机械各向同性材料挤出印刷的方法.pdf

1、Approach for Mechanical Isotropic Material Extrusion PrintingVerena Witt verena.wittaim3d.deIntroduction Verena Witt2020 B.Sc.in Biomedical Engineering 2023 M.Sc.in Mechanical Engineering Joined New AIM3D as a process engineer in 2023 Develops and optimizes the Voxelfill method Technology:CEM-proces

2、s All in oneStandard injection molding pelletsIndustrial 3D printingSoftware and Process OptimizationThe Problem of Anisotropy in Additive ManufacturingExtrusion based AM today Loss of strength in printing direction Part breaks along the layers due to weak adhesion Technology often limited to protot

3、ypesPrinting directionHardware optimization is limited Software developement Voxelfill Combination of material extrusion printing and injection moulding to get isotropic behaviorzxyVoxel geometry Room filling orientationImplementation in a slicing softwareVoxelfill ProcessVoxelfill Combination of ma

4、terial extrusion printing and injection moulding to get isotropic behaviorzxyVoxel geometry Room filling orientationImplementation in a slicing softwareproof of concept neededResearch Overview Step 1:Choose material and test method Step 2:Fabricate test samples Step 3:Characterize samples Step 4:Dis

5、cuss anisotropic behaviorAIM3DstrainstrengthMaterial and Methods:Choose Material and Test MethodMaterial PETG with 30%glassfiber from Polymaker(PETG-1013)Printed conventionally layer by layer Printed with VoxelfillTest Method Density measurements(Archimedes)Tensile strength tests(ISO 527)x-direction

6、 z-direction Confocal microscopy ParameterTesting methodValueDensity g/cm3at 21.5 CASTM D792 1.39Glass transitiontemperature CDSC,10 C/min81Material and Methods:Fabricate Test Samples Printing of samples was done on ExAM255 machine from NEW AIM3D Parameters for printing conventionally were searched