Complex curved surface forming die and ceramic complex curved surface forming system

Abstract

The utility model discloses a complex curved surface forming mold and a ceramic complex curved surface forming system, and the mold is used for preparing a complex curved surface ceramic part and comprises a first mold and a second mold matched with the first mold; the first mold comprises a first base, a first pressure head made of a porous material, a first breather pipe communicated with the first pressure head and a first sealing element; one side of the first pressing head is fixedly connected with the first base, the opposite side of the first pressing head is a shaping surface used for making contact with ceramic pug, and the side face of the first pressing head is in sealed connection with the first sealing piece; the second die comprises a second base, a second pressure head made of a porous material, a second breather pipe communicated with the second pressure head and a second sealing element; one side of the second pressing head is fixedly connected with the second base, the opposite side of the second pressing head is a matching surface used for being matched with the shaping surface, and the side face of the first pressing head is in sealing connection with the first sealing piece; the first ventilation pipe and the second ventilation pipe are used for being communicated with an air pressure adjusting device so as to selectively adjust the output air pressure of the shaping face and the matching face.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic material preparation and forming, in particular to a complex curved surface forming die and a ceramic complex curved surface forming system, and particularly to a complex curved surface forming die used in the semi-wet plastic forming process. Background Art

[0002] Ceramic materials have the advantages of high hardness, wear resistance, corrosion resistance, etc., and are applied in multiple industries. Also due to the above advantages, it is difficult to process and form ceramic materials. Therefore, the near-net size forming technology for complex structures including complex curved surfaces is an important development direction for ceramic materials. The forming of traditional ceramic components including curved surfaces or even hyperbolic surfaces can adopt processes such as casting forming and dry pressing forming. The former has low efficiency and the latter is prone to cause non-uniformity inside the ceramic. Therefore, the use of the semi-wet plastic forming process to prepare complex curved surface ceramic components has good application prospects.

[0003] However, when preparing complex curved surface ceramic components from ceramic mud through the semi-wet plastic forming process, the existing complex curved surface forming dies are mainly prepared by ordinary steel die sleeves. However, since the ceramic mud contains binders such as resin and cellulose, the surface of the formed ceramic blank is closely attached to the die surface under the action of atmospheric pressure. Direct demolding will cause the blank to deform and the surface of the blank to be damaged. After extrusion by an ordinary steel die sleeve, they are easily adhered together, resulting in poor demolding effect.

[0004] Therefore, the existing technology urgently needs to be improved. Summary of the Utility Model

[0005] In view of the shortcomings of the existing technology, the purpose of the present utility model is to provide a complex curved surface forming die and a ceramic complex curved surface forming system to at least solve the problem of poor demolding effect when preparing complex curved surface ceramic components from existing ceramic mud through the semi-wet plastic forming process.

[0006] To achieve the above object, a first aspect of the present utility model provides a complex surface forming die for preparing complex surface ceramic components from ceramic clay, comprising a first die and a second die that matches the first die; the first die includes a first base, a first punch made of porous material, a first air pipe communicating with the first punch, and a first seal; one side of the first punch is fixedly connected to the first base, and the opposite side is a shaping surface for contacting the ceramic clay, and the side surface of the first punch is hermetically connected to the first seal for guiding the gas in the first air pipe to the shaping surface; the second die includes a second base, a second punch made of porous material, a second air pipe communicating with the second punch, and a second seal; one side of the second punch is fixedly connected to the second base, and the opposite side is a matching surface for matching with the shaping surface, and the side surface of the first punch is hermetically connected to the first seal for guiding the gas in the second air pipe to the matching surface; wherein the first air pipe and the second air pipe are used to communicate with a pneumatic regulating device to selectively regulate the output air pressure of the shaping surface and the matching surface.

[0007] As an implementation manner of the present utility model, the first base and the first punch are integrally provided, the first punch is made of porous die steel, and one side of the first base away from the first punch is communicated with the first air pipe; optionally, the second base and the second punch are integrally provided, the second punch is made of porous die steel, and one side of the second base away from the second punch is communicated with the second air pipe.

[0008] As an implementation manner of the present utility model, the first base and the first punch are separately fixed, the first base and the first punch are connected by bolts, tenon and mortise connection, snap connection, or epoxy resin connection, and the first base is made of dense material; or, the second base and the second punch are separately fixed, the second base and the second punch are connected by bolts, tenon and mortise connection, snap connection, or epoxy resin connection, and the second base is made of dense material.

[0009] As an implementation manner of the present utility model, a plurality of air flow pipes are provided on one side of the first base close to the first punch, and the plurality of air flow pipes are respectively communicated with the first air pipe and the first punch; or, a plurality of air flow pipes are provided on one side of the second base close to the second punch, and the plurality of air flow pipes are respectively communicated with the second air pipe and the second punch.

[0010] As an implementation manner of the present utility model, the shaping surface is a plane, a spherical surface, a parabolic surface or a free surface.

[0011] As an implementation manner of the present utility model, the porous material is one of porous metal, porous graphite, porous ceramic or porous plastic; alternatively, the first seal and / or the second seal is a colloid, glue or elastic seal.

[0012] As an implementation manner of the present utility model, the pore diameter of the porous material is 1-100 micrometers.

[0013] In the second aspect of the present utility model, there is provided a ceramic complex surface forming system for preparing a complex surface ceramic component by a semi-wet shaping process using ceramic clay, including a press, a pneumatic pressure regulating device, a controller and the complex surface forming die described in the first aspect of the present utility model. The press is fixedly connected to the first base and the second base of the complex surface forming die respectively, and the connection positions of the press with the first base and / or the second base are arranged on the side far from the ceramic clay; wherein the controller is electrically connected to the press and the pneumatic pressure regulating device, and the controller is used to control the pneumatic pressure regulating device to output a set air pressure according to the state of the ceramic clay, and control the press to selectively drive the first die and / or the second die to move along a set direction.

[0014] As an implementation manner of the present utility model, the controller is set such that when the ceramic clay is in the plastic forming state, the controller controls the pneumatic pressure regulating device to close so that the output air pressures of the plastic forming surface and the matching surface are consistent with the ambient air pressure; when the ceramic clay is in the demolding state, the controller controls the pneumatic pressure regulating device to output a set positive air pressure to both the plastic forming surface and the matching surface; when the ceramic clay is in the transportation state, the controller controls the pneumatic pressure regulating device to output a set negative air pressure to the plastic forming surface and / or the matching surface.

[0015] As an implementation manner of the present utility model, the set positive air pressure is 0.1 Mpa - 0.2 Mpa, and the set negative air pressure is -0.1 Mpa; alternatively, the diameter of the porous material is 5-50 micrometers.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] By setting the first punch 130 and the second punch 230 as porous materials and connecting them to the pneumatic pressure regulating device 310 through the first air pipe 120 and the second air pipe 220 respectively, the separation of the first die 100 / second die 200 and the ceramic clay can be well realized, and it has the advantages of fast demolding speed after the ceramic clay is pressed and formed and good surface topography of the ceramic formed blank. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a complex curved surface forming mold provided by an embodiment of the present utility model;

[0020] Figure 2 It is a connection schematic diagram of a ceramic complex curved surface forming system provided by an embodiment of the present utility model.

[0021] Explanation of reference numerals:

[0022] 100, the first mold; 110, the first base; 111, the air flow pipeline; 120, the first ventilation pipe; 130, the first press head; 131, the shaping surface; 140, the first seal;

[0023] 200, the second mold; 210, the second base; 220, the second ventilation pipe; 230, the second press head; 231, the matching surface; 240, the second seal;

[0024] 310, the air pressure regulating device; 320, the press; 330, the controller. Specific embodiments

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper", "lower", "left", "right", "front", and "rear" usually refer to the upper, lower, left, and right in the actual use or working state of the device, specifically the drawing direction in the drawings.

[0026] It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present utility model. And in the following embodiments, each embodiment is described with its own emphasis. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0027] Please refer to Figure 1-2, A complex surface forming die is shown in the figure, which is used in the forming process and transfer process steps of preparing complex surface ceramic components from ceramic clay, especially suitable for the process of preparing complex surface ceramic components by semi-wet plastic forming process. The complex surface forming die includes a first die 100 and a second die 200 that cooperates with the first die 100. In Figure 1 In this specific embodiment, the first die 100 is the upper die and the second die 200 is the lower die.

[0028] The first die 100 includes a first base 110, a first ventilation pipe 120, a first punch 130 and a first seal 140. The first base 110 and the first punch 130 are fixedly connected. The first ventilation pipe 120 is communicated with the first punch 130. The first punch 130 is made of porous material. The surface of the first punch 130 facing the second die 200 is a plastic surface, and the plastic surface is set as a complex surface. The complex surface can preferably be a spherical surface, a parabolic surface and a free surface. Of course, it can also naturally be a plane.

[0029] One side of the first punch 130 is fixedly arranged with the first base 110, and the opposite side is defined as the plastic surface 131. The fixed surface of the first punch 130 and the first base 110 is arranged opposite to the plastic surface 131 of the first punch 130. The plastic surface 131 is used to contact the ceramic clay.

[0030] The surface connecting the plastic surface 131 and the fixed surface of the first punch 130 and the first base 110 in the first punch 130 is defined as the side surface. In Figure 1 In this specific embodiment, the first die 100 and the second die 200 are arranged in the up-down direction. The fixed surface of the first punch 130 and the first base 110 is the top surface of the first punch 130. The plastic surface 131 of the first punch 130 is the bottom surface of the first punch 130. The surface used to connect the top surface and the bottom surface of the first punch 130 in the first punch 130 is the side surface.

[0031] The first seal 140 is arranged on the side surface of the first punch 130 and is hermetically connected to the first punch 130 to prevent the gas in the first punch 130 from leaking along the side surface of the first punch 130, that is, to guide the gas of the first ventilation pipe to the plastic surface.

[0032] Similarly, the second die 200 includes a second base 210, a second ventilation pipe 220, a second punch 230 and a second seal 240. The second base 210 and the second punch 230 are fixedly connected. The second ventilation pipe 220 is communicated with the second punch 230. The second punch 230 is made of porous material. The surface of the second punch 230 facing the first die 100 is a matching surface 231, and the matching surface 231 is set to match the plastic surface 131 of the first punch 130.

[0033] One side of the second punch head 230 is fixedly arranged with the second base 210, and the opposite side is defined as the matching surface 231. The fixed surface of the second punch head 230 and the second base 210 is arranged opposite to the matching surface 231 of the second punch head 230. The matching surface 231 is used to contact the ceramic mud, and then the ceramic mud is prepared into a complex-curved surface ceramic part by cooperating with the shaping surface 131.

[0034] The surface connecting the matching surface 231 and the fixed surface of the second punch head 230 and the second base 210 in the second punch head 230 is uniformly defined as the side surface. Figure 1 In this specific embodiment, the first mold 100 and the second mold 200 are arranged in the up-and-down direction. The fixed surface of the second punch head 230 and the second base 210 is the bottom surface of the second punch head 230, the matching surface 231 of the second punch head 230 is the top surface of the second punch head 230, and the surface for connecting the top surface and the bottom surface of the second punch head 230 in the second punch head 230 is the side surface.

[0035] The second seal 240 is arranged on the side surface of the second punch head 230 and is hermetically connected to the second punch head 230 to prevent the gas in the second punch head 230 from leaking along the side surface of the second punch head 230, and is used to guide the gas of the second ventilation pipe to the matching surface.

[0036] The first ventilation pipe 120 and the second ventilation pipe 220 are respectively used to communicate with the air pressure regulating device 310, and the air pressure regulating device 310 is used to regulate the gas pressure.

[0037] When it is necessary to press the ceramic mud with the complex-curved surface forming mold mentioned in the present invention, the ceramic mud is placed on the shaping surface 131, and then the press 320 applies pressure to the first base 110 and the second base 210, so that the ceramic mud undergoes plastic deformation, and then the ceramic mud and the shaping surfaces 131 and the matching surfaces 231 of the upper and lower molds form a ceramic blank of the complex-curved surface forming mold.

[0038] Subsequently, the air pressure regulating device 310 inputs high-pressure gas into the first ventilation pipe 120 and the second ventilation pipe 220. The high-pressure gas will flow along the first ventilation pipe 120 / second ventilation pipe 220, the first punch head 130 / second punch head 230 until the shaping surface 131 / matching surface 231. Under the action of the high-pressure air, the ceramic blank is separated from the mold, and the demolding process is completed.

[0039] Therefore, through the solution of the present invention, by setting the first ventilation pipe 120, the second ventilation pipe 220, the first punch head 130 and the second punch head 230 made of porous materials, the separation of the ceramic blank and the mold can be well realized, and it is especially suitable for application in the process of preparing complex-curved surface ceramics by the semi-wet plastic forming process.

[0040] It can be understood that in the prior art, when preparing complex-curved surface ceramic components through a semi-wet plastic forming process, they are mainly prepared using a common steel mold sleeve. However, since the ceramic mud contains binders such as resin and cellulose, the surface of the formed ceramic green body is closely attached to the surface of the mold under the action of atmospheric pressure. Direct demolding will cause the green body to deform and the surface of the green body to be damaged. After extrusion through a common steel mold sleeve, they are prone to sticking together, resulting in poor demolding effect.

[0041] For the complex-curved surface forming mold provided by the present utility model, by setting the first punch 130 and the second punch 230 as porous materials and connecting them to the air pressure regulating device 310 through the first air pipe 120 and the second air pipe 220 respectively, it can well achieve the separation of the first mold 100 / second mold 200 and the ceramic mud, and has the advantages of fast demolding speed after the ceramic mud is pressed and formed and good surface topography of the formed ceramic green body.

[0042] Naturally, it can be understood that the complex-curved surface forming mold provided by the present utility model can be applied not only in the process of pressing and forming ceramic mud, but also in the transportation process of ceramic mud. In a specific application scenario, after the pressing of the ceramic mud is completed and separated from the first mold 100 and the second mold 200, by adjusting the gas pressure in either the first mold 100 or the second mold 200 to negative pressure, the ceramic mold can move relative to the first mold 100 / second mold 200 well, thereby facilitating its transportation to the target position.

[0043] It should be noted that for the first seal 140 and the second seal 240, as long as the side sealing of the first punch 130 and the second punch 230 can be achieved, there is no limitation on the specific sealing method. In a specific embodiment, the first seal 140 and the second seal 240 are colloid or glue, and the side sealing of the first punch 130 and the second punch 230 is achieved by coating the colloid / glue on the sides of the first punch 130 and the second punch 230. In another alternative embodiment, the first seal 140 and the second seal 240 are elastic seals, and the side sealing of the first punch 130 and the second punch 230 is achieved by abutting against the sides of the first punch 130 and the second punch 230 respectively.

[0044] It should also be noted that the present utility model does not limit the fixed connection method between the first / second punch 230 and the first base 110 / second base 210. In a specific embodiment, they are connected by means of bolt connection, mortise and tenon connection, snap connection, etc. In another specific embodiment, they are connected by bonding, and in this case, it is preferably fixed by epoxy resin bonding.

[0045] It should also be noted that for the first / second indenter 230 and the first base 110 / second base 210, they can be fixedly separated or directly integrally formed, and the present utility model does not limit this. In a specific embodiment, the first indenter 130 and the second indenter 230 are porous silicon carbide or porous graphite plates, while the first base 110 and the second base 210 are die steels. In another specific embodiment, the first indenter 130 and the first base 110 are integrally formed, and the second indenter 230 and the second base 210 are integrally formed. One side of the first base away from the first indenter is communicated with the first air pipe, and one side of the second base away from the second indenter is communicated with the second air pipe. Due to the integral formation, it can also be considered that there is no first base 110 at this time, that is, one side of the first indenter 130 is a shaping surface, and the surface opposite to the shaping surface (i.e., the side of the first base away from the first indenter) is communicated with the first air pipe.

[0046] Please continue to refer to Figure 1 , when the first / second base and the first / second indenter are fixedly separated, the first base or the second base is made of a dense material, and the dense material can be, for example, die steel. A plurality of uniformly arranged air flow channels 111 are provided on one side of the first base 110 close to the first indenter 130, and the air flow channels 111 are respectively communicated with the first air pipe 120 and the first indenter 130. The advantage of such a setting is that the air in the first air pipe 120 can uniformly contact the first indenter 130 through the air flow channels 111 as much as possible, thereby ensuring the uniformity of the gas in the entire first indenter 130, and further ensuring the good surface morphology of the ceramic forming blank.

[0047] Similarly, a uniformly arranged air flow channel 111 is provided on one side of the second base 210 close to the second indenter 230, and the air flow channel 111 is communicated with the second air pipe 220. The advantage of such a setting is that the air in the second air pipe 220 can uniformly contact the first indenter 130 through the air flow channels 111 as much as possible, thereby ensuring the uniformity of the gas in the entire first indenter 130, and further ensuring the good surface morphology of the ceramic forming blank.

[0048] Please continue to refer to Figure 1 , the porous material is preferably a pore with an open-connected structure, and the porous material is preferably porous metal, porous graphite, porous ceramic, porous plastic, etc. Preferably porous graphite, the advantage of choosing porous graphite is that the porous graphite material is suitable for the pressing of most ceramic muds due to its moderate price and high strength, and the plastic material is suitable for the pressing of green blanks with lower precision due to its lower modulus and easy deformation.

[0049] Further, the porous material is preferably a porous material with a pore diameter of 1-100 microns, preferably 5-50 microns. It can be well adapted to the solution provided by the present invention to ensure the morphology of the formed ceramic.

[0050] Please continue to refer to Figure 1 , the first base 110 and / or the second base 210 are preferably prepared from a dense high-strength material. There are many solutions for the dense high-strength material in the prior art, which will not be elaborated here. For example, it can be silicon nitride (Si3N4) ceramic material. The advantage of using a dense high-strength material is that it can well receive the relatively high pressure when pressing the ceramic mud, or a porous material with lower strength can be selected to reduce the manufacturing cost.

[0051] Naturally, the present invention also provides a ceramic complex curved surface forming system, including the aforementioned complex curved surface forming die, a pneumatic pressure regulating device 310, a press 320 and a controller 330. The controller 330 is electrically connected to the pneumatic pressure regulating device 310 and the pressure device. The controller 330 is used to control the pneumatic pressure regulating device 310 to output a set air pressure according to the state of the ceramic mud, and control the press 320 to selectively drive the complex curved surface forming die to move along a set direction.

[0052] Further, when the ceramic mud is in a plastic forming state, the controller 330 closes the pneumatic pressure regulating device 310, so that the first punch 130 and the second punch 230 are consistent with the external air pressure, and controls the press 320 to drive the complex curved surface forming die to move along a specific direction, so that the ceramic mud is plastically formed under the action of the first die 100 and the second die 200.

[0053] When the ceramic mud is in a demolding state, the controller 330 controls the pneumatic pressure regulating device 310 to a set positive air pressure, and the set positive air pressure is preferably 0.1 Mpa - 0.2 Mp.

[0054] When the ceramic mud is in a transportation state, the controller 330 controls the pneumatic pressure regulating device 310 to make one of the first punch 130 or the second punch 230 a set negative air pressure, and after being transported in place, it is pressurized to the external pressure to achieve placement, and the set negative air pressure is preferably -0.1 Mpa.

[0055] The following combines specific experimental examples to further elaborate the solution of the present invention.

[0056] Experimental Example 1: Preparation of a die for silicon carbide hyperbolic ceramic armor.

[0057] Two porous silicon carbide ceramic plates with dimensions of 150 mm × 150 mm × 20 mm and a pore size of 5 microns and a through-hole porosity of 40% are used. Both plates are processed on one side to be flat and on the other side to be curved, serving as the first punch 130 and the second punch 230. The first base 110 and the second base 210 are made of die steel with dimensions of 170 mm × 170 mm × 30 mm. The connecting surface is milled with connected air flow pipes 111 distributed in concentric circles with a size of 5 mm × 3 mm. The first air pipe 120 and the second air pipe 220 are respectively installed on the sides of the first base 110 and the second base 210. After fixing and connecting the ceramic punch and the steel base with epoxy resin, the mold is installed in the press 320.

[0058] A 150×150 mm×5 mm plastic silicon carbide mud blank is placed in it, and it is pressed from above and below to form a silicon carbide curved surface ceramic armor blank. After forming, the lower punch remains stationary, and a positive air pressure of 0.1 MPa is maintained in the first air pipe 120 and the second air pipe 220 for demolding; subsequently, the press 320 is controlled to lift the first mold 100, and a negative air pressure of 0.1 MPa is maintained in the first air pipe 120 of the first mold 100 to adsorb the silicon carbide curved surface ceramic armor blank to achieve transportation. After transportation in place, the upper punch changes the air pressure to 0.02 MPa to place the green body.

[0059] Experimental Example 2: Preparation of a mold for a silicon carbide mold used for a mobile phone 3D panel glass.

[0060] Two porous graphite plates with dimensions of 150 mm × 250 mm × 50 mm and a pore size of 100 microns are used. Both plates are processed on one side to be flat and on the other side to be curved, serving as the first punch 130 and the second punch 230. The first base 110 and the second base 210 are made of die steel. The connecting surface is milled with bead curtain - type connected air flow pipes 111 with a size of 5 mm × 3 mm. The first air pipe 120 and the second air pipe 220 are respectively installed on the sides of the first air pipe 120 and the second air pipe 220. After connecting the graphite punch and the steel base with epoxy resin, the mold is installed in the press 320.

[0061] A 150×250 mm×25 mm plastic silicon carbide mud blank is placed in it, and it is pressed from above and below, and demolded at an air pressure of 0.1 MPa to form a silicon carbide mold blank for a mobile phone 3D panel glass.

[0062] Experimental Example 3: Preparation of a mold for a ceramic mold used for spectacle lenses.

[0063] Two pieces of PM35 porous die steel with a diameter of Ф150mm×50mm and a pore diameter of 10 microns are used as the first indenter 130 and the second indenter 230. The inner cavity of the die is Ф100mm, and the first air pipe 120 and the second air pipe 220 are placed at the bottom. 300g of plastic ceramic mud containing chromium trioxide, clay, kaolin, bentonite and other formulas is put into the die, pressed up and down, and demolded at a pressure of 0.2MPa to form a ceramic die blank for spectacle lenses.

[0064] The above has introduced the solution of the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

[0065] Throughout the specification, reference to "an embodiment", "embodiment" or "specific embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention and not necessarily in all embodiments. Thus, the appearances of the phrases "in an embodiment", "in an embodiment" or "in a specific embodiment" in different places throughout the specification are not necessarily referring to the same embodiment. Additionally, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined in any suitable manner with one or more other embodiments. It should be understood that other variations and modifications of the embodiments of the invention described and shown herein may be made in accordance with the teachings herein and will be considered part of the spirit and scope of the present invention.

[0066] It should also be understood that one or more of the elements shown in the drawings may be implemented in a more separated or more integrated manner, or even removed because they cannot be operated in some cases or provided because they may be useful for a particular application.

[0067] In addition, unless otherwise clearly specified, any marked arrows in the drawings should be considered exemplary only and not restrictive. Moreover, unless otherwise specified, the term "or" as used herein generally means "and / or". Where the ability to provide separation or combination is unclear and is foreseen, the combination of components or steps will also be considered to have been specified.

Claims

1. A complex curved surface forming mold, used for preparing complex curved surface ceramic parts from ceramic mud, characterized in that: comprising a first mold and a second mold matching the first mold; The first mold comprises a first base, a first pressing head made of a porous material, a first ventilation pipe connected to the first pressing head, and a first sealing member; one side of the first pressing head is fixedly connected to the first base, and the other side opposite thereto is a shaping surface for contacting the ceramic mud; the side surface of the first pressing head is sealedly connected to the first sealing member for guiding the gas of the first ventilation pipe to the shaping surface; The second mold comprises a second base, a second pressing head made of a porous material, a second ventilation pipe connected to the second pressing head, and a second sealing member; one side of the second pressing head is fixedly connected to the second base, and the other side opposite thereto is a matching surface for matching with the shaping surface; the side surface of the first pressing head is sealedly connected to the first sealing member for guiding the gas of the second ventilation pipe to the matching surface; wherein The first ventilation pipe and the second ventilation pipe are used to communicate with the air pressure regulating device to selectively adjust the output air pressure of the shaping surface and the matching surface.

2. The complex curved surface forming die according to claim 1, characterized in that: The first base and the first pressing head are integrally arranged, the first pressing head is made of porous die steel, and a side of the first base away from the first pressing head is connected to the first ventilation pipe; Alternatively, the second base and the second pressing head are integrally arranged, the second pressing head is made of porous die steel, and a side of the second base away from the second pressing head is connected to the second ventilation pipe.

3. The complex curved surface forming die according to claim 1, characterized in that: The first base and the first pressure head are fixed separately, the first base and the first pressure head are connected by bolts, mortise and tenon joints, clamping connections, or epoxy resin connections, and the first base is made of dense material; Alternatively, the second base and the second pressure head are fixed separately, the second base and the second pressure head are connected by bolts, mortise and tenon joints, snap-on joints, or epoxy resin, and the second base is made of dense material.

4. The complex curved surface forming die according to claim 3, characterized in that: A plurality of airflow ducts are disposed on one side of the first base close to the first pressure head, and the plurality of airflow ducts are respectively connected with the first ventilation pipe and the first pressure head; Alternatively, a plurality of airflow ducts are provided on a side of the second base close to the second pressure head, and the plurality of airflow ducts are respectively connected to the second ventilation pipe and the second pressure head.

5. The complex curved surface forming die according to any one of claims 1 to 4, characterized in that: The shaping surface is a plane, a spherical surface, a parabola or a free-form surface.

6. The complex curved surface forming die according to any one of claims 1 to 4, characterized in that: The first sealing member and / or the second sealing member is a colloid, glue or an elastic sealing member.

7. The complex curved surface forming die according to any one of claims 1 to 4, characterized in that: The pore diameter of the porous material is 1-100 microns.

8. A ceramic complex curved surface forming system, used to prepare complex curved surface ceramic parts by semi-wet shaping process of ceramic mud, characterized in that: It comprises a press, an air pressure regulating device, a controller and a complex curved surface forming mold as described in any one of claims 1 to 7, wherein the press is fixedly connected to a first base and a second base of the complex curved surface forming mold respectively, and the connection position of the press and the first base and / or the second base is arranged on a side away from the ceramic mud; in The controller is electrically connected to the press and the air pressure regulating device. The controller is used to control the air pressure regulating device to output a set air pressure according to the state of the ceramic clay, and to control the press to selectively drive the first mold and / or the second mold to move along a set direction.

9. The ceramic complex curved surface forming system according to claim 8, characterized in that: The controller is configured to: When the ceramic mud material is in a shaping state, the controller controls the air pressure regulating device to be closed so that the output air pressure of the shaping surface and the matching surface is consistent with the ambient air pressure; When the ceramic clay material is in a demoulding state, the controller controls the air pressure regulating device to output a set positive air pressure to both the shaping surface and the matching surface; When the ceramic mud is in a transporting state, the controller controls the air pressure regulating device to output a set negative air pressure to the shaping surface and / or the matching surface.

10. The ceramic complex curved surface forming system according to claim 9, characterized in that: The set positive air pressure is 0.1Mpa-0.2Mpa, and the set negative air pressure is -0.1Mpa; Alternatively, the porous material has a diameter of 5-50 microns.

Images