首页|Patent Issued for System for additively manufacturing composite structure (USPTO 11958245)
Patent Issued for System for additively manufacturing composite structure (USPTO 11958245)
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NSTL
News editors obtained the following quote from the background information suppli ed by the inventors:“Continuous fiber 3D printing (a.k.a., CF3D®) involves the use of continuous fibers embedded within amatrix discharging from a moveable pr int head. The matrix can be a traditional thermoplastic, a powderedmetal, a liq uid resin (e.g., a UV curable and/or two-part resin), or a combination of any of these andother known matrixes. Upon exiting the print head, a head-mounted cur e enhancer (e.g., a UV light, anultrasonic emitter, a heat source, a catalyst s upply, etc.) is activated to initiate and/or complete curing ofthe matrix. This curing occurs almost immediately, allowing for unsupported structures to be fab ricatedin free space. When fibers, particularly continuous fibers, are embedded within the structure, a strengthof the structure may be multiplied beyond the matrix-dependent strength. An example of this technologyis disclosed in U.S. Pa t. No. 9,511,543 that issued to Tyler on Dec. 6, 2016 (“the ‘543 patent”).“Placement accuracy in the material discharged from an additive manufacturing pr int head can beimportant. In some additive manufacturing systems, the print hea d is mounted to the end of a roboticarm, allowing for larger structures to be f abricated within the overall reach of the arm. Typical robotarms, however, can produce inaccurate movements due to gaps between moving components (a.k.a., static lash associated with gears) and/or due to flexing of components at higher spe eds (a.k.a., dynamic lashassociated with bending of the arm).
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