Automatic demolding injection molding device

The automatic demolding injection molding device comprises a bottom plate, a lower mold box is slidably connected to the upper surface of the bottom plate, two sets of sliding rails are fixedly connected to the upper surface of the bottom plate through side plates, the top ends of the two sets of sliding rails are jointly connected with a top plate, and an electric cylinder is fixedly installed at the top of the top plate; the output end of the electric cylinder penetrates and extends to the bottom of the top plate to be fixedly connected with an upper mold box, the upper mold box and a lower mold box are arranged in a matched mode, a frame body used for demolding connection is arranged in the lower mold box, an injection molding bottom plate is arranged in the frame body, and the injection molding bottom plate is connected and installed through the arranged lower mold box. The injection molding bottom plate is ejected through the elastic assemblies, the tops of the elastic assemblies are fixedly connected wi