Die assembly for isostatic pressing graphite production

Abstract

The utility model discloses a mould assembly for isostatic pressing graphite production, which comprises a tubular rubber mould, a core rod and plugging assemblies, the core rod is concentrically arranged in the tubular rubber mould, the plugging assemblies are arranged at the two ends of the tubular rubber mould, each plugging assembly comprises a fixed seat, a flange ring, a compression ring and a piston, the fixing seats are arranged at the two ends of the tubular rubber mold, conical blocks which extend into the tubular rubber mold and are connected with the corresponding ends of the core rod are arranged on the inner sides of the fixing seats, the flange rings are arranged on the outer circle of the tubular rubber mold in a sleeving mode and correspond to the fixing seats in a one-to-one mode, and conical holes corresponding to the conical blocks are formed in the inner sides of the flange rings. The pressing rings are concentrically arranged in the tubular rubber mold and correspond to the fixing bases one to one, piston holes corresponding to the pistons are formed in the outer end faces of the fixing bases in an inwards-concave mode, and connecting rods are arranged between the pistons and the pressing rings. According to the die assembly for isostatic pressing graphite production, hollow isostatic pressing graphite rods can be formed, and the product percent of pass is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of isostatic graphite production, in particular to a mold component for isostatic graphite production. Background Art

[0002] In the production process of isostatic graphite, the powder needs to be loaded into the corresponding rubber mold first, and then the rubber mold is transferred to a container containing liquid or gas. Under the action of the isostatic press, the liquid or gas exerts a certain pressure on the rubber mold to press the powder into shape, and finally it is calcined and graphitized.

[0003] In order to obtain hollow isostatic graphite rods, a core rod needs to be placed in the rubber mold for forming the through holes in the isostatic graphite rods. Since the rubber mold has a certain degree of flexibility, the core rod has poor stability in the rubber mold and is easily offset during the isostatic pressing process, resulting in eccentricity or tilt of the through hole, which reduces the qualified rate of the product and needs to be improved. Utility Model Content

[0004] The utility model aims to provide a mold assembly for isostatic graphite production, which is used for forming hollow isostatic graphite rods and improves structural stability.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A mold assembly for isostatic graphite production, comprising: a tubular rubber mold, a core rod and a plugging assembly, wherein the core rod is concentrically arranged in the tubular rubber mold, the plugging assembly is arranged at both ends of the tubular rubber mold, the plugging assembly comprises a fixed seat, a flange ring, a pressure ring and a piston, the fixed seat is arranged at both ends of the tubular rubber mold, a conical block extending into the tubular rubber mold and connected to the corresponding end of the core rod is arranged on the inner side of the fixed seat, the flange ring is sleeved on the outer circle of the tubular rubber mold and corresponds to the fixed seat one by one, a conical hole corresponding to the conical block is arranged on the inner side of the flange ring, the pressure ring is concentrically arranged in the tubular rubber mold and corresponds to the fixed seat one by one, the outer end surface of the fixed seat is concavely arranged with a piston hole corresponding to the piston, the piston is arranged in the piston hole, and a connecting rod is arranged between the piston and the pressure ring.

[0007] Wherein, the flange ring and the fixing seat are connected by a bolt assembly.

[0008] Wherein, a positioning blind hole corresponding to the core rod is concavely arranged at the end of the conical block.

[0009] Wherein, a screw connected to the corresponding end of the core rod is arranged at the end of the fixing seat.

[0010] Wherein, an annular groove is concavely arranged on the outer circle of the piston, and a sealing ring is arranged in the annular groove.

[0011] Wherein, a guide hole corresponding to the connecting rod is arranged in the conical block.

[0012] Wherein, the diameter of the guide hole is smaller than the diameter of the piston hole, and the guide hole is connected with the piston hole to form a stepped hole.

[0013] The beneficial effects of the utility model include: a mold assembly for isostatic graphite production, in which the core rod can be fixed by the sealing assemblies at both ends, thereby improving the stability and concentricity of the core rod in the tubular rubber mold, and forming of hollow isostatic graphite rods is performed, which is beneficial to improving the qualified rate. The two ends of the tubular rubber mold are clamped and fixed by the sealing assemblies, and the sealing performance is good. Moreover, the pressure ring can move inward when the piston is subjected to external pressure, thereby realizing the compaction of the powder in the tubular rubber mold, improving the density of the end of the hollow isostatic graphite rod, and further improving the qualified rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] Combine the following Figure 1 The technical solution of the utility model is further illustrated by specific embodiments.

[0016] A mold assembly for isostatic graphite production comprises: a tubular rubber mold 1, a core rod 2 and a plugging assembly, wherein the core rod 2 is concentrically arranged in the tubular rubber mold 1, and the plugging assembly is arranged at both ends of the tubular rubber mold for plugging.

[0017] In this embodiment, the plugging assembly includes a fixing seat 3, a flange ring 4, a pressure ring 7 and a piston 9. Figure 1 As shown, the fixing seat 3 is arranged at both ends of the tubular rubber mold 1, and a conical block 32 extending into the tubular rubber mold 1 and connected to the corresponding end of the core rod 2 is arranged on the inner side of the fixing seat 3, and a positioning blind hole 31 corresponding to the core rod 2 is arranged inwardly at the end of the conical block 32 to position the two ends of the core rod 2, thereby improving the stability of the core rod 2 after assembly and maintaining the concentricity of the core rod 2 and the tubular rubber mold 1.

[0018] In addition, the ends of the fixing seats 3 are provided with screws 6 connected to the corresponding ends of the core rod 2 , and the structure is firm. The core rod 2 is used to realize the connection and positioning of the fixing seats 3 at both ends.

[0019] The flange ring 4 is sleeved on the outer circle of the tubular rubber mold 1 and corresponds to the fixing seat 3 one by one. The inner side of the flange ring 4 is provided with a tapered hole corresponding to the tapered block 32. The tapered block 32 cooperates with the tapered hole inside the flange ring 4 to achieve the inner and outer clamping and fixing of the end of the tubular rubber mold 1, thereby improving the sealing performance and structural stability. The flange ring 4 is connected to the fixing seat 3 by a bolt assembly 5, and the flange ring 4 is locked by 6 to 8 bolt assemblies 5 in an annular array.

[0020] The pressure ring 7 is concentrically arranged in the tubular rubber mold 1 and corresponds to the fixing seat 3 one by one, and the pressure ring 7 is used to press and fix the two ends of the powder in the tubular rubber mold 1. The outer end surface of the fixing seat 3 is concavely arranged with a piston hole 34 corresponding to the piston 9, and the piston 9 is arranged in the piston hole 34. In this embodiment, the outer circle of the piston 9 is concavely arranged with an annular groove, and a sealing ring 10 is arranged in the annular groove to avoid leakage problems.

[0021] like Figure 1 As shown, a connecting rod 8 is provided between the piston 9 and the pressure ring 7, and a guide hole 33 corresponding to the connecting rod 8 is provided in the conical block 32 to guide the connecting rod 8. In this embodiment, the diameter of the guide hole 33 is smaller than the diameter of the piston hole 34, and the guide hole 33 is connected with the piston hole 34 to form a stepped hole to limit the inward movement of the piston 9.

[0022] After the powder is placed in the tubular rubber mold 1, it is sealed by a sealing component and then placed as a whole in a container containing liquid. Under the action of the isostatic press, a certain pressure is applied to the tubular rubber mold 1 through the liquid to press the powder into shape. At the same time, the liquid is used to apply pressure to the piston 9 in the piston hole 34 to drive the pressure ring 7 to move inward, thereby applying pressure to the powder at both ends of the tubular rubber mold 1, thereby improving the density and qualified rate of the ends of the hollow isostatically pressed graphite rods.

[0023] 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 mold assembly for isostatic graphite production, used for forming hollow isostatic graphite rods, characterized in that: include: A tubular rubber mold, a core rod and a plugging assembly, wherein the core rod is concentrically arranged in the tubular rubber mold, and the plugging assembly is arranged at both ends of the tubular rubber mold. The plugging assembly includes a fixed seat, a flange ring, a pressure ring and a piston. The fixed seat is arranged at both ends of the tubular rubber mold, and a conical block extending into the tubular rubber mold and connected to the corresponding end of the core rod is arranged on the inner side of the fixed seat. The flange ring is sleeved on the outer circle of the tubular rubber mold and corresponds to the fixed seat one by one. A conical hole corresponding to the conical block is arranged on the inner side of the flange ring. The pressure ring is concentrically arranged in the tubular rubber mold and corresponds to the fixed seat one by one. The outer end surface of the fixed seat is concavely arranged with a piston hole corresponding to the piston. The piston is arranged in the piston hole, and a connecting rod is arranged between the piston and the pressure ring.

2. The mold assembly for isostatic graphite production according to claim 1, characterized in that: The flange ring and the fixing seat are connected by a bolt assembly.

3. The mold assembly for isostatic graphite production according to claim 1, characterized in that: The end of the conical block is concavely provided with a positioning blind hole corresponding to the core rod.

4. The mold assembly for isostatic graphite production according to claim 1, characterized in that: The end of the fixing seat is provided with a screw connected with the corresponding end of the core rod.

5. The mold assembly for isostatic graphite production according to claim 1, characterized in that: An annular groove is concavely arranged on the outer circle of the piston, and a sealing ring is arranged in the annular groove.

6. The mold assembly for isostatic graphite production according to claim 1, characterized in that: The conical block is provided with a guide hole corresponding to the connecting rod.

7. The mold assembly for isostatic graphite production according to claim 6, characterized in that: The diameter of the guide hole is smaller than the diameter of the piston hole, and the guide hole is connected with the piston hole to form a stepped hole.

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