A mold and method for preparing a preform of an all-ceramic denture

Abstract

The present invention relates to the technical field of preparing all-ceramic denture preforms, and discloses a mold and a preparation method for an all-ceramic denture preform, comprising a base and a vibration plate installed above the base, wherein a plurality of pairs of denture molds are arranged on the vibration plate. The present invention can effectively prevent ceramic slurry from splashing during the vibration process by providing a cover plate, thereby avoiding pollution of the working environment, reducing cleaning costs and slurry waste; and the clamping rod prevents the mold from being accidentally positioned during vibration, and can achieve precise positioning of a single mold after the vibration is completed, and there is no need to stop the vibration plate during disassembly, thereby avoiding interruption of the vibration process of other molds due to the disassembly operation, and ensuring that the slurry density is not affected; and in combination with a compensation cylinder, the slurry reduced due to the discharge of bubbles is replenished in time, ensuring that the slurry in all molds can be evenly dense, significantly improving the preparation efficiency and product quality of the all-ceramic denture preform.

Description

Technical Field

[0001] The present invention belongs to the technical field of preparing all-ceramic denture preforms, and in particular relates to a mold and a method for preparing an all-ceramic denture preform. Background Art

[0002] All-ceramic dentures are widely used in dental restorations due to their excellent biocompatibility, aesthetics, and strength. The preparation of the preform is a key step in the production of all-ceramic dentures. Currently, vibration molding is commonly used to evenly distribute the ceramic slurry within the mold and remove air bubbles, thereby improving the denture's molding quality.

[0003] However, during the vibration process, ceramic slurry easily splashes out of the mold, which not only pollutes the working environment and increases the cost and difficulty of cleaning, but may also lead to slurry waste and increase production costs. On the other hand, in actual production, in order to improve efficiency, a large number of molds are usually placed on the vibration plate at the same time for vibration operation. Due to differences in factors such as the amount of slurry filled in each mold and the placement position, the vibration of the mold is not completely synchronized. When a single mold needs to be disassembled, the operation is extremely inconvenient. If the vibration plate is stopped to disassemble the mold, the normal vibration process of other molds will be interrupted, and the slurry that has not been completed by vibration and density will not be able to fully expel bubbles and evenly distribute due to the cessation of vibration, resulting in the slurry density being affected and reducing overall production efficiency. If the vibration plate is forcibly disassembled while it is continuously vibrating, the violent vibration will not only easily cause injury to the operator, but also make it difficult to accurately position the mold, let alone stably disassemble it, which seriously restricts the efficient and high-quality production of all-ceramic denture preforms.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] A mold for preparing an all-ceramic denture preform comprises a base and a vibration plate installed above the base, wherein a plurality of pairs of denture molds are arranged on the vibration plate.

[0007] A bending frame is slidably mounted on the base, and the end of the bending frame is vertically slidably connected to the denture mold to limit the vibration direction of the denture mold;

[0008] A positioning sleeve is installed on the bending frame, and a clamping rod is inserted into the interior of the positioning sleeve. The clamping rod corresponds to the clamping slot provided on the side wall of the denture mold, and after the denture mold moves to the highest point, the clamping rod is clamped in the clamping slot to position the denture mold;

[0009] A cover plate is rotatably mounted on the denture mold to prevent slurry from splashing during vibration, and an insert plate is mounted on the side wall of the cover plate to cover the outside of the card slot to ensure that the denture mold will not be positioned during vibration;

[0010] A compensation cylinder is installed on the positioning sleeve. After the positioning sleeve covers the denture mold, the outlet of the compensation cylinder faces downward to compensate for the lack of slurry caused by vibration.

[0011] As a preferred embodiment of the present invention, support legs are installed at the bottom of the vibration plate, and the support legs are interconnected with the surface of the base.

[0012] As a preferred embodiment of the present invention, several pairs of slide rails are provided on the base, and a limit rod is installed inside the slide rail. A slider is slidably provided on the slide rail, and the slider and the limit rod are movably passed through. A limit spring is sleeved on the outer wall of the limit rod, and one end of the limit spring is clamped on the slider, and the other end of the limit spring is clamped on the side wall of the slide rail. A bolt is screwed on the slider, and the bolt is used to lock the slider and the base, and the slider is connected to the bending frame.

[0013] As a preferred embodiment of the present invention, a reinforcing rib is installed at the bend of the bending frame, and the reinforcing rib is triangular. A connecting plate is installed at the end of the bending frame, and a connecting seat is installed on the side wall of the connecting plate. A sliding rod is installed on the connecting seat, and a slide is slidably provided on the sliding rod. The side wall of the slide is connected to the denture mold, and a positioning plate is installed on the top of the sliding rod by a bolt, and the positioning plate is used to prevent the slide and the sliding rod from disengaging.

[0014] As a preferred embodiment of the present invention, a cavity is provided inside the denture mold, the cavity is inclined, and a core adapted to the shape of the denture is provided at the lowest point of the cavity.

[0015] As a preferred embodiment of the present invention, a positioning seat is installed on the side wall of the cover plate, a positioning shaft is installed through the positioning seat, a fixing seat is rotatably installed on the outer side wall of the positioning shaft, and the fixing seat is welded to the side wall of the denture mold.

[0016] As a preferred embodiment of the present invention, a sliding cavity is opened inside the positioning sleeve, and a baffle is slidably arranged inside the sliding cavity. One end of the baffle is connected to the clamping rod, and the end of the clamping rod is chamfered. A reset spring is installed at the other end of the clamping rod, and the other end of the reset spring is clamped on the inner wall of the sliding cavity. The reset spring is in a compressed state, and the compression direction of the reset spring and the moving direction of the clamping rod are on the same straight line.

[0017] As a preferred embodiment of the present invention, a mounting plate is provided on the top of the compensation cylinder, a sealing plate is installed on the mounting plate, the sealing plate and the mounting plate are screwed together by bolts, and the sealing plate is used to facilitate the later filling of slurry into the interior of the compensation cylinder, and a discharge port is provided at the bottom of the compensation cylinder, and a conical surface is provided at the connection between the discharge port and the compensation cylinder.

[0018] As a preferred embodiment of the present invention, a limit seat is installed on the side wall of the compensation cylinder, and a push rod is provided in the internal output connection of the limit seat. A top plate is installed on the top of the push rod, and a guide plate is installed on the bottom of the push rod. The surface of the guide plate is inclined, and a guide groove is provided on the guide plate. The guide groove corresponds to the discharge port, and a sealing groove is provided on the highest point of the guide groove, and the sealing groove is adapted to the discharge port, and the guide groove is used to guide the compensated slurry.

[0019] As a preferred embodiment of the present invention, the method for preparing an all-ceramic denture preform comprises the following steps:

[0020] Step 1: Inject ceramic slurry into the cavity of the denture mold, install the mold on the vibration plate, and close the cover so that the insert plate covers the slot;

[0021] Step 2: Start the vibration plate, the mold vibrates at high frequency to expel bubbles, and the compensation cylinder automatically replenishes the slurry reduced due to the expulsion of bubbles;

[0022] Step 3: After the vibration is finished, open the cover. When the mold moves to the highest point along with the vibration plate, the clamping rod is locked into the slot to fix the mold. The mold that is not positioned continues to vibrate.

[0023] Step 4: Without stopping the vibration plate, press the lever to release the positioning, remove the positioning plate and take out the mold;

[0024] Step 5: Solidify the slurry in the mold, remove the preform for grinding and polishing, and use it for tooth restoration after completing quality inspection. Clean the mold for next use.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention can effectively prevent ceramic slurry from splashing during the vibration process by providing a cover plate, avoid pollution of the working environment, and reduce cleaning costs and slurry waste; the clamping rod can ensure that the mold will not be positioned during vibration, and the precise positioning of a single mold can be achieved after the vibration is completed. There is no need to stop the vibration plate during disassembly, so as to avoid interruption of the vibration process of other molds due to the disassembly operation and ensure that the slurry density is not affected; and combined with the compensation cylinder, the slurry reduced due to the discharge of bubbles can be replenished in time to ensure that the slurry in all molds can be evenly dense, which significantly improves the preparation efficiency and product quality of all-ceramic denture preforms.

[0027] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In the attached figure:

[0029] Figure 1 A three-dimensional image of a mold prepared for an all-ceramic denture preform;

[0030] Figure 2 A top view of a mold being prepared for an all-ceramic denture preform;

[0031] Figure 3 Preparation of a mold for an all-ceramic denture preform Figure 2 Enlarged view of point A in the middle;

[0032] Figure 4 Side view of a mold being prepared for an all-ceramic denture preform;

[0033] Figure 5 A partial view of the mold being prepared for an all-ceramic denture preform;

[0034] Figure 6 A cross-sectional view of a positioning sleeve for preparing a mold for an all-ceramic denture preform;

[0035] Figure 7 A cross-sectional view of the cover plate of a mold for preparing an all-ceramic denture preform;

[0036] Figure 8 A cross-sectional view of the compensating cylinder of a mold for preparing an all-ceramic denture preform.

[0037] In the picture:

[0038] 1. Base; 11. Vibrating plate; 111. Support leg; 12. Bending frame; 121. Reinforcement rib; 122. Connecting plate; 13. Slide rail; 131. Limit rod; 132. Slider; 133. Limit spring; 134. Bolt;

[0039] 2. Denture mold; 21. Mold cavity; 211. Mold core; 22. Cover plate; 221. Positioning seat; 222. Positioning shaft; 223. Fixed seat; 23. Slide plate; 231. Slide rod; 232. Positioning plate; 233. Connecting seat;

[0040] 3. Positioning sleeve; 31. Clamping rod; 311. Clamping slot; 32. Baffle; 321. Return spring; 322. Sliding cavity; 33. Insert plate;

[0041] 4. Compensating cylinder; 41. Sealing plate; 411. Mounting plate; 42. Feeding port; 421. Conical surface; 43. Guide plate; 431. Guide groove; 432. Sealing groove; 44. Ejector rod; 441. Ejector plate; 442. Limit seat. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0043] Example 1:

[0044] like Figures 1 to 8 As shown, a mold for preparing an all-ceramic denture preform comprises a base 1 and a vibration plate 11 installed above the base 1 , on which a plurality of pairs of denture molds 2 are arranged.

[0045] A bending frame 12 is slidably mounted on the base 1, and the end of the bending frame 12 is vertically slidably connected to the denture mold 2 to limit the vibration direction of the denture mold 2; ensuring that the mold maintains a stable vertical direction during vibration to avoid affecting the slurry density due to offset.

[0046] A positioning sleeve 3 is mounted on the bending frame 12. A clamping rod 31 is inserted into the positioning sleeve 3. The clamping rod 31 corresponds to a clamping groove 311 provided on the side wall of the denture mold 2. When the denture mold 2 is moved to the highest point, the clamping rod 31 is clamped in the clamping groove 311 to position the denture mold 2.

[0047] A cover plate 22 is rotatably mounted on the denture mold 2 to prevent slurry from splashing during vibration. An insert plate 33 is mounted on the side wall of the cover plate 22 to cover the outside of the slot 311 to ensure that the denture mold 2 will not be positioned during vibration.

[0048] A compensation cylinder 4 is installed on the positioning sleeve 3. After the positioning sleeve 3 covers the denture mold 2, the outlet of the compensation cylinder 4 faces downward to compensate for the lack of slurry caused by vibration, ensuring that the slurry in the mold cavity 21 is always filled, thereby improving the molding quality of the denture preform.

[0049] like Figures 1 to 8 As shown, in a specific embodiment, a support leg 111 is installed at the bottom of the vibration plate 11, and the support leg 111 is connected to the surface of the base 1. This enhances the stability of the vibration plate installation and prevents shaking during vibration from affecting the vibration effect of the mold.

[0050] like Figures 1 to 8As shown, further, a plurality of pairs of slide rails 13 are provided on the base 1. A limit rod 131 is installed inside the slide rail 13. A slider 132 is slidably provided on the slide rail 13. The slider 132 and the limit rod 131 are movably connected. A limit spring 133 is sleeved on the outer wall of the limit rod 131. One end of the limit spring 133 is clamped on the slider 132, and the other end of the limit spring 133 is clamped on the side wall of the slide rail 13. A bolt 134 is screwed on the slider 132. The bolt 134 is used to lock the slider 132 and the base 1. The slider 132 is connected to the bending frame 12. Through the sliding cooperation between the slider 132 and the slide rail 13 and the buffering of the limit spring 133, the position of the bending frame 12 can be adjusted to meet the vibration requirements of different molds, maintain the consistency of the vibration direction of each mold, and avoid density differences caused by asynchronous vibration.

[0051] Example 2:

[0052] The difference between the above embodiment and this embodiment is that: Figures 1 to 8 As shown, a triangular reinforcing rib 121 is installed at the bend of the bending frame 12. A connecting plate 122 is installed at the end of the bending frame 12. A connecting seat 233 is installed on the side wall of the connecting plate 122. A sliding rod 231 is installed on the connecting seat 233. A slide plate 23 is slidably mounted on the slide rod 231. The side wall of the slide plate 23 is connected to the denture mold 2. A positioning plate 232 is installed on the top of the slide rod 231 via bolts. The positioning plate 232 is used to prevent the slide plate 23 and the slide rod 231 from disengaging. The triangular reinforcing rib 121 enhances the structural strength of the bending frame 12 and prevents structural damage caused by long-term vibration. The positioning plate 232 ensures the stability of the connection between the slide plate 23 and the slide rod 231, preventing the mold from falling off during vibration.

[0053] like Figures 1 to 8 As shown, in a specific embodiment, the denture mold 2 has a cavity 21 defined within it. The cavity 21 is inclined, and a core 211 adapted to the shape of the denture is located at the lowest point of the cavity 21. The inclined cavity 21 facilitates the expulsion of air bubbles along the cavity wall, and the core 211 conforms to the shape of the denture, ensuring the dimensional accuracy of the preform and improving the quality of the denture molding.

[0054] like Figures 1 to 8 As shown, the side wall of the cover plate 22 is further mounted with a positioning seat 221, a positioning shaft 222 is installed through the positioning seat 221, and a fixing seat 223 is rotatably mounted on the outer side wall of the positioning shaft 222. The fixing seat 223 is welded to the side wall of the denture mold 2. The rotational connection between the positioning shaft 222 and the fixing seat 223 enables the cover plate 22 to be flexibly flipped, facilitating opening and closing operations and improving user convenience.

[0055] Example 3:

[0056] The difference between the above embodiment and this embodiment is that: Figures 1 to 8 As shown, the positioning sleeve 3 has a sliding cavity 322 formed within it, within which a baffle 32 is slidably mounted. One end of the baffle 32 is connected to the latch rod 31, and the end of the latch rod 31 is chamfered. A return spring 321 is mounted on the other end of the latch rod 31, and the other end of the return spring 321 is engaged with the inner wall of the sliding cavity 322. The return spring 321 is compressed, and the compression direction of the return spring 321 and the movement direction of the latch rod 31 are aligned. The chamfered design facilitates the quick engagement of the latch rod 31 into the latch slot 311. The compressed state of the return spring 321 allows it to automatically pop out of position when the mold reaches its highest point. The baffle ensures the stability of the latch rod's sliding movement, preventing it from shifting during positioning.

[0057] like Figures 1 to 8 As shown, in a specific embodiment, a mounting plate 411 is provided on the top of the compensation cylinder 4, and a sealing plate 41 is mounted on the mounting plate 411. The sealing plate 41 and the mounting plate 411 are screwed together by bolts. The sealing plate 41 is used to facilitate the later filling of slurry into the compensation cylinder 4. A discharge port 42 is provided at the bottom of the compensation cylinder 4, and a tapered surface 421 is provided at the connection between the discharge port 42 and the compensation cylinder 4. The bolt connection of the sealing plate 41 facilitates the removal of the filling slurry, and the tapered surface 421 can accelerate the flow of the slurry, ensuring that the compensation slurry flows accurately and quickly into the mold cavity.

[0058] like Figures 1 to 8 As shown, the side wall of the compensation cylinder 4 is mounted with a limit seat 442. The output plug of the limit seat 442 is provided with a push rod 44. A top plate 441 is mounted on the top of the push rod 44. A guide plate 43 is mounted on the bottom of the push rod 44. The surface of the guide plate 43 is inclined. A guide groove 431 is formed on the guide plate 43. The guide groove 431 corresponds to the discharge port 42. A sealing groove 432 is provided at the highest point of the guide groove 431. The sealing groove 432 is adapted to the discharge port 42. The guide groove 431 is used to guide the compensating slurry. The inclined guide plate 43 cooperates with the guide groove 431 to guide the compensating slurry to evenly cover the detailed parts of the mold core 211.

[0059] The present invention also discloses a method for preparing an all-ceramic denture preform, which comprises the following steps:

[0060] Step 1: Inject ceramic slurry into the mold cavity 21 of the denture mold 2, install the mold on the vibration plate 11, close the cover plate 22 so that the insert plate 33 covers the card slot 311;

[0061] Step 2: Start the vibration plate 11, the mold vibrates at high frequency to expel bubbles, and the compensation cylinder 4 automatically replenishes the slurry reduced due to the expulsion of bubbles;

[0062] Step 3: After the vibration is finished, the cover plate 22 is opened. When the mold moves to the highest point along with the vibration plate 11, the clamping rod 31 is clamped into the clamping slot 311 to fix the mold. The mold that is not positioned continues to vibrate.

[0063] Step 4: Without stopping the vibration plate 11, press the clamping rod 31 to release the positioning, remove the positioning plate 232 and take out the mold;

[0064] Step 5: Solidify the slurry in the mold, remove the preform for grinding and polishing, and use it for tooth restoration after completing quality inspection. Clean the mold for next use.

[0065] The implementation principle of the mold for preparing an all-ceramic denture preform of the present invention is as follows:

[0066] The operator first injects the prepared ceramic slurry into the mold cavity 21 of the denture mold 2. The mold cavity 21 is designed to be inclined and has a mold core 211 that matches the shape of the denture at the lowest point, which helps to discharge bubbles when the slurry is filled. The denture mold 2 filled with slurry is then slid and installed along the slide bar 231 so that the bottom of the mold fits tightly against the surface of the vibration disk 11. At this time, the slide 23 and the slide bar 231 form a vertical sliding connection to provide guidance for the up and down vibration of the mold. Then flip the cover plate 22, and the cover plate covers the outside of the mold through the rotation connection between the positioning shaft 222 and the fixed seat 223. The insert plate 33 on the side wall of the cover plate 22 synchronously covers the outside of the card groove 311 on the side wall of the mold to prevent the card rod 31 from accidentally getting stuck during vibration. After flipping, the discharge port 42 of the compensation cylinder 4 faces downward, and the guide plate 43 moves downward under the action of gravity, and the guide groove 431 on its surface is aligned with the mold cavity 21.

[0067] After the vibration plate 11 is activated, it drives the denture mold 2 to vibrate at high frequency. The sliding rod 231 at the end of the bending frame 12 cooperates with the slide plate 23 to ensure stable vertical vibration of the mold and prevent deviation. During this process, the bending frame 12 can slide on the slide rail 13 of the base 1 via the slider 132, and cooperate with the buffering effect of the limit rod 131 and the limit spring 133 to adjust the vibration position and maintain the consistency of the vibration direction of each mold. During the vibration process, the slurry in the mold cavity 21 is evenly distributed under the action of the vibration force, and bubbles are discharged upward along the inclined mold cavity wall. At the same time, the cover plate 22 effectively prevents slurry splashing. When the slurry volume in the mold cavity 21 decreases due to the discharge of bubbles, the slurry in the compensation cylinder 4 is accelerated by gravity through the tapered surface 421 at the connection between the discharge port 42 and the compensation cylinder 4, pushing open the sealing groove 432 and accurately flowing into the mold cavity 21 along the guide groove 431, replenishing the missing slurry. The inclined surface of the guide groove 431 guides the slurry to evenly cover the detailed parts of the mold core 211.

[0068] After the vibration is completed, the operator flips the cover plate 22 to separate it from the mold, and the insert plate 33 is removed, exposing the card slot 311. At this time, the denture mold 2 continues to reciprocate up and down with the vibration disk 11. When the mold slides to the highest point, the clamping rod 31 in the positioning sleeve 3 is ejected from the slide cavity 322 under the elastic force of the reset spring 321 (the reset spring 321 is always in a compressed state), and its chamfered end is precisely engaged in the card slot 311, fixing the mold at the highest point. At this time, the baffle 32 moves synchronously in the slide cavity 322 to ensure the stable engagement of the clamping rod 31. The positioned mold stops vibrating, and the unpositioned mold continues to vibrate through the sliding connection between the slide rod 231 and the slide plate 23, ensuring that the slurry in all molds remains dense.

[0069] When it is necessary to remove the positioned mold, the operator does not need to stop the vibration plate 11. First, manually press the clamping rod 31 to retract it into the sliding cavity 322. After releasing the positioning, loosen the bolts at the top of the sliding rod 231, remove the positioning plate 232, and then lift the mold upward to separate it from the slide plate 23 along the sliding rod 231. The positioning plate 232 serves as a limit structure at the top of the sliding rod 231. It is fixed by bolts during the vibration process to prevent the slide plate 23 from detaching. When removing the mold, the positioning plate 232 must be disassembled before removing the mold.

[0070] During the entire disassembly process, the vibration plate 11 continues to work, and the unpositioned mold still maintains vibration through the sliding connection between the slide rod 231 and the slide plate 23, which not only ensures the density of the remaining slurry, but also realizes the rapid separation of the formed mold, avoiding the overall vibration interruption caused by shutdown in traditional processes, and significantly improving the preparation efficiency.

[0071] After disassembly, the removed denture mold 2 is transferred to a curing device, where the ceramic slurry in the mold cavity 21 is subjected to high-temperature curing treatment, forming the slurry into an all-ceramic denture preform. After curing, the denture mold 2 is opened, and the preform is carefully removed. It undergoes fine processing such as grinding and polishing to ensure that the dimensional accuracy and surface finish of the denture meet clinical standards. Subsequently, the denture preform undergoes quality inspection, including dimensional measurement, strength testing, and biocompatibility testing. Once qualified, the all-ceramic denture can be used for the patient's tooth restoration.

Claims

1. A mold for preparing an all-ceramic denture preform, comprising a base (1) and a vibration plate (11) mounted above the base (1), wherein a plurality of pairs of denture molds (2) are arranged on the vibration plate (11), characterized in that: A bending frame (12) is slidably mounted on the base (1), and the end of the bending frame (12) is vertically slidably connected to the denture mold (2) for limiting the vibration direction of the denture mold (2); A positioning sleeve (3) is installed on the bending frame (12), and a clamping rod (31) is inserted into the interior of the positioning sleeve (3), and the clamping rod (31) corresponds to a clamping groove (311) provided on the side wall of the denture mold (2). After the denture mold (2) moves to the highest point, the clamping rod (31) is clamped on the clamping groove (311) to position the denture mold (2); A cover plate (22) is rotatably mounted on the denture mold (2), and the cover plate (22) is used to prevent slurry from splashing during vibration. A plug plate (33) is mounted on the side wall of the cover plate (22), and the plug plate (33) covers the outside of the slot (311) to ensure that the denture mold (2) will not be positioned during vibration. A compensation cylinder (4) is installed on the positioning sleeve (3). After the positioning sleeve (3) covers the denture mold (2), the outlet of the compensation cylinder (4) faces downward, which is used to compensate for the lack of slurry due to vibration.

2. The mold for preparing an all-ceramic denture preform according to claim 1, characterized in that: Support legs (111) are installed at the bottom of the vibration plate (11), and the support legs (111) are connected to the surface of the base (1).

3. The mold for preparing an all-ceramic denture preform according to claim 1, characterized in that: The base (1) is provided with a plurality of pairs of slide rails (13), a limiting rod (131) is installed inside the slide rail (13), a slider (132) is slidably provided on the slide rail (13), the slider (132) and the limiting rod (131) are movably passed through, a limiting spring (133) is sleeved on the outer wall of the limiting rod (131), one end of the limiting spring (133) is clamped on the slider (132), and the other end of the limiting spring (133) is clamped on the side wall of the slide rail (13), a bolt (134) is screwed on the slider (132), the bolt (134) is used to lock the slider (132) and the base (1), and the slider (132) is connected to the bending frame (12).

4. The mold for preparing an all-ceramic denture preform according to claim 1, characterized in that: A reinforcing rib (121) is installed at the bend of the bending frame (12), and the reinforcing rib (121) is triangular. A connecting plate (122) is installed at the end of the bending frame (12), and a connecting seat (233) is installed on the side wall of the connecting plate (122). A sliding rod (231) is installed on the connecting seat (233), and a slide plate (23) is slidably provided on the slide rod (231). The side wall of the slide plate (23) is connected to the denture mold (2), and a positioning plate (232) is installed on the top of the slide rod (231) by bolts. The positioning plate (232) is used to prevent the slide plate (23) and the slide rod (231) from being disengaged.

5. The mold for preparing an all-ceramic denture preform according to claim 1, characterized in that: A mold cavity (21) is provided inside the denture mold (2), the mold cavity (21) is in an inclined state, and a mold core (211) adapted to the shape of the denture is provided at the lowest point of the mold cavity (21).

6. The mold for preparing an all-ceramic denture preform according to claim 1, characterized in that: A positioning seat (221) is installed on the side wall of the cover plate (22), a positioning shaft (222) is installed through the positioning seat (221), a fixing seat (223) is rotatably installed on the outer side wall of the positioning shaft (222), and the fixing seat (223) is welded to the side wall of the denture mold (2).

7. The mold for preparing an all-ceramic denture preform according to claim 1, characterized in that: A sliding cavity (322) is provided inside the positioning sleeve (3), and a baffle (32) is slidably provided inside the sliding cavity (322). One end of the baffle (32) is connected to the clamping rod (31), and the end of the clamping rod (31) is chamfered. A return spring (321) is installed at the other end of the clamping rod (31), and the other end of the return spring (321) is clamped on the inner wall of the sliding cavity (322). The return spring (321) is in a compressed state, and the compression direction of the return spring (321) and the moving direction of the clamping rod (31) are both on the same straight line.

8. The mold for preparing an all-ceramic denture preform according to claim 1, characterized in that: A mounting plate (411) is provided on the top of the compensation cylinder (4), a sealing plate (41) is installed on the mounting plate (411), the sealing plate (41) and the mounting plate (411) are screwed together by bolts, the sealing plate (41) is used to facilitate the later filling of slurry into the interior of the compensation cylinder (4), a discharge port (42) is provided at the bottom of the compensation cylinder (4), and a conical surface (421) is provided at the connection between the discharge port (42) and the compensation cylinder (4).

9. The mold for preparing an all-ceramic denture preform according to claim 1, characterized in that: A limiting seat (442) is installed on the side wall of the compensation cylinder (4), an output plug is provided inside the limiting seat (442), a top plate (441) is installed on the top of the top rod (44), a guide plate (43) is installed on the bottom of the top rod (44), the surface of the guide plate (43) is in an inclined state, a guide groove (431) is provided on the guide plate (43), the guide groove (431) corresponds to the discharge port (42), and a sealing groove (432) is provided at the highest point of the guide groove (431), and the sealing groove (432) is adapted to the discharge port (42), and the guide groove (431) is used to guide the compensated slurry.

10. A method for preparing an all-ceramic denture preform, characterized in that: The mold for preparing an all-ceramic denture preform according to any one of claims 1 to 9 is applied to a method for preparing an all-ceramic denture preform, comprising the following steps: Step 1: injecting ceramic slurry into the mold cavity (21) of the denture mold (2), installing the mold on the vibration plate (11), closing the cover plate (22) so that the insert plate (33) covers the card slot (311); Step 2: Start the vibration plate (11), the mold vibrates at a high frequency to expel bubbles, and the compensation cylinder (4) automatically replenishes the slurry reduced due to the expulsion of bubbles; Step 3: After the vibration is finished, the cover plate (22) is opened, and when the mold moves to the highest point along with the vibration plate (11), the clamping rod (31) is clamped into the clamping groove (311) to fix the mold, and the mold that is not positioned continues to vibrate; Step 4: Without stopping the vibration plate (11), press the clamping rod (31) to release the positioning, remove the positioning plate (232) and then remove the mold; Step 5: Solidify the slurry in the mold, remove the preform for grinding and polishing, and use it for tooth restoration after completing quality inspection. Clean the mold for next use.

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