3DP PRINTING METHOD AND SYSTEM, AND 3DP COMPREHENSIVE PRINTING METHOD

The present invention relates to a 3DP dislocated printing method and system. During layer-by-layer powder laying printing, printing heads are circularly closed and opened along a plurality of spray holes in two sides of the width direction, so that the spray positions of printing areas on adjacent layers corresponding to a same spray hole are mutually staggered. When individual spray holes of the printing heads are blocked, the corresponding positions of the blocked spray holes in the adjacent layers are also mutually staggered, and the problem of interruption of sections of a printing module caused by the phenomenon of missing spray of binders due to the blockage of individual spray holes on a single layer does not occur, thereby improving the 3DP printing efficiency, and reducing maintenance costs of the printing heads. The present invention also relates to a 3DP comprehensive printing method. In the present invention, by means of dislocated printing of the printing heads and by performing printing by again planning a printing track after printing sizes on layers are divided, high-efficiency rapid printing can be achieved, and the defect of printing interruption of sections due to blockage of individual spray holes is avoided, thereby reducing maintenance costs of the printing heads and prolonging the service life of the printing heads.