CN215550973U - A shower nozzle device and 3D printer for printing many helical structure's support - Google Patents

Abstract

The utility model discloses a spray head device for printing a support with a multi-spiral structure and a 3D printer, wherein the spray head device comprises a shell, a storage component and a driving mechanism, the storage component comprises a charging barrel and a charging barrel cover which are detachably connected, at least one partition plate is arranged in the charging barrel of the storage component, so that at least two cavities are formed in the charging barrel, the charging barrel is sealed through the charging barrel cover, each charging barrel is respectively connected with a corresponding output channel, the driving mechanism drives the charging barrel to rotate to drive each output channel to rotate for discharging, each output channel is circumferentially distributed around the rotating axis of the charging barrel, so that each slurry is mutually wound to form the multi-spiral structure, the support with the multi-spiral structure is finally formed through layer-by-layer superposition printing, the support with the multi-spiral structure has better mechanical property compared with the existing support structure, and the storage component and the driving mechanism are arranged in the shell, the shell plays the guard action, and this utility model relates to a 3D prints support technical field for treating bone tissue is defective.

Description

A shower nozzle device and 3D printer for printing many helical structure's support

Technical Field

The utility model relates to the technical field of 3D printing supports for treating bone tissue defects, in particular to a nozzle device and a 3D printer for printing a support with a multi-spiral structure.

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 nozzle device and a printer of the printing support are very important.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve at least one of the technical problems in the prior art, and provides a nozzle device for printing a support with a multi-spiral structure and a 3D printer, which can print the support with the multi-spiral line structure to improve the mechanical property and the like.

According to an embodiment of the first aspect of the present invention, there is provided a head apparatus for printing a stent of a multi-helical structure, including: a housing; the storage component is arranged in the shell and comprises a charging barrel and a charging barrel cover which are detachably connected, the charging barrel cover is used for sealing the charging barrel, at least one partition plate is arranged in the charging barrel, the partition plate partitions the interior of the charging barrel to form at least two cavities, the cavities are used for storing slurry, and each cavity is connected with an output channel; and the driving mechanism is arranged in the shell and used for driving the charging barrel to rotate so as to drive the output channels to rotate and discharge materials, and the output channels are circumferentially distributed around the rotating axis of the charging barrel so as to enable the slurry output by the output channels to be mutually wound to form a multi-spiral structure.

The spray head device for printing the bracket with the multi-spiral structure at least has the following beneficial effects: this shower nozzle device is installed on the print head of 3D printer, be equipped with the baffle in storage component's the feed cylinder, make the inside at least two cavitys that form of feed cylinder, through feed cylinder lid sealed feed cylinder, corresponding delivery channel is connected respectively to each cavity, actuating mechanism drive feed cylinder is rotatory, it is rotatory ejection of compact to drive each delivery channel, each delivery channel is the circumference around the rotation axis of feed cylinder and distributes, thereby make each thick liquids intertwine and form many helical structure, it finally forms the support that the line structure is many helical structure to print through successive layer stack, the support that has many helical line structures is for present supporting structure, better mechanical properties has, storage component and actuating mechanism install in the shell, form a holistic module, the shell plays the guard action.

According to the nozzle device for printing the bracket with the multi-spiral structure, the driving mechanism comprises a driving component and a transmission component, the transmission component comprises a first transmission wheel and a second transmission wheel, the first transmission wheel is in transmission fit with the second transmission wheel, the second transmission wheel is fixedly connected with the material cylinder cover or the material cylinder, and the driving component is used for driving the first transmission wheel to rotate so as to drive the second transmission wheel to rotate and further drive the material cylinder and the material cylinder cover to rotate.

According to the spray head device for printing the bracket of the multi-spiral structure, the driving assembly comprises a rotating piece and an air blowing component, the air blowing component is used for blowing air to drive the rotating piece to rotate, and a rotating shaft is connected between the rotating piece and the first driving wheel.

According to the nozzle device for printing the bracket with the multi-spiral structure, the rotating piece is in the windmill structure and comprises a plurality of fan blades arranged in a radial mode.

According to the nozzle device for printing the bracket with the multi-spiral structure, the first driving wheel and the second driving wheel are bevel gears.

According to the spray head device for printing the support with the multi-spiral structure, the bottom of the shell is provided with the needle head, the needle head is provided with the through hole, the bottom of the needle head is in a pointed cone shape, and each output channel is limited in the needle head.

According to the nozzle device for printing supports of a multi-spiral structure, at least one bearing is connected between the cartridge and the inner wall of the shell.

According to the nozzle device for printing a stent with a multi-helix structure, the cartridge and the cartridge cover are connected in a threaded manner.

The nozzle device for printing the support of the multi-spiral structure according to the embodiment of the first aspect of the utility model comprises a pressurizing part, and the pressurizing part is used for applying pressure to each cavity so as to extrude the slurry out of the output channel.

According to a second aspect embodiment of the utility model, a 3D printer is provided, which comprises the above-mentioned nozzle device for printing a support with a multi-spiral structure.

Drawings

The utility model will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural view of a stent according to an embodiment of the present invention;

FIG. 2 is a schematic view of a partial line structure of a stent according to an embodiment of the present invention;

FIG. 3 is a schematic view showing the internal structure of a head unit according to an embodiment of the present invention;

FIG. 4 is a schematic view of a partial plan view of a cartridge according to an embodiment of the present invention, wherein two cavities are formed in the interior of the cartridge;

FIG. 5 is a schematic structural view of a rotating member according to an embodiment of the present invention;

FIG. 6 is a schematic view of a partial plan view of a cartridge according to another embodiment of the present invention, wherein three cavities are formed in the interior of the cartridge;

reference numerals: the device comprises a barrel 10, a partition plate 11, a first cavity 12, a second cavity 13, a third cavity 14, a barrel cover 20, a first output channel 31, a second output channel 32, a third output channel 33, a driving assembly 50, a rotating member 51, a fan piece 511, a rotating shaft 52, a transmission assembly 60, a first transmission wheel 61, a second transmission wheel 62, a shell 70, a needle 71, a bearing 80, a first slurry 100 and a second slurry 200.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, 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, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, 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 otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 5, an embodiment of the present invention provides a nozzle device for printing a rack with a multi-spiral structure, including a housing 70, a storage component and a driving mechanism, where the storage component and the driving mechanism are both installed in the housing 70, the storage component includes a detachably connected cartridge 10 and a cartridge cover 20, at least one partition 11 is installed in the cartridge 10, the partition 11 partitions the interior of the cartridge 10 to form at least two cavities, in this embodiment, the partition 11 has one, a first cavity 12 and a second cavity 13 are formed in the interior of the cartridge 10, the first cavity 12 is used for storing a first slurry 100, the second cavity 13 is used for storing a second slurry 200, the first cavity 12 is connected with a first output channel 31, and the second cavity 13 is connected with a second output channel 32, specifically, the first output channel 31 and the second output channel 32 are pipes; the driving mechanism is used for driving the barrel 10 to rotate so as to drive the first output channel 31 and the second output channel 32 to rotationally discharge, and the first output channel 31 and the second output channel 32 are circumferentially distributed around the rotation axis of the barrel 10, so that the first slurry 100 and the second slurry 200 are mutually wound to form a double-spiral structure.

The spray head device for printing the support with the multi-spiral structure is installed on a printing head of a 3D printer, a partition plate 11 is arranged in a material cylinder 10 of a material storage component, so that a first cavity 12 and a second cavity 13 are formed inside the material cylinder 10, the material cylinder 10 is sealed through a material cylinder cover 20, the first cavity 12 and the second cavity 13 are respectively connected with corresponding output channels, a driving mechanism drives the material cylinder 10 to rotate, so as to drive a first output channel 31 and a second output channel 32 to rotate and discharge, the first output channel 31 and the second output channel 32 are circumferentially distributed around a rotation axis of the material cylinder 10, so that a first slurry 100 and a second slurry 200 are mutually wound to form a double-spiral structure, and a support with a double-spiral structure is finally formed through layer-by-layer overlapping printing (refer to figures 1 and 2), and the support with the double-spiral structure has better mechanical properties compared with the existing support structure, the magazine and drive mechanism are mounted in a housing 70 to form an integral module, the housing 70 providing protection.

It can be understood that the number of the partition plates 11 can be set according to the requirement, referring to fig. 4, there are 1 partition plates 11, and 2 cavities are formed inside the partition material cylinder 10, namely a first cavity 12 and a second cavity 13; in other embodiments, referring to fig. 6, there are 3 partition plates 11, which partition the interior of the barrel 10 to form 3 cavities, namely, a first cavity 12, a second cavity 13 and a third cavity 14, and correspondingly connected output channels are a first output channel 31, a second output channel 32 and a third output channel 33, respectively, and the first output channel 31, the second output channel 32 and the third output channel 33 are circumferentially distributed around the rotation axis of the barrel 10, so that the rotation of the barrel 10 winds the slurries output from the three output channels to form a triple helix structure; when the number of the partition plates 11 is n (n is more than or equal to 3), n cavities are formed in the partition material barrel 10, the included angle between every two adjacent partition plates 11 is 360 degrees/n, and the material barrel 10 rotates to enable slurry output by each output channel to be mutually wound to form an n-spiral structure. Therefore, the number of lines constituting the spiral structure can be set according to the number of the spacers 11 to be provided.

The support with the multi-spiral line structure has the following advantages: (1) the multiple sizing agents of the bracket for printing the multi-spiral line structure are mutually independent and are separated by the partition plate 11, the performance of the sizing agents can be independently regulated and controlled, and the problem of performance neutralization does not exist; (2) the multi-strand lines of the multi-spiral line structure are spirally wound, the mechanical property of the multi-strand line structure has better advantages compared with that of a straight cylinder, a core shell and the like, and an internal interlocking mechanism (a node and an internal friction mechanism) exists in the process of receiving an external load, so that the multi-strand line structure not only can bear a larger external load, but also has good compressibility of a support; (3) the scaffold with the multi-spiral line structure has the advantage of unique thickness in tissue engineering, a single line carries cells to be printed, the single line provides a calcium source to ensure the mechanical property, and the composite scaffold meets the requirements of a bone repair scaffold (the mechanical property and the osteogenesis activity are both achieved); (4) the scaffold with the multi-spiral line structure can provide a platform for the antibiosis, drug delivery, degradation promotion and the separate expression of osteogenic factors of the bone defect part.

It is understood that the specific components of the first slurry 100 and the second slurry 200 may be set as desired, and generally include: inorganic metals such as calcium-phosphorus-based and calcium-silicon-based, polymers such as collagen, gelatin, GelMA and polycaprolactone, various bone-related cells, and related stimulating factors (metal ions such as copper and strontium, and osteogenic factors such as BMP and VEGF).

It will be appreciated that the first and second outlet channels 31, 32 are arranged side by side and at a smaller pitch, and that adjusting the distance of the first and second outlet channels 31, 32 from the axis of rotation of the cartridge 10 enables adjustment of the line characteristics of the subsequent double helix structure.

In this embodiment, the spray head device comprises a pressurizing means (not shown) for applying pressure to the first cavity 12 and the second cavity 13 to extrude the first slurry 100 out of the first output channel 31 and the second slurry 200 out of the second output channel 32.

It is understood that the pressurizing part can adopt an air pump to extrude the slurry through air pressure, or adopt a piston type structure to extrude the slurry through piston pressurization, as long as the extrusion of the slurry can be realized.

In some embodiments, the cartridge 10 and the cartridge cover 20 are screwed to facilitate removal of the cartridge cover 20 and replenishment.

In this embodiment, the driving mechanism includes a driving assembly 50 and a transmission assembly 60, the transmission assembly 60 includes a first driving wheel 61 and a second driving wheel 62, the first driving wheel 61 is in transmission fit with the second driving wheel 62, the second driving wheel 62 is fixedly connected to the cartridge cover 20, the driving assembly 50 drives the first driving wheel 61 to rotate so as to drive the second driving wheel 62 to rotate, and further drives the cartridge 10 and the cartridge cover 20 to rotate, and the cartridge 10 is indirectly driven to rotate through the transmission of the two driving wheels of the transmission assembly 60.

Specifically, in some embodiments, the first driving wheel 61 and the second driving wheel 62 are bevel gears, and the transmission direction can be changed by adopting bevel gear transmission, which is beneficial to the arrangement of the driving wheels in space, and reduces the occupied space of the transmission assembly 60 in the horizontal direction, so that the structure is more compact. Of course, it is understood that the first transmission wheel 61 and the second transmission wheel 62 can be spur gears or pulleys, etc. according to actual requirements.

It is understood that the second transmission wheel 62 is fixedly connected to the cartridge cover 20, and the second transmission wheel 62 and the cartridge cover 20 may be integrally formed or separately formed and then connected.

It will be appreciated that alternatively the second drive wheel 62 may be fixedly connected to the cartridge 10, again enabling the transmission of the rotational action.

Referring to fig. 3 and 5, in some embodiments, the driving assembly 50 includes a rotating member 51 and an air blowing member (not shown), specifically, the rotating member 51 has a windmill structure, the rotating member 51 includes a plurality of fan blades 511 radially arranged, the air blowing member is used for blowing air to drive the rotating member 51 to rotate, and a rotating shaft 52 is connected between the rotating member 51 and the first driving wheel 61. Specifically, the air blowing component may be connected to an air pipe by an air pump, and the air pipe blows out an air flow, which contacts with the fan 511 to drive the rotating member 51 to rotate, and the rotating member 51 drives the rotating shaft 52 to rotate, thereby driving the first driving wheel 61 to rotate.

Of course, it will be appreciated that the drive assembly 50 may alternatively employ a motor by which the first drive wheel 61 is directly or indirectly driven in rotation. Above-mentioned adopt the pneumatic mode to drive, compare in motor drive mode, can reduce the occupation space of electric parts for the structure is compacter.

In some embodiments, the bottom of the housing 70 is provided with a needle 71, the needle 71 has a through hole, the bottom of the needle 71 has a taper shape, and the first output channel 31 and the second output channel 32 are limited in the needle 71. The relative positions of the first output channel 31 and the second output channel 32 are limited by the needle 71, so that the first output channel 31 and the second output channel 32 are prevented from shaking to cause the change of the distance between the first output channel 31 and the second output channel 32 when the cartridge 10 rotates.

In some embodiments, at least one bearing 80 is connected between the cartridge 10 and the inner wall of the housing 70 to ensure that the cartridge 10 rotates more smoothly within the housing 70. In particular, a rolling bearing may be used, the outer ring of which cooperates with the inner wall of the housing 70 and the inner ring cooperates with the outer wall of the cartridge 10.

The embodiment of the utility model also provides a 3D printer which comprises the spray head device for printing the support with the multi-spiral structure. The printer comprising the spray head device controls the spray head device to move in three dimensions of the X direction, the Y direction and the Z direction and spray slurry, and printing and forming of the support with the multi-spiral line structure are achieved.

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 within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A nozzle assembly for printing a multi-spiral structured holder, comprising:

a housing;

the storage component is arranged in the shell and comprises a charging barrel and a charging barrel cover which are detachably connected, the charging barrel cover is used for sealing the charging barrel, at least one partition plate is arranged in the charging barrel, the partition plate partitions the interior of the charging barrel to form at least two cavities, the cavities are used for storing slurry, and each cavity is connected with an output channel; and

the driving mechanism is arranged in the shell and used for driving the charging barrel to rotate so as to drive the output channels to rotationally discharge, and the output channels are circumferentially distributed around the rotating axis of the charging barrel so as to enable the slurry output by the output channels to be mutually wound to form a multi-spiral structure.

2. The head apparatus for printing a support of a multi-spiral structure according to claim 1, wherein: the driving mechanism comprises a driving assembly and a transmission assembly, the transmission assembly comprises a first transmission wheel and a second transmission wheel, the first transmission wheel is in transmission fit with the second transmission wheel, the second transmission wheel is fixedly connected with the material barrel cover or the material barrel, and the driving assembly is used for driving the first transmission wheel to rotate so as to drive the second transmission wheel to rotate, and further drives the material barrel and the material barrel cover to rotate.

3. The nozzle device for printing a support of a multi-spiral structure according to claim 2, wherein: the driving assembly comprises a rotating piece and an air blowing part, the air blowing part is used for blowing air to drive the rotating piece to rotate, and a rotating shaft is connected between the rotating piece and the first driving wheel.

4. The head apparatus for printing a multi-spiral structured rack as claimed in claim 3, wherein: the rotating piece is of a windmill-shaped structure and comprises a plurality of fan blades which are radially arranged.

5. The nozzle device for printing a support of a multi-spiral structure according to claim 2, wherein: the first driving wheel and the second driving wheel are bevel gears.

6. The head apparatus for printing a support of a multi-spiral structure according to claim 1, wherein: the bottom of the shell is provided with a needle head, the needle head is provided with a through hole, the bottom of the needle head is in a taper shape, and each output channel is limited in the needle head.

7. The head apparatus for printing a support of a multi-spiral structure according to claim 1, wherein: at least one bearing is connected between the cartridge and the inner wall of the housing.

8. The head apparatus for printing a support of a multi-spiral structure according to claim 1, wherein: the charging barrel is in threaded connection with the charging barrel cover.

9. The head apparatus for printing a support of a multi-spiral structure according to any one of claims 1 to 8, wherein: the sprayer device comprises a pressurizing component, and the pressurizing component is used for applying pressure to each cavity so as to extrude the slurry out of the output channel.

10. The utility model provides a 3D printer which characterized in that: a spray head device comprising a support for printing a multi-spiral structure according to any of claims 1 to 9.

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