基于SLA成型的光敏树脂3D打印工艺及性能

Processing and Properties of Photosensitive Resin for 3D Printing Based on SLA Molding

以国产光敏树脂为打印材料,基于立体光刻(SLA)光固化技术制备实验样品,研究了激光功率、光斑直径、切片厚度和填充扫描速度几个SLA工艺参数对样品的打印时间、密度、尺寸偏差、表面粗糙度和弯曲强度的影响。结果表明,基于SLA技术打印的实验样品,其密度和弯曲强度的大小主要由材质本身决定;当填充扫描速度为5 000～8 000mm/s时,样品的打印效果较好;打印时间与切片厚度几乎成反比例函数关系;样品尺寸偏差的绝对值随着切片厚度的增加呈现先下降后上升的趋势,表面粗糙度随着切片厚度的增加而增大;当切片厚度为0.15mm时,X向和Y向尺寸偏差绝对值的平均值最小,为0.01mm;当切片厚度为0.1mm时,XZ平面和YZ平面的表面粗糙度的平均值最小,为0.784μm。

Based on stereo lithigraphy apparatus (SLA) curing technology,experimental samples were prepared by domestic photosensitive resin. The influences of laser power,laser spot diameter,slice thickness and filling scanning speed on the printing time,density,size deviation,surface roughness and bending strength of samples were studied. The results indicate that the density and bending strength of the sample manufactured by SLA are determined by the material itself. When the filling scanning speed is set to 5 000~8 000 mm/s,the printing effects of sample is better. Printing time is almost inverse proportional function with the slice thickness. The absolute value of the sample size deviation are decrease first and then increase with the increase of the slice thickness, and the surface roughness of the sample increase with the increase of the slice thickness. When the thickness of the slice is set to 0.15mm,the absolute value of the X dimension and Y dimension size deviation is the smallest,which is 0.01mm. When the slice thickness is set to 0.1mm,the surface roughness on the XZ plane and YZ plane is the smallest,which is 0.784μm.