| 摘要(英) |
The study is divided into two categories mainly, The first is used in fused deposition modeling of the wire material. The raw material polylactic acid 3D870 is affected greatly by extrusion parameters when it is extruded into a wire. Therefore, parameters must be properly selected to enhance the properties of the final product. In this study, various extrusion parameters were investigated by experiment and statistic, aiming the influence of baking temperature, baking time, extruder temperature, extrusion speed, etc. on the tensile strength of PLA filament. According to the combination parameters of the Taguchi method, it′s selected three-levels and four-factors model design of the L9 orthogonal table, and extrude filament with 9 different factor blend parameters. 5 test pieces are printed for each wire, the test piece specification is ISO-527-5A, a total of 9 groups of 45 test pieces. The test pieces were subjected to tensile tests using an IMADA MX2 Electric tensile test stand. The data produced by the tensile test used the (Design of Experiment) DOE experimental design by the Minitab software, and the data of the tensile strength was input to obtain the maximum signal-to-noise ratio extrusion temperature is 185°C, the extrusion speed is 1195mm per minute, the baking temperature is 50°C, and the baking time is 3 hours combination standard deviation and variance analysis. Because the higher the signal-to-noise ratio, the more robust. It can be seen from the experimental results that the extrusion speed has the greatest influence on the tensile strength of the PLA filament.
The second will cut the original broken test piece and wire into pieces, and the shredded 3D870 uses the optimized parameters to extrude the filament. 5 test pieces were printed out of the three times recycled filament rod and tensile test was carried out on a electric tensile test stand. Comparing the difference between the original filament rod and the three times recycled filament rod in tensile data stress strain and model dimensional accuracy. The experimental results show that the tensile strength of the 3D870 PLA 3D870 wire recycled three times is less than <3% when the optimized parameters are used. It is established that optimizing the wire manufacturing parameters can avoid a large drop in tensile strength. |
| 參考文獻 |
參考文獻
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