CN108943324A - A kind of 3D printing powder bonding method based on water-soluble effect - Google Patents
A kind of 3D printing powder bonding method based on water-soluble effect Download PDFInfo
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- CN108943324A CN108943324A CN201810729339.3A CN201810729339A CN108943324A CN 108943324 A CN108943324 A CN 108943324A CN 201810729339 A CN201810729339 A CN 201810729339A CN 108943324 A CN108943324 A CN 108943324A
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- powder
- particle
- cement
- aqueous solution
- water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/001—Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
The 3D printing powder bonding method based on water-soluble effect that the invention discloses a kind of the steps include: finished ground cement particle and be filled primarily with powder particle, is proportionally packed into powder cylinder after evenly mixing, obtains raw material powder；Aqueous solution is connected to piezo jets, moulding cylinder rises to highest stroke；Power spreading device is preset into moulding cylinder by the raw material powder in powder cylinder；Piezo jets spray aqueous solution according to part section graphical information, and aqueous solution makes finished ground cement grain dissolution, to cement fluid permeability to being filled primarily between the gap of powder particle, make to be filled primarily with powder particle after solidification and are adhesively fixed according to spraying area shape.The present invention can not only be blocked using aqueous solution spraying to avoid spray head caused by colloidal bond, but also more clean and environmental protection.The present invention changes the technique that conventional powder bonding uses colloidal bond, manufactures mold for 3D printing powder bonding technology and provides new method.
Description
Technical field
The present invention relates to the rapid shaping fields of 3D printing powder bonding technology more particularly to a kind of based on water-soluble effect
3D printing powder bonding method.
Background technique
3D printing technique, also referred to as rapid shaping technique, by nearly development in 30 years, technology is more and more mature, widely
For mold manufacture, industrial design, the fields such as biologic medical and aerospace.Principle based on Layered manufacturing, continues to develop out
Various 3D printing techniques include LOM, 3DP, SLA, FDM, SLS, SLM, EBM etc..The techniques such as SLA, SLS, SLM be all using
The characteristics of laser requires expensive high energy beam generating device as the energy, and it is expensive that there are equipment, complex process.3DP (three
Dimension printing technique) it is a kind of method for carrying out molding bonded to powder using binder, used powder has ceramic powders, gold
Belong to powder, molding sand etc..The technology is based on the layer-by-layer accumulation forming principle of dispersed material, the digitlization according to Three-dimensional Design Software design
The three-dimensional data of part successively carries out spraying bonding to powder, finally obtains solid forming part, being sintered later can
To obtain higher intensity.
Powder bonding equipment does not need to be equipped with laser aid, and simple in equipment is cheap, especially suitable for metal casting
Make the mold with ceramic shell.In addition 3 D-printing can be used for the demonstration and mechanical prototype related fields of Visualization Model.
For example, wherein expected result can model manufacture before executing the program in medicine and dental field.
Although 3 D-printing powder bonding technology has in manufacture mold and has great advantage, wherein also some difficulties are needed
Overcome, such as spray head can be made to block using colloidal bond, and then influence the precision and effect of manufacture, in addition organic binder
Toxic gas pollution environment etc. can be generated during the sintering process, these difficulties limit 3 D-printing powder bonding to a certain extent
The application of technology.
Summary of the invention
The shortcomings that it is an object of the invention to overcome the above-mentioned prior art and deficiency provide a kind of 3D based on water-soluble effect
Print powder bonding method, this method more clean and environmental protection compared with the existing technology.
The present invention is achieved through the following technical solutions:
A kind of 3D printing powder bonding method based on water-soluble effect, includes the following steps:
Step 1: by finished ground cement particle and being filled primarily with powder particle, is packed into powder after mixing according to the ratio uniform of 4:1
In material cylinder, raw material powder is obtained；
Aqueous solution is connected to piezo jets, moulding cylinder rises to highest stroke；
Step 2: power spreading device is preset into moulding cylinder by the raw material powder in powder cylinder；
Step 3: piezo jets spray aqueous solution according to part section graphical information, and aqueous solution makes finished ground cement particle
Dissolution, to cement fluid permeability to being filled primarily between the gap of powder particle, makes to be filled primarily with powder particle root after solidification
It is adhesively fixed according to spraying area shape；Complete the bonding operation of first layer powder bonding layer；
Moulding cylinder declines a powder layer thickness, and power spreading device is preset to moulding cylinder by the raw material powder in powder cylinder again
On first layer powder bonding layer；Piezo jets spray aqueous solution according to part section graphical information, and aqueous solution makes finished ground cement
Grain dissolution makes to be filled primarily with powder after solidification to cement fluid permeability to being filled primarily between the gap of powder particle
Grain is adhesively fixed according to spraying area；Complete the bonding operation of second layer powder bonding layer；
Step 4: step 2 is repeated to step 3, until part blank forms；
Step 5: part blank is sintered, then carries out postorder polishing operation, obtains final molding part.
The finished ground cement particle is portland cement, aluminate cement or phosphate cement.
The powder particle that is filled primarily with is not soluble in water, belongs to inert material comprising polymer, ceramics or metal；
The finished ground cement particle size is about 5-10 μm；Being filled primarily with powder particle size is 10-40 μm.
Sintering processes described in step 5 are to carry out in vacuum heat treatment furnace, or carry out in an inert gas atmosphere.
During the sintering processes, the relationship between sintering temperature TS and melting temperature Tm is TS ≈ (0.3~0.4)
Tm。
The present invention compared with the existing technology, have following advantages and effects
1, it is not necessary that the heating of powder particle is melted during molding bonded, therefore the laser beam for not needing valuableness is sent out
Generating apparatus, molding bonded device structure is simple, at low cost.
2, ermal physics variation does not occur for powder particle during molding bonded, only simple bonding, simple process.
3, the complex parts that arbitrary shape can be formed, formed in do not need addition support, eliminate molding removal branch
The process of support, while also saving material.Simultaneously can also be very big with compact dimensions part.
4, for the binding force of powder bonding from the solidification of water-soluble cement, the strong bond effect having produces 3D printing
Product have quite high shape stability.
5, it can not only be blocked using aqueous solution spraying to avoid spray head caused by colloidal bond, but also more wiper ring
It protects.
6, it is nontoxic and pollution-free when molded blank part is sintered.
Detailed description of the invention
Fig. 1 is that the present invention is based on the 3D printing powder bonding process flow charts of water-soluble effect.
Fig. 2 is existing 3DP (three-dimensional printing technology) powder bonding device structure schematic diagram.
In figure: 1- raw material powder, 2- power spreading device, 3- powder cylinder, 4- moulding cylinder, 5- part blank, 6- piezo jets.
Specific embodiment
The present invention is more specifically described in detail combined with specific embodiments below.
The 3D printing powder bonding method based on water-soluble effect that the invention discloses a kind of, includes the following steps:
Step 1: by finished ground cement particle and being filled primarily with powder particle, is packed into powder after mixing according to the ratio uniform of 4:1
In material cylinder, raw material powder is obtained；
Aqueous solution is connected to piezo jets, moulding cylinder rises to highest stroke；
Step 2: power spreading device is preset into moulding cylinder by the raw material powder in powder cylinder；
Step 3: piezo jets spray aqueous solution according to part section graphical information, and aqueous solution makes finished ground cement particle
Dissolution, to cement fluid permeability to being filled primarily between the gap of powder particle, makes to be filled primarily with powder particle root after solidification
It is adhesively fixed according to spraying area shape；Complete the bonding operation of first layer powder bonding layer；
Moulding cylinder declines a powder layer thickness, and power spreading device is preset to moulding cylinder by the raw material powder in powder cylinder again
On first layer powder bonding layer；Piezo jets spray aqueous solution according to part section graphical information, and aqueous solution makes finished ground cement
Grain dissolution makes to be filled primarily with powder after solidification to cement fluid permeability to being filled primarily between the gap of powder particle
Grain is adhesively fixed according to spraying area；Complete the bonding operation of second layer powder bonding layer；
Can be added in raw material powder desiccant particle mixing, desiccant can make it is water-soluble after fluid cement quickly
Solidification bonding；
Step 4: step 2 is repeated to step 3, until part blank forms；
Step 5: part blank is sintered, then carries out postorder polishing operation, obtains final molding part.It burns
The purpose of knot processing is to eliminate the remaining stomata of inside parts, and part is made to become fine and close by loose, and interparticle bond strength increases,
Part machinery intensity improves.Sintering processes can make volume of part shrink, and size reduces, and this defect can be by being bonded to
Before type, dimension compensation is carried out to part to improve.
The finished ground cement particle is portland cement, aluminate cement or phosphate cement.
The powder particle that is filled primarily with is not soluble in water, belongs to inert material comprising polymer, ceramics or metal；
The finished ground cement particle size is about 5-10 μm；Being filled primarily with powder particle size is 10-40 μm.
Sintering processes described in step 5 are to carry out in vacuum heat treatment furnace, or carry out in an inert gas atmosphere, can
It prevents from aoxidizing in sintering process.
During the sintering processes, the relationship between sintering temperature TS and melting temperature Tm is TS ≈ (0.3~0.4)
Tm。
Aqueous solution (or aqueous solvent) uses high-dissolvability aqueous solution, and finished ground cement particle is enabled to quickly to dissolve.
As described above, the present invention can be better realized.
Embodiment of the present invention are not limited by the above embodiments, other are any without departing from Spirit Essence of the invention
With changes, modifications, substitutions, combinations, simplifications made under principle, equivalent substitute mode should be, be included in of the invention
Within protection scope.
Claims (6)
1. a kind of 3D printing powder bonding method based on water-soluble effect, it is characterised in that include the following steps:
Step 1: by finished ground cement particle and being filled primarily with powder particle, according to loading powder cylinder after the ratio uniform mixing of 4:1
It is interior, obtain raw material powder；
Aqueous solution is connected to piezo jets, moulding cylinder rises to highest stroke；
Step 2: power spreading device is preset into moulding cylinder by the raw material powder in powder cylinder；
Step 3: piezo jets spray aqueous solution according to part section graphical information, and aqueous solution makes finished ground cement grain dissolution,
To cement fluid permeability to being filled primarily between the gap of powder particle, to be filled primarily with powder particle after solidification according to spraying
Region shape is adhesively fixed；Complete the bonding operation of first layer powder bonding layer；
Moulding cylinder declines a powder layer thickness, and power spreading device is preset to the first of moulding cylinder by the raw material powder in powder cylinder again
On layer powder bonding layer；Piezo jets spray aqueous solution according to part section graphical information, and aqueous solution makes finished ground cement particle
Dissolution, to cement fluid permeability to being filled primarily between the gap of powder particle, makes to be filled primarily with powder particle root after solidification
It is adhesively fixed according to spraying area；Complete the bonding operation of second layer powder bonding layer；
Step 4: step 2 is repeated to step 3, until part blank forms；
Step 5: part blank is sintered, then carries out postorder polishing operation, obtains final molding part.
2. the 3D printing powder bonding method based on water-soluble effect according to claim 1, it is characterised in that: the cement powder
Last particle is portland cement, aluminate cement or phosphate cement.
3. the 3D printing powder bonding method based on water-soluble effect according to claim 2, it is characterised in that: described mainly to fill out
It is not soluble in water to fill powder particle, belongs to inert material comprising polymer, ceramics or metal.
4. the 3D printing powder bonding method based on water-soluble effect according to claim 3, it is characterised in that: the cement powder
Last particle size is about 5-10 μm；Being filled primarily with powder particle size is 10-40 μm.
5. the 3D printing powder bonding method based on water-soluble effect according to claim 4, it is characterised in that: described in step 5
Sintering processes are to carry out in vacuum heat treatment furnace, or carry out in an inert gas atmosphere.
6. the 3D printing powder bonding method based on water-soluble effect according to claim 5, it is characterised in that: at the sintering
During reason, the relationship between sintering temperature TS and melting temperature Tm is TS ≈ (0.3~0.4) Tm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810729339.3A CN108943324A (en) | 2018-07-04 | 2018-07-04 | A kind of 3D printing powder bonding method based on water-soluble effect |
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| CN201810729339.3A CN108943324A (en) | 2018-07-04 | 2018-07-04 | A kind of 3D printing powder bonding method based on water-soluble effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115042352A (en) * | 2022-06-13 | 2022-09-13 | 西北橡胶塑料研究设计院有限公司 | Photosensitive resin glue salt core for rubber profile based on 3D printing and preparation method thereof |
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2018
- 2018-07-04 CN CN201810729339.3A patent/CN108943324A/en active Pending
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| WO2013043908A1 (en) * | 2011-09-20 | 2013-03-28 | The Regents Of The University Of California | 3d printing powder compositions and methods of use |
| CN106042408A (en) * | 2016-06-22 | 2016-10-26 | 武汉易制科技有限公司 | Powder material used for 3D printing and powder 3D printing forming method |
| CN106903775A (en) * | 2017-01-17 | 2017-06-30 | 华南理工大学 | A kind of many shower nozzle Collaborative Control ceramic powders 3D forming methods |
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| CN115042352A (en) * | 2022-06-13 | 2022-09-13 | 西北橡胶塑料研究设计院有限公司 | Photosensitive resin glue salt core for rubber profile based on 3D printing and preparation method thereof |
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Application publication date: 20181207 |