打印方式对熔融沉积成型制品性能的影响

发布时间：2018-07-28 17:41

【摘要】：通过挤出成型制备了可用于熔融沉积成型(FDM)的聚乳酸(PLA)/麦秸粉复合线材,然后打印成标准测试样条。研究了填充密度、层厚、打印速度、温度对3D打印制品的密度、打印时间、弯曲强度、弯曲模量、冲击强度以及动态力学性能的影响。结果表明:当打印制品的填充密度从20%提高到100%时,可以获得更高的力学性能和模量,弯曲强度、弯曲模量、冲击强度、储能模量分别提高了88.46%、44.20%、75.93%、43.39%,打印时间则延长了50.82%;当层厚从0.2 mm增加到0.7 mm时,制品的弯曲强度、弯曲模量、冲击强度分别下降了42.01%、39.94%、44.27%,但打印时间缩短了70.65%;当打印速度从20 mm/s提高到60 mm/s时,制品的弯曲强度、弯曲模量、冲击强度分别下降了33.52%、39.71%、37.14%,但打印时间缩短了43.75%;此外,温度的升高有利于制品层间的结合,当温度从190℃升至240℃时,制品的弯曲强度、弯曲模量、冲击强度分别提高了55.82%、33.33%、25.08%,但对打印时间没有影响。
[Abstract]:Poly (lactic acid) (PLA) / wheat straw composite wire which can be used for melt deposition forming (FDM) was prepared by extrusion molding, and then printed into standard test spline. The effects of filling density, layer thickness, printing speed and temperature on the density, printing time, bending strength, flexural modulus, impact strength and dynamic mechanical properties of 3D printed products were studied. The results show that higher mechanical properties and modulus, flexural strength, flexural modulus, impact strength can be obtained when the density of the printed products is increased from 20% to 100%. The storage modulus increased 88.46% and 44.20% 75.93%, respectively, and the printing time was increased by 50.82mm. When the thickness of the layer increased from 0.2 mm to 0.7 mm, the bending strength and modulus of the product were increased. The impact strength decreased by 42.01 and 39.94 respectively, but the printing time was shortened by 70.65. When the printing speed was increased from 20 mm/s to 60 mm/s, the bending strength, flexural modulus and impact strength of the product decreased 33.52%, 39.71% and 37.14%, respectively, but the printing time was reduced by 43.75%; in addition, when the printing speed was increased from 20 mm/s to 60 mm/s, the bending strength, modulus of bending, and impact strength of the product decreased 33.52%, respectively, but the printing time was reduced by 43.75. When the temperature rises from 190 鈩，

本文编号：2151107