Cylindrical isostatic pressing graphite forming device

Abstract

The utility model discloses a cylindrical isostatic pressing graphite forming device which comprises a base, a cover plate, a first positioning sleeve, a second positioning sleeve and an elastic rubber mold, the first positioning sleeve is arranged on the base, the second positioning sleeve is concentrically arranged in the first positioning sleeve, a cylindrical cavity is formed between the inner wall of the first positioning sleeve and the outer wall of the second positioning sleeve, and the elastic rubber mold is arranged in the cylindrical cavity. The elastic rubber mold comprises an outer rubber sleeve, an inner rubber sleeve and a ring piece, the top of the outer rubber sleeve is provided with a first turnup which is turned outwards to the top of the first positioning sleeve, the top of the inner rubber sleeve is provided with a second turnup which is turned inwards to the top of the second positioning sleeve, and the cover plate is arranged above the first turnup and the second turnup to be pressed and fixed. According to the cylindrical isostatic pressing graphite forming device, the sealing effect of the elastic rubber mold is improved, the cover plate is pulled and fixed through the pull rod, the structure is stable, the problems of inclination and bending deformation of the elastic rubber mold are solved, and blank forming of cylindrical isostatic pressing graphite is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of isostatic graphite forming, in particular to a cylindrical isostatic graphite forming device. Background Art

[0002] Isostatic graphite needs to be formed into a green body by an isostatic press, and the green body is calcined and graphitized to obtain artificial graphite material.

[0003] In the process of isostatic graphite being formed into a green body by an isostatic press, the powder needs to be first loaded into a sealed, elastic molding device (usually a rubber mold), and then the molding device is placed in a container containing liquid or gas. Under the action of the isostatic press, the liquid or gas applies a certain pressure to the molding device to press the powder into a solid.

[0004] For solid blanks, rubber molds can be well molded, but for hollow blanks, it is difficult to mold them simply by relying on rubber molds. For example, larger cylindrical isostatic graphite requires larger rubber molds, which are easy to deform during use and difficult to seal, resulting in low yields, and need to be improved. Utility Model Content

[0005] The utility model aims to provide a cylindrical isostatic graphite forming device, which is convenient for forming a cylindrical isostatic graphite blank and improves the yield rate.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A cylindrical isostatic graphite forming device comprises: a base, a cover plate, a first positioning sleeve, a second positioning sleeve and an elastic rubber mold, wherein the first positioning sleeve is arranged on the base, a positioning hole corresponding to the first positioning sleeve is arranged in a concave manner on the base, the second positioning sleeve is arranged concentrically in the first positioning sleeve, a cylindrical cavity is formed between the inner wall of the first positioning sleeve and the outer wall of the second positioning sleeve, a positioning column extending upward into the second positioning sleeve is arranged in the positioning hole, the elastic rubber mold is arranged in the cylindrical cavity, the elastic rubber mold comprises an outer rubber sleeve, an inner rubber sleeve and an annular sheet, the inner rubber sleeve is arranged on the outer wall of the second positioning sleeve, the outer rubber sleeve is arranged on the inner wall of the first positioning sleeve, the annular sheet is connected to the bottom of the outer rubber sleeve and the inner rubber sleeve, a first flange turned outward to the top of the first positioning sleeve is arranged on the top of the inner rubber sleeve, a second flange turned inward to the top of the second positioning sleeve is arranged on the top of the inner rubber sleeve, the cover plate is arranged above the first flange and the second flange for pressing and fixing, a pull rod which passes through the cover plate upward is arranged in an annular array on the base, and a nut located above the cover plate is arranged on the pull rod.

[0008] Wherein, the first positioning sleeve and the second positioning sleeve are densely covered with air holes.

[0009] Wherein, the bottom of the cover plate is provided with an annular plug extending into the elastic rubber mold.

[0010] Wherein, an annular pressing block is arranged in the elastic rubber mold.

[0011] Wherein, both ends of the pull rod are respectively provided with a section of external thread, and the base is provided with a first threaded hole corresponding to the pull rod in a circular array.

[0012] Wherein, the outer rubber sleeve, the inner rubber sleeve and the ring piece adopt an integrated rubber structure.

[0013] Wherein, a lifting ring is arranged on the cover plate.

[0014] Wherein, a second threaded hole pointing to the elastic rubber mold is vertically arranged on the cover plate, and a one-way valve is arranged on the second threaded hole.

[0015] The beneficial effects of the utility model include: a cylindrical isostatically pressed graphite molding device, after pouring powder into an elastic rubber mold, pressing and fixing the first flange and the second flange through a cover plate, thereby improving the sealing effect of the elastic rubber mold, and using a pull rod to pull and fix the cover plate, with a stable structure and convenient hoisting, and supporting the outside and inside of the elastic rubber mold through a first positioning sleeve and a second positioning sleeve, thereby avoiding the problems of tilting and bending deformation of the elastic rubber mold, being beneficial to the blank molding of large cylindrical isostatically pressed graphite and improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 Top view of the center base. DETAILED DESCRIPTION

[0018] Combine the following Figure 1 to Figure 2 The technical solution of the utility model is further illustrated by specific embodiments.

[0019] like Figure 1 The cylindrical isostatic graphite forming device shown in the figure comprises: a base 1, a cover plate 2, a first positioning sleeve 11, a second positioning sleeve 12 and an elastic rubber mold, wherein the first positioning sleeve 11 is arranged on the base 1, and a positioning hole 16 corresponding to the first positioning sleeve 11 is arranged in the base 1, such as Figure 2 As shown, the first positioning sleeve 11 is positioned, and assembly is convenient.

[0020] The second positioning sleeve 12 is concentrically arranged in the first positioning sleeve 11 to form a cylindrical cavity between the inner wall of the first positioning sleeve 11 and the outer wall of the second positioning sleeve 12. The positioning hole 16 is provided with a positioning column 13 extending upward into the second positioning sleeve 12 to position the second positioning sleeve 12 and improve the concentricity of the second positioning sleeve 12 and the first positioning sleeve 11.

[0021] The elastic rubber mold is arranged in a cylindrical cavity. In the present embodiment, the elastic rubber mold comprises an outer rubber sleeve 18, an inner rubber sleeve 20 and an annular piece 19. The inner rubber sleeve 20 is arranged on the outer wall of the second positioning sleeve 12, and the outer rubber sleeve 18 is arranged on the inner wall of the first positioning sleeve 11. The annular piece 19 is connected to the bottom of the outer rubber sleeve 18 and the inner rubber sleeve 20 to form an elastic rubber mold with a bottom seal and a cylindrical cavity.

[0022] In this embodiment, the outer rubber sleeve 18, the inner rubber sleeve 20 and the ring piece 19 adopt an integrated rubber structure, which is convenient for production, and the outer rubber sleeve 18 and the inner rubber sleeve 20 have a certain elasticity and can transmit pressure. Figure 1 As shown, the top of the outer rubber sleeve 18 is provided with a first flange 7 turned outward to the top of the first positioning sleeve 11, and the top of the inner rubber sleeve 20 is provided with a second flange 8 turned inward to the top of the second positioning sleeve 12. The cover plate 2 is arranged above the first flange 7 and the second flange 8 for compression and sealing of the elastic rubber mold.

[0023] An annular plug 5 extending into the elastic rubber mold is provided at the bottom of the cover plate 2, and the annular plug 5 improves the sealing effect of the top opening of the elastic rubber mold and the structural stability of the first positioning sleeve 11, the second positioning sleeve 12 and the top of the elastic rubber mold.

[0024] The base 1 is provided with a ring array of tie rods 3 that penetrate the cover plate 2 upwards. The tie rods 3 are provided with nuts 4 located above the cover plate 2. The tie rods 3 are used to tighten the cover plate 2, and the structure is stable. In this embodiment, the two ends of the tie rods 3 are respectively provided with a section of external thread. The base 1 is provided with a ring array, and four first threaded holes 17 corresponding to the tie rods 3 are provided. Figure 2 As shown, four tie rods 3 can be installed to pull the cover plate 2 downward. A lifting ring 9 is provided on the cover plate 2 to facilitate overall lifting.

[0025] An annular pressing block 6 is provided in the elastic rubber mold. After the powder is loaded into the elastic rubber mold, the powder 14 below is flattened by the annular pressing block 6. The first positioning sleeve 11 and the second positioning sleeve 12 support the outside and inside of the elastic rubber mold, thereby avoiding the problem of tilting and bending deformation of the elastic rubber mold after the powder is loaded, facilitating the blank forming of large cylindrical isostatic graphite and improving the yield rate.

[0026] like Figure 1As shown, the cover plate 2 is vertically provided with a second threaded hole 15 pointing to the elastic rubber mold, and the second threaded hole 15 is provided with a one-way valve 10, which is convenient for externally connecting an air extraction mechanism to vacuumize the elastic rubber mold. In this embodiment, the first positioning sleeve 11 and the second positioning sleeve 12 are densely covered with air holes, which are conducive to allowing liquid or gas to enter the cylindrical cavity in the isostatic press, exerting a certain pressure on the elastic rubber mold, and pressing the powder into a cylindrical entity.

[0027] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A cylindrical isostatic graphite forming device, characterized in that: include: The cam is an axially extending portion of the second locating sleeve, wherein the first locating sleeve is provided on the cam and the second locating sleeve is provided on the cam.

2. The cylindrical isostatic graphite forming device according to claim 1, characterized in that: The first positioning sleeve and the second positioning sleeve are densely covered with air holes.

3. The cylindrical isostatic graphite forming device according to claim 1, characterized in that: The bottom of the cover plate is provided with an annular plug extending into the elastic rubber mold.

4. The cylindrical isostatic graphite forming device according to claim 1, characterized in that: An annular pressing block is arranged in the elastic rubber mold.

5. The cylindrical isostatic graphite forming device according to claim 1, characterized in that: The two ends of the pull rod are respectively provided with a section of external thread, and the base is provided with a first threaded hole corresponding to the pull rod in a circular array.

6. The cylindrical isostatic graphite forming device according to claim 1, characterized in that: The outer rubber sleeve, the inner rubber sleeve and the ring piece adopt an integrated rubber structure.

7. The cylindrical isostatic graphite forming device according to claim 1, characterized in that: The cover plate is provided with a lifting ring.

8. The cylindrical isostatic graphite forming device according to claim 1, characterized in that: The cover plate is vertically provided with a second threaded hole pointing to the elastic rubber mold, and the second threaded hole is provided with a one-way valve.

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