Method of manufacturing a structure

Abstract

To provide a structure production method capable of easily providing cavities with a desired shape and attaining the lightening of a structure.SOLUTION: A structure production method has a process of laminating hydraulic mixtures 3 discharged in an additional production device to produce a structure 1 partially having holes 2 (cavities) free from the hydraulic mixtures 3, and has: a hydraulic mixture discharge step of discharging the hydraulic mixtures 3 to regions other than regions to be the hole parts 2; a granular material fill step of filling a granular material into the regions to be the hole parts 2; and a granular material removal step of removing the granular material. In the hydraulic mixture discharge step, each hydraulic mixture 3 is discharge so as to be overlapped on the already discharged each hydraulic mixture 3 or the already filled granular material, in the granular material fill step, the granular material is filled so as to be overlapped on the already discharged each hydraulic mixture 3 or the already filled granular material, and the granular material removal step is executed after the completion of the hydraulic mixture discharge step and the granular material fill step.SELECTED DRAWING: Figure 1

Claims

1. A method for manufacturing a structure, comprising stacking hydraulic mixtures extruded by an additive manufacturing apparatus to produce a structure having voids where the hydraulic mixture is partially absent, A hydraulic mixture discharge step in which the hydraulic mixture is discharged into a region other than the region that becomes the void, A granular material filling step in which granular material is filled into the aforementioned void region, The process includes a granular material removal step for removing the aforementioned granular material, In the hydraulic mixture discharge step, the hydraulic mixture is discharged on top of the hydraulic mixture that has already been discharged or the granular material that has already been filled. In the granular material filling step, the granular material is filled on top of the hydraulic mixture that has already been discharged or the granular material that has already been filled. A method for manufacturing a structure, wherein the granular material removal step is performed after the hydraulic mixture discharge step and the granular material filling step are completed.

2. In the granular material filling step, sand is used as the granular material. The method for manufacturing a structure according to claim 1, wherein in the granular material removal step, the sand is washed away and removed with water.

3. In the hydraulic mixture discharge step, the hydraulic mixture is discharged while moving the nozzle that discharges the hydraulic mixture from the additive manufacturing apparatus. A method for manufacturing a structure according to claim 1 or 2, wherein in the granular material filling step, a granular material dispensing device is provided near the nozzle and is movable together with the nozzle to dispense the granular material, and the granular material is used to fill the region that will become a void with the granular material.

4. A method for manufacturing a structure, comprising stacking hydraulic mixtures extruded by an additive manufacturing apparatus to produce a structure having voids where the hydraulic mixture is partially absent, A hydraulic mixture discharge step in which the hydraulic mixture is discharged into a region other than the region that becomes the void, The process includes a step of filling the void region with an intervening material made of a material lighter than the hydraulic mixture, In the hydraulic mixture discharge step, the hydraulic mixture is discharged on top of the hydraulic mixture that has already been discharged or the intervening material that has already been filled. In the intervening material filling step, the intervening material is filled on top of the hydraulic mixture that has already been discharged or the intervening material that has already been filled. A method for manufacturing a structure in which the interposing material is a resin foam, paper, or biodegradable plastic.

5. In the hydraulic mixture discharge step, the hydraulic mixture is discharged while moving the nozzle that discharges the hydraulic mixture from the additive manufacturing apparatus. The method for manufacturing a structure according to claim 4, wherein in the intermediate material filling step, an intermediate material dispensing device is provided near the nozzle and is movable together with the nozzle to dispense the intermediate material, thereby filling the region that will become the void with the intermediate material.

6. A method for manufacturing a structure according to any one of claims 1 to 5, wherein in the hydraulic mixture discharge step, the hydraulic mixture is discharged in a direction intersecting the direction in which the hydraulic mixture already provided was discharged.

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