An isostatic pressing forming process for extra-large specifications

Abstract

This application relates to an isostatic pressing forming process for extra-large specifications, belonging to the technical field of isostatic pressing graphite forming, and includes the following steps: powder injection step, injecting powder into a preset position in a rubber sleeve; leveling step, leveling the upper surface of the powder; pressing plate step, laying a filter cloth on the upper surface of the powder, and then placing a cover plate on the upper surface of the filter cloth. At this time, the side walls of the filter cloth and the cover plate are in contact and extend out of the upper surface of the rubber sleeve; forming step, sealing the high-pressure film and evacuating it, and then sending it into an isostatic pressing chamber for forming; material taking step, cutting the high-pressure film, and clamping the contact part of the filter cloth and the cover plate to transfer the cover plate and the filter cloth. This application has the advantage of relatively simple material taking after forming.

Description

Technical Field

[0001] This application relates to the technical field of isostatic graphite forming, and in particular to an ultra-large specification isostatic forming process. Background Art

[0002] During the production of ultra-large specification cylindrical isostatic graphite, a forming device is required. The forming device includes an outer mold and an inner mold. More specifically, the cylindrical outer mold and the inner mold are placed concentrically to form an annular space. Subsequently, a high-pressure film (made of PE material) and a rubber sleeve are sequentially placed into the annular space. After putting powder into the rubber sleeve, laying a filter cloth and a cover plate, and sealing and evacuating the high-pressure film, the outer mold and the high-pressure film are placed in an isostatic pressing chamber for forming. However, the material taking process after forming is rather cumbersome. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, one of the purposes of this application is to provide an ultra-large specification isostatic forming process, which has the advantage of being relatively simple in taking materials after forming.

[0004] The above object of this application is achieved through the following technical solutions:

[0005] An ultra-large specification isostatic forming process includes the following steps: powder injection step, injecting powder into a preset position in the rubber sleeve; leveling step, leveling the upper surface of the powder; pressing plate step, laying a filter cloth on the upper surface of the powder, and then placing a cover plate on the upper surface of the filter cloth. At this time, the side walls of the filter cloth and the cover plate are in contact and extend out of the upper surface of the rubber sleeve; forming step, sealing and evacuating the high-pressure film and then sending it into an isostatic pressing chamber for forming; material taking step, cutting the high-pressure film, clamping the contact part of the filter cloth and the cover plate, and transferring the cover plate and the filter cloth.

[0006] By adopting the above technical solution, in the material taking process, by clamping the cover plate and the filter cloth together, the material taking steps can be reduced, making the material taking more convenient.

[0007] In a preferred example of this application, it can be further configured as follows: in the material taking step, a material taking device is used. The material taking device includes a material taking disk and a driving component. The driving component includes a rotating part and a lifting part. The rotating part is used to drive the material taking disk to rotate, and the lifting part is used to drive the rotating part to lift. The material taking disk is provided with a flange, and the flange is used to wrap the side wall of the cover plate. The flange is provided with a cutter and a clamping part. The position of the cutter is higher than that of the clamping part. The cutter is used to cut the high-pressure film, and the clamping part is used to clamp the filter cloth and the cover plate.

[0008] By adopting the above technical solution, that is, during the material taking process, the high-pressure film is cut by the cutter to facilitate the separation of the high-pressure film from the cover plate. Subsequently, the filter cloth and the cover plate are clamped by the clamping part, so as to achieve the purpose of transferring the cover plate and the filter cloth.

[0009] In a preferred example, the present application can be further configured as follows: a cutting groove is provided on the side wall of the cover plate, and the cutting groove is arranged in a ring shape and concentric with the cover plate.

[0010] By adopting the above technical solution, the presence of the cutting groove makes the cutting effect better when cutting the high-pressure film.

[0011] In a preferred example, the present application can be further configured as follows: in the forming step, when evacuating the high-pressure film, the high-pressure film is made to fit against the groove wall of the cutting groove.

[0012] By adopting the above technical solution, therefore, during the forming process, the probability of damage to the high-pressure film can be reduced.

[0013] In a preferred example, the present application can be further configured as follows: in the material taking step, the high-pressure film is pressurized so that the high-pressure film is separated from the groove wall of the cutting groove. In the step of cutting the high-pressure film, the position of the cutting knife is confirmed, and when it is confirmed to be correct, the high-pressure film is cut.

[0014] By adopting the above technical solution, since the high-pressure film is separated from the groove wall of the cutting groove, the cutting edge of the cutting knife can cut the high-pressure film without contacting the groove wall of the cutting groove, thereby reducing the wear of the cutting knife.

[0015] In a preferred example, the present application can be further configured as follows: the clamping member includes a clamping rod and a telescopic member. The telescopic member is used to make the clamping rod telescopic. The head of the clamping rod is hemispherical, and the side wall of the clamping rod fits against the cutting groove.

[0016] By adopting the above technical solution, when the clamping rod extends into the cutting groove, it can abut against the filter cloth, thereby achieving a good fixing effect on the filter cloth.

[0017] In a preferred example, the present application can be further configured as follows: in the step of cutting the high-pressure film, the distance between the cut of the high-pressure film and the bottom of the cutting groove is less than the distance between the filter cloth and the bottom of the cutting groove.

[0018] By adopting the above technical solution, that is, after clamping, during the ascending process, the contact area between the high-pressure film and the filter cloth can be effectively reduced, and further, during the ascending process, the probability of the filter cloth falling off due to the friction between the high-pressure film and the filter cloth can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the forming device of the present application.

[0020] Figure 2 It is a schematic structural diagram of the material taking device of the present application.

[0021] Reference numerals: 1, outer mold; 2, high-pressure film; 3, rubber sleeve; 4, filter cloth; 5, cover plate; 51, cutting groove; 6, material taking plate; 61, edge wrapping; 62, cutter; 63, clamping rod. Detailed implementation mode

[0022] The following further elaborates on the present application with reference to the accompanying drawings.

[0023] Refer to Figure 1 and Figure 2 For a super-large specification isostatic pressing forming process disclosed in the present application, it includes the following steps: placing step, placing the inner mold and the outer mold 1 at a preset position, and placing the high-pressure film 2 and the rubber sleeve 3 at a preset position; powder injection step, injecting powder into a preset position inside the rubber sleeve 3; leveling step, leveling the upper surface of the powder; pressing plate step; laying the filter cloth 4 on the upper surface of the powder, and then placing the cover plate 5 on the upper surface of the filter cloth 4. At this time, the side walls of the filter cloth 4 and the cover plate 5 are in contact and extend out of the upper surface of the rubber sleeve 3; forming step, sealing the high-pressure film 2 and evacuating it, and then sending it into the isostatic pressing chamber for forming; material taking step, cutting the high-pressure film 2, and clamping the contact part of the filter cloth 4 and the cover plate 5 to transfer the cover plate 5 and the filter cloth 4.

[0024] In the material taking step, a material taking device is adopted. The material taking device includes a material taking plate 6 and a driving component. The driving component includes a rotating part and a lifting part. In this embodiment, the rotating part is a motor, and the rotating part is used to drive the material taking plate 6 to rotate. In this embodiment, the lifting part is a hydraulic cylinder, and the lifting part is used to drive the rotating part to lift. The material taking plate 6 is provided with an edge wrapping 61, and the edge wrapping 61 is used to wrap the side wall of the cover plate 5. The edge wrapping 61 is provided with a cutter 62 and a clamping part. The position of the cutter 62 is higher than that of the clamping part. The cutter 62 is used to cut the high-pressure film 2, and the clamping part is used to clamp the filter cloth 4 and the cover plate 5.

[0025] The cover plate 5 is annular and both the inner side wall and the side wall are provided with cutting grooves 51. The cutting grooves 51 are arranged in a ring and are concentric with the cover plate 5.

[0026] The edge wrapping 61 is also provided with a cylinder for driving the cutter 62 to extend and retract. In this embodiment, there may be multiple cutters 62, and the multiple cutters 62 can be independently controlled or grouped controlled. The clamping parts can be multiple groups. The clamping part includes a clamping rod 63 and a telescopic part. The telescopic part is used to make the clamping rod 63 extend and retract. The head of the clamping rod 63 is hemispherical and made of rubber material. The side wall of the clamping rod 63 is attached to the cutting groove 51. In this embodiment, the telescopic part can adopt a hydraulic cylinder. In other embodiments, the telescopic part can be rubber.

[0027] In the forming step, when evacuating the high-pressure film 2, the high-pressure film 2 is first preliminarily extruded so that the high-pressure film 2 fits against the rubber sleeve 3, the cover plate 5, and the groove wall of the cutting groove 51. Subsequently, the high-pressure film 2 is sealed with a vacuum extraction port left. Then, vacuum is extracted through the vacuum extraction port to remove the residual air. At this time, the filter cloth 4 covers at least half of the groove wall of the cutting groove 51.

[0028] In the material taking step, the high-pressure film 2 is pressurized to separate the high-pressure film 2 from the groove wall of the cutting groove 51, and then pressure is maintained. In the step of cutting the high-pressure film 2, the position of the cutting knife 62 is confirmed. When it is confirmed to be correct, the high-pressure film 2 is cut. The distance between the cut of the high-pressure film 2 and the bottom of the cutting groove 51 is less than the distance between the filter cloth 4 and the bottom of the cutting groove 51. During the process of confirming the position of the cutting knife 62, the extended distance of the cutting knife 62 is compared with the groove depth of the cutting groove 51, that is, the tip of the cutting knife 62 does not contact the groove wall of the cutting groove 51 (for example, to ensure good cutting effect, the tip of the cutting knife 62 may be about to contact the groove wall of the cutting groove 51, such as with a spacing of 1 mm. In different embodiments, this spacing can be adjusted), and the position meets the standard. Due to the presence of the rubber sleeve 3 and the cutting groove 51, after the cutting knife 62 extends into the cutting groove 51, it can achieve a good cutting effect on the high-pressure film 2.

[0029] The implementation principle of this embodiment is: during use, by cutting the high-pressure film 2, and then clamping and transferring the filter cloth 4 and the cover plate 5 through the clamping member, and during the transfer process, the cut high-pressure film 2 is also transferred, thus simplifying the material taking step.

[0030] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An isostatic pressing forming process for extra-large specifications, characterized in that: It includes the following steps: powder injection step, injecting powder into a preset position inside the rubber sleeve (3); leveling step, leveling the upper surface of the powder; pressing plate step; laying the filter cloth (4) on the upper surface of the powder, and then placing the cover plate (5) on the upper surface of the filter cloth (4). At this time, the side walls of the filter cloth (4) and the cover plate (5) are in contact and extend out of the upper surface of the rubber sleeve (3); forming step, sealing the high-pressure film (2) and evacuating it, and then sending it into an isostatic pressing chamber for forming; material taking step, cutting the high-pressure film (2), and clamping the contact part of the filter cloth (4) and the cover plate (5) to transfer the cover plate (5) and the filter cloth (4). In the material taking step, a material taking device is used. The material taking device includes a material taking plate (6) and a driving assembly. The driving assembly includes a rotating part and a lifting part. The rotating part is used to drive the material taking plate (6) to rotate, and the lifting part is used to drive the rotating part to lift. The material taking plate (6) is provided with a side edge (61), and the side edge (61) is used to wrap the side wall of the cover plate (5). The side edge (61) is provided with a cutter (62) and a clamping part. The position of the cutter (62) is higher than the position of the clamping part. The cutter (62) is used to cut the high-pressure film (2), and the clamping part is used to clamp the filter cloth (4) and the cover plate (5).

2. The isostatic pressing forming process of an extra-large specification according to claim 1, wherein: The side wall of the cover plate (5) is provided with a cutting groove (51). The cutting groove (51) is annularly arranged and concentric with the cover plate (5).

3. The isostatic pressing forming process of an extra-large specification according to claim 2, characterized in that: In the forming step, when evacuating the high-pressure film (2), the high-pressure film (2) is made to fit against the groove wall of the cutting groove (51).

4. The isostatic pressing forming process of an extra-large specification according to claim 3, characterized in that: In the material taking step, the high-pressure film (2) is pressurized so that the high-pressure film (2) is separated from the groove wall of the cutting groove (51). In the step of cutting the high-pressure film (2), the position of the cutter (62) is confirmed. After confirmation, the high-pressure film (2) is cut.

5. A super-large specification isostatic pressing forming process according to claim 4, characterized in that: The clamping part includes a clamping rod (63) and a telescopic part. The telescopic part is used to make the clamping rod (63) telescopic. The head of the clamping rod (63) is hemispherical, and the side wall of the clamping rod (63) fits against the cutting groove (51).

6. The isostatic pressing forming process of an extra-large specification according to claim 4, characterized in that: In the step of cutting the high-pressure film (2), the distance between the cut of the high-pressure film (2) and the bottom of the cutting groove (51) is less than the distance between the filter cloth (4) and the bottom of the cutting groove (51).

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