A combined ingot mold

Abstract

The utility model provides a kind of combined mould, and the purpose is to solve the technical problem that iron-based material is prone to local melting in existing mould, which affects the purity of industrial silicon.The mould comprises a mould frame, a plug, a mould base plate and a masonry component.The inside of the mould frame is sequentially formed with a first cavity, a second cavity and a third cavity from top to bottom in a stepped manner.The opposite two side frames of the mould frame are respectively provided with a gate.Every gate is respectively movably embedded with a plug.The cross section of the plug is in the shape of a right trapezoid, and the hypotenuse thereof is located inside the mould frame.A lifting lug is provided on the plug.The mould base plate is arranged in the second cavity.The masonry component is arranged on the mould base plate and is composed of silicon carbide combined with silicon nitride material.The utility model uses silicon carbide combined with silicon nitride masonry component, which has high refractoriness and stable quality of industrial silicon.Furthermore, the plug is designed in the shape of an inclined trapezoid and cooperates with the inclined surface of the mould frame.The inclined gate contact surface can prevent silicon water from flowing out of the gap, thereby preventing the risk of silicon water leakage during casting.

Description

Technical Field

[0001] This utility model relates to the field of industrial silicon smelting technology, and in particular to a combined ingot mold. Background Technology

[0002] Ingot molds for industrial silicon casting are crucial equipment in the metallurgical industry, primarily used for casting high-temperature molten silicon. Because industrial silicon reaches extremely high temperatures, far exceeding the melting point of ordinary iron-based materials, prolonged exposure to the high-temperature liquid can cause localized melting of the iron-based materials, contaminating the purity of the industrial silicon. Furthermore, in existing technologies, the plug design of ingot molds is mostly a planar contact structure. Planar contact plugs are prone to deformation at high temperatures, leading to silicon leakage through gaps, resulting in material waste and safety hazards. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide a combined ingot mold that solves the technical problem that the iron-based material in the existing ingot mold is prone to local melting, which affects the purity of industrial silicon.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A combined ingot mold includes: a mold frame, the interior of which is formed, from top to bottom, a stepped first cavity, a second cavity, and a third cavity; openings are respectively provided on the opposite side frames of the mold frame; a blocking block is movably embedded in each opening, the blocking block has a right-angled trapezoidal cross-section, and its hypotenuse is located inside the mold frame; a lifting lug is provided on the blocking block; an ingot mold base plate is disposed in the second cavity; and a masonry component is disposed on the ingot mold base plate and is made of silicon carbide bonded to silicon nitride material.

[0006] This utility model's plug features a slanted trapezoidal design that mates with the inclined surface of the mold frame. The slanted contact surface prevents molten silicon from leaking out through gaps, thus mitigating the risk of silicon leakage during casting. Furthermore, the plug's direct clamping connection eliminates the need for bolt fixing, allowing for quick removal after casting and improving operational efficiency. Additionally, this utility model utilizes silicon carbide combined with silicon nitride masonry components, which offer high refractoriness and stable industrial silicon quality.

[0007] Optionally, the mold frame includes: a rectangular frame; a border, disposed at the upper end of the rectangular frame, with a slope formed on the inner side, and the lower end of the inner side of the border forming a step with the frame; a base plate, formed at the bottom inner side of the frame; wherein, the opening is opened on the border, and both ends penetrate through the border; the ingot mold base plate is disposed on the base plate.

[0008] Optionally, two openings are provided on each side of the frame, and the openings on both sides are arranged symmetrically in pairs.

[0009] Optionally, the top dimension of the block is smaller than the bottom dimension, its right-angled side is flush with the outer wall of the frame, and its hypotenuse coincides with the slope of the frame.

[0010] Optionally, an arc-shaped portion is formed on the lower inner side of the frame, and the arc-shaped portion protrudes from the bottom of the inclined side.

[0011] Optionally, there is a first gap between the inner edge of the frame and the inner wall of the frame.

[0012] Optionally, the first gap between the inner edge of the frame and the inner wall of the frame is 5mm.

[0013] Optionally, the inner edge of the block has a second gap with the inner wall of the frame that is larger than the first gap.

[0014] Optionally, multiple steel pipes are provided on both sides of the frame adjacent to the block, and the multiple steel pipes are arranged symmetrically in pairs.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model's plug features a trapezoidal design with a larger inner diameter and a smaller outer diameter, precisely fitting with the inclined surface of the mold frame to form a self-locking seal. The inclined contact surface generates a self-tightening effect during thermal expansion, preventing molten silicon from leaking out and mitigating the risk of silicon leakage during casting. Furthermore, the plug's direct clamping connection eliminates the need for bolts, allowing for quick removal after casting and improving operational efficiency. Simultaneously, this utility model utilizes silicon carbide combined with silicon nitride building blocks, which have high refractoriness, exceeding 1790 degrees Celsius, significantly higher than the product's casting temperature. Upon contact with the product, the structure remains stable, without reaction or cracking, ensuring stable quality of the industrial silicon. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a top view of the structure of this utility model.

[0020] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.

[0021] Figure 4This is a schematic diagram of the internal structure of this utility model.

[0022] Figure 5 for Figure 4 Enlarged view of the structure at point B.

[0023] Figure 6 This is a cross-sectional view of the mold frame in this utility model.

[0024] Reference numerals: 1. Mold frame; 1a. Step; 10. Frame body; 11. Frame edge; 111. Opening; 112. Arc-shaped part; 12. Base plate; 13. First cavity; 14. Second cavity; 15. Third cavity; 16. First gap; 2. Block; 21. Bevel; 22. Lifting lug; 3. Mold base plate; 4. Masonry component; 5. Steel pipe. Detailed Implementation

[0025] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of this utility model application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0026] In the description of the embodiments of this utility model application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "end", "side" etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, are only for the convenience of describing the embodiments of this utility model application and simplifying the description, and are not intended to 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 on the embodiments of this utility model application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] In the embodiments of this utility model application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model application according to the specific circumstances.

[0029] In the embodiments of this utility model application, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of this utility model application. To simplify the disclosure of the embodiments of this utility model application, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of this utility model application. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of this utility model application; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0031] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0032] like Figures 1-6 As shown in the figure, the present utility model application provides a combined ingot mold, including a mold frame 1, a blocking block 2, an ingot mold base plate 3, and a masonry component 4.

[0033] The mold frame 1 includes an integrally formed frame 10, a side frame 11, and a base plate 12. The frame 10 has a rectangular structure. The side frame 11 is formed at the upper end of the frame 10, and a slope is formed on the inner side of the side frame 11. A step 1a is formed at the lower inner end of the side frame 11 and the inner edge of the top of the frame 10. The base plate 12 is formed on the inner bottom of the frame 10. Through the step 1a formed at the side frame 11 and the frame 10, and the base plate 12, a stepped first cavity 13, a second cavity 14, and a third cavity 15 are formed inside the mold frame 1. At least two openings 111 are respectively provided on the opposite side frames 11 of the mold frame 1. A blocking block 2 is movably embedded in each opening 111. The blocking block 2 has a right-angled trapezoidal cross-section, and its hypotenuse 21 is located on the inner side of the mold frame 1. The ingot mold base plate 3 and the building block 4 are disposed within the second cavity 14. The ingot mold base plate 3 is disposed on the base plate 12, and the first cavity 13 forms a heat dissipation gap on the lower surface of the ingot mold base plate 3. The building block 4 is disposed on the ingot mold base plate 3 and is made of silicon carbide bonded silicon nitride material.

[0034] Optionally, the block 2 is equipped with a lifting lug 22. The lifting lug can be made of ∮32 steel bars and embedded inside the block 2 to facilitate forklift handling of the block 2 and reduce the safety risks associated with manual operation.

[0035] Optionally, the second cavity 14 gradually expands from one end of the frame 10 to the other, that is, a slope is formed on the inner side of the frame 11 of the mold frame 1. The top dimension of the block 2 is smaller than the bottom dimension, its right-angled side is located on the outer side and flush with the outer wall of the frame 11, and its inclined side 21 is located on the inner side of the frame 11, that is, the inclined side 21 is gradually inclined inward from top to bottom, and the inclined side 21 coincides with the slope of the frame 11. The block 2 is directly clamped into the mold frame 1, which facilitates removal after casting, and the inclined contact prevents the risk of silicon leakage during the casting process.

[0036] Optionally, the thickness of the block 2 is approximately equal to the thickness of the frame 11.

[0037] Optionally, two openings 111 are provided on each side of the frame 11 at intervals, and the openings 111 on both sides are set in pairs symmetrically.

[0038] Optionally, the bottom of the frame 11 is rounded, meaning that an arc-shaped portion 112 is formed on the lower inner side of the frame 11. After the inclined side 21 coincides with the slope, the arc-shaped portion 112 protrudes from the inner bottom of the inclined side 21. That is, the two ends of the opening 111 penetrate the frame 11, and a height difference is formed between the surface of the opening 111 and the arc-shaped portion 112, which is the thickness of the arc-shaped portion.

[0039] Optionally, a first gap 16 is provided between the inner edge of the frame 11 and the inner wall of the frame 10.

[0040] Optionally, the first gap between the inner edge of the frame 11 and the inner wall of the frame 10 is 5mm.

[0041] Optionally, the inner edge of the block 2 has a second gap with a gap greater than the first gap 16 between it and the inner wall of the frame 10. That is, there is a gap between the lower end of the inclined side 21 and the inner wall of the frame 10, and the distance between the lower end of the inclined side 21 and the inner wall of the frame 10 is basically equal to the width of the arc-shaped part 112 and the first gap 16.

[0042] Optionally, multiple steel pipes 5 are respectively installed on both sides of the frame 10 adjacent to the block 2. The multiple steel pipes 5 are arranged symmetrically in pairs, that is: (refer to...) Figure 2 As shown, the blocking blocks 2 are symmetrically and spaced apart on the upper and lower sides of the mold frame 1, while the steel pipes 5 are symmetrically and spaced apart on the left and right sides of the mold frame 1.

[0043] Optionally, the thickness of the mold base plate 3 and the masonry component 4 is adapted to the height of the second cavity 14, and the upper surface of the masonry component 4 is flush with the surface of the frame 10 or the stop 111.

[0044] Optionally, the thickness of the ingot mold base plate 3 is t, and the thickness of the masonry component 4 is T, where T satisfies: t≤T≤2t.

[0045] Optionally, the masonry component 4 is constructed from multiple layers of silicon carbide-bonded nitride bricks, each layer consisting of several small silicon carbide-bonded nitride bricks. Optionally, the arrangement of these small silicon carbide-bonded nitride bricks between adjacent layers can be different. Silicon nitride-bonded silicon carbide bricks have high refractoriness, reaching over 1790 degrees Celsius, significantly higher than the product's casting temperature. Upon contact with the product, they exhibit stable structure, do not react, and do not crack, ensuring stable quality of industrial silicon. Furthermore, compared to existing cast iron materials, silicon nitride-bonded silicon carbide bricks are less expensive, and their service life is 1.5 times that of cast iron, contributing to cost savings.

[0046] Optionally, the thickness of the base plate 12 is relatively small, and the thickness of the frame 10 is 8 times or more the thickness of the base plate 12.

[0047] The depth of the second cavity 14 is equal to or slightly greater than the depth of the third cavity 15.

[0048] In one embodiment, the inner surface of the mold frame 1 and / or the surface of the masonry component 4 are provided with an anti-stick coating.

[0049] In one embodiment, a plurality of fasteners are spaced apart on the upper surface of the base plate 12. Blind holes are provided on the ingot mold base plate 3 corresponding to the positions of the fasteners. In use, the fasteners are inserted into the blind holes to fix the ingot mold base plate 3 onto the base plate 12. The fasteners and blind holes are not shown in the figure. The fasteners are cylindrical protrusions, and the blind holes are adapted to the cylindrical protrusions.

[0050] This utility model's plug is designed as a trapezoidal casting with a larger inner diameter and a smaller outer diameter, which fits into the inclined surface of the ingot mold. This prevents molten silica from flowing out through gaps. The plug is directly clamped into the mold frame, facilitating removal after casting. Furthermore, the angled contact prevents the risk of silica leakage during casting. In addition, compared to existing bolted connections (which are prone to loosening and failure at high temperatures), the plug has a longer service life.

[0051] Any aspects not described in detail in this embodiment are techniques known in the art.

[0052] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A combined ingot mold, characterized in that, include: The mold frame (1) has a stepped first cavity (13), a second cavity (14) and a third cavity (15) formed from top to bottom inside. The module (1) includes: Rectangular frame (10); A border (11) is provided at the upper end of the rectangular frame (10), with a slope formed on the inner side, and a step (1a) is formed between the lower inner end of the border (11) and the frame (10). The base plate (12) is formed on the bottom inner side of the frame (10); The two sides (11) of the module frame (1) are respectively provided with openings (111), the openings (111) are opened on the side frame (11) and the two ends penetrate the side frame (11). Each slot (111) is equipped with a movable block (2), the block (2) has a right trapezoidal cross section, and its hypotenuse (21) is located inside the mold frame (1); The top dimension of the block (2) is smaller than the bottom dimension, its right-angled side is flush with the outer wall of the frame (11), and its hypotenuse (21) coincides with the slope of the frame (11); An arc-shaped portion (112) is formed on the lower inner side of the frame (11), and the arc-shaped portion (112) protrudes from the bottom of the inclined side (21); The block (2) is provided with a lifting lug (22); The ingot mold base plate (3) is disposed on the base plate (12) and located in the second cavity (14); The masonry component (4) is set on the ingot mold base plate (3) and is made of silicon carbide combined with silicon nitride material; Wherein, there is a first gap (16) between the inner edge of the frame (11) and the inner wall of the frame (10); there is a second gap between the inner edge of the block (2) and the inner wall of the frame (10) that is greater than the first gap (16).

2. The combined ingot mold according to claim 1, characterized in that, Two openings (111) are respectively opened on both sides of the frame (11), and the openings (111) on both sides are arranged symmetrically in pairs.

3. The combined ingot mold according to claim 1, characterized in that, The first gap between the inner edge of the frame (11) and the inner wall of the frame (10) is 5mm.

4. The combined ingot mold according to claim 1, characterized in that, Multiple steel pipes (5) are respectively arranged on both sides of the frame (10) adjacent to the block (2), and the multiple steel pipes (5) are arranged in pairs symmetrically.

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