CN109747147A - A kind of manufacturing method increasing material without support - Google Patents
A kind of manufacturing method increasing material without support Download PDFInfo
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- CN109747147A CN109747147A CN201910146518.9A CN201910146518A CN109747147A CN 109747147 A CN109747147 A CN 109747147A CN 201910146518 A CN201910146518 A CN 201910146518A CN 109747147 A CN109747147 A CN 109747147A
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Abstract
The invention discloses a kind of manufacturing methods for increasing material without support, the following steps are included: (1) is using the 3D printer for having interior spray head and outer spray head, interior spray head and the coaxial arrangement of outer spray head, the discharge end of interior spray head protrudes into the spray chamber of outer spray head, and interior spray head is concordant with the discharge end of outer spray head；(2) it is printed in graininess gel using 3D printer, Gel Precursor, gel cross-linkage agent pass through outer spray head, the outflow of interior spray head respectively, and printing obtains the hollow gelatinous fibre not reacted completely；(3) it by control print parameters, accumulates the hollow gelatinous fibre not reacted completely successively, forms three-dimensional structure；(4) after the completion of printing, excess particles shape gel is removed, three-dimensional structure is soaked in the gel cross-linkage agent, it is fully cured.Using graininess gel as support the manufacture of complex three-dimensional structure can be realized, and can guarantee that inside has network of runner while realizing complex three-dimensional structure without printing support in the present invention.
Description
Technical field
The invention belongs to stereo shaping material increasing fields, and in particular to a kind of manufacturing method for increasing material without support.
Background technique
Three-dimensional printing technology printing three-dimensional entity model manufacturing technology merged CAD, material processing at
Shape technology.Based on digital model file, by software and digital control system by dedicated metal material, nonmetallic materials and
Biomaterial for medical purpose is successively accumulated according to modes such as extruding, sintering, melting, photocuring, injections, produces the system of physical item
Make technology.Three-dimensional printing technology is printed according to the principle of " successively printing, be layering " with distinctive appearance or complex internal
The object of structure.Its forming process is not limited by any geometry, and print speed can be controlled arbitrarily, and different materials can
Can be solution, suspension or lotion by the substance of different nozzle printings, printing, therefore, 3 D-printing can hold very much
Easy control material composition, microstructure and surface characteristic.
Since increasing material manufacturing process is carried out based on accumulation principle, needed in some space structure banking processes
The phenomenon that component support, otherwise its space structure will appear deformation in the type-approval process in later period, and there is also one for support itself
Fixed limitation.On the one hand, support construction needs certain condition, needs to solve to supporting mechanism such as during modeling
The problem of what is constructed, therefore will increase the difficulty of building process, and therefore the building of some space structures can also be limited to.
On the other hand, during support support construction quantity should not excessively with it is excessively complicated, otherwise the later period remove bracket when influence whether
The quality of final finished, a large amount of support construction also will increase cost and the period of increasing material manufacturing.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of manufacturing method for increasing material without support, the party
Method manufacturing process is without printing support, the advantage for having manufacture efficiency high, easily operated, at low cost.
To achieve the goals above, the invention adopts the following technical scheme:
The present invention provides a kind of manufacturing method for increasing material without support, comprising the following steps:
(1) using the 3D printer for having interior spray head and outer spray head, interior spray head and the coaxial arrangement of outer spray head, interior spray head goes out
Material end is protruded into the spray chamber of outer spray head, and interior spray head is concordant with the discharge end of outer spray head；
Raw material is prepared as material is increased using Gel Precursor, gel cross-linkage agent, graininess gel is as backing material；
(2) it is printed in graininess gel using 3D printer, Gel Precursor, gel cross-linkage agent pass through outer respectively
Spray head, the outflow of interior spray head, printing obtain the hollow gelatinous fibre not reacted completely；
(3) by control print parameters, accumulate the hollow gelatinous fibre not reacted completely successively, in the mistake successively printed
Adjacent hollow gelatinous fibre is fused together in journey, and graininess gel plays support and restriction effect, forms three-dimensional structure；
(4) after the completion of printing, excess particles shape gel is removed, three-dimensional structure is soaked in the gel cross-linkage agent later
In, it is fully cured and increases material without support to get described.
Preferably, the Gel Precursor is sodium alginate aqueous solution, mass percent concentration is 1~3%, flow velocity
For 0.6~1.0ml/min.
Preferably, the gel cross-linkage agent is calcium chloride water, mass percent concentration is 3~6%, and flow velocity is
0.1~0.4ml/min.
Preferably, the graininess gel is Carbopol hydrogel, mass percent concentration is 0.5~2%, pH
It is 6~8.
Preferably, in the step (3), in layer-by-layer print procedure, the speed of control platform movement is 2000~
6000mm/min, Coaxial nozzle promotes 0.2~0.4mm after every one layer of printing.
The principle of the present invention is as follows:
The hollow gelatinous fibre generating principle not reacted completely: the sodium alginate soln and interior spray head stream flowed out by outer spray head
Calcium chloride solution contact out, surface first crosslink reaction, form one layer of calcium alginate gel, this layer of calcium alginate gel makes
Sodium alginate and calcium chloride solution are separated can only allow calcium ion to pass through in two sides due to the hole very little of the gel layer of formation,
Seaweed acid ion is not allowed to pass through, so the reaction was continued for sodium alginate of the calcium ion of internal layer across gel layer and outside, until
Calcium ion reacts completely, and sodium alginate does not react completely, and ultimately forming outer solid part is calcium alginate gel and not complete
The sodium alginate of full response, the gelatinous fibre of inner hollow.
Adjacent hollow gelatinous fibre merges principle: hollow gelatinous fibre outer layer is that the sodium alginate not reacted completely is molten
Colloidal state, unreacted sodium alginate can combine together between adjacent layer, and due to graininess gel play support and
Restriction effect, molding three-dimensional structure keep good form；Around this principle, to make adjacent hollow gelatinous fibre line with
Line or layer are fused together with layer, need the distance between layers according to hollow gelatinous fibre radial dimension strict control, this
Require control system when generating code information, it is high to set suitable layer according to different technological parameters.
Compared with prior art, the present invention has the advantage that
(1) system of complex three-dimensional structure can be realized without printing support using graininess gel as support in the present invention
It makes, and can guarantee that inside has network of runner while realizing complex three-dimensional structure.
(2) present invention forms the simple process of three-dimensional structure, and manufacture efficiency is high, easily operated, at low cost, without subsequent multiple
Miscellaneous treatment process.
(3) present invention can be suitably used for a variety of 3D printing equipments, there is good application prospect.
Detailed description of the invention
Fig. 1 prints the schematic diagram of hollow gelatinous fibre process in Carbopol hydrogel for the present invention.
Fig. 2 is the state diagram of the three-dimensional structure that is printed using method of the invention in Carbopol hydrogel.
Fig. 3 is the state diagram of the three-dimensional structure that is printed using method of the invention after calcium chloride solution impregnates.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific examples.
The preparation of raw material:
The sodium alginate soln that mass concentration is 2%: biochemical grade sodium alginate powder is placed in radiation sterilization under ultraviolet lamp
Half an hour, weighing 20g sodium alginate powder and being added in 980g deionized water is swollen it sufficiently, and then magnetic stirrer stirs
10 hours, revolving speed 100rpm, it is to be mixed uniformly after obtain the sodium alginate soln that mass concentration is 2%.
The calcium chloride solution that mass concentration is 4%: it is small that biochemical grade calcium chloride powder is placed in radiation sterilization half under ultraviolet lamp
When, it weighs 40g calcium chloride powder and is added in 960g deionized water and mix, magnetic stirrer stirs 0.5 hour, and revolving speed is
120rpm, it is to be mixed uniformly after obtain mass concentration be 4% calcium chloride solution.
The Carbopol hydrogel that mass concentration is 1.5%, pH value is 7: Carbopol powder is placed under ultraviolet lamp and is shone
Sterilizing half an hour is penetrated, the Carbopol powder for weighing 15g, which is added in 985g deionized water, to be mixed, magnetic stirrer stirring 0.5
Hour, revolving speed 120rpm, it is to be mixed uniformly after, it is molten that the sodium hydroxide that a certain amount of mass fraction is 50% is added dropwise under stiring
Liquid, adjustment pH value are 7, form Carbopol hydrogel.
The present invention provides a kind of manufacturing method for increasing material without support, comprising the following steps:
Step 1: using the 3D printer for having interior spray head and outer spray head, interior spray head and the coaxial arrangement of outer spray head, interior spray head
Discharge end protrude into the spray chamber of outer spray head, and interior spray head is concordant with the discharge end of outer spray head, it is specific as shown in Figure 1；
Mass concentration is used to prepare raw material, quality as material is increased for 2% sodium alginate soln, 4% calcium chloride solution
The Carbopol hydrogel that concentration is 1.5%, pH value is 7 is as backing material；
Step 2: being added to sodium alginate soln in the syringe being connected with outer spray head, calcium chloride solution is added to
In the syringe being connected with interior spray head, and two syringes are individually positioned on syringe pump, syringe and Coaxial nozzle pass through
Elastic hose connection, is printed in Carbopol hydrogel using 3D printer, and the flowing velocity of outer nozzle liquid is arranged
For 0.8ml/min, the flowing velocity that interior nozzle liquid is arranged is 0.2ml/min, and need to print three are imported into 3D printer
Coaxial nozzle is installed on 3D printer by dimension module, and under the drive of 3D printer, Coaxial nozzle is in Carbopol hydrogel
Middle movement, while under the push effect of syringe pump, outer spray head flows out sodium alginate soln, and interior spray head flows out calcium chloride solution,
The sodium alginate soln of outer spray head outflow is contacted with the calcium chloride solution that interior spray head flows out, and surface first crosslinks reaction, in turn
The hollow gelatinous fibre not reacted completely is formed in Carbopol hydrogel；
Step 3: accumulating the hollow gelatinous fibre not reacted completely successively by control print parameters, being printed successively
During adjacent hollow gelatinous fibre be fused together, Carbopol hydrogel plays support and restriction effect, forms three
Structure is tieed up, as shown in Figure 2；
Step 4: removing extra Carbopol hydrogel after the completion of the printing of entire three-dimensional structure, three-dimensional structure being soaked
It steeps in 4% calcium chloride solution, it is fully cured, obtain the internal three-dimensional structure with network of runner, as shown in Figure 3.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, this hair is still fallen within
In the range of bright scheme.
Claims (6)
1. a kind of manufacturing method for increasing material without support, which comprises the following steps:
(1) 3D printer for having interior spray head and outer spray head, interior spray head and the coaxial arrangement of outer spray head, the discharge end of interior spray head are utilized
It protrudes into the spray chamber of outer spray head, and interior spray head is concordant with the discharge end of outer spray head；
Raw material is prepared as material is increased using Gel Precursor, gel cross-linkage agent, graininess gel is as backing material；
(2) it is printed in graininess gel using 3D printer, Gel Precursor, gel cross-linkage agent pass through outer spray respectively
Head, the outflow of interior spray head, printing obtain the hollow gelatinous fibre not reacted completely；
(3) by control print parameters, accumulate the hollow gelatinous fibre not reacted completely successively, during layer-by-layer printing
Adjacent hollow gelatinous fibre is fused together, and graininess gel plays support and restriction effect, forms three-dimensional structure；
(4) after the completion of printing, excess particles shape gel is removed, three-dimensional structure is soaked in the gel cross-linkage agent later, is made
It, which is fully cured, increases material without support to get described.
2. increasing the manufacturing method of material without support according to claim 1, which is characterized in that the Gel Precursor is alginic acid
Sodium water solution, mass percent concentration are 1~3%, and flow velocity is 0.6~1.0ml/min.
3. increasing the manufacturing method of material without support according to claim 1, which is characterized in that the gel cross-linkage agent is calcium chloride
Aqueous solution, mass percent concentration are 3~6%, and flow velocity is 0.1~0.4ml/min.
4. increasing the manufacturing method of material without support according to claim 1, which is characterized in that the graininess gel is
Carbopol hydrogel, mass percent concentration are that 0.5~2%, pH is 6~8.
5. increasing the manufacturing method of material without support according to claim 1, which is characterized in that in the step (3), successively print
In the process, control platform movement speed be 2000~6000mm/min, it is every printing one layer after Coaxial nozzle promoted 0.2~
0.4mm。
6. what the manufacturing method for increasing material without support described according to claim 1~any one of 5 was prepared increases material without support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910146518.9A CN109747147B (en) | 2019-02-27 | 2019-02-27 | Manufacturing method of unsupported additive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910146518.9A CN109747147B (en) | 2019-02-27 | 2019-02-27 | Manufacturing method of unsupported additive |
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| CN109747147A true CN109747147A (en) | 2019-05-14 |
| CN109747147B CN109747147B (en) | 2020-05-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564009A (en) * | 2019-08-20 | 2019-12-13 | 上普(北京)生物科技有限公司 | Composition for treating skin inflammation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105328905A (en) * | 2015-11-09 | 2016-02-17 | 西安交通大学 | 3D printing system and technology of coaxial sprayer and enhanced type hollow gel pipe of coaxial sprayer |
| CN108587903A (en) * | 2018-03-21 | 2018-09-28 | 暨南大学 | A method of using the quick 3D printing tumor tissues model of more nozzles of support bath |
-
2019
- 2019-02-27 CN CN201910146518.9A patent/CN109747147B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105328905A (en) * | 2015-11-09 | 2016-02-17 | 西安交通大学 | 3D printing system and technology of coaxial sprayer and enhanced type hollow gel pipe of coaxial sprayer |
| CN108587903A (en) * | 2018-03-21 | 2018-09-28 | 暨南大学 | A method of using the quick 3D printing tumor tissues model of more nozzles of support bath |
Non-Patent Citations (1)
| Title |
|---|
| QING GAO ET.AL: "Coaxial nozzle-assisted 3D bioprinting with built-in microchannels for nutrients delivery", 《BIOMATERIALS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564009A (en) * | 2019-08-20 | 2019-12-13 | 上普(北京)生物科技有限公司 | Composition for treating skin inflammation |
| CN110564009B (en) * | 2019-08-20 | 2021-09-17 | 上普(北京)生物科技有限公司 | Composition for treating skin inflammation |
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| CN109747147B (en) | 2020-05-19 |
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Inventor after: Liu Jun Inventor after: Liu Gang Inventor after: Huang Jingdong Inventor after: Wang Zhen Inventor before: Liu Jun Inventor before: Huang Jingdong Inventor before: Wang Zhen Inventor before: Liu Gang |