CN115537070A - 3D printing material combination and preparation method and application thereof - Google Patents
3D printing material combination and preparation method and application thereof Download PDFInfo
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- CN115537070A CN115537070A CN202211283485.0A CN202211283485A CN115537070A CN 115537070 A CN115537070 A CN 115537070A CN 202211283485 A CN202211283485 A CN 202211283485A CN 115537070 A CN115537070 A CN 115537070A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
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- 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
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
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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
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
Abstract
The invention discloses a 3D printing material combination and a preparation method and application thereof, wherein the 3D printing material combination comprises sintering ink and sintering inhibition ink, the sintering ink comprises an electromagnetic radiation absorbent and an oily ink base material, the sintering inhibition ink comprises a sintering inhibitor, and the sintering inhibitor is a volatile water-soluble compound or water. According to the invention, the oily sintering ink is configured on the oily ink base material and is matched with the water-soluble sintering inhibition ink, when the ink-jet printing head sprays the two inks to the polymer powder bed layer, the contact surfaces of the two inks become well defined due to incompatibility, so that the surface precision and smoothness of the sintered model are higher.
Description
Technical Field
The invention belongs to the field of 3D printing, and particularly relates to a material combination suitable for 3D printing and a preparation method and application thereof.
Background
High Speed Sintering (HSS), which includes Multi Jet Fusion (MJF), is a more advanced one of the 3D printing technologies. The HSS adopts polymer powder as a raw Material, selectively and directly deposits corresponding Radiation Absorbing materials (Radiation Absorbing materials) on the surface of a powder bed polymer through a printing nozzle, and uses infrared light as a heat source to perform surface scanning, so that the scanning time of each layer is greatly shortened, the printing speed is remarkably increased, the printing speed is 10 times of that of the traditional laser powder sintering technology, and the average cost is only half of that of the similar products. Therefore, HSS has the advantages of high productivity and low unit cost, which is a necessary condition for large-scale commercial batch production, but there are few polymer powder raw materials and corresponding radiation absorbing materials currently available in HSS, the surface of a sintered model is also roughened by rapid diffusion of ink containing the radiation absorbing material in the gaps of the polymer powder, printing is strictly controlled to make the temperature of the polymer powder, and the non-sintered area and the area needing sintering of the model need to have obvious temperature difference, so that the polymer material with an unobvious melting point is unfriendly used, and the application of the polymer material is limited.
Disclosure of Invention
In order to solve the technical problems, the invention provides a 3D printing material combination and a preparation method and application thereof, wherein the oil sintering ink and the water-soluble sintering inhibiting ink are matched to generate obvious temperature difference between a model sintering area and a non-sintering area, so that the selection range of polymer powder is expanded; meanwhile, when the oil-based sintering ink and the water-based inhibition ink are sprayed on the polymer powder layer, the contact surfaces of the oil-based sintering ink and the water-based inhibition ink become well defined due to incompatibility, so that the surface precision and the smoothness of a sintered model are higher.
The invention adopts the following technical scheme:
in a first aspect of the present invention, there is provided a 3D printing material combination comprising: the ink comprises sintering ink and sintering inhibition ink, wherein the sintering ink comprises an electromagnetic radiation absorber and an oily ink base material, the sintering inhibition ink comprises a sintering inhibitor, and the sintering inhibitor is a volatile water-soluble compound or water. The oily sintering ink is configured on the oily ink base material and matched with the water-soluble sintering inhibition ink, when the ink-jet printing head sprays the two inks to the polymer powder bed layer, the contact surfaces of the two inks become well defined due to incompatibility, and therefore the sintered model surface has higher precision and smoothness.
Preferably, the sintering ink comprises 40-80 parts of oily ink base material, 5-30 parts of electromagnetic radiation absorber and 0.5-20 parts of performance regulator in parts by weight; the oily ink base material is selected from one or more of liquid paraffin, mineral oil, glycerol, vegetable oil, butyl acetate, methyl ethyl ketone, ethylene glycol ethyl ether and butanol. By optimizing the formula of the sintering ink, the proportion of the electromagnetic radiation absorbent in the sintering ink is improved, and the sintering ink can generate heat under the action of electromagnetic radiation waves, particularly infrared electromagnetic waves, and generate temperature rise of not less than 10 ℃. The sintering area can realize larger temperature rise range, and can reduce the selection difficulty of polymer powder.
More preferably, the sintering ink comprises 70-80 parts of oily ink base material, 10-15 parts of electromagnetic radiation absorbent and 5-15 parts of performance regulator in parts by weight; the effect of sintering the ink within this range is more excellent.
Preferably, the vegetable oil may be palm oil, tung oil, coconut oil, castor oil.
Preferably, the electromagnetic radiation absorber is selected from one or more of carbon black, graphite, carbon nanotubes, infrared absorbing dyes, phthalocyanine dyes, azo dyes, naphthoquinone, anthraquinone, naphthoquinone imine methine dyes, tungsten trioxide, and tin antimony oxide.
Preferably, the performance modifier is selected from one or more of sodium dodecyl sulfate, fatty acid alkyl sulfonate, alpha-sulfo fatty acid methyl ester, higher fatty alcohol sulfate, alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty acid alkyl sulfonate, 2-pyrrolidone, dioctyl phthalate, dibutyl phthalate, water and siloxane surfactant.
Preferably, the sintering inhibiting ink comprises 50-100 parts of sintering inhibitor, 3-30 parts of viscosity regulator and 1-20 parts of surface tension regulator by weight, wherein the sintering inhibitor is selected from one or more of water, ethanol, butanol, butyl acetate, acetone and cyclohexanone. The sintering inhibition ink provided by the invention volatilizes and absorbs heat under the action of electromagnetic radiation waves, particularly infrared electromagnetic waves, and ambient materials and ambient temperature, and generates temperature reduction of not less than 10 ℃.
Preferably, the viscosity regulator is selected from one or more of polyethylene glycol, polypropylene glycol, polyvinylpyrrolidone and associative polyurethane thickening agents.
Preferably, the surface tension regulator is selected from one or more of sodium dodecyl sulfonate, alpha-sulfo fatty acid methyl ester, siloxane surfactant, diisooctyl sulfosuccinate sodium and alkylphenol polyoxyethylene.
In a second aspect of the present invention, a method for preparing the 3D printing material composition is provided, wherein the method comprises the following steps:
mixing an oily ink base material and a performance regulator according to a certain amount, mixing for 5-30min by adopting a high-speed dispersion machine, gradually adding a set amount of electromagnetic radiation absorbent, dispersing for 1-3 hours at a high speed, then transferring into an 80-105Hz ultrasonic dispersion machine for ultrasonic dispersion for 1-3 hours, dispersing for 1-3 hours again by using the high-speed dispersion machine to obtain well dispersed sintering ink, bottling, and sealing for later use;
mixing the sintering inhibitor, the viscosity regulator and the surface tension regulator, dispersing for 30min-2h by using a high-speed dispersion machine to obtain well dispersed sintering inhibition ink, and bottling.
According to the third aspect of the invention, the application of the 3D printing material combination is provided, wherein the polymer powder is preheated in advance, the sintering ink is sprayed into the pattern of the pattern sheet layer to be sintered and formed on the polymer powder bed layer through the ink-jet printing head, the sintering inhibiting ink is sprayed to the edge of the pattern sheet layer to be sintered and formed through the ink-jet printing head, the polymer powder bed layer is irradiated by the electromagnetic radiation source, the primary sheet layer forming of the model is completed, then the powder bed is adjusted to lay the polymer powder again, and the sintering process is repeated until the model is completely formed. The polymer powder can be heated to a state close to but not molten in advance, the sintering ink positioned in the pattern sheet layer pattern absorbs infrared electromagnetic waves to generate heat, the temperature is raised, the polymer powder is fused and sintered or partially fused and sintered, the part of the edge of the pattern sheet layer pattern containing the sintering inhibition ink is cooled and cannot be fused and sintered, the surface smoothness of the model is effectively improved, and meanwhile, the temperature control requirement of a non-sintered area is lowered.
Compared with the prior art, the invention has the following advantages:
1. the oily sintering ink is configured on the oily ink base material and is matched with the water-soluble sintering inhibition ink, when the ink-jet printing head sprays the two inks to the polymer powder bed layer, the contact surfaces of the two inks become well defined due to incompatibility, and the sintering inhibition ink can limit the free penetration of the sintering ink, so that the surface precision and the smoothness of a sintered model are higher.
2. The proportion of the electromagnetic radiation absorbent in the sintering ink is improved through formula optimization, and a sintering area can realize larger temperature rise range; the sintering ink and the sintering inhibition ink are matched, so that the temperature control requirement of a non-sintering area is reduced, the selection difficulty of the polymer powder is effectively reduced by the combined use of the sintering ink and the sintering inhibition ink, and the selection range of the polymer powder is expanded.
3. Water or a volatile water-soluble compound is used as a main component of the sintering inhibition ink, and when the ink meets hot polymer powder, the ink can volatilize and take away heat, so that the temperature of the polymer powder is reduced to ensure that the polymer powder does not reach the sintering or semi-sintering degree, and the sintering size and the area size are effectively controlled; the water or the volatile water-soluble compound is not remained after volatilization, and does not generate negative influence on the polymer powder.
4. The proportion of the electromagnetic radiation absorbent in the sintering ink is effectively improved by selecting a proper electromagnetic radiation absorbent and a proper dispersing agent according to an optimized formula, the quantity of the electromagnetic radiation absorbent contained in the sintering ink in unit quantity is increased, the quantity of heat generated by absorbing electromagnetic radiation is increased, and the temperature rise range under the same condition can be improved, so that the melting temperature of polymer powder is quickly reached, the powder is sintered, the sintering efficiency is improved, and the selection range of the polymer powder is widened.
Detailed Description
In order to facilitate understanding of the technical solutions of the present invention, the following detailed descriptions are given with reference to specific examples. The parts referred to in the following examples are parts by weight.
Example 1
60 parts of palm oil (24-degree palm oil, distributed by the Guangzhou Wanchen chemical industry), 10 parts of butyl acetate (manufactured by the Shandongten Yu chemical industry), 5 parts of sodium dodecyl sulfate, 2 parts of alpha-sulfo fatty acid methyl ester, 0.5 part of an organosilicon antifoaming agent and 7.5 parts of water are mixed and dispersed for 20min by using a high-speed dispersing machine, 5 parts of phthalocyanine dye (K7090 phthalocyanine blue, manufactured by BASF) and 10 parts of carbon black (PRINTEX V type carbon black, manufactured by Orion company) are gradually added, the mixture is continuously dispersed for 1 hour by using the high-speed dispersing machine, the mixture is transferred to an ultrasonic dispersing machine for dispersing for 2 hours, and the mixture is dispersed for 1 hour by using the high-speed dispersing machine again and then bottled to be used as sintering ink.
80 parts of pure water, 15 parts of polyethylene glycol (PEG 400, distributed by New Material Co., ltd. Of Jinn, N.C.), 3 parts of sodium dodecyl sulfate and 2 parts of alpha-sulfo fatty acid methyl ester are added into a high-speed dispersion machine together to be dispersed for 30min, and then the mixture is uniformly mixed and bottled to be used as sintering inhibition ink.
Example 2
70 parts of liquid paraffin (No. 26 liquid paraffin, distributed by Zhengzhou Zhuo trade Co., ltd.), 10 parts of butyl acetate (manufactured by Shandong Chen Yu chemical industry), 3 parts of sodium dodecyl sulfate, 1 part of alpha-sulfo fatty acid methyl ester, 0.5 part of TP300 laureth sulfate TIPA salt (distributed by Guangzhou Diazaoling New Material Co., ltd.), 0.5 part of dioctyl phthalate DOP (distributed by Nanjing Rong chemical Co., ltd.) were mixed and dispersed for 20 minutes by a high-speed dispersing machine, 5 parts of XFS28 carbon nanotubes (distributed by Jiangsu Xiancheng nanometer Material science Co., ltd.), 10 parts of carbon black (PRINTEX V type carbon black, manufactured by Orion Co., ltd.) were gradually added, and the mixture was further dispersed for 1 hour by a high-speed dispersing machine, transferred to an ultrasonic dispersing machine for 2 hours, and again dispersed for 1 hour by a high-speed dispersing machine and then bottled as a sintering ink.
70 parts of pure water, 20 parts of butanol, 6 parts of polyvinylpyrrolidone (PVP-K17, distributed by Qingdao Tuohai iodine products Co., ltd.), 2 parts of sodium dodecyl sulfate, 1 part of dioctyl sodium sulfosuccinate OT-70 (produced by Jiangsu Haian petrochemical company) and 1 part of AEO-9 are added, and the mixture is added into a high-speed dispersion machine together for dispersion for 30min, mixed uniformly and bottled to be used as sintering inhibition ink.
Example 3
50 parts of palm oil (24-degree palm oil distributed by Guangzhou Wanchen chemical industry), 10 parts of butyl acetate (manufactured by Shandongten Yu chemical industry), 10 parts of No. 10 white mineral oil (distributed by Guangzhou Jinbao Biotech Co., ltd.), 5 parts of sodium dodecyl sulfate, 2 parts of sorbitan monooleate SP-80, 0.5 part of an organic silicon defoaming agent and 7.5 parts of water are added, the mixture is dispersed for 20min by using a high-speed dispersion machine after being mixed, 15 parts of anthraquinone dye (Oracet Blue 640 produced by Pasteur) is gradually added, the mixture is continuously dispersed for 1 hour by using the high-speed dispersion machine, the mixture is dispersed for 2 hours by transferring to an ultrasonic dispersion machine, and the mixture is bottled to be used as sintering ink after being dispersed for 1 hour by using the high-speed dispersion machine again.
20 parts of cyclohexanone, 30 parts of butyl acetate, 30 parts of butanol, 14 parts of polypropylene glycol (PVP-K17, distributed by Qingdao Tuohai iodine products Co., ltd.), 3 parts of sodium dodecyl sulfate and 3 parts of dioctyl sodium sulfosuccinate OT-70 (produced by Jiangsu Haian petrochemical company) are added, and the materials are added into a high-speed dispersion machine together for dispersion for 30min, mixed uniformly and bottled to be used as sintering inhibition ink.
Example 4
58 parts of castor oil (Co 40 castor oil, distributed by Guangzhou Fufei chemical industry), 15 parts of glycerol (SUNWAY, limited public distribution of Nanjing Yixin chemical industry), 5 parts of butyl acetate (manufactured by Shandong Chenyu chemical industry), 5 parts of sodium dodecyl sulfate and 2 parts of AEO-20 (lauryl polyoxyethylene ether) are added, the mixture is dispersed for 20min by using a high-speed dispersion machine after mixing, 15 parts of anthraquinone dye Oracet Blue 640 (manufactured by Pasteur) is gradually added, the dispersion is continued for 1 hour by using the high-speed dispersion machine, the mixture is transferred to an ultrasonic dispersion machine for dispersion for 2 hours, the mixture is dispersed for 3 hours by using the high-speed dispersion machine again, and the mixture is bottled to be used as sintering ink.
67 parts of pure water, 20 parts of butanol, 7 parts of polyvinylpyrrolidone (PVP-K17, distributed by Qingdao Tuohai iodine products Co., ltd.), 3 parts of sodium dodecyl sulfate and 3 parts of dioctyl sodium sulfosuccinate OT-70 (produced by Jiangsu Haian petrochemical company) are added into a high-speed dispersion machine for dispersing for 30min, and then the mixture is uniformly mixed and bottled to be used as sintering inhibition ink.
Comparative example 1
50 parts of water, 15 parts of glycerol (SUNWAY, sold by Nanjing alpha-ethylene glycol chemical industry Limited), 5 parts of butanol, 10 parts of polyethylene glycol, 3 parts of sodium dodecyl sulfate and 2 parts of AEO-20 (polyoxyethylene lauryl ether) are added, mixed and dispersed for 20min by using a high-speed dispersion machine, 640 parts of anthraquinone dye Oracet Blue (produced by BASF) are gradually added, the mixture is continuously dispersed for 1 hour by using the high-speed dispersion machine, the mixture is transferred to an ultrasonic dispersion machine for dispersion for 2 hours, and the mixture is bottled to be used as sintering ink after being dispersed for 1 hour by using the high-speed dispersion machine again.
67 parts of pure water, 20 parts of butanol, 7 parts of polyvinylpyrrolidone (PVP-K17, sold by Qingdao Tuohai iodine products Co., ltd.), 3 parts of sodium dodecyl sulfate and 3 parts of dioctyl sulfosuccinate sodium salt OT-70 (produced by Jiangsu Haian petrochemical company) are added into a high-speed dispersion machine together for dispersing for 30min, and then the mixture is uniformly mixed and bottled to be used as sintering inhibition ink.
Comparative example 2
50 parts of liquid paraffin (No. 26 liquid paraffin, distributed by Zhengzhou Zhuo trade Co., ltd.), 10 parts of butyl acetate (manufactured by Shandongten space chemical industry), 10 parts of glycerol (SUNWAY, distributed by Nanjing A-B letter chemical industry Limited), 10 parts of butanol, 3 parts of sodium dodecyl sulfonate and 2 parts of alpha-sulfo fatty acid methyl ester, mixing and dispersing for 20min by using a high-speed dispersing machine, gradually adding 15 parts of carbon black (PRINTEX V type carbon black, manufactured by Orion Co., ltd.), continuously dispersing for 1 hour by using the high-speed dispersing machine, transferring to an ultrasonic dispersing machine for dispersing for 2 hours, dispersing for 1 hour by using the high-speed dispersing machine again, and bottling to be used as sintering ink.
60 parts of glycerol, 30 parts of butanol, 6 parts of polyvinylpyrrolidone (PVP-K17, distributed by Qingdao Tuohai iodine products Co., ltd.), 3 parts of sodium dodecyl sulfate, 1 part of AEO-9, 1 part of OT-70 (produced by Jiangsu Haian petrochemical company), dispersing in a high-speed dispersion machine for 30min, mixing uniformly, and bottling to obtain the sintering inhibition ink.
The sintered inks and the sintering-inhibiting inks configured in examples 1 to 4 and comparative examples 1 to 2 were subjected to performance tests, and the ink performance was evaluated mainly by the following 3 aspects:
1. dispersibility and storage stability, freshly prepared firing ink, and the particle diameter of the electromagnetic radiation absorber dispersed particles were measured using a doppler laser particle sizer (upa 9340 model, manufactured by Microtrac Inc), and the D99 particle diameter and the D50 particle diameter thereof were recorded as evaluation criteria for the dispersion effect thereof. After each sample is stored for 2 months at the temperature of 20-35 ℃, the particle size of the dispersed particles of the electromagnetic radiation absorbent is measured again, and the D99 particle size and the D50 particle size of each sample are compared with the initial particle size of the new configuration to serve as the evaluation standard of the storage stability of each sample. The results are given in the following table:
TABLE 1 particle size of dispersed particles of sintered ink electromagnetic radiation absorber
2. Jetting performance
The method comprises the steps of adopting a Waxjet 410 printer (produced by Zhejiang flash casting three-dimensional science and technology Co., ltd.) and spraying sintering ink after being modified, checking the condition of spraying satellite dots by printing test points, wherein the satellite dots are undesired small dots generated around a main dot, pausing for 1min by continuously and fully spraying for 5 seconds, repeating for 1 hour by pausing for one minute continuously and fully spraying for 5 seconds again, printing the fully-sprayed dots, and checking whether the spraying loss and the missing quantity occur or not. The structure is as follows:
table 2 sintered ink jetting performance test of each example
| Examples | Satellite spot situation | Jet miss condition |
| Example 1 | Satellite-free spot | Jet missing 3 |
| Example 2 | With small satellite spots | Jet missing 2 |
| Example 3 | Severity of satellite spots | Jet missing 8 |
| Example 4 | Satellite-free spot | Jet missing 1 |
| Comparative example 1 | Satellite spot severity | Jet missing 10 |
| Comparative example 2 | Satellite-free spot | Jet missing 3 |
3. Printing performance (sintering ink temperature rise, inhibiting ink temperature drop, model surface)
Irradiating a layer of PA12 powder (PA 12 ultrafine, distributed by Dongbang import and export trade Co., ltd., shenzhen, inc.) with 100 μm thick infrared radiation source for 2 s, and then jetting sintering ink and sintering inhibiting ink according to the slice model data, wherein the jetting amount is 0.02g/cm 2 After spraying, the powder is completely sintered by irradiating the powder for 3 seconds immediately by using an infrared radiation source, the temperature of a sprayed sintering area and an ink inhibiting area is measured immediately, a PA12 powder layer is paved again, 100 layers are repeated in this way, after the powder is naturally cooled to room temperature, the model is taken out, unsintered powder on the surface is brushed off, and the smoothness degree of the surface of the model is observed and compared, and the results are shown in the following table (in the table, a sintering area refers to an area sprayed with sintering ink, and an inhibiting area refers to an area sprayed with sintering inhibiting ink):
table 3 examples print performance test
| Examples | Temperature in the sintering zone | Temperature of inhibition zone | Surface smoothness of the model |
| Example 1 | 170 | 133 | Is smooth and smooth |
| Example 2 | 168 | 151 | Is smoother |
| Example 3 | 170 | 138 | Is smoother |
| Example 4 | 155 | 133 | Smooth and smooth |
| Comparative example 1 | 150 | 135 | Severe roughness |
| Comparative example 2 | 165 | 148 | Roughness of |
As can be seen from the data, the examples 1 to 4 of the present invention can basically meet the printing requirements, and the storage stability of the example 4 is relatively good, mainly because the types and the proportions of the used dispersants are appropriate, and the dispersion time is prolonged; the ejection performance of example 3 was slightly poor, probably because it used a performance modifier, produced surface tension and viscosity, etc. that produced insufficient matching with the ejection head, but other properties were not substantially affected. Comparative examples 1-2 were poor in surface roughness of the mold after completion of sintering, mainly because the contact of the sintering ink with the inhibition ink did not produce a mutual repulsive effect, and the sintering ink might slightly penetrate to the periphery to produce a rough surface; of these, comparative example 1 was inferior in both the ejection property and the storage stability.
The above is only a preferred embodiment of the present invention, and the scope of the present invention is defined by the appended claims, and several modifications and amendments made by those skilled in the art without departing from the spirit and scope of the present invention should be construed as the scope of the present invention.
Claims (9)
- A 3D printed material combination characterized by comprising: the ink comprises sintering ink and sintering inhibition ink, wherein the sintering ink comprises an electromagnetic radiation absorber and an oily ink base material, the sintering inhibition ink comprises a sintering inhibitor, and the sintering inhibitor is a volatile water-soluble compound or water.
- 2. The 3D printed material combination of claim 1, wherein: the sintering ink comprises, by weight, 40-80 parts of an oily ink base material, 5-30 parts of an electromagnetic radiation absorber and 0.5-20 parts of a performance regulator; the oily ink base material is selected from one or more of liquid paraffin, mineral oil, glycerol, vegetable oil, butyl acetate, methyl ethyl ketone, ethylene glycol ethyl ether and butanol.
- 3. 3D printed material combination according to claim 2, characterized in that: the electromagnetic radiation absorbent is selected from one or more of carbon black, graphite, carbon nano tubes, infrared absorption dyes, phthalocyanine dyes, azo dyes, naphthoquinone, anthraquinone, naphthoquinone imine methine dyes, tungsten trioxide and tin antimony oxide.
- 4. 3D printed material combination according to claim 2, characterized in that: the performance regulator is selected from one or more of sodium dodecyl sulfate, fatty acid sulfoalkyl ester, alpha-sulfofatty acid methyl ester, high-carbon fatty alcohol sulfate, alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty acid sulfoalkyl ester, 2-pyrrolidone, dioctyl phthalate, dibutyl phthalate, water and siloxane surfactant.
- 5. The 3D printed material combination of claim 1, wherein: the sintering inhibition ink comprises, by weight, 50-100 parts of a sintering inhibitor, 3-30 parts of a viscosity regulator and 0.5-20 parts of a surface Zhang Diaojie agent, wherein the sintering inhibitor is selected from one or more of water, ethanol, butanol, butyl acetate, acetone and cyclohexanone.
- 6. The 3D printed material combination of claim 5, wherein: the viscosity regulator is selected from one or more of polyethylene glycol, polypropylene glycol, polyvinylpyrrolidone and associative polyurethane thickening agent.
- 7. The 3D printed material combination of claim 5, wherein: the surface tension regulator is selected from one or more of sodium dodecyl sulfate, alpha-sulfo fatty acid methyl ester, siloxane surfactant, sodium diisooctyl succinate sulfonate and alkylphenol polyoxyethylene.
- 8. Method for the preparation of a 3D printing material combination according to any of the claims 1 to 7, characterized in that the method for the preparation comprises the steps of:mixing an oily ink base material and a performance regulator according to a certain amount, mixing for 5-30min by adopting a high-speed dispersion machine, gradually adding a set amount of electromagnetic radiation absorbent, dispersing for 1-3 hours at a high speed, then transferring into an 80-105Hz ultrasonic dispersion machine for ultrasonic dispersion for 1-3 hours, dispersing for 1-3 hours again by using the high-speed dispersion machine to obtain well dispersed sintering ink, bottling, and sealing for later use;mixing the sintering inhibitor, the viscosity regulator and the surface tension regulator, dispersing for 30min-2h by using a high-speed dispersion machine to obtain well dispersed sintering inhibition ink, and bottling.
- 9. Use of a combination of 3D printed materials according to any of claims 1 to 7, characterized in that: preheating polymer powder in advance, spraying sintering ink into the pattern sheet layer pattern to be sintered and molded of a polymer powder bed layer through an ink-jet printing head, spraying sintering inhibition ink to the edge of the pattern sheet layer pattern to be sintered and molded through the ink-jet printing head, irradiating the polymer powder bed layer with an electromagnetic radiation source to complete one-time sheet layer molding of a model, then adjusting the powder bed to re-lay the polymer powder, and repeating the sintering process until the model is completely molded.
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| CN113211593A (en) * | 2021-05-24 | 2021-08-06 | 王祥宇 | Additive manufacturing method for powder printing, sintering and laser composite processing |
| CN113874417A (en) * | 2019-07-15 | 2021-12-31 | 惠普发展公司，有限责任合伙企业 | Three-dimensional printing |
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