3D printing device and printing method for orthopedic endoprosthesis

Abstract

The invention relates to the technical field of 3D printing, and discloses an orthopedic endoprosthesis 3D printing device and method, the orthopedic endoprosthesis 3D printing device comprises a bottom plate, and a shoveling mechanism and a printing mechanism are arranged above the bottom plate; the shoveling mechanism comprises a shoveling part and a lifting part; the lifting part is arranged behind the shoveling part; the printing mechanism comprises a control part and a printing part; the printing part is arranged on the inner side of the control part. An electric telescopic rod is started, a connecting plate is pushed, and a scraper knife is driven to shovel up the model along the bottom surface of a lifting plate, so that damage to the model caused by manual picking when the model is adhered can be avoided; a motor is arranged to control a threaded rod to rotate, a threaded sleeve is pushed to ascend and descend on the surface of the threaded rod, a sliding sleeve slides on the surface of a third sliding rod, a linear lead screw motor is started, a fourth sliding rod and a third threaded rod are driven to move front and back, a third motor is controlled to enable the third threaded rod to rotate, and a moving block drives a printing head to move left and right; through the arrangement, the flexibility of blank printing can be improved, and the blank can be printed.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a 3D printing device and a printing method for an orthopedic internal prosthesis. Background Art

[0002] The birth of 3D printers has important significance for many fields of human beings. 3D printing is usually achieved by using digital technology material printers. It is often used to make models in the fields of mold manufacturing, industrial design, etc., and then gradually used for the direct manufacturing of some products. There are already parts printed using this technology. This technology is used in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automobiles, aerospace, dental and medical industries, education, geographic information systems, civil engineering, guns and other fields.

[0003] The Chinese patent provides a 3D printing device and method for orthopedic internal prosthesis, with the publication number CN114052993A, comprising a printing base and a printing head, wherein the printing base is arranged in a sealed cavity, the sealed cavity is provided with a hydraulic oil inlet and outlet, and the hydraulic oil inlet and outlet are connected to the hydraulic oil system; an annular diaphragm is arranged at the bottom of the sealed cavity along the outer periphery of the printing base; the printing head is arranged on the upper frame plate, the bottom of the annular diaphragm is connected to the bottom of the sealed cavity, the top of the annular diaphragm is connected to the upper frame plate, and the printing head is located in the annular diaphragm; the printing head is provided with a mud material nozzle and a molten salt nozzle, the mud material nozzle is connected to the mud material bin, and the molten salt nozzle is connected to the molten salt bin; the sealed cavity or the hydraulic oil system is provided with a cooling mechanism. The present invention improves the existing extrusion type ceramic 3D printing device, uses hydraulic oil to apply a certain extrusion force to the blank during the molding process, improves the density of the blank, has small mass loss and deformation during firing, and can significantly improve the strength of the product.

[0004] However, when the device is reprinted, the reprinted embryo will be bonded to the surface of the base, and manual removal may have a certain impact on the embryo. Therefore, it is necessary to provide a 3D printing device and printing method for orthopedic internal prosthesis. Summary of the invention

[0005] The object of the present invention is to provide a 3D printing device and a printing method for an orthopedic internal prosthesis to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a 3D printing device and printing method for orthopedic internal prosthesis, comprising a base plate, above which a shoveling mechanism and a printing mechanism are arranged; the shoveling mechanism comprises a shoveling part and a lifting part; the lifting part is arranged behind the shoveling part; the printing mechanism comprises a control part and a printing part; the printing part is arranged on the inner side of the control part.

[0007] Preferably, the scraping part includes a support plate, a slider is provided on the top surface of the support plate, the bottom surface of the slider is fixedly connected to the top surface of the support plate, a scraper is provided on the inner wall of the slider, the bottom surface of the scraper is in contact with the inner wall of the slider, the front end of the scraper is narrow and the rear end is wide, and the surface of the scraper is treated with anti-adhesion.

[0008] Preferably, an extension rod is provided on the front side of the blade, and the back side of the extension rod is fixedly connected to the front side of the blade. A connecting plate is provided on the front side of the blade, and the back side of the connecting plate is fixedly connected to the front side of the extension rod. An electric telescopic rod is provided on the back side of the connecting plate, and the front side of the electric telescopic rod is fixedly connected to the back side of the connecting plate. The top surface of the electric telescopic rod is fixedly connected to the bottom surface of the slider, and the model of the electric telescopic rod is XTL100.

[0009] Preferably, the lifting part includes a motor, a threaded rod is provided on the bottom surface of the motor output rod, the top surface of the threaded rod is fixedly connected to the bottom surface of the motor output rod, a limit block is provided on the top surface of the threaded rod, the bottom surface of the limit block is fixedly connected to the top surface of the threaded rod, the model of the motor is YE3, and the setting of the motor can make the threaded rod rotate, so that the lifting part can be lifted and lowered.

[0010] Preferably, a lifting plate is provided on the surface of the threaded rod, the surface of the threaded rod is threadedly connected to the inner wall of the lifting plate, the inner wall of the lifting plate is slidably connected with a sliding rod, the surface of the lifting plate contacts a fixed plate, a support rod is fixedly provided on the bottom surface of the fixed plate, a device housing is fixedly provided on the top surface of the fixed plate, and the device housing is hinged with an opening and closing plate through a hinge. The setting of the opening and closing plate can prevent external factors from affecting the structure inside the device during operation.

[0011] Preferably, the control part includes a fixing plate, the bottom surface of the fixing plate is fixedly connected to the top surface of the device housing, a second motor is arranged on the inner wall of the fixing plate, the surface of the second motor is fixedly connected to the inner wall of the fixing plate, a second threaded rod is fixedly arranged on the bottom surface of the output rod of the second motor, a second bearing seat is rotatably connected to the bottom surface of the second threaded rod, and a threaded sleeve is threadedly connected to the surface of the second threaded rod.

[0012] Preferably, a second sliding rod is provided on the back of the threaded sleeve, the front of the second sliding rod is fixedly connected to the back of the threaded rod, a sliding sleeve is provided on the back of the second sliding rod, the front of the sliding sleeve is fixedly connected to the back of the second sliding rod, a third sliding rod is slidably connected to the inner wall of the sliding sleeve, and the third sliding sleeve is slidably connected to the surface of the second sliding rod.

[0013] Preferably, a third bearing seat is fixedly provided on the inner side surface of the left sleeve, and a linear screw motor is rotatably connected to the inner wall of the third bearing seat, and the model of the linear screw motor is 86A4N.

[0014] Preferably, the printing part includes a support block, the bottom surface of the support block is fixedly connected to the third sliding sleeve and the top surface of the linear screw motor, the right side of the support block is provided with a third motor, the left side of the third motor is fixedly connected to the right side of the support block, the left side of the third motor output rod passes through the right side of the support block and extends to the inner side of the support block, and the left side of the third motor output rod is fixedly provided with a third threaded rod.

[0015] Preferably, a fourth bearing seat is arranged on the left side of the third threaded rod, the inner wall of the fourth bearing seat is rotatably connected to the left side of the third threaded rod, and the right side of the fourth bearing seat is fixedly connected to the inner side of the support block.

[0016] Preferably, the printing part includes a moving block, the inner wall of the moving block is threadedly connected to the surface of the third threaded rod, the inner wall of the moving block is provided with a fourth slide rod, the left side of the fourth slide rod is fixedly connected to the right side of the linear screw motor, the right side of the fourth slide rod is fixedly connected to the left side of the third sleeve, the bottom surface of the moving block is provided with a print head, and the top surface of the print head is fixedly connected to the bottom surface of the moving block.

[0017] A scanning method for a 3D printed orthopedic limb scanning sampling device, comprising the following steps: S1. Scan and make the prosthesis model required; S2, preparing printing materials, and loading the printing materials into the print head; S3, starting the printing mechanism according to the model, and controlling the second motor and the third motor to make the print head move and print under the linkage of the threaded rod and the surface of the sliding rod; S4. After printing is completed, the motor is turned on to control the lifting plate to slide down on the surface of the slide rod. When it slides to a suitable position, the electric telescopic rod is turned on, and the connecting plate is pulled to push the scraper to scoop up the printed model on the top surface of the lifting plate. S5. When the model is initially cooled, take out the model for subsequent operations.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the 3D printing device and printing method of the orthopedic internal prosthesis, when printing is completed, the device turns on the electric telescopic rod, pushes the connecting plate, and drives the scraper to scoop up the printed model along the bottom surface of the lifting plate. This arrangement can avoid damage to the model caused by manual removal when the model is adhered; by setting a limit block, the lifting plate can be prevented from being separated from the range of the threaded rod when lifting; by setting a motor to control the rotation of the threaded rod, the threaded sleeve is pushed to lift and lower the surface of the threaded rod, the sliding sleeve slides on the surface of the third sliding rod, the linear screw motor is turned on, the fourth sliding rod and the third threaded rod are driven to move forward and backward, the third motor is controlled to rotate the third threaded rod, and the moving block drives the print head to move left and right. This arrangement can improve the flexibility of embryo printing and can perform all-round printing on the embryo; the setting of the scraper with a narrow front and a wide back can quickly scoop up the embryo. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a bottom view of the overall three-dimensional structure of the present invention; Figure 3 The structure of the present invention Figure 2 A magnified image of area A; Figure 4 The structure of the present invention Figure 2 A magnified view of area B; Figure 5 It is a rear view of the overall three-dimensional structure of the present invention; Figure 6 It is a schematic diagram of a partial printing mechanism of the present invention; Figure 7 It is a schematic diagram of the local shoveling mechanism of the present invention.

[0020] In the figure: base plate 1, shovel mechanism 2, printing mechanism 3, support plate 201, slider 202, scraper 203, extension rod 204, connecting plate 205, electric telescopic rod 206, motor 207, threaded rod 208, limit block 209, lifting plate 210, slide bar 211, support rod 212, fixed plate 213, device housing 214, hinge 215, opening and closing plate 216, fixed plate 301, second motor 302, second threaded rod 303, second bearing seat 304, threaded sleeve 305, sleeve 318, second slide bar 306, third sleeve 307, third slide bar 308, linear screw motor 309, third bearing seat 310, support block 311, third motor 312, third threaded rod 313, fourth bearing seat 314, moving block 315, fourth slide bar 316, print head 317. Implementation

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0022] Combination Figure 1-Figure 7 A 3D printing device and printing method for an orthopedic internal prosthesis, comprising a base plate 1, a shoveling mechanism 2 and a printing mechanism 3 are arranged above the base plate 1; The shoveling mechanism 2 includes a shoveling part and a lifting part; The lifting part is arranged behind the shoveling part; The printing mechanism 3 includes a control unit and a printing unit; The printing section is arranged inside the control section.

[0023] The scraping part includes a support plate 201 , a slider 202 is arranged on the top surface of the support plate 201 , the bottom surface of the slider 202 is fixedly connected to the top surface of the support plate 201 , a scraper 203 is arranged on the inner wall of the slider 202 , and the bottom surface of the scraper 203 contacts the inner wall of the slider 202 .

[0024] An extension rod 204 is provided on the front side of the blade 203, and the back side of the extension rod 204 is fixedly connected to the front side of the blade 203. A connecting plate 205 is provided on the front side of the blade 203, and the back side of the connecting plate 205 is fixedly connected to the front side of the extension rod 204. An electric telescopic rod 206 is provided on the back side of the connecting plate 205, and the front side of the electric telescopic rod 206 is fixedly connected to the back side of the connecting plate 205. The top surface of the electric telescopic rod 206 is fixedly connected to the bottom surface of the slider 202.

[0025] The lifting part includes a motor 207, a threaded rod 208 is arranged on the bottom surface of the output rod of the motor 207, the top surface of the threaded rod 208 is fixedly connected to the bottom surface of the output rod of the motor 207, a limit block 209 is arranged on the top surface of the threaded rod 208, and the bottom surface of the limit block 209 is fixedly connected to the top surface of the threaded rod 208.

[0026] A lifting plate 210 is arranged on the surface of the threaded rod 208, and the surface of the threaded rod 208 is threadedly connected to the inner wall of the lifting plate 210, and a sliding rod 211 is slidably connected to the inner wall of the lifting plate 210. The surface of the lifting plate 210 contacts a fixed plate 213, and a support rod 212 is fixedly arranged on the bottom surface of the fixed plate 213, and a device housing 214 is fixedly arranged on the top surface of the fixed plate 213, and the device housing 214 is hinged with an opening and closing plate 216 through a hinge 215.

[0027] Further: when the printing is completed, the device turns on the electric telescopic rod 206, pushes the connecting plate 205, and drives the scraper 203 to scoop up the printed model along the bottom surface of the lifting plate 210. This arrangement can avoid damage to the model caused by manual removal when the model is stuck; by setting the limit block 209, the lifting plate 210 can be prevented from being out of the range of the threaded rod 208 when it is lifted; Example

[0028] On the basis of Example 1, it is further obtained that the control part includes a fixing plate 301, the bottom surface of the fixing plate 301 is fixedly connected to the top surface of the device housing 214, the inner wall of the fixing plate 301 is provided with a second motor 302, the surface of the second motor 302 is fixedly connected to the inner wall of the fixing plate 301, a second threaded rod 303 is fixedly provided on the bottom surface of the output rod of the second motor 302, the bottom surface of the second threaded rod 303 is rotatably connected to a second bearing seat 304, and the surface of the second threaded rod 303 is threadedly connected to a threaded sleeve 305.

[0029] A second slide rod 306 is arranged on the back of the threaded sleeve 305, and the front of the second slide rod 306 is fixedly connected to the back of the threaded rod 305. A sliding sleeve 318 is arranged on the back of the second slide rod 306, and the front of the sliding sleeve 318 is fixedly connected to the back of the second slide rod 306. The inner wall of the sliding sleeve 318 is slidably connected to the third slide rod 308, and the surface of the second slide rod 306 is slidably connected to the third sliding sleeve 307.

[0030] A third bearing seat 310 is fixedly disposed on the inner side surface of the left sliding sleeve 318 , and a linear screw motor 309 is rotatably connected to the inner wall of the third bearing seat 310 .

[0031] The printing part includes a support block 311, the bottom surface of the support block 311 is fixedly connected to the third sliding sleeve 307 and the top surface of the linear screw motor 309, the right side of the support block 311 is provided with a third motor 312, the left side of the third motor 312 is fixedly connected to the right side of the support block 311, the left side of the output rod of the third motor 312 passes through the right side of the support block 311 and extends to the inner side of the support block 311, and the left side of the output rod of the third motor 312 is fixedly provided with a third threaded rod 313.

[0032] A fourth bearing seat 314 is disposed on the left side of the third threaded rod 313 . The inner wall of the fourth bearing seat 314 is rotatably connected to the left side of the third threaded rod 313 , and the right side of the fourth bearing seat 314 is fixedly connected to the inner side of the support block 311 .

[0033] The printing part includes a moving block 315, the inner wall of the moving block 315 is threadedly connected to the surface of the third threaded rod 313, the inner wall of the moving block 315 is provided with a fourth slide bar 316, the left side of the fourth slide bar 316 is fixedly connected to the right side of the linear screw motor 309, the right side of the fourth slide bar 316 is fixedly connected to the left side of the third sliding sleeve 307, the bottom surface of the moving block 315 is provided with a print head 317, and the top surface of the print head 317 is fixedly connected to the bottom surface of the moving block 315 A scanning method for a 3D printed orthopedic limb scanning sampling device, comprising the following steps: S1. Scan and make the prosthesis model required; S2, preparing printing materials, and loading the printing materials into the print head; S3, start the printing mechanism 3 according to the model, and control the second motor 302 and the third motor 312 to make the print head 317 move and print under the linkage of the threaded rod and the surface of the slide rod; S4, after printing is completed, the motor 207 is turned on to control the lifting plate 210 to slide downward on the surface of the slide bar 211, slide to a suitable position, turn on the electric telescopic rod 203, pull the connecting plate 205 to push the scraper 203 to scoop up the printed model on the top surface of the lifting plate 210; S5. When the model is initially cooled, take out the model for subsequent operations.

[0034] Further: by setting the motor 302 to control the rotation of the threaded rod 303, the threaded sleeve 305 is pushed up and down on the surface of the threaded rod 303, the sliding sleeve 318 slides on the surface of the third sliding rod 308, the linear screw motor 309 is turned on, and the fourth sliding rod 316 and the third threaded rod 313 are driven to move forward and backward, and the third motor 312 is controlled to rotate the third threaded rod 313, so that the moving block 315 drives the print head 317 to move left and right. This setting can improve the flexibility of embryo printing and can perform all-round printing on the embryo; the setting of the scraper 203 with a narrow front and a wide back can quickly scoop up the embryo.

[0035] In actual operation, the motor 302 is turned on to control the rotation of the threaded rod 303, the threaded sleeve 305 is pushed up and down on the surface of the threaded rod 303, the sliding sleeve 318 slides on the surface of the third sliding rod 308, the linear screw motor 309 is turned on to drive the fourth sliding rod 316 and the third threaded rod 313 to move forward and backward, the third motor 312 is controlled to rotate the third threaded rod 313, and the moving block 315 drives the print head 317 to move left and right to perform omnidirectional printing; After printing is completed, the motor 207 is turned on to push the threaded rod 208 to rotate, so that the lifting plate 210 slides on the surface of the slide rod 211, the lifting plate 210 descends, the electric telescopic rod 206 is turned on, and the scraper 203 is pushed to scoop up the model on the surface of the lifting plate 210.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A 3D printing device and a printing method for an orthopedic internal prosthesis, comprising a base plate (1), characterized in that: A shoveling mechanism (2) and a printing mechanism (3) are arranged above the bottom plate (1); The shoveling mechanism (2) comprises a shoveling part and a lifting part; The lifting part is arranged behind the shoveling part; The printing mechanism (3) comprises a control unit and a printing unit; The printing part is arranged inside the control part.

2. A 3D printing device and printing method for orthopedic internal prosthesis according to claim 1, characterized in that: The material scraping portion comprises a support plate (201), a slider (202) is arranged on the top surface of the support plate (201), the bottom surface of the slider (202) is fixedly connected to the top surface of the support plate (201), a scraper (203) is arranged on the inner wall of the slider (202), and the bottom surface of the scraper (203) is in contact with the inner wall of the slider (202).

3. A 3D printing device and printing method for an orthopedic internal prosthesis according to claim 2, characterized in that: The front of the scraper (203) is provided with an extension rod (204), the back of the extension rod (204) is fixedly connected to the front of the scraper (203), the front of the scraper (203) is provided with a connecting plate (205), the back of the connecting plate (205) is fixedly connected to the front of the extension rod (204), the back of the connecting plate (205) is provided with an electric telescopic rod (206), the front of the electric telescopic rod (206) is fixedly connected to the back of the connecting plate (205), and the top surface of the electric telescopic rod (206) is fixedly connected to the bottom surface of the slider (202).

4. A 3D printing device and printing method for orthopedic internal prosthesis according to claim 1, characterized in that: The lifting part comprises a motor (207), a threaded rod (208) is arranged on the bottom surface of an output rod of the motor (207), a top surface of the threaded rod (208) is fixedly connected to the bottom surface of the output rod of the motor (207), a limiting block (209) is arranged on the top surface of the threaded rod (208), and a bottom surface of the limiting block (209) is fixedly connected to the top surface of the threaded rod (208).

5. A 3D printing device and printing method for orthopedic internal prosthesis according to claim 4, characterized in that: A lifting plate (210) is arranged on the surface of the threaded rod (208), the surface of the threaded rod (208) is threadedly connected to the inner wall of the lifting plate (210), the inner wall of the lifting plate (210) is slidably connected to a sliding rod (211), the surface of the lifting plate (210) contacts a fixing plate (213), a supporting rod (212) is fixedly arranged on the bottom surface of the fixing plate (213), a device housing (214) is fixedly arranged on the top surface of the fixing plate (213), and the device housing (214) is hingedly connected to an opening and closing plate (216) via a hinge (215).

6. A 3D printing device and printing method for orthopedic internal prosthesis according to claim 1, characterized in that: The control unit comprises a fixing plate (301), the bottom surface of the fixing plate (301) being fixedly connected to the top surface of the device housing (214), a second motor (302) being arranged on the inner wall of the fixing plate (301), the surface of the second motor (302) being fixedly connected to the inner wall of the fixing plate (301), a second threaded rod (303) being fixedly arranged on the bottom surface of an output rod of the second motor (302), a second bearing seat (304) being rotatably connected to the bottom surface of the second threaded rod (303), and a threaded sleeve (305) being threadedly connected to the surface of the second threaded rod (303).

7. A 3D printing device and printing method for orthopedic internal prosthesis according to claim 6, characterized in that: A second slide bar (306) is arranged on the back of the threaded sleeve (305), the front of the second slide bar (306) is fixedly connected to the back of the threaded rod (305), a sliding sleeve (318) is arranged on the back of the second slide bar (306), the front of the sliding sleeve (318) is fixedly connected to the back of the second slide bar (306), the inner wall of the sliding sleeve (318) is slidably connected to the third slide bar (308), and the surface of the second slide bar (306) is slidably connected to the third slide sleeve (307).

8. A 3D printing device and printing method for orthopedic internal prosthesis according to claim 7, characterized in that: A third bearing seat (310) is fixedly disposed on the inner side surface of the left sliding sleeve (318), and a linear screw motor (309) is rotatably connected to the inner wall of the third bearing seat (310).

9. A 3D printing device and printing method for orthopedic internal prosthesis according to claim 1, characterized in that: The printing section comprises a support block (311), the bottom surface of the support block (311) being fixedly connected to the third sliding sleeve (307) and the top surface of the linear screw motor (309), the right side surface of the support block (311) being provided with a third motor (312), the left side surface of the third motor (312) being fixedly connected to the right side surface of the support block (311), the left side surface of an output rod of the third motor (312) penetrating the right side surface of the support block (311) and extending to the inner side of the support block (311), and the left side surface of the output rod of the third motor (312) being fixedly provided with a third threaded rod (313).

10. A 3D printing device and printing method for orthopedic internal prosthesis according to claim 9, characterized in that: A fourth bearing seat (314) is provided on the left side of the third threaded rod (313); the inner wall of the fourth bearing seat (314) is rotatably connected to the left side of the third threaded rod (313); and the right side of the fourth bearing seat (314) is fixedly connected to the inner side of the support block (311).

11. A 3D printing device and printing method for orthopedic internal prosthesis according to claim 1, characterized in that: The printing section comprises a moving block (315), the inner wall of the moving block (315) being threadedly connected to the surface of the third threaded rod (313), the inner wall of the moving block (315) being provided with a fourth sliding rod (316), the left side surface of the fourth sliding rod (316) being fixedly connected to the right side surface of the linear screw motor (309), the right side surface of the fourth sliding rod (316) being fixedly connected to the left side surface of the third sliding sleeve (307), the bottom surface of the moving block (315) being provided with a printing head (317), the top surface of the printing head (317) being fixedly connected to the bottom surface of the moving block (315).

12. A scanning method according to any one of claims 1 to 12, characterized in that: The following steps are involved: S1. Scan and make the prosthesis model required; S2, preparing printing materials, and loading the printing materials into the print head; S3, starting the printing mechanism (3) according to the model, and controlling the second motor (302) and the third motor (312) so that the printing head (317) moves and prints under the linkage of the threaded rod and the surface of the sliding rod; S4, after printing is completed, the motor (207) is turned on to control the lifting plate (210) to slide downward on the surface of the slide rod (211), slide to a suitable position, turn on the electric telescopic rod (203), pull the connecting plate (205) to push the scraper (203) to scoop up the printed model on the top surface of the lifting plate (210); S5. When the model is initially cooled, take out the model for subsequent operations.

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