Mother-daughter crucible assembly for alloy melting

Abstract

This application provides a mother-daughter crucible assembly for alloy melting. The assembly includes a mother crucible and a daughter crucible nested inside the mother crucible, a first protective medium layer disposed between the mother and daughter crucibles, and a second protective medium layer disposed outside the mother crucible. The thickness of the first protective medium layer is greater than the thickness of the second protective medium layer. Using this mother-daughter crucible assembly, because the first protective medium layer filling the space between the mother and daughter crucibles is relatively thick, the daughter crucible can be reused after the previous melting process, reducing production costs. Furthermore, it has minimal impact on the equipment's vacuum level, thereby improving work efficiency and product quality.

Description

Technical Field

[0001] This application relates to the field of vacuum casting technology, and more particularly to a mother-daughter crucible assembly for alloy melting. Background Technology

[0002] In the field of vacuum casting, the current common method of using crucibles is to use inner and outer liner crucibles. First, the outer crucible is secured with refractory-filled furnace material, and then the baked inner liner crucible is placed directly inside the outer crucible, relying on friction for operation. However, every time the crucible needs to be replaced, it must be refilled with refractory material. This exposes the equipment to the atmosphere for extended periods, and the newly filled refractory material significantly impacts the vacuum environment during operation, preventing the equipment from quickly reaching the required vacuum level and drastically reducing work efficiency.

[0003] To improve crucible replacement efficiency, the industry uses a mother-daughter crucible system. After the mother crucible has been filled and tightened once, only the daughter crucible needs to be replaced. The mother crucible generally doesn't need replacement until the daughter crucible is damaged. However, as the number of times the mother and daughter crucibles are used increases, if the daughter crucible cracks and leaks during the smelting process, it can cause the daughter and mother crucibles to be welded together by the molten steel. When replacing the crucible, the entire mother and daughter crucible system must be scrapped and dismantled, and a new mother crucible must be tightened, impacting work efficiency. Some manufacturers, to avoid daughter crucible cracking, scrap and replace them after one use. While this improves product quality and operational efficiency, it increases the production cost per furnace.

[0004] In view of this, it is necessary to design a mother-daughter crucible assembly for alloy melting to solve one of the above problems. Summary of the Invention

[0005] This application provides a mother-daughter crucible assembly for high-temperature alloy melting, which improves the service life of the crucible and reduces costs.

[0006] To achieve the above objectives, the technical solution provided in this application is as follows:

[0007] This application provides a mother-daughter crucible assembly for alloy melting, the mother-daughter crucible assembly including a mother crucible and a daughter crucible nested inside the mother crucible, a first protective medium layer disposed between the mother crucible and the daughter crucible, and a second protective medium layer nested outside the mother crucible, wherein the thickness of the first protective medium layer is greater than the thickness of the second protective medium layer.

[0008] Furthermore, the thickness of the first protective medium layer is 2cm to 2.5cm.

[0009] Furthermore, the first protective medium layer includes a first mica paper layer, a mica board layer located inside the first mica paper layer, and a first thermal insulation layer located inside the mica board layer.

[0010] Furthermore, the first protective medium layer includes a cylindrical medium layer and a bottom medium layer, the thickness of which is equal to the height difference between the mother crucible and the daughter crucible.

[0011] Furthermore, the second protective medium layer includes a second mica paper layer and a second insulation layer inside the second mica paper layer.

[0012] Furthermore, the thickness of the second protective medium layer is 1.8cm-2.2cm.

[0013] Furthermore, the second mica paper layer comprises 2 to 4 layers of mica paper, and the second mica paper layer is 1mm-2mm thick.

[0014] Furthermore, the second protective medium layer also includes an opening insulation layer disposed at the opening of the mother crucible, the opening insulation layer containing silica sol.

[0015] Compared with related technologies, the beneficial effects of this application are as follows: with the mother and daughter crucible assembly of this application, since the first protective medium layer filled between the mother crucible and the daughter crucible is relatively thick, the daughter crucible can be reused after the previous melting process is completed, reducing production costs; moreover, it has little impact on the vacuum degree of the equipment, thereby improving work efficiency and product quality. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a mother-daughter crucible assembly according to one embodiment of the high-temperature alloy melting assembly of this application.

[0017] Figure 2 yes Figure 1 Exploded view of the components of the neutron mother crucible assembly.

[0018] Figure 3 yes Figure 1 Cross-sectional view of the neutron mother crucible assembly.

[0019] 1-Mother crucible, 2-Daughter crucible, 3-First protective medium layer, 4-Second protective medium layer. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0021] It should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application. Specifically, in this application, the direction facing the ground is referred to as "lower," and conversely, the direction away from the ground is referred to as "upper." Other descriptions of orientation are defined based on "upper" and "lower."

[0022] In the various figures of this application, for ease of illustration, certain dimensions of structures or parts may be exaggerated relative to other structural parts; therefore, they are only used to illustrate the basic structure of the subject matter of this application.

[0023] like Figures 1 to 3 As shown, this application provides a mother-daughter crucible assembly for alloy melting, suitable for equipment used in vacuum alloy melting. The mother-daughter crucible assembly includes a mother crucible 1 and a daughter crucible 2 nested inside the mother crucible 1, a first protective medium layer 3 disposed between the mother crucible 1 and the daughter crucible 2, and a second protective medium layer 4 nested outside the mother crucible 1. The thickness of the first protective medium layer 3 is greater than the thickness of the second protective medium layer 4. The first protective medium layer 2 is relatively thick, allowing the daughter crucible 2 to be reused after the previous melting process, reducing production costs; moreover, it eliminates the need to replace the mother crucible 1, minimizing the impact on the equipment's vacuum level, thereby improving work efficiency and product quality.

[0024] Using the mother-daughter crucible assembly of this application, if the daughter crucible 2 cracks and leaks alloy solution during the melting process, the first protective medium layer 3 of the mother-daughter crucible assembly of this application is relatively thick, which can effectively prevent the daughter crucible 2 and the mother crucible 1 from being welded together. Therefore, only the daughter crucible 2 needs to be replaced, without affecting the reuse of the mother crucible 1, saving time and production costs.

[0025] The process of forming the first protective medium layer 3 in this application is as follows: a first mica paper layer and a mica board layer are placed inside the mother crucible 1; the outer side of the daughter crucible 2 is wrapped with heat-insulating cotton, and the thickness of the bottom heat-insulating layer is adjusted according to the depth of the mother crucible 1, or several mica board layers are placed before the heat-insulating layer is placed, and the wrapped daughter crucible 2 is inserted into the mother crucible 1 and pressed tightly for use; when it is necessary to replace the crucible, the daughter crucible 2 is simply removed, the used heat-insulating layer is removed, and then a new heat-insulating layer is set and inserted back into the mother crucible 1.

[0026] Preferably, the thickness of the first protective medium layer 3 is 2cm to 2.5cm, which can effectively isolate the alloy solution leaking from the daughter crucible 1. The thickness of the first protective medium layer 3 is the difference between the inner diameter of the mother crucible 1 and the outer diameter of the daughter crucible 2. A larger difference is more conducive to filling the space between the mother crucible 1 and the daughter crucible 2 with the first protective medium layer 3, thus saving working time.

[0027] Furthermore, the first protective medium layer 3 includes a first mica paper layer, a mica board layer located inside the first mica paper layer, and a first insulation layer located inside the mica board layer. The first mica paper layer is tightly attached to the inner wall of the mother crucible 1, which can effectively protect the inner wall of the mother crucible 1 and prevent scratches. In this application, the first mica paper layer is stacked in 2 to 4 layers, with a thickness between 1 mm and 2 mm.

[0028] The mica plate layer is slightly harder than the first mica paper layer, which serves to support the sub-crucible 2, ensuring that the sub-crucible 2 is in a vertical position, ensuring that the sub-crucible 2 and the alloy solution inside the sub-crucible 2 are heated evenly, and preventing the sub-crucible 2 from cracking.

[0029] This effectively protects the mother crucible 1 from localized pressure from the daughter crucible 2, and makes it convenient to place the daughter crucible 2 and the insulation layer into the mother crucible 1 when replacing the daughter crucible 2.

[0030] The first protective medium layer 3 includes a cylindrical medium layer and a bottom medium layer. The thickness of the bottom medium layer is equal to the height difference between the mother crucible 1 and the daughter crucible 2. If the height difference between the mother crucible 1 and the daughter crucible 2 is greater than the thickness of the bottom medium layer, several mica plate layers can be added to increase the thickness of the bottom medium layer, so as to avoid the risk of leakage of alloy solution due to gaps at the openings of the daughter crucible 2 and the mother crucible 1.

[0031] The second protective medium layer 4 is used to protect and isolate the mother crucible 1 from the working coil of the ingot furnace, ensuring that the mother crucible 1 is in a vertical state, so that the induced magnetic field of the working coil can heat the alloy in the daughter crucible 2 more evenly and effectively, and avoid uneven heating of the daughter crucible 2.

[0032] The second protective medium layer 4 includes a second mica paper layer and a second insulation layer inside the second mica paper layer. The formation process of the second protective medium layer 4 is as follows: the second mica paper layer is placed in the working coil, the outside of the mother crucible 1 is wrapped with insulation cotton, and the thickness of the bottom insulation layer is adjusted according to the depth of the working coil. The wrapped mother crucible 1 is then inserted into the working coil and pressed tightly for use.

[0033] The thickness of the second protective medium layer 4 is 1.8cm-2.2cm, which is slightly thinner than the first protective medium layer 3, so as to avoid affecting the heat conduction between the working coil and the mother crucible 1.

[0034] The second mica paper layer comprises 2 to 4 layers of mica paper, with the second mica paper layer being 1mm-2mm thick. The design of the second insulation layer being thicker than the second mica paper layer ensures that the alloy solution inside the mother crucible 1 is kept at a constant temperature, avoiding the impact of temperature instability on the product.

[0035] The second protective medium layer 4 also includes an opening insulation layer at the opening of the mother crucible 1. The opening insulation layer contains silica sol, which accelerates the drying process.

[0036] In this application, the insulating cotton located at the opening of the mother crucible 1 is in the shape of a long strip, which is not easy to shed lint and avoids being mixed into the alloy solution and affecting the purity of the alloy solution.

[0037] In summary, by utilizing the mother-daughter crucible assembly of this application, since the first protective medium layer 3 filled between the mother crucible 1 and the daughter crucible 2 is relatively thick, the daughter crucible 2 can be reused after the previous melting process is completed, reducing production costs; moreover, it has little impact on the vacuum degree of the equipment, thereby improving work efficiency and product quality.

[0038] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0039] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of this application and are not intended to limit the scope of protection of this application. All equivalent embodiments or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A sub-charged crucible assembly for alloy smelting, characterized by, It includes a mother crucible and a daughter crucible nested inside the mother crucible, a first protective medium layer disposed between the mother crucible and the daughter crucible, and a second protective medium layer nested outside the mother crucible, wherein the thickness of the first protective medium layer is greater than the thickness of the second protective medium layer.

2. The daughter-mother crucible assembly for alloy smelting of claim 1, wherein, The thickness of the first protective medium layer is 2cm to 2.5cm.

3. The daughter-mother crucible assembly for alloy smelting of claim 1, wherein, The first protective medium layer includes a first mica paper layer, a mica board layer located inside the first mica paper layer, and a first thermal insulation layer located inside the mica board layer.

4. The daughter-mother crucible assembly for alloy smelting of claim 1 wherein, The first protective medium layer includes a cylindrical medium layer and a bottom medium layer, the thickness of which is equal to the height difference between the mother crucible and the daughter crucible.

5. A sub-charging crucible assembly for alloy smelting as claimed in any one of claims 1 to 4 wherein, The second protective medium layer includes a second mica paper layer and a second insulation layer inside the second mica paper layer.

6. The daughter-mother crucible assembly for alloy smelting of claim 5, wherein, The thickness of the second protective medium layer is 1.8cm-2.2cm.

7. The daughter-mother crucible assembly for alloy smelting of claim 5 wherein, The second mica paper layer comprises 2 to 4 layers of mica paper, and the second mica paper layer is 1mm-2mm thick.

8. The daughter-mother crucible assembly for alloy smelting of claim 5, wherein, The second protective medium layer also includes an opening insulation layer disposed at the opening of the mother crucible, the opening insulation layer containing silica sol.

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