Zirconium oxide tooth blank powder pressing forming machine

Abstract

The utility model discloses a zirconium oxide tooth blank powder pressing forming machine which is characterized in that the lower surface of a base is fixedly connected with an electric telescopic rod II, the output end of the electric telescopic rod II is fixedly connected with a push rod, the output end of the electric telescopic rod II is fixedly connected with a spring, and one end, far away from the electric telescopic rod II, of the spring is fixedly connected with a fixed block I; the side surface of the first fixing block is fixedly connected with a lower mold, the side surface of the base is fixedly connected with an extension plate, the inner side face of the extension plate is fixedly connected with a filter screen, the side surface of the extension plate is fixedly connected with a motor, the output end of the motor is fixedly connected with a knocking block, and the side surface of the knocking block makes contact with the filter screen in the working process. The lower bottom wall of the extension plate is slidably connected with a storage box, and the storage box is located below the filter screen. By means of the components, the push rod can be recycled during pressing, the influence on tooth blank forming is avoided, the tooth blank is rapidly ejected out to achieve demolding after pressing is completed, powder of the tooth blank can be shaken off through the vibrating filter screen, and the precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder pressing and molding, in particular to a zirconium oxide tooth blank powder pressing and molding machine. Background Art

[0002] Oral health has a huge impact on people's physical health. Teeth are the first prerequisite for people to digest food. The quality of teeth is directly related to the quality of people's primary processing of food, and has a great impact on gastrointestinal digestion and absorption. With the improvement of people's living standards and the advancement of science and technology, people now have higher and higher requirements for tooth restoration, from the past plastic dentures, metal dentures, and ceramic dentures to all-ceramic dentures. All-ceramic dentures are a new type of tooth restoration technology with higher aesthetics and hardness, almost the same as natural teeth. They do not contain metal components, will not affect examinations such as MRI, and have excellent biocompatibility. Therefore, it has become the first choice of modern people. However, the price of existing all-ceramic dentures is relatively high, especially all-ceramic dentures made of zirconia are even more expensive. The reason is the scarcity of zirconia and the difficulty of the preparation method.

[0003] Zirconia, also known as zirconium dioxide, with the chemical formula ZrO2, is a white crystalline zirconium oxide. It typically appears as white, odorless, and tasteless crystals that are insoluble in water, hydrochloric acid, and dilute sulfuric acid. Its chemical inertness and high melting point, high resistivity, high refractive index, and low thermal expansion coefficient make it an important high-temperature resistant material, ceramic insulation material, and ceramic opacifier. It is also the primary raw material for artificial diamonds. Zirconia (IV) is resistant to high temperatures and exhibits excellent thermal stability. In powder form, zirconium (IV) oxide has a fine, smooth texture and is easy to handle. Zirconia (IV) powder possesses many useful properties that make it attractive for a variety of applications. It has a high melting point, low thermal expansion coefficient, and offers chemical and corrosion resistance. These properties make zirconium (IV) oxide an ideal material for dentures. Existing all-ceramic zirconia blanks are typically produced by firing a single piece, followed by meticulous manual polishing. This results in low production efficiency and high costs.

[0004] How to reduce the price of zirconium dioxide all-ceramic teeth is a difficult problem that needs to be solved in the current dental care industry.

[0005] After years of market research and consultation with relevant universities and research institutions, the applicant has developed a new process for mechanically pressing tooth blanks using zirconium dioxide powder. This process improves the production efficiency of zirconium dioxide tooth blanks and significantly reduces the production cost of zirconium dioxide tooth blanks. The key to this process is the equipment used to press all-ceramic tooth blanks using zirconium dioxide powder. Currently, there is no commercially available equipment for this type of pressing, either domestically or internationally.

[0006] Existing powder pressing molding machines can quickly and easily replace the mold and have the function of pressure monitoring and control, but they cannot quickly demold the pressed parts and clean the powder on the surface of the parts during transportation. For example, a powder pressing molding machine disclosed in a Chinese patent, its application number is CN202223076698.4. Although the mold positioning mechanism can make the installation and disassembly of the upper mold more convenient, the upper mold can be positioned by the positioning plate, the device can be controlled by the controller, and the pressing pressure can be monitored by the pressure sensor, the generated parts cannot be quickly and effectively demolded without affecting the pressed parts, and the adsorbed raw material powder on the surface is not cleaned after the parts are formed, which affects the accuracy of the parts after subsequent heating and fixing, and has limitations in use. Utility Model Content

[0007] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a zirconia tooth blank powder pressing and molding machine, so that the upper and lower molds can be quickly replaced for making different types of tooth blanks, and the spring and the push rod can be used to retract the push rod when pressing the tooth blank. After completion, the push rod rises to push the tooth blank out, realizing the function of rapid demolding. At the same time, when the tooth blank is conveyed, the powder adsorbed on the tooth blank is shaken off and recovered through the vibrating filter screen, which not only saves zirconium oxide resources, but also improves the production accuracy of the tooth blank, and avoids the defect of wet method of making the tooth blank that the original accuracy of the tooth blank will be destroyed due to the subsequent pressure fixation and superposition during the firing process.

[0008] The technical solutions provided by this utility model are as follows:

[0009] A zirconia tooth blank powder pressing and molding machine includes a base, a lower surface of which is fixedly connected to a second electric telescopic rod, an output end of which is fixedly connected to a push rod, a spring being fixedly connected to the output end of the second electric telescopic rod, an end of the spring away from the second electric telescopic rod being fixedly connected to a first fixed block, and a side surface of the first fixed block being fixedly connected to a lower mold;

[0010] The upper surface of the base is fixedly connected to a bracket, the upper surface of the bracket is fixedly connected to a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected to a support plate, the lower surface of the support plate is fixedly connected to a second fixing block, the end of the second fixing block away from the support plate is fixedly connected to an upper mold, the upper surface of the base is fixedly connected to a first electric telescopic rod, the output end of the first electric telescopic rod is fixedly connected to a receiving block, and the receiving block is provided with a receiving groove. With the above components, the push rod can be retracted during pressing to avoid affecting the forming of the tooth blank, and the tooth blank can be quickly ejected to achieve demolding after pressing is completed.

[0011] According to the zirconia tooth blank powder compacting machine of the present invention, an extension plate is fixedly connected to the side surface of the base, and a filter is fixedly connected to the inner side of the extension plate. Through these components, the receiving block pushes the tooth blank and raw material powder toward the filter, allowing the powder to fall through the filter for recovery.

[0012] According to the zirconia tooth blank powder compacting machine of the present invention, a motor is fixedly connected to the side surface of the extension plate, and a striking block is fixedly connected to the output end of the motor. The side surface of the striking block contacts the filter screen during operation. With these components, the striking block strikes the filter screen, causing the filter screen to vibrate, shaking off powder on the tooth blank surface and improving the precision of the tooth blank.

[0013] According to the zirconia tooth blank powder compacting machine of the present invention, a storage box is slidably connected to the lower bottom wall of the extension plate, and the storage box is located below the filter. Through this component, the raw material powder falling from the filter can be collected in the storage box for easy recovery.

[0014] According to the zirconia tooth blank powder compacting machine of the present invention, a sleeve is fixedly connected to the upper surface of the base, a slide rod is slidably connected to the inner side wall of the sleeve, and the end of the slide rod, which is away from the sleeve, is fixedly connected to the bracket. Through these components, the slide rod drives the support plate to slide along the sleeve, ensuring stable movement of the support plate.

[0015] According to the zirconia tooth blank powder compacting machine of the present invention, the lower surface of the receiving block is slidably connected to the base, and the side surface of the receiving block is fixedly connected to a claw. Through these components, the receiving block drives the claw to push the generated tooth blank and raw material powder onto the filter screen for filtration.

[0016] In the zirconia tooth blank powder compacting machine of the present invention, a feed port is fixedly connected to the side surface of the receiving block. The feed port, located near the end of the receiving block, extends through the receiving block and into the receiving tank. Through these components, zirconia powder is injected into the receiving tank through the feed port, achieving a filling effect.

[0017] In the zirconia tooth blank powder compacting machine of the present invention, the push rod, at one end away from the second electrically-operated telescopic rod, extends through the lower surface of the first fixed block to the upper surface of the lower mold. The side surface of the lower mold is slidably connected to the base. With these components, the push rod can be used to eject the tooth blank from the lower mold after compaction is completed.

[0018] Beneficial effects: Compared with the existing technology: it can realize the rapid replacement of the upper and lower molds, and is used to make different types of tooth blanks. The spring and the push rod can be used to retract the push rod when pressing the tooth blank. After completion, the push rod rises to push the tooth blank out, realizing the function of rapid demolding. At the same time, when the tooth blank is transported, the powder adsorbed on the tooth blank is shaken off and recovered through the vibrating filter, which not only saves zirconium oxide resources, but also improves the production accuracy of the tooth blank, and avoids the defect of wet blank making that the original accuracy of the tooth blank will be destroyed due to pressure fixation and superposition during the firing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 This is the overall structure diagram of the utility model of the zirconia tooth blank powder pressing molding machine;

[0021] Figure 2 This is a cross-sectional structural diagram of the utility model of a zirconia tooth blank powder pressing and molding machine;

[0022] Figure 3 This is an exploded view of the lower die and electric telescopic rod of the zirconia tooth blank powder pressing and molding machine of the present invention;

[0023] Figure 4 This is a diagram showing the internal structure of the extension plate of the zirconia tooth blank powder pressing and molding machine of the present invention.

[0024] Legend: Base; 2-Lower mold; 3-Bracket; 4-Hydraulic cylinder; 5-Sleeve; 6-Slide rod; 7-Upper mold;

[0025] 8-housing block; 9-electric telescopic rod 1; 10-extension plate; 11-filter; 12-storage box; 13-motor;

[0026] 14-Electric telescopic rod 2; 15-Fixed block 1; 16-Spring; 17-Claw; 18-Accommodating slot; 19-Support plate; 20-Fixed block 2; 21-Push rod; 22-Knocking block; 23-Feeding port. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0028] The utility model embodiment of the zirconia tooth blank powder pressing molding machine, referring to Figure 1-4, including a base 1, an electric telescopic rod 2 14 is fixedly connected to the lower surface of the base 1, which can drive the spring 16 and the push rod 21 to move, and the output end of the electric telescopic rod 2 14 is fixedly connected to the push rod 21, and the end of the push rod 21 away from the electric telescopic rod 2 14 passes through the lower surface of the fixed block 15 and extends to the upper surface of the lower mold 2. Under the drive of the electric telescopic rod 2 14, the formed tooth blank can be ejected from the lower mold 7. The output end of the electric telescopic rod 2 14 is fixedly connected to the spring 16. When the electric telescopic rod 2 14 moves downward, the spring 16 will drive the fixed block 15 and the lower mold 2 to move, and continue to stretch after the lower mold 2 contacts the base 1, and at the same time push The rod 21 will continue to slide downward along the lower mold 2. When the tooth blank is formed, the electric telescopic rod 2 14 moves upward. Under the action of the spring 16, the lower mold 2 is still in contact with the base 1. The push rod 21 will push the tooth blank upward. The end of the spring 16 away from the electric telescopic rod 2 14 is fixedly connected to the fixed block 15. By rotating and snapping into the slot of the lower mold 2, the lower mold 2 is fixed together with the electric telescopic rod 2 14 and the spring 16. The side surface of the fixed block 15 is fixedly connected to the lower mold 2. The side surface of the lower mold 2 is slidably connected to the base 1, and can be pressed out together with the upper mold 7. The tooth blank is fixed to the fixed block 15 through the slot and can be replaced.

[0029] The upper surface of the base 1 is fixedly connected to a bracket 3, which supports the hydraulic cylinder 4. The upper surface of the bracket 3 is fixedly connected to the hydraulic cylinder 4, which pushes the support plate 19 to make the upper mold 7 and the lower mold 2 press the zirconium oxide powder into a tooth blank. The output end of the hydraulic cylinder 4 is fixedly connected to the support plate 19, which drives the upper mold 2 to move. The lower surface of the support plate 19 is fixedly connected to a fixed block 20, which can be rotated to fit into the slot of the upper mold 7 to fix the upper mold 7 and the support plate 19 together. The end of the fixed block 20 away from the support plate 19 is fixedly connected to the upper mold 7. The mold 7, together with the lower mold 2, can press out the tooth blank and is fixed to the fixed block 20 through a slot and can be replaced. The upper surface of the base 1 is fixedly connected to an electric telescopic rod 9, which can push the accommodating block 8 to move on the base 1. The output end of the electric telescopic rod 9 is fixedly connected to the accommodating block 8, which is filled with zirconium oxide powder and can drive the claw 17 to push the tooth blank to the filter 11. The interior of the accommodating block 8 is provided with a accommodating groove 18, which is filled with zirconium oxide powder and can inject the powder into the lower mold 2 after the accommodating block 8 moves.

[0030] The side surface of the base 1 is fixedly connected with an extension plate 10, which fixes the filter screen 11 and allows the powder passing through the filter screen 11 to fall into the extension plate 10. The inner side surface of the extension plate 10 is fixedly connected with the filter screen 11, which can push the powder along with the tooth blank to the extension plate 10 for recovery. The side surface of the extension plate 10 is fixedly connected with a motor 13 to provide power for the rotation of the knocking block 22. The output end of the motor 13 is fixedly connected with the knocking block 22, which knocks the filter screen 11 to vibrate the filter screen 11, thereby accelerating the falling speed of the tooth blank and shaking off the powder on the surface of the tooth blank, thereby improving the accuracy of the tooth blank. The side surface of the knocking block 22 contacts the filter screen 11 during work, and the lower bottom wall of the extension plate 10 is slidably connected with the storage box 12. The zirconium oxide powder falling from the filter 11 is collected, and the storage box 12 is located below the filter 11. The upper surface of the base 1 is fixedly connected to the sleeve 5, which limits the movement of the slide rod 6 and makes the slide rod 6 move stably. The side inner wall of the sleeve 5 is slidably connected to the slide rod 6 to improve the stability of the support plate 19. The end of the slide rod 6 away from the sleeve 5 is fixedly connected to the bracket 3, and the lower surface of the accommodating block 8 is slidably connected to the base 1. The side surface of the accommodating block 8 is fixedly connected with a claw 17 to push the formed tooth blank to the extension plate 10. The side surface of the accommodating block 8 is fixedly connected with a feed port 23 to replenish the zirconium oxide powder into the accommodating groove 18 through the feed port 23. The feed port 23 is close to the end of the accommodating block 8 and passes through the accommodating block 8 to extend to the accommodating groove 18.

[0031] Working principle: Tooth blank cavities are respectively provided on the opposite surfaces of the lower mold 2 and the upper mold 7. The lower mold 2 and the upper mold 7 are respectively fixed on the fixed block 15 and the fixed block 2 20 using the internal card slots. Zirconium oxide powder is injected into the receiving groove 18 through the feed port 23. The electric telescopic rod 1 9 pushes the receiving block 8 to make the powder in the receiving groove 18 fall into the lower mold 2. The electric telescopic rod 2 14 is started to move the electric telescopic rod 2 14 downward. The spring 16 will drive the fixed block 15 and the lower mold 2 to move, and continue to stretch after the lower mold 2 contacts the base 1. At the same time, the push rod 21 will continue to slide downward along the lower mold 2 to the appropriate position, and then the hydraulic cylinder 4 is started to make the support plate 19 drive the upper mold The tool 7 moves downward and together with the lower mold 2 presses the zirconium oxide powder into a tooth blank. At the same time, the slide rod 6 slides along the sleeve 5 to provide stability for the support plate 19. When the tooth blank is formed, the electric telescopic rod 2 14 moves upward. Under the action of the spring 16, the lower mold 2 is still in contact with the base 1. The push rod 21 will push the tooth blank upward. The electric telescopic rod 1 9 is started again, so that the accommodating block 8 drives the claw 17 to push the tooth blank and the unused powder to the extension plate 10. The tooth blank and the powder fall on the filter 11. The motor 13 drives the knocking block 22 to knock on the filter 11 to vibrate the filter 11 and shake off the adsorbed powder on the tooth blank. The fallen powder will fall into the storage box 12 for recycling and wait for next use.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Zirconia tooth blank powder pressing machine, characterized in that, The invention comprises a base (1), a second electric telescopic rod (14) is fixedly connected to the lower surface of the base (1), an output end of the second electric telescopic rod (14) is fixedly connected to a push rod (21), an output end of the second electric telescopic rod (14) is fixedly connected to a spring (16), an end of the spring (16) away from the second electric telescopic rod (14) is fixedly connected to a first fixed block (15), and a side surface of the first fixed block (15) is fixedly connected to a lower mold (2); The upper surface of the base (1) is fixedly connected to a bracket (3), the upper surface of the bracket (3) is fixedly connected to a hydraulic cylinder (4), the output end of the hydraulic cylinder (4) is fixedly connected to a support plate (19), the lower surface of the support plate (19) is fixedly connected to a second fixed block (20), the end of the second fixed block (20) away from the support plate (19) is fixedly connected to an upper mold (7), the upper surface of the base (1) is fixedly connected to an electric telescopic rod (9), the output end of the electric telescopic rod (9) is fixedly connected to a receiving block (8), and a receiving groove (18) is provided inside the receiving block (8).

2. The zirconia tooth blank powder pressing machine according to claim 1, characterized in that: An extension plate (10) is fixedly connected to the side surface of the base (1), and a filter screen (11) is fixedly connected to the inner side surface of the extension plate (10).

3. The zirconia tooth blank powder pressing machine according to claim 2, characterized in that: The side surface of the extension plate (10) is fixedly connected to a motor (13), the output end of the motor (13) is fixedly connected to a knocking block (22), and the side surface of the knocking block (22) contacts the filter screen (11) during operation.

4. The zirconia tooth blank powder compacting machine according to claim 2, characterized in that: The lower bottom wall of the extension plate (10) is slidably connected to a storage box (12), and the storage box (12) is located below the filter screen (11).

5. The zirconia tooth blank powder pressing machine according to claim 1, characterized in that: The upper surface of the base (1) is fixedly connected to a sleeve (5), the inner side wall of the sleeve (5) is slidably connected to a slide rod (6), and the end of the slide rod (6) away from the sleeve (5) is fixedly connected to the bracket (3).

6. The zirconia tooth blank powder compacting machine according to claim 1, characterized in that: The lower surface of the accommodating block (8) is slidably connected to the base (1), and the side surface of the accommodating block (8) is fixedly connected with a claw (17).

7. The zirconia tooth blank powder compacting machine according to claim 1, characterized in that: A feed opening (23) is fixedly connected to the side surface of the accommodating block (8), and an end of the feed opening (23) close to the accommodating block (8) passes through the accommodating block (8) and extends to the accommodating groove (18).

8. The zirconia tooth blank powder compacting machine according to claim 1, characterized in that: One end of the push rod (21) away from the second electric telescopic rod (14) passes through the lower surface of the first fixed block (15) and extends to the upper surface of the lower mold (2). The side surface of the lower mold (2) is slidably connected to the base (1).

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