PS plastic particle molding processes are flexible, with the mainstream ones being injection, extrusion, and foaming: injection molding can mass-produce small parts with complex shapes, extrusion molding can produce profiles such as plates and pipes, and foam molding can create lightweight foam products. They have a wide range of uses, including food packaging (such as lunch boxes), toys and stationery, electronic device casings and insulation parts, and can also be made into building insulation foam and decorative plates. They have the advantages of low cost and easy processing, meeting the needs of multiple fields.