Research On Nylon 6/Copper Composite Powder Manufacture Plastic Molds By Selective Laser Sintering

In recent years, the demand of the rapid and changeful, selection of laser sintering today (SLS) as a representative of rapid prototyping (RP) due to its applicable materials and more and more close, and is widely used in many fields. This project aims to play for complex shape of laser sintering constituency of outstanding characteristics, research by mechanical blending mixed copper and nylon 6 powder, preparation of laser sintering applicable constituency of composite powder, in order to achieve rapid non destructive manufacturing plastic mould. The main research contents and the results are as follows:Through the analysis of the forming mechanism of laser sintering and sintering material requirements of the composite powder, determine the composition, Study of nylon 6 / copper powder particle size and size of nylon 6 / copper powder sintering the influence on collocation, introducing the theory of composite piles powder particle size of the powders components of tie in and matching rate.For SLS thermo gravimetric (TG) detection, nylon 6 / cu powder to 350 degrees of thermal stability, composite powder producing plastic mould can satisfy the requirements on thermal stability, Through the experiment of the SLS part, USES the tensile strength of the powder sintering NH4 tensile strength of the SLS part has been able to meet manufacturing requirements of mechanical properties of plastic mold, Of the SLS tensile strength and elongation of experimental results show that, with the content of nylon, copper powder content in a certain range increased to help improve mechanical properties of the SLS part, SEM experiment of the SLS observed in the interior, copper powder in local still exist certain reunion, Through the laser energy density on the mechanical properties of the SLS part, found that simple change laser power or scanning speed is equivalent to sintering, On the research of the SLS dimension accuracy, found with nylon content, the horizontal dimension, but at the height of the error on the direction, nylon content on the dimension precision is not obvious.