Preparation method of feed for metal indirect 3D printing and printing method
A 3D printing and metal technology, applied in the field of powder metallurgy, can solve the problems of rare metal microspheres, and achieve the effect of high sphericity, controllable size, and improved density
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[0041] like figure 1 As shown, the present invention is a method for preparing a feed for metal indirect 3D printing, and the preparation method specifically includes the following steps:
[0042] S1) Weigh a certain mass of metal powder and add it to the solvent, and ultrasonically treat it with an ultrasonic cleaner, and the ultrasonic frequency is 50-80KHz to obtain a mixed solution;
[0043] S2) Add dispersant, adhesive and photocuring agent to S1) in turn to obtain a mixed solution, adjust the pH of the solution with a pH adjuster, ultrasonically disperse with magnetic stirring, and the ultrasonic frequency is 50-80KHz to obtain a fluid suspension ;
[0044] S3) using the microfluidic technology to cut the nanofluid suspension into microspherical droplets with silicone oil by using the fluid suspension obtained in S2);
[0045] S4) drop the microspheres obtained in S3) in silicone oil, and irradiate with ultraviolet rays to form a microsphere green body, wash the separa...
Embodiment 1
[0068] S1) Weigh 5 g of nano-copper powder, and disperse the nano-copper powder into 100 mL of anhydrous ethanol with an ultrasonic cleaner.
[0069] S2) Add 1 g of polyvinylpyrrolidone k30 with a mass fraction of 0.5 wt.% to the solution in S1), and adjust the pH of the solution to 10 with NaOH. Add 1.5g of polyoxymethylene, 3wt.% photosensitive resin and photoinitiator (1:1), heat to dissolve, ultrasonically disperse and mix with magnetic stirring for 90min.
[0070] S3) The copper nanofluid suspension prepared in S2) is used as the dispersed phase in the microfluidic technology, and the silicone oil is used as the continuous phase. Disperse phase droplets.
[0071] S4) placing the microsphere droplets obtained in S3) in silicone oil, and irradiating the microsphere droplets in the silicone oil with ultraviolet rays for 30 min to excite the photocuring agent in the microsphere droplets to solidify to form a microsphere blank. The microspheres were washed three times with t...
Embodiment 2
[0075] S1) Weigh 5 g of 6061 aluminum alloy powder, and disperse the 6061 aluminum alloy powder into 100 mL of anhydrous ethanol with an ultrasonic cleaner.
[0076] S2) Add 1 g of polyvinylpyrrolidone k30 with a mass fraction of 0.5 wt.% to the solution in S1), and adjust the pH of the solution to 10 with NaOH.
[0077] Then add 1.3 g of polyoxymethylene, 2.5 wt.% photosensitive resin and photoinitiator (1:1), heat to dissolve, ultrasonically disperse and mix with magnetic stirring for 90 min.
[0078] S3) The aluminum alloy suspension prepared in S2) is used as the dispersed phase in the microfluidic technology, and the silicone oil is used as the continuous phase. The continuous phase with a flow rate of 180 μL / min is set to shear the dispersed phase with a flow rate of 2.5 μL / min. Disperse phase droplets.
[0079] S4) The microsphere droplets obtained in S3) are placed in silicone oil, and the microsphere droplets in the silicone oil are irradiated with ultraviolet rays f...
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