Patent ID: 8119054

Claim:
A method for manufacturing molded products, comprising: a resin coating step of coating a molten thermoplastic resin onto a metal mold having a minute uneven portion on a surface thereof; a compressing step of compressing the coating of molten thermoplastic resin against the metal mold thereby producing a shape of a final molded product; and a solidifying step of solidifying the coating of molten thermoplastic resin by cooling the coating of molten thermoplastic resin; wherein the resin coating step further includes: supplying the molten thermoplastic resin to a resin coating device including a discharge port; discharging the molten thermoplastic resin onto the minute uneven portion from above while moving the resin coating device, wherein the distance between a distal end of the discharge port and the metal mold is equal to a thickness of the coating of the molten thermoplastic resin on the metal mold; wherein a discharge pressure of the resin coating device causes the molten thermoplastic resin to fill the minute uneven portion and pushes out air from between the thermoplastic resin and the minute uneven portion on the mold; filling the molten thermoplastic resin into the minute uneven portion such that the thermoplastic resin has a shape and a thickness that is substantially the same as a shape and a thickness of the final molded product; and heating the metal mold such that the thermoplastic resin is capable of adhering to the minute uneven portion; wherein the molten thermoplastic resin is compressed by a pressure no greater than 80 kg/cm 2 .