| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a molded board product which can stabilize accuracy at the time of polishing an end part of the molded board product.SOLUTION: A method for manufacturing a molded board product includes: a molding step of molding a package tray 20 by pressing a pre-board P1 comprising a thermoplastic resin by a pair of molding dies 31, 32 and cutting a peripheral end part P2 of the pre-board P1 by cutting blades 31B, 33A; and a polishing step of polishing an extension part 22 in the package tray 20 by a polishing member 41 after the molding step to chamfer the extension part 22. In the polishing step, the extension part 22 is engaged with a groove part 42 formed in the polishing member 41, and the polishing member 41 is energized to the extension part 22 side by a coil spring 47 compressed from a natural state, thereby forming a pressing state where a polishing surface 42A formed on an inner surface of the groove part 42 presses the extension part 22. The extension part 22 is polished by sliding the polishing surface 42A in the pressing state with respect to the extension part 22. |
