超大尺度高分子复合材料3D打印工艺参数研究

Research on 3D Printing Process Parameters of Super Large-scale Polymer Composite Material

为研究超大尺度范围内高分子复合材料3D打印工艺参数,借助自主研发的超大尺度高分子复合材料增减材一体化龙门式打印机进行多次工艺测试,通过单一变量多因素分析法建立数学模型,并利用MATLAB软件进行线性拟合,研究了主要打印参数之间的关系。研究结果表明,单道打印线宽与高流量挤出装置转速成正比,与打印运动机构移动速度成反比;玻璃化温度以上停留时间与材料挤出温度、打印运动机构移动速度、打印速度、环境温度、单位体积储热量成正比,与单层打印时间成反比。玻璃纤维增强ASA工程塑料和碳纤维增强ABS工程塑料打印构件加工温度相近,前层打印起始点温度和玻璃化温度以上停留时间较接近,而玻璃纤维增强尼龙6打印构件加工温度较高,前层打印起始点温度较高,且玻璃化温度以上停留时间较长;玻璃纤维增强ASA工程塑料和碳纤维增强ABS工程塑料打印构件各向弯曲强度较低,且相差较小,而玻璃纤维增强尼龙6打印构件各向弯曲强度较高。

In order to study the 3 D printing process parameters of the super large-scale polymer composite material, with the help of the self-developed super large-scale polymer composite material addition and subtraction gantry 3 D printer. Multiple process tests are carried out, and the mathematical model was established through the single-variable multi-factor analysis method. By using MATLAB software linear is performed fitting and the relationship between the main printing parameters have been studied. The results show that the single-pass printing line width is directly proportional to the speed of the high-flow extrusion device, and inversely proportional to the movement speed of the printing movement mechanism. The residence time above the glass transition temperature is related to the material extrusion temperature, the movement speed of the printing movement mechanism, and the printing output. Ambient temperature and heat storage per unit volume are directly proportional, and inversely proportional to the single-layer printing time. The processing temperature of glass fiber reinforced ASA and carbon fiber reinforced ABS printing components is similar. The printing starting point temperature of the front layer is close to the residence time above the glass transition temperature, while the processing temperature of glass fiber reinforced nylon printing components is higher, and the printing starting point temperature of the front layer is higher. The residence time above the glass transition temperature is longer. Glass fiber-reinforced ASA and carbon fiber-reinforced ABS printing members have lower all-directional bending strength, and the difference is small, while glass fiber-reinforced nylon printing members have higher all-directional bending strength.