Fused cast zirconia corundum composite model with good thermal conductivity

Abstract

The utility model relates to the technical field of fused cast zirconia corundum molds, and discloses a fused cast zirconia corundum composite model with good thermal conductivity, which comprises a lower mold and an upper mold, the upper mold is arranged at the top of the lower mold, casting grooves are formed in the lower mold and the upper mold, fused cast zirconia corundum bricks are arranged in the two casting grooves, and the fused cast zirconia corundum bricks are arranged in the casting grooves. A casting hole is formed in the top of the upper mold, a riser funnel is fixedly connected to the top of the upper mold, and assembling grooves are formed in the corners of the inner side of the casting groove. According to the utility model, materials are cast from the riser funnel and then insulated and annealed, and the heat conductivity coefficient of the inner molds arranged at the corners of the casting groove is much lower than that of a lower mold and an upper mold, so that the heat conduction speed at the corners can be reduced, and the overall heat conduction of the fused cast zirconia corundum brick tends to be balanced; the situation that the corners of the fused cast zirconia corundum brick are broken due to the fact that overlarge stress is generated in the fused cast zirconia corundum brick can be avoided, and therefore the percent of pass of products can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fused zirconia corundum molds, and particularly relates to a fused zirconia corundum composite model with good thermal conductivity. Background Art

[0002] With the continuous development of glass furnaces towards the trends of large-scale, energy-saving and long-life, in order to meet the design requirements, the number of various large-sized, extra-large-sized and special-shaped specifications in the used fused AZS bricks is increasing. Fused AZS melts the mixture of raw and auxiliary materials into a liquid state in an electric arc furnace, then pours it into a prefabricated mold, solidifies into a solid state after heat preservation and annealing, and finally cools down to room temperature to form a product.

[0003] The molds in the prior art usually adopt the same material, with the same thermal conductivity and heat absorption performance. During the heat preservation and annealing of the internal products, the cooling rate at the corner parts is significantly faster than that at the central part, and the generation and release of internal stress are extremely unbalanced, which will lead to a large number of cracked waste products and seriously reduce the qualified rate of products. Therefore, the technicians in this field propose a fused zirconia corundum composite model with good thermal conductivity to solve the above problems. Summary of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides a fused zirconia corundum composite model with good thermal conductivity, aiming to improve the problems that during the heat preservation and annealing of the internal products in the mold in the prior art, the generation and release of internal stress are extremely unbalanced, which will lead to a large number of cracked waste products and seriously reduce the qualified rate of products.

[0005] To achieve the above object, the utility model provides the following technical scheme: A fused zirconia corundum composite model with good thermal conductivity, including a lower mold and an upper mold. The upper mold is arranged on the top of the lower mold. Pouring grooves are opened inside both the lower mold and the upper mold. Fused zirconia corundum bricks are arranged inside the two pouring grooves. A pouring hole is opened on the top of the upper mold. A riser funnel is fixedly connected to the top of the upper mold. Assembly grooves are opened at the inner corners of the pouring groove. Inner molds are slidably connected inside the assembly grooves. A mold closing assembly is arranged outside the upper mold, and the mold closing assembly is used for stably closing the lower mold and the upper mold.

[0006] Further, the mold closing assembly includes two splicing blocks, and one end of the splicing block is fixedly connected to the bottom of the upper mold.

[0007] Further, two splicing grooves are opened on the top of the lower mold, and the outside of the splicing block is clamped inside the splicing groove.

[0008] Further, clamping blocks are fixedly connected to both ends of the inner mold, and clamping grooves are opened on the inner wall of the assembly groove.

[0009] Further, the outside of the clamping block is clamped inside the clamping groove.

[0010] Further, grooves are provided on both outer sides of the upper mold.

[0011] Further, the bottom of the riser funnel is communicated with one end of the casting hole, and the other end of the casting hole is communicated with the casting groove.

[0012] Further, the materials of the lower mold and the upper mold are graphite plate materials, and the material of the assembly groove is silica sand material.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, after casting the material from the riser funnel and then performing heat preservation annealing, the inner mold arranged at the corner of the casting groove is made of silica sand material, and its thermal conductivity is much lower than that of the graphite plate material of the lower mold and the upper mold. In this way, the heat conduction speed at the corners can be reduced, so that the overall heat conduction of the fused cast zirconia corundum brick tends to be balanced, and it can avoid the generation of excessive stress inside the fused cast zirconia corundum brick, resulting in cracks at the corners of the fused cast zirconia corundum brick. In this way, the qualified rate of the product can be improved.

[0015] 2. In the utility model, by fitting the splicing block into the splicing groove, the lower mold and the upper mold can be clamped more stably. And the cooperation between the clamping block and the clamping groove can make the inner mold assembled more stably inside the assembly groove, making the casting effect more stable, and the two grooves are buckled to facilitate the demolding of the lower mold and the upper mold. Description of the Drawings

[0016] Figure 1 is a three-dimensional view of a fused cast zirconia corundum composite model with good thermal conductivity proposed by the utility model;

[0017] Figure 2 is a schematic structural view of the inner mold of a fused cast zirconia corundum composite model with good thermal conductivity proposed by the utility model;

[0018] Figure 3 is a schematic structural view of the upper mold of a fused cast zirconia corundum composite model with good thermal conductivity proposed by the utility model;

[0019] Figure 4 is a top view of the lower mold of a fused cast zirconia corundum composite model with good thermal conductivity proposed by the utility model.

[0020] Legend Explanation:

[0021] 1. Lower mold; 2. Upper mold; 3. Casting groove; 4. Cast fused zirconia corundum brick; 5. Casting hole; 6. Riser funnel; 7. Assembly groove; 8. Inner mold; 9. Splicing block; 10. Splicing groove; 11. Card slot; 12. Card block; 13. Groove. Detailed implementation mode

[0022] 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 present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all 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 shall fall within the protection scope of the present invention.

[0023] Refer to Figures 1 - 3 As shown in the figure, an embodiment provided by the present invention: a cast fused zirconia corundum composite model with good thermal conductivity, including a lower mold 1 and an upper mold 2. The upper mold 2 is arranged on the top of the lower mold 1. Casting grooves 3 are opened inside both the lower mold 1 and the upper mold 2. A cast fused zirconia corundum brick 4 is arranged inside the two casting grooves 3. A casting hole 5 is opened on the top of the upper mold 2. A riser funnel 6 is fixedly connected to the top of the upper mold 2. Assembly grooves 7 are opened at the inner corners of the casting groove 3. An inner mold 8 is slidably connected inside the assembly groove 7. A mold closing assembly is arranged outside the upper mold 2. The mold closing assembly is used for the stable mold closing of the lower mold 1 and the upper mold 2. Pouring the molten material from the top of the riser funnel 6 will enter the two casting grooves 3 through the casting hole 5. When the two casting grooves 3 are filled, the riser funnel 6 can be cut off, and then heat preservation annealing is carried out. Generally, the heat conduction at the corners of the cast fused zirconia corundum brick 4 is faster than that at the central plane. The inner mold 8 arranged at the corners of the casting groove 3 is made of silica sand material, and the thermal conductivity coefficient is about 1W / m.k, which is much lower than the thermal conductivity coefficient of 150W / m.k of the graphite plate material of the lower mold 1 and the upper mold 2. In this way, the heat conduction speed at the corners can be reduced, so that the overall heat conduction of the cast fused zirconia corundum brick 4 tends to be balanced, and it can avoid the occurrence of cracks at the corners of the cast fused zirconia corundum brick 4 due to excessive stress inside the cast fused zirconia corundum brick 4. In this way, the qualified rate of the product can be improved.

[0024] Refer to Figures 2 - 4, the die clamping assembly includes two splicing blocks 9. One end of the splicing block 9 is fixedly connected to the bottom of the upper die 2. Two splicing grooves 10 are provided at the top of the lower die 1. The outside of the splicing block 9 is clamped inside the splicing groove 10. Clamping blocks 12 are fixedly connected to both ends of the inner die 8. Card slots 11 are provided on the inner wall of the assembly groove 7. The outside of the clamping block 12 is clamped inside the card slot 11. Grooves 13 are provided on both outer sides of the upper die 2. The bottom of the riser funnel 6 is communicated with one end of the casting hole 5. The other end of the casting hole 5 is communicated with the casting groove 3. The materials of the lower die 1 and the upper die 2 are graphite plate materials. The material of the assembly groove 7 is silica sand material. The splicing block 9 is inserted into the splicing groove 10, which can make the die clamping of the lower die 1 and the upper die 2 more stable. And the cooperation between the clamping block 12 and the card slot 11 can make the inner die 8 more stably assembled inside the assembly groove 7, making the casting effect more stable. And by buckling the two grooves 13, it is convenient for the lower die 1 and the upper die 2 to be demolded.

[0025] Working principle: First, pour the molten material from the top of the riser funnel 6, and it will enter the two casting grooves 3 through the casting hole 5. When the two casting grooves 3 are filled, the riser funnel 6 can be removed, and then heat preservation annealing is carried out. Generally, the heat conduction at the corners of the fused zirconia corundum brick 4 is faster than that at the central plane. The inner die 8 provided at the corner of the casting groove 3 is made of silica sand material, and the thermal conductivity is about 1W / m.k, which is much lower than the thermal conductivity of 150W / m.k of the graphite plate materials of the lower die 1 and the upper die 2. In this way, the heat conduction speed at the corners can be reduced, making the overall heat conduction of the fused zirconia corundum brick 4 tend to be balanced, and it can avoid the internal generation of excessive stress in the fused zirconia corundum brick 4 resulting in cracks at the corners of the fused zirconia corundum brick 4. In this way, the qualified rate of the product can be improved. In addition, the splicing block 9 is inserted into the splicing groove 10, which can make the die clamping of the lower die 1 and the upper die 2 more stable. And the cooperation between the clamping block 12 and the card slot 11 can make the inner die 8 more stably assembled inside the assembly groove 7, making the casting effect more stable. And by buckling the two grooves 13, it is convenient for the lower die 1 and the upper die 2 to be demolded.

[0026] 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 for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fused-cast zirconia corundum composite model with good thermal conductivity, comprising a lower mold (1) and an upper mold (2), characterized in that: The upper mold (2) is arranged on the top of the lower mold (1). Pouring grooves (3) are provided inside both the lower mold (1) and the upper mold (2). A fused zirconia corundum brick (4) is arranged inside the two pouring grooves (3). A pouring hole (5) is provided on the top of the upper mold (2). A riser funnel (6) is fixedly connected to the top of the upper mold (2). Assembly grooves (7) are provided at the inner corners of the pouring groove (3). An inner mold (8) is slidably connected inside the assembly groove (7). A mold clamping assembly is arranged outside the upper mold (2), and the mold clamping assembly is used for stably clamping the lower mold (1) and the upper mold (2).

2. The good heat-conducting fused zirconia corundum composite model according to claim 1, wherein: The mold clamping assembly includes two splicing blocks (9), and one end of the splicing block (9) is fixedly connected to the bottom of the upper mold (2).

3. A fused-cast zirconia corundum composite model with good thermal conductivity according to claim 2, characterized in that: Two splicing grooves (10) are provided on the top of the lower mold (1), and the outside of the splicing block (9) is clamped inside the splicing groove (10).

4. A fused-cast zirconia corundum composite model with good thermal conductivity according to claim 1, characterized in that: Both ends of the inner mold (8) are fixedly connected with clamping blocks (12), and clamping grooves (11) are provided on the inner wall of the assembly groove (7).

5. A fused cast zirconia corundum composite model with good thermal conductivity according to claim 4, characterized in that: The outside of the clamping block (12) is clamped inside the clamping groove (11).

6. The good heat-conducting fused zirconia corundum composite model according to claim 1, wherein: Grooves (13) are provided on both outer sides of the upper mold (2).

7. A fused-cast zirconia corundum composite model with good thermal conductivity according to claim 1, characterized in that: The bottom of the riser funnel (6) is communicated with one end of the pouring hole (5), and the other end of the pouring hole (5) is communicated with the pouring groove (3).

8. A fused-cast zirconia corundum composite model with good thermal conductivity according to claim 1, characterized in that: The materials of the lower mold (1) and the upper mold (2) are graphite plate materials, and the material of the assembly groove (7) is silica sand material.

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