纳米石墨片微粉喷射成型工艺数值模拟

Nano graphite sheet micro powder injection molding process numerical simulation

微粉喷射成型法具有成型效率高、对微粉落点精确可控等优点,有望成为纳米石墨片器件制备新方法。文章利用计算流体力学分析软件对纳米石墨片微喷射成型过程中的射流流场进行数值模拟分析,对比研究了入口压力、喷射距离、送粉量等工艺参数对纳米石墨片微粒加速行为的影响,揭示了纳米石墨片在基体中分布规律。结果表明:入口压力和喷射距离越大,粒子在基体上分布范围越大,而送粉量对粒子的分布范围没有实质性影响,并通过实例验证了微喷射成型工艺的可行性。

Micro powder injection molding in molding with high efficiency,and the advantages of the powder point precisely controlled,is expected to become a new method for preparation of nano graphite sheet of complex components. This paper,by using the computational fluid dynamics analysis software of nano graphite sheet of micro injection molding process of the jet flow field numerical simulation analysis,comparative study the influence of the process parameters such as the inlet pressure,jet distance,send powder amount on nano graphite sheet particle acceleration behavior,reveals the distribution regularity of nano graphite sheet in the matrix. The results show that： the greater of the inlet pressure and jet distance,the greater of the particles distribution range in the matrix,the feeding amount of particles has no effect on the particles distribution range in the matrix,and through the given example to verify the feasibility of micro injection molding process.