Composite isostatic pressing ceramic mold

Abstract

The composite isostatic pressing ceramic mold comprises a base plate provided with a containing cavity, an isostatic pressing assembly is arranged in the containing cavity, and the isostatic pressing assembly is composed of an elastic face rubber layer, an elastic bottom rubber layer and a metal plate; the metal mold core plate is detachably stacked and fixed on the base plate, and a ceramic tile forming rubber surface is further arranged on one end surface, far away from the base plate, of the metal mold core plate. According to the invention, the phenomenon of bottom penetration of produced tiles can be avoided, the yield of the tiles is obviously improved, and the ceramic tile molding rubber surface and the elastic surface rubber layer are separated through the metal mold core plate, so that leakage of hydraulic oil can be effectively blocked, the hydraulic oil is prevented from directly flowing to the ceramic tile molding rubber surface, and the hydraulic oil is prevented from polluting tile blank powder; and the production requirements of ceramic tiles of different models and specifications can be quickly met by replacing the corresponding metal mold core plates, the whole set of mold does not need to be customized again, the manufacturing cost of the mold can be greatly reduced, and the warehouse management cost can be reduced.

Description

Technical Field

[0001] This invention relates to the field of mold technology for ceramic tile production, and in particular to an isostatic pressing ceramic mold. Background Technology

[0002] Isostatic pressing molds are the core components of isostatic pressing molding processes. Their core function is to support the powder to be formed (such as brick powder) and, under high pressure, transmit the uniform pressure of the fluid medium to the powder through the elastic mold body, so that the powder is compacted and formed, and finally obtains a ceramic tile blank with uniform density and stable structure.

[0003] In existing isostatic pressing mold solutions, such as the patent technology in Chinese patent application number 202022144586.2 entitled "An Isostatic Pressing Mold Core," it mainly consists of a mold core base, a first rubber plate, a second rubber plate, and a third rubber plate. The upper surface of the first rubber plate is provided with a mesh oil groove for accommodating hydraulic oil, and the oil inlet channel on the mold core base is connected to the mesh oil groove. During use, the hydraulic oil is evenly diffused into the first and second rubber plates, and the oil pressure is transmitted through the second rubber plate to the third rubber plate, ensuring a stable oil pressure in each rubber plate and overcoming the problem of uneven oil pressure in ordinary isostatic pressing molds. While this type of solution can meet basic molding requirements, it still has the following shortcomings in actual production: First, the phenomenon of "through-the-bottom" is common. Because each layer of rubber sheet is an elastic structure, during the pressing process, the textures or structures on the mold core substrate, the first layer of rubber sheet, and the second layer of rubber sheet can easily be transferred to the surface of the brick blank through the third layer of rubber sheet. This results in the formed brick blank surface having textures or structures consistent with the internal textures or structures of the mold core. This defect directly damages the flatness and aesthetics of the brick surface, making it impossible for the finished bricks after subsequent firing to meet appearance quality standards, significantly reducing the product qualification rate.

[0004] Secondly, rubber sheets are prone to oil leakage. Existing rubber sheets are typically made of rubber or polyurethane, and under prolonged use under high pressure and cyclic loads, the rubber layer is prone to aging or micro-cracks, leading to leakage of the pressure transmission medium (hydraulic oil). The leaked oil seeps into the brick powder, not only damaging the powder's molding properties, resulting in uneven density and insufficient strength in the pressed bricks, but also making it impossible to recycle and repress the contaminated powder, forcing it to be completely scrapped. This significantly increases raw material loss and brick-making costs, reducing production efficiency.

[0005] Third, the molds suffer from poor versatility and high overall costs. Existing isostatic pressing molds are mostly one-piece, non-removable structures with fixed dimensions and shapes for their third rubber layer. When producing different types and specifications of tiles, it's impossible to adapt the mold's local structure to meet production needs; a completely new mold must be custom-made. This not only leads to high manufacturing costs but also results in large, one-piece molds that require significant storage space when idle, increasing storage and management costs. Furthermore, the cumbersome mold replacement and debugging process prolongs production preparation cycles, reduces production efficiency, and further restricts the company's need for large-scale, multi-category production.

[0006] Therefore, given the aforementioned problems with existing isostatic pressing molds, the applicant believes it is essential to develop an isostatic pressing mold structure that can solve these problems, improve product quality, reduce production costs, and be compatible with the production of various ceramic tile models and specifications. Summary of the Invention

[0007] The purpose of this invention is to solve the above-mentioned problems and shortcomings by providing a composite isostatic pressing ceramic mold. This composite isostatic pressing ceramic mold can prevent the phenomenon of the bottom of the produced ceramic tile from showing through, significantly improving the yield rate of ceramic tiles. Furthermore, by separating the ceramic tile forming adhesive surface from the elastic adhesive layer through the metal mold core plate, it can effectively block the leakage of hydraulic oil, prevent hydraulic oil from flowing directly onto the ceramic tile forming adhesive surface, and prevent hydraulic oil from contaminating the ceramic tile powder. Moreover, by replacing the corresponding metal mold core plate, it can quickly adapt to the production needs of different models and specifications of ceramic tiles without the need to re-customize the entire mold. This not only greatly reduces the manufacturing cost of the mold but also reduces the warehousing management cost.

[0008] The technical solution of this invention is implemented as follows: A composite isostatic pressing ceramic mold, characterized in that it includes a pad with a receiving cavity, wherein an isostatic pressing component is provided in the receiving cavity, the isostatic pressing component is composed of an elastic surface adhesive layer and an elastic bottom adhesive layer stacked and sealed together at their four edges, and a metal plate wrapped between the elastic surface adhesive layer and the elastic bottom adhesive layer, the metal plate having a plurality of through holes arranged at equal intervals, and adhesive columns connecting the elastic surface adhesive layer and the elastic bottom adhesive layer passing through the through holes, and oil passage chambers interconnected between the through holes and the adhesive columns, between the metal plate and the elastic surface adhesive layer, and between the metal plate and the elastic bottom adhesive layer, the pad also having oil inlet and outlet holes communicating with the oil passage chambers; a metal mold core plate detachably stacked and fixed on the pad, the metal mold core plate covering the receiving cavity and in contact with the elastic surface adhesive layer, and a ceramic tile forming adhesive surface being provided on the end face of the metal mold core plate away from the pad.

[0009] Preferably, the metal core plate and the pad are further provided with matching positioning pins and positioning holes.

[0010] Preferably, the cavity wall of the receiving cavity is further provided with a limiting protrusion, and the elastic surface adhesive layer, the elastic bottom adhesive layer and the metal plate are all provided with limiting grooves that cooperate with the limiting protrusion; the positioning pin or positioning hole is provided on the limiting protrusion.

[0011] Preferably, the front and rear walls and the left and right walls of the receiving cavity are provided with limiting protrusions. The two limiting protrusions on the front and rear walls of the receiving cavity are arranged diagonally staggered, and the two limiting protrusions on the left and right walls of the receiving cavity are arranged diagonally staggered.

[0012] Preferably, the bottom of the receiving cavity is further provided with a positioning protrusion, and the elastic surface adhesive layer, the elastic bottom adhesive layer and the metal plate are all provided with corresponding through holes that cooperate with the positioning protrusion.

[0013] Preferably, the outer end face of the positioning protrusion is in contact with the metal core plate.

[0014] Preferably, the elastic surface adhesive layer is further provided with a nested anti-detachment limiting protrusion and an anti-detachment limiting groove between the through hole and the positioning protrusion; or the elastic bottom adhesive layer is further provided with a nested anti-detachment limiting protrusion and an anti-detachment limiting groove between the through hole and the positioning protrusion.

[0015] Preferably, the present invention further includes a locking screw, wherein the metal core plate is provided with a threaded hole, the pad plate is provided with a through hole extending to the outer end face of the positioning protrusion, and one end of the locking screw passes through the through hole and is screwed onto the threaded hole.

[0016] Preferably, the metal plate has a serrated edge structure.

[0017] Preferably, the oil inlet and outlet holes are composed of interconnected transverse and longitudinal holes arranged in a T-shape. The inner end of the longitudinal hole is connected to the oil passage chamber, the outer end of the longitudinal hole is provided with a sealing plug, and the outer end of the transverse hole is provided with a one-way valve.

[0018] The beneficial effects of this invention are: This invention features a detachable and assembleable base plate and metal core plate, with the tile forming adhesive surface positioned on the metal core plate. When producing ceramic tiles of different models or specifications, the corresponding metal core plate can be replaced to quickly adapt to the production needs of different tile models and specifications, eliminating the need to customize the entire mold. This significantly reduces mold manufacturing costs. Furthermore, the disassembled metal core plate, being a component of the complete mold set, is smaller in size, greatly reducing storage space requirements when not in use and lowering warehousing management costs. Simultaneously, the mold replacement and debugging process is simpler, shortening the production preparation cycle, improving production efficiency, and adapting to the large-scale, multi-category production needs of enterprises.

[0019] Furthermore, by setting a metal core plate, the present invention separates the tile forming adhesive surface from the elastic adhesive layer. Its rigid structure effectively blocks the transmission of internal patterns or internal structures of the receiving cavity and isostatic pressing components to the tile surface, fundamentally eliminating the problem of corresponding patterns forming on the tile surface, preventing the bottom from showing through, and ensuring the flatness and aesthetics of the tile surface. This allows the finished tiles to consistently meet appearance quality standards, significantly reducing the product defect rate and improving production stability and product competitiveness.

[0020] Meanwhile, by setting the metal mold core plate in contact with the elastic adhesive layer, when the oil chamber is filled with hydraulic oil to press the powder of the brick blank, this not only prevents the bottom from being exposed, but also ensures that the ceramic mold has a very good uniform pressure transmission effect, so as to achieve a very good isostatic pressing effect, thereby ensuring that the produced ceramic tile has a better brick shape and a uniform density.

[0021] Meanwhile, by using a metal mold core plate to shield and cover the cavity, the elastic surface adhesive layer and the elastic base adhesive layer are less likely to come into contact with external air or other powder impurities. This improves the anti-aging properties of the elastic surface adhesive layer and the elastic base adhesive layer, extends their service life, and slows down the rate of oil seepage. Furthermore, by separating the tile forming adhesive surface from the elastic surface adhesive layer using the metal mold core plate, hydraulic oil leakage is effectively blocked, preventing hydraulic oil from flowing directly onto the tile forming adhesive surface. This not only avoids hydraulic oil contamination of the tile blank powder, ensuring that the powder maintains its original forming properties and guaranteeing the density uniformity and structural strength of the pressed tile blank, but also reduces scrap caused by powder contamination, allowing the powder to be recycled and reused, thus reducing raw material loss.

[0022] Furthermore, by forming interconnected oil passage chambers between the through holes and the rubber column, between the metal plate and the elastic surface rubber layer, and between the metal plate and the elastic bottom rubber layer, the oil passage chambers formed in this way can cover a larger area of ​​hydraulic oil, thereby achieving a better pressure equalization effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a schematic diagram showing the disassembled structure of the metal core plate and the pad plate of the present invention.

[0025] Figure 3 This is a three-dimensional structural diagram of the metal core plate of the present invention.

[0026] Figure 4 This is a schematic diagram showing the disassembled structure of the isostatic pressing component and the pad of the present invention.

[0027] Figure 5 For the present invention Figure 1 A schematic diagram of the cross-sectional structure of AA.

[0028] Figure 6 This is a schematic diagram showing the disassembled structure of the isostatic pressing component and the pad with a cross-section according to the present invention.

[0029] Figure 7 This is a three-dimensional structural diagram of the metal plate of the present invention. Detailed Implementation

[0030] The composite isostatic pressing ceramic mold described in this invention, such as... Figure 3 As shown, it includes a pad 1 with a receiving cavity 10, and the receiving cavity 10 is equipped with an isostatic pressure assembly 2, such as... Figure 6 As shown, the isostatic pressure assembly 2 consists of an elastic surface adhesive layer 21 and an elastic base adhesive layer 22 stacked together and sealed at their edges, and a metal plate 23 encased between the elastic surface adhesive layer 21 and the elastic base adhesive layer 22. The metal plate 23 has several equally spaced through holes 231, through which adhesive columns 24 connecting the elastic surface adhesive layer 21 and the elastic base adhesive layer 22 are inserted. Interconnected oil passage chambers 25 are formed between the through holes 231 and the adhesive columns 24, between the metal plate 23 and the elastic surface adhesive layer 21, and between the metal plate 23 and the elastic base adhesive layer 22. The pad 1 also has oil inlet / outlet holes 11 communicating with the oil passage chambers 25. Figure 1 and Figure 2 As shown, a detachable metal core plate 3 is stacked and fixed on the pad 1. The metal core plate 3 covers the receiving cavity 10 and is in contact with the elastic surface adhesive layer 21. A tile forming adhesive surface 4 is also provided on the end face of the metal core plate 3 away from the pad 1. By setting the metal plate 23, the present invention can act as a skeleton between the elastic surface adhesive layer 21 and the elastic bottom adhesive layer 22, preventing the elastic surface adhesive layer 21 and the elastic bottom adhesive layer 22 from shifting arbitrarily, thus ensuring balanced pressure during tile pressing and improving reliability. By setting the adhesive column 24, the present invention can limit the arbitrary displacement of the metal plate 23 between the elastic surface adhesive layer 21 and the elastic bottom adhesive layer 22.

[0031] To facilitate the assembly and alignment of the metal core plate 3 and the pad plate 1, such as... Figure 3 and Figure 4 As shown, a positioning pin 12 and a positioning hole 31 are also provided between the metal core plate 3 and the pad plate 1. By providing the positioning pin 12 and the positioning hole 31, assembly and positioning are facilitated, making the assembly of the metal core plate 3 and the pad plate 1 more convenient and faster. Specifically, the positioning pin 12 is provided on the pad plate 1, and the positioning hole 31 is provided on the metal core plate 3. Of course, the positions of the positioning pin 12 and the positioning hole 31 can also be interchanged, that is, the positioning pin 12 is provided on the metal core plate 3, and the positioning hole 31 is provided on the pad plate 1, which also achieves the purpose of facilitating assembly and positioning.

[0032] In order to achieve the purpose of limiting the isostatic pressure component 2, such as Figure 4 As shown, the cavity wall of the receiving cavity 10 is also provided with a limiting protrusion 13. The elastic surface adhesive layer 21, the elastic bottom adhesive layer 22, and the metal plate 23 are all correspondingly provided with limiting grooves 26 that cooperate with the limiting protrusion 13. The positioning pin 12 or positioning hole 31 is provided on the limiting protrusion 13. This can prevent the isostatic pressing component 2 from shifting randomly in the receiving cavity 10, so as to ensure the pressure balance effect when pressing bricks and improve the reliability of use. Since the metal plate 23 is wrapped between the elastic surface adhesive layer 21 and the elastic bottom adhesive layer 22, the surface area of ​​the metal plate 23 is smaller than the surface area of ​​the elastic surface adhesive layer 21 and the surface area of ​​the elastic bottom adhesive layer 22. In order to cooperate with the clamping assembly of the limiting protrusion 13, the radial cross-sectional dimension of the limiting groove 26 of the metal plate 23 is larger than the radial cross-sectional dimension of the limiting groove 26 of the elastic surface adhesive layer 21 and the elastic bottom adhesive layer 22. This ensures that the limiting grooves 26 of all three components are fitted onto the limiting protrusion 13 without affecting the sealing of the oil passage chamber 25. Preferably, the positioning pin 12 is located on the limiting protrusion 13. In actual manufacturing, the limiting protrusion 13 is provided with a positioning insertion hole 131, one end of the positioning pin 12 is inserted into the positioning insertion hole 131, and then the positioning pin 12 is fixed to the positioning insertion hole 131 by welding.

[0033] In order to further improve the limiting effect of the isostatic pressure component 2, such as Figure 4 As shown, the front and rear walls and left and right walls of the receiving cavity 10 are all provided with limiting protrusions 13. The two limiting protrusions 13 on the front and rear walls of the receiving cavity 10 are diagonally staggered, and the two limiting protrusions 13 on the left and right walls of the receiving cavity 10 are also diagonally staggered. This diagonal staggered arrangement can restrict the horizontal translation of the isostatic pressing assembly 2 and also restrict the circumferential rotation of the isostatic pressing assembly 2, so as to form an anti-rotation torque. This ensures that the isostatic pressing assembly 2 can only move towards or away from the metal mold core plate 3 when filling and unfilling oil, thus ensuring the pressure balance effect during brick pressing and improving the reliability of use.

[0034] In order to further improve the limiting effect of the isostatic pressure component 2, such as Figure 4 and Figure 6As shown, the bottom of the receiving cavity 10 is also provided with a positioning protrusion 14. The elastic surface adhesive layer 21, the elastic bottom adhesive layer 22, and the metal plate 23 are all correspondingly provided with through holes 27 that cooperate with the positioning protrusion 14. This can further restrict the isostatic pressing assembly 2 from moving in other directions, so as to ensure that the isostatic pressing assembly 2 can only move towards or away from the metal mold core plate 3 when filling and unfilling oil, thus ensuring the pressure balance effect during brick pressing and improving the reliability of use. In order to cooperate with the positioning protrusion 14, the radial cross-sectional dimension of the through hole 27 of the metal plate 23 is larger than the radial cross-sectional dimension of the through holes 27 of the elastic surface adhesive layer 21 and the elastic bottom adhesive layer 22. This ensures that the through holes 27 of all three are fitted on the positioning protrusion 14 without affecting the sealing of the oil passage chamber 25.

[0035] In order to improve the support force on the positioning protrusion 14, such as Figure 5 As shown, the outer end face of the positioning protrusion 14 contacts the metal mold core plate 3. This prevents the metal mold core plate 3 from denting and deforming due to lack of support during brick pressing, thus improving its service life. In practical applications, multiple positioning protrusions 14 are used, arranged at equal intervals, resulting in better support strength.

[0036] To prevent the isostatic pressure assembly 2 from detaching from the receiving cavity 10, such as Figure 5 and Figure 6 As shown, the elastic adhesive layer 21 is further provided with a nested anti-detachment limiting protrusion ring 271 and an anti-detachment limiting groove 141 between the through hole 27 and the positioning protrusion 14. Specifically, the anti-detachment limiting protrusion ring 271 is disposed on the through hole 27 of the elastic adhesive layer 21, and the anti-detachment limiting groove 141 is disposed on the positioning protrusion 14; of course, the positions of the anti-detachment limiting protrusion ring 271 and the anti-detachment limiting groove 141 can also be interchanged, that is, the anti-detachment limiting protrusion ring 271 is disposed on the positioning protrusion 14, and the anti-detachment limiting groove 141 is disposed on the through hole 27 of the elastic adhesive layer 21. This can also achieve the purpose of preventing the isostatic pressing assembly 2 from detaching from the receiving cavity 10.

[0037] Alternatively, the elastic base layer 22 may also be provided with a nested anti-detachment limiting protrusion ring 271 and an anti-detachment limiting groove 141 between the through hole 27 and the positioning protrusion 14. Specifically, the anti-detachment limiting protrusion ring 271 is disposed on the through hole 27 of the elastic base layer 22, and the anti-detachment limiting groove 141 is disposed on the positioning protrusion 14; of course, the positions of the anti-detachment limiting protrusion ring 271 and the anti-detachment limiting groove 141 can also be interchanged, that is, the anti-detachment limiting protrusion ring 271 is disposed on the positioning protrusion 14, and the anti-detachment limiting groove 141 is disposed on the through hole 27 of the elastic base layer 22. This can also achieve the purpose of preventing the isostatic pressing assembly 2 from detaching from the receiving cavity 10.

[0038] To further improve the detachable structure of the metal core plate 3 and the pad plate 1, such as Figure 2 and Figure 5 As shown, the present invention also includes a locking screw 5. The metal core plate 3 has a threaded hole 32, and the pad 1 has a through hole 142 extending to the outer end face of the positioning protrusion 14. One end of the locking screw 5 passes through the through hole 142 and is screwed into the threaded hole 32. This allows for a simple, secure, and easy disassembly assembly of the metal core plate 3 and the pad 1. In practical applications, a nesting groove can be provided on the metal core plate 3, and a nesting protrusion can be provided on the pad 1. The nesting protrusion can then be locked in the nesting groove from the side of the metal core plate 3 using a locking pin. This also achieves the purpose of detachable assembly of the metal core plate 3 and the pad 1. Of course, other existing detachable structures can also be used to detachably assemble the metal core plate 3 and the pad 1. Preferably, the present invention preferably adopts the above-mentioned screw locking scheme, which not only makes reasonable use of the internal space of the support column to accommodate the locking screw 5, but also does not affect the operation of the isostatic pressing assembly 2, thus ensuring the reliability of use.

[0039] To further prevent the metal plate 23 from shifting arbitrarily between the elastic surface adhesive layer 21 and the elastic base adhesive layer 22, such as Figure 7 As shown, the metal plate 23 has a serrated edge structure. This structural design increases the adhesion between the elastic top adhesive layer 21 and the elastic bottom adhesive layer 22, thereby improving the connection strength between them. In practical applications, the serrated edge structure of the metal plate 23 can be obtained by cutting the metal plate 23, with the cut edges passing through multiple through holes 231. The incomplete through holes 231 formed after cutting thus constitute the serrated structure.

[0040] To further improve the structure of the oil inlet / outlet hole 11, such as Figure 5 As shown, the oil inlet / outlet port 11 is composed of a transverse passage 111 and a longitudinal passage 112 arranged in a T-shape and connected together. The inner end of the longitudinal passage 112 is connected to the oil passage chamber 25, and the outer end of the longitudinal passage 112 is provided with a sealing plug 6. The outer end of the transverse passage 111 is provided with a one-way valve 7. In actual production, the transverse passage 111 is the hydraulic oil input end of the oil inlet / outlet port 11. In a CNC machining environment, the longitudinal passage 112 is first opened and connected to the oil passage chamber 25, and then the transverse passage 111 is opened and connected to the longitudinal passage 112. In specific use, the sealing plug 6 seals the outer end of the longitudinal passage 112, thus preventing hydraulic oil from leaking from the outer end of the longitudinal passage 112 during filling. By setting a one-way valve 7 at the outer end of the transverse passage 111, oil overflow from the outer end of the transverse passage 111 after it is filled with oil. In practical applications, such as... Figure 5 and Figure 6 As shown, the elastic base layer 22 is also provided with a connecting hole 221 that penetrates into the oil passage 25 and is connected to the longitudinal hole 112. In order to improve the sealing of the connection and prevent oil leakage, an oil seal 220 is provided at the joint between the connecting hole 221 and the longitudinal hole 112. This sealing structure is a known prior art. For reference, please refer to the patent document with Chinese patent application number 201920406170.8 entitled "An Isostatic Pressure Ceramic Tile Mold Core". The patent document describes in detail the specific structure and sealing principle of the oil seal 220, which will not be elaborated here.

[0041] In the actual production and manufacturing of the elastic surface adhesive layer 21 and the elastic bottom adhesive layer 22, the metal plate 23 is first locked with screws or welded with support rods to make the metal plate 23 suspended in the receiving cavity 10. Then, adhesive is injected into the receiving cavity 10 to form the elastic bottom adhesive layer 22 between the metal plate 23 and the bottom of the receiving cavity 10, adhesive columns 24 are formed in the through hole 231 of the metal plate 23, and the elastic surface adhesive layer 21 is formed on top of the metal plate 23. After the adhesive is injected and cooled, under the condition of thermal expansion and contraction, oil passage chambers 25 are formed between the through hole 231 and the adhesive column 24, between the metal plate 23 and the elastic surface adhesive layer 21, and between the metal plate 23 and the elastic bottom adhesive layer 22.

[0042] In practical applications, the periphery of the elastic adhesive layer 21 is also arranged to cover the edge of the cavity opening of the receiving cavity 10, which can increase the connection between the isostatic pressure component 2 and the receiving cavity 10, and also improve the sealing between the isostatic pressure component 2 and the receiving cavity 10.

[0043] In practical applications, when the tile forming adhesive surface 4 is used to press out the front of the tile, the tile forming cavity provided on the tile forming adhesive surface 4 is a smooth concave surface. When the tile forming adhesive surface 4 is used to press out the back of the tile, the tile forming cavity provided on the tile forming adhesive surface 4 is a concave surface with a textured surface.

[0044] In practical applications, the pad 1 and the metal core plate 3 are also provided with lifting holes on their four sides to facilitate the lifting and moving of the pad 1 and the metal core plate 3, as well as the lifting and moving of the entire composite isostatic ceramic mold.

Claims

1. A composite isostatic pressing ceramic mold, characterized in that: include A pad (1) with a receiving cavity (10) is provided in the receiving cavity (10), and an isostatic pressing assembly (2) is provided in the receiving cavity (10). The isostatic pressing assembly (2) is composed of an elastic surface adhesive layer (21) and an elastic base adhesive layer (22) stacked together and sealed together at their four edges, and a metal plate (23) wrapped between the elastic surface adhesive layer (21) and the elastic base adhesive layer (22). The metal plate (23) is provided with a plurality of through holes (231) arranged at equal intervals. A rubber column (24) is inserted through the through hole (231) to connect the elastic surface adhesive layer (21) and the elastic bottom adhesive layer (22). An oil passage chamber (25) is formed between the through hole (231) and the rubber column (24), between the metal plate (23) and the elastic surface adhesive layer (21), and between the metal plate (23) and the elastic bottom adhesive layer (22). An oil inlet and outlet hole (11) is also provided on the pad (1) to communicate with the oil passage chamber (25). A metal core plate (3) is detachably stacked and fixed on the pad (1), and the metal core plate (3) covers the receiving cavity (10) and is in contact with the elastic adhesive layer (21). The end face of the metal core plate (3) away from the pad (1) is also provided with a ceramic tile forming adhesive surface (4).

2. The composite isostatic pressing ceramic mold according to claim 1, characterized in that: The metal core plate (3) and the pad plate (1) are also provided with a matching positioning pin (12) and positioning hole (31).

3. The composite isostatic pressing ceramic mold according to claim 2, characterized in that: The cavity wall of the receiving cavity (10) is also provided with a limiting protrusion (13), and the elastic surface adhesive layer (21), the elastic bottom adhesive layer (22) and the metal plate (23) are all provided with limiting grooves (26) that cooperate with the limiting protrusion (13); the positioning pin (12) or positioning hole (31) is provided on the limiting protrusion (13).

4. The composite isostatic pressing ceramic mold according to claim 3, characterized in that: The front and rear walls and the left and right walls of the receiving cavity (10) are provided with limiting protrusions (13). The two limiting protrusions (13) on the front and rear walls of the receiving cavity (10) are arranged diagonally staggered, and the two limiting protrusions (13) on the left and right walls of the receiving cavity (10) are arranged diagonally staggered.

5. The composite isostatic pressing ceramic mold according to claim 1, characterized in that: The bottom of the cavity (10) is also provided with a positioning protrusion (14), and the elastic surface adhesive layer (21), the elastic bottom adhesive layer (22) and the metal plate (23) are all provided with through holes (27) that cooperate with the positioning protrusion (14).

6. The composite isostatic pressing ceramic mold according to claim 5, characterized in that: The outer end face of the positioning protrusion (14) is in contact with the metal core plate (3).

7. The composite isostatic pressing ceramic mold according to claim 5, characterized in that: The elastic surface adhesive layer (21) is further provided with a nested anti-detachment limiting protrusion (271) and an anti-detachment limiting ring groove (141) between the through hole (27) and the positioning protrusion (14); or the elastic bottom adhesive layer (22) is further provided with a nested anti-detachment limiting protrusion (271) and an anti-detachment limiting ring groove (141) between the through hole (27) and the positioning protrusion (14).

8. The composite isostatic pressing ceramic mold according to claim 5, characterized in that: It also includes a locking screw (5), the metal core plate (3) is provided with a threaded hole (32), the pad plate (1) is provided with a through hole (142) that extends to the outer end face of the positioning protrusion (14), and one end of the locking screw (5) passes through the through hole (142) and is screwed into the threaded hole (32).

9. The composite isostatic pressing ceramic mold according to claim 1, characterized in that: The metal plate (23) has a serrated edge structure around its perimeter.

10. The composite isostatic pressing ceramic mold according to claim 1, characterized in that: The oil inlet / outlet port (11) is composed of a transverse channel (111) and a longitudinal channel (112) that are connected together and arranged in a T-shape. The inner end of the longitudinal channel (112) is connected to the oil passage chamber (25). The outer end of the longitudinal channel (112) is provided with a sealing plug (6), and the outer end of the transverse channel (111) is provided with a one-way valve (7).

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