CN217066710U - Support, extrusion device and 3D printer - Google Patents
Support, extrusion device and 3D printer Download PDFInfo
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- CN217066710U CN217066710U CN202120973377.0U CN202120973377U CN217066710U CN 217066710 U CN217066710 U CN 217066710U CN 202120973377 U CN202120973377 U CN 202120973377U CN 217066710 U CN217066710 U CN 217066710U
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Abstract
The utility model discloses a support, an extrusion device and a 3D printer, wherein the line structure of the support is a triple helix structure, the extrusion device comprises a driving mechanism, a first material cylinder, a second material cylinder and a third material cylinder which are sequentially nested, the first material cylinder stores first slurry, the second material cylinder stores second slurry, the third material cylinder stores third slurry, the first slurry is discharged through a first output channel, the second slurry is discharged through a second output channel, the third slurry is discharged through a third output channel, under the driving action of the driving mechanism, the first output channel, the second output channel and the third output channel are rotationally discharged, the first output channel, the second output channel and the third output channel are circumferentially distributed around a central axis of rotation, further, the first slurry, the second slurry and the third slurry are mutually wound to form a triple helix structure, the support with the line structure being the triple helix structure is finally formed through layer-by-layer superposition printing, this utility model is used for the defective 3D of treatment bone tissue prints support technical field.
Description
Technical Field
The utility model relates to a 3D prints support technical field for treating bone tissue is defective, especially relates to a support, extrusion device and 3D printer.
Background
3D printing degradable ceramic scaffolds is a new current method for treating large-area bone tissue defects. Compared with autologous bone transplantation and allogeneic bone transplantation, the bone tissue regeneration repair device has the characteristics of controllable structure, rapidness in manufacturing, wide source, no host rejection reaction and the like, can realize bone tissue defect filling after being implanted into a body, recovers the integrity of the tissue structure of a patient, more importantly can promote the formation of new bone tissue and new blood vessels, and finally realizes the regenerative repair of the damaged bone tissue.
In modern medicine, 3D printing technology is often used to prepare bone repair scaffolds because of its advantages of simple operation, high accuracy of printing scaffolds, controllable printing process, etc. The required bone grafting scaffold is obtained by completing modeling of the scaffold structure to be printed in three-dimensional design software, guiding the modeling into a computer of 3D printing equipment, printing layer by layer, fixing, drying, sintering and the like. At present, the structural design of a 3D printing support is mainly focused on a single-layer structure, a double-layer structure, a core-shell structure and a hollow (porous) structure.
Although the current common 3D printing support structure such as a single-layer structure, a multi-layer structure and a porous structure has a simple preparation process and convenient slurry preparation, the support structure has certain defects. The bracket with a single-layer or double-layer structure mainly mixes slurry mechanically, and the advantages and performances of different slurries are compromised; the bracket of the core-shell structure breaks through in the form of fiber, but the core-shell structure has the sequential contact with body fluid, the degradation time and the host action time are also in sequence, and the core-shell interface has certain influence on the mechanical property; the hollow structure sacrifices the mechanical property to obtain larger porosity; in addition, the existing cell-loaded tissue scaffold has high osteogenic activity, but the mechanical property of the scaffold is far lower than the hardness of the conventional bone.
Therefore, a proper support structure, and a corresponding extrusion device and a printer of the printing support are very important.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a support, adopt the lines structure of three spirals, realize the improvement of support mechanical properties etc..
The utility model also provides an extrusion device and 3D printer can print out the support that has three spiral line structures to realize mechanical properties's improvement etc.
According to the utility model discloses an embodiment of the first aspect provides a support, the support is printed the shaping preparation through 3D for the treatment bone tissue is defective, the lines structure of support is three helical structure, three helical structure include first thick liquids, second thick liquids and the third thick liquids of intertwine setting.
The bracket at least has the following beneficial effects: due to the three-spiral structure of the printing line, an internal interlocking mechanism (a node and an internal friction mechanism) exists in the process of receiving external load, so that the printing line not only can bear larger external load, but also has good compressibility of the support, so that the mechanical property of the printing line can be improved on the physical structure, and the printing line has better toughness.
According to a second aspect of the present invention, there is provided an extrusion apparatus for manufacturing the above-mentioned bracket, comprising: the first material cylinder is used for storing first slurry and is connected with a first output channel; the second material cylinder is used for storing second slurry, a second output channel is connected with the second material cylinder, the first material cylinder is arranged in the second material cylinder, and the first material cylinder is fixedly connected with the second material cylinder; the third material cylinder is used for storing third slurry, a third output channel is connected with the third material cylinder, the second material cylinder is arranged in the third material cylinder, and the second material cylinder is fixedly connected with the third material cylinder; the driving mechanism is used for driving the first material cylinder, the second material cylinder and the third material cylinder to rotate so as to drive the first output channel, the second output channel and the third output channel to rotationally discharge, and the first output channel, the second output channel and the third output channel are circumferentially distributed around the central axis of rotation of the first material cylinder, the second material cylinder and the third material cylinder, so that the first slurry, the second slurry and the third slurry are mutually wound to form a triple-spiral structure.
The extrusion device at least has the following beneficial effects: the extrusion device is arranged on a printing head of a 3D printer, a first material cylinder is used for storing a first slurry, a second material cylinder is used for storing a second slurry, a third material cylinder is used for storing a third slurry, the first slurry is discharged through a first output channel, the second slurry is discharged through a second output channel, the third slurry is discharged through a third output channel, the first output channel, the second output channel and the third output channel are driven by a driving mechanism to rotate and discharge during discharging, the first output channel, the second output channel and the third output channel are circumferentially distributed around a rotating central axis, the first slurry, the second slurry and the third slurry are further mutually wound to form a three-spiral structure, a support with a three-spiral structure is finally formed through layer-by-layer superposition printing, and the support with the three-spiral line structure is opposite to the support structures such as the current single-layer structure, double-layer structure and core-shell structure, the stent has better mechanical property and better toughness.
According to the utility model discloses extrusion device of second aspect embodiment, the bottom of first feed cylinder is equipped with a first through-hole, for first output channel passes, the bottom of second feed cylinder is equipped with two second through-holes, for first output channel with second output channel passes, the bottom of third feed cylinder is equipped with three third through-hole, for first output channel the second output channel with third output channel passes.
The extrusion device of the second aspect of the present invention, wherein the first cartridge, the second cartridge and the third cartridge are connected to a pressurizing device, the pressurizing device is used to apply pressure to the inside of the first cartridge, the second cartridge and the third cartridge, so as to extrude the first slurry, the second slurry and the third slurry.
According to the utility model discloses the extrusion device of second aspect embodiment, pressure device is the air pump.
According to the utility model discloses extrusion device, extrusion device well includes the urceolus, first feed cylinder the second feed cylinder with the third feed cylinder rotationally install in the urceolus, the bottom of urceolus has the through-hole, for first output channel the second output channel with the third output channel passes.
According to the utility model discloses the second aspect embodiment extrusion device, extrusion device still includes the syringe needle, the hollow structure of syringe needle for running through, the upper end of syringe needle is connected the through-hole of the bottom of urceolus, the bottom of syringe needle has the discharge gate, first output channel second output channel with third output channel passes the discharge gate, the discharge gate is used for making first output channel second output channel with third output channel leans on mutually.
According to the utility model discloses extrusion device of second aspect embodiment, be equipped with the opening on the lateral wall of urceolus, the opening part is provided with the detachable visor.
According to the utility model discloses the second aspect embodiment extrusion device, the third feed cylinder with be equipped with at least one bearing between the inner wall of urceolus.
According to the utility model discloses the second aspect embodiment extrusion device, the bottom of third feed cylinder is connected with the base, the base has the ring gear, actuating mechanism includes motor and gear, the gear with ring gear meshing transmission, the motor is used for the drive the gear is rotatory, in order to drive the ring gear is rotatory, and then drives the third feed cylinder the second feed cylinder with first feed cylinder is rotatory.
According to a third aspect of the present invention, there is provided a 3D printer, including the above-mentioned extrusion device.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of a line structure of a bracket according to an embodiment of the present invention;
fig. 2 is a schematic plan view of an extrusion apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an external structure of an extrusion apparatus according to an embodiment of the present invention;
fig. 4 is an elevation view of the external structure of an extrusion apparatus according to an embodiment of the present invention;
fig. 5 is a top view of a first cartridge in accordance with an embodiment of the present invention;
fig. 6 is a top view of a second cartridge according to an embodiment of the invention;
fig. 7 is a top view of a third cartridge according to an embodiment of the present invention;
reference numerals: the first cartridge 11, the first through hole 111, the second cartridge 12, the second through hole 121, the third cartridge 13, the third through hole 131, the outer cartridge 30, the opening 31, the protective cover 32, the driving mechanism 40, the motor 41, the gear 42, the connecting member 50, the first output channel 61, the second output channel 62, the third output channel 63, the needle 70, the base 80, the bearing 90, the first slurry 100, the second slurry 200, and the third slurry 300.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, an embodiment of the present invention provides a stent, which is manufactured by 3D printing and forming for treating bone tissue defects, and a line structure of the stent is a triple helix structure including a first paste 100, a second paste 200, and a third paste 300, which are intertwined with each other.
With reference to fig. 2 to 7, the embodiment of the present invention further provides an extrusion apparatus for manufacturing the above-mentioned bracket, including a driving mechanism 40, and a first material cylinder 11, a second material cylinder 12, and a third material cylinder 13 which are sequentially nested, where the first material cylinder 11 is used for storing a first slurry 100, and the first material cylinder 11 is connected to a first output channel 61; the second material cylinder 12 is used for storing a second slurry 200, the second material cylinder 12 is connected with a second output channel 62, the first material cylinder 11 is arranged in the second material cylinder 12, and the first material cylinder 11 is fixedly connected with the second material cylinder 12; the third material cylinder 13 is used for storing a third slurry 300, the third material cylinder 13 is connected with a third output channel 63, the second material cylinder 12 is arranged in the third material cylinder 13, and the second material cylinder 12 is fixedly connected with the third material cylinder 13; the driving mechanism 40 can drive the first barrel 11, the second barrel 12 and the third barrel 13 to rotate so as to drive the first output channel 61, the second output channel 62 and the third output channel 63 to rotationally discharge, the first output channel 61, the second output channel 62 and the third output channel 63 are circumferentially distributed around the central axis of rotation of the first barrel 11, the second barrel 12 and the third barrel 13, so that the first slurry 100, the second slurry 200 and the third slurry 300 are mutually wound to form a triple helix structure, specifically, the first output channel 61, the second output channel 62 and the third output channel 63 are all pipes, and the first barrel 11 and the second barrel 12 and the third barrel 13 are connected through the connecting piece 50.
The extrusion device of the embodiment is installed on a printing head of a 3D printer, a first slurry 100 is stored through a first material cylinder 11, a second slurry 200 is stored in a second material cylinder 12, a third slurry 300 is stored in a third material cylinder 13, the first slurry 100 is discharged through a first output channel 61, the second slurry 200 is discharged through a second output channel 62, the third slurry 300 is discharged through a third output channel 63, and under the driving action of a driving mechanism 40 during discharging, the first output channel 61, the second output channel 62 and the third output channel 63 are rotated to discharge, the first output channel 61, the second output channel 62 and the third output channel 63 are circumferentially distributed around a rotating central axis, so that the first slurry 100, the second slurry 200 and the third slurry 300 are mutually wound to form a three-spiral structure, and a support with a three-spiral structure is finally formed through layer-by layer overlapping printing.
The support of the three spiral line structures of this embodiment is inspired with the three spiral structure of microcosmic collagen, imitates collagen spiral structure, makes the breakthrough on the initial line structural design of support, improves through the extrusion device to 3D printing apparatus, realizes printing the three spiral structure of support.
The support with the three-spiral line structure has the following advantages: (1) the three slurries are independently controllable due to the spiral structure of the stent, and the release performance and the bone and blood vessel growth promoting performance of the three slurries can be independently regulated and controlled; (2) due to the three-spiral structure of the printing line, an internal interlocking mechanism (a node and an internal friction mechanism) exists in the process of receiving external load, so that the printing line not only can bear larger external load, but also has good compressibility of the support, so that the mechanical property of the printing line can be improved on the physical structure, and the printing line has better toughness; (3) on this basis, this structure can also realize antibiotic medicine carrying, and influence mechanism's such as metal ion interpolation individual regulation and control, contrast research are the great innovation to current 3D printing bone repair support structural design theory.
It is understood that the specific components of the first slurry 100, the second slurry 200 and the third slurry 300 can be set as desired, and generally include: ceramics such as calcium phosphorus base, calcium silicon base and the like, polymers such as collagen, polycaprolactone and the like and related stimulating factors (metal ions such as copper, strontium and the like and biomolecules such as BMP, VEGF and the like) are mixed and added with dispersing agent, adhesive and the like on the basis to improve the printability of the slurry and adjust the solid content.
In this embodiment, the bottom of the first barrel 11 is provided with a first through hole 111 for the first output channel 61 to pass through, see fig. 5; the bottom of the second barrel 12 is provided with two second through holes 121 for the first output channel 61 and the second output channel 62 to pass through, see fig. 6; the bottom of the third barrel 13 is provided with three third through holes 131 for the first output channel 61, the second output channel 62 and the third output channel 63 to pass through, referring to fig. 7.
In some embodiments, a pressurizing device for applying pressure to the inside of the first, second, and third barrels 11, 12, and 13 to extrude the first, second, and third slurries 100, 200, and 300 is connected to the first, second, and third barrels 11, 12, and 13. Specifically, the pressurizing device adopts an air pump.
It will of course be appreciated that the pressurizing means may alternatively be a piston or other structure, provided that extrusion of the slurry is achieved.
In some embodiments, the extruding apparatus preferably includes an outer cylinder 30, the first barrel 11, the second barrel 12 and the third barrel 13 are rotatably installed in the outer cylinder 30, and the driving mechanism 40 is also installed in the outer cylinder 30, and the bottom of the outer cylinder 30 has a through hole for passing the first output passage 61, the second output passage 62 and the third output passage 63.
In some embodiments, the extruding device further includes a needle 70, the needle 70 is a hollow structure penetrating through the needle 70, the upper end of the needle 70 is connected to a through hole at the bottom of the outer cylinder 30, the bottom of the needle 70 is provided with a discharge hole, the first output channel 61, the second output channel 62 and the third output channel 63 penetrate through the discharge hole, and the diameter of the discharge hole is set to be small, so that the first output channel 61, the second output channel 62 and the third output channel 63 abut against each other, thereby fixing the relative positions of the three output channels, avoiding the separation of the three output channels in the rotating process, and improving the stability of forming the triple-helix structure.
In some embodiments, at least one bearing 90 is disposed between the third barrel 13 and the inner wall of the outer barrel 30, and in particular, one bearing 90 is respectively installed at the upper and lower portions of the third barrel 13 to make the rotation of the third barrel 13 smoother.
In some embodiments, three cartridges are disposed on the upper half of the outer barrel 30, the driving mechanism 40 is disposed on the lower half of the outer barrel 30, wherein the base 80 is connected to the bottom of the third cartridge 13, the base 80 has an internal gear, the driving mechanism 40 includes a motor 41 and a gear 42, the gear 42 is in meshing transmission with the internal gear, and the motor 41 is used for driving the gear 42 to rotate so as to drive the internal gear to rotate, and further drive the third cartridge 13, the second cartridge 12 and the first cartridge 11 to rotate. The gear 42 is adopted to drive the three charging barrels to rotate, and the structure is compact. The density of the three-spiral line structure can be adjusted to a certain extent by controlling the rotation speed of the motor 41, and the motor 41 can specifically adopt a stepping motor.
In some embodiments, an opening 31 is provided on the sidewall of the outer barrel 30, and a detachable protective cover 32 is provided at the opening 31. The protective cover 32 is removed to facilitate installation of the drive mechanism 40 through the opening 31 and to allow maintenance of the drive mechanism 40.
According to a third aspect of the present invention, there is provided a 3D printer, including the above-mentioned extrusion device. The printer comprising the extrusion device controls the extrusion device to move and extrude pulp in three dimensions of the X direction, the Y direction and the Z direction, and realizes printing and forming of the support with the line structure in a three-spiral structure.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. The utility model provides a support, the support is printed the shaping preparation through 3D for the treatment bone tissue is defective, its characterized in that: the line structure of support is three helical structure, three helical structure include first thick liquids, second thick liquids and the third thick liquids of intertwine setting.
2. An extrusion apparatus for making the stent of claim 1, comprising:
the first material cylinder is used for storing first slurry and is connected with a first output channel;
the second material cylinder is used for storing second slurry, a second output channel is connected with the second material cylinder, the first material cylinder is arranged in the second material cylinder, and the first material cylinder is fixedly connected with the second material cylinder;
the third material cylinder is used for storing third slurry, a third output channel is connected with the third material cylinder, the second material cylinder is arranged in the third material cylinder, and the second material cylinder is fixedly connected with the third material cylinder;
the driving mechanism is used for driving the first material cylinder, the second material cylinder and the third material cylinder to rotate so as to drive the first output channel, the second output channel and the third output channel to rotationally discharge, and the first output channel, the second output channel and the third output channel are circumferentially distributed around the central axis of rotation of the first material cylinder, the second material cylinder and the third material cylinder, so that the first slurry, the second slurry and the third slurry are mutually wound to form a triple-spiral structure.
3. Extrusion apparatus according to claim 2, wherein: the bottom of the first material cylinder is provided with a first through hole for the first output channel to pass through, the bottom of the second material cylinder is provided with two second through holes for the first output channel and the second output channel to pass through, and the bottom of the third material cylinder is provided with three third through holes for the first output channel, the second output channel and the third output channel to pass through.
4. Extrusion apparatus according to claim 2, wherein: a pressurizing device is connected to the first, second, and third barrels, and is configured to apply pressure to the inside of the first, second, and third barrels to extrude the first, second, and third slurries.
5. Extrusion apparatus according to claim 4, wherein: the pressurizing device is an air pump.
6. Extrusion apparatus according to claim 2, wherein: the extruding device also comprises an outer barrel, wherein the first material barrel, the second material barrel and the third material barrel are rotatably arranged in the outer barrel, and the bottom of the outer barrel is provided with a through hole for the first output channel, the second output channel and the third output channel to pass through.
7. Extrusion apparatus according to claim 6, wherein: the extruding device further comprises a needle head, the needle head is of a penetrating hollow structure, the upper end of the needle head is connected with the through hole in the bottom of the outer barrel, a discharge hole is formed in the bottom of the needle head, the first output channel, the second output channel and the third output channel penetrate through the discharge hole, and the discharge hole is used for enabling the first output channel, the second output channel and the third output channel to lean against each other.
8. Extrusion apparatus according to claim 6, wherein: the lateral wall of the outer barrel is provided with an opening, and the opening is provided with a detachable protective cover.
9. Extrusion apparatus according to any one of claims 2 to 8, wherein: the bottom of the third material cylinder is connected with a base, the base is provided with an inner gear ring, the driving mechanism comprises a motor and a gear, the gear is in meshing transmission with the inner gear ring, the motor is used for driving the gear to rotate so as to drive the inner gear ring to rotate, and then the third material cylinder, the second material cylinder and the first material cylinder are driven to rotate.
10. The utility model provides a 3D printer which characterized in that: comprising an extrusion apparatus according to any one of claims 2 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120973377.0U CN217066710U (en) | 2021-05-08 | 2021-05-08 | Support, extrusion device and 3D printer |
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| CN202120973377.0U CN217066710U (en) | 2021-05-08 | 2021-05-08 | Support, extrusion device and 3D printer |
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| CN217066710U true CN217066710U (en) | 2022-07-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115887759A (en) * | 2022-12-08 | 2023-04-04 | 广东省科学院生物与医学工程研究所 | Spiral piezoelectric support and preparation method and application thereof |
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2021
- 2021-05-08 CN CN202120973377.0U patent/CN217066710U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115887759A (en) * | 2022-12-08 | 2023-04-04 | 广东省科学院生物与医学工程研究所 | Spiral piezoelectric support and preparation method and application thereof |
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