High replication fidelity is a prerequisite of high quality plastic microstructured parts in injection molding. But

there’s not an economical and practical method to evaluate and improve the replication fidelity until now. Based on part weight evaluation

this paper studied a new method of replication fidelity improvement. In order to improve replication fidelity of microstructured parts

this paper took micro lens array as the application case and the part weight as quantitative assessment index of replication fidelity

studied the effects of processing parameters(melt temperature

mold temperature

injection time

packing pressure and packing time) on the part weight of microstructured parts in injection molding by experiment. The results showed that the increase of melt temperature and mold temperature could make the packing pressure transfer to micro cavity more effectively through runner system

and increasing the part weight; The higher the part weight

the better the filling of the microstructures. In conclusion

part weight can be used to evaluate the replication fidelity of microstructured parts primarily; investigation of the influence of processing parameter on the part weight can be used to improve the replication fidelity of microstructured parts.