Abstract: Disclosed is a three-dimensional printing method for instantly generating a needed molten raw material by way of a resistance heating function during three-dimensional printing. The method can realize three-dimensional printing of material having a high melting point and falls within the technical field of additive manufacturing. The method is characterized by applying a current through a solid raw material and a body to be printed; partially or fully heating the solid raw material located between a guiding device and said body to be printed into a molten state by way of resistance heating; and generating a molten raw material in a space located between the guiding device and the body to be printed.

Abstract: Disclosed is a three-dimensional printing method for instantly generating a needed molten raw material by way of a resistance heating function during three-dimensional printing. The method can realize three-dimensional printing of material having a high melting point and falls within the technical field of additive manufacturing. The method is characterized by applying a current through a solid raw material and a body to be printed; partially or fully heating the solid raw material located between a guiding device and said body to be printed into a molten state by way of resistance heating; and generating a molten raw material in a space located between the guiding device and the body to be printed.

Abstract: A method and apparatus for generating a molten raw material for three-dimensional printing, in which a solid raw material is heated to obtain the molten raw material. The solid raw material is heated to a molten state by electromagnetic induction outside the output end of the guiding device to form a molten segment. The molten segment is supported by the solid raw material and is not in contact with other structures after being in contact with the printed object and/or the support platform.

Abstract: The present invention discloses a droplet generating method for metal three-dimensional printing, and in a process of accumulating a liquid metal or softened flowable metal in a building process through metal three-dimensional printing, a metal flow is fragmentized to form metal droplets; wherein in the process of accumulating the liquid metal or softened flowable metal, a current is applied between the metal flow and a printed metal (7), through a manner of resistance heating, part of the metal flow is heated and gasified to fuse the metal flow, and the metal droplets are formed on the printed metal (7).