A calcium phosphate material 3D printing device

Abstract

The utility model discloses a kind of calcium phosphate material 3D printing device in bone repair material technical field, including frame, printing assembly, printing platform and the three-way servo device for driving printing assembly and / or printing platform movement, wherein, printing platform is provided with several support mechanisms, it is used to support printing object, including extension arm, extension arm one end is equipped with micropore, the inside of this end is provided with wax and heating sheet, for exuding molten wax to adhere to support printing object, by using molten wax as adhering support structure, by extension arm and resist in the surface of bone material in forming, by heating gauze to appropriate temperature, molten wax exudes micropore, and adhere to form after cooling, to support in this way, with printing process, it can also be heated and dissolved then separate, further move to higher position and adhere, without producing burr, without affecting the surface smoothness degree and shape of bone material.

Description

Technical Field

[0001] This utility model relates to the field of bone repair materials, specifically to a 3D printing device for calcium phosphate materials. Background Technology

[0002] Calcium phosphate is a bone repair material, often used to repair, replace or regenerate bone defects or missing parts caused by trauma, disease, congenital malformation or surgical removal. It is generally made into the shape of bone missing parts through various methods. Due to different preparation methods, its various indicators and application ranges are different.

[0003] For example, photopolymerization technology based on 3D printing uses ultraviolet light to cure a mixture of photosensitive resin and calcium phosphate slurry layer by layer. After molding, it is obtained by debinding and sintering. Its advantages are high precision, easy control of porosity, and smooth surface. Its disadvantages are: due to the irregular shape of the bone material, it generally needs to be supported by a printing scaffold during the printing process. After printing, the scaffold is removed. However, there must be a connection between the scaffold and the bone material. After removing the scaffold, burrs are left, which still require high-precision fine grinding. This not only consumes time, but the grinding can also easily damage the original shape. Utility Model Content

[0004] The purpose of this invention is to provide a 3D printing device for calcium phosphate material, which solves the problem of burrs on the support frame of existing 3D printing devices.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A 3D printing device for calcium phosphate material includes a frame, a printing component, a printing platform, and a three-way servo device for driving the printing component and / or the printing platform to move. The printing platform is provided with a plurality of support mechanisms for supporting the printed object, including an extension arm. One end of the extension arm is provided with a microhole, and wax and a heating mesh are provided inside the end for the molten wax to seep out and adhere to support the printed object.

[0007] As a preferred embodiment of this utility model, the three-axis servo device includes an X-axis servo device, a Y-axis servo device, and a Z-axis servo device. Each servo device includes a track and a servo drive unit. This embodiment is existing technology in 3D printing and will not be described in detail.

[0008] In a preferred embodiment of this utility model, the printing component is mounted on the X-axis servo device, the X-axis servo device is nested on the Z-axis servo device, the printing platform is mounted on the Y-axis servo device, and the X-axis servo device is also equipped with a curing light source.

[0009] As a preferred embodiment of this utility model, the support mechanism further includes a servo slider for driving the extension arm to move horizontally. The surface of the printing platform is provided with a groove, and a slide rail is provided in the groove. The servo slider moves along the slide rail toward the center of the printing platform. This embodiment, by setting a servo slider with a drive, allows the position of the extension arm to be changed so as to move away from / closer to the bone material being molded.

[0010] As a preferred embodiment of this utility model, the servo slider is further provided with a vertically upward cylinder, and the extension arm is arranged horizontally on the output end of the cylinder. This embodiment controls the height of the extension arm through the cylinder so that it can adapt to the support height.

[0011] In a preferred embodiment of this utility model, the wax is slidably disposed at the end of the extension arm, and the extension arm is provided with a push plate and a spring for pushing the wax toward the micropores. The push plate and the spring cause the wax to move toward the micropores so as to contact the heating mesh for melting and adhesion.

[0012] The beneficial effects of this utility model are as follows: by using molten wax as an adhesive support structure, the extension arm abuts against the surface of the bone material being molded, and the heating mesh heats it to a suitable temperature. The molten wax seeps out of the micropores and forms an adhesive after cooling, thus providing support. As the printing process progresses, it can also be heated to melt and then detached, and further moved to a higher position for adhesion. No burrs are generated, and the surface smoothness and shape of the bone material are not affected. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the support mechanism of this utility model;

[0015] Figure 3 For this utility model Figure 2 Enlarged view of the structure of section A in the middle;

[0016] Figure 4 This is a top view of the printing platform of this utility model;

[0017] In the diagram: 1. Frame; 101. Z-axis servo device; 102. Support platform; 103. X-axis servo device; 104. Printing assembly; 105. Curing light source; 106. Printing platform; 107. Y-axis servo device; 2. Support mechanism; 21. Slide groove; 22. Slide rail; 23. Servo slider; 24. Cylinder; 25. Extension arm; 26. Microhole; 27. Wax; 28. Push plate; 29. ​​Spring; 210. Heating mesh. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] Example 1

[0020] like Figure 1-4 As shown, a calcium phosphate material 3D printing device includes a frame 1, a printing component 104, a printing platform 106, and a three-way servo device for driving the printing component 104 and / or the printing platform 106 to move. The printing platform 106 is also provided with a support stage 102 at its center. The printing platform 106 is provided with a plurality of support mechanisms 2 for supporting the printed object, including an extension arm 25. One end of the extension arm 25 is provided with a microhole 26, and wax 27 and a heating mesh 210 are provided inside the end for the molten wax 27 to seep out and adhere to support the printed object.

[0021] This solution uses molten wax 27 as an adhesive support structure. The extension arm 25 presses against the surface of the bone material being molded. The heating mesh 210 heats the wax to a suitable temperature, causing the molten wax 27 to seep out of the micropores 26. After cooling, it forms an adhesive to provide support. As the printing process progresses, the wax can be heated to melt and then detached, moving to a higher position for further adhesion. This process does not produce burrs and does not affect the surface smoothness or shape of the bone material.

[0022] It should be noted that since this bone material is used for bone repair, the composition of wax 27 should be compatible with the human body. In this embodiment, medical bone wax is preferred, which is commonly used in bone repair. Subsequently, the residual wax in the bone material can be removed by existing technical means as needed.

[0023] The three-axis servo device includes an X-axis servo device 103, a Y-axis servo device 107, and a Z-axis servo device 101. Each servo device includes a track and a servo drive unit. The printing component 104 is mounted on the X-axis servo device 103, which is nested on the Z-axis servo device 101. The printing platform 106 is mounted on the Y-axis servo device 107. The X-axis servo device 103 is also equipped with a curing light source 105. This solution is based on existing technology for 3D printing photocurable bone material molding and will not be described in detail.

[0024] The support mechanism 2 also includes a servo slider 23 for driving the extension arm 25 to move horizontally. The surface of the printing platform 106 is provided with a groove 21 and a slide rail 22 is provided in the groove 21. The servo slider 23 moves along the slide rail 22 toward the center of the printing platform 106. This solution uses a servo slider with a drive to change the position of the extension arm so as to move away from / closer to the bone material being molded.

[0025] The servo slider 23 is also equipped with a vertically upward cylinder 24, and the extension arm 25 is set horizontally on the output end of the cylinder 24. In this solution, the height of the extension arm 25 is controlled by the cylinder 24 so that it can adapt to the support height.

[0026] The wax 27 is slidably disposed at the end of the extension arm 25, and the extension arm 25 is provided with a push plate 28 and a spring 29 for pushing the wax 27 toward the micropore 26. The push plate 28 and the spring 29 make the wax 27 move toward the micropore 26 so as to contact the heating mesh 210 for melting and adhesion.

[0027] Detailed implementation: In use, the three-dimensional model of the bone material to be formed is imported into the printing device, and the three-way servo device is started to print. The bone material is formed on the support platform 102. In the early stage of bone material forming, a small part of its surface is stuck to the support platform 102 for fixation. When it reaches a certain height, the servo slider 23 controls the extension arm 25 to gently abut against the surface of the bone material through its three-dimensional model. Then the heating mesh 210 heats until the wax 27 melts. Under the action of the push plate 28, the wax 27 flows out, and the heating mesh 210 stops heating, so that the wax 27 solidifies and forms an adhesion between the extension arm 25 and the bone material for support. At the same height, almost two extension arms 25 are sufficient for adhesion and support. As the bone material forming height increases, the other support mechanisms 2 operate alternately in sequence to gradually increase the support position. The already adhered extension arms 25 can also be removed by restarting the heating mesh 210 to support at a higher position.

[0028] After complete molding, residual wax can be removed using existing technologies, such as steam spraying or solvent washing. Medical-grade bone wax is used, and a small amount of residue in the pores of the bone material will not affect its use.

[0029] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A calcium phosphate material 3D printing device, characterized by, The device includes a frame (1), a printing assembly (104), a printing platform (106), and a three-way servo device for driving the printing assembly (104) and / or the printing platform (106) to move. The printing platform (106) is provided with several support mechanisms (2) for supporting the printed object, including an extension arm (25). One end of the extension arm (25) is provided with a microhole (26), and wax (27) and a heating mesh (210) are provided inside the end for the molten wax (27) to seep out and adhere to the printed object. 2.The calcium phosphate material 3D printing device according to claim 1, wherein, The three-directional servo device includes an X-axis servo device (103), a Y-axis servo device (107), and a Z-axis servo device (101). Each servo device includes a track and a servo drive unit. 3.The calcium phosphate material 3D printing device according to claim 2, wherein, The printing component (104) is mounted on the X-axis servo device (103), which is nested on the Z-axis servo device (101). The printing platform (106) is mounted on the Y-axis servo device (107). The X-axis servo device (103) is also equipped with a curing light source (105). 4.The calcium phosphate material 3D printing device according to claim 1, wherein, The support mechanism (2) also includes a servo slider (23) for driving the extension arm (25) to move horizontally. The surface of the printing platform (106) is provided with a groove (21) and a slide rail (22) is provided in the groove (21). The servo slider (23) moves along the slide rail (22) toward the center of the printing platform (106). 5.The calcium phosphate material 3D printing device according to claim 4, wherein, The servo slider (23) is also provided with a vertically upward cylinder (24), and the extension arm (25) is arranged horizontally on the output end of the cylinder (24). 6.The calcium phosphate material 3D printing device according to claim 1, wherein, The wax (27) is slidably disposed at the end of the extension arm (25), and the extension arm (25) is provided with a push plate (28) and a spring (29) for pushing the wax (27) toward the micropore (26).

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