Three-dimensional printer, three-dimensional printing method and preparation method for metal slurry

[0060] A 3D printer is provided in Embodiment 1, please refer to figure 1 , figure 1 It is the structural diagram of the 3D printer in the embodiment of the present application, such as figure 1 As shown, the printer includes:

[0061] bracket 1;

[0062] A printing base plate 2, the printing base plate 2 is arranged on the support 1;

[0063] Injector 3, described injector 3 is arranged on described support 1; Described injector 3 is used for accommodating metal slurry; The outlet of described injector 3 is equipped with nozzle 4; The center line of described nozzle 4 is in line with the printing The bottom plates 2 intersect vertically, and the ejection direction of the nozzle 4 points to the printing bottom plate 2, so that the metal paste can be injected onto the printing bottom plate 2;

[0064] The X-axis stepping motor 5, the Y-axis stepping motor 6, the Z-axis stepping motor 7 and the E-axis stepping motor 8 arranged on the support 1; the X-axis stepping motor 5 and t

[0089] In Embodiment 2, a 3D printing method is provided, and the method is applied to the 3D printer provided in Embodiment 1, such as Figure 5 As shown, the method includes:

[0090] Step S501, receiving the printing control signal carrying the parameters of the model to be printed;

[0091] Step S502, according to the printing control signal, control the rotation direction and rotation speed of the X-axis stepping motor 5, the Y-axis stepping motor 6, and the E-axis stepping motor 8, so as to print the The metal paste is injected onto the printing base plate to complete the printing of the Nth layer model;

[0092] Step S503, according to the printing control signal, control the rotation direction and rotation speed of the Z-axis stepping motor 7, so that the syringe 3 moves a first distance in a direction away from the printing base 2; the first distance is the thickness of each layer model characterized in the parameters;

[0093] Step S504, according to the printing con

[0106] In embodiment three, a method for preparing metal paste is provided, and the metal paste is the printing material of the 3D printer provided in embodiment one, such as Figure 6 As shown, the method includes:

[0107] Step S601, screening raw metal raw materials to obtain metal powders with a size smaller than 300 mesh;

[0108] Step S602, mixing the wax and the metal powder into a mixture;

[0109] Step S603, heating the mixture;

[0110] Step S604, adding stearic acid into the mixture and mixing thoroughly to obtain the metal paste.

[0111] Taking the metal paste as copper paste as an example, the specific preparation method is:

[0112] Since the copper powder often agglomerates, before preparing the copper paste, use a 200-300-mesh sieve to screen the copper powder to prevent the copper powder particles from being too large and blocking the nozzle during printing;

[0113] Then mix wax and copper powder according to the mass ratio of 100:10, and make copper slurry