CN214353163U - Cold isostatic compaction mould for solid ceramic product - Google Patents

Abstract

The utility model discloses a solid ceramic product cold isostatic compaction mould, which comprises a die body, the mould body includes the mould shell, the mould shell is the soft shell structure, be provided with upper die cover and lower mould lid on the mould shell, the upper die cover can be dismantled with the mould shell and be connected, be the mould chamber between upper die cover and the lower mould lid. The upper die cavity and the lower die cavity are matched with the soft shell of the die to form the die cavity, and the upper die cover and the lower die cover are used for forming and positioning, so that isostatic pressing can be conveniently and efficiently carried out on the solid ceramic blank; the kraft paper mould shell has low cost and high flexibility, and can adapt to the pressure action in the forming process.

Description

Cold isostatic compaction mould for solid ceramic product

Technical Field

The utility model belongs to the technical field of the ceramic manufacture technique and specifically relates to a solid ceramic product cold isostatic compaction mould is related to.

Background

The cold isostatic pressing technology is a common technology in the ceramic forming process, and has the characteristics of simple operation, stable quality, uniform density of formed bodies and capability of forming large-size ceramic blanks. In the cold isostatic pressing process, a ceramic blank is usually formed by using a rubber or chromium-plated steel core rod die.

The rubber and chromium-plated steel core rod die needs to be customized, is high in die cost and is suitable for large-batch order products. When dealing with small-lot orders or sample demands, the product price is high and the competitiveness is lost due to too high mold cost. For example, the "mold for making ceramic ware" disclosed in chinese patent literature, and its publication No. CN1903538, includes: two halves that combine with each other to create an article-forming cavity; one of the halves has a first inlet through which each device injects a liquid under pressure into the article-forming cavity; a variable volume member is located within the cavity; when the molding liquid is injected and the member occupies a predetermined volume of the molding cavity to control the inflow of the liquid along the surface of the molding cavity, second means for injecting the fluid under pressure act on the member and vary the volume of the member between at least two limit states, namely a minimum expansion, an idle state and a maximum expansion operating state; means for controlling and adjusting the degree of filling of the expandable member and the liquid injection pressure, which act on the first and second injection means in such a way as to correlate the injection pressure with the degree of filling of the cavity with liquid. The device customizes a forming cavity according to the product structure and realizes product forming by using the first injection device and the second injection device, but the method has the cost problem of 'one object and one mould', and is not suitable for small-batch order or sample manufacturing.

Disclosure of Invention

Need the customization to each spare part of mould among the prior art, the cost is higher, the not strong problem of general usefulness, the utility model provides a solid ceramic product cold isostatic compaction mould constitutes the mould chamber through soft mould shell cooperation upper mould lid and lower mould lid to rely on upper mould lid and lower mould lid to carry out the shaping location, can convenient efficient carry out isostatic compaction to solid ceramic body.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a solid ceramic product cold isostatic compaction mould, includes the mould body, the mould body includes the mould shell, the mould shell is the soft shell structure, be provided with upper die cover and lower mould lid on the mould shell, upper die cover and mould shell can dismantle and be connected, be the mould chamber between upper die cover and the lower mould lid. The upper die cover and the lower die cover are matched with the die shell to form the whole die cavity, the upper die cavity is separated from the die shell when the soft die is used, raw materials are poured into the die cavity and the upper die cavity is closed, the soft die shell can adapt to the working process of cold isostatic pressing, and the smooth completion of the forming work is ensured.

Preferably, a fixing layer is arranged between the upper die cover and the die shell, and a fixing layer is arranged between the lower die cover and the die shell. The fixed layer is used for connecting the upper die cover and the die shell as well as the lower die cover and the die shell, so that the inner die cavity of the whole die is formed in a closed mode.

Preferably, the mould shell is made of kraft paper.

Furthermore, the upper die cover and the lower die cover are both made of kraft paper. The mould shell, the upper mould cover and the lower mould cover are soft parts, and further are made of kraft paper, the kraft paper is low in cost and high in flexibility, can adapt to the pressure action in the forming process, can adapt to the working characteristics of a cold isostatic pressing forming method, and can be matched with external liquid pressure to smoothly form a blank body in the mould.

Preferably, the sealing layer is further included and is wrapped outside the die body. The sealing layer wraps the whole die body and is used for forming a sealed vacuum cavity outside the die body before cold isostatic pressing, and therefore bubbles and pollution generated by a blank body in the forming process are avoided.

Preferably, the sealing layer is a thin film structure.

Further, the sealing layer is a plastic film layer. The thin film type sealing layer can be attached to the outer part of the shell of the die, the pressure interference of the sealing layer material to the cold isostatic pressing process is minimized, and the cold isostatic pressing accuracy and the ceramic blank forming effect are improved. The plastic film is used as a common material, so that the cost is low, and the use is convenient.

Therefore, the utility model discloses following beneficial effect has: (1) the upper die cavity and the lower die cavity are matched with the soft shell of the die to form the die cavity, and the upper die cover and the lower die cover are used for forming and positioning, so that isostatic pressing can be conveniently and efficiently carried out on the solid ceramic blank; (2) the kraft paper mould shell has low cost and high flexibility, and can adapt to the pressure action in the forming process; (4) the sealing layer is wrapped outside the whole die body and used for forming a sealed vacuum cavity outside the die body before cold isostatic pressing, so that bubbles generated in a blank body in the forming process are prevented from being polluted; (5) the thin film type sealing layer can be attached to the outer part of the mould shell, the interference of the sealing layer material to the pressure in the cold isostatic pressing process is minimized, and the cold isostatic pressing accuracy and the ceramic blank forming effect are improved; (6) simple structure, low cost, short manufacturing period and convenient use.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 100. the die comprises a die body, 1, a lower die cover, 2, an upper die cover, 3, a die shell, 31, a fixing layer, 4, a blank body, 5, a sealing layer, 6 and ceramic powder.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

As shown in fig. 1, the solid ceramic product cold isostatic pressing mold comprises a mold body 100, the mold body comprises a mold housing 3, the mold housing is of a soft shell structure, an upper mold cover and a lower mold cover are arranged on the mold housing, the upper mold cover is detachably connected with the mold housing, and a mold cavity is formed between the upper mold cover and the lower mold cover. The upper die cover and the lower die cover are matched with the die shell to form the whole die cavity, the upper die cavity is separated from the die shell when the soft die is used, raw materials are poured into the die cavity and the upper die cavity is closed, the soft die shell can adapt to the working process of cold isostatic pressing, and the smooth completion of the forming work is ensured.

A fixing layer is arranged between the upper die cover and the die shell, and a fixing layer is arranged between the lower die cover and the die shell. The fixed layer is used for connecting the upper die cover and the die shell as well as the lower die cover and the die shell, so that the inner die cavity of the whole die is formed in a closed mode.

The shell of the mould is made of kraft paper. Furthermore, the upper die cover and the lower die cover are both made of kraft paper. The mould shell, the upper mould cover and the lower mould cover are soft parts, and further are made of kraft paper, the kraft paper is low in cost and high in flexibility, can adapt to the pressure action in the forming process, can adapt to the working characteristics of a cold isostatic pressing forming method, and can be matched with external liquid pressure to smoothly form a blank body in the mould.

The die further comprises a sealing layer, and the sealing layer is wrapped outside the die body. The sealing layer wraps the whole die body and is used for forming a sealed vacuum cavity outside the die body before cold isostatic pressing, and therefore bubbles and pollution generated by a blank body in the forming process are avoided.

The sealing layer is of a thin film structure. Further, the sealing layer is a plastic film layer. The thin film type sealing layer can be attached to the outer part of the shell of the die, the pressure interference of the sealing layer material to the cold isostatic pressing process is minimized, and the cold isostatic pressing accuracy and the ceramic blank forming effect are improved. The plastic film is used as a common material, so that the cost is low, and the use is convenient.

The mould shell is cut by kraft paper and then is enclosed into a circle, and the mould shell is fixedly sealed by a fixing layer; the lower die cover and the die shell are fixedly sealed through a fixing layer; the upper die cover and the die shell are fixedly sealed through a fixing layer; the sealing layer wraps the whole upper die cover, the whole lower die cover and the whole die shell, and the sealing layer is vacuumized, heat-sealed and closed.

The utility model discloses a cold isostatic compaction mould of solid ceramic product, lower mould lid 1 and mould shell 3 are through fixed bed 31 fixed seal, go up mould lid 2 and mould shell 3 and bond fixedly through fixed bed 31, and sealing layer 5 is arranged in outwardly, including lower mould lid 1, mould shell 3, last mould lid 2 parcel, ceramic powder 5 loads in the mould cavity. In the pressing process, the sealing layer 5, the die shell 3, the upper die cover and the lower die cover of the kraft paper are compressed to be small by the conduction of liquid pressure, and simultaneously, the ceramic powder 6 is compressed to be a ceramic blank body 4 with considerable strength. After the pressure is relieved, the ceramic body 4 is taken out of the plastic film sealing layer 5 and the die body 100.

During operation, firstly, the kraft paper lower die cover 1 and the kraft paper die shell 3 are bonded and fixed and sealed by using an adhesive tape, then ceramic powder 6 is filled into the die, the upper die cover 2 and the die shell 3 are fixed and sealed by using a fixing layer, the sealing layer 5 is sleeved on the outermost layer, the outermost layer is vacuumized (the vacuum degree is-0.09 to 0.1 Mpa), and then a heat sealing machine is used for carrying out heat sealing on the sealing layer 5. And (3) putting the whole set of mould into a stainless steel suspension cage, lifting and putting the suspension cage into an isostatic press for pressing (the pressure is 80-150 Mpa). And after pressing is finished, taking out the whole set of die, cutting the sealing layer 5 by using a blade, opening the kraft paper upper die cover 2, and taking out the formed ceramic blank from the die cavity. The pressed green body is intact, has no crack, no water inflow phenomenon, no surface pollution, no air hole and other defects, and the density of the green body is consistent with that of a nearly conventional product. The method has the advantages of convenient and efficient mold preparation and operation processes, low mold manufacturing cost and short period, greatly reduces the production cost, and is very suitable for manufacturing small-batch orders or samples.

In addition to the above embodiments, the technical features of the present invention can be re-selected and combined to form new embodiments within the scope of the claims and the specification of the present invention, which are all realized by those skilled in the art without creative efforts, and thus, the embodiments of the present invention which are not described in detail should be regarded as the specific embodiments of the present invention and are within the protection scope of the present invention.

Claims (7)

1. The utility model provides a solid ceramic product cold isostatic compaction mould, characterized by, includes the mould body, the mould body includes the mould shell, the mould shell is the soft shell structure, be provided with upper die cover and lower mould lid on the mould shell, upper die cover and mould shell can dismantle and be connected, be the mould chamber between upper die cover and the lower mould lid.

2. A solid ceramic product cold isostatic pressing die as claimed in claim 1, wherein said die housing is a kraft paper piece.

3. The solid ceramic product isostatic cool pressing mold according to claim 1, wherein said upper mold cover and said lower mold cover are both made of kraft paper.

4. The solid ceramic product cold isostatic pressing mold according to claim 1, further comprising a sealing layer, wherein said sealing layer is wrapped outside said mold body.

5. A solid ceramic product isostatic mold as claimed in claim 4, wherein said sealing layer is of a thin film construction.

6. A solid ceramic product cold isostatic pressing mould as claimed in claim 4, wherein said sealing layer is a plastic film layer.

7. A solid ceramic product cold isostatic pressing mould as claimed in any one of claims 1 to 6, wherein a fixing layer is provided between said upper mould cover and the mould housing, and a fixing layer is provided between said lower mould cover and the mould housing.

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