Isostatic pressing device, dry bag isostatic press and isostatic pressing method

Abstract

The present application discloses an isostatic pressing device, a dry-bag isostatic press, and an isostatic pressing method. The isostatic pressing device includes a high-pressure cavity, which has a high-pressure treatment chamber. A dry-bag unit and an auxiliary forming member are provided in the high-pressure treatment chamber. The high-pressure cavity has a first end and a second end along a first direction. The first end of the dry-bag unit is installed at the first end of the high-pressure cavity. The dry-bag unit is used for loading the powder to be formed. The auxiliary forming member is used to abut against the second end of the dry-bag unit. When isostatic pressing is applied to the powder to be formed, the auxiliary forming member extrudes the dry-bag unit along the first direction, so that the powder to be formed takes a predetermined shape after isostatic pressing, reducing the randomness of the shape of the pressed product; thus solving the technical problem of the randomness of the shape of the pressed product caused by the thin and soft dry-bag or die unit.

Description

Technical Field

[0001] The present invention relates to the technical field of isostatic pressing forming, and particularly relates to an isostatic pressing device, a dry bag type isostatic press and an isostatic pressing method. Background Art

[0002] At present, isostatic presses are widely used in magnetic materials, ceramics, cemented carbides, high-temperature refractory materials, rare earth permanent magnet materials, etc. Isostatic presses use media such as oil, water or gas to apply the same pressure in all directions to the surface of an object, which can make the formed workpiece have a high and uniform density, uniform sintering shrinkage and be easy to process; according to different forming methods, isostatic presses can be divided into the wet bag method and the dry bag method. Among them, in the dry bag method, the powder to be formed is loaded into a dry bag, and the dry bag is sealed with the high-pressure chamber, and then the medium between the dry bag and the high-pressure chamber is pressurized to form the powder in the dry bag. Among them, the powder can be directly loaded into the dry bag, or the powder is first loaded into a rubber mold, and the rubber mold is placed in the dry bag.

[0003] However, it is found that in the above solutions, in a dry bag type isostatic press for pressing sheet or block products, the thickness and hardness of the dry bag or rubber mold affect the pressed product. For example, when the dry bag or rubber mold is thick and hard, although the shape of the pressed product is relatively regular, in the unloading stage, there is a risk that the pressed product is broken by the friction force between the dry bag or rubber mold and the powder mold. In order to reduce the influence of the above friction force, when the dry bag or rubber mold is thin and soft, in the pressurizing stage, the shape of the thin and soft dry bag or rubber mold will be random under the action of the pressure, and then the shape of the powder mold will be random. That is to say, in the existing dry bag type isostatic presses, how to use a thinner and softer dry bag or mold and make the shape of the pressed product regular has become an urgent problem to be solved. Summary of the Invention

[0004] The embodiment of the present application provides an isostatic pressing device, a dry bag type isostatic press and an isostatic pressing method. Among them, the isostatic pressing device includes a high-pressure cavity, the high-pressure cavity has a high-pressure treatment chamber, and a dry bag unit and an auxiliary forming member are arranged in the high-pressure treatment chamber. Among them, the high-pressure cavity has a first end and a second end along a first direction, the first end of the dry bag unit is installed at the first end of the high-pressure cavity, the dry bag unit is used for loading the powder to be formed, and the isostatic pressing medium is loaded between the dry bag unit and the high-pressure cavity. Then, the auxiliary forming member is used to abut against the second end of the dry bag unit, and when the isostatic pressing medium isostatic presses the powder to be formed, the auxiliary forming member presses the second end of the dry bag unit along the first direction, so that the powder to be formed is isostatic pressed into a predetermined shape;

[0005] That is to say, during the isostatic pressing process and before the powder to be formed loses its fluidity, the auxiliary forming member in the embodiment of the present application adjusts the powder to be formed into the shape of the target compact by extruding the dry bag unit, reducing the randomness of the shape of the pressed product; thereby solving the technical problem of the randomness of the shape of the pressed product caused by the thin and soft dry bag or rubber mold, achieving the technical effect of reducing the randomness of the shape of the pressed product, enabling flexible adjustment of the shape of the powder to be formed during pressing and making the pressed product not easily break.

[0006] The embodiment of the present application provides an isostatic pressing device, which is applied to an isostatic press. The isostatic pressing device includes:

[0007] A high-pressure cavity having a first end and a second end along a first direction, and a high-pressure treatment chamber is formed inside the high-pressure cavity;

[0008] A dry bag unit placed in the high-pressure treatment chamber, and along the first direction, the first end of the dry bag unit is installed at the first end of the high-pressure cavity;

[0009] An auxiliary forming unit including an auxiliary forming member disposed in the high-pressure treatment chamber;

[0010] Wherein, the dry bag unit is used to load the powder to be formed, and an isostatic pressing medium is loaded between the dry bag unit and the high-pressure cavity. And the auxiliary forming member is used to abut against the second end of the dry bag unit, so that when the isostatic pressing medium presses the powder to be formed isostatically, the auxiliary forming member extrudes the second end of the dry bag unit along the first direction.

[0011] In the embodiment of the present disclosure, the auxiliary forming unit includes a power unit that drives the auxiliary forming member to expand and contract along the first direction, so that the auxiliary forming member extrudes the dry bag unit along the first direction; wherein, the power unit is disposed in the high-pressure treatment chamber, or the power unit is disposed outside the high-pressure cavity.

[0012] In the embodiment of the present disclosure, the auxiliary forming unit includes an elastic member, one end of the elastic member is installed in the high-pressure treatment chamber, and the other end of the elastic member is connected to the auxiliary forming member, so that the auxiliary forming member extrudes the dry bag unit along the first direction.

[0013] In the embodiment of the present disclosure, a first opening is provided at the first end of the high-pressure cavity; corresponding to the first opening, a second opening is provided at the first end of the dry bag unit, and the end of the second opening is embedded in the end of the first opening, so that the first end of the dry bag unit is installed at the first end of the high-pressure cavity.

[0014] In an embodiment of the present disclosure, the high-pressure cavity includes a sealing plate unit for closing the first opening; the powder to be formed is loaded into the dry bag unit from the first opening and the second opening.

[0015] In an embodiment of the present disclosure, the isostatic pressing device further includes:

[0016] A mold unit, which is sleeved inside the dry bag unit and is used for loading the powder to be formed.

[0017] In an embodiment of the present disclosure, a medium flow structure is provided on the auxiliary forming part so that when the auxiliary forming part abuts against the second end of the dry bag unit, the isostatic pressing medium contacts the second end of the dry bag unit.

[0018] In an embodiment of the present disclosure, the medium flow structure is a permeable through-hole; and / or,

[0019] The medium flow structure is a concave-convex structure provided on the side of the auxiliary forming part facing the dry bag unit.

[0020] The present application also discloses a dry bag type isostatic press, which includes a pressurizing device, and the pressurizing device is the above-mentioned isostatic pressing device.

[0021] The present application also discloses an isostatic pressing method, which is applied to the isostatic pressing device as described above. Among them, the isostatic pressing method includes:

[0022] When performing isostatic pressing on the powder to be formed, control the auxiliary forming part to abut against the second end of the dry bag unit and extrude the dry bag unit along the first direction.

[0023] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0024] In the embodiment of the present application, the isostatic pressing device includes a high-pressure cavity, which has a high-pressure treatment chamber. A dry bag unit and an auxiliary forming member are arranged in the high-pressure treatment chamber. Among them, the high-pressure cavity has a first end and a second end along a first direction. The first end of the dry bag unit is installed at the first end of the high-pressure cavity. The dry bag unit is used to load the powder to be formed, and an isostatic medium is loaded between the dry bag unit and the high-pressure cavity. Then, the auxiliary forming member is used to abut against the second end of the dry bag unit. Moreover, when the isostatic medium isostatically presses the powder to be formed, the auxiliary forming member presses the dry bag unit along the first direction, so that the powder to be formed is isostatically pressed into a predetermined shape after isostatic pressing; that is to say, during the isostatic pressing process and before the powder to be formed loses fluidity, the auxiliary forming member in the embodiment of the present application adjusts the powder to be formed into the shape of the target mold by pressing the dry bag unit, reducing the randomness of the shape of the pressed product; thus solving the technical problem of the randomness of the shape of the pressed product caused when the dry bag or the rubber mold is thin and soft, achieving the technical effect of reducing the randomness of the shape of the pressed product, being able to flexibly adjust the shape of the powder to be formed during pressing and making the pressed product not easily break. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a structure where the pressed product breaks during the unloading stage when the dry bag unit or the mold unit is thick in the prior art.

[0026] Figure 2 It is another schematic structural diagram of a structure where the pressed product breaks during the unloading stage when the dry bag unit or the mold unit is thick in the prior art.

[0027] Figure 3 It is a schematic structural diagram of a structure where the shape of the pressed product is random after being isostatically pressed when the dry bag unit or the mold unit is thin in the prior art.

[0028] Figure 4 It is a schematic structural diagram of the isostatic pressing device described in the embodiment of the present application.

[0029] Figure 5 It is a schematic structural diagram of the auxiliary forming member pressing the dry bag unit described in the embodiment of the present application.

[0030] Figure 6 It is another schematic structural diagram of the auxiliary forming unit described in the embodiment of the present application.

[0031] Figure 7 It is a schematic structural diagram of the first opening facing upward described in the embodiment of the present application.

[0032] Figure 8 It is a schematic structural diagram of the concavo-convex structure described in the embodiment of the present application.

[0033] Figure 9 It is a schematic flow chart of the isostatic pressing method described in the embodiments of the present application.

[0034] Reference numerals

[0035] 10 - High-pressure cavity, 11 - High-pressure treatment chamber, 12 - First opening, 13 - Sealing plate unit

[0036] 20 - Dry bag unit, 21 - Second opening, 22 - Mounting flange

[0037] 30 - Mold unit

[0038] 40 - Auxiliary forming unit, 41 - Auxiliary forming part, 42 - Power unit, 43 - Elastic member, 44 - Concave-convex structure

[0039] 50 - Powder to be formed

[0040] A - First direction. Detailed implementation manners

[0041] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0042] Overview

[0043] A dry bag type isostatic press generally includes a high-pressure cavity 10. A dry bag unit 20 is provided in the high-pressure treatment chamber of the high-pressure cavity 10. An isostatic pressure medium is installed between the dry bag unit and the high-pressure cavity. The isostatic pressure medium can be a liquid medium or a gas medium. Then, the powder to be formed is directly loaded into the dry bag unit 20, or the powder to be formed is first loaded into the mold unit, and then the mold unit is loaded into the dry bag unit; then, the isostatic pressure medium in the high-pressure cavity is pressurized to further form the powder to be formed in the dry bag or the mold unit, thus completing the isostatic pressing.

[0044] However, it is found in actual applications that the dry bag unit or the mold unit affects the pressing success rate of the pressed product; for example, when the dry bag unit or the mold unit is thick and hard, during the unloading stage, see Figure 1 、 2 , there is a risk that the pressed product is broken by the friction force between the dry bag unit or the mold unit and the powder compact; or, in order to reduce the influence of the above friction force, when the dry bag unit or the mold unit is thin and soft, during the pressurized pressing stage, the shape of the thin and soft dry bag unit or mold unit will be random under the action of the isostatic pressure medium, for example, see Figure 3 , and then the shape of the powder compact becomes random.

[0045] In view of the above problems, an embodiment of the present application discloses an isostatic pressing device, which is applied to an isostatic press. The isostatic pressing device includes a high-pressure cavity 10, a dry bag unit 20, and an auxiliary forming unit 40. Among them, the high-pressure cavity 10 has a first end and a second end along a first direction, and a high-pressure treatment chamber 11 is formed inside the high-pressure cavity 10. The dry bag unit 20 is placed in the high-pressure treatment chamber 11, and along the first direction, the first end of the dry bag unit 20 is installed at the first end of the high-pressure cavity 10. The auxiliary forming unit 40 includes an auxiliary forming member 41 disposed in the high-pressure treatment chamber 11. Among them, the dry bag unit 20 is used to load the powder 50 to be formed, an isostatic pressing medium is loaded between the dry bag unit 20 and the high-pressure cavity 10, and the auxiliary forming member 41 is used to abut against the second end of the dry bag unit 20, so that when the isostatic pressing medium isostatically presses the powder 50 to be formed, the auxiliary forming member 41 presses the second end of the dry bag unit 20 along the first direction.

[0046] Specifically, referring to Figure 4 , an isostatic pressing medium is provided inside the high-pressure treatment chamber of the high-pressure cavity. The isostatic pressing medium can be a liquid medium or a gas medium. Then, the dry bag unit is placed in the high-pressure treatment chamber, and the first end of the dry bag unit is installed at the first end of the high-pressure cavity. Then, along the first direction ( Figure 4 direction A in

[0047] ), an auxiliary forming member is provided at the second end of the dry bag unit, and the auxiliary forming member is used to abut against the second end of the dry bag unit. In this way, when the high-pressure cavity isostatically presses the powder to be formed in the dry bag through the isostatic pressing medium, the auxiliary forming member presses the second end of the dry bag unit along the first direction.

[0048] In this embodiment, the time when the auxiliary forming member acts on the dry bag unit is superimposed on the isostatic pressing process; that is, during the isostatic pressing process and before the powder to be formed loses its fluidity due to isostatic pressing, the auxiliary forming member acts on the dry bag unit, and the second end of the dry bag unit is squeezed so as to assist the powder to be formed in the dry bag to take a predetermined shape; then, as the isostatic pressing process proceeds, while the powder to be formed maintains the predetermined shape, the powder to be formed gradually loses its fluidity due to isostatic pressing, and finally the powder to be formed is isostatically pressed and formed while maintaining the predetermined shape; it can be understood that the auxiliary forming member can act on the dry bag unit before the start of isostatic pressing, or the auxiliary forming member can act on the dry bag unit slightly later than isostatic pressing, or the auxiliary forming member can act on the dry bag unit simultaneously with the isostatic pressing process.

[0049] In addition, it can be understood that in this embodiment, the dry bag unit 20 loads the powder 50 to be formed, and the powder 50 to be formed can be directly loaded into the dry bag unit 20, or, referring to Figure 4 , the powder 50 to be formed can be first loaded into the mold unit 30, and then the mold unit 30 is sleeved inside the dry bag unit 20.

[0050] In addition, it can be understood that in this embodiment, the auxiliary forming member is, for example, flat, or, according to actual needs, the auxiliary forming member is a curved panel with a certain curvature, or, according to actual needs, the auxiliary forming member can also be other set shapes.

[0051] For easy understanding, in this embodiment, the space between the dry bag unit and the high-pressure cavity is used to load the isostatic pressing medium, that is, before the start of isostatic pressing, it is necessary to inject the isostatic pressing medium between the dry bag unit and the high-pressure cavity, and then, during the period when isostatic pressing is not required, the isostatic pressing medium can be pumped out;

[0052] The dry bag unit is used to load the powder to be formed, wherein, as described above, the powder to be formed can be directly loaded into the dry bag unit, or the powder to be formed is first loaded into the mold unit, and then the mold unit is loaded into the dry bag unit;

[0053] The auxiliary forming member is used to abut against the second end of the dry bag unit, that is, for example, before isostatic pressing, the auxiliary forming member does not contact the second end of the dry bag unit, and then, during the isostatic pressing process, the auxiliary forming member leans towards and abuts against the second end of the dry bag unit along the above-mentioned first direction, thereby squeezing the dry bag unit.

[0054] In the embodiment of the present application, the isostatic pressing device includes a high-pressure cavity, which has a high-pressure treatment chamber. A dry bag unit and an auxiliary forming member are arranged in the high-pressure treatment chamber. Among them, the high-pressure cavity has a first end and a second end along a first direction. The first end of the dry bag unit is installed at the first end of the high-pressure cavity. The dry bag unit is used to load the powder to be formed. An isostatic pressing medium is loaded between the dry bag unit and the high-pressure cavity. Then, the auxiliary forming member is used to abut against the second end of the dry bag unit. And when the isostatic pressing medium isostatically presses the powder to be formed, the auxiliary forming member extrudes the dry bag unit along the first direction, so that the powder to be formed takes a predetermined shape after isostatic pressing; that is to say, during the isostatic pressing process and before the powder to be formed loses fluidity, the auxiliary forming member in the embodiment of the present application adjusts the powder to be formed into the shape of the target pressing mold by extruding the dry bag unit, reducing the randomness of the shape of the pressed product; thus solving the technical problem of the randomness of the shape of the pressed product caused when the dry bag or the rubber mold is thin and soft, achieving the technical effect of reducing the randomness of the shape of the pressed product, being able to flexibly adjust the shape of the powder to be formed during pressing and making the pressed product not easily break.

[0055] In a possible implementation manner, the auxiliary forming unit 40 includes a power unit 42. The power unit 42 drives the auxiliary forming member 41 to expand and contract along the first direction, so that the auxiliary forming member 41 extrudes the dry bag unit 20 along the first direction; among them, the power unit 42 is arranged in the high-pressure treatment chamber 11, or the power unit 42 is arranged outside the high-pressure cavity 10.

[0056] In this embodiment, the auxiliary forming unit is an active control unit. Specifically, referring to Figure 4 、 5 , the auxiliary forming unit includes a power unit. The power unit can be, for example, a cylinder, a hydraulic cylinder or a power motor, etc. Then the power unit is connected to the auxiliary forming member and drives the auxiliary forming member to expand and contract and move along the first direction. In this way, by actively controlling the auxiliary forming member, the auxiliary forming member can be used to abut against the second end of the dry bag unit.

[0057] Among them, the power unit can be arranged inside the high-pressure treatment chamber, as shown in Figure 4 , or, understandably, the power unit can also be arranged outside the high-pressure cavity.

[0058] Among them, the expansion and contraction of the power unit driving the auxiliary forming member can be controlled according to a predetermined stroke. The predetermined stroke can be, for example, a function related to either or both of time and the internal pressure of the high-pressure treatment chamber.

[0059] In a possible implementation manner, the auxiliary forming unit 40 includes an elastic member 43. One end of the elastic member 43 is installed in the high-pressure treatment chamber 11, and the other end of the elastic member 43 is connected to the auxiliary forming member 41, so that the auxiliary forming member 41 extrudes the dry bag unit 20 along the first direction.

[0060] In this embodiment, the auxiliary forming unit is a passive control unit. Specifically, referring to Figure 6 , the auxiliary forming unit includes an elastic member, such as a spring, etc. Then, one end of the spring is arranged on the inner wall of the high-pressure treatment chamber, and the other end of the spring is connected to the auxiliary forming member. And when the dry bag unit is filled with the powder to be formed, the auxiliary forming member abuts against the second end of the dry bag unit, and the elastic member is in a compressed state. In this way, through the elastic force of the elastic member, the auxiliary forming member can be used to abut against the second end of the dry bag unit, and then an extrusion force is applied to the dry bag unit.

[0061] It can be understood that the elastic member can also be connected with a locking mechanism, and the elastic force of the elastic member acting on the auxiliary forming member is controlled by the opening and closing of the locking mechanism.

[0062] In a possible implementation manner, a first opening 12 is provided at the first end of the high-pressure cavity 10; corresponding to the first opening 12, a second opening 21 is provided at the first end of the dry bag unit 20, and the end of the second opening 21 is embedded in the end of the first opening 12, so that the first end of the dry bag unit 20 is installed at the first end of the high-pressure cavity 10.

[0063] Referring to Figure 5 , for example, a first opening 12 can be provided at the first end of the high-pressure cavity. Then, the second opening 21 at the first end of the dry bag unit 20 is embedded in the end of the first opening 12, and the isostatic pressing medium is located between the dry bag unit 20 and the high-pressure cavity 10; in this way, it can be understood that the powder to be formed or the mold unit loaded with the powder to be formed can be placed inside the dry bag unit through the first opening, which is convenient for operation.

[0064] In this embodiment, the end of the second opening is embedded in the end of the first opening, and a sealing arrangement should be made between the second opening and the first opening to prevent the leakage of the isostatic pressing medium between the dry bag unit and the high-pressure cavity.

[0065] In a possible implementation manner, the high-pressure cavity 10 includes a sealing plate unit 13, and the sealing plate unit 13 is used to close the first opening 12; the end of the second opening 21 is turned outwards with a mounting flange 22 or a sealing lip, and the mounting flange 22 or the sealing lip is used to be embedded in the first opening 12; the powder 50 to be formed is loaded into the dry bag unit 20 from the first opening 12 and the second opening 21.

[0066] In this embodiment, referring to Figure 4The first opening is closed by a sealing plate unit, so that the high-pressure processing chamber is in a sealed state. In this way, when the high-pressure cavity is pressurized, the powder to be formed inside the dry bag unit is isostatically pressurized through the isotropic conduction of the internal isostatic medium.

[0067] In this embodiment, the powder to be molded or the mold unit loaded with the powder to be molded is loaded into the dry bag unit from the first opening and the second opening; in addition, it can be understood that Figure 4 , 5 As shown, the first opening can be arranged downward, so that the powder to be formed is loaded into the dry bag unit from the bottom end of the high pressure chamber, or, as shown Figure 7 As shown, the first opening can be arranged upward, so that the powder to be formed is loaded into the dry bag unit from the top of the high-pressure cavity; alternatively, the first opening can also be arranged to the left or right, that is, the first end to the second end of the high-pressure cavity is arranged in a horizontal direction, and the powder to be formed is loaded into the dry bag unit from the left or right side of the high-pressure cavity.

[0068] In a possible implementation manner, a medium flow structure is provided on the auxiliary molding 41 , so that when the auxiliary molding 41 abuts against the second end of the dry bag unit 20 , the isostatic medium contacts the second end of the dry bag unit 20 .

[0069] In this embodiment, since the auxiliary molding part abuts against the second end of the dry bag unit, at this time, in order to ensure sufficient contact between the isostatic medium and various parts of the dry bag unit and to isotropically isostatically pressurize the dry bag unit, a medium flow structure is provided on the auxiliary molding part. For ease of understanding, when the auxiliary molding part abuts against the second end of the dry bag unit, the medium flow structure can enable the isostatic medium to contact the second end of the dry bag unit.

[0070] In a possible implementation manner, the medium circulation structure is a permeable through hole; and / or, the medium circulation structure is a concave-convex structure 44 , and the concave-convex structure 44 is disposed on a side of the auxiliary molding 41 facing the dry bag unit 20 .

[0071] Specifically, in one possible embodiment, the auxiliary molded part is provided with a permeable through hole, and the permeable through hole can penetrate the auxiliary molded part along the first direction, so that the isostatic medium can contact the second end of the dry bag unit; or, in another possible embodiment, it can be understood that, see Figure 8 The auxiliary molded part 41 is provided with a concavo-convex structure 44 on one side facing the dry bag unit 20 , and the concavo-convex structure 44 enables the isostatic pressure medium to contact the second end of the dry bag unit 20 .

[0072] An embodiment of the present application also provides a dry bag isostatic press, which includes a pressurizing device, and the pressurizing device is the above-mentioned isostatic pressurizing device.

[0073] An embodiment of the present application also provides an isostatic pressing method, which is applied to the isostatic pressing device as described above. Among them, referring to Figure 9 , the isostatic pressing method includes:

[0074] When performing isostatic pressing on the powder to be formed, control the auxiliary forming member to abut against the second end of the dry bag unit and extrude the dry bag unit along the first direction.

[0075] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present application. In addition, the above-disclosed specific details are only for the purposes of illustration and easy understanding, rather than limitations. The above details do not limit the present application to necessarily adopt the above specific details to implement.

[0076] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open-ended words, meaning "including but not limited to", and can be used interchangeably with each other. The words "or" and "and" used herein refer to the word "and / or" and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to" and can be used interchangeably with each other.

[0077] It should also be noted that in the devices, equipment, and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application.

[0078] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0079] The above description has been given for purposes of illustration and description. In addition, this description does not intend to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize that certain variations, modifications, changes, additions, and sub-combinations thereof should be included within the scope of protection of the present invention.

Claims

1. An isostatic pressing device, characterized in that, The isostatic pressing device is applied to an isostatic press, and the isostatic pressing device includes: A high-pressure cavity (10), the high-pressure cavity (10) having a first end and a second end in a first direction, a high-pressure treatment chamber (11) formed inside the high-pressure cavity (10), and a first opening (12) provided at the first end of the high-pressure cavity (10). The high-pressure cavity (10) includes a sealing plate unit (13) for closing the first opening (12); A dry bag unit (20), the dry bag unit (20) being placed in the high-pressure treatment chamber (11), an isostatic pressure medium being loaded between the dry bag unit (20) and the high-pressure cavity (10), and the first end of the dry bag unit (20) in the first direction being installed at the first end of the high-pressure cavity (10); An auxiliary forming unit (40), the auxiliary forming unit (40) including an auxiliary forming member (41) provided in the high-pressure treatment chamber (11), the auxiliary forming member (41) being flat or a curved plate with a certain curvature; Wherein: the dry bag unit (20) is used for loading the powder to be formed (50), the auxiliary forming member (41) abuts against the second end of the dry bag unit (20) in the first direction, and when the isostatic pressure medium isostatically presses the powder to be formed (50), the auxiliary forming member (41) squeezes the second end of the dry bag unit (20) in the first direction before the powder to be formed (50) loses fluidity.

2. The isostatic pressing device according to claim 1, characterized in that The auxiliary forming unit (40) includes a power unit (42), the power unit (42) driving the auxiliary forming member (41) to expand and contract in the first direction so that the auxiliary forming member (41) squeezes the dry bag unit (20) in the first direction; wherein, the power unit (42) is provided inside the high-pressure treatment chamber (11), or the power unit (42) is provided outside the high-pressure cavity (10).

3. The isostatic pressing device according to claim 1, characterized in that, The auxiliary forming unit (40) includes an elastic member (43), one end of the elastic member (43) being installed in the high-pressure treatment chamber (11), and the other end of the elastic member (43) being connected to the auxiliary forming member (41) so that the auxiliary forming member (41) squeezes the dry bag unit (20) in the first direction.

4. The isostatic pressing device according to claim 1, characterized in that, The first end of the dry bag unit (20) is provided with a second opening (21) corresponding to the first opening (12), and the end of the second opening (21) is embedded in the end of the first opening (12) so that the first end of the dry bag unit (20) is installed at the first end of the high-pressure cavity (10).

5. The isostatic pressing device according to claim 4, characterized in that, The powder to be formed (50) is loaded into the dry bag unit (20) through the first opening (12) and the second opening (21).

6. The isostatic pressing device according to claim 1, characterized in that, The isostatic pressing device further includes: A mold unit (30), the mold unit (30) being sleeved inside the dry bag unit (20), the mold unit (30) being used for loading the powder to be formed (50).

7. The isostatic pressing device according to any one of claims 1 to 6, characterized in that, The auxiliary forming member (41) is provided with a medium circulation structure, so that when the auxiliary forming member (41) abuts against the second end of the dry bag unit (20), the isostatic pressing medium contacts the second end of the dry bag unit (20).

8. The isostatic pressing device according to claim 7, characterized in that, The medium circulation structure is a permeable through-hole; and / or, The medium circulation structure is a concave-convex structure (44), and the concave-convex structure (44) is arranged on the side of the auxiliary forming member (41) facing the dry bag unit (20).

9. A dry bag isostatic press, characterized in that, The dry bag type isostatic press includes a pressurizing device, and the pressurizing device is the isostatic pressing device according to any one of claims 1 to 8.

10. An isostatic pressing method, characterized in that, The isostatic pressing method is applied to the isostatic pressing device according to any one of claims 1 to 8, wherein the isostatic pressing method includes: When performing isostatic pressing on the powder to be formed, controlling the auxiliary forming member to abut against the second end of the dry bag unit and extruding the dry bag unit along the first direction.

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