Dimensionally stable acrylic alloy for 3-d printing
An acrylic, acrylic technology, applied in the direction of 3D object support structure, metal processing equipment, manufacturing tools, etc., can solve problems such as can not be practically used to prepare silk
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Problems solved by technology
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Examples
Embodiment 1
[0086] Example 1 .Method of preparing silk material
[0087] Filabot extruders were used to produce filaments by inputting dry pellets and outputting filaments using a bench-top mini-extruder (screw length approximately 1 foot) Filabot extruder. Filabot has only one adjustable setting (extrusion temperature), using this setting and the air cooling distance (height from extruder to collection box), we were able to adjust the diameter of the filament to the desired filament diameter ( 2.75-2.9mm). Once set, the diameter of the extruded filament will be very uniform, varying within ±0.05mm of the mean. The temperature used in the examples is between 180-210°C. Lower temperatures will cause the extruder screw to stall (torque is too high), while higher temperatures will cause the filaments to stick to each other due to insufficient cooling time / distance. In a more powerful system with stronger torque and cooling lines, the processing window can be increased.
Embodiment 2
[0088] Example 2 .extrusion printing
[0089] The silk was dried overnight and placed in 2 3D printing on a desktop FDM (FFF, material extrusion) machine. Design and slicing are manipulated through the standard 3D software Cura provided by Ultimaker. Unless otherwise stated, all parts here are printed solid, with 0.8mm walls, diagonal cross-fill, 0.2mm per layer thickness, and 0.4mm nozzle diameter. In order to get the best results, the nozzle temperature is set between 230-250°C, the print bed is heated to 75°C, and the printing speed is based on the normal (50mm / s) plus 5-10% of the flow (for increasing the density of the parts ), the fan speed is 50%. No glue or adhesives are required on the glass panels. As the glass plate cools, the extrusion-printed part pops open.
Embodiment 3
[0090] Example 3 .warping test
[0091] A simple test to measure and compare the substrate warpage of various materials on a 3D printing bed (substrate warpage is critical because a part cannot print if it is not attached to the substrate, it is an indication of overall warpage , although overall warpage is more difficult to quantify).
[0092] The test consists of printing thin lines / walls of various lengths (0.8mm thick, two channels of the nozzle) of different materials on a heated glass plate (heated to the Vicat temperature of the material) and then observing, to see which materials and what The length of the part warped / detached from the glass sheet. The measured length is 2cm to 20cm, and the height is about 1cm.
[0093] Each print was then evaluated from the edge showing no warping, occasional warping (some prints warped, others not), minor warping (any detachment from the substrate), moderate warping (a few millimeters away from the substrate) , Large warpage (>...
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Abstract
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