CN104150915A - Powder 3D printing method based on water-based inorganic binder - Google Patents
Powder 3D printing method based on water-based inorganic binder Download PDFInfo
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- CN104150915A CN104150915A CN201410384306.1A CN201410384306A CN104150915A CN 104150915 A CN104150915 A CN 104150915A CN 201410384306 A CN201410384306 A CN 201410384306A CN 104150915 A CN104150915 A CN 104150915A
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Abstract
The invention discloses a powder 3D printing method based on a water-based inorganic binder. The powder 3D printing method comprises the following steps: firstly, using deionized water as a binder solvent, adding a chloride salt as a binder component, adding a co-volatile agent, a coloring agent and a modifying agent, and mixing to form an aqueous inorganic salt solution as a binder for a powder 3D printer; secondly, using inorganic oxide powder corresponding to the used chloride as a reactive material, mixing the solid binder with 3D printer raw material powder, and then adding flux to form mixed powder as a material for the powder 3D printing; finally, performing the powder 3D printing by using the binder and the mixed powder. By the powder 3D printing method, rapid powder 3D printing of a product with complex structure is achieved, and the environment friendliness of the manufacturing process is ensured, the production cost is reduced and the product quality is improved.
Description
Technical field
The present invention relates to powder 3D printing technique field, be specifically related to a kind of powder 3D Method of printing based on water-based inorganic binding agent.
Background technology
It is a kind of 3D Method of printing that utilizes droplet ejection, powder bonded technology that powder 3D prints (3DP).Shower nozzle is under computer control, and according to the information of current minute layer cross section, on one deck powdered material of completing in advance, jet binder, makes part powder bonded selectively, forms one deck cross section thin layers; After one deck has been shaped, the worktable bed thickness that declines, carries out the paving powder of lower one deck, constituency jet binder then, and shaping thin layer also can stick to one with formation of parts simultaneously; Continuous this process of circulation, until part processes; Conventionally the part of formed thereby also needs certain aftertreatment, as dry, sintering etc., thereby obtains last part.
In powder 3D prints technological process, its stable performance of binding agent that general requirement is sprayed for printhead, can standing storage, to the corrosion-free effect of shower nozzle, viscosity is low and surface tension is suitable etc.Conventionally, the liquid-containing binder that can adopt can be divided into this three types: one, itself does not neither play the liquid of cohesive action with powdered reaction yet, as chloroform, ethanol etc., they only play as powder mutually combines the effect of medium are provided, itself after Mold Making is complete, can evaporate into remaining any material hardly, the powder that just can harden by autoreaction for itself is applicable; Two, itself can and itself have the liquid of part cohesive action with the liquid of powdered reaction, as current comparatively conventional organic binder bond, they are by liquid-soaked and connect powder, then partially liq volatilization, the remaining binding agent with cohesive action can mutually combine powder, wherein, addible adhesion component comprises butyral resin, polyvinyl chloride, Polycarbosilane, polyvinylpyrrolidone and some other macromolecule resins etc.; Three, binding agent itself can with powder between can react, the powder that aluminum oxide is main component as take, can solidify by the injection reaction of acid binding agent, conventionally for metal-powder, is usually in binding agent, to add some metal-salts to bring out its reaction.
Yet described in above content, conventional powder 3D prints technique and adopts organic binder bond system more, and mainly there is the shortcoming of following two aspects in this binder system:
1) organic matter binding agent stability is bad, after being subject to ectocine, apt to deteriorate, and or not with storage, meanwhile, organic binder bond does not easily corrode transport pipe and the printing head of binding agent yet, easily causes the obstruction of shower nozzle;
2) powder 3D prints resulting part and conventionally need to carry out the aftertreatments such as degreasing, calcining, but, because traditional organic matter binding agent is unstable at high temperature performance, easily decompose, do not reach bond effect, and may discharge toxic gas, and make powder 3D print produced part after degreasing, calcining, be difficult to obtain higher density and intensity.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of powder 3D Method of printing based on water-based inorganic binding agent, guaranteed the feature of environmental protection of manufacturing processed, reduced production cost, improved quality product.
In order to achieve the above object, the present invention adopts following technical scheme:
A powder 3D Method of printing based on water-based inorganic binding agent, comprises the following steps:
1) adopting 35-50 part deionized water is binding agent solvent, add 50-65 part chloride salt as binder component, adding 0-50 part helps volatilizer to improve the rate of drying of binding agent, add 0-5 part tinting material and carry out the painted of binding agent, add 0-5 part properties-correcting agent to carry out the modification of binding agent, the inorganic salt solution being mixed to form is as the binding agent of powder 3D printer, first reactant of bonding reaction using this inorganic salt solution as binding agent;
2) adopt and step 1) the corresponding inorganic salt oxide powder of muriate used is as reaction material, adopt 15-30 part magnesium oxide (MgO) or 15-30 part zinc oxide (ZnO) as the second reactant, the second reactant mixes with 70-85 part 3D printer raw material powder, add again 0-10 part fusing assistant to carry out the adjusting of powder property, the material that above formed mixed powder is printed as powder 3D;
3) adopt 20-40 part step 1) binding agent and 60-80 part step 2 of preparation) mixed powder prepared carries out powder 3D printing, after printing completes, preservation is printed part and is carried out seasoning in powder 3D printer, or is sent in heated drying case or microwave drying oven and is dried; After being dried, remove not bond powders, directly obtain mineral binder bond bonding ceramic part;
4) according to material, form needs, carry out high temperature sintering, obtain high strength part;
Described umber is mass fraction.
Described chloride salt is magnesium chloride (MgCl
2) or zinc chloride (ZnCl
2) concentration be 5%～70% aqueous solution.
The described volatilizer that helps is alcohol, acetone or methyl alcohol.
Described tinting material is organic ink or inorganic ink.
Described properties-correcting agent is thickening material, surface-modifying agent or dispersion agent.
Described raw material powder is the powder of pottery, diatomite, sand or gypsum.
Described fusing assistant is calcium oxide (CaO), potassium oxide (K
2o), sodium oxide (Na
2o), plumbous oxide (PbO) or boron oxide (B
2o
3).
Advantage of the present invention is to adopt the water-based inorganic binder system that chloride soln forms with corresponding oxide powder as powder 3D, to print the binding agent of technique, this binder system, for the unstable of organic matter binding agent, its stable performance, is easier to preserve; Simultaneously, mineral binder bond based on water base, its viscosity is low, be difficult for stopping up shower nozzle, to the corrosion-free effect of shower nozzle, can obtain more suitable surface tension, thereby can realize the powder 3D printing manufacture fast with complex construction goods, also the feature of environmental protection that has guaranteed manufacturing processed, has reduced production cost, has improved quality product.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1
A powder 3D Method of printing based on water-based inorganic binding agent, comprises the following steps:
1) adopting 35 parts of deionized waters is binding agent solvent, adds 64 parts of magnesium chloride (MgCl
2) 40% aqueous solution is as binder component, add 1 part of alcohol as helping volatilizer to improve the rate of drying of binding agent, do not add tinting material and carry out the painted of binding agent, do not add the modification that properties-correcting agent carries out binding agent yet, the inorganic salt solution being mixed to form is as the binding agent of powder 3D printer, first reactant of bonding reaction using this inorganic salt solution as binding agent;
2) adopt and step 1) the corresponding inorganic salt oxide powder of muriate used is as reaction material, adopt 15 parts of magnesium oxide (MgO) as the second reactant, the second reactant mixes with the ceramic powder of 85 parts of 3D printers, do not add the adjusting that fusing assistant carries out powder property, the material that above formed mixed powder is printed as powder 3D;
3) adopt 40 parts of steps 1) binding agent and 60 parts of steps 2 of preparation) mixed powder prepared carries out powder 3D printing, after printing completes, preservation is printed part and is carried out seasoning in powder 3D printer, or is sent in heated drying case or microwave drying oven and is dried; After being dried, remove not bond powders, can directly obtain mineral binder bond bonding ceramic part;
4) according to material, form needs, carry out high temperature sintering, obtain high strength part, described umber is mass fraction.
The liquid-containing binder solution that adopts embodiment 1 scheme to obtain, at room temperature, its viscosity <2 * 10
-3pas, viscosity is lower, the binding agent cohesive strength >0.8MPa that magnesium chloride inorganic salt magnesium oxide corresponding thereto forms, bond effect is good, can meet well the colored 3D of powder and print requirement.
Embodiment 2
A powder 3D Method of printing based on water-based inorganic binding agent, comprises the following steps:
1) adopting 35 parts of deionized waters is binding agent solvent, adds 64 parts of zinc chloride (ZnCl
2) 40% aqueous solution is as binder component, add 1 part of alcohol as helping volatilizer to improve the rate of drying of binding agent, do not add tinting material and carry out the painted of binding agent, do not add the modification that properties-correcting agent carries out binding agent yet, the inorganic salt solution being mixed to form is as the binding agent of powder 3D printer, first reactant of bonding reaction using this inorganic salt solution as binding agent;
2) adopt and step 1) the corresponding inorganic salt oxide powder of muriate used is as reaction material, adopt 30 parts of zinc oxide (ZnO) as the second reactant, the second reactant mixes with the diatomite powder of 70 parts of 3D printers, do not add the adjusting that fusing assistant carries out powder property, the material that above formed mixed powder is printed as powder 3D;
3) adopt 40 parts of steps 1) binding agent and 60 parts of steps 2 of preparation) mixed powder prepared carries out powder 3D printing, after printing completes, preservation is printed part and is carried out seasoning in powder 3D printer, or is sent in heated drying case or microwave drying oven and is dried; After being dried, remove not bond powders, can directly obtain mineral binder bond bonding ceramic part;
4) according to material, form needs, carry out high temperature sintering, obtain high strength part, described umber is mass fraction.
The liquid-containing binder solution that adopts embodiment 2 schemes to obtain, at room temperature, its viscosity <2 * 10
-3pas, viscosity is lower, the binding agent cohesive strength >0.8MPa that zinc chloride inorganic salt zinc oxide corresponding thereto forms, bond effect is good, can meet well the colored 3D of powder and print requirement.
Embodiment 3
A powder 3D Method of printing based on water-based inorganic binding agent, comprises the following steps:
1) adopting 45 parts of deionized waters is binding agent solvent, adds 50 parts of zinc chloride (ZnCl
2) 40% aqueous solution is as binder component, add 1 part of alcohol as helping volatilizer to improve the rate of drying of binding agent, add 3 parts of inorganic inks and carry out the painted of binding agent as tinting material, add 1 part of thickening material and as properties-correcting agent, carry out the modification of binding agent, the inorganic salt solution being mixed to form is as the binding agent of powder 3D printer, first reactant of bonding reaction using this inorganic salt solution as binding agent;
2) adopt and step 1) the corresponding inorganic salt oxide powder of muriate used is as reaction material, adopt 30 parts of zinc oxide (ZnO) as the second reactant, the second reactant mixes with the sand powder of 65 parts of 3D printers, add 5 parts of calcium oxide (CaO) and as fusing assistant, carry out the adjusting of powder property, the material that above formed mixed powder is printed as powder 3D;
3) adopt 40 parts of steps 1) binding agent and 60 parts of steps 2 of preparation) mixed powder prepared carries out powder 3D printing, after printing completes, preservation is printed part and is carried out seasoning in powder 3D printer, or is sent in heated drying case or microwave drying oven and is dried; After being dried, remove not bond powders, can directly obtain mineral binder bond bonding ceramic part;
4) according to material, form needs, carry out high temperature sintering, obtain high strength part, described umber is mass fraction.
The liquid-containing binder solution that adopts embodiment 3 schemes to obtain, at room temperature, its viscosity <1.5 * 10
-3pas, viscosity is near pure water; The binding agent cohesive strength >0.5MPa that zinc chloride inorganic salt zinc oxide corresponding thereto forms, bond effect is better; Added tinting material, increased color, can realize the colored 3D of powder and print; Add and help volatilizer, volatilization effect is better, has increased bond effect; Added fusing assistant, can reduce part in the temperature of aftertreatment high temperature sintering, can meet well the colored 3D of powder and print requirement.
Claims (7)
1. the powder 3D Method of printing based on water-based inorganic binding agent, is characterized in that, comprises the following steps:
1) adopting 35-50 part deionized water is binding agent solvent, add 50-65 part chloride salt as binder component, adding 0-50 part helps volatilizer to improve the rate of drying of binding agent, add 0-5 part tinting material and carry out the painted of binding agent, add 0-5 part properties-correcting agent to carry out the modification of binding agent, the inorganic salt solution being mixed to form is as the binding agent of powder 3D printer, first reactant of bonding reaction using this inorganic salt solution as binding agent;
2) adopt and step 1) the corresponding inorganic salt oxide powder of muriate used is as reaction material, adopt 15-30 part magnesium oxide (MgO) or 15-30 part zinc oxide (ZnO) as the second reactant, the second reactant mixes with 70-85 part 3D printer raw material powder, add again 0-10 part fusing assistant to carry out the adjusting of powder property, the material that above formed mixed powder is printed as powder 3D;
3) adopt 20-40 part step 1) binding agent and 60-80 part step 2 of preparation) mixed powder prepared carries out powder 3D printing, after printing completes, preservation is printed part and is carried out seasoning in powder 3D printer, or is sent in heated drying case or microwave drying oven and is dried; After being dried, remove not bond powders, directly obtain mineral binder bond bonding ceramic part;
4) according to material, form needs, carry out high temperature sintering, obtain high strength part;
Described umber is mass fraction.
2. a kind of powder 3D Method of printing based on water-based inorganic binding agent according to claim 1, is characterized in that: described chloride salt is magnesium chloride (MgCl
2) or zinc chloride (ZnCl
2) concentration be 5%～70% aqueous solution.
3. a kind of powder 3D Method of printing based on water-based inorganic binding agent according to claim 1, is characterized in that: the described volatilizer that helps is alcohol, acetone or methyl alcohol.
4. a kind of powder 3D Method of printing based on water-based inorganic binding agent according to claim 1, is characterized in that: described tinting material is organic ink or inorganic ink.
5. a kind of powder 3D Method of printing based on water-based inorganic binding agent according to claim 1, is characterized in that: described properties-correcting agent is thickening material, surface-modifying agent or dispersion agent.
6. a kind of powder 3D Method of printing based on water-based inorganic binding agent according to claim 1, is characterized in that: described raw material powder is the powder of pottery, diatomite, sand or gypsum.
7. a kind of powder 3D Method of printing based on water-based inorganic binding agent according to claim 1, is characterized in that: described fusing assistant is calcium oxide (CaO), potassium oxide (K
2o), sodium oxide (Na
2o), plumbous oxide (PbO) or boron oxide (B
2o
3).
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| CN201410384306.1A CN104150915B (en) | 2014-08-06 | 2014-08-06 | A kind of powder 3D Method of printing based on water-based inorganic binding agent |
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| CN104446394A (en) * | 2014-12-01 | 2015-03-25 | 青岛麦特瑞欧新材料技术有限公司 | Chromium-doped inorganic nanocomposite material for 3D printing and preparation method of chromium-doped inorganic nanocomposite material |
| CN104923717A (en) * | 2015-06-04 | 2015-09-23 | 宁夏共享化工有限公司 | Inorganic binder for nonferrous metal 3D sand mould printing and preparation method thereof |
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