Ultra-large-specification isostatic pressing forming process

Abstract

The invention relates to an ultra-large-specification isostatic pressing forming process, and relates to the technical field of isostatic pressing graphite forming, and the ultra-large-specification isostatic pressing forming process comprises the following steps: a powder injection step: injecting powder into a preset position in a rubber sleeve; a leveling step of leveling the upper surface of the powder; a plate pressing step; the filter cloth is laid on the upper surface of the powder, then the cover plate is placed on the upper surface of the filter cloth, and at the moment, the filter cloth makes contact with the side wall of the cover plate and extends out of the upper surface of the rubber sleeve, forming is conducted, the high-pressure membrane is fed into an isostatic pressing chamber to be formed after being sealed and emptied, material taking is conducted, the high-pressure membrane is cut, and the contact position of the filter cloth and the cover plate is clamped. And the cover plate and the filter cloth are transferred. The forming device has the advantage that materials are easy and convenient to take after forming.

Description

Technical Field

[0001] The present application relates to the technical field of isostatic graphite forming, and in particular to an isostatic forming process for super-large specifications. Background Art

[0002] In the production process of super-large cylindrical isostatic graphite, a molding device is required. The molding 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, and then the high-pressure membrane (PE material) and the rubber sleeve are placed in the annular space in sequence. After the powder is placed in the rubber sleeve, the filter cloth and the cover plate are laid, and the high-pressure membrane is vacuum-sealed, the outer mold and the high-pressure membrane are placed in the isostatic chamber for molding. However, the material collection process after molding is relatively cumbersome. Summary of the invention

[0003] In view of the shortcomings of the prior art, one of the purposes of the present application is to provide an isostatic pressing process for ultra-large specifications, which has the advantage of being easier to remove materials after forming.

[0004] The above-mentioned purpose of the present application is achieved through the following technical solutions:

[0005] An isostatic pressing process for ultra-large specifications comprises the following steps: a powder injection step, in which powder is injected into a preset position in a rubber sleeve; a leveling step, in which the upper surface of the powder is leveled; a plate pressing step, in which a filter cloth is laid on the upper surface of the powder, and then a cover plate is placed on the upper surface of the filter cloth, at which 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; a forming step, in which a high-pressure film is sealed and evacuated, and then sent into an isostatic pressing chamber for forming; and a material taking step, in which the high-pressure film is cut, and the contact between the filter cloth and the cover plate is clamped to transfer the cover plate and the filter cloth.

[0006] By adopting the above technical solution, during material taking, the cover plate and the filter cloth are clamped together, thereby reducing the number of material taking steps, thereby making material taking easier.

[0007] In a preferred example, the present application can be further configured as follows: in the material picking step, a material picking device is used, the material picking device includes a material picking tray and a driving assembly, the driving assembly includes a rotating part and a lifting part, the rotating part is used to drive the material picking tray to rotate, the lifting part is used to drive the rotating part to lift and lower, the material picking tray is provided with an edge wrapping, the edge wrapping is used to wrap the side wall of the covering plate, the edge wrapping is provided with a cutter and a clamping part, the position of the cutter is higher than the position of the clamping part, the cutter is used to cut the high-pressure membrane, 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 membrane is cut by a cutter to facilitate the separation of the high-pressure membrane from the cover plate, and then the filter cloth and the cover plate are clamped by the clamping member, thereby achieving 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 an annular shape and concentrically with the cover plate.

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

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

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

[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 high-pressure film cutting step, the position of the cutter is confirmed, and when 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 high pressure film can be cut without the blade of the cutter contacting the groove wall of the cutting groove, thereby reducing the wear of the cutter.

[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 extend and retract the clamping rod, the head of the clamping rod is hemispherical, and the side wall of the clamping rod fits with the cutting groove.

[0016] By adopting the above technical solution, when the clamping rod is extended 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 membrane, the distance between the incision of the high-pressure membrane and the bottom of the cutting groove is smaller 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 is completed, during the rising process, the contact area between the high-pressure membrane and the filter cloth can be effectively reduced, thereby reducing the probability of the filter cloth falling off due to the friction between the high-pressure membrane and the filter cloth during the rising process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the molding device of this application.

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

[0021] Figure numerals: 1, outer mold; 2, high-pressure membrane; 3, rubber sleeve; 4, filter cloth; 5, cover plate; 51, cutting groove; 6, material taking tray; 61, edging; 62, cutting knife; 63, clamping rod. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings.

[0023] Reference Figure 1 and Figure 2 , which is an ultra-large-scale isostatic pressing molding process disclosed in the present application, including the following steps: a placing step, placing the inner mold and the outer mold 1 at preset positions, placing the high-pressure membrane 2 and the rubber sleeve 3 at preset positions, a powder injection step, injecting the powder into the preset position in the rubber sleeve 3; a leveling step, leveling the upper surface of the powder; a pressing 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, a molding step, sealing and evacuating the high-pressure membrane 2, and then sending it into the isostatic pressing chamber for molding, a material taking step, cutting the high-pressure membrane 2, clamping the contact between the filter cloth 4 and the cover plate 5, and transferring the cover plate 5 and the filter cloth 4.

[0024] In the material picking step, a material picking device is used, which includes a material picking tray 6 and a driving assembly. The driving assembly includes a rotating part and a lifting part. In the present embodiment, the rotating part is a motor, which is used to drive the material picking tray 6 to rotate. In the present embodiment, the lifting part is a hydraulic cylinder, which is used to drive the rotating part to rise and fall. The material picking tray 6 is provided with a edging 61, which is used to wrap the side wall of the covering plate 5. A cutter 62 and a clamping part are provided on the edging 61. 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 membrane 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 has cutting grooves 51 on the inner wall and the side wall. The cutting groove 51 is annular and concentric with the cover plate 5 .

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

[0027] In the forming step, when the high-pressure film 2 is vacuumed, the high-pressure film 2 is initially squeezed so that the high-pressure film 2 fits the rubber sleeve 3, the cover plate 5, and the groove wall of the cutting groove 51, and then the high-pressure film 2 is sealed, and a vacuum port is left, and then vacuum is drawn through the vacuum 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 so that the high pressure film 2 is separated from the groove wall of the cutting groove 51, and then the pressure is maintained. In the step of cutting the high pressure film 2, the position of the cutter 62 is confirmed. When it is confirmed, the high pressure film 2 is cut. The distance between the incision of the high pressure film 2 and the groove bottom of the cutting groove 51 is less than the distance between the filter cloth 4 and the groove bottom of the cutting groove 51. In the process of confirming the position of the cutter 62, the extension distance of the cutter 62 and the groove depth of the cutting groove 51 are compared, that is, the tip of the cutter 62 does not contact the groove wall of the cutting groove 51 (for example, in order to ensure a good cutting effect, the tip of the cutter 62 does not contact the groove wall of the cutting groove 51, for example, the interval is 1mm, and the interval can be adjusted in different embodiments), and the position meets the standard. Due to the existence of the rubber sleeve 3 and the existence of the cutting groove 51, the cutter 62 can have a good cutting effect on the high pressure film 2 after extending into the cutting groove 51.

[0029] The implementation principle of this embodiment is: in use, the high-pressure membrane 2 is cut, and then the filter cloth 4 and the cover plate 5 are clamped and transferred by the clamping member. During the transfer process, the cut high-pressure membrane 2 is also transferred, thereby simplifying the material removal steps.

[0030] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An isostatic pressing process for super large specifications, characterized in that: The method comprises the following steps: a powder injection step, in which the powder is injected into a preset position in the rubber sleeve (3); a leveling step, in which the upper surface of the powder is leveled; a plate pressing step, in which a filter cloth (4) is laid on the upper surface of the powder, and then a cover plate (5) is placed on the upper surface of the filter cloth (4), at which time, the side walls of the filter cloth (4) and the cover plate (5) are in contact with each other and extend out of the upper surface of the rubber sleeve (3); a molding step, in which the high-pressure membrane (2) is sealed and evacuated, and then sent into an isostatic pressing chamber for molding; and a material taking step, in which the high-pressure membrane (2) is cut, and the contact point between the filter cloth (4) and the cover plate (5) is clamped to transfer the cover plate (5) and the filter cloth (4).

2. The super-large-size isostatic pressing process according to claim 1, characterized in that: In the material taking step, a material taking device is used, which comprises a material taking tray (6) and a driving assembly, wherein the driving assembly comprises a rotating part and a lifting part, wherein the rotating part is used to drive the material taking tray (6) to rotate, and the lifting part is used to drive the rotating part to lift and lower, and the material taking tray (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), and the edge wrapping (61) is provided with a cutter (62) and a clamping part, and the position of the cutter (62) is higher than the position of the clamping part, and the cutter (62) is used to cut the high-pressure membrane (2), and the clamping part is used to clamp the filter cloth (4) and the cover plate (5).

3. The super-large-size isostatic pressing process according to claim 2, characterized in that: A cutting groove (51) is provided on the side wall of the cover plate (5), and the cutting groove (51) is arranged in an annular shape and is concentric with the cover plate (5).

4. The super-large-size isostatic pressing process according to claim 3, characterized in that: In the forming step, when the high-pressure film (2) is evacuated, the high-pressure film (2) and the groove wall of the cutting groove (51) are made to fit together.

5. The super-large-size isostatic pressing process according to claim 4, 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. Once confirmed, the high-pressure film (2) is cut.

6. The super-large-size isostatic pressing process according to claim 5, characterized in that: The clamping member comprises a clamping rod (63) and a telescopic member, wherein the telescopic member 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 the cutting groove (51).

7. The super-large-size isostatic pressing process according to claim 5, characterized in that: In the step of cutting the high-pressure membrane (2), the distance between the cut of the high-pressure membrane (2) and the bottom of the cutting groove (51) is smaller than the distance between the filter cloth (4) and the bottom of the cutting groove (51).

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