A powder material pressing mold

Abstract

The utility model belongs to the field of powder material pressing and forming, and specifically relates to a powder material pressing and forming die, including a bottom plate, an inner column, an inner mold and a multi-petal outer mold; the inner column is arranged on the bottom plate, and the upper end of the inner column protrudes from the upper end of the bottom plate; the multi-petal outer mold is detachably enclosed to form an annular structure, the lower inner wall of the annular structure cooperates with the outer side of the bottom plate, and the upper inner wall and the outer wall of the protruding part of the inner column are spaced; the inner mold is slidably arranged in the space; the bottom wall of the inner mold, the top wall of the bottom plate, the outer wall of the inner column and the inner wall of the multi-petal outer mold are enclosed to form a closed product pressing cavity. The powder material pressing and forming die of the utility model is extremely convenient and quick for the loading of raw materials and the disassembly of finished products, and has few steps of forming and convenient operation.

Description

Technical Field

[0001] The utility model belongs to the field of powder material pressing and forming, in particular to a powder material pressing and forming die. Background Art

[0002] As a lightweight, high-strength, multifunctional composite material, ceramic particle reinforced aluminum matrix composite material has excellent physical and chemical properties such as low density, high specific strength, high specific stiffness, high wear resistance, low thermal expansion coefficient, high thermal conductivity and good corrosion resistance. It is a promising structural material and has been rapidly developed in recent years. Composite materials prepared by different formula component contents, different preparation processes and heat treatment processes have different properties and can meet the application requirements of space engineering materials and electronic packaging.

[0003] In the preparation process of ceramic particle reinforced metal matrix composite materials, the most important part is how to add the reinforced particles into the matrix metal evenly or in the required distribution mode, and control the volume fraction and other parameters of the particles as needed to achieve the purpose of preparing the required target material. At present, the commonly used methods for preparing particle reinforced aluminum matrix composite materials include stirring casting, liquid metal infiltration, spray deposition, powder metallurgy, etc. For powder metallurgy, taking the Chinese utility model patent "CN205615050U-A hot pressing mold assembly and isometric hot press for easy mold replacement" as an example, the current mold structure scheme is relatively complicated, and the powder feeding and finished product separation operations are complicated, which leads to low molding efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a powder material pressing and forming die which has the advantages of convenient and quick die assembly, simple structure, convenient and stable forming process and high forming efficiency.

[0005] The utility model provides a powder material pressing and forming die, comprising a bottom plate, an inner column, an inner die and a multi-petal outer die;

[0006] The inner column is arranged on the bottom plate, and the upper end of the inner column protrudes from the upper end of the bottom plate;

[0007] The multi-petal outer mold can be detachably enclosed to form an annular structure, the inner wall of the lower end of the annular structure is matched with the outer side of the bottom plate, and the inner wall of the upper side is spaced from the outer wall of the protruding part of the inner column;

[0008] The inner mold is slidably disposed in the interval, and the outer wall of the inner mold cooperates with the inner wall of the annular structure, and the inner wall cooperates with the outer wall of the protruding portion of the inner column;

[0009] The bottom wall of the inner mold, the top wall of the bottom plate, the outer wall of the inner column and the inner wall of the multi-petal outer mold together form a closed product pressing cavity.

[0010] Furthermore, the powder material pressing and molding die also includes a heating device for heating the product to be molded in the product pressing cavity.

[0011] Furthermore, the heating device includes two heating electrodes, which are used to connect the surfaces of the inner mold and the base plate and form a short circuit, so that the base plate, inner column, inner mold and multi-petal outer mold are heated.

[0012] Furthermore, the base plate, the inner column, the inner mold and the multi-petal outer mold are made of graphite.

[0013] Furthermore, a temperature measuring hole is provided on the outer wall of the outer mold, and the temperature measuring hole is used to install a temperature sensor probe.

[0014] Furthermore, the multi-petal outer mold structure is consistent.

[0015] Furthermore, the powder material pressing mold also includes a clamp, which is sleeved outside the multi-petal outer mold to fix the multi-petal outer mold.

[0016] Furthermore, the upper end of the inner mold protrudes beyond the upper ends of the outer mold and the inner column.

[0017] Furthermore, the upper end surfaces of the inner mold and the multi-petal outer mold are provided with a hoisting installation structure.

[0018] Furthermore, the outer wall of the inner column is a cylindrical structure, and the inner walls of multiple outer molds are surrounded to form an inner cylindrical surface structure.

[0019] The beneficial effect of the utility model is that the powder material pressing and forming mold of the utility model is extremely convenient and quick for the loading of raw materials and the disassembly of finished products, and the overall structure is simple. The multi-petal structure of the outer mold can facilitate the assembly of the mold and the disassembly of the product after molding, thereby improving the molding efficiency. To form the product, it is only necessary to fix the bottom plate, the inner column and the combined multi-petal outer mold on the platform and apply pressure to the inner mold, which has few molding steps and is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Attached Figure 2 It is a top view of the utility model;

[0022] Attached Figure 3 It is a front cross-sectional view of the utility model;

[0023] Attached Figure 4 It is a front cross-sectional view of the bottom plate of the utility model;

[0024] Attached Figure 5 For attachment Figure 4 A partial enlarged view of the middle A;

[0025] Attached Figure 6 It is a structural schematic diagram of the outer mold in the utility model;

[0026] Attached Figure 7 It is a front cross-sectional view of the outer mold in the utility model.

[0027] In the figure, 1-bottom plate; 11-step; 2-inner column; 3-inner mold; 4-clamp; 5-outer mold; 51-temperature measuring hole; 6-product pressing cavity; 7-product. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] As attached Figure 1 -Attached Figure 7 As shown, the utility model provides a powder material pressing and molding die, which is used to press and mold powder materials, such as composite material pressing and molding, specifically metal powder plus ceramic powder, which forms a ceramic particle reinforced metal-based product 7 after pressing and molding. Preferably, the pressed product 7 is a disc-shaped structure with a through hole in the middle, such as a brake disc.

[0034] The powder material pressing and forming die comprises a base plate 1, an inner column 2, an inner die 3 and a multi-petal outer die 5;

[0035] The inner column 2 is arranged on the bottom plate 1, and the upper end of the inner column 2 protrudes from the upper end of the bottom plate 1, wherein the bottom plate 1 and the inner column 2 can be integrally formed as one component, or can be a split structure that can be detachably installed. Preferably, the bottom plate 1 and the inner column 2 adopt a split structure, so that it is convenient to remove the inner column 2 from the bottom plate 1 after the product 7 is formed, so as to facilitate the removal of the product 7. More preferably, a sliding hole is provided on the bottom plate 1, and the inner column 2 is slidably arranged on the sliding hole, so as to further facilitate the assembly and disassembly of the inner column 2;

[0036] The multi-petal outer mold 5 is detachably enclosed to form an annular structure, wherein the multi-petal outer mold 5 is connected end to end, and its inner wall is adapted to the inner mold 3 and the outer wall of the bottom plate 1, and the inner wall at the lower end of the annular structure is matched with the outer side of the bottom plate 1, preferably using an interference fit, and there is a gap between the upper inner wall and the outer wall of the protruding part of the inner column 2 (i.e., the part of the inner column 2 protruding from the upper end of the bottom plate 1), and the gap is an annular gap cavity;

[0037] The inner mold 3 is slidably arranged in the interval, and the outer wall of the inner mold 3 cooperates with the inner wall of the annular structure. Preferably, the outer wall of the inner mold 3 slides and fits tightly with the inner wall of the annular structure, that is, the outer wall of the inner mold 3 is consistent with the cross-sectional shape of the inner wall of the annular structure, such as interference fit, and the inner wall of the inner mold 3 cooperates with the outer wall of the protruding part of the inner column 2. Preferably, the inner wall of the inner mold 3 and the outer wall of the protruding part of the inner column 2 (that is, the part of the inner column 2 protruding from the upper end of the bottom plate 1) slide and fit tightly, that is, the inner wall of the inner mold 3 is consistent with the cross-sectional shape of the outer wall of the protruding part of the inner column 2, such as interference fit; wherein, the inner mold 3 is slidably arranged in the interval, thereby facilitating the pressing and demolding operations of the inner mold 3; the outer mold 5 adopts a multi-petal splicing method, which greatly improves the convenience of demolding.

[0038] The bottom wall of the inner mold 3, the top wall of the bottom plate 1, the outer wall of the inner column 2 and the inner wall of the multi-petal outer mold 5 enclose a closed product pressing cavity 6. In the product pressing cavity 6, the bottom wall of the inner mold 3 can move toward or away from the top wall of the bottom plate 1. When the bottom wall of the inner mold 3 moves toward the top wall of the bottom plate 1, pressure is applied to the inner mold 3, and then the powder material is pressed through the lower wall of the inner mold 3. During specific use, the top of the inner mold 3 is connected to a pressing device, and pressure is applied to the inner mold 3 by the pressing device to achieve pressing and molding of the powder material.

[0039] The powder material pressing and forming mold provided by the utility model, in the process of pressing the product, firstly install the inner column 2 on the bottom plate 1, then enclose multiple outer molds 5 on the outer wall of the bottom plate 1 and assemble the multiple outer molds 5, at this time, the inner wall of the multi-petal outer mold 5 and the outer wall of the protruding part of the inner column 2 have a gap, and the bottom wall of the gap is the top wall of the bottom plate 1, at this time, place a set amount of powder material to be formed in the gap, and then slide the lower end of the inner mold 3 into the gap to form a closed product pressing cavity 6, and complete the preparation work of pressing and forming, and then only need to apply downward pressure to the upper end of the inner mold 3 to compress the height of the product pressing cavity 6, and the powder material can be pressed and formed. In the process of unloading the product of demolding, firstly split the multi-petal outer mold 5, and then remove the inner mold 3, at this time, because the outer mold 5 has been removed, the removal of the inner mold 3 is more convenient and quick, and then the inner column 2 is disassembled, and then the formed product 7 is only overlapped on the upper wall of the bottom plate 1, and finally the product 7 is transferred from the bottom plate 1.

[0040] That is, the powder material pressing and forming mold of the utility model is extremely convenient and quick for the loading of raw materials and the disassembly of finished products, and the overall structure is simple. The multi-petal structure of the outer mold 5 can facilitate the assembly of the mold and the disassembly of the product 7 after molding, thereby improving the molding efficiency. To form the product 7, it is only necessary to fix the bottom plate 1, the inner column 2 and the assembled multi-petal outer mold 5 on the platform and apply pressure to the inner mold 3, which has few molding steps and is convenient to operate.

[0041] In one embodiment, the powder material pressing mold also includes a heating device for heating the product to be formed 7 in the product pressing cavity 6. In this embodiment, it is suitable for powder materials that require a specific temperature for pressing and forming, such as the pressing and forming of metal powder and ceramic powder. By setting up a heating device, the powder material can be heated before and during the pressing process to melt the metal powder and wrap the ceramic particles, and finally form a ceramic particle reinforced metal matrix composite material hot-pressed product 7.

[0042] The heating device may adopt existing heating methods such as resistance heating and induction heating. In one preferred embodiment, the heating device includes two heating electrodes and a power supply, and the two heating electrodes are used to connect the surface of the inner mold 3 and the bottom plate 1 and form a short circuit, so that the bottom plate 1, the inner column 2, the inner mold 3 and the multi-petal outer mold 5 are heated, and then the heat is transferred to the powder material in the product pressing cavity 6, while ensuring the uniformity of heating.

[0043] In one of the embodiments, the base plate 1, the inner column 2, the inner mold 3 and the multi-petal outer mold 5 are made of graphite material. The graphite material has good high temperature resistance and thermal conductivity, and can generate heat and transfer heat to the powder material very well, thereby improving the heating effect of the powder material. At the same time, the graphite material has good chemical stability and is not easy to react chemically with the powder material.

[0044] In one embodiment, the outer wall of the outer mold 5 is provided with a temperature measuring hole 51, and the temperature measuring hole 51 is used to install a temperature sensor probe, thereby conveniently monitoring the heating temperature of the heating device and conveniently monitoring the temperature acting on the powder material.

[0045] In one embodiment, the multi-petal outer mold 5 has a consistent structure, which can facilitate the production and processing of the outer mold 5 and reduce the production cost of the mold. For example, when the annular structure is a hollow cylindrical structure, the multi-petal outer mold 5 is an arc-shaped piece, and when the annular structure is a hollow rectangular structure, the multi-petal outer mold 5 is a right-angle piece.

[0046] In one of the embodiments, the powder material pressing mold further includes a clamp 4, which is sleeved outside the multi-petal outer mold 5 to fix the multi-petal outer mold 5. In this embodiment, the assembly and disassembly of the multi-petal outer mold 5 are realized by the clamp 4. When the multi-petal outer mold 5 needs to be assembled, after the multi-petal outer mold 5 is aligned, the multi-petal outer mold 5 is fixed and tightened by the clamp 4, thereby realizing the assembly of the multi-petal outer mold 5. When the multi-petal outer mold 5 needs to be disassembled, the clamp 4 needs to be loosened, and the multi-petal outer mold 5 can be separated laterally. The assembly and disassembly process of the entire multi-petal outer mold 5 is convenient and quick. Preferably, the clamp 4 is an adjustable tightness structure, thereby improving the stability and reliability of the multi-petal outer mold 5 after assembly, and facilitating the disassembly work. Preferably, the clamp 4 is made of stainless steel to ensure the cost.

[0047] In one embodiment, the upper end of the inner mold 3 protrudes from the upper ends of the outer mold 5 and the inner mold 2. In this embodiment, it is convenient for the pressure-applying device to apply pressure to the upper end of the inner mold 3, thereby simplifying the difficulty of product pressing.

[0048] In one embodiment, the upper end surfaces of the inner mold 3 and the multi-petal outer mold 5 are provided with a hoisting installation structure, so as to facilitate the hoisting of the inner mold 3 and the outer mold 5. When the mold is large and heavy, the assembly and disassembly of the mold can be completed conveniently through the hoisting equipment. In addition, the upper end surfaces of the clamp 4 and the inner column 2 can also be provided with a hoisting installation structure. Preferably, the hoisting installation structure is a threaded hole, and a hook can be screwed on the threaded hole, and the hoisting equipment completes the hoisting by connecting with the hook.

[0049] In one of the specific application embodiments, the outer wall of the inner column 2 is a cylindrical structure; the inner walls of multiple outer molds 5 are enclosed to form an inner cylindrical surface structure. In this embodiment, the powder material pressing mold presses and forms a disc-shaped product 7. Of course, the structure formed by the outer wall of the inner column 2 and the inner walls of multiple outer molds 5 can also be other shapes, so as to process a product 7 of a specific shape. Moreover, the bottom wall of the inner mold 3 and the top wall of the bottom plate 1 within the product pressing cavity 6 can be plane or other configurations, so as to form the product as needed. For example, a step 11 is set on the top wall of the bottom plate 1, so as to form a convex ring in the middle of the product 7, and finally form a product 7 with a brake disc configuration.

[0050] The above is only an embodiment and does not limit the present invention in any way. Any person skilled in the art can make many possible changes, modifications or modifications to the present invention without departing from the scope of the present invention by using the above disclosed technical contents. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the present invention should fall within the scope of protection of the present invention.

Claims

1. A powder material pressing mold, characterized in that: It comprises a base plate (1), an inner column (2), an inner mold (3) and a multi-petal outer mold (5); The inner column (2) is arranged on the base plate (1), and the upper end of the inner column (2) protrudes from the upper end of the base plate (1); The multiple petals of the outer mold (5) are detachably enclosed to form an annular structure, the inner wall of the lower end of the annular structure cooperates with the outer side of the bottom plate (1), and the inner wall of the upper side is spaced from the outer wall of the protruding part of the inner column (2); The inner mold (3) is slidably arranged in the interval, and the outer wall of the inner mold (3) cooperates with the inner wall of the annular structure, and the inner wall cooperates with the outer wall of the protruding part of the inner column (2); The bottom wall of the inner mold (3), the top wall of the bottom plate (1), the outer wall of the inner column (2) and the inner wall of the multi-petal outer mold (5) together form a closed product pressing cavity (6).

2. The powder material pressing mold according to claim 1, characterized in that: It also comprises a heating device for heating the product to be formed (7) in the product pressing cavity (6).

3. The powder material pressing mold according to claim 2, characterized in that: The heating device comprises two heating electrodes, which are used to connect the inner mold (3) and the surface of the bottom plate (1) and form a short circuit, so that the bottom plate (1), the inner column (2), the inner mold (3) and the multi-petal outer mold (5) are heated.

4. The powder material pressing mold according to claim 3, characterized in that: The base plate (1), the inner column (2), the inner mold (3) and the multi-petal outer mold (5) are made of graphite.

5. The powder material pressing mold according to claim 2, characterized in that: The outer wall of the outer mold (5) is provided with a temperature measuring hole (51), and the temperature measuring hole (51) is used to install a temperature sensor probe.

6. The powder material pressing mold according to any one of claims 1 to 5, characterized in that: The outer mold (5) of the multiple petals has the same structure.

7. The powder material pressing mold according to any one of claims 1 to 5, characterized in that: It also comprises a clamp (4), wherein the clamp (4) is sleeved outside the multi-petal outer mold (5) to fix the multi-petal outer mold (5).

8. The powder material pressing mold according to any one of claims 1 to 5, characterized in that: The upper end of the inner mold (3) protrudes from the upper ends of the outer mold (5) and the inner column (2).

9. The powder material pressing mold according to any one of claims 1 to 5, characterized in that: The upper end surfaces of the inner mold (3) and the multi-petal outer mold (5) are provided with a hoisting installation structure.

10. The powder material pressing mold according to any one of claims 1 to 5, characterized in that: The outer wall of the inner column (2) is a cylindrical structure, and the inner walls of the plurality of outer molds (5) are enclosed to form an inner cylindrical surface structure.

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