CN114932681A

CN114932681A - Molding device for 3D printing of artificial bone by high polymer material

Info

Publication number: CN114932681A
Application number: CN202210855961.5A
Authority: CN
Inventors: 汪焰恩; 李欣培; 张驰; 毛海龙; 刘喆维
Original assignee: Xi'an Bone Biological Technology Co ltd
Current assignee: Xi'an Bone Biological Technology Co ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-08-23

Abstract

The invention relates to a forming device for a high polymer material 3D printing artificial bone. The device comprises a machine body, a plane moving mechanism horizontally arranged at the top of the machine body, a first linear driving mechanism and a plurality of auxiliary guide rods which are vertically arranged in the machine body, an extrusion head connected to a moving terminal of the plane moving mechanism, a printing platform in threaded connection with the first linear driving mechanism, and a surface processing mechanism arranged in the machine body; the device has add surface treatment mechanism, can carry out spacing fixed with fashioned artifical bone through stop gear after artifical bone shaping on print platform, then control finish machining mechanism and remove the position that needs to handle to artifical bone surface, and adjust the finish machining and apply in the processing pressure on artifical bone surface, also can cooperate the position that the fine machining mechanism of surrounding type actuating mechanism control processed artifical bone simultaneously, make the fine machining process in artifical bone surface more accurate, stable, and be applicable to different specifications, the artifical bone of material.

Description

Molding device for 3D printing of artificial bone by high polymer material

Technical Field

The invention belongs to the technical field of 3D printing and forming of artificial bones, and particularly relates to a forming device for 3D printing of artificial bones by high polymer materials.

Background

3D printing (3 DP), a technique for constructing objects by layer-by-layer printing using bondable materials such as powdered metals or plastics based on digital model files, is one of the rapid prototyping techniques, also known as additive manufacturing.

3D printing is typically implemented using digital technology material printers. The method is often used for manufacturing models in the fields of mold manufacturing, industrial design and the like, and is gradually used for directly manufacturing some products, and parts printed by the technology are already available. The technology has applications in jewelry, footwear, industrial design, construction, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, and other fields.

The artificial bone refers to an artificial biomaterial which can replace human bones or repair defects of bone tissues. When it is necessary to replace a joint or treat a bone fracture, the most desirable way is to achieve self-repair of the bone through a tissue regeneration function. However, in many cases, the human bone cannot repair itself, such as necrosis of bone tissue and trauma of bone joint, and the help of artificial bone is needed, and the development of ideal artificial bone material is an important subject in the fields of medicine and biomaterial science.

And because the shape of the bone of each patient is different and the structure of the artificial bone is irregular, therefore, the 3D printing technology is mostly adopted for production when the artificial bone is manufactured according to the actual condition of a patient, however, most of the existing common 3D printers are modeled by computer modeling software, and then the built three-dimensional model is partitioned into sections layer by layer, i.e., slicing, to guide the printer to print layer by layer and finally form the artificial bone with a specific shape, but such 3D printers do not have a function of finishing the artificial bone, because the artificial bone is manufactured in a layer-by-layer stacking manner, so that the surface of the molded product has obvious stacked gaps, which not only affects the appearance, but also affects the surface smoothness, therefore, it is required to be placed in other equipment for finishing, such as grinding and polishing, but this also results in a long processing time and a high processing cost of the artificial bone.

Disclosure of Invention

The invention aims to solve the problems and provide a molding device for 3D printing of artificial bones by high polymer materials, which is simple in structure and reasonable in design.

The invention realizes the purpose through the following technical scheme:

a forming device for 3D printing of artificial bones by high polymer materials comprises a machine body, a plane moving mechanism horizontally arranged at the top of the machine body, a first linear driving mechanism and a plurality of auxiliary guide rods which are vertically arranged in the machine body, an extrusion head connected to a moving terminal of the plane moving mechanism, a printing platform in threaded connection with the first linear driving mechanism, and a surface treatment mechanism arranged in the machine body, wherein the surface treatment mechanism is used for finish machining of the surface of the printed artificial bones;

the surface treatment mechanism comprises second linear driving mechanisms symmetrically arranged in the machine body, a ring frame in threaded connection with the second linear driving mechanisms, an annular chamber arranged in the ring frame, a surrounding type driving mechanism arranged in the annular chamber, a pressure adjusting mechanism connected to the surrounding type driving mechanism, a plurality of limiting mechanisms and displacement adjusting mechanisms connected to the inner circular surface of the ring frame, and a finish machining mechanism arranged at one end of the displacement adjusting mechanism, wherein the displacement adjusting mechanism is movably connected with the ring frame and is connected with the pressure adjusting mechanism, and the ring frame is positioned above the printing platform;

the surrounding type driving mechanism is used for driving the pressure adjusting mechanism, the displacement adjusting mechanism and the finishing mechanism to rotate around the central axis of the surrounding frame;

the pressure adjusting mechanism is used for adjusting the elongation of the displacement adjusting mechanism and the pressure applied to the printing artificial bone by the finish machining mechanism.

As a further optimization scheme of the invention, the first linear driving mechanism and the second linear driving mechanism respectively comprise a driving motor arranged at the bottom of the machine body and a screw rod connected to the output shaft end of the driving motor, the outer wall of the ring frame is connected with a plurality of supporting rods, and one end of each supporting rod is connected with a sliding block in threaded connection with the screw rod.

As a further optimization scheme of the invention, the limiting mechanism comprises a first corrugated pipe connected to the inner circular surface of the ring frame, a first limiting sleeve rod connected to one end of the first corrugated pipe, a first motor connected to the inner wall of the annular chamber, a coupler connected to the output shaft end of the first motor and a first lead screw connected to one end of the coupler, and the first lead screw is in threaded connection with the first limiting sleeve rod.

As a further optimized scheme of the present invention, the surrounding type driving mechanism includes an inner ring body disposed in the annular chamber, a ring gear connected to the inner ring body, a second motor connected to an inner wall of the annular chamber, a first conductive member and a second conductive member, a transmission gear connected to an output shaft end of the second motor and engaged with the ring gear, and a first conductive ring and a second conductive ring disposed on the inner ring body in a penetrating manner, wherein the first conductive member and the second conductive member are respectively in contact with the first conductive ring and the second conductive ring, and the first conductive member and the second conductive member are both connected with an external power line.

As a further optimization scheme of the invention, the pressure adjusting mechanism comprises a third motor and an electric push rod which are connected to an inner ring body, a pressure applying ring, a driving ring and a fixing ring which are sequentially sleeved on an output shaft of the third motor, a limiting ring movably connected to the outer wall of the pressure applying ring, a connecting rod connected to the outer wall of the limiting ring, a first damping layer connected to one end of the fixing ring, a second damping layer and a plurality of arc limiting blocks which are respectively connected to two ends of the driving ring, springs connected between the arc limiting blocks and the pressure applying ring, an inserting block connected to the output shaft of the third motor and a connecting cylinder cover connected to the outer circular surface of the fixing ring, wherein the connecting cylinder cover is connected with the displacement adjusting mechanism, the connecting rod is connected with the output end of the electric push rod, and the first damping layer is in contact with the second damping layer.

As a further optimization scheme of the invention, the displacement adjusting mechanism comprises a driven ring body movably connected to the inner circular surface of the ring frame, a second lead screw penetrating through the driven ring body, a second corrugated pipe connected to the driven ring body and a second limiting sleeve rod connected to one end of the second corrugated pipe, one end of the second lead screw extends into the annular chamber and is fixedly connected with the connecting cylinder cover, and the second lead screw is in threaded connection with the second limiting sleeve rod.

As a further optimized scheme of the present invention, the finishing mechanism includes a fourth motor disposed at one end of the second stop collar rod far from the second corrugated pipe, and a detachable workpiece connected to an output shaft end of the fourth motor, and an output shaft of the fourth motor penetrates through the second stop collar rod and extends to the outside of the second stop collar rod.

As a further optimization scheme of the present invention, wiring holes are formed in both the wall of the second limiting sleeve rod and the wall of the driven ring body, two ends of the wiring hole formed in the second limiting sleeve rod are respectively communicated with the inner space of the second bellows and the inner space of the second limiting sleeve rod, two ends of the wiring hole formed in the driven ring body are respectively communicated with the inner space of the second bellows and the inner space of the annular chamber, a telescopic wire is arranged in the second bellows, one end of the telescopic wire penetrates through the correspondingly formed wiring hole to be electrically connected to the fourth motor, and the other end penetrates through the correspondingly formed wiring hole to be electrically connected to the first conductive ring and the second conductive ring.

The invention has the beneficial effects that: the surface processing mechanism is additionally arranged, after the artificial bone is formed on the printing platform, the limiting mechanism can be controlled to limit and fix the formed artificial bone, the displacement adjusting mechanism is controlled by the pressure adjusting mechanism to move the finish machining mechanism to the position to be processed on the surface of the artificial bone, and then the pressure adjusting mechanism is used for adjusting the machining pressure applied to the surface of the artificial bone in finish machining so as to be adapted to the artificial bones of different materials, so that the machining precision is greatly improved, meanwhile, the position of the finish machining mechanism for machining the artificial bone can be controlled by matching with the surrounding type driving mechanism, so that the process of finish machining the surface of the artificial bone is more accurate and stable, and the surface processing mechanism is suitable for the artificial bones of different specifications and materials.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a side view of FIG. 1 of the present invention;

FIG. 3 is a partial schematic view of the surface treating mechanism of the present invention;

FIG. 4 is an enlarged view taken at A of FIG. 3 in accordance with the present invention;

FIG. 5 is a schematic structural view of the pressure adjustment mechanism of the present invention;

FIG. 6 is an enlarged view of the invention at B in FIG. 3;

FIG. 7 is an enlarged view of the invention at C of FIG. 3;

FIG. 8 is a perspective view of the overall structure of the present invention;

FIG. 9 is a perspective view of the surface treating mechanism of the present invention.

In the figure: 1. a body; 2. a plane moving mechanism; 3. an extrusion head; 4. a first linear drive mechanism; 5. an auxiliary guide bar; 6. a printing platform; 7. a surface treatment mechanism; 71. a second linear drive mechanism; 72. a ring frame; 7201. a support bar; 7202. a slider; 7203. an annular chamber; 73. a limiting mechanism; 7301. a first motor; 7302. a coupling; 7303. a first bellows; 7304. a first lead screw; 7305. a first limit loop bar; 74. a wrap-around drive mechanism; 7401. an inner ring body; 7402. a second motor; 7403. a transmission gear; 7404. a ring gear; 7405. a first conductive member; 7406. a second conductive member; 7407. a first conductive ring; 7408. a second conductive ring; 7409. the power line is externally connected; 75. a pressure adjusting mechanism; 7501. a third motor; 7502. an electric push rod; 7503. a connecting cylinder cover; 7504. a fixing ring; 7505. a first damping layer; 7506. a second damping layer; 7507. a drive ring; 7508. an arc-shaped limiting block; 7509. a spring; 7510. a limiting ring; 7511. applying a pressure ring; 7512. a connecting rod; 7513. inserting a block; 76. a displacement adjustment mechanism; 7601. a driven ring body; 7602. a second bellows; 7603. a second lead screw; 7604. a second limit loop bar; 77. a finish machining mechanism; 7701. a fourth motor; 7702. a detachable workpiece; 7703. a telescopic wire.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Example 1

As shown in fig. 1, fig. 2, fig. 3 and fig. 8, a molding apparatus for 3D printing of artificial bone with polymer material comprises a machine body 1, a plane moving mechanism 2 horizontally disposed at the top of the machine body 1, a first linear driving mechanism 4 and a plurality of auxiliary guide rods 5 vertically disposed in the machine body 1, an extrusion head 3 connected to a moving terminal of the plane moving mechanism 2, a printing platform 6 screwed on the first linear driving mechanism 4, and a surface processing mechanism 7 disposed in the machine body 1, wherein the surface processing mechanism 7 is used for finish-machining of the surface of the artificial bone;

the surface treatment mechanism 7 comprises second linear driving mechanisms 71 symmetrically arranged in the machine body 1, a ring frame 72 in threaded connection with the plurality of second linear driving mechanisms 71, an annular chamber 7203 arranged in the ring frame 72, a surrounding type driving mechanism 74 arranged in the annular chamber 7203, a pressure adjusting mechanism 75 connected to the surrounding type driving mechanism 74, a plurality of limiting mechanisms 73 and displacement adjusting mechanisms 76 connected to the inner circular surface of the ring frame 72, and a finish machining mechanism 77 arranged at one end of the displacement adjusting mechanism 76, the displacement adjusting mechanism 76 is movably connected with the ring frame 72, the displacement adjusting mechanism 76 is connected with the pressure adjusting mechanism 75, and the ring frame 72 is positioned above the printing platform 6;

the surrounding type driving mechanism 74 is used for driving the pressure adjusting mechanism 75, the displacement adjusting mechanism 76 and the finish machining mechanism 77 to rotate around the central axis of the ring frame 72;

the pressure adjusting mechanism 75 is used to adjust the amount of extension of the displacement adjusting mechanism 76 and the pressure applied to the printed artificial bone by the finishing mechanism 77.

First linear drive mechanism 4 and second linear drive mechanism 71 are connected with a plurality of bracing piece 7201 including locating the driving motor of organism 1 bottom, connecting at the screw rod of driving motor output shaft end on the outer wall of ring frame 72, the one end of bracing piece 7201 be connected with screw rod threaded connection's slider 7202.

It should be noted that, after the artificial bone is formed on the printing platform 6, the limiting mechanism 73 therein can be controlled to limit and fix the formed artificial bone, then the displacement adjusting mechanism 76 is controlled by the pressure adjusting mechanism 75 therein to move the finish machining mechanism 77 to the position to be processed on the surface of the artificial bone, then the machining pressure applied on the surface of the artificial bone is adjusted by the pressure adjusting mechanism 75 for finish machining, so as to be adapted to the artificial bones made of different materials, so that the machining precision is greatly improved, and meanwhile, the position of the finish machining mechanism 77 for machining the artificial bone can be controlled by the surrounding type driving mechanism 74, so that the process of finish machining on the surface of the artificial bone is more accurate and stable, and the artificial bone is suitable for the artificial bones made of different specifications and materials.

As shown in fig. 3, 4, 6 and 9, the limiting mechanism 73 includes a first bellows 7303 connected to the inner circumferential surface of the ring frame 72, a first limiting sleeve 7305 connected to one end of the first bellows 7303, a first motor 7301 connected to the inner wall of the annular chamber 7203, a coupling 7302 connected to an output shaft end of the first motor 7301, and a first lead screw 7304 connected to one end of the coupling 7302, and the first lead screw 7304 is in threaded connection with the first limiting sleeve 7305.

It should be noted that, after the artificial bone is formed on the printing platform 6, the process of limiting and fixing the artificial bone through the limiting mechanism 73 is as follows, the first lead screw 7304 is driven to rotate by the first motor 7301, the first lead screw 7304 is driven to rotate and then drives the first limiting loop bar 7305 to move towards the artificial bone along the axial direction of the first lead screw 7304 until the first limiting loop bar 7305 is blocked after contacting the artificial bone, at this time, the first motor 7301 stops working, the first limiting loop bars 7305 are all tightly pressed against the artificial bone, so that the artificial bone is in a stable state on the printing platform 6, and then the finishing mechanism 77 is controlled to move to the corresponding position of the artificial bone to perform finishing treatment, such as polishing or polishing.

As shown in fig. 3 and 4, the wraparound driving mechanism 74 includes an inner ring 7401 disposed in the annular chamber 7203, an annular gear 7404 connected to the inner ring 7401, a second motor 7402 connected to the inner wall of the annular chamber 7203, a first conductive member 7405 and a second conductive member 7406, a transmission gear 7403 connected to an output shaft end of the second motor 7402 and engaged with the annular gear 7404, and a first conductive ring 7407 and a second conductive ring 7408 disposed on the inner ring 7401 in a penetrating manner, wherein the first conductive member 7405 and the second conductive member 7406 are respectively in contact with the first conductive ring 7407 and the second conductive ring 7408, and the first conductive member 7405 and the second conductive member 7406 are both connected with an external power line 7409.

It should be noted that, as described above, the finishing mechanism 77 starts to perform appropriate grinding or polishing treatment on the surface of the artificial bone after contacting the artificial bone, in the process, the finishing mechanism 77 may be driven by the surrounding driving mechanism 74 to perform surrounding processing around the artificial bone, or the finishing mechanism 77 may be moved to a designated position on the surface of the artificial bone by cooperating with the second linear driving mechanism 71 to perform processing treatment, when the surrounding driving mechanism 74 adjusts the position of the finishing mechanism 77, the second motor 7402 therein drives the transmission gear 7403 to rotate, the transmission gear 7403 drives the ring gear 7404 and the inner ring 7401 to move in the same direction and at the same angle, the inner ring 7401 drives the pressure adjusting mechanism 75 connected thereto and the displacement adjusting mechanism 76 movably connected to the ring frame 72 to move after rotating, and the displacement adjusting mechanism 76 drives the finishing mechanism 77 connected thereto to perform same direction and same angle after moving, With the removal of angle, and second straight line actuating mechanism 71 can drive whole ring frame 72 and move in longitudinal direction, reaches the effect that cooperation surrounding type actuating mechanism 74 adjusted the finish machining, can make finish machining mechanism 77 can remove to any position department on the artificial bone lateral wall and process it.

As shown in fig. 3, 4, 5 and 6, the pressure adjusting mechanism 75 includes a third motor 7501 and an electric push rod 7502 connected to the inner ring 7401, a pressure applying ring 7511, a driving ring 7507 and a fixing ring 7504 sequentially sleeved on an output shaft of the third motor 7501, a limit ring 7510 movably connected to an outer wall of the pressure applying ring 7511, a connecting rod 7512 connected to the outer wall of the limit ring 7510, a first damping layer 7505 connected to one end of the fixing ring 7504, a second damping layer 7506 and a plurality of arc-shaped limit blocks 7508 respectively connected to two ends of the driving ring 7507, a spring 7509 connected between the arc-shaped limit blocks 7508 and the pressure applying ring 7511, an insert 7513 connected to the output shaft of the third motor 7501, and a connecting cylinder cover 7503 connected to the outer circumferential surface of the fixing ring 7504, the connecting cylinder cover 7503 is connected with the displacement adjusting mechanism 76, the connecting rod 7512 is connected with the output end of the electric push rod 7502, and the first damping layer 7505 is in contact with the second damping layer 7506; the displacement adjusting mechanism 76 comprises a driven ring body 7601 movably connected to the inner circular surface of the ring frame 72, a second screw rod 7603 penetrating through the driven ring body 7601, a second corrugated pipe 7602 connected to the driven ring body 7601, and a second limit sleeve rod 7604 connected to one end of the second corrugated pipe 7602, one end of the second screw rod 7603 extends into the annular chamber 7203 and is fixedly connected with the connecting cylinder cover 7503, and the second screw rod 7603 is in threaded connection with the second limit sleeve rod 7604.

It should be noted that the pressure adjusting mechanism 75 has two adjusting processes, one is to control the elongation of the displacement adjusting mechanism 76, and the other is to control the pressure exerted on the artificial bone by the finishing mechanism 77, so as to control the change of the polishing force, and adapt to different materials or different design accuracies, specifically:

firstly, when the elongation of the displacement adjusting mechanism 76 is controlled to adjust the position of the finish machining mechanism 77, the output shaft of the third motor 7501 rotates and drives the insert 7513 connected thereto to rotate in the same direction, and the insert 7513 rotates and drives the arc-shaped limit block 7508 and the drive ring 7507 to rotate in the same direction and at the same angle, because the second damping layer 7506 on the drive ring 7507 and the first damping layer 7505 on the fixed ring 7504 contact each other and have a certain friction torque, when the drive ring 7507 rotates, the fixed ring 7504 and the connecting cylinder cover 7503 are driven to rotate in the same direction and at the same angle by the friction torque, the connecting cylinder cover 7503 rotates and then drives the second lead screw 7603 in the displacement adjusting mechanism 76 to rotate, the second lead screw 7603 rotates and then drives the second limit sleeve 7604 to move towards the position of the artificial bone until the finish machining mechanism 77 on the second lead screw 7604 contacts the artificial bone, and at this time the second limit sleeve 7604 is subjected to resistance, the resistance force is applied to the second lead screw 7603, so that the second lead screw 7603 is subjected to corresponding reverse moment, the direction of the moment is opposite to the direction of the friction moment applied to the fixing ring 7504 by the driving ring 7507, when the friction moment is equal to the reverse moment, the driving ring 7507 is driven by the output shaft of the third motor 7501 to idle, at this time, the pressure applied to the artificial bone by the finishing mechanism 77 is constant, and the surface of the artificial bone can be ground or polished by the finishing mechanism 77;

secondly, when the pressure applied to the artificial bone by the finish machining mechanism 77 is adjusted, the electric push rod 7502 drives the limiting ring 7510 to move and drives the pressing ring 7511 movably connected to the limiting ring 7510 to move, the pressing ring 7511 moves to enable the spring 7509 to be compressed or extended, when the spring 7509 is compressed, the pressure applied to the arc-shaped limiting block 7508 and the driving ring 7507 by the spring 7509 is increased, the friction torque between the first damping layer 7505 and the second damping layer 7506 is increased, the pressure applied to the surface of the artificial bone by the finish machining mechanism 77 is increased, the adjustment of the grinding pressure of the finish machining mechanism 77 for grinding the artificial bone is controlled, and the finish machining mechanism can be suitable for the artificial bones made of different materials and the grinding or polishing requirements.

It should be noted that, the specific calculation formula and the variable are in the prior art, and both are changed according to actual design, and are not described herein again, and the connection between the second lead screw 7603 and the driven ring 7601 is a limiting movable connection, that is, the second lead screw 7603 can only rotate along with the connecting cylinder cover 7503 and cannot move along the axial direction thereof.

As shown in fig. 7, the finishing mechanism 77 includes a fourth motor 7701 disposed at an end of the second position-limiting sleeve rod 7604 far away from the second corrugated tube 7602, and a detachable workpiece 7702 connected to an output shaft end of the fourth motor 7701, wherein the output shaft of the fourth motor 7701 penetrates through the second position-limiting sleeve rod 7604 and extends to the outside of the second position-limiting sleeve rod 7604.

It should be noted that, when the finishing mechanism 77 performs finishing treatment on the surface of the artificial bone, the fourth motor 7701 drives the detachable processing member 7702 to perform treatment on the surface of the artificial bone, and the detachable processing member 7702 includes a polishing member and a polishing member, both of which can be detachably connected to an output shaft end of the fourth motor 7701, which is the prior art.

As shown in fig. 4, 6, and 7, wiring holes are formed in the wall of the second position-limiting loop bar 7604 and the wall of the driven ring body 7601, two ends of the wiring hole formed in the second position-limiting loop bar 7604 are respectively communicated with the inner space of the second corrugated tube 7602 and the inner space of the second position-limiting loop bar 7604, two ends of the wiring hole formed in the driven ring body 7601 are respectively communicated with the inner space of the second corrugated tube 7602 and the inner space of the ring chamber 7203, a telescopic wire 7703 is formed in the second corrugated tube 7602, one end of the telescopic wire 7703 penetrates through the correspondingly formed wiring hole to be electrically connected with the fourth motor 7701, and the other end penetrates through the correspondingly formed wiring hole to be electrically connected with the first conductive ring 7407 and the second conductive ring 7408.

It should be noted that, when the finishing mechanism 77 is controlled to perform continuous circular grinding or polishing on the surface of the artificial bone, in order to continuously supply power to the pressure adjusting mechanism 75 and the finishing mechanism 77, as described above, the first conductive ring 7407 and the second conductive ring 7408 on the inner ring body 7401 can be continuously powered on during the rotation process under the power-on action of the first conductive member 7405 and the second conductive member 7406, and the third motor 7501, the electric push rod 7502 and the fourth motor 7701 in the finishing mechanism 77 are all powered on by the first conductive ring 7407 and the second conductive ring 7408, so that each electric device can be always powered on during the continuous rotation process, and in order to match the position change of the fourth motor 7701, the fourth motor 7701 is powered on by the retractable wire 7703, so that the effect of adapting to the position change of the finishing mechanism 77 can be achieved, and the retractable wire 7703 is located in the second corrugated tube 7602, the influence of external factors on the electric wire can be avoided;

it should be noted that, the first corrugated tube 7303 and the second corrugated tube 7602 are used to achieve the effect of preventing the first limiting loop bar 7305 and the second limiting loop bar 7604 from rotating along with the first lead screw 7304 and the second lead screw 7603, so that the lead screw can be protected while limiting, and external dust or residual materials on the extrusion head 3 are prevented from falling on the lead screw, which is safe and stable.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Claims

1. The utility model provides a forming device of artifical bone is printed to macromolecular material 3D which characterized in that: the device comprises a machine body, a plane moving mechanism horizontally arranged at the top of the machine body, a first linear driving mechanism and a plurality of auxiliary guide rods which are vertically arranged in the machine body, an extrusion head connected to a moving terminal of the plane moving mechanism, a printing platform in threaded connection with the first linear driving mechanism, and a surface treatment mechanism arranged in the machine body, wherein the surface treatment mechanism is used for finish machining and printing the surface of the artificial bone;

the surface treatment mechanism comprises second linear driving mechanisms symmetrically arranged in the machine body, a ring frame in threaded connection with the second linear driving mechanisms, an annular chamber arranged in the ring frame, a surrounding type driving mechanism arranged in the annular chamber, a pressure adjusting mechanism connected to the surrounding type driving mechanism, a plurality of limiting mechanisms and displacement adjusting mechanisms connected to the inner circular surface of the ring frame, and a finish machining mechanism arranged at one end of the displacement adjusting mechanism, wherein the displacement adjusting mechanism is movably connected with the ring frame and connected with the pressure adjusting mechanism, and the ring frame is positioned above the printing platform;

the pressure adjusting mechanism is used for adjusting the elongation of the displacement adjusting mechanism and the pressure applied to the printed artificial bone by the finish machining mechanism.

2. The molding device for the 3D printing of the artificial bone made of the high polymer material according to claim 1, wherein: the first linear driving mechanism and the second linear driving mechanism comprise driving motors arranged at the bottom of the machine body and screw rods connected to the output shaft ends of the driving motors, a plurality of supporting rods are connected to the outer wall of the ring frame, and one ends of the supporting rods are connected with sliding blocks in threaded connection with the screw rods.

3. The molding device for the 3D printing of the artificial bone made of the high polymer material according to claim 2, wherein: the limiting mechanism comprises a first corrugated pipe connected to the inner circular surface of the ring frame, a first limiting sleeve rod connected to one end of the first corrugated pipe, a first motor connected to the inner wall of the annular chamber, a coupler connected to the output shaft end of the first motor, and a first lead screw connected to one end of the coupler, and the first lead screw is in threaded connection with the first limiting sleeve rod.

4. The forming device for the 3D printing of the artificial bone by the high polymer material according to claim 3, characterized in that: the surrounding type driving mechanism comprises an inner ring body arranged in the annular cavity chamber, a ring gear connected to the inner ring body, a second motor connected to the inner wall of the annular cavity chamber, a first conductive piece and a second conductive piece, a transmission gear connected to the output shaft end of the second motor and meshed with the ring gear, and a first conductive ring and a second conductive ring which are arranged on the inner ring body in a penetrating mode, wherein the first conductive piece and the second conductive piece are respectively in contact with the first conductive ring and the second conductive ring, and the first conductive piece and the second conductive piece are both connected with an external power supply line.

5. The forming device for the 3D printing of the artificial bone made of the high polymer material according to claim 4, characterized in that: pressure adjustment mechanism establishes in proper order including connecting third motor and electric putter on interior ring member and establishes the pressure ring of applying on third motor output shaft, drive ring and solid fixed ring, swing joint spacing ring on the pressure ring outer wall, connect the connecting rod on the spacing ring outer wall, connect the first damping layer in solid fixed ring one end, connect second damping layer and a plurality of arc stopper at the drive ring both ends respectively, connect the spring between arc stopper and the pressure ring, connect the inserted block on third motor output shaft and connect the connecting cylinder cover on solid fixed ring disc outward, connecting cylinder cover and displacement adjustment mechanism connect, connecting rod and electric putter's output is connected, first damping layer and second damping layer contact.

6. The molding device for the 3D printing of the artificial bone made of the high polymer material according to claim 5, wherein: the displacement adjusting mechanism comprises a driven ring body movably connected to the inner circular surface of the ring frame, a second lead screw penetrating through the driven ring body, a second corrugated pipe connected to the driven ring body, and a second limiting sleeve rod connected to one end of the second corrugated pipe, one end of the second lead screw extends into the annular chamber and is fixedly connected with the connecting cylinder cover, and the second lead screw is in threaded connection with the second limiting sleeve rod.

7. The forming device for the 3D printing of the artificial bone made of the high polymer material according to claim 6, characterized in that: finish machining mechanism is including locating the fourth motor of keeping away from the one end department of second bellows in the second stop collar pole and connecting the detachable machined part at fourth motor output shaft end, the output shaft of fourth motor runs through the outside of second stop collar pole and extending to the second stop collar pole.

8. The molding device for the 3D printing of the artificial bone made of the high polymer material according to claim 7, wherein: the wiring hole has all been seted up in the wall of second spacing loop bar and the wall of driven ring body, set up in the second spacing loop bar the both ends in wiring hole communicate with second corrugated pipe inner space and second spacing loop bar inner space respectively, set up in the driven ring body the both ends in wiring hole communicate with second corrugated pipe inner space and annular chamber inner space respectively, are equipped with flexible electric wire in the second bellows, and the one end of flexible electric wire is passed the wiring hole of corresponding setting and is connected with the fourth motor electricity, and the other end passes the wiring hole of corresponding setting and is connected with first conducting ring and second conducting ring electricity respectively.