Cold isostatic pressing die for efficiently producing large-size ceramic green body

Abstract

The utility model discloses a cold isostatic pressing die for efficiently producing large-size ceramic green bodies, which belongs to the technical field of cold isostatic pressing and comprises a tubular shaping sleeve, a soft exterior sleeve, a soft gasket and a soft upper cover. The soft exterior sleeve is arranged in the shaping sleeve, and the shaping sleeve is matched with the exterior of the soft exterior sleeve in a sliding and inserting manner; the soft gasket is arranged above the soft exterior sleeve, and the diameter of the soft gasket is attached to the inner diameter of the soft exterior sleeve. The soft upper cover is arranged above the soft gasket, and the diameter of the soft upper cover is attached to the inner diameter of the soft exterior sleeve. The mold is simple in structure, convenient to operate, capable of being repeatedly used, suitable for production of large-size ceramic green bodies, low in powder forming loss rate and beneficial to the yield of follow-up production procedures.

Description

Technical Field

[0001] The utility model relates to the technical field of cold isostatic pressing, in particular to a cold isostatic pressing die for efficiently producing large-size ceramic blanks. Background Art

[0002] Cold isostatic pressing is a technology that uses liquid as a pressure medium at room temperature to form powder materials and provide a green body for further sintering, forging or hot isostatic pressing. Existing cold isostatic pressing technologies mostly use polyurethane or rubber as molds. The mold itself is relatively thick and has no support frame, which easily causes uneven pressure. Therefore, it is difficult to form large-sized green bodies and high powder loss after forming is a technical problem that needs to be solved in cold isostatic pressing mold forming. Utility Model Content

[0003] The utility model aims to provide a cold isostatic pressing die for efficiently producing large-sized ceramic green bodies, which solves the problems of difficulty in forming large-sized green bodies and high powder loss after forming in existing cold isostatic pressing dies.

[0004] Technical solution: The utility model provides a cold isostatic pressing mold for efficiently producing large-size ceramic green bodies, including: a shaping sleeve, a soft outer shaping sleeve, a soft gasket, and a soft upper cover, wherein the shaping sleeve is tubular; the soft outer shaping sleeve is arranged in the shaping sleeve, and the shaping sleeve cooperates with the external sliding sleeve of the soft outer shaping sleeve; the soft gasket is arranged above the soft outer shaping sleeve, and the diameter of the soft gasket fits the inner diameter of the soft outer shaping sleeve; the soft upper cover is arranged above the soft gasket, and the diameter of the soft upper cover fits the inner diameter of the soft outer shaping sleeve.

[0005] Furthermore, in the above-mentioned cold isostatic pressing mold for efficiently producing large-sized ceramic green bodies, the shaping sleeve is a rigid support frame, which improves the external support force, makes the pressure uniform during the cold isostatic pressing process, and facilitates the molding of large-sized green bodies.

[0006] Furthermore, in the above-mentioned cold isostatic pressing mold for efficiently producing large-sized ceramic green bodies, the shaping sleeve is made of metal plates welded according to the shape of the pressed green body.

[0007] Furthermore, in the above-mentioned cold isostatic pressing mold for efficiently producing large-sized ceramic bodies, the inner wall of the shaping sleeve is ground, polished or electroplated, so as to facilitate the soft outer sleeve to be inserted into the shaping sleeve and avoid damage to the soft outer sleeve.

[0008] Furthermore, in the above-mentioned cold isostatic pressing mold for efficiently producing large-sized ceramic bodies, the molding sleeve is made of stainless steel.

[0009] Furthermore, in the above-mentioned cold isostatic pressing mold for efficiently producing large-sized ceramic green bodies, the soft outer sleeve, soft gasket and soft upper cover are all made of high-toughness, high-pressure-resistant organic materials using an integral molding process.

[0010] Furthermore, in the above-mentioned cold isostatic pressing mold for efficiently producing large-sized ceramic blanks, the soft outer sleeve, the soft gasket and the soft upper cover are made of polyurethane. The polyurethane material is elastic and can be stretched or expanded for demolding, and the blank can be prevented from being damaged during demolding.

[0011] It can be seen from the above technical scheme that the utility model has the following beneficial effects: the cold isostatic pressing mold for efficiently producing large-size ceramic blanks described in the utility model has a simple structure, is easy to operate, and is reusable. It is suitable for the production of large-size ceramic blanks, has a low powder molding loss rate, and the mold is elastic and can be stretched or expanded for demolding. The blank can be avoided from damage during demolding, which is beneficial to the yield of subsequent production processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the cold isostatic pressing die structure for efficiently producing large-sized ceramic green bodies according to the utility model;

[0013] In the figure: a shaping sleeve 1, a soft outer sleeve 2, a soft gasket 3, and a soft upper cover 4. DETAILED DESCRIPTION

[0014] Example 1

[0015] like Figure 1 A cold isostatic pressing mold for efficiently producing large-size ceramic green bodies is shown, comprising: a shaping sleeve 1, a soft outer shaping sleeve 2, a soft gasket 3, and a soft upper cover 4, wherein the shaping sleeve 1 is tubular; the soft outer shaping sleeve 2 is arranged in the shaping sleeve 1, and the shaping sleeve 1 cooperates with the external sliding sleeve of the soft outer shaping sleeve 2; the soft gasket 3 is arranged above the soft outer shaping sleeve 2, and the diameter of the soft gasket 3 fits the inner diameter of the soft outer shaping sleeve 2; the soft upper cover 4 is arranged above the soft gasket 3, and the diameter of the soft upper cover 4 fits the inner diameter of the soft outer shaping sleeve 2, and the height can be set according to actual production needs.

[0016] In this embodiment, the soft gasket 3 is placed on the upper part of the loaded powder and the lower part of the soft upper cover (4), which can effectively prevent the top of the green body from falling off due to the elastic force during the cold isostatic pressing and significantly reduce the loss rate of the powder.

[0017] In this embodiment, the shaping sleeve 1 is a rigid support frame, and the shaping sleeve 1 is made of stainless steel, which improves the external supporting force, makes the pressure uniform during the cold isostatic pressing process, and facilitates the molding of large-sized embryos.

[0018] In this embodiment, the shaping sleeve 1 is made of metal plates welded according to the shape of the pressed blank.

[0019] Example 2

[0020] On the basis of Example 1, in this example, Figure 1 The cold isostatic pressing mold for efficiently producing large-sized ceramic bodies is shown, wherein the soft outer sleeve 2, the soft gasket 3 and the soft upper cover 4 are all made of high-toughness, high-pressure-resistant organic materials using an integral molding process.

[0021] In this embodiment, the soft outer sleeve 2, the soft gasket 3 and the soft upper cover 4 are made of polyurethane. The polyurethane material is elastic and can be stretched or expanded for demoulding, and the blank can be prevented from being damaged during demoulding.

[0022] In this embodiment, the inner wall of the shaping sleeve 1 is ground, polished or electroplated to facilitate the soft outer sleeve 2 to be inserted into the shaping sleeve 1 and avoid damaging the soft outer sleeve 2.

[0023] It should be noted that the above is only a technical solution of the utility model and is not a limitation. Although the utility model is described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cold isostatic pressing die for efficiently producing large-size ceramic bodies, characterized in that: include: A shaping sleeve (1), wherein the shaping sleeve (1) is tubular; A soft outer sleeve (2), the soft outer sleeve (2) being arranged inside the shaping sleeve (1), the shaping sleeve (1) being matched with an external sliding sleeve of the soft outer sleeve (2); A soft gasket (3), wherein the soft gasket (3) is arranged above the soft outer sleeve (2), and the diameter of the soft gasket (3) fits the inner diameter of the soft outer sleeve (2); A soft upper cover (4) is arranged above the soft gasket (3), and the diameter of the soft upper cover (4) fits the inner diameter of the soft outer sleeve (2).

2. A cold isostatic pressing mold for efficiently producing large-size ceramic bodies according to claim 1, characterized in that: The shaping sleeve (1) is a rigid support frame.

3. The cold isostatic pressing mold for efficiently producing large-size ceramic bodies according to claim 1, characterized in that: The shaping sleeve (1) is made by welding metal plates according to the shape of the pressed blank.

4. The cold isostatic pressing mold for efficiently producing large-size ceramic bodies according to claim 1, characterized in that: The inner wall of the shaping sleeve (1) is ground, polished or electroplated.

5. The cold isostatic pressing mold for efficiently producing large-size ceramic bodies according to claim 1, characterized in that: The shaping sleeve (1) is made of stainless steel.

6. The cold isostatic pressing mold for efficiently producing large-size ceramic bodies according to claim 1, characterized in that: The soft outer sleeve (2), the soft gasket (3) and the soft upper cover (4) are all made of organic materials with high toughness and high pressure resistance by adopting an integral molding process.

7. The cold isostatic pressing mold for efficiently producing large-size ceramic bodies according to claim 1, characterized in that: The material used for the soft outer sleeve (2), the soft gasket (3) and the soft upper cover (4) is polyurethane.

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