CN106475521A - A kind of metal casting part preparation method based on 3D printing technique - Google Patents
A kind of metal casting part preparation method based on 3D printing technique Download PDFInfo
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- CN106475521A CN106475521A CN201610615212.XA CN201610615212A CN106475521A CN 106475521 A CN106475521 A CN 106475521A CN 201610615212 A CN201610615212 A CN 201610615212A CN 106475521 A CN106475521 A CN 106475521A
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- 238000010146 3D printing Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 83
- 238000002360 preparation method Methods 0.000 title claims abstract description 40
- 238000005058 metal casting Methods 0.000 title claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000005266 casting Methods 0.000 claims abstract description 21
- 238000012805 post-processing Methods 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000010257 thawing Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 87
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 33
- 239000002904 solvent Substances 0.000 claims description 30
- 238000005498 polishing Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 20
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 18
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 18
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 17
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- 238000000889 atomisation Methods 0.000 claims description 14
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 14
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 12
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 12
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 12
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 12
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 12
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 claims description 12
- 229920001169 thermoplastic Polymers 0.000 claims description 12
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- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 claims description 11
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- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 10
- -1 Merlon Polymers 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000007517 polishing process Methods 0.000 claims description 10
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- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Natural products CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 claims description 7
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- 238000001816 cooling Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
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- JOLQKTGDSGKSKJ-UHFFFAOYSA-N 1-ethoxypropan-2-ol Chemical compound CCOCC(C)O JOLQKTGDSGKSKJ-UHFFFAOYSA-N 0.000 claims description 6
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 6
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 6
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 6
- VNKYTQGIUYNRMY-UHFFFAOYSA-N methoxypropane Chemical compound CCCOC VNKYTQGIUYNRMY-UHFFFAOYSA-N 0.000 claims description 6
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 claims description 6
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 6
- 239000004626 polylactic acid Substances 0.000 claims description 6
- 238000002604 ultrasonography Methods 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 5
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 5
- 230000003746 surface roughness Effects 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 229920002160 Celluloid Polymers 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920001610 polycaprolactone Polymers 0.000 claims description 3
- 239000004632 polycaprolactone Substances 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 3
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims 1
- 239000000460 chlorine Substances 0.000 claims 1
- 229910052801 chlorine Inorganic materials 0.000 claims 1
- 235000019253 formic acid Nutrition 0.000 claims 1
- OJURWUUOVGOHJZ-UHFFFAOYSA-N methyl 2-[(2-acetyloxyphenyl)methyl-[2-[(2-acetyloxyphenyl)methyl-(2-methoxy-2-oxoethyl)amino]ethyl]amino]acetate Chemical compound C=1C=CC=C(OC(C)=O)C=1CN(CC(=O)OC)CCN(CC(=O)OC)CC1=CC=CC=C1OC(C)=O OJURWUUOVGOHJZ-UHFFFAOYSA-N 0.000 claims 1
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- 238000005516 engineering process Methods 0.000 description 15
- 239000000470 constituent Substances 0.000 description 10
- 238000001125 extrusion Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000006199 nebulizer Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
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- 230000000694 effects Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000007639 printing Methods 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000008188 pellet Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 238000005495 investment casting Methods 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 241000894007 species Species 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 2
- NIQCNGHVCWTJSM-UHFFFAOYSA-N Dimethyl phthalate Chemical compound COC(=O)C1=CC=CC=C1C(=O)OC NIQCNGHVCWTJSM-UHFFFAOYSA-N 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 description 1
- 229960001826 dimethylphthalate Drugs 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 150000002085 enols Chemical class 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002560 ketene acetals Chemical class 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000009688 liquid atomisation Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 239000004531 microgranule Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention discloses a kind of metal casting part preparation method based on 3D printing technique, including but not limited to following steps：（1）Obtain the 3D printing model of metal target cast member using 3D printing technique；（2）Post processing is polished to described 3D printing model；（3）Described 3D printing model after processing is obtained shell using casting technique；（4）Roasting is heated to described shell, so that the thorough fired vapour of described 3D printing model is disappeared, then the metal liquid of thawing is poured in described shell obtains metal casting part.By the way, present invention saves die cost, shorten part fabrication cycle, can conveniently realize the casting of intricate casting, the foundry goods obtaining has higher dimensional accuracy, surface smoothness and foundry goods concordance, is particularly suitable for the production of small lot complexity metal casting.
Description
Technical field
The present invention relates to a kind of metal casting part preparation method, more particularly to a kind of metal casting based on 3D printing technique
Forging piece preparation method.
Background technology
3D printing is also called increasing material manufacturing, be rise over nearly 30 years and a fast-developing class to be based on successively material addition former
The advanced manufacturing methods of reason.According to F42 committee of American Society Testing and Materials（ASTM Committee F42）Definition, 3D
Print and altogether comprise 7 sub- technology：Material is extruded（Material Extrusion）, injection of material（Material
Jetting）, binding agent injection（Binder Jetting）, container type photopolymerization（Vat Photopolymerization）, layer
Fold and make（Sheet Lamination）, powder bed merge（Powder Bed Fusion）, oriented energy deposition（Directed
Energy Fusion）.Wherein material extruded type, container type photopolymerization and powder bed integration technology are most widely used.Especially
Material extruded type 3D printing, due to advantages such as its relatively low equipment cost, the selection of wider material and preferable profiled member performances,
Obtained a wide range of applications in recent years.
3D printing be a kind of based on mathematical model file, to construct actual object by way of successively material stacking
Technology.Material extruded type technology is based on material in flowable state（As molten state, solution etc.）Under, the lower extrusion of the effect of being stressed, by
Layer is piled up and is solidified（As glassy transition, crystallization, solvent volatilization etc.）Thus building 3D object.Should in material extruded type 3D printing
It is referred to as Deformation In The Fdm Process with a relatively broad technology（fused deposition modeling）Or melting wire rod manufacture
（fused filament fabrication）, its ultimate principle is that the linearmaterial gear of thermal plastic high polymer is sent to one
Macromolecule is melted by the hot junction of individual high temperature, and move along part section profile and filling track in hot junction, squeeze the material of fusing simultaneously
Go out, material solidifies rapidly, and the material local fusing with surrounding.This process can constantly successively repeat, thus building three-dimensional article
Body.Each synusia is to pile up to form in preceding layer, and preceding layer plays positioning and the effect supporting to current layer.With height
The increase of degree, the area of synusia profile and shape all can change, and when shape has greatly changed, upper strata profile is just not
Sufficiently positioning and supporting role can be provided to current layer, this is accomplished by designing the supporting construction of some auxiliary, and succeeding layer is carried
For positioning and supporting, to ensure the smooth realization of forming process.
Technology due to all of 3D printing all builds object by way of successively manufacturing, and the surface of its printout is usual
Will occur being layered and more coarse.This point shows in material extruded type 3D printing technique and is especially apparent.Although for big
Most 3D printing techniques, can be by reducing floor height, selecting small size nozzle（For material extrusion）Mode in certain journey
Improve surface smoothness in degree, but this brings is all declining to a great extent and leading to cost increase of shaping efficiency.In addition can lead to
Cross the mode that surface polishing is carried out to printout and improve its surface quality, but traditional mechanical polishing typically require more artificial
Longer process time, deals with extremely difficult simultaneously for the complex printout of structure.
Casting be a kind of liquid metal is poured in the cavity casting from corresponding part or shape of product, treat metal cools to solid-state
Obtain the metal hot-working method of part or product afterwards.Casting is one of the most frequently used method for metal working, is widely used in system
Make in industry.
Lost wax process is a more conventional class technique in casting.Its core procedure includes：（1）Preparation corresponding final zero
The wax core of part shape, general by by the wax material of melting be injected into metal die, again cooling and demolding be prepared from；（2）By wax core
It is immersed in ceramic size and carries out starching process, then it is carried out with stucco and the dry shell forming it into hardening, this process can
Repeat repeatedly to have obtained the final shell of adequate thickness and intensity；（3）Dewaxing treatment is carried out to shell, typically passes through high temperature
Vapor or hot water treatment, make wax material melt and automatically flow out；（4）High-temperature roasting is carried out to shell, this process can remove remaining
Wax material, sinters shell simultaneously, improves its resistance to gentle intensity；（5）Liquid metal is cast in shell, after its natural cooling,
Shell is damaged by mechanical shock, obtains metalwork.
In recent years, occur in that application in metal casting for many 3D printings is attempted.Its main application idea is to be beaten with 3D
Print replaces the wax core in lost-wax casting, prepares the prototype of cast member with the mode of 3D printing.It is advantageous that and can save gold
Belong to the preparation of mould, shorten the cycle, also have very big advantage simultaneously for the cast member with labyrinth.But 3D printing exists
There is also than larger challenge in casting application.One of challenge is related to the surface quality of 3D printing.As described above, 3D printing
Build object by way of being successively superimposed, being layered all can occur in therefore printout surface.This point is for material extruded type 3D
Print performance to be especially apparent.If applied in casting, this skin lamination leads to the surface of metalwork same dividing also
Layer, leads to surface quality poor.This challenge also significantly limit 3D printing, and especially lower-cost material extruded type 3D beats
Application in metal casting for the print technology.
Disclose one kind in Chinese invention patent application CN104385593A and pass through spraying liquid wax material emulsion, applied
On photocuring printout surface thus the method reducing its surface roughness.But this method needs to prepare extra liquid wax material
Emulsion, and the physical property of emulsion is had higher requirements, increased the complexity of technique.The thickness of coating is also relatively difficult to simultaneously
It is precisely controlled.
In PCT Patent Application（Application number PCT/CN2015/081512）In, inventor discloses one kind and passes through microlayer model skill
The method that art does post processing to 3D printing part.Its method advantage is only to need using common solvent, efficiency high and no
Need additionally artificial.
But all do not mention in above-mentioned two patents and how to combine with casting technique, therefore can not direct substitution wax core
It is applied in metal casting.Therefore a kind of can improve surface quality of continuous castings, the metal casting part of application 3D printing technique
Preparation method is needed for existing market.
Content of the invention
The invention mainly solves the technical problem of providing a kind of metal casting part preparation method based on 3D printing technique,
Surface quality of continuous castings can be increased substantially, the features such as there is low cost, easily implement, be very suitable for large-scale industrial application.
For solving above-mentioned technical problem, one aspect of the present invention is：One kind is provided to be based on 3D printing technique
Metal casting part preparation method, including but not limited to following steps：（1）Metal target cast member is obtained using 3D printing technique
3D printing model；（2）Post processing is polished to described 3D printing model；（3）Described 3D printing model after processing is adopted
Obtain shell with casting technique；（4）Roasting is heated to described shell, so that the thorough fired vapour of described 3D printing model is disappeared, then
The metal liquid of thawing is poured in described shell and obtains metal casting part.
In a preferred embodiment of the present invention, step（1）Described in 3D printing technique be material extruded type 3D printing, appearance
Device formula photopolymerization 3D printing, powder bed merge one of 3D printing.
In a preferred embodiment of the present invention, step（1）Described in 3D printing technique be material extruded type 3D printing.
In a preferred embodiment of the present invention, step（1）Described in the constituent material of 3D printing model include one kind
Or multiple thermoplastic macromolecule material.
In a preferred embodiment of the present invention, step（1）Described in 3D printing model constituent material include following
One or more thermoplastic macromolecule material：Polylactic acid, acrylonitrile-butadiene-styrene copolymer ABS, Merlon, thermoplastic
Property polyurethane, polyvinyl alcohol, polyvinyl acetaldehyde compound, polyamide, polycaprolactone, poly terephthalic acid dimethyl ester PET
And its copolymer, polystyrene, high-impact base styrene or celluloid.
In a preferred embodiment of the present invention, step（1）Described in 3D printing model constituent material include following
One or more thermoplastic macromolecule material：Polylactic acid, acrylonitrile-butadiene-styrene copolymer ABS or Pioloform, polyvinyl acetal
Class compound.
In a preferred embodiment of the present invention, step（1）Described in the constituent material of 3D printing model include poly- second
Ketene acetal class compound.
In a preferred embodiment of the present invention, step（1）Described in the constituent material of 3D printing model include poly- second
Enol butyral PVB.
In a preferred embodiment of the present invention, step（1）Described in 3D printing model constituent material in polyvinyl alcohol
The mass fraction of butyral is more than or equal to 50%.
In a preferred embodiment of the present invention, step（1）Described in 3D printing model constituent material residual ash
Less than or equal to 0.5%.
In a preferred embodiment of the present invention, step（1）Described in 3D printing model can dissolve or be partially dissolved in liquid
In body.
In a preferred embodiment of the present invention, step（1）Described in 3D printing model can dissolve or partly soluble liquid
Body is following one or more：Water, methanol, ethanol, normal propyl alcohol, isopropanol, n-amyl alcohol, benzyl alcohol, butanol, diacetone alcohol,
Propylene-glycol ethyl ether/methyl ether/propyl ether, acetone, butanone, cyclohexanone, dichloromethane, chloroform, methyl acetate, ethyl acetate, acetic acid
Butyl ester, acetic acid.
In a preferred embodiment of the present invention, step（1）Described in 3D printing model can dissolve or partly soluble liquid
Body is ethanol, isopropanol, water or any mixture comprising one or more of which.
In a preferred embodiment of the present invention, step（2）Described in polish post processing method comprise microlayer model polishing
One or more of method, solvent vapo(u)r method, solvent soaking method.
In a preferred embodiment of the present invention, step（2）Described in polish post processing method comprise microlayer model polishing
Method.
In a preferred embodiment of the present invention, step（2）Used in be atomized solvent used in microlayer model polishing processes
Equipment be one or more of ultrasound atomizer, micropore atomization device, jet flow type atomizer.
In a preferred embodiment of the present invention, step（2）Used in be atomized solvent used in microlayer model polishing processes
Equipment be micropore atomization device.
In a preferred embodiment of the present invention, step（2）Described in polishing post processing in use including following one
Plant or multi-solvents, and the arbitrary proportion mixture with water：Methanol, ethanol, normal propyl alcohol, isopropanol, n-amyl alcohol, benzyl alcohol,
Butanol, diacetone alcohol, propylene-glycol ethyl ether/methyl ether/propyl ether, acetone, butanone, cyclohexanone, dichloromethane, chloroform, methyl acetate,
Ethyl acetate, butyl acetate, acetic acid.
In a preferred embodiment of the present invention, step（2）Described in the solvent that adopts in polishing post processing be ethanol, different
Propanol, water or any mixture comprising one or more of which.
In a preferred embodiment of the present invention, step（2）The surface roughness of the 3D printing model after middle process meets：
Rz is less than or equal to 10 microns.
In a preferred embodiment of the present invention, step（4）Described in heat roasting temperature be more than or equal to 600 DEG C.
In a preferred embodiment of the present invention, step（4）Described in heat roasting time between 20-180 minute.
In a preferred embodiment of the present invention, step（4）In also include, before casting, by baked shell from
So it is cooled to room temperature, secondary cleaning is carried out to the shell after cooling, the shell after cleaning is carried out heating roasting again.
In a preferred embodiment of the present invention, step（4）In be using water, solvent, compression to the secondary cleaning of shell
One or more of air is carried out.
The invention has the beneficial effects as follows：The metal casting part preparation method based on 3D printing technique of the present invention, saves
Die cost, shortens part fabrication cycle, can conveniently realize the casting of intricate casting, and the foundry goods obtaining has higher chi
Very little precision, surface smoothness and foundry goods concordance, are particularly suitable for the production of small lot complexity metal casting.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, will make to required in embodiment description below
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained other according to these accompanying drawings
Accompanying drawing, wherein：
Fig. 1 is the process flow diagram of metal casting part preparation method one preferred embodiment based on 3D printing of the present invention；
Fig. 2 is the TGA test chart of 3D printing material in a preferred embodiment of the present invention.
Specific embodiment
The enforcement it is clear that described will be clearly and completely described to the technical scheme in the embodiment of the present invention below
Example is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiment that technical staff is obtained under the premise of not making creative work, broadly falls into the model of present invention protection
Enclose.
A kind of metal casting part preparation method based on 3D printing please be provided, including step be：
（1）The preparation of 3D printing wire rod：
It is divided into PVB resin -1, PVB resin -2, antioxidant, pigment to carry out proportioning according to group, the molecular weight of wherein PVB resin -1 is
3000g/mol, viscosity is 35-60mPas（10% ethanol solution）, the molecular weight of PVB resin -2 is 6000g/mol, and viscosity is
160-260mPas（10% ethanol solution）, antioxidant is BASF B215, and pigment is Clariant Scarlet 4RF.Described each
The mass fraction that component accounts for gross weight is：PVB resin -1 30%, PVB resin -2 69%, antioxidant 0.5%, pigment 0.5%.
By above-mentioned each component mix homogeneously, put into plasticizing in 20 mm parallel dual-screw extruding machines and extrude and use pelletizing
Machine pelletize, twin screw prilling is as follows：
The pellet of above-mentioned preparation is dried, is then added in 20 mm single screw extrusion machines, its extruder is set and adds
Material section, the temperature of compression section, metering section and cylindrical mouth mould are respectively 180 DEG C, 190 DEG C, 200 DEG C and 200 DEG C（Can be according to reality
Situation adjusts）.The melt of extrusion through water-carrying groove cooling, air-dry and traction machine stretching after be prepared into diameter and be about 1.75 millimeters of list
Silk, and wound.Monofilament material after winding can be directly used for material extruded type, FDM or FFF 3D printing, general printing temperature
Degree is between 185-220 DEG C.
（2）The degraded ash test of 3D printing material
By step（1）The monofilament sampling about 9mg of extrusion carries out thermogravimetic analysis (TGA)（TGA）Test（Test equipment：Platinum Ai Ermo
STA6000）, test environment air atmosphere, it is warming up to 800 DEG C with the heating rate of 10 DEG C/min at room temperature.Fig. 2 is sampling monofilament
TGA test chart, as can be observed from Figure monofilament sample after being warming up to 600 DEG C all gasification disappear, w residual<
0.1%.
（3）Obtain the 3D printing model of metal target cast member using 3D printing technique
The 3D printing technique that can use in the technology of the present invention is material extrusion（Material Extrusion）, injection of material
（Material Jetting）, binding agent injection（Binder Jetting）, container type photopolymerization（Vat
Photopolymerization）, stacking manufacture（Sheet Lamination）, powder bed merge（Powder Bed
Fusion）, oriented energy deposition（Directed Energy Fusion）Any one of.Preferably, the 3D printing of use
Technology can merge any one of 3D printing for material extruded type 3D printing, container type photopolymerization 3D printing, powder bed.?
Preferably, the 3D printing technique of use is material extruded type 3D printing.
Described material extruded type 3D printing can use the raw material of multiple different shapes, such as pellet, powder, solution, wire rod
Deng.Modal material extruded type 3D printing uses wire rod, and this kind of technology is generally referred to as fused glass pellet（fused
Deposition modeling or FDM）Or melting wire rod manufacture（Fused filament fabrication or FFF）.Wire rod
Usually require that continuous and uniform diameter.Modal wire rod average diameter is in 1.75 mm, 2.85 mm or 3 mm.
Used in this example, 3D printing technique is material extruded type 3D printing, generally referred to as fused glass pellet
（Fused deposition modeling or FDM）Or melting wire rod manufacture（Fused filament fabrication or
FFF）.The design parameter printing is set to：Print temperature：220 DEG C, floor height：0.2mm, filling rate：20%th, print speed：45mm/
S, outer casing thickness：0.8mm, bottom and top layer（Completely filled layer）Thickness：0.8mm.
The technical scheme steps that the present invention announces（1）The constituent material of middle 3D printing model includes one or more thermoplastic
Property macromolecular material.Preferably, described thermoplastic macromolecule material is polylactic acid, acrylonitrile-butadiene-styrene copolymer
ABS, Merlon, thermoplastic polyurethane, polyvinyl alcohol, polyvinyl acetaldehyde compound, polyamide, polycaprolactone, poly- right
Dimethyl phthalate PET and its copolymer, polystyrene, high-impact base styrene or celluloid.It is highly preferred that it is described
Thermoplastic macromolecule material is polylactic acid, acrylonitrile-butadiene-styrene copolymer ABS or polyvinyl acetaldehyde compound.
More it is highly preferred that described thermoplastic macromolecule material is polyvinyl acetaldehyde compound.Most preferably, described thermoplasticity high score
Sub- material is polyvinyl butyral resin PVB, the quality of polyvinyl butyral resin in the constituent material of wherein said 3D printing model
Fraction is more than or equal to 50%.
The constituent material of 3D printing model needs there is relatively low residual ash after high-temperature roasting.The sign side of residual ash
Method can be：Weigh certain mass（m1）Material sample, is heated to it and temperature that metal casting Baking temperature is close
Scope（As 600-1200 DEG C）, after it is fully degraded, weigh remaining non-degradable component（Ash）Quality（m2）, and calculate residual
Ash is stayed to account for the percentage ratio of initial mass（m2/m1×100%）.The percent ash of heretofore described thermoplastic macromolecule material
Typically should be below 0.5%.Preferably, percent ash is below 0.1%.
Described in the technical scheme that the present invention announces, 3D printing model can dissolve or be partially dissolved in liquid；Preferably,
Described liquid be water, methanol, ethanol, normal propyl alcohol, isopropanol, n-amyl alcohol, benzyl alcohol, butanol, diacetone alcohol, propylene-glycol ethyl ether/
In methyl ether/propyl ether, acetone, butanone, cyclohexanone, dichloromethane, chloroform, methyl acetate, ethyl acetate, butyl acetate, acetic acid
One or more；Most preferably, described liquid is ethanol, isopropanol, water or any mixing comprising one or more of which
Thing.
Complex degree of structure depending on 3D printing model and the equipment of 3D printing, except constituting the molding of 3D printing model
It is also possible to use one or more backing material outside material.The purposes of backing material is to be 3D printing mould during 3D printing
The overhanging portion of type provides interim support.After the completion of printing, backing material can be entered by modes such as direct stripping, dissolvings
Row removes.
General 3D printing model surface generally all can have obvious layering, and its floor height is relevant with printing technology, but generally exists
Between 0.05-0.3 mm, or in 0.2 mm about.This layering leads to 3D printing model surface coarse, and its roughness can use
Maximum height of the profile（Rz）To characterize, its definition is：In the distance between sample length Internal periphery summit line and valley line.Generally
3D printing model printed rear Rz can be between tens of to hundreds of microns.Larger roughness can lead to final metalwork surface
Poor quality, reduces the range of metalwork, or needs substantial amounts of rear polishing, labor intensive.It is thus desirable to carrying out processing step
Suddenly.
（4）Post processing is polished to described 3D printing model
The described 3D printing model printing the PVB material completing is put in the confined space containing a micropore atomization device, molten
Agent uses the ethanol of 95% concentration.Nebulizer core is a piece of micropore atomization containing 380 8 μm of apertures, frequency of vibration 112Khz
Piece, described 3D printing model polishes 30min in the ethanol fog that micropore atomization device produces.
Post processing is polished to described 3D printing model, can reduce or eliminate the layer gap on prototype surface, reduce prototype
The surface roughness of part.Traditional finishing method is mechanical polishing, is not suitable for the macromolecular material of many, and labor intensive.Institute
State polishing post processing preferably finishing method and include solvent vapo(u)r method, solvent soaking method and microlayer model polishing processes.
Described solvent vapo(u)r method typically takes the solvent of the macromolecular material being used dissolvable printout to be heated to boiling
More than point, so that printout is exposed in solvent vapo(u)r, rely on the macromolecular material that steam dissolves printout surface to reach polishing effect
Really.Advantage is that polishing efficiency is high, and shortcoming is to be easily lost a large amount of details and due to needing heated solvent to make in operating process
Danger coefficient is higher.
Described solvent soaking method is typically taken to be directly immersed in take out after a period of time in solvent by printout and is dried, and advantage is grasped
Make simple, shortcoming is to be difficult to control to polishing effect, and printout is easily deformed.
Described microlayer model polishing processes are that solvent is atomized into aerosol form full of entirely airtight by nebulizer by solvent
Container, the solvent droplet being atomized out constantly sticks to printout top layer, and top layer is dissolved, and the top layer after dissolving can be flowed automatically
Equal and fill up the layer gap of part prototypic surface, reach the effect of polishing.Described polishing post processing optimally takes microlayer model to polish
Method.
Nebulizer in described microlayer model polishing processes can be using ultrasound atomizer, micropore atomization device or jet flow type atomizer
One or more of.Described microlayer model polishing processes optimally take micropore atomization device.
Ultrasound atomizer（Ultrasonic wave nebulizer）Principle be using ultrasonic directional pressure, make liquid
, there is cavitation around the liquid level of protuberance, make the liquid atomization into micron-sized aerosol in body surface elevation.This ultrasonic atomizatio
Device is by electronics high frequency oscillation（Frequency of oscillation is 1.7MHz or 2.4MHz, exceedes the range of audibility of people, this electronic pair
Human body animal fanout free region）, by the high-frequency resonant of ceramic atomizing piece, liquid structure is broken up and produces the elegant fog of nature,
It is not required to heat or add any chemical reagent.Just can must work after this nebulizer submergence in a liquid during use.
Micropore atomization device（Vibrating mesh technology）Principle be the gold by the use of ultrasound wave as power source
Belong to micro pore sheet to be connected with ultrasound piezoelectric pottery, micropore metal panel vibration is driven by piezoelectric ceramics, by metal plate micropore
Overflow the liquid coming will be upspring, form fog.The key element of described micropore atomization device is metal micro-holes piece, metal micro-holes
The key of piece is exactly metal micro-holes.Be suitable on the metal micro-holes piece of the present invention generally having 200-1000 micropore, micropore straight
Footpath is generally less than 10 microns.Micropore atomization piece is excellent with the water suction at micropore metal piece back face by one, by liquid assimilating
Surface to metal micro-holes piece.Due to the vibration of metal micro-holes piece, the liquid on water suction rod passes through the micropore of metal micro-holes piece
It is transferred to upper surface, and got up by ejection on an upper, the fog required for producing, realize atomizing functions.
Jet flow type atomizer（Jet nebulizer）It is to be designed according to venturi (Venturi) ejector principle, utilize
Compressed air is passed through the tiny mouth of pipe and is formed high velocity air, and the negative pressure of generation drives liquid to be ejected into together on obstacle, at a high speed
Make drop become the microgranule that nebulizes under shock to spray to around splashing from spout.
The solvent adopting in polishing post processing can be selected according to the concrete species of moulding material.Preferably, described
The solvent adopting in polishing post processing includes following one or more, and the arbitrary proportion mixture with water：Methanol, second
Alcohol, normal propyl alcohol, isopropanol, n-amyl alcohol, benzyl alcohol, butanol, diacetone alcohol, propylene-glycol ethyl ether/methyl ether/propyl ether, acetone, first and second
Ketone, cyclohexanone, dichloromethane, chloroform, methyl acetate, ethyl acetate, butyl acetate, acetic acid.
3D printing model surface roughness Rz after process is typically in some tens of pm or following.Preferably, the 3D after process
Printer model Rz≤10 micron.
The hierarchy that 3D printing model surface is brought by 3D printing technique can be smoothed by polishing post-processing approach,
Thus improving prototype and the surface smoothness of final metal casting part.
（5）Metal casting
After processing after a polish, can be by the described 3D printing model after processing and running and feeding system（Typically use the preparation of wax material）Group
It is combined, the step being integrally formed module.The step for be often also referred to as " group number ".The method of module group assembling has welding
Method, bonding method and mechanical package method etc..This belongs to the usual step of lost-wax casting.
The general method of described casting technique is by 3D printing model（Comprise the 3D printing model being assembled into module）Dip-coating
Fireproof coating, sprinkles material shape refractory material, then the step such as drying, hardening, and is generally repeated as repeatedly, making fire resisting be coated with layer and reaching
Till the thickness needing.So multilayer shell is just defined on module, generally parked a period of time so as to fully hard
Change, obtain final multilayer shell.This step is also the shell forming method being typically used in lost-wax casting, can be according to actual need
Ask and be adjusted.
Hydrodewaxing step can also be carried out afterwards.The step for main purpose be remove composition running and feeding system wax material simultaneously
It is reclaimed.The method that can use includes steam dewaxing method, hot water dewaxing's method etc., can be selected according to practical situation
Select.
Again to the heating simultaneously roasting of described shell, the metal liquid of thawing is poured in described shell and obtains metal casting
Part.The purpose carrying out roasting to shell is burn off printout and the wax material participating in, and forms clean cavity, improves shell simultaneously
Resistance to gentle intensity.Sintering temperature T can be selected according to factors such as concrete technology requirement, casting metals species.Generally speaking T is not
Less than 600 DEG C.Preferably, T is between 600-1450 DEG C.Roasting time t can also be selected according to process conditions, general and
Speech t is not less than 20 minutes.Preferably, t is between 20-180 minute.
Shell after roasting is taken out from high-temperature roasting furnace and directly toward shell interior casting molten metal liquid.Treat shell
Carry out vibrations shelling after cooling, remove the hard shell being coated on cast outer surface.Also can carry out polishing, sandblasting, after polishing etc.
Treatment process, to improve the surface quality of foundry goods, is finally obtained metal target foundry goods.
The extra step that shell is carried out can be included after shell after roasting is taken out from high-temperature roasting furnace.
It is specially：Baked shell is naturally cooled to after room temperature, shell interior is passed to water, solvent, in compressed air
One or more mode is carried out, and the shell after cleaning is carried out heating roasting again.Preferably, it is to make to the cleaning of shell
It is carried out with water.After cleaning, shell can carry out again to it being warming up to T ' and carries out roasting, and roasting time is t '.T ', t ' are permissible
Same or like with T, t it is also possible to be adjusted according to casting metal and the species of technique.
Concretely comprise the following steps：
1）Using laminar flatiron welded together to the described 3D printing model after processing and general wax pattern.By overall resinogen
Type carries out successively Ludox hanging stucco shell, wherein often hangs once to starch and accordingly spreads one layer of sand, is dried firmly etc. preceding layer shell
Next stratotype shell of hanging stucco system again after change, and except spread after hanging first zircon sand as surface layer sand in addition to stucco is all every time below
With Mo Laisha, 4～6 Ludox hanging stucco process are so repeated, then carry out Ludox seal mortar treatent again, treat it
After hardening is dried, shell completes.
2）Shell after hardening is put into 1 hour in 90 DEG C of hot water, slough the wax of general wax pattern.
3）The shell sloughing general wax pattern is put into 1000 DEG C of roasting kiln roasting 50 minutes, make the 3D printing in shell
Mock up ignition gasification disappears.
4）Take out shell and be cooled to room temperature, using clear water wash type intracavity portion 4-5 time repeatedly.
5）Shell after cleaning is placed again into roasting 20 minutes in 1000 DEG C of roaster, prepares casting.
6）Shell is taken out from high-temperature roasting furnace and directly pours into a mould melting stainless steel 304 molten metal toward shell interior.
7）Carry out vibrations shelling after shell cooling, remove the hard shell being coated on cast outer surface, finally carry out beating
The postprocessing working procedures such as mill, sandblasting, polishing, to improve the surface quality of foundry goods, are finally obtained the accurate gold of metal target cast member
Belong to foundry goods.
The foregoing is only embodiments of the invention, not thereby limit the present invention the scope of the claims, every using this
Equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in the technology neck of other correlations
Domain, is included within the scope of the present invention.
Claims (24)
1. a kind of metal casting part preparation method based on 3D printing technique is it is characterised in that including but not limited to following steps：
（1）Obtain the 3D printing model of metal target cast member using 3D printing technique；（2）After described 3D printing model is polished
Process；（3）Described 3D printing model after processing is obtained shell using casting technique；（4）Roasting is heated to described shell, makes
The thorough fired vapour of described 3D printing model disappears, then the metal liquid of thawing is poured in described shell obtains metal casting
Part.
2. preparation method according to claim 1 is it is characterised in that step（1）Described in 3D printing technique for material squeeze
Go out one of formula 3D printing, container type photopolymerization 3D printing, powder bed fusion 3D printing.
3. preparation method according to claim 2 is it is characterised in that step（1）Described in 3D printing technique for material squeeze
Go out formula 3D printing.
4. preparation method according to claim 1 is it is characterised in that step（1）Described in 3D printing model composition material
Material includes one or more thermoplastic macromolecule material.
5. preparation method according to claim 4 is it is characterised in that step（1）Described in 3D printing model composition material
Material includes one or more of thermoplastic macromolecule material：Polylactic acid, acrylonitrile-butadiene-styrene copolymer ABS,
Merlon, thermoplastic polyurethane, polyvinyl alcohol, polyvinyl acetaldehyde compound, polyamide, polycaprolactone, poly- to benzene two
Formic acid dimethyl ester PET and its copolymer, polystyrene, high-impact base styrene or celluloid.
6. preparation method according to claim 5 is it is characterised in that step（1）Described in 3D printing model composition material
Material includes one or more of thermoplastic macromolecule material：Polylactic acid, acrylonitrile-butadiene-styrene copolymer ABS or
Polyvinyl acetaldehyde compound.
7. preparation method according to claim 6 is it is characterised in that step（1）Described in 3D printing model composition material
Material includes polyvinyl acetaldehyde compound.
8. preparation method according to claim 7 is it is characterised in that step（1）Described in 3D printing model composition material
Material includes polyvinyl butyral resin PVB.
9. preparation method according to claim 8 is it is characterised in that step（1）Described in 3D printing model composition material
In material, the mass fraction of polyvinyl butyral resin is more than or equal to 50%.
10. preparation method according to claim 1 is it is characterised in that step（1）Described in 3D printing model composition material
The residual ash of material is less than or equal to 0.5%.
11. preparation methoies according to claim 1 are it is characterised in that step（1）Described in 3D printing model can dissolve or
It is partially dissolved in liquid.
12. preparation methoies according to claim 11 are it is characterised in that step（1）Described in 3D printing model can dissolve
Or partly soluble liquid is following one or more：Water, methanol, ethanol, normal propyl alcohol, isopropanol, n-amyl alcohol, benzyl alcohol,
Butanol, diacetone alcohol, propylene-glycol ethyl ether/methyl ether/propyl ether, acetone, butanone, cyclohexanone, dichloromethane, chloroform, methyl acetate,
Ethyl acetate, butyl acetate, acetic acid.
13. preparation methoies according to claim 12 are it is characterised in that step（1）Described in 3D printing model can dissolve
Or partly soluble liquid is ethanol, isopropanol, water or any mixture comprising one or more of which.
14. preparation methoies according to claim 1 are it is characterised in that step（2）Described in polish post processing method bag
One or more of polishing processes containing microlayer model, solvent vapo(u)r method, solvent soaking method.
15. preparation methoies according to claim 14 are it is characterised in that step（2）Described in polish post processing method
Comprise microlayer model polishing processes.
16. preparation methoies according to claim 15 are it is characterised in that step（2）Used in microlayer model polishing processes
The equipment of the atomization solvent using is one or more of ultrasound atomizer, micropore atomization device, jet flow type atomizer.
17. preparation methoies according to claim 16 are it is characterised in that step（2）Used in microlayer model polishing processes
The equipment of the atomization solvent using is micropore atomization device.
18. preparation methoies according to claim 1 are it is characterised in that step（2）Described in polishing post processing in use
Including one or more following solvent, and the arbitrary proportion mixture with water：Methanol, ethanol, normal propyl alcohol, isopropanol, just
Amylalcohol, benzyl alcohol, butanol, diacetone alcohol, propylene-glycol ethyl ether/methyl ether/propyl ether, acetone, butanone, cyclohexanone, dichloromethane, chlorine
Imitative, methyl acetate, ethyl acetate, butyl acetate, acetic acid.
19. preparation methoies according to claim 18 are it is characterised in that step（2）Described in polishing post processing in adopt
Solvent be ethanol, isopropanol, water or any mixture comprising one or more of which.
20. preparation methoies according to claim 1 are it is characterised in that step（2）The table of the 3D printing model after middle process
Surface roughness meets：Rz is less than or equal to 10 microns.
21. preparation methoies according to claim 1 are it is characterised in that step（4）Described in heat roasting temperature be more than
Or it is equal to 600 DEG C.
22. preparation methoies according to claim 1 are it is characterised in that step（4）Described in heat roasting time exist
Between 20-180 minute.
23. preparation methoies according to claim 1 are it is characterised in that step（4）In also include, before casting, will roast
The shell burning naturally cools to room temperature, carries out secondary cleaning to the shell after cooling, and the shell after cleaning is carried out adding again
Thermal bake-out.
24. preparation method according to claim 23 is it is characterised in that step（4）In be to make to the secondary cleaning of shell
It is carried out with one or more of water, solvent, compressed air.
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| PCT/CN2016/095068 WO2018023833A1 (en) | 2016-08-01 | 2016-08-12 | 3d printing technology-based metal casting manufacturing method |
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| Publication number | Publication date |
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| CN106475521B (en) | 2018-11-30 |
| WO2018023833A1 (en) | 2018-02-08 |
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