Ceramic shell sintering auxiliary tool

Abstract

The utility model discloses a ceramic shell sintering auxiliary tool which comprises a sintering bearing body, the sintering bearing body comprises a base and a limiting table, the limiting table is fixedly arranged at the upper end of the base, a ceramic biscuit is placed on the base, and the boundary dimension of the limiting table is matched with the size of the inner wall of the ceramic biscuit. According to the sintering device, the ceramic biscuit is supported by the sintering bearing body matched with the ceramic biscuit in size, sintering deformation of the open end of the ceramic shell with one open end is controlled through the limiting table, sintering deformation of the ceramic shell is well controlled, waste products are greatly reduced, product quality is improved, and product consistency is good.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic production, in particular to a ceramic shell sintering auxiliary tooling. Background Art

[0002] Different usage environments have different requirements for the packaging protection capabilities of devices. For harsh usage scenarios such as automobiles, or usage environments with high temperature, high humidity, large temperature differences, corrosive gases, etc., ceramics are usually selected as the external packaging shell of the device.

[0003] Ceramics have high hardness, wear resistance, unique texture and gloss, providing better protection; they also have good heat dissipation performance and electromagnetic shielding effect, and have great advantages in electrical insulation, mechanical strength, packaging airtightness, etc. Therefore, the ceramic shell provides protection for the on-off of the current, high temperature, high pressure and insulation, and becomes a core component. However, the ceramic shell shrinks a certain amount during the sintering process, and the ceramic shell produced using the conventional mold structure has the problem of dimensional deformation during the sintering process, so that the final produced ceramic shell cannot accurately meet the design requirements, resulting in low packaging reliability of the final device.

[0004] Existing ceramic shell with hole structure such as Figure 1 As shown in the figure, the shell is rectangular with rounded corners, one end is open, and the other end is provided with a through hole. Since the ceramic shrinks to a certain extent during the sintering process, the ceramic shell produced by the conventional sintering process is prone to shrinkage around the periphery after sintering, resulting in a final shape in which the size of the ceramic shell is large in the middle and convex, as shown in the figure. Figure 2 shown. Utility Model Content

[0005] The utility model aims to provide a ceramic shell sintering auxiliary tool which has a simple structure and can effectively control sintering deformation and reduce waste.

[0006] In order to achieve the above object, the utility model adopts the following technical solution:

[0007] A ceramic shell sintering auxiliary tooling includes a firing body, the firing body includes a base and a limit platform, the limit platform is fixedly arranged on the upper end of the base, a ceramic blank is placed on the base, and the outer dimensions of the limit platform match the inner wall dimensions of the ceramic blank.

[0008] Preferably, the ceramic blank is a rectangular hollow ceramic blank with an opening at one end, and at least one first through hole is provided on the end away from the opening.

[0009] Preferably, a second through hole is provided in the middle of the base and the limiting platform, and the two second through holes are coaxially arranged.

[0010] Preferably, the base and the limiting platform are both rectangular structures, the limiting platform is arranged in the middle of the base, and the area of ​​the limiting platform is smaller than the area of ​​the base.

[0011] Preferably, the thickness of the base is 8-10 mm, and the height of the limiting platform is 2-3 mm.

[0012] Preferably, the diameter of the first through hole is 5-10 mm, and the diameter of the second through hole is 5-10 mm.

[0013] Preferably, inclined surfaces are arranged around the limiting platform, and the angle between the inclined surfaces and the upper surface of the base is 120 degrees.

[0014] Preferably, the contact surface between the base and the opening is provided with isolation powder; the contact surface between the limit platform and the opening is provided with isolation powder.

[0015] Preferably, the isolation powder is a thin layer of corundum sand.

[0016] Preferably, the base, the limiting platform and the ceramic blank are made of the same material.

[0017] By adopting the above-mentioned design scheme, the beneficial effects of the utility model are: the ceramic green blank is supported by a support body that matches the size of the ceramic green blank, and the sintering deformation of the open end of the ceramic shell is controlled by a limit table, so the sintering deformation of the ceramic shell is well controlled, waste is greatly reduced, product quality is improved, and product consistency is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the structure of a ceramic shell;

[0019] Figure 2 It is a schematic diagram of the structure of the prior art ceramic shell after sintering deformation;

[0020] Figure 3 It is a schematic diagram of the structure of the utility model;

[0021] Figure 4 It is a cross-sectional view of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the utility model when used in conjunction with a ceramic housing;

[0023] In the figure:

[0024] The sintering body 1 , the base 11 , the limiting platform 12 , the inclined surface 121 , the second through hole 13 , the ceramic blank 2 , the ceramic shell 2 ′, the opening 21 , the first through hole 22 , and the isolation powder 3 . DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Reference Figure 1 , Figure 3-Figure 5

[0027] The utility model is to customize auxiliary tooling for a specific ceramic shell 2' (which will be described in detail below).

[0028] A ceramic shell sintering auxiliary tool comprises a sintering body 1 and a ceramic blank 2 (or a ceramic shell 2'). It is worth noting that in this embodiment, the ceramic shell 2' is a sintered product of the ceramic blank 2, and the ceramic blank 2 is used in the following description.

[0029] The ceramic blank 2 is a rectangular hollow ceramic blank 2 with an opening 21 at one end, and at least one first through hole 22 is provided on the end away from the opening 21. During sintering, heat can enter the interior of the ceramic blank 2 from the first through hole 22 of the ceramic blank 2, and the heat inside the ceramic blank 2 can also be dissipated from the first through hole 22, so as to achieve the effect of balancing the temperature field and ensure the uniformity of the sintering temperature. Preferably, there are two first through holes 22, which are symmetrically arranged on both sides of the ceramic blank 2.

[0030] The firing body 1 includes a base 11 and a limit platform 12. The limit platform 12 is fixedly arranged at the upper end of the base 11. The ceramic blank 2 is placed on the base 11, and the outer dimensions of the limit platform 12 match the inner wall dimensions of the ceramic blank 2, so that the limit platform 12 can just be embedded in the inner wall of the opening 21 of the ceramic blank 2, thereby generating radial contraction limit to the opening 21 of the ceramic blank 2.

[0031] Preferably, a second through hole 13 is provided in the middle of the base 11 and the limit platform 12, and the two second through holes 13 are coaxially arranged. The design of the second through hole 13 prevents the base 11 and the limit platform 12 from cracking and shrinking in the same direction during sintering. At the same time, during sintering, heat can enter the interior of the ceramic blank 2 from the second through hole 13, and heat can also be dissipated from the second through hole 13, further achieving the effect of balancing the temperature field and ensuring the uniformity of the sintering temperature.

[0032] Preferably, the base 11 and the limiting platform 12 are both rectangular structures, the limiting platform 12 is arranged in the middle of the base 11 , and the area of ​​the limiting platform 12 is smaller than that of the base 11 .

[0033] Furthermore, the thickness of the base 11 is 8-10 mm, the thickness of the limiting platform 12 is 2-3 mm, the diameter of the second through hole 13 is 10 mm, and the four corners of the limiting platform are consistent with the appearance of the product.

[0034] The limiting platform 12 is provided with inclined surfaces 121 around its periphery. The angle between the inclined surface 121 and the upper surface of the base 1 is 120 degrees. The purpose of increasing the inclined angle of 120 degrees is to prevent the ceramic blank 2 and the limiting platform 12 from sticking to each other during sintering.

[0035] Preferably, the contact surface between the base 11 and the opening 21 is provided with isolation powder 3, and the contact surface between the stopper 12 and the opening 21 is provided with isolation powder 3. Specifically, the isolation powder 3 is a thin layer of corundum sand, and the thin layer of corundum sand is provided to prevent the base 11 and the stopper 12 from being sintered together with the opening 11 of the ceramic blank 2, so as to facilitate demoulding after sintering.

[0036] Preferably, the base 11, the stopper 12 and the ceramic blank 2 are made of the same material. In a specific embodiment, the base 11 and the stopper 12 are made of the same material as the ceramic blank 2, so that during the sintering process, the base 11 and the stopper 12 can shrink synchronously with the ceramic blank 2, so that the size consistency of the ceramic blank 2 is better.

[0037] Before sintering, firstly, a thin layer of corundum sand is evenly sprinkled on the surface of the base 11 and the limiting platform 12, and then the opening 21 end of the ceramic blank 2 is placed on the limiting platform 12 of the sintering body 1. At this time, the opening 21 is placed on the base 11 and is sleeved on the outside of the limiting platform 12; the inner wall of the ceramic blank 2 is controlled by the limiting platform 12, thereby achieving the effect of controlling the sintering deformation of the opening 21 of the ceramic blank 2.

[0038] By adopting the above-mentioned design scheme, the beneficial effects of the utility model are: the ceramic green blank 2 is supported by the support body 1 which matches the size of the ceramic green blank 2, and the sintering deformation of the opening 21 end of the ceramic shell is controlled by the limit platform 12, so that the sintering deformation of the ceramic shell is well controlled, the waste is greatly reduced, the quality of the product is improved, and the consistency of the product is better.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ceramic shell sintering auxiliary tool, characterized in that: It includes a firing body, which includes a base and a limit platform. The limit platform is fixedly arranged at the upper end of the base, and the ceramic blank is placed on the base. The outer dimensions of the limit platform match the inner wall dimensions of the ceramic blank. The ceramic blank is a rectangular hollow ceramic blank with an opening at one end, and at least one first through hole is arranged on the end away from the opening. A second through hole is arranged in the middle of the base and the limit platform, and the two second through holes are coaxially arranged. The base and the limit platform are both rectangular structures, and the limit platform is arranged in the middle of the base, and the area of ​​the limit platform is smaller than the area of ​​the base.

2. The ceramic shell sintering auxiliary tooling according to claim 1, characterized in that: The thickness of the base is 8-10 mm, and the height of the limiting platform is 2-3 mm.

3. The ceramic shell sintering auxiliary tooling according to claim 1, characterized in that: The diameter of the first through hole is 5-10 mm, and the diameter of the second through hole is 5-10 mm.

4. The ceramic shell sintering auxiliary tooling according to claim 1, characterized in that: The limiting platform is provided with inclined surfaces around its periphery, and the angle between the inclined surfaces and the upper surface of the base is 120 degrees.

5. The ceramic shell sintering auxiliary tooling according to claim 1, characterized in that: The contact surface between the base and the opening is provided with isolation powder; the contact surface between the limit platform and the opening is provided with isolation powder.

6. The ceramic shell sintering auxiliary tooling according to claim 5, characterized in that: The isolation powder is a thin layer of corundum sand.

7. The ceramic shell sintering auxiliary tool according to claim 1, characterized in that: The base, the limiting platform and the ceramic blank are made of the same material.

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