3D printing based complex structure mold manufacturing method and molding method

The invention disclosed a 3D printing based complex structure mold manufacturing method and a molding method. The 3D printing based complex structure mold manufacturing method comprises the following steps: constructing a target model and a model manufacturing device so as to obtain a target model file and a mold manufacturing device file; guiding the 3D model file and the mold manufacturing device file into a 3D printer, and manufacturing a target model and a mold manufacturing device; laying a silica gel membrane or a gelatin membrane on the surface of the target model to cure; coating the inner surface of the mold manufacturing device and the film surface of the target model with a blocking material layer, and positioning the model in the mold manufacturing device; casting with a lower mold liquid, and curing so as to obtain a lower mold; coating the partition surface on the lower mold with the blocking material layer, casting an upper mold liquid, curing and removing the target model so as to obtain dies of the upper mold and the lower mold with complex structure profile features. Based on the proven 3D printing technique, by adopting the 3D printing based complex structure mold manufacturing method and the molding method, the stability and controllability are good; the price is economic; in addition, the production is easy to configure and optimize by off-line printing.