Negative mold for luggage molding and application thereof

A negative-mold blister mold system for molding a luggage, comprising:

• an upper mold assembly, comprising an upper mold holder and a convex mold adapted and connected to the upper mold holder;
• wherein the upper mold holder is arranged with a first airflow channel passing through the convex mold, and the convex mold is capable of being driven by a drive member;
• a lower mold assembly, comprising a lower mold holder, a concave mold, and a lifting platform for driving the concave mold to move;
• and
• a material frame, arranged on the lower mold holder to clamp a sheet, such that the sheet is suspended above the lower mold holder;
• wherein the convex mold and the concave mold are configured to switch between an adsorbed state and a mold detaching state;
• in the adsorbed state, the upper mold holder abuts against the material frame to define an upper air cavity above the sheet, the upper air cavity being in communication with the first airflow channel;
• air is blown downward through the first airflow channel to form a positive pressure in the upper air cavity, such that the sheet is stretched, while each of the convex mold and the concave mold moves in a direction close to the sheet to define a molding space, such that the stretched sheet fits the concave mold under a gas pressure of the first airflow channel and is evenly distributed along the molding space under a pressure of the convex mold;
• in the mold detaching state, each of the convex mold and the concave mold moves toward in another direction away from the material frame to detach the molded sheet.