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"The source of the forces on the spine in the lumbar region is one of the key questions in the intervertebral disc biomechanics. Using Scanning Electron Microscope and X-ray diffraction methods, the surface texture of the HA and coated disc were determined to determine the morphology and phase structure of the surface. In the mechanical simulation of the component, the component's mechanical results of three samples with a metal layer without a metal layer and a metal layer coated with HA nanoparticles were used. Using Finite Element Method Methods since the success of using an artificial disk depends on maintaining the mechanical characteristics of the intervertebral disc, it is useful to investigate the artificial disk's behavior under various loads. For the two parts of the nucleus and the annulus, Then, the elastic modulus, and the ideal Poisson ratio were used for the two parts of the nucleus and annulus.
Source link: https://doi.org/10.1016/j.polymertesting.2022.107633
"We wrote this article about a large-scale hybrid manufacturing equipment of the three-dimensional printer based on fused deposition modeling and CNC machining integrated with CNC machining. " u00d7 1,200 mm with an extruder with an extrusion rate of 30 mm u00b7s/u22121 and a nozzle area of 15 mm2 mm2. Our hybrid manufacturing system can be widely used to produce various shapes of large-scale molds as a cost-effective alternative to conventional methods in the production process, according to our estimates.
Source link: https://doi.org/10.1515/htmp-2022-0018
"Three-dimensional printers mainly produce 3D objects by stacking thin layers of paper. " The impact of the tools made using the fused deposition modeling 3D printer on nerve cells is unclear. The effects of polytetrafluoroethylene models and two specific types of polylactic acid models were compared using the Campenot chamber in this research. The axon extensions were identified on day 7, the culture's introduction, but the side compartments of each group's side compartments were revealed. According to a newspaper "the PLA was associated with a shorter axon extension than the PTFE. ".
Source link: https://doi.org/10.1515/biol-2022-0031
"3D printers' gyn-phase emissions have received brisk reviews in terms of their health risk. " We here describe the emergence of gaseous emissions from polymer filaments. Analyzing gases released from various types of 3D filaments was carried out using commercially available materials. To produce gaseous emissions, the thermal decomposition of material in an air stream device was used. In addition, it was discovered that the composition of filaments and the time dependence of gas-phase emissions varied according to the composition of filaments.
Source link: https://doi.org/10.3303/CET2290093
"The direct fabrication of micromodels with a 3D printer can expedite the manufacturing process and reduce the cost. " A stereolithography 3D printer is one of the best options because it has sufficient printing capabilities for micromodel manufacturing and is relatively inexpensive. We investigated the capability of an SLA 3D printer for micromodel fabrication in this article. Using microtomography for the first time, various parameters that influence the printing results, such as the effects of geometries, dimensions, printing axis configurations, printing thickness resolutions, and pattern thicknesses, were investigated.
Source link: https://doi.org/10.3390/geosciences12050183
"Kollicoat_u00ae IR and an infrared laser-absorbing dye were chemically mixed in different amounts and exposed to SLS-mediated sintering to produce 3D printlets by a set printing temperature and a set laser power ratio. The desired percentage of dye was initially determined based on its sintering results, but the same amount was used to sinter the physical mixtures at various feed bed temperatures and print bed temperature, retaining the laser power ratio constant. It was found that good sintering results was correlated with a feed bed temperature of 130 ° u00b0C and a print bed temperature of 150 °u00b0C. An IR/red diode laser with a wavelength of 808 nm and a maximum power ratio of 1. 0 is appropriate for sintering 3D printlets, depending on the conditions.
Source link: https://doi.org/10.1016/j.stlm.2022.100054
"Always in the early stages of the 3D printer development process, once it is determined to use the Cartesian kinematics, it is always necessary to find relative positions of axes and linear drives, which would be appropriate for the particular model. This paper presents a method for estimating Cartesian 3D printers' natural frequencies based on the kinematic scheme, using the Euleru2013Lagrange formalism.
Source link: https://doi.org/10.3390/app12094514
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