Powder spreading device of zirconia ceramic block dry press for all-ceramic false tooth

Abstract

The invention discloses a powder spreading device of a zirconia porcelain block dry press for all-porcelain false teeth, the dry press comprises an extrusion head and an extrusion platform which are oppositely arranged, the extrusion platform is provided with a powder pressing groove, and the extrusion head can move towards or away from the powder pressing groove and is used for pressing a zirconia porcelain block; the powder spreading device comprises a base, a lifting sliding rail, a transverse moving sliding rail, a first driving part, a sliding seat, a second driving part and a spreading assembly, one side of the base is connected with the extrusion platform, and the other side of the base extends out of the extrusion platform and is provided with the lifting sliding rail; the transverse moving sliding rail is arranged on the lifting sliding rail in a sliding mode. The sliding direction of the transverse sliding rail is parallel to the moving direction of the extrusion head; the first driving piece is arranged on the lifting sliding rail and is in transmission connection with the transverse moving sliding rail; the sliding seat is slidably arranged on the transverse moving sliding rail, and the sliding direction of the sliding seat is perpendicular to the moving direction of the extrusion head; the second driving piece is arranged on the transverse moving sliding rail and is in transmission connection with the sliding seat; the tiling assembly is arranged on the sliding base and used for stretching into the powder pressing groove to tiling the powder.

Description

Technical Field

[0001] The present invention relates to the technical field of denture forming equipment, and particularly to a powder spreading device for a zirconia ceramic block dry press for all-ceramic dentures. Background Art

[0002] Zirconia all-ceramic teeth are artificial dentures sintered at high temperature from zirconia powder. Zirconia all-ceramic teeth have many advantages such as being firm and wear-resistant, having a lifelike appearance color, and good biocompatibility. Moreover, since they do not contain metal, they do not irritate the gums and do not cause allergic reactions, so the use of zirconia all-ceramic dentures is becoming more and more widespread. Generally, the denture forming process is to first dry-press the zirconia powder and then sinter it into shape. When the dry press operates, it is necessary to first put the zirconia powder into the mold and then extrude it into a ceramic block. For example, the prior art with the patent publication number CN204819861U discloses "a pre-pressing and forming device for zirconia ceramic blocks for oral restoration", which pre-presses the powder placed in the mold with a large pressure by setting a lower pressing head, a flattening body and a mold.

[0003] Since the zirconia material has a certain toughness and the hardness of ceramics, it needs to be evenly spread in the mold before being extruded, otherwise the force will be uneven, the ceramic block will be abnormal and cannot be formed. However, in the existing production process, manual scraping is often used, and the uniformity of spreading cannot be guaranteed, resulting in different extrusion degrees and weights of the final products, and the quality of the products is unstable.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the Invention

[0005] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a powder spreading device for a zirconia ceramic block dry press for all-ceramic dentures, aiming to solve the problem that the quality of the product is unstable due to manual leveling when the existing dry press presses the zirconia ceramic block.

[0006] The technical solution of the present invention is as follows:

[0007] A powder spreading device for a zirconia ceramic block dry press for all-ceramic dentures, wherein the zirconia ceramic block dry press for all-ceramic dentures includes an extrusion head and an extrusion platform arranged opposite to each other, a powder pressing groove is arranged on the extrusion platform, and the extrusion head can move towards or away from the powder pressing groove for pressing the zirconia ceramic block; the powder spreading device includes:

[0008] A base, one side of which is connected to the extrusion platform, and the other side extends out of the extrusion platform and is provided with a lifting slide rail;

[0009] A transverse slide rail, which is slidably arranged on the lifting slide rail; the sliding direction of the transverse slide rail is parallel to the moving direction of the extrusion head;

[0010] A first driving member, which is arranged on the lifting slide rail and is in transmission connection with the transverse slide rail;

[0011] A sliding seat, which is slidably arranged on the transverse slide rail and can slide upward towards the powder pressing groove; the sliding direction of the sliding seat is perpendicular to the moving direction of the extrusion head;

[0012] A second driving member, which is arranged on the transverse slide rail and is in transmission connection with the sliding seat; and

[0013] A paving assembly, which is arranged on the sliding seat and is used to extend into the powder pressing groove to pave the powder.

[0014] For the powder paving device of the zirconia ceramic block dry press for all-ceramic dentures, wherein a boss and a supporting step surrounding the boss are arranged on the top of the extrusion platform, and the powder pressing groove is located at the center of the boss; the base includes:

[0015] A bottom plate, which is nested on the supporting step; an assembly hole is arranged on the bottom plate, and the assembly hole is adapted to the boss;

[0016] A fixing plate, which is connected to the bottom plate; the fixing plate is perpendicularly arranged with respect to the bottom plate; the lifting slide rail is arranged along the side surface of the fixing plate.

[0017] For the powder paving device of the zirconia ceramic block dry press for all-ceramic dentures, wherein a plurality of connecting holes are arranged on one side of the bottom plate away from the assembly hole; the fixing plate includes a first connecting portion, a supporting portion and a second connecting portion, and a plurality of mounting holes are arranged on the first connecting portion; the mounting holes are arranged opposite to the connecting holes, and the first connecting portion is fixed by inserting bolts into the connecting holes and the mounting holes; the shape of the supporting portion is triangular, one right-angled side of the supporting portion is connected to the first connecting portion, and the other right-angled side is perpendicularly arranged with respect to the bottom plate and is provided with the second connecting portion; the lifting slide rail is arranged on the side surface of the second connecting portion.

[0018] For the powder paving device of the zirconia ceramic block dry press for all-ceramic dentures, wherein the base includes a reinforcing plate, the shape of the reinforcing plate is triangular, one right-angled side of the reinforcing plate is connected to the first connecting portion, and the other right-angled side is connected to the supporting portion.

[0019] For the powder paving device of the zirconia ceramic block dry press for all-ceramic dentures, wherein the bottom plate is welded to the supporting step.

[0020] For the powder paving device of the zirconia ceramic block dry press for all-ceramic dentures, wherein the depth value of the powder pressing groove is less than or equal to the sliding stroke of the transverse slide rail.

[0021] The powder spreading device of the zirconia ceramic block dry press for all-ceramic dentures, wherein the paving assembly comprises:

[0022] A driving motor, provided on the sliding seat;

[0023] A rotating connecting rod, connected to the output shaft of the driving motor;

[0024] A powder spreading plate, connected to the rotating connecting rod;

[0025] Wherein, the driving motor, the rotating connecting rod and the powder spreading plate are arranged in a first direction, and the first direction is the same as the depth direction of the powder pressing groove.

[0026] The powder spreading device of the zirconia ceramic block dry press for all-ceramic dentures, wherein the width of the powder spreading plate is equal to the diameter of the powder pressing groove.

[0027] The powder spreading device of the zirconia ceramic block dry press for all-ceramic dentures, wherein at least two openings arranged in the first direction are provided on the center line of the powder spreading plate, an assembly step is provided at one end of the rotating connecting rod away from the driving motor, and a fixing groove is provided at a position on the assembly step opposite to the opening; the powder spreading plate is fixed by inserting a pin into the opening and the fixing groove.

[0028] The powder spreading device of the zirconia ceramic block dry press for all-ceramic dentures, wherein the first driving member is a stepping motor; and / or, the second driving member is a stepping motor.

[0029] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0030] In the present application, the disclosed powder spreading device is fixed on the dry press. When the dry press works, first separate the extrusion head and the extrusion platform, open the powder pressing groove, pour the weighed zirconia powder into the powder pressing groove, and then start the second driving member to drive the sliding seat to move upward above the powder pressing groove until the paving assembly is directly opposite to the opening of the powder pressing groove. Then start the first driving member to drive the transverse sliding rail to move downward. At this time, the sliding seat and the paving assembly move downward synchronously, and the paving assembly enters the powder pressing groove. Then, the paving assembly starts to level the zirconia powder in the powder pressing groove. Finally, the paving assembly returns along the original path, the sliding seat moves in the reverse direction, and the extrusion head is driven to approach the extrusion platform for pressing processing. It can be seen that by setting the powder spreading device in the present application, manual work can be replaced to achieve the effect of automatically leveling the zirconia powder, thereby improving the production quality of the product. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of a dry press for zirconia ceramic blocks for all-ceramic dentures in the present invention;

[0033] Figure 2 It is an exploded structural view of a dry press for zirconia ceramic blocks for all-ceramic dentures in the present invention;

[0034] Figure 3 It is a schematic structural diagram of a powder spreading device of a dry press for zirconia ceramic blocks for all-ceramic dentures in the present invention;

[0035] Figure 4 It is an exploded structural view of a powder spreading device of a dry press for zirconia ceramic blocks for all-ceramic dentures in the present invention;

[0036] Figure 5 It is a schematic structural diagram of a flat laying component in the present invention.

[0037] Among them, 10, extrusion head; 20, extrusion platform; 21, powder pressing groove; 22, convex platform; 23, support step; 30, powder spreading device; 31, base; 311, bottom plate; 3111, assembly hole; 3112, connection hole; 312, fixing plate; 3121, first connection part; 3122, support part; 3123, second connection part; 313, reinforcement plate; 32, lifting slide rail; 33, transverse slide rail; 34, first driving part; 35, sliding seat; 36, second driving part; 37, flat laying component; 371, driving motor; 372, rotating connecting rod; 3721, assembly step; 3722, fixing groove; 373, powder spreading plate; 3731, opening. Detailed implementation manners

[0038] In order to enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0040] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0041] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or parts, these components, elements, regions, layers, or parts are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or part from another. Thus, a first component, element, region, layer, or part as referred to in the examples described herein may also be referred to as a second component, element, region, layer, or part without departing from the teachings of the examples.

[0042] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the drawings. Such spatial relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways and the spatial relationship terms used herein will be interpreted accordingly.

[0043] The terms used herein are only for describing various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprises", "comprising", and "having" enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0044] In the process of producing zirconia ceramic blocks for all-ceramic dentures, it is necessary to lay flat the raw material powder of the refined designed ceramic block products, apply force with a dry press, and extrude evenly to obtain a zirconia ceramic block blank with a target density. In order to improve the processing accuracy, it is necessary to keep the weight of each ceramic block as consistent as possible, with an error within 0.5 g / block. According to the usage requirements, the weights of different types of ceramic blocks vary from 100 to 900 grams. Moreover, the powder must be evenly laid flat in the mold before being extruded, otherwise there will be uneven stress, abnormal ceramic blocks, and inability to form. In addition, there is also the case of single-piece multi-layer, and it is necessary to manufacture multi-layer pressed zirconia ceramic blocks, and each layer needs to be evenly laid flat, otherwise there will be product quality problems.

[0045] In the current production process, manual scraping and spreading of powder is adopted. The work process is as follows: adjust the mold to the appropriate position; pour in the weighed zirconia powder; use a ruler and the position of the mold opening to manually scrape all the powder into the mold and scrape it flat; repeat the above operations according to the required number of layers. The main disadvantage of this operation method is insufficient stability, relying entirely on manual judgment, which is time-consuming and laborious.

[0046] Another way of spreading is to use a prefabricated chamber for powder filling, mechanically spread it, and then put it into a dry press. The work process is as follows: the filled zirconia powder is sent to the plane of the mold opening through a powder feeding device, the position of the mold is adjusted, and a sufficient amount of powder is scraped flat into the mold at one time; the excess powder is scraped back to its original place for the next use. The disadvantage of this operation method is that the degree of extrusion between powders is different, and the weight control of a single layer of powder is inaccurate, resulting in a large final weight error of the product and unstable product quality. Therefore, it is only limited to the production of single-layer zirconia ceramic blocks.

[0047] Refer to Figure 1 , in an embodiment of the present invention application, a powder spreading device 30 for a dry press of zirconia ceramic blocks for all-ceramic dentures is disclosed. The dry press of zirconia ceramic blocks for all-ceramic dentures includes an extrusion head 10 and an extrusion platform 20 arranged oppositely. A powder pressing groove 21 is arranged on the extrusion platform 20. The extrusion head 10 can move towards or away from the powder pressing groove 21 for pressing zirconia ceramic blocks.

[0048] In this embodiment, the disclosed extrusion head 10 extends into the powder pressing groove 21 to press the zirconia powder into zirconia ceramic blocks, thereby realizing the manufacture of zirconia ceramic blocks for all-ceramic dentures. Before processing, the extrusion platform 20 and the extrusion head 10 are longitudinally arranged, and the two can be limited by multiple guide rods to achieve coaxial setting, so that the stability is higher when the extrusion head 10 and the extrusion platform 20 approach each other, and the extrusion head 10 is accurately aligned with the powder pressing groove 21, reducing the problem of deviation.

[0049] Such as Figure 1 、 Figure 2 And Figure 3As shown in the figure, the powder spreading device 30 includes a base 31, a lifting slide rail 32, a transverse slide rail 33, a first driving member 34, a sliding seat 35, a second driving member 36 and a powder spreading assembly 37. One side of the base 31 is connected to the extrusion platform 20, and the other side extends out of the extrusion platform 20 and is provided with the lifting slide rail 32; the transverse slide rail 33 is slidably arranged on the lifting slide rail 32; the sliding direction of the transverse slide rail 33 is parallel to the moving direction of the extrusion head 10; the first driving member 34 is arranged on the lifting slide rail 32 and is in transmission connection with the transverse slide rail 33; the sliding seat 35 is slidably arranged on the transverse slide rail 33 and can slide upward toward the upper part of the powder pressing groove 21; the sliding direction of the sliding seat 35 is perpendicular to the moving direction of the extrusion head 10; the second driving member 36 is arranged on the transverse slide rail 33 and is in transmission connection with the sliding seat 35; the powder spreading assembly 37 is arranged on the sliding seat 35 and is used for extending into the powder pressing groove 21 to spread the powder.

[0050] In this embodiment, the powder spreading device 30 disclosed is fixed on a dry press. When the dry press works, first separate the extrusion head 10 and the extrusion platform 20, open the powder pressing groove 21, pour the weighed zirconia powder into the powder pressing groove 21, then start the second driving member 36 to drive the sliding seat 35 to move upward toward the upper part of the powder pressing groove 21 until the powder spreading assembly 37 is directly opposite to the opening of the powder pressing groove 21. Then start the first driving member 34 to drive the transverse slide rail 33 to move downward. At this time, the sliding seat 35 and the powder spreading assembly 37 move downward synchronously, and the powder spreading assembly 37 enters the powder pressing groove 21. Then, the powder spreading assembly 37 starts to spread the zirconia powder in the powder pressing groove 21 flat. Finally, the powder spreading assembly 37 returns along the original path, the sliding seat 35 moves in the reverse direction, and the extrusion head 10 is driven to approach the extrusion platform 20 for pressing processing.

[0051] In summary, by setting the powder spreading device 30 in this embodiment, it can replace manual labor to achieve the effect of automatically spreading the zirconia powder flat, thereby improving the production quality of the product.

[0052] As Figure 2 and Figure 3 shown, as another embodiment of the present application, a boss 22 and a supporting step 23 surrounding the boss 22 are provided on the top of the extrusion platform 20, and the powder pressing groove 21 is located at the center of the boss 22; the base 31 includes a bottom plate 311 and a fixing plate 312, the bottom plate 311 is nested on the supporting step 23; an assembly hole 3111 is provided on the bottom plate 311, and the assembly hole 3111 is adapted to the boss 22; the fixing plate 312 is connected to the bottom plate 311; the fixing plate 312 is perpendicular to the bottom plate 311; the lifting slide rail 32 is arranged along the side surface of the fixing plate 312.

[0053] The assembly hole 3111 disclosed in this embodiment cooperates with the boss 22, the bottom plate 311 is nested on the support step 23, and remains stable. When the thickness of the bottom plate 311 is the same as the height of the support step 23, the top surface of the bottom plate 311 is flush with the top surface of the boss 22, and the bottom plate 311 can remain horizontal and extend horizontally to the side of the extrusion platform 20. At the same time, the fixed plate 312 is vertically arranged with the bottom plate 311, and is in a vertical state. The lifting rail 32 arranged on the side of the fixed plate 312 is also in a vertical state, suspended on the side of the extrusion platform 20. In other words, by setting the bottom plate 311 and the fixed plate 312, the lifting rail 32 can be supported to stand vertically on the side of the extrusion platform 20, so that when the transverse slide 33 moves on the lifting slide 32, it can move in the vertical direction without deviation. The transverse slide 33, the sliding seat 35 and the tiling assembly 37 are interconnected, so that the effect of controlling the lifting and lowering of the tiling assembly 37 can be achieved.

[0054] Specifically, the bottom plate 311 disclosed in this embodiment serves as a supporting structure for the fixed plate 312, the lifting rail 32, the transverse rail 33, the sliding seat 35 and the paving assembly 37, and has high load-bearing requirements. Therefore, the bottom plate 311 can be made of a metal material with high hardness, such as stainless steel, tungsten steel or manganese steel. Moreover, in one embodiment of this embodiment, the bottom plate 311 is welded to the supporting step 23. The connection strength between the bottom plate 311 and the supporting step 23 is further increased by welding, so that the bottom plate 311 remains stable, and the service life of the powder spreading device 30 is extended.

[0055] Specifically, in another implementation disclosed in this embodiment, the bottom plate 311 can also be integrally formed with the extrusion platform 20 to reduce the assembly process and further improve the overall structural stability of the dry press.

[0056] like Figure 3 and Figure 4 As shown, as another embodiment of the present application, it is disclosed that a plurality of connecting holes 3112 are provided on the side of the base plate 311 away from the assembly hole 3111; the fixing plate 312 includes a first connecting portion 3121, a supporting portion 3122 and a second connecting portion 3123, and a plurality of mounting holes are provided on the first connecting portion 3121; the mounting hole is arranged opposite to the connecting hole 3112, and the connecting hole 3112 and the mounting hole are plugged by bolts to fix the first connecting portion 3121; the supporting portion 3122 is in the shape of a triangle, a right-angled side of the supporting portion 3122 is connected to the first connecting portion 3121, and the other right-angled side is perpendicularly arranged to the base plate 311 and is provided with the second connecting portion 3123; the lifting rail 32 is arranged on the side of the second connecting portion 3123.

[0057] In this embodiment, the first connecting portion 3121 disclosed is connected to the bottom plate 311 by bolts, with firm connection, not easy to loosen, and long service life. In an implementation manner of this embodiment, a plurality of connecting holes 3112 can be arranged in an array on the bottom plate 311, and various connecting holes 3112 with different sizes can be set to increase the adaptability, facilitate the flexible setting of the fixing plate 312 with different sizes, so as to play the role of flexibly disassembling and assembling the powder spreading device 30, and facilitating maintenance and replacement.

[0058] It should be noted that in this embodiment, only an example is given that the first connecting portion 3121 and the bottom plate 311 are connected by bolts, but the protection scope of the present invention is not limited thereto. Other types of connection methods, such as welding, clamping, etc., as long as they can achieve the technical effects disclosed in this application and are equivalent replacements of the concept of the present invention, should also be within the protection scope of this application.

[0059] Specifically, in this embodiment, the supporting portion 3122 is vertically arranged on the first connecting portion 3121, and the second connecting portion 3123 is arranged on the other right-angled side, playing a role of connection and transition. The lifting slide rail 32 is connected to the second connecting portion 3123, so a load is generated. The shape of the supporting portion 3122 is set as a triangle, increasing its own stability and having excellent load-bearing capacity. Therefore, it is beneficial to carry the second connecting portion 3123 and the lifting slide rail 32 for a long time and avoid fracture.

[0060] In another implementation manner of this embodiment, the first connecting portion 3121 is arranged at the end of the bottom plate 311. The right-angled side of the supporting portion 3122 perpendicular to the bottom plate 311 is flush with the side surface of the bottom plate 311, and the second connecting portion 3123 is arranged on the side surface of the bottom plate 311. Therefore, the lifting slide rail 32 is suspended and fixed on the side surface of the bottom plate 311. A first driving member 34 can be arranged at the top or bottom of the lifting slide rail 32, with high flexibility in structural design and reasonable space utilization.

[0061] Specifically, in this embodiment, the supporting portion 3122 is vertically arranged with the first connecting portion 3121, and the second connecting portion 3123 is in the same plane as the supporting portion 3122. Therefore, the entire fixing plate 312 can be separately manufactured for these three parts and then welded together; it can also be integrally formed by casting, or formed by bending sheet metal.

[0062] As Figure 4 shown, as another embodiment of this application, it is disclosed that the base 31 includes a reinforcing plate 313. The shape of the reinforcing plate 313 is triangular. One right-angled side of the reinforcing plate 313 is connected to the first connecting portion 3121, and the other right-angled side is connected to the supporting portion 3122.

[0063] In this embodiment, the first connecting portion 3121 and the supporting portion 3122 disclosed are perpendicular to each other. By providing the reinforcing plate 313, the firmness of the connection between the two is further increased. Supported by the reinforcing plate 313, the supporting portion 3122 is maintained in a state perpendicular to the bottom plate 311, and the structure is kept stable.

[0064] In addition, the shape of the reinforcing plate 313 is triangular. The stability of the triangle is utilized to make the structure of the reinforcing plate 313 stable and increase its load-bearing capacity.

[0065] In one implementation manner of this embodiment, it is disclosed that the reinforcing plate 313 and the fixing plate 312 can be connected by welding. The bottom plate 311, the fixing plate 312, and the reinforcing plate 313 can be welded into one body, and the overall structure is stable.

[0066] Specifically, in this embodiment, one side of the bottom plate 311 is connected to the extrusion platform 20, and the other side is suspended. Moreover, the suspended side is connected to the fixing plate 312. Therefore, both the fixing plate 312 and the reinforcing plate 313 become the load of the bottom plate 311. By setting the supporting portion 3122 to be triangular and the reinforcing plate 313 to be triangular, the weight of the structure can be reduced, the load on the bottom plate 311 can be decreased, and the stability of the structure can be further improved and the service life can be extended.

[0067] Specifically, as another embodiment of this application, it is disclosed that the depth value of the powder pressing groove 21 is less than or equal to the sliding stroke of the transverse sliding rail 33. By moving the transverse sliding rail 33, the paving assembly 37 can be driven to lift, and the lifting stroke is greater than or equal to the depth value of the powder pressing groove 21, so that in the extreme state, the paving assembly 37 can be extended into the bottom plate 311 of the powder pressing groove 21 for paving processing, and at the same time, the paving assembly 37 can be completely lifted above the powder pressing groove 21 for lateral removal for subsequent processing operations.

[0068] As Figure 4 and Figure 5 shown, as another embodiment of this application, it is disclosed that the paving assembly 37 includes a driving motor 371, a rotating connecting rod 372, and a powder spreading plate 373. The driving motor 371 is arranged on the sliding seat 35; the rotating connecting rod 372 is connected to the output shaft of the driving motor 371; the powder spreading plate 373 is connected to the rotating connecting rod 372; the driving motor 371, the rotating connecting rod 372, and the powder spreading plate 373 are arranged in the first direction, and the first direction is the same as the depth direction of the powder pressing groove 21.

[0069] The driving motor 371 disclosed in this embodiment includes but is not limited to a stepping motor, a DC motor, etc. By driving the driving motor 371 to drive the rotating connecting rod 372 to rotate, the powder spreading plate 373 is driven to rotate, so that the zirconia powder in the powder pressing groove 21 can be pushed and spread flat, facilitating the pressing into a zirconia ceramic block.

[0070] Specifically, in this embodiment, the driving motor 371 is fixed on the sliding seat 35, the output shaft is vertically downward and connected to the rotating link 372. The rotating link 372 is vertically arranged and connected to the powder spreading plate 373. Therefore, the entire powder spreading assembly 37 is linearly arranged, and the extending direction is the first direction, that is, the vertical direction. In this embodiment, in order to facilitate the extrusion head 10 to extrude the zirconia powder and to make a zirconia ceramic block with a uniform thickness, the powder pressing groove 21 is set as a groove with a vertically opened hole 3731, so it is the same as the first direction. On this basis, the powder spreading assembly 37 can smoothly enter the powder pressing groove 21, reducing the frictional collision with the side wall of the powder pressing groove 21.

[0071] Specifically, as another embodiment of the present application, it is disclosed that the width of the powder spreading plate 373 is equal to the caliber of the powder pressing groove 21. In this embodiment, the area that the powder spreading plate 373 can cover during rotation is determined by the width of the powder spreading plate 373. Therefore, when the width of the powder spreading plate 373 is equal to the caliber of the powder pressing groove 21, the entire cross-section of the powder pressing groove 21 can be covered during rotation, so as to sweep the zirconia powder on the entire cross-section, realizing a complete paving operation and reducing the situation of local unevenness.

[0072] As Figure 5 shown, as another embodiment of the present application, it is disclosed that at least two openings 3731 arranged along the first direction are provided on the center line of the powder spreading plate 373. An assembly step 3721 is provided at one end of the rotating link 372 away from the driving motor 371, and a fixing groove 3722 is provided at a position on the assembly step 3721 opposite to the opening 3731; the powder spreading plate 373 is fixed by inserting a pin into the opening 3731 and the fixing groove 3722.

[0073] In this embodiment, the powder spreading plate 373 contacts the zirconia powder and pushes the zirconia powder to be paved. During long-term use, surface wear will occur, affecting the paving effect. Therefore, it is set that the powder spreading plate 373 and the rotating link 372 are detachably connected by a pin, so as to facilitate timely replacement or maintenance of the powder spreading plate 373 and maintain a stable and effective powder spreading effect.

[0074] Specifically, as another embodiment of the present application, it is disclosed that the first driving member 34 is a stepping motor; or, the second driving member 36 is a stepping motor; or both the first driving member 34 and the second driving member 36 are stepping motors. In this embodiment, a stepping motor is used to control the movement of the transverse sliding rail 33 and the sliding seat 35, with high control precision and fast response time, which is beneficial to improving the control precision of the powder spreading device 30, so as to accurately push the translation assembly into the powder pressing groove 21, which is beneficial to improving the processing precision.

[0075] In summary, the present application discloses a powder spreading device 30 of a dry pressing machine for zirconia ceramic blocks for all-ceramic dentures, the dry pressing machine for zirconia ceramic blocks for all-ceramic dentures comprising an extrusion head 10 and an extrusion platform 20 arranged opposite to each other, the extrusion platform 20 being provided with a powder pressing groove 21, the extrusion head 10 being movable toward or away from the powder pressing groove 21 for pressing zirconia ceramic blocks; the powder spreading device 30 comprising a base 31, a lifting slide rail 32, a transverse slide rail 33, a first driving member 34, a sliding seat 35, a second driving member 36 and a flat spreading assembly 37, one side of the base 31 being connected to the extrusion platform 20, the other side extending out of the extrusion platform 20 and being provided with a lifting slide rail 32; the The transverse slide rail 33 is slidably arranged on the lifting slide rail 32; the sliding direction of the transverse slide rail 33 is parallel to the moving direction of the extrusion head 10; the first driving member 34 is arranged on the lifting slide rail 32 and is connected to the transverse slide rail 33; the sliding seat 35 is slidably arranged on the transverse slide rail 33 and can slide toward the top of the powder pressing groove 21; the sliding direction of the sliding seat 35 is perpendicular to the moving direction of the extrusion head 10; the second driving member 36 is arranged on the transverse slide rail 33 and is connected to the sliding seat 35; the paving assembly 37 is arranged on the sliding seat 35 and is used to extend into the powder pressing groove 21 to spread the powder. By setting the powder spreading device 30, the effect of automatically paving the zirconium oxide powder can be achieved by replacing manual labor, thereby improving the production quality of the product.

[0076] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0077] It should be noted that the present invention takes the powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures as an example to introduce the specific structure and working principle of the present invention, but the application of the present invention is not limited to the powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures, and can also be applied to the production and use of other similar workpieces.

[0078] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A powder spreading device for a zirconia ceramic block dry press for all-ceramic dentures, characterized in that: The zirconia ceramic block dry pressing machine for all-ceramic dentures comprises an extrusion head and an extrusion platform which are arranged opposite to each other, a powder pressing groove is arranged on the extrusion platform, and the extrusion head can move toward or away from the powder pressing groove to press the zirconia ceramic block; the powder spreading device comprises: A base, one side of which is connected to the extrusion platform, and the other side of which extends out of the extrusion platform and is provided with a lifting slide rail; A transverse slide rail is slidably disposed on the lifting slide rail; the sliding direction of the transverse slide rail is parallel to the moving direction of the extrusion head; A first driving member is disposed on the lifting slide rail and is transmission-connected to the transverse slide rail; A sliding seat is slidably disposed on the transverse slide rail and can slide toward the upper side of the powder pressing groove; the sliding direction of the sliding seat is perpendicular to the moving direction of the extrusion head; a second driving member, disposed on the transverse sliding rail and drivingly connected to the sliding seat; and The spreading component is arranged on the sliding seat and is used for extending into the powder pressing groove to spread the powder.

2. The powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures according to claim 1 is characterized in that: The top of the extrusion platform is provided with a boss and a supporting step surrounding the boss, and the powder pressing groove is located at the center of the boss; the base comprises: A bottom plate is nested on the supporting step; the bottom plate is provided with an assembly hole, and the assembly hole is adapted to the boss; A fixed plate is connected to the bottom plate; the fixed plate is vertically arranged with the bottom plate; and the lifting rail is arranged to fit the side of the fixed plate.

3. The powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures according to claim 2 is characterized in that: A plurality of connecting holes are provided on the side of the base plate away from the assembly hole; the fixing plate includes a first connecting portion, a supporting portion and a second connecting portion, and the first connecting portion is provided with a plurality of mounting holes; the mounting hole is arranged opposite to the connecting hole, and the connecting hole and the mounting hole are plugged into each other by bolts to fix the first connecting portion; the supporting portion is in the shape of a triangle, and one right-angled side of the supporting portion is connected to the first connecting portion, and the other right-angled side is arranged perpendicular to the base plate and is provided with the second connecting portion; the lifting rail is arranged on the side of the second connecting portion.

4. The powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures according to claim 3 is characterized in that: The base includes a reinforcing plate, which is in a triangular shape. One right-angled side of the reinforcing plate is connected to the first connecting portion, and the other right-angled side is connected to the supporting portion.

5. The powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures according to claim 2, characterized in that: The bottom plate is welded to the supporting step.

6. The powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures according to claim 1 is characterized in that: The depth of the powder pressing groove is less than or equal to the sliding stroke of the transverse sliding rail.

7. The powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures according to claim 1, characterized in that: The tiling component comprises: A driving motor is arranged on the sliding seat; A rotating connecting rod connected to the output shaft of the driving motor; A powder spreading plate connected to the rotating connecting rod; Wherein, the driving motor, the rotating connecting rod and the powder spreading plate are arranged along a first direction, and the first direction is the same as the depth direction of the powder pressing groove.

8. The powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures according to claim 7, characterized in that: The width of the powder spreading plate is equal to the caliber of the powder pressing groove.

9. The powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures according to claim 7, characterized in that: At least two openings arranged in a first direction are arranged on the center line of the powder spreading plate, an assembly step is provided on the end of the rotating connecting rod away from the driving motor, and a fixing groove is provided on the assembly step at a position opposite to the opening; the opening and the fixing groove are connected by pins to fix the powder spreading plate.

10. The powder spreading device of the zirconia ceramic block dry pressing machine for all-ceramic dentures according to claim 1, characterized in that: The first driving member is a stepping motor; and / or the second driving member is a stepping motor.

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