Abstract
There has been an increase in demand for free-form building through the development of advanced technologies, and the fourth industrial revolution has become a worldwide trend, thereby changing the construction industry. In particular, in the case of the free-form architecture sector, development of 3D printing technologies has been ongoing for construction automation. According to such trends, this study develops an FCP production equipment using 3D printing technologies. The FCP production equipment in this study is made up of mould equipment and 3D printer. It is different from existing 3D printing technologies so in this study 3D concrete extrusion nozzle must be developed for producing FCP. Basic design suitable to such requirements is proposed. Applicability of the proposed design is checked and the nozzle form is concretized to draft the final drawing. In this study, slit-type opening and closing device for accurate extrusion stoppage of concrete and screw-type nozzle for adjusting pressure and extrusion speed were applied for the nozzle. This is expected to be innovative technology for the FCP production sector.
Highlights
The development of advanced technologies has enhanced design freedom, while resulting in growing demand for free-form construction[1]
There is still a lack of elemental technologies related to free-form building and enormous amounts of capital are being injected for construction
In the case of free-form construction panel (FCP) production, various technologies are being developed, but there are issues such as that moulds cannot be reused for producing panels, while having issues related to time and cost
Summary
The development of advanced technologies has enhanced design freedom, while resulting in growing demand for free-form construction[1]. In the case of free-form construction panel (FCP) production, various technologies are being developed, but there are issues such as that moulds cannot be reused for producing panels, while having issues related to time and cost. Used construction 3D printing technologies form the wall by having the nozzle continuously extrude concrete At this time, the nozzle cannot stop the extruded concrete precisely. When the extrusion outlet is blocked, the concrete left in the nozzle leaks from the gap between the opening and closing device and nozzle caused by pressure This makes it difficult to produce FCP precisely. Circular plate type has a large area for the opening and closing device and so when the nozzle moves, it can destroy the form of unhardened concrete It is inefficient as it must take into consideration the movement of the nozzle for each panel type. Mechanical configuration and cleaning is easy and there is low possibility for flaws
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