| 摘要 |
PURPOSE:To furnish a product of a laminated panel of excellent quality inexpensively irrespective of the shape and dimensions of the laminated panel. CONSTITUTION:In a manufacturing method of a laminated panel wherein a flat frame is prepared by disposing separately two plate materials designed to form outer layers of a laminated panel and a stock solution of a hard urethane foam is injected into the frame and foamed, expanded and cured, a punching metal 23 is used for either one or both of the plate materials and the stock solution of the hard polyurethane foam is injected one or a plurality of times through one or a plurality of holes 28 out of a number of holes 28 provided in the punching metal 23. |
