Design of multi-color switching modules based on fused deposition molding 3D printers
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摘要: 传统熔融沉积工艺（FDM）3D打印机只能打印单色或双色模型，为了实现多色彩模型三维实体快速成型，对普通FDM双喷头3D打印机的机械结构以及控制逻辑进行深入研究，设计出了一款支持在任意双喷头3D打印机上安装的3D打印机多色切换模组。实际多色打印测试结果表明，基于该设计方案加工的多色切换模组可以精确、稳定地完成多色彩模型三维实体快速成型。实验表明打印温度为180 ℃ ，采用200 mm/s的打印速度时，产品打印质量较高为FDM多色3D打印提供了新的实现方法。Abstract: Currently, most of the traditional fused deposition molding (FDM) 3D printers can only print monochromatic or dual-color models. To achieve rapid prototyping of multi-color models of 3D objects, a multi-color switching modules that can be installed in any dual sprinkler 3D printer is designed via deeply study the mechanical structures and control logic of traditional FDM 3D printers in this paper. Actual multi-color printing tests show that the multi-color switching module fabricated based on design schemes can accurately and stably complete the rapid prototyping of the multi-color model 3D objects. Experiments show that the printing quality of the products is better under the printing temperature of 180 ℃ and the printing speed of 200 mm/s. This work provides new ideas for FDM multi-color 3D printing.
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Key words:
- FDM /
- dual sprinkler 3D printer /
- multi-color switching modules
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图 3 3D打印机多色切换模组三维图
1—耗材切换手动手柄；2—T8丝杠；3—8 mm光轴；4—耗材挤出电机；5—颜色切换模组主体；6—横移托架；7—摆臂；8—耗材切换电机；9—耗材挤出手动手柄。
表 1 换料分界处粗糙度值
μm 温度/℃ 速度 50 mm/s 100 mm/s 150 mm/s 200 mm/s 180 22.438 24.098 20.971 17.263 200 24.531 33.094 19.183 22.907 220 22.438 39.004 21.540 20.297 
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表 2 平面处粗糙度值
μm 温度/℃ 速度 50 mm/s 100 mm/s 150 mm/s 200 mm/s 180 18.077 17.522 17.130 16.062 200 19.623 23.764 18.907 18.670 220 18.200 22.744 19.985 17.525
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