Carbon dioxide supercritical physical dissolution, permeation and foaming process

The invention discloses a carbon dioxide supercritical physical dissolution, permeation and foaming process. The process is characterized in that a plastic raw material is melted in a mold cavity, carbon dioxide gas is introduced for pressurization, diffused and dissolved in liquid plastic to form a homogeneous system, and the temperature is reduced; the mold cavity filled with the plastic material in which the carbon dioxide dissolved uniformly is transferred into a shaping mold with a required shape design; the mold cavity is removed, pressure is released, and the carbon dioxide gas nucleates and grows in the system and expands rapidly in the shaping mold; the temperature of the shaping mold is reduced to room temperature, and the shaping mold is removed to obtain a product in a designedshape. The process is suitable for plastic materials with various components, the carbon dioxide dissolution speed is high, the dissolution amount is easy to control, formed bubbles are fine and uniform, and the performance