Ceramic part forming die

Abstract

The utility model discloses a ceramic part forming die which comprises a base, a steel die is installed on the base, and a rubber sleeve is installed outside the steel die. The bottom of the steel die is sleeved with a lower rubber plug, the top of the steel die is sleeved with an upper rubber plug, and the lower rubber plug and the upper rubber plug are detachably connected with the rubber sleeve. According to the utility model, the steel die, the lower rubber plug, the upper rubber plug and the rubber sleeve are encircled to form the forming cavity, so that the rubber plug and the rubber sleeve can be combined more tightly, the backing ring is placed in the forming cavity, meanwhile, the product can be manufactured in an all-in-one manner, raw materials are effectively saved, the production cost is reduced, the whole device is convenient to fix and seal, the yield can be effectively improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a forming die technical field, concretely relates to a ceramic part forming die. BACKGROUND

[0002] As an important part of new materials, advanced ceramic materials are widely used in high-tech fields such as communication, electronics, aviation, aerospace and military, especially in the application of semiconductor industry. Among them, yttria ceramics are widely used in high-process requirement application environment such as etching machine cavity due to their excellent plasma resistance. At present, yttria ceramic parts are mainly in the form of rings, and the thickness is between several millimeters and tens of millimeters. However, the green strength of yttria is low, the material is brittle, the forming performance is poor, and the formed test piece is easy to crack.

[0003] The existing forming method is to press a special die into a round cake, and the middle hole is processed and removed. The whole processing process will waste a lot of powder materials. Since the cost of yttria and other powders is high, the production cost is high. A cold isostatic pressing special die is disclosed in CN2287066Y, which comprises an outer die and an end plug. The end plug is arranged at both ends of the outer die, a flexible core is arranged in the outer die, and an inner hole is arranged in the flexible core. It is a special die for cold isostatic pressing of long hole parts, which is simple in structure, convenient to use, good in process and high in efficiency. However, the sealing degree between the end plug and the outer die of this die requires very high sealing standard, and the sealing degree will decrease after a period of use, which will cause water to enter and cause the product to be scrapped, UTILITARIAN CONTENT

[0004] The utility model discloses a ceramic part forming die.

[0005] The utility model discloses a ceramic part forming die.

[0006] The base is provided with a steel die, and the steel die is externally provided with a rubber sleeve.

[0007] The lower rubber plug and the upper rubber plug are detachably connected with the rubber sleeve.

[0008] As a further description of the above technical scheme, the steel die is made of stainless steel, and the middle part of the steel die is provided with a hollow part.

[0009] As a further description of the above technical scheme, the bottom of the steel die is provided with a stepped part, and the outer contour of the stepped part is attached to the base.

[0010] As a further description of the above technical solution, the upper rubber plug and the lower rubber plug are made of polyurethane, and the upper rubber plug and the lower rubber plug are profile-fitted with the steel mold.

[0011] As a further description of the above technical solution, the lower rubber plug and the upper rubber plug are provided with a slope portion in the inner diameter direction, and the curvature of the slope portion is 5 degrees.

[0012] As a further description of the above technical solution, the lower rubber plug and the upper rubber plug are provided with a lap portion at the inner side edge, and the lap portion is profile-fitted with the edge of the steel mold.

[0013] As a further description of the above technical solution, the lower rubber plug and the upper rubber plug are provided with a lap portion at the inner side edge, and the lap portion is profile-fitted with the edge of the steel mold.

[0014] As a further description of the above technical solution, the lower rubber plug and the upper rubber plug are provided with a lap portion at the inner side edge, and the lap portion is profile-fitted with the edge of the steel mold.

[0015] As a further description of the above technical solution, the lower rubber plug and the upper rubber plug are provided with a lap portion at the inner side edge, and the lap portion is profile-fitted with the edge of the steel mold.

[0016] As a further description of the above technical solution, the lower rubber plug and the upper rubber plug are provided with a lap portion at the inner side edge, and the lap portion is profile-fitted with the edge of the steel mold.

[0017] The beneficial effects of the present application are as follows:

[0018] 1. The present application, the steel mold, the lower rubber plug, the upper rubber plug and the rubber sleeve form a forming cavity, which can make the rubber plug and the rubber sleeve combine more tightly, and the inner part of the forming cavity is placed with a gasket ring, which can adjust the height of powder forming according to the production needs, and at the same time can make products in one, effectively save raw materials, reduce production cost and effectively improve the yield;

[0019] 2. The present application, the steel mold is provided with a hollow portion in the center, which can ensure that the powder inside and outside is subjected to uniform pressure; the steel mold is provided with a step portion at the bottom, which can make the steel mold and the base combine more firmly and not easy to slide.

[0020] 3. The present application, the lower rubber plug and the upper rubber plug are provided with a slope portion in the inner diameter direction, the lower rubber plug and the upper rubber plug are provided with a lap portion at the inner side edge, and the lower rubber plug and the upper rubber plug are provided with a lap portion at the inner side edge, and the rubber sleeve is embedded after cooperation with the lap to improve the sealing performance.

[0021] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. DRAWINGS

[0022] Figure 1is a structural schematic view of the ceramic part forming die of the utility model;

[0023] Figure 2 is Figure 1 the enlarged schematic view of A-A in figure.

[0024] Reference signs:

[0025] 1, base; 2, steel die; 3, rubber sleeve; 4, lower rubber plug; 5, upper rubber plug; 6, grommet; 7, clamp; 8, lifting ring; 9, hollow part; 10, stepped part; 11, slope part; 12, lap joint part; 13, flanging part; 14, to be formed raw material. Specific implementation

[0026] In order to make the purpose, technical scheme and advantages of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment.

[0027] As Figures 1-2 shown, in one embodiment, a ceramic part forming die, comprising: base 1, the base 1 is installed with steel die 2, and the steel die 2 is externally installed with rubber sleeve 3;The lower rubber plug 4 is set on the bottom of the steel die 2, and the upper rubber plug 5 is set on the top of the steel die 2, and the lower rubber plug 4 and the upper rubber plug 5 are detachably connected with the rubber sleeve 3, which ensures the uniform distribution of the rubber during the forming process and the sealing property during pressing.

[0028] Among them, the base 1 adopts 304 stainless steel material, has excellent corrosion resistance and high strength, can bear the weight of steel die 2, powder to be formed raw material 14, rubber plug and other components;The bottom of the base 1 adopts the design of hollow, which can effectively ensure that the liquid can fully contact the lower end cover of the equipment during cold isostatic pressing operation, so as to realize more uniform pressure distribution and improve the forming effect.

[0029] Further, the steel die 2 is made of stainless steel, which has good corrosion resistance and high strength, and can withstand large pressure during cold isostatic pressing and ensure long-term stable use.

[0030] Specifically, the steel die 2 is provided with a hollow part 9 in the middle, and the liquid fills the inside of the steel die 2 during cold isostatic pressing, so as to ensure that the powder raw material is subjected to uniform pressure inside and outside;The bottom of the steel die 2 is provided with a stepped part 10, and the outer contour of the stepped part 10 is matched with the base 1, so that the steel die 2 and the base 1 can be combined more firmly, and the sliding is not easy, which ensures that the forming pressure is always in a stable state, and further improves the consistency of the product.

[0031] Further, the upper rubber plug 5, the lower rubber plug 4 and the rubber sleeve 3 are made of polyurethane, which has excellent wear resistance, elasticity and strong pressure resistance, and can withstand high pressure without deformation or damage during cold isostatic pressing forming; they are made by injection molding, and the profiles of the upper rubber plug 5 and the lower rubber plug 4 fit the steel mold 2. The rubber plug and the rubber sleeve 3 are made of polyurethane material, which will elastically deform under high pressure, thereby filling the corresponding pores, increasing the contact area and friction, and making the rubber plug and the rubber sleeve 3 more tightly combined.

[0032] Specifically, the lower rubber plug 4 and the upper rubber plug 5 are provided with a slope part 11 in the inner diameter direction, and the curvature of the slope part 11 is 5 degrees, which ensures that the steel mold 2 and the rubber plug are combined more tightly, achieving better sealing effect and avoiding external moisture or liquid penetration; the lower rubber plug 4 and the upper rubber plug 5 are provided with a lap joint part 12 at the inner side edge, the lap joint part 12 is fitted with the edge of the steel mold 2, and the lower rubber plug 4 and the upper rubber plug 5 are provided with a flange part 13 at the outer side edge, the flange part 13 is fitted with the end profile of the rubber sleeve 3, and under the pressure of cold isostatic pressing of 150MPa or 200MPa, there is a conda effect between the flange of the rubber plug and the rubber sleeve 3, which hinders the expansion of the liquid into the powder.

[0033] Please continue to refer to Figures 1-2 In this embodiment, the steel mold 2, the lower rubber plug 4, the upper rubber plug 5 and the rubber sleeve 3 form a forming cavity, and the grommet 6 is placed inside the forming cavity. The grommet 6 is made of rubber material by injection molding, and its main function is to control the height of powder forming. The inner diameter of the grommet is slightly larger than that of the steel mold, and the outer diameter is slightly smaller than the inner diameter of the outer mold, which not only facilitates the taking out and putting in of the grommet 6, but also effectively promotes the discharge of internal gas during the forming process, avoiding the influence of gas retention on the forming effect.

[0034] Further, the lower rubber plug 4 and the upper rubber plug 5 are provided with a clamp 7 outside, the clamp 7 is made of 304 stainless steel, and the size of the clamp 7 can be flexibly selected according to the outer diameter of the outer mold, to ensure the close fit between the clamp 7 and the rubber plug and the rubber sleeve 3. Through the fixing effect of the clamp 7, the bonding force between the rubber plug and the rubber sleeve 3 can be effectively enhanced, thereby ensuring the sealing and stability during the forming process.

[0035] Further, the bottom seat 1 is symmetrically provided with lifting rings 8 at the edge, and the lifting rings 8 are made of high-strength alloy, which has excellent tensile strength and wear resistance, and can withstand a large lifting load. The lifting rings 8 are fixed to the bottom seat 1 by bolts, and the bolts are made of high-strength material to ensure the stable and reliable connection between the lifting rings 8 and the bottom seat 1. During lifting, the lifting load can be evenly distributed by two-point lifting, to ensure that the product will not be displaced or damaged during transportation and installation. This design fully considers the safety and operation convenience of the product, effectively prevents potential dangers during lifting, and ensures safety and stability during handling and installation.

[0036] The specific production process includes:

[0037] (1) Clean the base 1, ensure that the surface is free of foreign matter impurities, so as to avoid affecting the placement of the upper steel mold 2 and the rubber plug;

[0038] (2) Clean the surface of the steel mold 2, apply release agent, and then place it on the base 1, ensure that the steps and the base 1 fit perfectly, and place it stably and cannot be moved;

[0039] (3) Put the lower rubber plug 4 into the steel mold 2, slowly move to the bottom, next to the base 1;

[0040] (4) Place the rubber sleeve 3 into the lower rubber plug 4, ensure that the lower edge of the rubber sleeve 3 and the rubber plug are completely matched, and place it horizontally;

[0041] (5) Add the powder-shaped to-be-formed raw material 14 evenly and slowly to the designed height;

[0042] (6) Put in the gasket ring 6 and the upper rubber plug 5, ensure that it is placed horizontally;

[0043] (7) Fix the two sets of clamps 7 at the positions of the upper and lower rubber plugs 4, and place them horizontally;

[0044] (8) Install the lifting ring 8, and after being fixed firmly, it can be lifted to the cold isostatic pressing machine.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ceramic piece forming mold characterized by, The utility model relates to a rubber sleeve type steel mold, including: The base (1) is installed with the steel mold (2), and the rubber sleeve (3) is installed outside the steel mold (2); The lower rubber plug (4) is sleeved at the bottom of the steel mold (2), and the upper rubber plug (5) is sleeved at the top of the steel mold (2), and the lower rubber plug (4) and the upper rubber plug (5) and the rubber sleeve (3) are detachably connected.

2. The ceramic part forming mold of claim 1, wherein, The steel mold (2) is made of stainless steel, and a hollow part (9) is arranged in the middle of the steel mold (2).

3. The ceramic part forming mold of claim 2, wherein, The bottom of the steel mold (2) is provided with a stepped portion (10), and the stepped portion (10) is matched with the base (1) in outer contour.

4. The ceramic part forming mold of claim 1, wherein, The upper rubber plug (5) and the lower rubber plug (4) are made of polyurethane, and the upper rubber plug (5) and the lower rubber plug (4) are matched with the steel mold (2) in contour.

5. The ceramic part forming mold of claim 4, wherein, The lower rubber plug (4) and the upper rubber plug (5) are provided with a slope portion (11) in the inner diameter direction, and the slope portion (11) has a curvature of 5 degrees.

6. The ceramic part forming mold of claim 4, wherein, The lower rubber plug (4) and the upper rubber plug (5) are provided with a lap joint portion (12) at the inner side edge, and the lap joint portion (12) is matched with the edge of the steel mold (2).

7. The ceramic part forming mold of claim 4, wherein The lower rubber plug (4) and the upper rubber plug (5) are provided with a flanging portion (13) at the outer side edge, and the flanging portion (13) is matched with the end contour of the rubber sleeve (3).

8. The ceramic part forming mold of claim 4, wherein, The lower rubber plug (4) and the upper rubber plug (5) are sleeved with a clamp (7) outside.

9. The ceramic part forming mold of claim 1, wherein, The steel mold (2), the lower rubber plug (4), the upper rubber plug (5) and the rubber sleeve (3) form a forming cavity, and a grommet (6) is placed in the forming cavity.

10. The ceramic part forming mold of claim 1, wherein, Symmetrical lifting rings (8) are arranged at the edge of the base (1).

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