Ceramic body compression mold

Abstract

The utility model relates to medical instrument technical field discloses a kind of ceramic body compression mould, including mould body, ejection mechanism, compression mechanism and ultrasonic vibration device, compression cavity is built-in in mould body, compression cavity is located the top end and bottom end of mould body and is all set as open, ejection mechanism is set to the bottom of mould body and is sealed with compression cavity Connection, ejection mechanism is configured as the compression blank of ejection compression cavity inside compression forming, compression mechanism is set to the top of mould body, part of ejection mechanism is moved into compression cavity, ultrasonic vibration device is electrically connected with mould body.The ceramic body compression mould is provided with multidirectional high-frequency vibration by ultrasonic vibration device, promotes the movement rearrangement of powder, improves the uniformity and compactness of compression blank, subsequent need not to carry out cold isostatic pressing, for nano powder material also can directly carry out compression, need not to carry out preceding spray granulation, make the forming process of ceramic body more simple, cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a ceramic body pressing mold. Background Technology

[0002] Ceramic forming is an important part of the ceramic manufacturing process. Ceramic forming technology largely determines the uniformity of the green body and the ability to produce complex-shaped parts, and directly affects the mechanical properties of ceramic products.

[0003] Currently, ceramic products are typically manufactured using a combination of molding and isostatic pressing, requiring steps such as spray granulation, dry pressing, and cold isostatic pressing. This process is complex and costly. Specifically, due to the nanoscale effect, nano-sized powders easily agglomerate during mixing. Therefore, before dry pressing, different nano-powders need to be spray-granulated with a binder. During production, the granulated powder is used for molding. After adding the binder, debinding is necessary during subsequent sintering. Incomplete debinding will affect the density and mechanical properties of the ceramic product.

[0004] Therefore, there is an urgent need to design a new ceramic body molding die to improve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a ceramic body molding die to solve the technical problems of complex and costly forming of existing ceramic body products.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Ceramic body molding die, including:

[0008] The mold body has a built-in molding cavity, which is open at both the top and bottom ends of the mold body;

[0009] An ejection mechanism is disposed at the bottom of the mold body and sealed to the molding cavity. The ejection mechanism is configured to eject the molded blank formed in the molding cavity.

[0010] A forming mechanism, wherein the forming mechanism is disposed on the top of the mold body, and a portion of the ejection mechanism extends movably into the forming cavity; and

[0011] An ultrasonic vibration device is electrically connected to the mold body.

[0012] As a preferred embodiment of the ceramic body molding die, the ejection mechanism includes:

[0013] A base, wherein a pressing head is provided on the base, the pressing head movably extends into the molding cavity, and the outer wall of the pressing head is in contact with the inner wall of the molding cavity; and

[0014] A lifting control device is provided between the base and the mold body.

[0015] As a preferred embodiment of ceramic molding die, the base has a through hole coaxially arranged with the bottom opening of the molding cavity, and the lower pressing head passes through the through hole.

[0016] As a preferred embodiment of ceramic molding die, the control lifting device includes a spring, one end of which is fixedly connected to the end face of the base, and the other end is fixedly connected to the die body.

[0017] As a preferred embodiment of the ceramic body molding die, one spring is provided, and the axis of the spring is coaxial with the perforation.

[0018] As a preferred embodiment of ceramic molding die, multiple springs are provided, and the multiple springs are arranged in a circular array with the axial direction of the perforation as the center line.

[0019] As a preferred embodiment of the ceramic body forming mold, the forming mechanism includes:

[0020] Hydraulic press; and

[0021] An upper pressure head is located at one end of the mold body away from the ejection mechanism. One end of the upper pressure head extends movably into the molding cavity, and the hydraulic press provides pressure to the other end of the upper pressure head.

[0022] As a preferred embodiment of a ceramic molding die, the upper pressure head includes an integrally formed flat head and an extrusion part, the diameter of the flat head being larger than the diameter of the extrusion part, and the extrusion part extending movably into the molding cavity.

[0023] As a preferred embodiment of ceramic molding die, the die body has an annular protrusion on its outer edge facing the ejection mechanism.

[0024] As a preferred embodiment of ceramic molding die, the annular protrusion facing away from the ejection mechanism and the periphery of the die body are configured as ultrasonic vibration surfaces.

[0025] The beneficial effects of this utility model are:

[0026] This utility model provides a ceramic body molding die. The powder to be processed is poured into the molding cavity from the top of the die body. The molding mechanism is installed at the top of the die body, and part of the molding mechanism extends into the molding cavity to provide pressure, molding the powder into a blank. At the same time, the ejection mechanism is pushed into a contracted state. During the molding process, the ultrasonic vibration device is kept on. The multi-directional high-frequency vibration provided by the ultrasonic vibration device promotes the movement and rearrangement of the powder, improving the uniformity and density of the blank. Subsequent cold isostatic pressing is not required. Nanoparticles can also be directly molded without prior spray granulation, making the ceramic body forming process simpler and lower in cost. In addition, when the molding is completed and the molding mechanism is reset and lifted, the ejection mechanism is immediately reset and ejects the blank from the molding cavity, which is beneficial for the demolding of the blank and makes the production efficiency higher. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the ceramic body molding die structure provided by this utility model;

[0028] Figure 2 This is a cross-sectional view of the ceramic body molding die provided by this utility model.

[0029] In the picture:

[0030] 1. Mold body; 11. Forming cavity; 12. Annular protrusion; 13. Ultrasonic vibration surface;

[0031] 2. Ejection mechanism; 21. Base; 211. Perforation; 22. Spring; 23. Downward pressure head;

[0032] 3. Upper pressure head; 31. Flat head; 32. Extrusion section. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] Currently, ceramic products are typically manufactured using a combination of molding and isostatic pressing, requiring steps such as spray granulation, dry pressing, and cold isostatic pressing. This process is complex and costly. Specifically, due to the nanoscale effect, nano-sized powders easily agglomerate during mixing. Therefore, before dry pressing, different nano-powders need to be spray-granulated with a binder. During production, the granulated powder is used for molding. After adding the binder, debinding is necessary during subsequent sintering. Incomplete debinding will affect the density and mechanical properties of the ceramic product.

[0038] To solve the above problems, combined with Figure 1 and Figure 2 As shown, this embodiment provides a ceramic body molding die, including a die body 1, an ejector mechanism 2, a molding mechanism, and an ultrasonic vibration device. The die body 1 has a molding cavity 11 inside, which is open at both the top and bottom ends. The ejector mechanism 2 is located at the bottom of the die body 1 and is sealed to the molding cavity 11. The ejector mechanism 2 is configured to eject the molded blank from the molding cavity 11. The molding mechanism is located at the top of the die body 1, and part of the ejector mechanism 2 extends into the molding cavity 11. The ultrasonic vibration device is electrically connected to the die body 1.

[0039] Understandably, the powder to be processed is poured into the molding cavity 11 from the top of the mold body 1. The molding mechanism is installed at the top of the mold body 1, and part of the molding mechanism extends into the molding cavity 11 to provide pressure, molding the powder into a compact. At the same time, the ejector mechanism 2 is pushed into a contracted state. During the molding process, the ultrasonic vibration device is kept on. The multi-directional high-frequency vibration provided by the ultrasonic vibration device promotes the movement and rearrangement of the powder, improving the uniformity and density of the compact. Subsequent cold isostatic pressing is not required. Nanoparticles can also be directly molded without prior spray granulation, making the ceramic body forming process simpler and lower in cost. In addition, when the molding is completed and the molding mechanism is reset and lifted, the ejector mechanism 2 is immediately reset and ejects the compact from the molding cavity 11, which is beneficial for demolding the compact and makes the production efficiency higher.

[0040] Specifically, such as Figure 1 As shown, the mold body 1 in this embodiment is cylindrical, with its axial direction extending vertically. The inner diameter of the molding cavity 11 matches the diameter of the pre-set blank. An annular protrusion 12 is provided on the outer edge of the mold body 1 facing the ejector mechanism 2. The end face of the annular protrusion 12 forms a stepped surface with the outer periphery of the mold body 1. Thus, the end face of the annular protrusion 12 facing away from the ejector mechanism 2 and the periphery of the mold body 1 are configured as ultrasonic vibration surfaces 13, thereby providing vibration to the bottom and interior of the blank, resulting in better compactness. Furthermore, since the principle and specific structure of the ultrasonic vibration device are existing technologies, this embodiment will not elaborate further on them.

[0041] Furthermore, such as Figure 2 As shown, the ejection mechanism 2 in this embodiment includes a base 21 and a control lifting device. The base 21 and the mold body 1 are spaced apart in the vertical direction. A lower pressure head 23 is provided on the base 21. The lower pressure head 23 extends movably into the molding cavity 11. The outer wall of the lower pressure head 23 fits against the inner wall of the molding cavity 11 to ensure that there is no gap between the lower pressure head 23 and the molding cavity 11. The control lifting device is located between the base 21 and the mold body 1. As the molding mechanism squeezes the powder in the molding cavity 11, it synchronously pushes the base 21 downward. At this time, the control lifting device and the base 21 retract synchronously, and the lower pressure head 23 extends into the molding cavity 11 to cooperate with the molding mechanism to mold the powder.

[0042] Specifically, the base 21 has a through hole 211 coaxially arranged with the bottom opening of the molding cavity 11, and the lower pressing head 23 passes through the through hole 211. The base 21 and the lower pressing head 23 are connected by an insertion joint, making installation and disassembly more convenient. Of course, in other embodiments, the end of the lower pressing head 23 can be welded and fixed to the base 21. The connection form between the base 21 and the lower pressing head 23 is not specifically limited in this embodiment.

[0043] In addition, such as Figure 2As shown, the control lifting device is preferably a spring 22. One end of the spring 22 is fixedly connected to the end face of the base 21, and the other end of the spring 22 is fixedly connected to the mold body 1. The spring 22 has the advantages of simple structure and low cost, and has good resilience and synchronization. It can shrink synchronously with the extrusion of the forming mechanism, and immediately rebound and eject the pressed blank when reset. In other embodiments, the control lifting device can also be a hydraulic cylinder or a pneumatic cylinder, etc., which is not specifically limited in this embodiment.

[0044] Preferably, in this embodiment, a single spring 22 is provided, and the axis of the spring 22 is coaxial with the through hole 211. The pressing head 23 passes through the through hole 211, then through the spring 22, and extends into the molding cavity 11. The pressing head 23 can guide the extension and retraction of the spring 22, making the pressure on the spring 22 more even.

[0045] In other embodiments, multiple springs 22 are provided, and the multiple springs 22 are arranged in a circular array with the axial direction of the through hole 211 as the center line. Specifically, there can be two, three, four or even more springs, and this embodiment does not make a specific limitation.

[0046] Specifically, such as Figure 2 As shown, the molding mechanism of this embodiment includes a hydraulic press (not shown) and an upper pressure head 3. The upper pressure head 3 is located at the end of the mold body 1 away from the ejection mechanism 2. One end of the upper pressure head 3 extends movably into the molding cavity 11. The hydraulic press provides pressure to the other end of the upper pressure head 3. The specific structure of the hydraulic press is prior art, and this embodiment will not describe it in further detail. The upper pressure head 3 has a "T" shaped cross-section and includes an integrally formed flat head 31 and an extrusion part 32. The diameter of the flat head 31 is larger than the diameter of the extrusion part 32. The extrusion part 32 extends movably into the molding cavity 11 to mold the powder. The flat head 31 contacts the output end of the hydraulic press. The flat head 31 increases the contact area with the hydraulic press, which facilitates installation.

[0047] Now combined Figure 1 and Figure 2 The pressing process of ceramic body molding dies will be described in further detail:

[0048] First, remove the upper pressure head 3 and pour the powder into the molding cavity 11;

[0049] Then, install the pressure head 3, start the ultrasonic vibration device (1000KHZ-50000KHZ), and start the hydraulic press 10-30 minutes after the ultrasonic vibration device is turned on. The pressure of the hydraulic press is 50MPa-200MPa.

[0050] Finally, after the pressing is completed, turn off the ultrasonic vibration device and control the lifting device to lower the ultrasonic vibration surface 13 of the mold body 1 to eject the pressed blank.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A ceramic body pressing mold, characterized in that, include: The mold body (1) has a molding cavity (11) inside, and the molding cavity (11) is open at both the top and bottom of the mold body (1). Ejection mechanism (2), the ejection mechanism (2) is disposed at the bottom of the mold body (1) and sealed to the molding cavity (11), the ejection mechanism (2) is configured to eject the molded blank formed in the molding cavity (11); A forming mechanism is disposed on the top of the mold body (1), and a portion of the ejection mechanism (2) extends movably into the forming cavity (11); and An ultrasonic vibration device is electrically connected to the mold body (1).

2. The ceramic body forming mold according to claim 1, characterized in that, The ejection mechanism (2) includes: A base (21) is provided with a pressing head (23), the pressing head (23) extending movably into the molding cavity (11), and the outer wall of the pressing head (23) fitting against the inner wall of the molding cavity (11); and A lifting control device is provided between the base (21) and the mold body (1).

3. The ceramic body molding die according to claim 2, characterized in that, The base (21) has a through hole (211) that is coaxial with the bottom opening of the molding cavity (11), and the lower pressing head (23) passes through the through hole (211).

4. The ceramic body molding die according to claim 3, characterized in that, The control lifting device includes a spring (22), one end of which is fixedly connected to the end face of the base (21), and the other end is fixedly connected to the mold body (1).

5. The ceramic body forming mold according to claim 4, characterized in that, One spring (22) is provided, and the axial direction of the spring (22) is coaxial with the through hole (211).

6. The ceramic body forming mold according to claim 4, characterized in that, Multiple springs (22) are provided, and the multiple springs (22) are arranged in a ring array with the axial direction of the perforation (211) as the center line.

7. The ceramic body forming mold according to claim 1, characterized in that, The forming mechanism includes: Hydraulic press; and The upper pressure head (3) is located at one end of the mold body (1) away from the ejection mechanism (2). One end of the upper pressure head (3) extends into the molding cavity (11), and the hydraulic press provides pressure to the other end of the upper pressure head (3).

8. The ceramic body forming mold according to claim 7, characterized in that, The upper pressure head (3) includes an integrally formed flat head (31) and an extrusion part (32). The diameter of the flat head (31) is larger than the diameter of the extrusion part (32), and the extrusion part (32) extends movably into the molding cavity (11).

9. The ceramic body forming mold according to claim 1, characterized in that, The mold body (1) has an annular protrusion (12) on its outer edge facing the ejection mechanism (2).

10. The ceramic body pressing mold according to claim 9, characterized in that, The annular protrusion (12) facing away from the end face of the ejection mechanism (2) and the periphery of the mold body (1) are configured as an ultrasonic vibration surface (13).

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