Research on 3D Printing Efficiency of Sand Table Elements Based on FDM

The sand table model made by CNC engraving mechanism has short production cycle and high precision, but it is difficult to express the elements of the sand table for important ground objects. To solve this problem, 3D printing technology was introduced into the production of sand table model. The aim of this paper is to improve the printing efficiency of sand table element model. By designing simple 3D models, the influences of forming angle, infill pattern, support type, layer height, placement mode and other parameters on the molding efficiency of 3D printing were studied. By decomposing the elements of sand table into simple models, the shortest printing time was predicted. The results showed that if the forming Angle was larger, more supports and more layers were printed, the printing efficiency would be lower; The higher the infill density was, the more consumable was needed and the longer the printing time was; There was little difference in the time of making small models between “line” and “grid” infill patterns; The printing path of “circle” infill pattern was long and time consuming. When the forming angle was 0°, placed on sidelong, filled with “line or grid” pattern, supported by “line or pillar” pattern, the printing efficiency was high.