Method of manufacturing multicolor-foamed shoe body by supercritical foaming and multicolor-foamed shoe body thereof

A method of manufacturing a multicolor-foamed shoe body by supercritical foaming in an injection molding machine, comprising following steps:

• step S1:
• providing a plurality of cold shot model molds and injecting a plurality of foaming materials in different colors into a cavity of each of the plurality of cold shot model molds to form a plurality of cold shot models in different colors that is unfoamed, wherein each of the plurality of foaming materials is injected under a condition that a screw temperature is controlled lower than 200 degrees Celsius and the screw temperature means a temperature of the screw in the injection molding machine;
• step S2:
• placing the plurality of cold shot models in a hot-pressing mold for hot pressing to make a contacting surface of any two of the plurality of cold shot models that are adjacent engage with each other due to heating to form a semi-finished product, wherein the plurality of cold shot models comprises a shoe upper cold shot model and a shoe sole cold shot model, and the shoe upper cold shot model and the shoe sole cold shot model are made of the same foaming material;
• the shoe sole cold shot model is placed in a lower mold of the hot-pressing mold, and the shoe upper cold shot model is disposed on an internal core of the hot-pressing mold;
• when the hot-pressing mold is clamped, an upper mold of the hot-pressing mold drives the internal core to clamp towards the lower mold, making a bottom surface of the shoe upper cold shot model be in contact with a top surface of the shoe sole cold shot model and making the shoe upper cold shot model and the shoe sole cold shot model be received in the cavity formed between the internal core, the upper mold, and the lower mold, and the shoe upper cold shot model and the shoe sole cold shot model are assembled according to the cavity contour of the hot-pressing mold;
• and
• step S3:
• placing the semi-finished product in a supercritical foaming autoclave for foam molding to obtain the multicolor-foamed shoe body.