Additive Manufacturing (AM) techniques have been applied to many fields. Among them, the Fused Deposition Method (FDM) has been utilized in construction application with concrete paste instead of plastic resin. This paper presents feasibility study of applying Laminated Object Manufacturing (LOM) process especially for freeform architecture. We developed 3D printer of LOM technique equipped with sloped cutting capability. In that way, the surface quality can be improved even with thick laminated sheets. The feasibility of this novel approach was proved through building a freeform bench, and comparing its building time and manufactured freeform surface quality.
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We used a construction method using a CNC milling machine, where free-formed molds were made by cutting EPS (Expanded PolyStyrene) foam with the CNC machine, to build free-formed buildings. CNC milling is off-the-shelf technology that can easily cut EPS foam; however its production cost is too high and the time to manufacture an EPS mold is too long. This paper proposes a novel cutting machine with a fast and cost effective mechanism to manufacture EPS concrete molds. Our machine comprises a cutter and Cartesian coordinate type moving mechanism, where the cutter cuts EPS foam using a hotwire in the shape of ‘Π’ and is capable of adjusting its cutting angle in real-time while keeping its cutting width. We proved through cutting experiments on the CNC machine that cutting time was greatly shortened compared to the conventional method and that the resulting concrete mold satisfied manufacturing precision.
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Development of Side Mold Control Equipment for Producing Free-Form Concrete Panels Jiyeong Yun, Kyeongtae Jeong, Jongyoung Youn, Donghoon Lee Buildings.2021; 11(4): 175. CrossRef
Manufacturing Automation System of Freeform Concrete Formwork Using S-LOM Method Joonhyeok Sim, Hakmin Kim, Kyunwoo Park, Chanwoo Kim, Daehie Hong Journal of the Korean Society for Precision Engineering.2020; 37(1): 43. CrossRef
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