Sintering and shaping mold for silicon nitride ceramics

Abstract

The utility model is suitable for ceramic processing technical field provides a kind of sintering of silicon nitride ceramic, and provides a kind of sintering of silicon nitride ceramic, including: base plate;Bottom die shell being arranged on the base plate, the middle part position of bottom die shell is boss, for placing the silicon nitride ceramic piece to be shaped;Liftable upper die shell being arranged in the bottom die shell;Polish inner lining being arranged on the inner wall of the upper die shell;Driving mechanism being arranged on the bottom die shell with the upper die shell, for driving the rotation of the upper die shell.The utility model provides the sintering of silicon nitride ceramic of the sintering of silicon nitride ceramic of the present scheme, through the cooperation of base plate, bottom die shell, upper die shell, polish inner lining and driving mechanism, the mechanization polishing shaping of silicon nitride ceramic piece is realized, reduces manual intervention to improve processing efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of ceramic processing technology, and in particular relates to a sintering and shaping mold for silicon nitride ceramics. Background Technology

[0002] Silicon nitride ceramics, as a high-performance inorganic material, demonstrate irreplaceable value in numerous industrial fields due to its unique low shrinkage during sintering. Its extremely high strength, especially hot-pressed silicon nitride, places it among the hardest materials in the world. It also possesses a series of excellent properties such as high strength, low density, and high temperature resistance, making it widely used in aerospace, machinery manufacturing, and electronic information industries—fields with stringent material performance requirements.

[0003] However, after sintering, silicon nitride ceramics often exhibit surface protrusions. These protrusions not only affect the appearance quality of the product, but more importantly, they can also negatively impact its subsequent assembly accuracy and performance. Therefore, grinding and reshaping are necessary. Currently, the treatment of surface protrusions in sintered silicon nitride ceramics typically involves manual hand-held grinding tools or reshaping with ordinary abrasives. However, manual grinding is inefficient. Utility Model Content

[0004] This invention provides a sintering and shaping mold for silicon nitride ceramics, aiming to solve the problem of low efficiency in treating surface protrusions after sintering silicon nitride ceramics.

[0005] This utility model is implemented as follows: a sintering and shaping mold for silicon nitride ceramics includes: a base plate; a bottom mold shell disposed on the base plate, the bottom mold shell having a boss at its center for placing the silicon nitride ceramic part to be shaped; an upper mold shell disposed inside the bottom mold shell and capable of being raised and lowered; a polished inner lining disposed on the inner wall of the upper mold shell; and a driving mechanism disposed on the bottom mold shell and the upper mold shell for driving the upper mold shell to rotate.

[0006] Preferably, the driving mechanism includes: a mounting shell fixed to one side of the bottom mold shell; a motor fixed inside the mounting shell; and a first bevel gear and a second bevel gear respectively fixed to the output shaft of the motor and the upper mold shell, wherein the first bevel gear and the second bevel gear can mesh with each other.

[0007] Preferably, an electric telescopic rod is fixedly installed on the base plate, a connecting plate is fixedly installed on the push rod of the electric telescopic rod, a rotating shaft is rotatably installed on the connecting plate via a bearing, and the bottom end of the rotating shaft is fixedly connected to the upper mold shell.

[0008] Preferably, a support plate is symmetrically fixedly installed on the bottom of the bottom mold shell, and the bottom of the support plate is fixedly connected to the base plate.

[0009] Preferably, the bottom of the bottom mold shell has an opening for discharging debris during the shaping process.

[0010] Preferably, a collection box is slidably mounted on the support plate, and a handle is fixedly mounted on the collection box.

[0011] Preferably, mounting plates are symmetrically fixed on the inner wall of the bottom mold shell, and ball bearings are embedded in the mounting plates. The ball bearings are adapted to the annular grooves opened on the upper mold shell.

[0012] Compared with related technologies, the sintering and shaping mold for silicon nitride ceramics provided by this utility model has the following beneficial effects:

[0013] The mechanized grinding and shaping of silicon nitride ceramic parts is achieved through the cooperation of the base plate, bottom mold shell, upper mold shell, polishing liner and drive mechanism, reducing manual intervention and improving processing efficiency; the stable power transmission provided by the motor, first bevel gear and second bevel gear, and the smooth lifting and lowering of the upper mold shell by the electric telescopic rod, connecting plate and rotating shaft are conducive to improving shaping quality and operation convenience. Attached Figure Description

[0014] Figure 1 A schematic diagram of the main structure of a sintering and shaping mold for silicon nitride ceramics provided by this utility model;

[0015] Figure 2 This is a schematic diagram of the front sectional view of the present invention;

[0016] Figure 3 for Figure 2 An enlarged structural diagram of part A shown in the figure;

[0017] Figure 4 This is a schematic diagram of the structure of the upper mold shell after it is raised in this utility model.

[0018] Reference numerals in the attached drawings: 1. Base plate; 2. Bottom mold shell; 3. Upper mold shell; 4. Polished inner lining; 5. Mounting plate; 6. Ball bearing; 7. Mounting shell; 8. Motor; 9. First bevel gear; 10. Second bevel gear; 11. Electric telescopic rod; 12. Connecting plate; 13. Support plate; 14. Collection box; 15. Boss; 16. Rotating shaft. Detailed Implementation

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] This utility model embodiment provides a sintering and shaping mold for silicon nitride ceramics, such as... Figure 1-4 As shown, the sintering and shaping mold for silicon nitride ceramics includes: a base plate 1; a bottom mold shell 2 disposed on the base plate 1, wherein the bottom mold shell 2 has a boss 15 at the center for placing the silicon nitride ceramic part to be shaped; an upper mold shell 3 disposed inside the bottom mold shell 2 and capable of being raised and lowered; a polished inner liner 4 disposed on the inner wall of the upper mold shell 3; and a driving mechanism disposed on the bottom mold shell 2 and the upper mold shell 3 for driving the upper mold shell 3 to rotate.

[0021] In this embodiment, during use, the silicon nitride ceramic part to be shaped is placed on the boss 15 of the bottom mold shell 2. The upper mold shell 3 is rotated by the drive mechanism, so that the polished inner lining 4 on the inner wall of the upper mold shell 3 comes into contact with the surface of the silicon nitride ceramic part. Then the drive mechanism drives the upper mold shell 3 to rotate, and the polished inner lining 4 rotates with the upper mold shell 3 to polish and shape the protrusions on the surface of the silicon nitride ceramic part. The drive mechanism drives the upper mold shell 3 to automatically complete the rotation action, realizing the mechanized polishing and shaping of the silicon nitride ceramic part and reducing manual intervention.

[0022] Replacing manual operation with mechanical drive helps improve the efficiency of surface protrusion treatment after silicon nitride ceramic sintering; at the same time, the polishing liner 4 (such as sandpaper, diamond coating or ceramic abrasive layer) cooperates with the upper mold shell 3 to form a stable constraint on the polishing process, which is conducive to improving the consistency of the process. In addition, the cooperation between the bottom mold shell 2 and the upper mold shell 3 can provide stable support for the silicon nitride ceramic parts and reduce shaking during the process.

[0023] In a further preferred embodiment of the present invention, the driving mechanism includes: a mounting shell 7 fixed to one side of the bottom mold shell 2; a motor 8 fixed inside the mounting shell 7; a first bevel tooth 9 and a second bevel tooth 10 respectively fixed to the output shaft of the motor 8 and the upper mold shell 3, wherein the first bevel tooth 9 and the second bevel tooth 10 can mesh with each other.

[0024] In this embodiment, when it is necessary to drive the upper mold shell 3 to rotate, the motor 8 inside the mounting shell 7 is started. The output shaft of the motor 8 drives the first bevel tooth 9 to rotate. Since the first bevel tooth 9 and the second bevel tooth 10 mesh with each other, the rotation of the first bevel tooth 9 will drive the second bevel tooth 10 to rotate, thereby driving the upper mold shell 3 to rotate.

[0025] Power is provided by motor 8, and the rotational motion of motor 8 is transmitted to upper mold shell 3 through the meshing transmission of first bevel gear 9 and second bevel gear 10, so as to realize the automatic rotation of upper mold shell 3.

[0026] In a further preferred embodiment of this utility model, an electric telescopic rod 11 is fixedly installed on the base plate 1, a connecting plate 12 is fixedly installed on the push rod of the electric telescopic rod 11, and a rotating shaft 16 is rotatably installed on the connecting plate 12 via a bearing. The bottom end of the rotating shaft 16 is fixedly connected to the upper mold shell 3.

[0027] In this embodiment, when it is necessary to adjust the height of the upper mold shell 3, the electric telescopic rod 11 on the base plate 1 is activated. The push rod of the electric telescopic rod 11 extends and retracts, driving the connecting plate 12 to rise and fall. The rotating shaft 16 of the connecting plate 12, which is rotatably mounted through the bearing, rises and falls accordingly, thereby driving the upper mold shell 3 to rise and fall.

[0028] Power is provided by the electric telescopic rod 11, and the telescopic movement of the push rod is converted into the lifting and lowering movement of the connecting plate 12 and the rotating shaft 16, so as to realize the automatic adjustment of the height of the upper mold shell 3. The rotational connection between the rotating shaft 16 and the connecting plate 12 does not affect the rotation of the upper mold shell 3.

[0029] This structure allows for convenient control of the lifting and lowering of the upper mold shell 3, facilitating the placement or removal of the silicon nitride ceramic parts to be shaped on the boss 15. At the same time, the driving method of the electric telescopic rod 11 ensures a smooth lifting and lowering process for the upper mold shell 3, helping to avoid damage to the silicon nitride ceramic parts caused by unstable lifting and lowering.

[0030] In a further preferred embodiment of the present invention, a support plate 13 is symmetrically fixedly installed on the bottom of the bottom mold shell 2, and the bottom of the support plate 13 is fixedly connected to the base plate 1.

[0031] In this embodiment, the bottom mold shell 2 is mounted on the base plate 1 by a support plate 13 that is symmetrically fixed at the bottom. The top end of the support plate 13 is fixed to the bottom mold shell 2, and the bottom end is fixed to the base plate 1, forming a support structure for the bottom mold shell 2.

[0032] When the silicon nitride ceramic parts are sintered and shaped in the mold, the parts to be shaped are placed on the boss 15 of the bottom mold shell 2, the upper mold shell 3 is polished, and the support plate 13 transmits the force on the bottom mold shell 2 to the base plate 1, so that the bottom mold shell 2 maintains a stable position.

[0033] In a further preferred embodiment of the present invention, the bottom of the bottom mold shell 2 is provided with an opening for discharging debris during the shaping process.

[0034] In this embodiment, the bottom of the bottom mold shell 2 is provided with an opening that is connected to the inside of the bottom mold shell 2, providing a discharge channel for the debris generated during the shaping process.

[0035] When shaping silicon nitride ceramic parts, the polished inner lining 4 of the inner wall of the upper mold shell 3 contacts the surface of the silicon nitride ceramic parts and rotates to polish them. The generated debris will fall to the bottom of the lower mold shell 2 under the action of gravity or with the airflow, and then be discharged from the lower mold shell 2 through the outlet.

[0036] The opening allows for the timely removal of debris generated during the shaping process, helping to reduce debris accumulation within the bottom mold shell 2. Simultaneously, it prevents debris accumulation from interfering with the shaping process of the silicon nitride ceramic parts, thus maintaining a clean grinding environment.

[0037] In a further preferred embodiment of the present invention, a collection box 14 is slidably mounted on the support plate 13, and a handle is fixedly mounted on the collection box 14.

[0038] In this embodiment, a collection box 14 is slidably mounted on the support plate 13. The collection box 14 is located below the bottom opening of the bottom mold shell 2, and a handle is fixedly mounted on one side of it to facilitate pushing and pulling operations of the collection box 14.

[0039] During the shaping of silicon nitride ceramic parts, the debris discharged from the bottom mold shell 2 will fall into the collection box 14. When the debris in the collection box 14 accumulates to a certain amount, the collection box 14 can be slid off the support plate 13 by pulling the handle to clean the debris.

[0040] In a further preferred embodiment of the present invention, mounting plates 5 are symmetrically fixed on the inner wall of the bottom mold shell 2, and ball bearings 6 are embedded in the mounting plates 5. The ball bearings 6 are adapted to the annular grooves formed on the upper mold shell 3.

[0041] In this embodiment, mounting plates 5 are symmetrically fixed on the inner wall of the bottom mold shell 2, and ball bearings 6 are embedded in the mounting plates 5. The ball bearings 6 are adapted to the annular groove opened on the upper mold shell 3, that is, the ball bearings 6 can be embedded in the annular groove and roll along the annular groove.

[0042] When the drive mechanism drives the upper mold shell 3 to rotate, the annular groove of the upper mold shell 3 contacts the ball 6. The ball 6 rolls in the annular groove as the upper mold shell 3 rotates, while the mounting plate 5 supports the ball 6.

[0043] In summary, compared with related technologies, the mechanized grinding and shaping of silicon nitride ceramic parts is achieved through the cooperation of the base plate 1, bottom mold shell 2, upper mold shell 3, polishing liner 4 and drive mechanism, reducing manual intervention and improving processing efficiency. The stable power transmission provided by the motor 8, first bevel gear 9 and second bevel gear 10, and the smooth lifting and lowering of the upper mold shell 3 by the electric telescopic rod 11, connecting plate 12 and rotating shaft 16 are all conducive to improving shaping quality and ease of operation.

[0044] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0045] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A sintering and shaping mold for silicon nitride ceramic, characterized in that, include: Base plate; The bottom mold shell is set on the base plate, and the middle part of the bottom mold shell is a boss for placing the silicon nitride ceramic part to be shaped. An upper mold shell that is located inside the bottom mold shell and can be raised and lowered; A polished inner liner is provided on the inner wall of the upper mold shell; A drive mechanism is provided on the bottom mold shell and the upper mold shell to drive the upper mold shell to rotate.

2. The sintering and shaping mold for silicon nitride ceramic as described in claim 1, characterized in that, The drive mechanism includes: A mounting shell fixed to one side of the bottom mold shell; The motor is fixed inside the mounting housing; The first bevel tooth and the second bevel tooth are respectively fixed on the output shaft of the motor and the upper mold shell, and the first bevel tooth and the second bevel tooth can mesh with each other.

3. The sintering and shaping mold for silicon nitride ceramic as described in claim 1, characterized in that, An electric telescopic rod is fixedly installed on the base plate, and a connecting plate is fixedly installed on the push rod of the electric telescopic rod. A rotating shaft is rotatably installed on the connecting plate through a bearing, and the bottom end of the rotating shaft is fixedly connected to the upper mold shell.

4. The sintering and shaping mold for silicon nitride ceramics as described in claim 1, characterized in that, Support plates are symmetrically fixedly installed on the bottom of the bottom mold shell, and the bottom of the support plates is fixedly connected to the base plate.

5. The sintering and shaping mold for silicon nitride ceramics as described in claim 1, characterized in that, The bottom of the mold shell has an opening for discharging debris during the shaping process.

6. The sintering and shaping mold for silicon nitride ceramics as described in claim 4, characterized in that, A collection box is slidably mounted on the support plate, and a handle is fixedly mounted on the collection box.

7. The sintering and shaping mold for silicon nitride ceramic as described in claim 1, characterized in that, The inner wall of the bottom mold shell is symmetrically fixed with mounting plates, and the mounting plates are inlaid with ball bearings, which are adapted to the annular grooves opened on the upper mold shell.

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