Composition used for fused deposition modeling 3D printing, preparing and application thereof
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A technology of fused deposition modeling and 3D printing, which is applied in applications, 3D object support structures, household components, etc., can solve the problems of high mold opening costs and long development cycles, and achieve less wire drawing, good paving performance, and small warping Effect
Active Publication Date: 2018-07-20
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology
At present, the preparation methods of porous parts are basically concentrated in the traditional manufacturing field, such as supercritical flu
Method used
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Embodiment 1
[0020] A composition for fused deposition modeling 3D printing
[0021] 1) Prepare a 1.75mm wire from Nature Works 4032D PLA on a single-screw extruder, put it in an oven, and dry it at 60°C for 10 hours;
[0022] 2) Put the dried PLA wire into a pressure vessel and heat it at 100°C for 20 minutes;
[0023] 3) Pass CO 2 Gas, keep the pressure in the container at 120bars for 12 hours;
[0024] 4) The pressure vessel is released at a speed of 10 bar / s to obtain polymer wires with micron-sized pores.
Embodiment 2
[0026] A composition for fused deposition modeling 3D printing
[0027] 1) Prepare a 1.75mm wire from Nature Works 3051D PLA on a single-screw extruder, put it in an oven, and dry it at 60°C for 12 hours;
[0028] 2) Put the dried PLA wire into a pressure vessel and heat it at 120°C for 30 minutes;
[0029] 3) Pass CO 2 Gas, keep the pressure in the container at 150bars for 20 hours;
[0030] 4) The pressure vessel is released at a speed of 40 bar / s to obtain polymer wires with micron-sized pores.
Embodiment 3
[0032] A composition for fused deposition modeling 3D printing
[0033] 1) Prepare a 1.75mm wire from Chimei PA-707 on a single-screw extruder, put it in an oven, and dry it at 90°C for 10 hours;
[0034] 2) Put the dried ABS wire into a pressure vessel and heat it at 140°C for 15 minutes;
[0035] 3) Pass CO 2 Gas, keep the pressure in the container at 150bars for 10 hours;
[0036] 4) The pressure vessel is released at a rate of 25 bar / s to obtain polymer wires with micron-sized pores.
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Abstract
The invention relates to a preparing method and application of a composition provided with micron order holes and used for fused deposition modeling 3D printing. Macromolecular material particles aremade into wire rods through a screw extruder, supercritical CO2 fluid above the critical pressure and the critical temperature is adopted, the characteristics that the fluid is high in density, low inviscosity and large in diffusion coefficient are used, the fluid can be immersed into the macromolecular substrate, finally, pressure is relived suddenly, the micron order holes are formed in the macromolecular substrate, the holes range from 0.5 um to 100 um, the composition is adopted to prepare a product with multi-scale holes, holes with two kinds of different scales are achieved, the first kind of holes are formed in the fused deposition modeling printing process, the holes range from 0.1 mm to 1 mm, the other kind of holes are formed through the above composition, and the holes range from 0.1 um to 50 um.
Description
technical field [0001] The present invention relates to a composition based on fused deposition modeling, its preparation and application, in particular to a preparation method and application of a polymer wire with micron-sized holes for fused deposition modeling 3D printing, which belongs to the field of additive manufacturing The field of functional materials. Background technique [0002] In the past two decades, as an emerging technology in the field of rapid prototyping, 3D printing technology has developed very rapidly and has been applied in aerospace, biomedicine, national defense, engineering education, new product development and other fields. 3D printing technology, also known as additive manufacturing technology, is different from the traditional method of removing materials and processing. It directly manufactures products by accumulating materials layer by layer. 3D printing technology uses 3D CAD models to quickly and accurately manufacture complex structura...
Claims
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Application Information
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