Synthesis cavity and sintering mold of polycrystalline diamond compact

Abstract

The utility model discloses a synthesis chamber and sintering mould of polycrystalline diamond compact, including boride ceramic tank, boride ceramic end cover is tightly covered on the top port of boride ceramic tank through lock catch, and the left side of boride ceramic tank is provided with vacuum draw-off pump, a cylindrical cavity is formed in the boride ceramic tank body, and a cavity is formed in the boride ceramic end cover. According to the technical scheme, the boride ceramic tank serves as a mold, the mica inner barrel with the heat insulation function is arranged in the tank body and matched with the boride ceramic tank to achieve the heat preservation function of the first layer, the interior of the tank body and the interior of the tank cover are set to be in the hollow state, the vacuum pump is used for pumping air in the tank body and the tank cover, and the heat preservation function of the second layer is achieved in the pseudo-vacuum state. And meanwhile, the synthesis cavity in the tank body is divided into four parts by the four vertical plates which are arranged in an annular array, so that the effect of sintering a plurality of polycrystalline diamond compacts at the same time is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of polycrystalline diamond compact synthesis appliances, and particularly relates to a synthesis chamber and a sintering die for polycrystalline diamond compacts. Background Art

[0002] Polycrystalline diamond compacts belong to a new type of high-hardness functional material, which are sintered from diamond micropowder and a cemented carbide substrate under ultra-high pressure and high temperature conditions. Since the sintering environment needs to have high pressure and high temperature, an environment above 1200°C usually needs to be created in the sintering die, and it is a difficult problem to maintain the ultra-high temperature environment. Insufficient heat preservation of the sintering die will lead to the inability to continuously supply the environment above 1200°C, and thus more energy consumption is required for supplementary supply. In combination with the above viewpoints, a synthesis chamber and a sintering die for polycrystalline diamond compacts that can solve the above problems are provided. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a technical solution for a synthesis chamber and a sintering die for polycrystalline diamond compacts to solve the deficiencies mentioned in the background art. In order to solve the drawbacks and defects described in the background art, the technical solution has the following content:

[0004] It includes a boride ceramic tank body, the top port of the boride ceramic tank body is tightly covered with a boride ceramic end cover through a lock, and a vacuum extraction pump is placed on the left side of the boride ceramic tank body. Among them, a cylindrical chamber is opened inside the boride ceramic tank body, and a cavity is opened inside the boride ceramic end cover;

[0005] The vacuum extraction end of the vacuum extraction pump is connected with a main vacuum extraction pipe through a joint, and a secondary vacuum extraction pipe is fixedly penetrated through the side wall of the main vacuum extraction pipe. Among them, the end of the main vacuum extraction pipe penetrates into the interior of the cavity, and the end of the secondary vacuum extraction pipe penetrates into the interior of the cylindrical chamber;

[0006] Eight heating pipes located inside the cavity of the boride ceramic end cover are fixedly arranged on the bottom surface of the boride ceramic end cover in a circular array.

[0007] As a preferred scheme of the utility model, a sealing strip is adhesively fixed around the edge of the bottom surface of the boride ceramic end cover, and a sealing groove is adhesively fixed around the edge of the top port of the boride ceramic tank body. Among them, the sealing strip and the sealing groove are coupled and sealed with each other.

[0008] As a preferred embodiment of the present utility model, a through hole for the main vacuum extraction pipe to penetrate is provided on the left side wall of the boride ceramic end cap, and a through hole for the auxiliary vacuum extraction pipe to penetrate is provided on the left surface of the boride ceramic tank body; sealants for sealing the gaps between the main vacuum extraction pipe and the auxiliary vacuum extraction pipe and the through holes are provided in the through holes.

[0009] As a preferred embodiment of the present utility model, air pressure sensors are installed inside both the cavity and the cylindrical chamber.

[0010] As a preferred embodiment of the present utility model, a mica inner cylinder is fixedly connected to the inner cavity side wall of the boride ceramic tank body.

[0011] A synthesis chamber for a polycrystalline diamond compact includes a cylindrical chamber opened at the central position inside the boride ceramic tank body, and a chamber partition member placed inside the cylindrical chamber; wherein, the chamber partition member is composed of four vertical plates arranged in an annular array, and 5 - 7 material placement plates are fixedly arranged at equal distances between the vertical plates.

[0012] As a preferred embodiment of the present utility model, the four vertical plates in the chamber partition member equally divide the internal space of the cylindrical chamber into four equal parts, and the sides of the vertical plates away from each other are in contact with the inner cavity side wall of the mica inner cylinder, and there is a distance of 3 - 7 cm between the side surface of the material placement plate away from the chamber partition member and the inner cavity side wall of the mica inner cylinder.

[0013] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0014] The solution of the present utility model uses a boride ceramic tank as a mold, and a mica inner cylinder with a heat insulation function is arranged inside the tank body. It cooperates with the boride ceramic tank to achieve the first - layer heat preservation effect, and the inside of the tank body and the tank cover is set to be in a hollow state. The air inside the tank body and the tank cover is extracted by a vacuum pump, and a pseudo - vacuum state is used to achieve the second - layer heat preservation effect. At the same time, the synthesis chamber inside the tank body is divided into four parts by four vertical plates arranged in an annular array, achieving the effect of sintering multiple polycrystalline diamond compacts simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is an external schematic diagram of a sintering mold for a polycrystalline diamond compact;

[0017] Figure 2It is a schematic diagram of the polycrystalline diamond composite sheet sintering mold after being cut and decomposed;

[0018] Figure 3 is a cross-sectional schematic diagram of a sintering mold;

[0019] Figure 4 Schematic diagram of the chamber divider inside the mold.

[0020] Description of reference numerals:

[0021] 1. Boride ceramic tank body; 2. Boride ceramic end cover; 3. Vacuum extraction main pipe; 4. Vacuum extraction pump; 5. Mica inner tube; 6. Heating tube; 7. Chamber partition; 8. Cavity; 9. Cylindrical chamber; 10. Cylindrical chamber; 11. Vacuum extraction auxiliary pipe; 12. Material placement plate. DETAILED DESCRIPTION

[0022] In order to more clearly explain and illustrate the technical solution and implementation of the present utility model, several preferred specific embodiments for implementing the technical solution of the present utility model are introduced below.

[0023] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application and use. It should be understood that in all these figures, the same or similar figure numbers indicate the same or similar parts and features. The various figures only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may use exaggerated methods to illustrate the relevant details or structures of the embodiments of the present disclosure. The various publications, patents and published patent specifications cited herein are incorporated herein by reference in their entirety. The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model.

[0024] Example:

[0025] A better technical solution for the sintering mold of polycrystalline diamond composite sheet:

[0026] Refer to the instruction manual Figure 1 As shown; it includes a boride ceramic tank body 1, the top port of the boride ceramic tank body 1 is tightly covered with a boride ceramic end cover 2 through a lock, and a vacuum extraction pump 4 is placed on the left side of the boride ceramic tank body 1. A controller needs to be installed in conjunction with the vacuum extraction pump 4. After the air pressure sensors inside the cylindrical chamber 9 and the cavity 8 transmit the air pressure data to the computer, the start / stop action of the vacuum extraction pump 4 is controlled.

[0027] Among them, refer to the instructions attached Figure 3As shown; a cylindrical chamber 9 is provided inside the boride ceramic tank body 1, and a cavity 8 is provided inside the boride ceramic end cover 2; pressure sensors are installed inside both the cavity 8 and the cylindrical chamber 9.

[0028] Refer to the attached instruction manual Figure 3 As shown; the vacuum extraction end of the vacuum extraction pump 4 is connected to a main vacuum extraction pipe 3 through a connector. A secondary vacuum extraction pipe 11 is fixedly penetrated through the side wall of the main vacuum extraction pipe 3. Among them, the end of the main vacuum extraction pipe 3 penetrates into the interior of the cavity 8, and the end of the secondary vacuum extraction pipe 11 penetrates into the interior of the cylindrical chamber 9; manual or electric valves are installed on the pipes of the secondary vacuum extraction pipe 11 and the main vacuum extraction pipe 3. Since the volumes of the cylindrical chamber 9 and the cavity 8 are different, after the air in a certain chamber is extracted, the extraction action is closed by using the valve to keep the two chambers at the same air pressure.

[0029] Refer to the attached instruction manual Figure 2 As shown; eight heating pipes 6 are fixedly arranged in a circular array on the bottom surface of the boride ceramic end cover 2 and are located inside the cavity of the boride ceramic end cover 2. Every two heating pipes 6 are located in any one of the four spaces of the cylindrical chamber 10, and the heating pipes 6 are located outside the material placement plate 12.

[0030] Refer to the attached instruction manual Figure 3 As shown; a sealing strip is adhesively fixed around the edge of the bottom surface of the boride ceramic end cover 2, and a sealing groove is adhesively fixed around the edge of the top port of the boride ceramic tank body 1. Among them, the sealing strip and the sealing groove are coupled and sealed with each other.

[0031] Refer to the attached instruction manual Figure 3 As shown; a through hole for the main vacuum extraction pipe 3 to penetrate is provided on the left side wall of the boride ceramic end cover 2, and a through hole for the secondary vacuum extraction pipe 11 to penetrate is provided on the left surface of the boride ceramic tank body 1; sealant for sealing the gap between the main vacuum extraction pipe 3 and the secondary vacuum extraction pipe 11 and the through hole is provided in the through hole.

[0032] Refer to the attached instruction manual Figure 2 As shown; a mica inner cylinder 5 is fixedly connected to the inner cavity side wall of the boride ceramic tank body 1.

[0033] A preferred technical solution for the synthesis chamber of a polycrystalline diamond compact:

[0034] Refer to the attached instruction manual Figure 3 As shown; it includes a cylindrical chamber 10 provided at the central position inside the boride ceramic tank body 1, and a chamber partition 7 placed inside the cylindrical chamber 10; Refer to the attached instruction manual Figure 4 As shown; among them, the chamber partition 7 is composed of four vertical plates arranged in a circular array, and 5 - 7 material placement plates 12 are fixedly arranged at equal distances between the vertical plates;

[0035] Refer to the attached drawings of the specification Figure 4 as shown; the four vertical plates in the chamber partition 7 equally divide the internal space of the cylindrical chamber 10 into four equal parts, and the sides of the vertical plates away from each other are in contact with the inner side wall of the mica inner cylinder 5. There is a distance of 3-7 cm between the surface of the material placement plate 12 away from the chamber partition 7 and the inner side wall of the mica inner cylinder 5.

[0036] Only some exemplary embodiments of the present invention have been described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sintering mold for a polycrystalline diamond composite sheet, comprising a boride ceramic tank body (1), characterized in that: The top port of the boride ceramic tank body (1) is tightly covered with a boride ceramic end cover (2) by means of a lock, and a vacuum extraction pump (4) is placed on the left side of the boride ceramic tank body (1), wherein a cylindrical chamber (9) is provided inside the boride ceramic tank body (1), and a cavity (8) is provided inside the boride ceramic end cover (2); The vacuum extraction end of the vacuum extraction pump (4) is connected to a vacuum extraction main pipe (3) via a joint, and a vacuum extraction secondary pipe (11) is fixedly passed through the side wall of the vacuum extraction main pipe (3), wherein the end of the vacuum extraction main pipe (3) passes through the interior of the cavity (8), and the end of the vacuum extraction secondary pipe (11) passes through the interior of the cylindrical chamber (9); Eight heating tubes (6) located in the inner cavity of the boride ceramic end cover (2) are fixed in a ring array on the bottom surface of the boride ceramic end cover (2).

2. The sintering mold for a polycrystalline diamond compact according to claim 1, characterized in that: A circle of sealing strip is fixed to the bottom surface edge of the boride ceramic end cover (2) by adhesive, and a circle of sealing groove is fixed to the top port edge of the boride ceramic tank body (1) by adhesive, wherein the sealing strip and the sealing groove are coupled and sealed to each other.

3. The sintering mold for a polycrystalline diamond compact according to claim 1, characterized in that: A through hole is provided on the left side wall of the boride ceramic end cover (2) for the vacuum extraction main pipe (3) to pass through, and a through hole is provided on the left side surface of the boride ceramic tank body (1) for the vacuum extraction auxiliary pipe (11) to pass through; and sealants are provided in the through holes to seal the gaps between the vacuum extraction main pipe (3) and the vacuum extraction auxiliary pipe (11) and the through holes.

4. The sintering mold for a polycrystalline diamond compact according to claim 1, characterized in that: Air pressure sensors are installed inside the cavity (8) and the cylindrical chamber (9).

5. The sintering mold for a polycrystalline diamond compact according to claim 1, characterized in that: A mica inner cylinder (5) is fixedly connected to the inner cavity side wall of the boride ceramic tank body (1).

6. A synthesis chamber for a polycrystalline diamond compact, characterized in that: A sintering mold for a polycrystalline diamond composite sheet according to any one of claims 1 to 5, specifically comprising a cylindrical chamber (10) opened at the central position inside a boride ceramic tank body (1), and a chamber divider (7) placed inside the cylindrical chamber (10); wherein the chamber divider (7) is composed of four vertical plates arranged in a circular array, and 5 to 7 material placement plates (12) are fixed at equal distances between the vertical plates.

7. The synthesis chamber of a polycrystalline diamond compact according to claim 6, characterized in that: The four vertical plates in the chamber partition (7) divide the internal space of the cylindrical chamber (10) into four equal parts of equal volume, and the sides of the vertical plates away from each other are in contact with the inner cavity side wall of the mica inner tube (5), and there is a spacing of 3-7 cm between the side surface of the material placement plate (12) away from the chamber partition (7) and the inner cavity side wall of the mica inner tube (5).

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