Sagger for sintering disc-shaped ceramic in kiln

Abstract

The sagger comprises an inner ring, an outer ring and a bottom plate, the top of the inner ring is connected with the top of the outer ring, the bottom plate is arranged at the bottom of the inner ring, the inner ring is divided into a first containing cavity and a second containing cavity by the bottom plate, the first containing cavity is used for containing ceramic to be sintered, a first through hole is formed in the inner ring, and a second through hole is formed in the second containing cavity. A second through hole is formed in the bottom plate, and a third containing cavity is formed between the outer ring and the inner ring. Third through holes are formed in the side edge of the outer ring. Fourth through holes are formed in the top of the outer ring. And a first ceramic fiber cotton layer is arranged in the second accommodating cavity. And a second ceramic fiber cotton layer is arranged in the third accommodating cavity. A plurality of heat conduction columns are arranged on the bottom plate and are of hollow structures with the bottoms open and the tops closed, fifth through holes are formed in the side walls of the heat conduction columns, and third ceramic fiber cotton layers are arranged in the heat conduction columns. The problems that an existing ceramic sintering jig is poor in heat circulation effect, the defective rate of sintered products is high, and the production efficiency is low are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sintering jig field, concretely is a kind of kiln sintering round piece shape ceramic with box. BACKGROUND

[0002] Round piece shape ceramic is usually used to produce valve plate, and sintering is an important step in ceramic processing process, unlike the sintering of other materials, ceramic is formed by using binder in the forming process, and by sintering with powder to obtain high-density ceramic products.Box is the loading jig of ceramic sintering, the ceramic after forming is placed in the box, and is sent into heating furnace for heating to obtain ceramic products.

[0003] In order to improve the utilization rate of heat energy, the existing technology usually adopts the way of opening hole. For example, the Chinese patent with publication number CN201779996U discloses a box for sintering ceramic capacitor medium, which is provided with grooves on the bottom surface and side surface to reduce the heat absorption of the box and facilitate ventilation. In order to improve production efficiency, the sintering method of multiple ceramic laminates is currently used. In order to prevent adjacent products from sticking and cracking and deforming, powder needs to be distributed in the box. The porous box will cause powder penetration, which is not conducive to production. If the box is not porous, it is difficult to ensure ventilation and heat transfer. At the same time, since there is a binder such as paraffin in the ceramic sheet blank, the paraffin needs to be removed during the sintering process. The existing equipment has a high rate of defective products during production, which is not conducive to production. SUMMARY

[0004] The utility model aims at providing a kind of kiln sintering round piece shape ceramic with box to solve the problems of existing ceramic sintering jig, poor heat flow effect, high product defective rate after sintering and low production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of kiln sintering round piece shape ceramic with box, including inner ring, outer ring and bottom plate, the inner ring and outer ring top are connected, the bottom plate is set in inner ring bottom, the inner ring is divided into first accommodating cavity and second accommodating cavity by bottom plate, the first accommodating cavity is used to hold ceramic to be sintered, the first through hole is formed in the inner ring, the second through hole is formed in the bottom plate, and the third accommodating cavity is arranged between the outer ring and the inner ring.

[0006] As a further improvement of the above technical solution:

[0007] The third through hole is arranged on the side edge of the outer ring.

[0008] The fourth through hole is arranged on the top of the outer ring.

[0009] The first ceramic fiber layer is arranged in the second accommodating cavity.

[0010] The second ceramic fiber layer is arranged in the third accommodating cavity.

[0011] The bottom plate is provided with a plurality of heat-conducting columns, the heat-conducting column is a hollow structure with an open bottom and a closed top, a fifth through hole is formed in the side wall of the heat-conducting column, and a third ceramic fiber cotton layer is arranged in the heat-conducting column.

[0012] Compared with the prior art, the kiln sintering ceramic box of the present application has the following beneficial effects:

[0013] Improved thermal efficiency: By setting the multi-angle through hole, the multi-angle circulation of the heat atmosphere is realized, the utilization rate and the uniformity of heat distribution are improved, and the sintering efficiency is improved.

[0014] Good air permeability: The use of ceramic fiber cotton layer has good air permeability, which helps heat transfer and smoke exhaust, and reduces the rate of defective products in the sintering process.

[0015] Improved product quality: The heat distribution in the sintering process is more uniform through the multi-angle heat atmosphere circulation, which improves the quality and yield of ceramic products.

[0016] Simple operation: The ceramic fiber cotton layer is simple to lay and the special accommodating cavity is provided for the ceramic fiber cotton layer, which is convenient to operate and improves the production efficiency.

[0017] The kiln sintering ceramic box of the present application optimizes the utilization of heat, reduces energy consumption, meets the requirements of energy saving and emission reduction, has certain environmental protection benefits, and solves the problems of poor heat circulation effect of the existing ceramic sintering tool, high defective product rate after sintering, and low production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an external structure schematic view of the box of the present application embodiment 1.

[0019] Figure 2 It is an internal structure schematic view of the box of the present application embodiment 1.

[0020] Figure 3 It is an external structure schematic view of the box of the present application embodiment 2.

[0021] Figure 4 It is an external structure schematic view of the box of the present application embodiment 2.

[0022] Figure 5 It is an internal structure schematic view of the box of the present application embodiment 2.

[0023] Figure 6 It is a top view structure schematic view of the box of the present application embodiment 3.

[0024] Figure 7 It is an internal structure schematic view of the box of the present application embodiment 4.

[0025] Figure 8 It is the sagger hot flow passage structure schematic view of the embodiment 4 of the utility model.

[0026] The signs:1, inner ring;11, first accommodating cavity;12, second accommodating cavity;13, first through hole;14, second through hole;15, first ceramic fiber cotton layer;16, second ceramic fiber cotton layer;17, third ceramic fiber cotton layer;2, outer ring;21, third accommodating cavity;22, third through hole;23, fourth through hole;3, bottom plate;4, heat conduction column;41, fifth through hole. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0028] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The indicated device or element must have a specific orientation, a specific orientation and operation, so it cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through an intermediate medium;It can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled persons in the art without creative labor belong to the scope of protection of the utility model.

[0031] Embodiment 1

[0032] As Figure 1 And Figure 2As shown, the kiln sintering slab ceramic sagger of this embodiment includes an inner ring 1, an outer ring 2, and a bottom plate 3. The inner ring 1 and the outer ring 2 are connected at the top, and the bottom plate 3 is disposed at the bottom of the inner ring 1. The inner ring 1 is divided into a first receiving cavity 11 and a second receiving cavity 12 by the bottom plate 3. The first receiving cavity 11 is used to hold the ceramic to be sintered. A first through hole 13 is provided on the inner ring 1, and a second through hole 14 is provided on the bottom plate 3. A third receiving cavity 21 is provided between the outer ring 2 and the inner ring 1. In this embodiment, hot air can enter through the first through hole 13 and the second through hole 14, and it can be used as a general sintering fixture.

[0033] Example 2

[0034] like Figures 3 to 5 As shown, based on Embodiment 1, this embodiment has a third through hole 22 on the side of the outer ring 2. This is also used as a general sintering fixture.

[0035] Because ceramic valve plates are prone to deformation during sintering, they are typically sintered by laying alumina powder. Therefore, a first ceramic fiber cotton layer 15 is provided in the second accommodating cavity 12. A second ceramic fiber cotton layer 16 is provided in the third accommodating cavity 21. The ceramic fiber cotton layer prevents powder from leaking out of the through holes and also has good air permeability and high temperature resistance.

[0036] Example 3

[0037] like Figure 6 As shown, in order to improve the efficiency of hot air circulation, a fourth through hole 23 is provided at the top of the outer ring 2 in this embodiment. The provision of the fourth through hole 23 increases the number of air vents in the third accommodating cavity 21, which is beneficial for heat circulation and facilitates the discharge of fumes generated during the wax removal process.

[0038] Example 4

[0039] like Figure 7 As shown, in this embodiment, a plurality of heat-conducting pillars 4 are provided on the base plate 3. The heat-conducting pillar 4 is a hollow structure with an open bottom and a closed top. A fifth through hole 41 is provided on the side wall of the heat-conducting pillar 4, and a third ceramic fiber cotton layer 17 is provided inside the heat-conducting pillar 4. Figure 8 The diagram shows a schematic of the hot airflow direction in Example 4. The arrows indicate the direction of heat flow, and the arrows can be reversed for use in smoke extraction or airflow direction. Since the ceramic embedded in the center heats up slowly during sintering, multiple heat-conducting columns 4 are used to evenly distribute the heat. Because the installation of these heat-conducting columns reduces the sintering volume, this approach is generally not chosen when considering production volume. However, it can be used when considering sintering quality. A suitable approach can be selected based on a comprehensive evaluation of production costs.

[0040] The aforementioned ceramic fiber cotton layers are all made of alumina ceramic fiber, which has the functions of high temperature resistance and good breathability. At the same time, the inner ring 1, outer ring 2, and bottom plate 3 are made of high temperature resistant metal alloy materials, which have a long service life.

[0041] In use, each ceramic fiber cotton layer is placed into the corresponding accommodating cavity, the bottom layer of alumina powder is laid, the alumina ceramic green body to be sintered (the green body to be sintered) is put in, the first accommodating cavity 11 is filled in the mode of laying one layer of ceramic product and one layer of alumina powder, the sagger is placed into the sintering kiln for sintering, the hot atmosphere can enter the sagger from multiple angles, the heat distribution can be effectively ensured, the sintering efficiency is improved, and the defective rate is reduced.

[0042] The above is only the embodiment of the present application, and the well-known specific structure and characteristics and other common knowledge in the scheme are not described in detail. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A saggar for use in a kiln to sinter a ceramic disc, characterized in that: The utility model relates to a sintering device for ceramic, which comprises an inner ring (1), an outer ring (2) and a bottom plate (3), the top of the inner ring (1) and the outer ring (2) are connected, the bottom plate (3) is arranged at the bottom of the inner ring (1), the inner ring (1) is divided into a first accommodating cavity (11) and a second accommodating cavity (12) by the bottom plate (3), the first accommodating cavity (11) is used for containing ceramic to be sintered, a first through hole (13) is formed in the inner ring (1), a second through hole (14) is arranged on the bottom plate (3), and a third accommodating cavity (21) is arranged between the outer ring (2) and the inner ring (1).

2. The kiln sintering saggar for ceramic use according to claim 1, characterized in that: A third through hole (22) is arranged on the side of the outer ring (2).

3. The kiln sintering saggar for ceramic use according to claim 2, characterized in that: A fourth through hole (23) is arranged on the top of the outer ring (2).

4. The kiln sintering saggar for ceramic use according to claim 3, characterized in that: A first ceramic fiber cotton layer (15) is arranged in the second accommodating cavity (12).

5. The kiln sintering saggar for ceramic use according to claim 4, characterized in that: A second ceramic fiber cotton layer (16) is arranged in the third accommodating cavity (21).

6. The kiln sintering saggar for ceramic use according to any one of claims 1 to 5, characterized in that: A plurality of heat-conducting columns (4) are arranged on the bottom plate (3), the heat-conducting column (4) is a hollow structure with an open bottom and a closed top, a fifth through hole (41) is formed in the sidewall of the heat-conducting column (4), and a third ceramic fiber cotton layer (17) is arranged in the heat-conducting column (4).

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