Producing method of a packing case using polypropylene resin or expanded poly ethylene and packing case thereby

摘要

The present invention relates to the manufacture of a packaging box for safely storing display device products such as glass substrates, cells, etc., while manufacturing at a minimum cost through an optimal process and at the same time making it easier to transport and stack. will be.; The present invention for this purpose is a shredding process (S1) for finely crushing the pellet (1) made of polypropylene resin (Polypropylene Resin) into mini-pellets (10); Injecting the mini-pellet 10 into the reactor (M2), the impregnation step (S2) of alternatively stirring with carbon dioxide (CO2) or butane (C4H10) gas; Foaming step (S3) to obtain a foam 20 in the form of spherical particles in the mini-pellet 10 through the impregnation step (S2); A preparation step (S4) of storing the spherical particulate foam 20 in the hopper container M3; A pressurizing step (S5) of inserting the foam 20 stored in the hopper barrel M3 into the pressure tank M4 to obtain a further expanded foam 20; The foam 20 expanded by the pressing process S5 is filled in the mold M5 to form a molding member 30 represented by the main body member 40a and the cover member 40b, but these molding members 30 A molding step (S6) constituting the separator plate 42, the open groove 44, the band groove 46, the laminated groove 48a, the laminated jaw 48b, and the like at the upper and lower ends thereof; Separation step (S7) for leaving the molding member 30; A drying step (S8) of transporting the separated forming member 30 to a drying chamber M6 to evaporate moisture; In the course of performing the shredding step (S1), impregnation step (S2), drying step (S8), by applying a chemical coating step (S9) or a physical clean step (S10) alternatively to prevent the occurrence of static electricity of the molding member 30 And further processing to remove dust; After performing a structural and physical property test, such as a poor molding and dust concentration of the molding member 30, characterized in that the manufacturing proceeds to the inspection / shipment process (S11) to be shipped through the transport means (M7).;Therefore, the present invention will have an effect that can be easily transported and stacked at the same time to manufacture a box for safe storage of various display device products at a minimum cost through an optimal management process.;Polypropylene, Pellets, Foam, Foam, Packaging Boxes, Molded Parts, Display Devices