with the sealing step part is installed on the furnace body. The height of the kiln car can be lifted to change the sealing gap between the sealing groove 16 and the sealing step part 15. A moving track 5 is installed at the bottom of the furnace body along the moving direction of the furnace door and the kiln car. A moving platform is installed on the moving track, and the furnace door and the kiln car are installed on the moving platform; Silicon molybdenum rods are suspended on the inner side wall and the top of the furnace body; This layout enables heat to be transferred more evenly to all corners of the sintering chamber, improving the uniformity and efficiency of sintering. At the same time, according to the requirements of specific sintered products, the number and position of the silicon molybdenum rods can be flexibly adjusted to meet different sintering process requirements.
[0030] The specific lifting principle is as follows: A hydraulic lifting platform 6 is installed at the positions corresponding to the furnace door and under the kiln car on the moving platform. A moving wheel 7 cooperating with the moving track is installed at the bottom of the hydraulic lifting platform 6. The furnace door and the kiln car are installed on the lifting support surface of the hydraulic lifting platform. A manual hydraulic control arm 9 for lifting the hydraulic lifting platform is installed at one end on the outer side of the furnace door. Introduction of the hydraulic lifting platform: (1) Improving operation convenience: By setting the hydraulic lifting platform at the positions corresponding to the furnace door and under the kiln car on the moving platform and equipping it with a manual hydraulic control arm, the lifting operations of the furnace door and the kiln car become simple and fast. The operator can easily lift and lower the furnace door and the kiln car only through the control arm, without complex mechanical operations or cooperation of multiple people, greatly improving the work efficiency. (2) Enhancing sealing performance: The precise control of the hydraulic lifting platform ensures that the furnace door can closely fit the furnace body when closed, effectively preventing heat dissipation and intrusion of external impurities. This improvement in sealing performance is of great significance for maintaining the stability of the furnace temperature and improving the sintering quality. (3) Reducing maintenance costs: The design of the hydraulic lifting platform makes the lifting of the furnace door and the kiln car more stable, reducing the failure rate caused by mechanical wear, thereby reducing the equipment maintenance costs.
[0031] The furnace body includes an outer shell 13. A furnace top and side walls are installed inside the outer shell. There are 3 side walls, and after they are spliced with each other, they enclose a semi-closed furnace chamber 4 with the furnace top. The side wall includes a composite lining 14, and the composite lining includes a heat-insulating cotton layer, a waste fiber board layer, and an alumina hollow sphere brick layer installed in sequence from outside to inside. The inner wall of the furnace top is arched. The furnace top adopts an arched design, which not only enhances the structural stability of the furnace body, but also is conducive to the uniform distribution and reflection of heat, further improving the sintering efficiency. The furnace top is spliced by multiple arc-shaped furnace top bricks. A splicing convex part 11 is installed on one side of the arc-shaped furnace top brick 10, and a splicing groove part 12 is installed on the other side of the arc-shaped furnace top brick. The arc-shaped furnace top brick 10 is made of waste fiber granulation powder formed brick; Using the waste fiber granulation powder formed brick material not only realizes the recycling of resources, but also reduces the production cost. The installation of the splicing convex part and the groove part makes the connection between the furnace top bricks closer, reducing the possibility of heat leakage.
[0032] Among them, the kiln car and the furnace door are spliced in an L shape. The kiln car includes a load-bearing area formed by stacking multiple alumina hollow sphere bricks up and down. A plurality of ventilation ducts 19 are arranged side by side along the width direction of the furnace body at the top of the load-bearing area. The furnace door includes a fiber cotton layer and a waste fiber brick layer installed in sequence from outside to inside. The design of the kiln car and the furnace door spliced in an L shape: (1) Optimize the heat conduction efficiency. The kiln car adopts a load-bearing area formed by stacking multiple alumina hollow sphere bricks up and down, and a plurality of ventilation ducts are arranged side by side along the width direction of the furnace body at the top. This design is conducive to the uniform distribution and rapid circulation of the hot air flow in the furnace, improves the heat conduction efficiency, and makes the sintering process more uniform and efficient; (2) Improve the heat preservation performance: The furnace door adopts a structure of a fiber cotton layer and a waste fiber brick layer arranged in sequence from outside to inside, effectively enhancing the heat preservation performance of the furnace door. The fiber cotton layer has a good heat insulation effect and can reduce the heat loss from the furnace to the outside; the waste fiber brick layer further improves the structural strength and durability of the furnace door. This design not only reduces energy consumption but also extends the service life of the furnace door; (3) Enhance adaptability: The design of the kiln car and the furnace door spliced in an L shape makes the equipment more flexible when processing zirconia ceramic parts of different sizes and shapes. By adjusting the splicing method of the kiln car and the furnace door, it can adapt to the sintering requirements of different specifications, improving the adaptability and versatility of the equipment.
[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A push-pull box-type electric furnace for processing zirconia ceramics, comprising a furnace body and a furnace door, characterized in that: A kiln car is movably arranged in the furnace body, the furnace door and the kiln car are of integrated design, a Z-shaped sealing step portion is arranged on the side of the kiln car, a sealing groove matched with the sealing step portion is arranged on the furnace body, the height of the kiln car can be raised and lowered to change the sealing gap between the sealing groove and the sealing step portion, a moving track is arranged at the bottom of the furnace body along the moving direction of the furnace door and the kiln car, a moving platform is arranged on the moving track, and the furnace door and the kiln car are arranged on the moving platform; silicon molybdenum rods are hoisted on the inner wall and the top of the furnace body.
2. A push-pull box-type electric furnace for processing zirconia ceramics according to claim 1, characterized in that: The furnace body includes an outer shell, a furnace top and side walls are arranged in the outer shell, there are three side walls which are spliced together to form a semi-closed furnace with the furnace top, and the side walls include a composite lining, which includes a thermal insulation cotton layer, a waste fiberboard layer, and an alumina hollow ball brick layer arranged in sequence from the outside to the inside.
3. A push-pull box-type electric furnace for processing zirconia ceramics according to claim 2, characterized in that: The inner wall of the furnace top is arched.
4. A push-pull box-type electric furnace for processing zirconia ceramics according to claim 3, characterized in that: The furnace roof is formed by splicing a plurality of arc-shaped furnace roof bricks which are spliced to each other. A splicing protrusion is arranged on one side of the arc-shaped furnace roof brick, and a splicing groove is arranged on the other side of the arc-shaped furnace roof brick. The arc-shaped furnace roof brick is formed by waste fiber granulation powder.
5. The push-pull box-type electric furnace for processing zirconia ceramics according to claim 1, characterized in that: A hydraulic lifting platform is arranged on the mobile platform at a position corresponding to the furnace door and the lower part of the kiln car. The furnace door and the kiln car are arranged on the lifting support surface of the hydraulic lifting platform. A manual hydraulic control arm for lifting the hydraulic lifting platform is arranged at one end of the outer side of the furnace door.
6. The push-pull box-type electric furnace for processing zirconia ceramics according to claim 1, characterized in that: The kiln car and the furnace door are spliced in an L shape. The kiln car includes a loading area formed by stacking a plurality of alumina hollow spherical bricks. A plurality of ventilation ducts are arranged side by side on the top of the loading area along the width direction of the furnace body. The furnace door includes a fiber cotton layer and a waste fiber brick layer arranged in sequence from the outside to the inside.