CN109438965A - Laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder - Google Patents
Laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder Download PDFInfo
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- CN109438965A CN109438965A CN201811206931.1A CN201811206931A CN109438965A CN 109438965 A CN109438965 A CN 109438965A CN 201811206931 A CN201811206931 A CN 201811206931A CN 109438965 A CN109438965 A CN 109438965A
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- laser
- powder
- glass microballoon
- polyurethane
- manufacturing technology
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- 239000000843 powder Substances 0.000 title claims abstract description 98
- 239000011521 glass Substances 0.000 title claims abstract description 83
- 239000004814 polyurethane Substances 0.000 title claims abstract description 73
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 73
- 239000002131 composite material Substances 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 238000005516 engineering process Methods 0.000 title claims abstract description 33
- 238000012545 processing Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000005245 sintering Methods 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 238000010348 incorporation Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 230000008602 contraction Effects 0.000 abstract description 3
- 238000000110 selective laser sintering Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/28—Glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
-
- 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
- B33Y70/00—Materials specially adapted for additive manufacturing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
Abstract
The present invention provides a kind of glass microballoon for selective laser sintering/polyurethane composite powder and preparation method thereof and application methods, and the present invention relates to a kind of composite powders and its preparation and application for laser sintered 3D manufacturing technology.The present invention is to solve it is existing it is laser sintered with polyurethane powder powder material prepare sintered part is at high cost, is also easy to produce the technical problems such as contraction and buckling deformation in process, a kind of laser sintered manufacturing technology glass microballoon/polyurethane composite powder and its preparation and sintering method are provided.Laser sintered 3D manufacturing technology polyurethane powder of the invention and hollow glass micropearl composition, volume ratio are (4~5): 1.The mode that laser beam scans in processing plane when laser sintered is subregion scanning, and laser power is 25~40W, and laser power is low.Glass microballoon of the invention/polyurethane composite powder is used for laser sintered 3D manufacturing field.
Description
Technical field
The present invention designs a kind of for laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder and its preparation side
Method
Background technique
Selective Laser Sintering is one kind of increasing material manufacturing, it is one kind using laser as energy source, passes through laser
Beam is sintered the powder of polymer, ceramics, metal or its compound equably in processing plane.Its course of work is, first
The very thin powder of uniform layer overlay is raw material on the table, and laser beam is under the control of calculator, by scanner with one
Fixed speed and energy density is scanned by the 2-D data in layering face.After laser beam flying, the powder of corresponding position
Just sinter certain thickness entity lamella into, the place that do not scan still maintains loose powdered.One layer scanned, then
It needs to be scanned next layer.Workbench is first reduced according to model layers thickness, powdering roller again paves powder, can
To start new one layer of scanning.Repeatedly, until scanning through structure at all levels.Remove excessive powder, and by polishing, drying etc.
Processing appropriate, can be obtained part.
Summary of the invention
The sintered part prepared the present invention is to solve existing laser sintered 3D manufacturing technology polyurethane powder powder material at
It is also easy to produce the technical problems such as contraction and buckling deformation in this height, process, a kind of laser sintered manufacturing technology glass is provided
Microballon/polyurethane composite powder and its preparation and sintering method.
Laser sintered 3D manufacturing technology of the invention by hollow glass micropearl and is gathered with glass microballoon/polyurethane composite powder
Urethane powder constituent；Wherein the volume ratio of polyurethane powder and hollow glass micropearl is (4~5): 1.
Above-mentioned laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder preparation method, by following step
It is rapid to carry out:
One, it after glass microballoon powder is dry, is sieved with vibrating sieving machine, obtains the glass microballoon powder of even particle size；
Two, by the volume ratio of polyurethane powder and glass microballoon be (4~5): 1 weigh the glass microballoon that step 1 obtains and
Polyurethane powder is added in high-speed mixer, the ground and mixed 10~12 under conditions of revolving speed is 1000~1200r/min
Hour, obtain laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder.
In preparation method of the invention, with vibrating sieving machine strength shaking-sieving, its particle will be made after the drying of glass microballoon powder
Uniform in size, then polyurethane powder and glass microballoon are uniformly mixed with high-speed mixer, are obtained partial size and are maximized the equal of dispersion
Matter powder not only avoids powder and clustering phenomena occurs, it helps glass microballoon is abundant by polyurethane particles in sintering process
It wraps up and is uniformly distributed in the base, to improve the mechanical performance of molded part.
Laser sintered side is carried out with glass microballoon/polyurethane composite powder using above-mentioned laser sintered 3D manufacturing technology
Method, comprising: laser sintered manufacturing technology is added to the powder supply cylinder of rapidform machine with glass microballoon/polyurethane composite powder
In, glass microballoon/polyurethane composite powder is equably layered in processing plane and is heated up by heater by powdering roller
To processing temperature, laser issues laser, and calculator controls the switch of laser and the angle of scanner, so that laser beam is adding
It is scanned in work plane according to corresponding two-dimensional slice, after laser beam is inswept, workbench moves down a thickness, then powdering, laser
Beam scanning obtains laser sintered part repeatedly；It is characterized in that the mode that wherein laser beam scans in processing plane is point
Sector scanning, laser power are 25~40W, and scanning speed 4000mm/s, sweep span is 0.15~0.20mm, powder layer thickness
For 0.1~0.2mm, processing temperature is 85~100 DEG C.
In laser sintered method of the invention, glass microballoon/polyurethane composite powder is under laser action, polyurethane
The high-energy that grain absorbs laser becomes molten condition, and glass microballoon particle is not undergone phase transition during the sintering process, does not need to melt
Melt heat, therefore energy needed for the composite powder sintering of unit volume is less, advantageously reduces laser power.Polyurethane powder
Hollow glass micropearl is added in end as inorganic filler, the buckling deformation phenomenon of molded part can be effectively reduced, improve dimensional accuracy,
And hollow glass micropearl microscopic appearance is spherical in rule, and the surface area of unit volume is small, small with the contact surface of polyurethane, and
It is also point contact between microballon, there is ball bearing effect, makes glass microballoon/polyurethane composite powder that there is good flowing
Property, it is easy to powdering.Glass microballoon of the invention/polyurethane composite powder laser sintered part average shrinkage ratio is 1.42%, than
Pure polyurethane powder reduces 50%, obtained sintered part surfacing, no warping phenomenon.
It is at low cost in laser sintered method of the invention, in addition to insert the compound of glass microballoon using polyurethane powder
The raw materials for production that material is manufactured as laser sintered 3D, glass microballoon/compound polyurethane material not only reduce production cost, but also tool
There are low-carbon environment-friendly and energy conservation advantage.And the material need not be modified processing to glass microballoon during the preparation process,
It ensure that molding precision, also reduce manufacturing cost because simplifying technique.
Specific embodiment
Specific embodiment 1: laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder of present embodiment
End is made of polyurethane powder and glass microballoon；Wherein the volume ratio of polyurethane powder and glass microballoon is 4:1.
Specific embodiment 2: the present embodiment is different from the first embodiment in that the glass microballoon is hollow glass
Glass microballon, partial size≤50 μm.Other are same as the specific embodiment one.
Specific embodiment 3: the present embodiment is different from the first and the second embodiment in that the polyurethane powder
Partial size≤60 μm.Other are the same as one or two specific embodiments.
Specific embodiment 4: laser sintered 3D manufacturing technology glass microballoon/poly- ammonia described in specific embodiment one
The preparation method of ester composite powder, sequentially includes the following steps:
One, it after glass microballoon is dry, is sieved with vibrating sieving machine, obtains the glass microballoon of even particle size
It two, is 4:1 weighs polyurethane powder and step 1 obtains sky by the volume ratio of polyurethane powder and glass microballoon
Heart glass microballoon, is added in high-speed mixer, mixes 10~12 hours under conditions of revolving speed is 1000~1200r/min,
Obtain laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder.
Specific embodiment 5: present embodiment and step 2 high speed mixing machine unlike specific embodiment four
Revolving speed is 1100r/min, and incorporation time is 11 hours.It is other identical as specific embodiment four.
Mixed process, mixing velocity and time avoid powder of the same race so that glass microballoon and polyurethane powder are evenly distributed
Clustering phenomena, so that glass microballoon can be wrapped up sufficiently and is uniformly distributed in polyurethane matrix during laser sintered, from
And better ensure that sintered part mechanical performance.
Specific embodiment 6: using laser sintered 3D manufacturing technology described in specific embodiment one with glass microballoon/
Polyurethane composite powder carries out laser sintered method, includes: that laser sintered manufacturing technology glass microballoon/polyurethane is compound
Powder is added in the powder supply cylinder of rapidform machine, and glass microballoon/polyurethane composite powder is equably layered on by powdering roller to be added
It is warming up to processing temperature in work plane and by heater, laser issues laser, and calculator controls the switch of laser
And the angle of scanner, so that laser beam scans in processing plane according to corresponding two-dimensional slice, and after laser beam is inswept, work
A thickness, then powdering are moved down as platform, laser beam flying obtains laser sintered part repeatedly；It is characterized in that wherein laser
The mode that beam scans in processing plane is subregion scanning, and laser power is 25~40W, and scanning speed 4000mm/s is swept
Retouching spacing is 0.15~0.20mm, and powder layer thickness is 0.1~0.2mm, and processing temperature is 85~100 DEG C.
Specific embodiment 7: present embodiment is unlike specific embodiment six: processing temperature is 100 DEG C.Its
He is identical as specific embodiment six.
With following verification experimental verification beneficial effects of the present invention:
Test 1: the laser sintered 3D manufacturing technology of this test is with glass microballoon/polyurethane composite powder by polyurethane powder
It is formed with hollow glass micropearl；Wherein the volume ratio of polyurethane powder and glass microballoon is 4:1.
Above-mentioned laser sintered 3D manufacturing technology with glass microballoon/polyurethane composite powder preparation method according to the following steps
It carries out:
One, it after glass microballoon is 24 hours dry under conditions of 30 DEG C, is sieved with vibrating sieving machine, obtaining granular size is 50 μm
Glass microballoon；
It two, is 4:1 weighs polyurethane powder and step 1 obtains glass by the volume ratio of polyurethane powder and glass microballoon
Glass microballon is added in ultra micro mixing machine, ground and mixed 10~12 hours under conditions of revolving speed is 1000r/min, is swashed
Light is sintered 3D manufacturing technology glass microballoon/polyurethane composite powder.
The laser sintered 3D manufacturing technology that this test obtains is that color is uniform, grain with glass microballoon/polyurethane composite powder
Diameter maximizes the homogeneous powder of dispersion.
Laser sintered side is carried out with glass microballoon/polyurethane composite powder using above-mentioned laser sintered 3D manufacturing technology
Method, it is specific as follows: laser sintered manufacturing technology is added to the powder supply of rapidform machine with glass microballoon/polyurethane composite powder
In cylinder, glass microballoon/polyurethane composite powder is equably layered in processing plane and is risen by heater by powdering roller
Temperature is to processing temperature, and laser issues laser, and calculator controls the switch of laser and the angle of scanner, so that laser beam exists
It processes in plane and is scanned according to corresponding two-dimensional slice, after laser beam is inswept, workbench moves down a thickness, then powdering, swashs
Light beam scanning, repeatedly, obtains laser sintered part；It is characterized in that the mode that wherein laser beam scans in processing plane is
Subregion scanning, laser power 25W, scanning speed 4000mm/s, sweep span 0.15mm, powder layer thickness 0.2mm,
Processing temperature is 90 DEG C.
The laser sintered part shrinking percentage that test 1 obtains is 1.42%.
This test is laser sintered using glass microballoon/polyurethane composite powder progress, laser sintered part is obtained, due to hollow
Glass microballoon has poor thermal conductivity, after being added in polyurethane powder, can effectively reduce the thermal coefficient of composite powder, changes
The disadvantages of being apt to laser sintered part contraction, buckling deformation, can effectively improve the dimensional accuracy of sintered part.
Do comparative experiments below simultaneously:
Test 2: this test is to use polyurethane powder progress laser sintered, laser sintered specific as follows: will be laser sintered
3D manufacturing technology is added in the powder supply cylinder of selective laser sintering with polyurethane powder, and powdering idler wheel is by polyurethane composite powder
It is equably layered in processing plane and is heated to processing temperature, laser issues laser, the switch of computer controlled laser
And the angle of scanner so that laser beam processing plane on according to corresponding two-dimensional slice form scan, laser beam is inswept it
Place, workbench moves down a thickness, then powdering, laser scanning terminate, and repeatedly, obtains laser sintered part；Wherein laser beam
The mode scanned in processing plane is subregion scanning, laser power 25W, scanning speed 4000mm/s, sweep span
For 0.15mm, powder layer thickness 0.2mm, processing temperature is 90 DEG C.
The sintered part shrinking percentage that test 2 obtains is 2.89%.
Pass through the comparison of test 1,2, it is known that the relatively test 2 of the shrinking percentage of 1 gained sintered part of test improves 51%.
Claims (6)
1. laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder, it is characterised in that glass microballoon/polyurethane is multiple
Powder is closed to be made of hollow glass micropearl and polyurethane powder；Wherein the volume ratio of polyurethane powder and hollow glass micropearl is (4
~5): 1.
2. laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder according to claim 1, feature exist
In the glass microballoon partial size be≤50 μm.
3. laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder according to claim 1 or 2, special
Sign is that the partial size of polyurethane powder is≤60 μm.
4. the method for preparing laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder described in claim 1,
It is characterized in that this method sequentially includes the following steps:
One, it after glass microballoon is dry, is sieved with vibrating sieving machine, obtains the glass microballoon of even particle size.
Two, be (4~5) by the volume ratio of polyurethane powder and glass microballoon: 1 weighs polyurethane powder and glass that step 1 obtains
Glass microballon, is added in high-speed mixer, ground and mixed 10~12 hours under conditions of revolving speed is 1000~1200r/min,
Obtain laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder.
5. laser sintered 3D manufacturing technology according to claim 4 glass microballoon/polyurethane composite powder preparation side
Method, it is characterised in that the revolving speed of step 2 high speed mixing machine is 1100r/min, and incorporation time is 11 hours.
6. carrying out laser with glass microballoon/polyurethane composite powder using laser sintered 3D manufacturing technology described in claim 1
The method of sintering, comprising: laser sintered 3D manufacturing technology is added to selective laser with glass microballoon/polyurethane composite powder
In the powder supply cylinder of sinter molding machine, glass microballoon/polyurethane composite powder is equably layered in processing plane simultaneously by powdering idler wheel
It is heated to processing temperature, laser issues laser, and calculator controls the switch of laser and the angle of scanner, so that laser
Beam scans in processing plane according to corresponding two-dimensional slice, and after laser beam is inswept, workbench moves down a thickness, repaves
Powder, laser beam flying obtain laser sintered part repeatedly；It is characterized in that wherein laser beam scans in processing plane
Mode is subregion scanning, and laser power is 25~40W, and scanning speed 4000mm/s, sweep span is 0.15~0.20mm,
Powder layer thickness is 0.1~0.2mm, and processing temperature is 85~100 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811206931.1A CN109438965A (en) | 2018-10-17 | 2018-10-17 | Laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811206931.1A CN109438965A (en) | 2018-10-17 | 2018-10-17 | Laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder |
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| CN201811206931.1A Pending CN109438965A (en) | 2018-10-17 | 2018-10-17 | Laser sintered 3D manufacturing technology glass microballoon/polyurethane composite powder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568219A (en) * | 2019-08-27 | 2019-12-13 | 北京自动化控制设备研究所 | Sintering device and method for molecular electronic type angular acceleration electromechanical converter |
| CN113293068A (en) * | 2021-05-21 | 2021-08-24 | 华能济南黄台发电有限公司 | Cleaning fluid suitable for plate heat exchanger and preparation method thereof |
| CN115975372A (en) * | 2022-12-29 | 2023-04-18 | 重庆交通大学绿色航空技术研究院 | Wave-absorbing polyurethane composite foam and preparation method thereof |
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| CN113293068A (en) * | 2021-05-21 | 2021-08-24 | 华能济南黄台发电有限公司 | Cleaning fluid suitable for plate heat exchanger and preparation method thereof |
| CN115975372A (en) * | 2022-12-29 | 2023-04-18 | 重庆交通大学绿色航空技术研究院 | Wave-absorbing polyurethane composite foam and preparation method thereof |
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Application publication date: 20190308 |