激光烧结制备塑料功能件

采用选择性激光烧结技术(SLS)直接制备高强度塑料功能件，考察了激光功率、扫描速度、单层层厚等工艺参数及无机填料对成型件强度的影响。在激光功率10W、扫描速度1500mm／s、单层层厚0．15mm的较佳烧结工艺参数下，制备了拉伸强度、弯曲强度、冲击强度分别达到44MPa、50．8MPa、37．214／m^2的SLS成型件。随着填料用量的增加，烧结件的拉伸强度略有增加，冲击强度下降，在填料用量为40％(质量含量，下同)时弯曲强度达到最大值。

Preparation of Plastic Functional Products by Selective Laser Sintering

Selective laser sintering (SLS) was employed to pre pa re plastic functional products. The effects of the sintering parameters, includi ng laser power, scanning speed, and thickness of a single layer, as well as the inorganic additive on the mechanical properties of the sintered specimens were i nvestigated. The optimal parameters were as followings: laser power 10 W, scanni ng speed 1 500 mm/s, thickness of a single layer 0.15 mm. With these parameters, specimens with tensile strength about 44 MPa, flexural strength about 50.8 MPa, and impact strength about 36.7 kJ/m2 were successfully fabricated. With incre asing inorganic additive content, the tensile strength of the sintered parts inc reased slightly and the impact strength decreased noticeably. The sintered parts exhibited a maximum in the flexural strength with the 40 % additive.