Bulk material sample forming combined die

Abstract

The utility model relates to a bulk material sample forming combined die, and belongs to the technical field of quality inspection in the metallurgical industry. Comprising a cylindrical female die with a hollow inner cavity, a pressing head is inserted into the inner cavity of the female die from the inlet end of the female die, and the outlet end of the female die is detachably connected with a die cushion; chamfered edges are respectively arranged at two ends of the inner wall of the female die; after pressing is completed, the die cushion is replaced with a demolding device, the demolding device is of a cylindrical structure with a hollow inner cavity, and after replacement, the demolding device is communicated with the inner cavity of the female die; the die cushion comprises a base and a protruding part which are connected with each other, and the protruding part is inserted into an inner cavity of the female die. The pressure head comprises a chassis and a cylinder which are connected with each other; the cylinder is inserted into the inner cavity of the female die; lubricating layers are arranged on the inner wall of the female die, the outer wall of the protruding part and the outer wall of the cylinder. According to the utility model, the bulk material is pressed into a large sample block by utilizing the plasticity, high elongation rate and percentage reduction of area of the bulk material, so that a sample preparation component sample can be conveniently drilled, and specific component analysis can be carried out.

Description

Technical Field

[0001] This utility model belongs to the field of quality inspection technology in the metallurgical industry, and relates to a bulk material sample forming combination mold. Background Technology

[0002] In the field of metallurgical technology, optimizing steel performance and meeting specific application requirements are key drivers of the industry's continuous progress. To achieve this goal, steel companies often employ a strategy of adding purchased tin ingots, sponge titanium, and other bulk materials as alloying additives to molten steel during the smelting process. These additives, like "seasonings" in the steelmaking process, can precisely adjust and improve the steel's composition, thereby significantly affecting its mechanical properties, corrosion resistance, and processability. They are an indispensable and crucial component of the steelmaking process.

[0003] Tin, a common alloying element, effectively improves the plasticity and toughness of steel when added in the form of tin ingots, while also enhancing its corrosion resistance. Tin-containing steel exhibits unique advantages, particularly in environments requiring resistance to seawater or chemical corrosion. The addition of sponge titanium significantly improves the strength of steel, refines the grain structure, and enhances weldability. Furthermore, in some high-grade steels, titanium can fix nitrogen and reduce aging sensitivity, resulting in more stable performance during long-term service.

[0004] However, to fully realize the potential of these bulk materials as alloying additives, accurate analysis of their specific composition is essential. Compositional analysis is not only fundamental to understanding the chemical composition of materials but also crucial for determining subsequent smelting process parameters and ensuring stable product quality. Through analysis, the precise content of alloying elements can be determined, avoiding performance deviations caused by excess or deficiency, thereby effectively controlling production costs and improving production efficiency.

[0005] However, in practice, the sample preparation process for bulk materials such as tin ingots and sponge titanium is fraught with challenges. Although these materials are relatively soft, their strength is low and their particle size is fine, making traditional sample preparation methods such as drilling and crushing ineffective. During drilling, the weak bonding between material particles easily causes the fine particles to scatter, resulting in sample loss and potentially introducing external contaminants, affecting the accuracy of the analysis. The crushing process, on the other hand, can alter the original structure of the material due to mechanical forces. This is especially true for porous and lightweight materials like sponge titanium, where the destruction of its microstructure can directly lead to deviations in the compositional analysis results, affecting the assessment of the material's true properties.

[0006] Faced with this technical challenge, the metallurgical industry has been actively exploring and developing more efficient and economical sample preparation techniques. One effective approach is to employ cryogenic grinding combined with vacuum encapsulation technology. This involves lightly grinding the material at low temperatures to reduce the impact of thermal effects on the material structure, followed immediately by vacuum encapsulation to prevent oxidation and contamination. Furthermore, laser cutting and micro-sampling technologies also show promising application prospects. They can accurately obtain representative samples without damaging the overall structure of the material, improving the accuracy and reliability of component analysis.

[0007] Meanwhile, with the advancement of technology, the application of automation and intelligent technologies in sample preparation is becoming increasingly widespread. Automated sample preparation equipment can reduce errors caused by human operation and improve sample preparation efficiency, while intelligent analysis systems can monitor the sample preparation process in real time to ensure sample quality. These technological developments have provided strong technical support for the metallurgical industry, making the analysis of the composition of bulk materials more accurate and efficient.

[0008] Therefore, the metallurgical industry still needs to continue researching and developing more efficient and economical sample preparation technologies to meet the urgent need for compositional analysis of bulk materials. Only in this way can the smooth operation of the steel smelting process be ensured, providing strong support for the sustainable development of the steel industry. Utility Model Content

[0009] In view of this, the purpose of this utility model is to provide a bulk material sample forming combination mold to compress bulk materials into large sample blocks, so as to facilitate component analysis after drilling.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A bulk material sample forming combination mold includes a cylindrical cavity mold with a hollow inner cavity. One end of the cavity mold is an inlet end, and the other end is an outlet end. A pressure head is inserted into the cavity mold from the inlet end, and a mold pad is detachably connected to the outlet end. Both ends of the inner wall of the cavity mold are respectively provided with chamfers. A lubricating layer is provided on the inner wall of the cavity mold, the outer wall of the pressure head, and the mold pad.

[0012] Optionally, after pressing, the mold pad is replaced with a demolding device, which is a hollow cylindrical structure. After replacement, the demolding device is connected to the inner cavity of the die.

[0013] Optionally, the inner diameter of the demolding device is greater than or equal to the inner diameter of the die.

[0014] Optionally, the mold pad includes a base and a protrusion connected to each other, the protrusion being inserted into the inner cavity of the mold cavity, and a lubricating layer being provided on the outer wall of the protrusion.

[0015] Optionally, the outer diameter of the protrusion is less than or equal to the inner diameter of the die.

[0016] Optionally, the outer diameter of the base is larger than the outer diameter of the protrusion.

[0017] Optionally, the pressure head includes a chassis and a cylinder connected to each other, the cylinder being inserted into the cavity of the die, and a lubricating layer being provided on the outer wall of the cylinder.

[0018] Optionally, the outer diameter of the cylinder is less than or equal to the inner diameter of the die.

[0019] Optionally, the radial length of the cylinder is greater than the radial length of the die and the ejector, respectively.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention utilizes the plasticity, high elongation, and shrinkage of bulk materials to pour bulk granular materials into a mold and press them into large sample blocks, making it convenient to drill and extract sample components for specific component analysis.

[0022] The inner edge of the die cavity is beveled to form a slope or rounded transition. This operation reduces stress concentration and disperses stress, preventing the die cavity from cracking or being damaged due to stress concentration during use. It also facilitates demolding, making the inner edge smoother, reducing resistance during demolding and preventing product damage. It improves product quality, avoiding burrs or sharp corners on the product edges. It also reduces mold wear and extends service life.

[0023] The inner wall of the die cavity, the outer wall of the cylinder, and the die pad are all equipped with a lubricating layer, which facilitates demolding and ensures the integrity of the shape of the large sample block after pressing.

[0024] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is a schematic diagram of the pressing process for bulk materials.

[0027] Figure 2 This is a schematic diagram of the demolding process for bulk materials;

[0028] Figure 3 This is a schematic diagram of the pressure head;

[0029] Figure 4 This is a schematic diagram of the die cavity;

[0030] Figure 5 This is a schematic diagram of the mold pad;

[0031] Figure 6 Schematic diagram of the demolding device;

[0032] Figure 7 This is a schematic diagram of the beveling of the die.

[0033] Figure label:

[0034] 1. Press head, 11. Base plate, 12. Cylinder, 2. Die, 3. Mold pad, 31. Base, 32. Protrusion, 4. Demolding device, 5. Beveling. Detailed Implementation

[0035] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0037] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] Please see Figures 1 to 7 This is a combined mold for forming bulk material samples, including a hollow cylindrical cavity mold 2, with one end of the cavity mold 2 being the inlet and the other end being the outlet. A pressure head 1 is inserted into the cavity of the cavity mold 2 from the inlet end, and a mold pad 3 is detachably connected to the outlet end. Both ends of the inner wall of the cavity mold 2 are provided with chamfers 5. Lubricating layers are provided on the inner wall of the cavity mold 2, the outer wall of the pressure head 1, and the mold pad 3 to facilitate demolding of large sample blocks after pressing.

[0039] When pressing bulk materials, the die 2 is installed above the die pad 3. The die pad 3 includes a base 31 and a protrusion 32 connected to each other. The protrusion 32 is inserted into the inner cavity of the die 2, and a lubricating layer is provided on the outer wall of the protrusion 32. The outer diameter of the protrusion 32 is less than or equal to the inner diameter of the die 2, and the outer diameter of the base 31 is greater than the outer diameter of the protrusion 32. The inner diameter of the die 2 is preferably 100 mm, the protrusion height of the protrusion 32 of the die pad 3 is 5 mm, the outer diameter is 99.9 mm to 100 mm, the outer diameter of the base 31 is preferably 140 mm, and the thickness of the base 31 is preferably 20 mm.

[0040] The pressing head 1 includes a base 11 and a cylinder 12 connected to each other. A lubricating layer is provided on the outer wall of the cylinder 12. The outer diameter of the cylinder 12 is less than or equal to the inner diameter of the die 2, and the outer diameter of the cylinder 12 is preferably 98 mm. The outer diameter of the base 11 is greater than the outer diameter of the cylinder 12, preferably 160 mm, and the thickness is 20 mm. During pressing, the cylinder 12 is inserted into the inner cavity of the die 2, so that the bulk material in the inner cavity of the die 2 is pressed into shape.

[0041] After pressing, the mold pad 3 is replaced with a demolding device 4. The demolding device 4 is a hollow cylindrical structure. After replacement, the demolding device 4 is connected to the inner cavity of the die 2. The inner diameter of the demolding device 4 is greater than or equal to the inner diameter of the die 2, and the inner diameter of the demolding device 4 is preferably 110 mm. The press head 1 is pressed down further to release the pressed large sample block from the inner cavity of the die 2 into the demolding device 4, thus obtaining the large sample block.

[0042] The radial length of the cylinder 12 is greater than the radial length of the die 2 and the ejector 4. Preferably, the radial length of the cylinder 12 is 260 mm; the radial length of the die 2 is 200 mm; and the radial length of the ejector 4 is 120 mm.

[0043] The operation steps for compressing bulk materials using this invention are as follows:

[0044] S1, determine the amount of bulk material to be added;

[0045] S2, apply an oil film to the inner wall of the die 2, the outer wall of the pressure head 1, and the die pad 3 to form a lubricating layer, which facilitates demolding;

[0046] S3, place the die 2 on the die pad 3, insert the protrusion 32 into the inner cavity of the die 2, pour the material into the inner cavity of the die 2, and insert the pressure head 1;

[0047] S4, Place the mold containing the material onto the base plate of the hydraulic press;

[0048] S5, start the press and apply appropriate pressure to press the material into shape;

[0049] S6, remove the mold pad 3 and replace the mold releaser 4 under the cavity mold 2;

[0050] S7, press to demold, and obtain a large sample block.

[0051] Some bulk or blocky materials have high hardness or high ductility, making it impossible to prepare samples by crushing with a crusher or grinding with a grinder. The bulk material blocks can be pressed into large test blocks by the combination mold of this utility model in combination with the above methods, and then samples can be prepared by drilling.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A combined mold for forming a sample of bulk material, characterized by: The cylindrical concave die (2) is hollow in the inner cavity, one end of which is the inlet end and the other end is the outlet end, the pressure head (1) is inserted into the inner cavity of the concave die (2) from the inlet end, and the die cushion (3) is detachably connected to the outlet end; the inner wall of the concave die (2) is provided with a reverse edge (5) at both ends; the inner wall of the concave die (2), the outer wall of the pressure head (1) and the die cushion (3) are all provided with a lubricating layer.

2. The shaped sample forming modular mold for bulk materials as claimed in claim 1, wherein: After the pressing is completed, the die cushion (3) is replaced with the demolding device (4), which is a hollow cylindrical structure in the inner cavity, and after the replacement, the demolding device (4) is in communication with the inner cavity of the concave die (2).

3. The shaped sample forming modular mold for bulk materials as claimed in claim 2, wherein: The inner diameter of the demolding device (4) is greater than or equal to the inner diameter of the concave die (2).

4. The shaped sample forming modular mold for bulk materials as claimed in claim 1, wherein: The die cushion (3) comprises a base (31) and a protruding part (32) connected to each other, the protruding part (32) is inserted into the inner cavity of the concave die (2), and the outer wall of the protruding part (32) is provided with a lubricating layer.

5. The shaped sample forming modular mold for bulk materials as claimed in claim 4, wherein: The outer diameter of the protruding part (32) is less than or equal to the inner diameter of the concave die (2).

6. The shaped sample forming modular mold for bulk materials as claimed in claim 4, wherein: The outer diameter of the base (31) is greater than the outer diameter of the protruding part (32).

7. The shaped sample forming modular mold for bulk materials as claimed in claim 2, wherein: The pressure head (1) comprises a base plate (11) and a cylindrical body (12) connected to each other, the cylindrical body (12) is inserted into the inner cavity of the concave die (2), and the outer wall of the cylindrical body (12) is provided with a lubricating layer.

8. The shaped sample forming modular mold for bulk materials as claimed in claim 7, wherein: The outer diameter of the cylindrical body (12) is less than or equal to the inner diameter of the concave die (2).

9. The shaped sample forming modular mold of bulk material according to claim 7, wherein: The radial length of the cylindrical body (12) is greater than the radial length of the concave die (2) and the demolding device (4), respectively.

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