By the simulating analysis to CAE drawing software, adding draw bead restraining mold is applied on the area of deficient stretching, the eligible products are produced finally by die testing.
The basic characters of napped shoe upper leather from yellow cow hide were introduced. The technology of fabricating eligible products for market was founded according to these characters.
The largest difficulty of drawing die is requiring a feasible process project and well supplement to the process, the eligible products can be punched out only when the project is determined.