CN109732923B - Pre-photo-curing type extrusion 3D printing spray head for various photosensitive materials - Google Patents
Pre-photo-curing type extrusion 3D printing spray head for various photosensitive materials Download PDFInfo
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- CN109732923B CN109732923B CN201910001109.XA CN201910001109A CN109732923B CN 109732923 B CN109732923 B CN 109732923B CN 201910001109 A CN201910001109 A CN 201910001109A CN 109732923 B CN109732923 B CN 109732923B
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- 239000000463 material Substances 0.000 title claims abstract description 69
- 238000001125 extrusion Methods 0.000 title claims abstract description 55
- 238000010146 3D printing Methods 0.000 title claims abstract description 15
- 239000007921 spray Substances 0.000 title claims abstract description 8
- 238000000016 photochemical curing Methods 0.000 title description 9
- 239000013307 optical fiber Substances 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000007639 printing Methods 0.000 claims abstract description 20
- 238000003860 storage Methods 0.000 claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000001723 curing Methods 0.000 abstract description 41
- 238000000465 moulding Methods 0.000 abstract description 4
- 230000001413 cellular effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
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- 239000010410 layer Substances 0.000 description 3
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- KIUKXJAPPMFGSW-DNGZLQJQSA-N (2S,3S,4S,5R,6R)-6-[(2S,3R,4R,5S,6R)-3-Acetamido-2-[(2S,3S,4R,5R,6R)-6-[(2R,3R,4R,5S,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-2-carboxy-4,5-dihydroxyoxan-3-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid Chemical compound CC(=O)N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O[C@H]2[C@@H]([C@@H](O[C@H]3[C@@H]([C@@H](O)[C@H](O)[C@H](O3)C(O)=O)O)[C@H](O)[C@@H](CO)O2)NC(C)=O)[C@@H](C(O)=O)O1 KIUKXJAPPMFGSW-DNGZLQJQSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 229920002674 hyaluronan Polymers 0.000 description 1
- 229960003160 hyaluronic acid Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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Abstract
The invention discloses a pre-light curing type extrusion 3D printing spray head for various photosensitive materials, which comprises a main shell, and an extrusion head module and an ultraviolet module which are arranged in the main shell, wherein the extrusion module comprises a variable-diameter light-proof storage chamber, a needle cylinder, a needle head and an extrusion system, and the variable-diameter light-proof storage chamber comprises a chuck and a fixed ring sleeve; the ultraviolet light module comprises an ultraviolet light fiber and an optical fiber bracket. The invention provides a multi-beam focusing curing light source design, which can regulate and control curing conditions according to different material requirements, has adjustable light intensity and wavelength, and controllable relative positions of an optical fiber support and a loop sleeve, realizes accurate positioning of the curing position, can effectively avoid the plug phenomenon caused by curing inside a needle head, ensures uniform curing degree of liquid filaments, and can accurately control the molding size of the filaments. The invention realizes the consistent and controllable integral curing time of the printing structure by adopting an external pre-curing method, and remarkably improves the forming precision, the structural stability and the uniformity of the cellular material.
Description
Technical Field
The invention relates to a pre-light curing type extrusion 3D printing spray head applicable to various materials and used for manufacturing a three-dimensional model and biological tissues, which supports various photosensitive material manufacturing and printing of cells and biological materials, and belongs to the fields of additive manufacturing and biological 3D printing.
Background
Conventional additive manufacturing methods for photocurable materials include DLP printing and SLA printing, in which a liquid photosensitive material is loaded into a reservoir, and an Ultraviolet (UV) light spot or surface is projected into the liquid photosensitive material to cure it and form a monolayer structure of a desired three-dimensional object. The multi-layer build up is achieved by lifting the print substrate until the 3D structure is printed. The 3D structure after printing must be cleaned with a special solvent to remove uncured material from the surface. The size of the printed three-dimensional object is limited by the size of the storage tank, and the amount of preloaded liquid photosensitive material in the storage tank is large, so that the liquid photosensitive material is wasted, and the manufacturing cost is greatly increased. The illumination time of the materials of different layers is different, so that the problems of uneven stress distribution in the structure, structural deflection deformation and the like are easily caused, and further, in the printing of cell-containing materials, the illumination time of cells at different positions is different, and the cell survival rate and distribution in the structure are influenced.
Disclosure of Invention
The invention aims to solve the problems, and provides a pre-light curing type extrusion 3D printing nozzle for various photosensitive materials. The light-cured additive manufacturing device has the advantages that the light-cured additive manufacturing device can realize the extrusion of various materials, is reasonable in structural design and convenient to assemble, can meet different material requirements, is adjustable in light intensity and wavelength, is externally pre-cured, can accurately position and control a curing point, effectively avoids the plug phenomenon caused by curing inside a needle, is consistent when the whole structure is cured, remarkably improves the printing speed, the forming precision and the cell activity, effectively reduces the material waste, and greatly reduces the manufacturing cost.
In order to meet the requirements, the technical scheme adopted by the invention for solving the technical problems is as follows:
the pre-light curing type extrusion 3D printing spray head structure for various photosensitive materials comprises a main shell, and an extrusion head module and an ultraviolet light module which are arranged in the main shell, wherein the extrusion module comprises a variable-diameter light-resistant storage chamber, a needle cylinder, a needle head and an extrusion system, and the variable-diameter light-resistant storage chamber comprises a fixed ring sleeve and a plurality of chucks; the ultraviolet light module comprises an ultraviolet light fiber and an optical fiber bracket; wherein,
the fixed ring sleeve is fixed in the main shell, the needle head is communicated with the needle cylinder loaded with the liquid photosensitive material, the needle cylinder is clamped in the fixed ring sleeve through a plurality of chucks, the needle cylinder is used for loading the liquid photosensitive material, and the needle cylinder is connected with the extrusion system to realize extrusion of the material; the optical fiber support is nested at the periphery of the fixed ring sleeve, the ultraviolet light fiber is embedded in the optical fiber support, and the ultraviolet light fiber is externally connected with the ultraviolet light generator; when the optical fiber bracket is in operation, ultraviolet light is emitted through the ultraviolet light generator, emitted from the bottom of the optical fiber bracket through the ultraviolet light fiber in the optical fiber bracket, focused below the bottom of the optical fiber bracket to form an ultraviolet focus, and the liquid photosensitive material is extruded through the needle head and solidified into solid filaments through the ultraviolet focus.
Preferably, the extrusion system adopts a pneumatic or screw extrusion mode.
Preferably, the chuck of the variable-diameter light-resistant material storage chamber is made of stainless steel, the fixed ring sleeve of the variable-diameter light-resistant material storage chamber is made of aluminum alloy, and the outer surface of the fixed ring sleeve is marked with fixed scales; support the multi-specification needle cylinder, the specification range of needle cylinder: 1 ml-50 ml.
Preferably, the plurality of chucks are uniformly distributed on the circumference of the fixed ring sleeve, and the plurality of chucks jointly clamp the needle cylinder; the length of the adjusting chuck entering the fixed ring sleeve is provided, and the needle cylinders with different specifications can be clamped.
Preferably, the optical fiber bracket adopts a deep ultraviolet quartz optical fiber, and the passing wave band is 200-800 nm; the optical fiber bracket is made of aluminum alloy; the 16 optical fiber channels are uniformly distributed in the optical fiber support in an annular mode, ultraviolet rays are emitted from the bottom of the optical fiber support at the same oblique angle and focused below the bottom of the optical fiber support, and the ultraviolet focus can be accurately positioned and controlled by adjusting the position and scales of the optical fiber support relative to the fixed loop of the storage chamber; the optical fibers have the same light intensity, the light intensity and the wavelength can be regulated and controlled by an external ultraviolet light generator, the single light intensity is smaller than the material curing requirement, and the polymerization light intensity is larger than the material curing requirement.
Preferably, the needle adopts a stainless steel needle, the solid filament size is ensured by the inner diameter size of the needle, and the size range is as follows: 0.31 mm-2.77 mm.
Preferably, the pre-light curing extrusion 3D printing nozzle facing to various photosensitive materials further comprises a printing substrate, and the solid filaments are regulated and controlled by an external three-dimensional motion system and fall on the printing substrate according to design requirements.
The variable-diameter light-resistant storage chamber can be adjusted according to the outer diameter of a standard syringe, can adapt to the standard syringe with the specification of 3cc,5cc,10cc and 30cc, and adapts to the outer diameter size range of the syringe: 11-26cm
The beneficial effects of the invention are as follows:
the invention provides a pre-photo-curing type extrusion 3D printing spray head for various photosensitive materials, which comprises a main shell, a chuck, a fixed ring sleeve, a needle head, an ultraviolet light fiber and an optical fiber bracket. The invention realizes the extrusion light curing integrated spray head by adopting a reasonable structural design scheme, has light and compact structure and convenient assembly and clamping, is suitable for various photosensitive materials and multiple-specification needle cylinders, and improves expandability.
The invention provides a multi-beam focusing curing light source design, which can regulate and control curing conditions according to different material requirements, has adjustable light intensity and wavelength, can control the relative positions of an optical fiber support and a loop sleeve, realizes accurate positioning of the curing position, effectively avoids the plug phenomenon caused by curing in a needle head compared with the prior molding technology, ensures uniform curing degree of liquid filaments, and can accurately control the molding size of the filaments.
According to the invention, by adopting an external pre-curing method and adjusting and controlling pneumatic extrusion/screw extrusion parameters, the integral curing time of the printed structure is consistent and controllable, the forming precision, the structural stability and the uniformity of cellular materials are obviously improved, the problem of inconsistent illumination time of different layers of materials in the existing photo-curing printing is reduced, and the problem of uneven curing light intensity at different positions of the printed structure is improved.
According to the invention, the main shell is packaged into an integral structure, the material tightness is good, the ultraviolet light module is isolated from the external environment, the extrusion curing process is prevented from being interfered by the external environment, and the ultraviolet light pollution is avoided.
The invention realizes the printing of the photo-curing material by adopting the extrusion method, thereby effectively reducing the material waste and greatly reducing the manufacturing cost.
In summary, the pre-photo-curing type extrusion 3D printing nozzle for various photosensitive materials provided by the invention realizes the extrusion molding technology of various liquid photosensitive materials, remarkably improves the defects of the prior art, and provides an effective solution for the problems.
Drawings
Fig. 1 is an exploded view of a pre-photo-cured extrusion 3D printing head for a variety of photosensitive materials.
Fig. 2 is a cross-sectional view of a pre-photo-cured extrusion 3D printing head facing a variety of photosensitive materials.
In the figure: 1 is a needle cylinder, 2 is a needle head, 3 is a main shell, 4 is a fixed ring sleeve, 5 is a chuck, 6 is an ultraviolet light fiber, 7 is an optical fiber bracket, 8 is an ultraviolet light beam, 9 is a liquid filament, 10 is a solid filament, 11 is a printing substrate, 12 is an extrusion system, and 13 is a photosensitive material.
Detailed Description
The specific structure and operation of the present invention will be further illustrated with reference to specific examples, which are to be understood as illustrative of the invention and are not to be construed as limiting the scope of the invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
As shown in fig. 1, the pre-photo-curing extrusion 3D printing nozzle for multiple photosensitive materials provided by the invention is characterized in that the multiple photosensitive materials are not limited by the invention, and the integral curing time of the printing structure can be controlled by adjusting and controlling the pneumatic extrusion/screw extrusion parameters and the ultraviolet wavelength and light intensity control materials according to the material requirements. And moreover, the relative positions of the optical fiber support and the loop are controllable, so that the accurate positioning and curing position is realized, and compared with the prior molding technology, the plug phenomenon caused by curing inside the needle is effectively avoided. And secondly, pre-light curing refers to curing before materials are stacked into a three-dimensional structure, and liquid filaments are formed into solid filaments through multi-beam focus curing forming capable of being positioned accurately, the filament size can be ensured through needles of different specifications, the integral curing time consistency of a printing structure is realized, the uniform curing degree of the liquid filaments is ensured, and the forming precision, the structural stability and the uniformity of cell-carrying materials are obviously improved. Meanwhile, the main shell encapsulates the whole structure, the material tightness is good, the ultraviolet light module is isolated from the external environment, the extrusion curing process is prevented from being interfered by the external environment, and meanwhile ultraviolet light pollution is avoided. Finally, the extrusion method realizes the printing of the photo-curing material, effectively reduces the material waste and greatly reduces the manufacturing cost.
Specifically, the present invention is divided into the following parts: the extrusion device comprises a main shell 3, and an extrusion head module and an ultraviolet light module which are arranged in the main shell 3, wherein the extrusion module comprises a variable-diameter light-resistant storage chamber, a needle cylinder 1, a needle head 2, a pneumatic extrusion/screw extrusion system 12, and the variable-diameter light-resistant storage chamber comprises a chuck 5 and a fixed ring sleeve 4. The ultraviolet light module comprises an ultraviolet light fiber 6 and an optical fiber bracket 7.
As shown in fig. 2, ultraviolet light is emitted by an ultraviolet light generator, passes through an ultraviolet light fiber 6 inside an optical fiber support 7, is emitted from the bottom of the optical fiber support 7, is focused below the bottom of the optical fiber support 7, and can obtain ultraviolet light beams 8 with different light intensities and wavelengths by adjusting parameters of the ultraviolet light generator.
The ring sleeve 4 is fixed on the main shell 3, the needle head 2 is communicated with the needle cylinder 1 loaded with the liquid photosensitive material 13, the needle cylinder is clamped in the variable-diameter light-resistant storage chamber through the chuck 5, the three-point variable-diameter clamping mode supports the needle cylinder with multiple specifications, the structure is simple and compact, the needle cylinder is easy to clamp, and the needle cylinder can rotate by 360 degrees.
Extrusion printing may be accomplished in a variety of extrusion modes, such as pneumatic extrusion/screw extrusion, with the pneumatic extrusion/screw extrusion system 12 determining the speed and cure time of the extruded filaments.
The syringe 1 loaded with the liquid photosensitive material 13 is fixed in the diameter-variable light-shielding material storage chamber, the liquid photosensitive material 13 is extruded by the needle head 2 to form liquid filaments 9, and the liquid filaments are solidified into solid filaments 10 through the focus of the multi-ultraviolet light beam 8 and fall on the printing substrate 11.
The multi-ultraviolet light beam focusing curing can be used for adjusting and controlling curing conditions according to different material requirements, the light intensity and the wavelength are adjustable, the relative positions of the optical fiber support 7 and the loop sleeve 4 are controllable, the single light intensity is smaller than the material curing requirement, the polymerization light intensity is larger than the material curing requirement, the liquid filament 9 can be cured at the focus position of the multi-ultraviolet light beam 8 only, the accurate positioning of the curing focus position is realized, and the liquid filament 9 can form a solid filament 10 through the ultraviolet light focus on the set curing position.
The main shell 3 encapsulates the overall structure, and the material leakproofness is good, and ultraviolet module keeps apart with external environment, guarantees to extrude the solidification process and does not receive external interference, avoids ultraviolet pollution simultaneously, and encapsulation design supports the mountability of shower nozzle at arbitrary 3D printing motion platform.
Implementation case:
1M methacrylic acid hyaluronic acid photo-curing material is selected, a needle cylinder is 50ml, a needle head is 25G, pneumatic extrusion is carried out, extrusion pressure is 0.55bar, a wavelength 300nm ultraviolet light generator is adopted, light intensity is 16 mu w/cm < 2 >, and focal light intensity is 256 mu w/cm 2 . Solid filaments with a diameter of 0.28mm can be stably and continuously printed.
Claims (1)
1. The pre-light curing type extrusion 3D printing spray head structure for various photosensitive materials is characterized by comprising a main shell (3), and an extrusion head module and an ultraviolet light module which are arranged in the main shell (3), wherein the extrusion module comprises a variable-diameter light-resistant storage chamber, a needle cylinder (1), a needle head (2) and an extrusion system (12), and the variable-diameter light-resistant storage chamber comprises a fixed ring sleeve (4) and a plurality of chucks (5); the ultraviolet light module comprises an ultraviolet light fiber (6) and an optical fiber bracket (7); wherein,
the fixed ring sleeve (4) is fixed in the main shell (3), the needle head (2) is communicated with the needle cylinder (1) loaded with the liquid photosensitive material, the needle cylinder (1) is clamped in the fixed ring sleeve (4) through a plurality of chucks (5), the needle cylinder (1) is used for loading the liquid photosensitive material (13), and the needle cylinder (1) is connected with the extrusion system (12) to realize extrusion of the material; the optical fiber support (7) is nested at the periphery of the fixed ring sleeve (4), the ultraviolet light fiber (6) is embedded in the optical fiber support (7), and the ultraviolet light fiber (6) is externally connected with an ultraviolet light generator; when the optical fiber ultraviolet light-focusing device works, ultraviolet light is emitted through an ultraviolet light generator, emitted from the bottom of the optical fiber bracket (7) through an ultraviolet light fiber (6) in the optical fiber bracket (7), focused below the bottom of the optical fiber bracket (7) to form an ultraviolet focus, and a liquid photosensitive material (13) is extruded through a needle (2) and solidified into a solid filament (10) through the ultraviolet focus;
the extrusion system (12) adopts a pneumatic or screw extrusion mode;
the chuck (5) of the variable-diameter light-resistant material storage chamber is made of stainless steel, the fixed ring sleeve (4) of the variable-diameter light-resistant material storage chamber is made of aluminum alloy, and the outer surface of the fixed ring sleeve is marked with fixed scales; support many specifications cylinder (1), cylinder (1) specification scope: 1 ml-50 ml;
the chucks (5) are uniformly distributed in the circumferential direction of the fixed ring sleeve (4), and the chucks (5) jointly clamp the needle cylinder (1); the length of the adjusting chuck (5) entering the fixed ring sleeve (4) is provided, and the needle cylinder (1) with different specifications can be clamped;
the optical fiber bracket (7) adopts a deep ultraviolet quartz optical fiber, and the passing wave band is 200-800 nm; the optical fiber bracket (7) is made of aluminum alloy; the 16 fiber channels are uniformly distributed in the fiber support (7) in an annular mode, ultraviolet rays are emitted from the bottom of the fiber support (7) at the same oblique angle and focused below the bottom of the fiber support (7), and the ultraviolet focus can be accurately positioned and controlled by adjusting the position and scales of the fiber support (7) relative to the fixed ring sleeve (4) of the storage chamber; the optical fibers have the same light intensity, the light intensity and the wavelength can be regulated and controlled by an external ultraviolet light generator, the single light intensity is smaller than the material curing requirement, and the polymerization light intensity is larger than the material curing requirement;
the needle head (2) adopts a stainless steel needle head (2), the size of the solid filament (10) is ensured by the inner diameter size of the needle head (2), and the size range is as follows: 0.31 mm-2.77 mm;
the printing device also comprises a printing substrate (11), wherein the solid filaments (10) are regulated and controlled by an external three-dimensional motion system and fall on the printing substrate (11) according to design requirements.
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| CN201910001109.XA CN109732923B (en) | 2019-01-02 | 2019-01-02 | Pre-photo-curing type extrusion 3D printing spray head for various photosensitive materials |
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| WO2021158659A1 (en) * | 2020-02-03 | 2021-08-12 | Advanced Solutions Life Sciences, Llc | Modular light source for curing of 3d printed biological and engineered materials |
| CN111169008B (en) * | 2020-03-03 | 2022-02-18 | 天津博盛睿创科技有限公司 | 3D printing nozzle |
| CN111482602B (en) * | 2020-04-09 | 2020-12-22 | 北京科技大学 | 3D printing device and method based on photocuring agent injection and capable of preventing blockage of spray head |
| CN111923402A (en) * | 2020-09-16 | 2020-11-13 | 佛山科学技术学院 | Rigid-flexible coupling part mixed additive manufacturing method based on liquid gel environment |
| CN113878873A (en) * | 2021-10-11 | 2022-01-04 | 中北大学 | Photocuring anisotropic permanent magnet 3D printer and using method thereof |
| CN114147953B (en) * | 2021-11-30 | 2022-08-23 | 江南大学 | Additive manufacturing equipment and method based on material extrusion and photocuring composite molding |
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