Currently,the mainstream method for direct-writing multi-material 3D printing involves designing a nozzle with multiple inlets to converge into a single outlet,where materials are extruded and organically bond together to achieve a combination of dif-ferent properties.However,multi-material additive manufacturing requires excellent bonding strength between materials,and the material parameters must meet the requirements of high viscosity and shear-thinning characteristics for 3D printing.In order to a-chieve continuous and stable printing of multiple materials,the principle of multi-material coaxial printing and experimental print-ing using a Coaxial Core Multi-material 3D printing(CCM3D)nozzle with a core material that has a rapid switching function was studied.The CCM3D nozzle allows for the stable selective extrusion of core materials with different rheological properties,enabling multi-material coaxial manufacturing.By generating multi-material G-code for printing,the rapid switching between two different viscosity core materials and the printing of 2D patterns are demonstrated.Taking advantage of the benefits of coaxial multi-material printing,silicone with different elastic moduli is selectively embedded into the coaxial core,showcasing its capability to print 3D models.
维普
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