CN106926453A - A kind of method that laser sintered 3D printing precoated sand is prepared for adhesive with sugar - Google Patents
A kind of method that laser sintered 3D printing precoated sand is prepared for adhesive with sugar Download PDFInfo
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- CN106926453A CN106926453A CN201710128228.2A CN201710128228A CN106926453A CN 106926453 A CN106926453 A CN 106926453A CN 201710128228 A CN201710128228 A CN 201710128228A CN 106926453 A CN106926453 A CN 106926453A
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- sand
- laser sintered
- sugar
- precoated sand
- nice foundry
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- 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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- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
Abstract
The invention discloses a kind of method for preparing laser sintered 3D printing precoated sand for adhesive with sugar, it is characterized in that, after nice foundry sand is cleaned with water first, it is immersed in the aqueous solution of the cetyl trimethylammonium bromide that mass percentage concentration is 5 ~ 6%, room temperature places 48h, separation of solid and liquid, dries, and obtains pre-processing nice foundry sand；Then, in the reactor, added by mass percentage concentration, water：38% ~ 44%, white sugar：2% ~ 6%, pre-process nice foundry sand：52% ~ 56%, diethylenetriamines：0.2% ~ 1.0%, polyethylene glycol：0.2% ~ 2.0%, each component sum is for absolutely, strong stirring, temperature rises to 160 ~ 170 DEG C, until moisture evaporation is finished, 120 mesh sieves are crossed in grinding, obtain laser sintered 3D printing precoated sand.The precoated sand using it is laser sintered can straight forming, good fluidity, formed precision is high, and with process is simple, low production cost, it is easy to industrialized production.
Description
Technical field
The present invention relates to a kind of preparation method of laser sintered 3D printing rapid shaping powder body material, belong to rapid shaping
Material Field, it is more particularly to a kind of to be beaten for adhesive prepares the method and laser sintered 3D of laser sintered 3D printing precoated sand with sugar
It is printed as type.
Background technology
Sugar is the refined sugar that the molasses squeezed out by sugarcane and beet are made, and is contracted by each molecular dehydration of glucose and fructose
The disaccharide of the irreducibility closed, is heated to 160 DEG C, is just melted into thick transparent liquid, is crystallized again during cooling.
Extending heating time, sucrose is to be decomposed into glucose and anhydrofructose.Under 190~220 DEG C of higher temperature, sucrose is just dehydrated
Condensation turns into caramel.Caramel has very strong cementation, can make powder adhesion together, plays a part of binding agent.Adopt
Replace chemical adhesive as adhesive with sugar, reduce problem of environmental pollution.
Nice foundry sand also known as electric smelting haydite, are the senior substitutes of quartz sand.The advantage of quartz sand is widely distributed, low cost
It is honest and clean；But its shortcoming is also quite obvious：One is the big coefficient of expansion, and casting accuracy is low；Two is serious scab, and sand removal is stranded
It is difficult.Study carefully its because, be that quartz has the generation of various allomorphisms at different temperature, Volume Changes are big；By refractoriness (quartz
The refractoriness of sand is between 1400~1700 DEG C) limitation, local (position that hole, the groove and thermal center are concentrated) scab of casting is serious,
Cleaning is very difficult.Disadvantages mentioned above is particularly acute in the production of large-scale steel-casting.Nice foundry sand can overcome these shortcomings, so that greatly
The big quality that improve casting.Nice foundry sand is, with fine aluminum vanadine as raw material, to be made through techniques such as calcining, electric smelting, granulation, sub-sieves
Into.
Precoated sand (coated sand).Sand grain surface is covered with one layer of molding sand or core sand of hard resin film before moulding.
There are two kinds of coating techniques of cold process and Re Fa：Cold process ethanol dissolves resin, and methenamine is added during mulling, makes two
Person is coated on sand grain surface, and ethanol volatilization obtains precoated sand；Sand is preheating to uniform temperature by hot method, plus resin melts it, stirring
Make resin-coating in sand grain surface, plus the methenamine aqueous solution and lubricant, cool down, crush, sieving and to obtain precoated sand.For cast steel
Part, ironcasting.Precoated sand is invented during World War II by German clo doctor Ning, and its technical process is by the heat of powdery
Solidity phenolic resin and nice foundry sand mechanical mixture, solidify during heating.After develop into thermoplastic phenolic resin plus latent curing
Agent (methenamine) and lubricant are configured to precoated sand by certain coating technique, and sand grains table is coated on when precoated sand is heated
The resin melting in face, in the presence of the methylene that methenamine is decomposited, the resin of melting is rapidly transformed into by linear structure
The three-dimensional-structure not melted, so that precoated sand curing molding.
Laser sintered 3D printing belongs to a kind of method of increasing material manufacturing.This technique is also, with laser as energy source, to lead to
Crossing laser beam makes the powder of plastics, wax, ceramics, metal or its compound equably be sintered in processing plane.On the table
The uniform very thin powder of layer overlay as raw material, laser beam under control of the computer, by scanner with certain speed
Scanned by the 2-D data in layering face with energy density.By after laser beam flying, the powder of relevant position is just sintered into necessarily
The entity lamella of thickness, the place do not scanned remains in that loose powdered.After this layer scanned, then need under
One layer is scanned.First according to object cut thickness degree be layering thickness and reduce workbench, powdering roller again spreads powder
It is flat, new one layer of scanning can be started.So repeatedly, until scanning through structure at all levels.Remove excessive powder, and through locating later
Reason, you can obtain product.
In existing moulding material field, due to the structure that SLS rapid shaping techniques have raw material sources various with part
Build the time it is shorter the advantages of, therefore have wide application in rapid shaping field.But major part is organic material and composite wood
Material, discloses a kind of nylon powder material for laser sintering and moulding product in Chinese invention patent CN1379061A, pass through
Chemical synthesis and the improvement of technique, the surface to nylon powder material are processed, and it is excellent to have obtained sintering character, moulded products
Intensity is high, the product of good toughness, simplifies the preparation technology of laser sintered nylon material, reduces cost；Chinese invention patent
A kind of laser sintered 3D manufacturing technologies stone plastic composite powder end and preparation method thereof is disclosed in CN103881371.
By carbohydrate gum adhesive coating layer to modified nice foundry sand surface, obtaining precoated sand can directly use laser to the application
Sintering 3D printing shaping.Adhesive need not be sprayed in forming process.Advantage is that adhesive consumption greatly reduces, and reduces environment dirty
Dye, the quality of product is high.Precoated sand adhesive coating prepared by the technique of the application is uniform, and surface is smooth, good fluidity, is adapted to
Laser sintered 3D printing shaping.Additionally, the preparation method that the application is provided is simple, low cost.
The content of the invention
Mesh of the invention is to provide a kind of method for preparing laser sintered 3D printing precoated sand for adhesive with sugar, fast rapid-result
Type precoated sand need not spray binding agent can Direct Laser scanning shaping；
The purpose of the present invention is achieved through the following technical solutions.
A kind of method that laser sintered 3D printing precoated sand is prepared for adhesive with sugar, it is characterised in that the method has
Following processing step：
(1) nice foundry sand pretreatment：After nice foundry sand is cleaned with water, the cetyl three that mass percentage concentration is 5~6% is immersed in
In the aqueous solution of methyl bromide ammonium, room temperature places 48h, and separation of solid and liquid is dried, and obtains pre-processing nice foundry sand；
(2) prepared by laser sintered 3D printing precoated sand：In the reactor, added by mass percentage concentration, water：38%~44%,
White sugar：2%~6%, pre-process nice foundry sand：52%~56%, diethylenetriamines：0.2%~1.0%, polyethylene glycol：
0.2%~2.0%, each component sum is for absolutely, strong stirring, temperature rises to 160~170 DEG C, until moisture evaporation is complete
Finish, 120 mesh sieves are crossed in grinding, obtain laser sintered 3D printing precoated sand.
The particle diameter of the nice foundry sand described in step (1) is in the range of 160~200 mesh.
Nice foundry sand and the solid-to-liquid ratio of the aqueous solution of cetyl trimethylammonium bromide described in step (1) are 1g：5~
In the range of 10mL.
Polyethylene glycol described in step (2) is polyethylene glycol 200 or PEG400.
White sugar described in step (2) is edible soft white sugar or white granulated sugar.
Particle size test method of the present invention is the granularity equivalent diameter size measured using laser particle analyzer.
It is a further object of the present invention to provide the application that laser sintered 3D printing precoated sand is molded on 3D printer, feature
For：Laser sintered 3D printing is molded the confession powder cylinder that laser sintered 3D printing precoated sand is added to selective laser sintering and moulding machine
In, equably be layered on dusty material in processing plane and be heated to processing temperature by powdering roller, and laser sends laser, meter
The switch of calculation machine control laser and the angle of scanner so that laser beam is in processing plane according to corresponding two-dimensional slice shape
Shape is scanned, and after laser beam is inswept, workbench moves down a thickness, then powdering, laser beam flying, so repeatedly, obtains
Laser sintered part；For subregion is scanned, laser power is 80~100W to the mode that wherein laser beam is scanned in processing plane, is swept
Speed is retouched for 1500mm/s, sweep span is 0.1~0.15mm, lift height is 0.10~0.2mm, preheating temperature：100 DEG C,
Processing temperature is 200~210 DEG C.
The present invention compared with the prior art, has the following advantages that and beneficial effect：
(1) the laser sintered 3D printing precoated sand that the present invention is obtained, using sugar as adhesive coating on nice foundry sand surface, green
Environmental protection, it is not necessary to which spraying binding agent can straight forming under the conditions of laser sintered.
(2) the laser sintered 3D printing precoated sand that the present invention is obtained, the uniform particle sizes of particle, sphericity is high, good fluidity
The characteristics of, it is stable in properties；Thin-walled model or small parts can be manufactured by this rapid shaping powder material, product is produced
High with surface gloss, intensity is good, the features such as high precision.
(3) the laser sintered 3D printing precoated sand that the present invention is obtained, with preparation process is simple, condition is easily controllable, raw
Low cost is produced, it is easy to industrialized production, it is easy to store, the advantages of pollution-free.
Specific embodiment
Embodiment 1
(1) nice foundry sand pretreatment：After 100g nice foundry sands are cleaned with water, be immersed in that 800mL mass percentage concentrations are 5% 16
In the aqueous solution of alkyl trimethyl ammonium bromide, room temperature places 48h, and separation of solid and liquid is dried, and obtains pre-processing nice foundry sand；
(2) prepared by laser sintered 3D printing precoated sand：In the reactor, it is separately added into, water：40mL, white sugar：5g, pretreatment is precious
Pearl sand：54g, diethylenetriamines：0.5g, polyethylene glycol：0.5g, strong stirring, temperature rises to 160~170 DEG C, until moisture
Evaporate, grind, cross 120 mesh sieves, obtain laser sintered 3D printing precoated sand.
Embodiment 2
(1) nice foundry sand pretreatment：After 1000g nice foundry sands are cleaned with water, it is 6% to be immersed in 10000mL mass percentage concentrations
In the aqueous solution of cetyl trimethylammonium bromide, room temperature places 48h, and separation of solid and liquid is dried, and obtains pre-processing nice foundry sand；
(2) prepared by laser sintered 3D printing precoated sand：In the reactor, it is separately added into, water：380mL, white sugar：40g, pretreatment
Nice foundry sand：560g, diethylenetriamines：10g, polyethylene glycol：10g, strong stirring, temperature rises to 160~170 DEG C, until water
Divide and evaporate, grind, cross 120 mesh sieves, obtain laser sintered 3D printing precoated sand.
Embodiment 3
(1) nice foundry sand pretreatment：After 1000g nice foundry sands are cleaned with water, it is 5.5% to be immersed in 5000mL mass percentage concentrations
In the aqueous solution of cetyl trimethylammonium bromide, room temperature places 48h, and separation of solid and liquid is dried, and obtains pre-processing nice foundry sand；
(2) prepared by laser sintered 3D printing precoated sand：In the reactor, it is separately added into, water：440mL, white sugar：35g, pretreatment
Nice foundry sand：520g, diethylenetriamines：2g, polyethylene glycol：2g, strong stirring, temperature rises to 160~170 DEG C, until moisture
Evaporate, grind, cross 120 mesh sieves, obtain laser sintered 3D printing precoated sand.
Embodiment 4
(1) nice foundry sand pretreatment：After 2000g nice foundry sands are cleaned with water, it is 5% to be immersed in 14000mL mass percentage concentrations
In the aqueous solution of cetyl trimethylammonium bromide, room temperature places 48h, and separation of solid and liquid is dried, and obtains pre-processing nice foundry sand；
(2) prepared by laser sintered 3D printing precoated sand：In the reactor, it is separately added into, water：420mL, white sugar：20g, pretreatment
Nice foundry sand：550g, diethylenetriamines：8g, polyethylene glycol：8g, strong stirring, temperature rises to 160~170 DEG C, until moisture
Evaporate, grind, cross 120 mesh sieves, obtain laser sintered 3D printing precoated sand.
Embodiment 5
(1) nice foundry sand pretreatment：After 500g nice foundry sands are cleaned with water, be immersed in that 4000mL mass percentage concentrations are 5% ten
In the aqueous solution of six alkyl trimethyl ammonium bromides, room temperature places 48h, and separation of solid and liquid is dried, and obtains pre-processing nice foundry sand；
(2) prepared by laser sintered 3D printing precoated sand：In the reactor, it is separately added into, water：195mL, white sugar：30g, pretreatment
Nice foundry sand：265g, diethylenetriamines：5g, polyethylene glycol：5g, strong stirring, temperature rises to 160~170 DEG C, until moisture
Evaporate, grind, cross 120 mesh sieves, obtain laser sintered 3D printing precoated sand.
Application method：Laser sintered 3D printing precoated sand is added in the confession powder cylinder of selective laser sintering and moulding machine,
Equably be layered on dusty material in processing plane and be heated to processing temperature by powdering roller, and laser sends laser, calculates
The switch of machine control laser and the angle of scanner so that laser beam is in processing plane according to corresponding two-dimensional slice shape
It is scanned, after laser beam is inswept, workbench moves down a thickness, then powdering, laser beam flying, so repeatedly, is swashed
Light sintered part；For subregion is scanned, laser power is 80~100W, scanning to the mode that wherein laser beam is scanned in processing plane
Speed is 1500mm/s, and sweep span is 0.1~0.15mm, and lift height is 0.10~0.2mm, preheating temperature：100 DEG C, plus
Work temperature is 200~210 DEG C.
Claims (5)
1. a kind of method that laser sintered 3D printing precoated sand is prepared for adhesive with sugar, it is characterised in that the method with
Lower processing step：
（1）Nice foundry sand is pre-processed：After nice foundry sand is cleaned with water, the cetyl front three that mass percentage concentration is 5 ~ 6% is immersed in
In the aqueous solution of base ammonium bromide, room temperature places 48h, and separation of solid and liquid is dried, and obtains pre-processing nice foundry sand；
（2）It is prepared by laser sintered 3D printing precoated sand：In the reactor, added by mass percentage concentration, water：38% ~ 44%, in vain
Sugar：2% ~ 6%, pre-process nice foundry sand：52% ~ 56%, diethylenetriamines：0.2% ~ 1.0%, polyethylene glycol：0.2% ~ 2.0%, each group
/ and for absolutely, strong stirring, temperature rises to 160 ~ 170 DEG C, until moisture evaporation is finished, 120 mesh sieves are crossed in grinding,
Obtain laser sintered 3D printing precoated sand.
2. a kind of method that laser sintered 3D printing precoated sand is prepared for adhesive with sugar according to claim 1, its spy
Levy and be, step（1）Described in nice foundry sand particle diameter in the range of 160 ~ 200 mesh.
3. a kind of method that laser sintered 3D printing precoated sand is prepared for adhesive with sugar according to claim 1, its spy
Levy and be, step（1）Described in the solid-to-liquid ratio of the aqueous solution of nice foundry sand and cetyl trimethylammonium bromide be 1g：5~10mL
In the range of.
4. a kind of method that laser sintered 3D printing precoated sand is prepared for adhesive with sugar according to claim 1, its spy
Levy and be, step（2）Described in polyethylene glycol be polyethylene glycol 200 or PEG400.
5. a kind of method that laser sintered 3D printing precoated sand is prepared for adhesive with sugar according to claim 1, its spy
Levy and be, step（2）Described in white sugar be edible soft white sugar or white granulated sugar.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128228.2A CN106926453B (en) | 2017-03-06 | 2017-03-06 | A method of laser sintered 3D printing precoated sand is prepared for adhesive with sugar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128228.2A CN106926453B (en) | 2017-03-06 | 2017-03-06 | A method of laser sintered 3D printing precoated sand is prepared for adhesive with sugar |
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| CN106926453A true CN106926453A (en) | 2017-07-07 |
| CN106926453B CN106926453B (en) | 2019-04-23 |
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| CN201710128228.2A Expired - Fee Related CN106926453B (en) | 2017-03-06 | 2017-03-06 | A method of laser sintered 3D printing precoated sand is prepared for adhesive with sugar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107825706A (en) * | 2017-12-15 | 2018-03-23 | 佛山三维二次方科技有限公司 | The 3D printing technique of thermoplastic macromolecule material |
| CN108296424A (en) * | 2017-09-27 | 2018-07-20 | 柳州市柳晶科技股份有限公司 | A kind of 3D printing precoated sand prepared as adhesive using cellulose |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103272996A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Sand sticking-resistant precoated sand |
| CN104801656A (en) * | 2015-04-01 | 2015-07-29 | 江守仲 | Highly fire-resistant foundry sand for steel casting and preparation method of highly fire-resistant foundry sand |
| CN105195667A (en) * | 2015-09-21 | 2015-12-30 | 济南大学 | Preparation method of 3D printing rapid-prototyping precoated sand |
| CN105492138A (en) * | 2013-08-30 | 2016-04-13 | 旭有机材工业株式会社 | Molding method for laminated mold |
-
2017
- 2017-03-06 CN CN201710128228.2A patent/CN106926453B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272996A (en) * | 2013-04-16 | 2013-09-04 | 繁昌县恒鑫汽车零部件有限公司 | Sand sticking-resistant precoated sand |
| CN105492138A (en) * | 2013-08-30 | 2016-04-13 | 旭有机材工业株式会社 | Molding method for laminated mold |
| CN104801656A (en) * | 2015-04-01 | 2015-07-29 | 江守仲 | Highly fire-resistant foundry sand for steel casting and preparation method of highly fire-resistant foundry sand |
| CN105195667A (en) * | 2015-09-21 | 2015-12-30 | 济南大学 | Preparation method of 3D printing rapid-prototyping precoated sand |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108296424A (en) * | 2017-09-27 | 2018-07-20 | 柳州市柳晶科技股份有限公司 | A kind of 3D printing precoated sand prepared as adhesive using cellulose |
| CN108296424B (en) * | 2017-09-27 | 2020-04-10 | 柳州市柳晶科技股份有限公司 | 3D printing precoated sand prepared by taking cellulose as adhesive |
| CN107825706A (en) * | 2017-12-15 | 2018-03-23 | 佛山三维二次方科技有限公司 | The 3D printing technique of thermoplastic macromolecule material |
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| CN106926453B (en) | 2019-04-23 |
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