CN211842479U - Hot-pressing die for preparing regular ceramic products - Google Patents
Hot-pressing die for preparing regular ceramic products Download PDFInfo
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- CN211842479U CN211842479U CN202020050376.4U CN202020050376U CN211842479U CN 211842479 U CN211842479 U CN 211842479U CN 202020050376 U CN202020050376 U CN 202020050376U CN 211842479 U CN211842479 U CN 211842479U
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Abstract
The utility model provides a hot pressing die for preparation of regular ceramic product, hot pressing die's main part includes at least one cylindrical die cavity, every the vertical three piece at least backplate that are equipped with in the die cavity, the backplate encloses into closed area, the packing has the forming raw materials the same with closed area cross sectional shape, size in the closed area. The hot pressing die of the utility model avoids the problems of irregular product shape at the edge part of the die cavity and more unnecessary corner products when the ceramic raw material is filled through the dispersed design of the plurality of die cavities, improves the yield of the ceramic product and is beneficial to the promotion of the subsequent processing efficiency; the hot-pressing die is suitable for preparing regular products in different shapes, reduces the waste of raw materials and is low in cost.
Description
Technical Field
The utility model belongs to the technical field of the mould, a hot pressing die for regular ceramic product preparation is related to.
Background
The die method is a method commonly used in the preparation of ceramic products, and particularly for the preparation of products with specific shapes, the die method also has corresponding requirements. The ceramic product is usually prepared by a hot pressing method, and generally comprises the steps of powder mixing, die filling, hot pressing, machining and the like, wherein the die filling process is a key factor for determining the shape of the product and directly determines the sintering quality of the ceramic product and the yield of machining. Therefore, for products with different shapes, if the same mold structure is adopted, the applicability is poor, and raw material waste is caused.
At present, the structural schematic diagram of a commonly used mold is shown in fig. 1, wherein a mold cavity is generally a whole, raw materials are pressed into a required shape in advance and are tightly filled in the mold cavity, but the shape of the mold cavity is not matched with that of a product, a round of the mold cavity is often filled with leftover materials, but the blank cannot be used as a normal product, so that raw materials are wasted, meanwhile, the shape of the blank of the edge of the mold cavity is irregular after the product is discharged from the furnace, more allowance needs to be reserved on the design of the blank, and otherwise, the yield of the processed product can be reduced. Taking the preparation of a regular hexagon boron nitride product as an example, a mold cavity is formed by enclosing a quadrilateral by adopting baffles, and a circle of the mold cavity is filled with a triangular cold pressing piece and a semi-hexagonal boron carbide cold pressing piece during filling, but the mold cavity cannot be used as a product, so that great loss is caused.
CN 109109142A discloses a graphite mold for hot-pressing sintering AlON transparent ceramics, which comprises a mold main body and a base, wherein the mold main body comprises a central cavity, and the cavity of the mold is provided with a taper; the upper part and the lower part of the die main body are respectively provided with a step part, and the upper part of the base is provided with a boss part corresponding to the step part; the graphite mold is also of an integral cavity structure and only has a single filling space, and the defects of irregular shape of the product at the edge of the cavity and more leftover products at present still exist. CN 106278284a discloses a method for preparing boron nitride ceramic material by using annular graphite mold step-by-step sintering, which is to mix and granulate BN-based powder, additive and sintering aid, then put into the annular graphite mold, and perform step-by-step hot pressing sintering.
In summary, for the preparation of ceramic products with regular shapes, in order to ensure the regularity of the product shapes, improve the yield of the products and reduce waste, the structure of the mold and the filling manner of raw materials need to be improved.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model aims to provide a hot pressing die for regular ceramic product preparation, hot pressing die is through the dispersed design of a plurality of die cavitys, and die cavity edge part's product shape is irregular and the more problem of corner product when having avoided ceramic raw materials to load has improved ceramic product's yields, helps follow-up machining efficiency's promotion.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a hot pressing die for preparation of regular ceramic product, hot pressing die's main part includes at least one cylindrical die cavity, every the vertical three piece at least backplate that are equipped with in the die cavity, the backplate encloses into closed area, the packing has the forming raw materials the same with closed area cross sectional shape, size in the closed area.
The utility model discloses in, hot pressing mold designs the die cavity decentralization, and every product corresponds a die cavity, and the equipment of backplate can form the space of loading that has different shape cross sections in the die cavity simultaneously to adapt to the needs of different shape products, so design not only reduced the production of the unnecessary shape product in edge when adopting whole die cavity, also guaranteed the regularity of product, be favorable to subsequent processing, avoid the waste of product.
The number of the die cavities can be one, three, five, eight, twelve or fifteen, and the like, and the number of the die cavities is determined according to the size of a single product and the size of the whole hot-pressing die; the number of the guard plates is determined according to the shape of the product, and at least three guard plates need to be capable of enclosing a closed area.
Following conduct the utility model discloses preferred technical scheme, nevertheless do not conduct the utility model provides a technical scheme's restriction, through following technical scheme, can reach and realize better the utility model discloses a technical purpose and beneficial effect.
As the utility model discloses preferred technical scheme, hot pressing die's main part is graphite module, graphite module wholly is cylindrically.
The utility model discloses in, graphite hot pressing mould is the mould of the ceramic product preparation commonly used at present, and used graphite jig is isostatic pressing graphite soon, helps the transmission of hot pressing in-process pressure, guarantees the homogeneity of gained product.
As the utility model discloses preferred technical scheme, the backplate includes the graphite backplate, the degree of depth of the height of backplate and die cavity is the same.
As the utility model discloses preferred technical scheme, the side edge of backplate meets and constitutes side confined right prism, the side edge and the cylindrical die cavity of right prism meet.
The utility model discloses in, to the preparation of specific shape product to the backplate constitutes corresponding shape in the die cavity, this right prism can be internal joint in cylindrical die cavity, and the lateral edge not with the die cavity direct contact when, can be connected to die cavity inner wall through the backplate and fix.
As the preferable technical proposal of the utility model, the cross section of the right prism is in the shape of a regular hexagon or a regular pentagon.
As the preferred technical proposal of the utility model, the molding raw material is any one of boron carbide, boron nitride or silicon carbide.
As a preferred technical solution of the present invention, each mold cavity is filled with at least one layer of molding material, such as one, three, five, six, eight or ten layers.
When the forming raw materials have more than two layers, carbon paper, preferably graphite paper, is arranged between the forming raw materials.
The utility model discloses in, load multilayer shaping raw materials in proper order in the die cavity, in order to avoid the raw materials to combine together at hot pressing process, lay carbon paper between the raw materials, the separation after the reaction product of being convenient for takes out.
As the utility model discloses preferred technical scheme, the bottom of die cavity is equipped with the graphite cushion, and every at least one deck shaping raw materials sets up a graphite cushion again, for example one deck, two-layer or three-layer etc. its quantity is relevant with the kind of raw materials and the thickness of monolithic raw materials.
The utility model discloses in, when the raw materials set up the multilayer, when the hot-pressing reaction exerted pressure, pressure can steadilyd decrease inevitably, consequently sets up the graphite cushion between the shaping raw materials, utilizes its transmission pressure's characteristic to keep different positions raw materials pressure balanced to obtain the better product of homogeneity.
As the preferred technical scheme of the utility model, the shape and the size of graphite cushion block cross section are the same with forming raw materials.
As the utility model discloses preferred technical scheme, the back is filled to the die cavity, and the top is equipped with the graphite pressure head.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the hot pressing die of the utility model avoids the problems of irregular product shape at the edge part of the die cavity and more unnecessary corner products when the ceramic raw materials are filled by the dispersed design of the plurality of die cavities, improves the yield of ceramic products, can reach more than 98 percent and is beneficial to the promotion of the subsequent processing efficiency;
(2) hot pressing die is applicable to the preparation of different shape rule products, has reduced the waste of raw materials, and the cost is lower.
Drawings
Fig. 1 is a schematic structural diagram of a conventional mold provided in the background of the present invention;
fig. 2 is a schematic structural diagram of a hot pressing mold for preparing a regular hexagonal boron carbide ceramic product provided in embodiment 1 of the present invention;
fig. 3 is a cross-sectional view of a-a plane in fig. 2 provided in embodiment 1 of the present invention;
the method comprises the following steps of 1-graphite module, 2-mold cavity, 3-guard plate, 4-molding raw material, 5-graphite cushion block and 6-graphite pressure head.
Detailed Description
To better explain the technical solution of the present invention, it is convenient to understand the technical solution of the present invention, and the following is further detailed description of the present invention, but the following embodiments are only simple examples of the present invention, and do not represent or limit the protection scope of the present invention, and the protection scope of the present invention is subject to the claims.
The utility model discloses embodiment mode part provides a hot pressing die for regular ceramic product preparation, hot pressing die's main part includes at least one cylindrical die cavity 2, every the vertical three piece at least backplate 3 that are equipped with in the die cavity 2, the backplate encloses into closed area, the packing has the forming raw materials 4 the same with closed area cross sectional shape, size in the closed area.
The following are typical but non-limiting examples of the present invention:
example 1:
the embodiment provides a hot pressing die for preparing a regular hexagonal boron carbide ceramic product, the structural schematic diagram of the hot pressing die is shown in fig. 2, wherein a cross section of a-a surface in fig. 2 is shown in fig. 3, a main body part of the hot pressing die comprises twelve cylindrical die cavities 2, six guard plates 3 are vertically arranged in each die cavity 2, the guard plates 3 enclose a closed area with a regular hexagonal cross section, and a forming raw material 4 boron carbide cold pressing piece with the same shape and size as the cross section of the closed area is filled in the closed area.
The main body part of the hot-pressing die is a graphite module 1, and the graphite module 1 is integrally cylindrical.
The guard plate 3 is a graphite guard plate, and the height of the guard plate 3 is the same as the depth of the die cavity 2.
The side edges of the guard plates 3 are connected to form a straight prism with a closed side surface, and the side edges of the straight prism are directly contacted with the cylindrical die cavity 2.
Each die cavity 2 is filled with ten layers of boron carbide cold pressing pieces, and two pieces of graphite paper are arranged between two adjacent layers of cold pressing pieces.
The bottom of the die cavity 2 is provided with a graphite cushion block 5, and every two layers of boron carbide cold pressing pieces are provided with another graphite cushion block 5; the shape and the size of the cross section of the graphite cushion block 5 are the same as those of the boron carbide cold pressing piece.
After the die cavity 2 is filled, a graphite pressure head 6 is arranged above the die cavity.
Example 2:
the embodiment provides a hot-pressing die for preparing a regular hexagonal boron carbide ceramic product, the main body part of the hot-pressing die comprises ten cylindrical die cavities 2, six guard plates 3 are vertically arranged in each die cavity 2, the guard plates 3 enclose a closed area with a regular hexagonal cross section, and a forming raw material 4-boron carbide cold pressing piece with the same shape and size as the cross section of the closed area is filled in the closed area.
The main body part of the hot-pressing die is a graphite module 1, and the graphite module 1 is integrally cylindrical.
The guard plate 3 is a graphite guard plate, and the height of the guard plate 3 is the same as the depth of the die cavity 2.
The side edges of the guard plate 3 are connected to form a straight prism with a closed side, the side edges of the straight prism are not directly contacted with the cylindrical die cavity 2, and then the guard plate 2 is connected with the cylindrical die cavity 2 to be fixed.
Eight layers of boron carbide cold pressing pieces are filled in each die cavity 2, the bottom of each die cavity 2 is provided with a graphite cushion block 5, the boron carbide cold pressing pieces and the graphite cushion blocks 5 are arranged alternately, and two pieces of graphite paper are arranged between the boron carbide cold pressing pieces and the graphite cushion blocks; the shape and the size of the cross section of the graphite cushion block 5 are the same as those of the boron carbide cold pressing piece.
After the die cavity 2 is filled, a graphite pressure head 6 is arranged above the die cavity.
Example 3:
the embodiment provides a hot-pressing die for preparing a boron nitride product, the main body part of the hot-pressing die comprises fifteen cylindrical die cavities 2, five guard plates 3 are vertically arranged in each die cavity 2, the guard plates 3 enclose a closed area with a regular pentagon cross section, and a forming raw material 4-boron nitride cold-pressing piece with the same shape and size as the cross section of the closed area is filled in the closed area.
The main body part of the hot-pressing die is a graphite module 1, and the graphite module 1 is integrally cylindrical.
The guard plate 3 is a graphite guard plate, and the height of the guard plate 3 is the same as the depth of the die cavity 2.
The side edges of the guard plates 3 are connected to form a straight prism with a closed side surface, and the side edges of the straight prism are directly contacted with the cylindrical die cavity 2.
Six layers of boron nitride cold pressing pieces are filled in each die cavity 2, and two pieces of graphite paper are arranged between two adjacent layers of cold pressing pieces.
The bottom of the die cavity 2 is provided with a graphite cushion block 5, and every two layers of cold pressing parts are provided with another graphite cushion block 5; the shape and the size of the cross section of the graphite cushion block 5 are the same as those of the boron nitride cold pressing piece.
After the die cavity 2 is filled, a graphite pressure head 6 is arranged above the die cavity.
In the embodiment 1-3, the preparation of the hot pressing mold requires digging a plurality of mold cavities 2 on a graphite module 1, the mold cavities 2 are distributed as uniformly as possible, then a middle mold cavity area with the same cross section as the shape of the required product is formed by assembling and enclosing the mold cavities by a protection plate 3, the middle mold cavity area is filled with molding raw materials 4, a graphite cushion block 5 needs to be placed at the bottom of the mold cavity 2 during filling, then two pieces of graphite paper are laid, then a plurality of molding raw materials 4 are placed, the graphite paper also needs to be laid between the molding raw materials 4, the graphite cushion block 5 is placed on the graphite cushion block 5, the number of the molding raw materials 4 between the two graphite cushion blocks 5 is related to the types of the raw materials and the thickness of a single raw material until the.
According to the embodiment, the hot-pressing die has the advantages that by the aid of the disperse design of the die cavities, the problems that the shapes of products at the edge parts of the die cavities are irregular and more products are not needed at corners when ceramic raw materials are filled are solved, the yield of ceramic products is improved, the yield can reach more than 98%, and the subsequent processing efficiency is improved; the hot-pressing die is suitable for preparing regular products in different shapes, reduces the waste of raw materials and is low in cost.
The present invention is described in the above embodiments, but the present invention is not limited to the above detailed device, i.e. the present invention must rely on the above device to implement. It should be clear to those skilled in the art that any improvement of the present invention, to the addition of the equivalent replacement and auxiliary structure of the device of the present invention, the selection of the specific mode, etc., all fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. The hot pressing die for preparing regular ceramic products is characterized in that the main body of the hot pressing die comprises at least one cylindrical die cavity, at least three guard plates are vertically arranged in each die cavity, each guard plate is enclosed into a closed area, and forming raw materials with the same shape and size as the cross section of the closed area are filled in the closed area.
2. The hot-pressing mold for regular ceramic product preparation according to claim 1, wherein the main body part of the hot-pressing mold is a graphite module, and the graphite module is cylindrical as a whole.
3. The hot-pressing mold for regular ceramic product production as claimed in claim 1, wherein the shield comprises a graphite shield having a height equal to a depth of the mold cavity.
4. The hot-pressing mold for the preparation of regular ceramic products as claimed in claim 1, wherein the side edges of the protecting plates are connected to form a closed-sided right prism, and the side edges of the right prism are connected to the cylindrical mold cavity.
5. The hot-pressing mold for the preparation of regular ceramic products according to claim 4, wherein the cross-sectional shape of the right prism is a regular hexagon or a regular pentagon.
6. The hot-pressing mold for regular ceramic product preparation according to claim 1, wherein the molding raw material is any one of boron carbide, boron nitride or silicon carbide.
7. The hot-pressing mold for the preparation of regular ceramic products as claimed in claim 1, wherein each cavity is filled with at least one layer of molding material;
when the forming raw materials have more than two layers, carbon paper is arranged between the forming raw materials.
8. The hot-pressing mold for the manufacture of regular ceramic products as claimed in claim 7, wherein the bottom of the mold cavity is provided with a graphite block, and one graphite block is provided for every other at least one layer of molding material.
9. The hot-pressing mold for the preparation of regular ceramic products as claimed in claim 8, wherein the graphite blocks have the same shape and size of cross section as the molding material.
10. A hot-pressing mould for the preparation of regular ceramic products according to claim 1, characterized in that a graphite head is provided above the mould cavity after it has been filled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020050376.4U CN211842479U (en) | 2020-01-10 | 2020-01-10 | Hot-pressing die for preparing regular ceramic products |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020050376.4U CN211842479U (en) | 2020-01-10 | 2020-01-10 | Hot-pressing die for preparing regular ceramic products |
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| Publication Number | Publication Date |
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| CN211842479U true CN211842479U (en) | 2020-11-03 |
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| CN202020050376.4U Active CN211842479U (en) | 2020-01-10 | 2020-01-10 | Hot-pressing die for preparing regular ceramic products |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315400 no.198 Anshan Road, Yuyao City, Ningbo City, Zhejiang Province Patentee after: Ningbo Jiangfeng hot isostatic pressing technology Co.,Ltd. Address before: 315400 no.198 Anshan Road, Yuyao City, Ningbo City, Zhejiang Province Patentee before: Ningbo Jiangfeng Powder Metallurgy Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |