Method of manufacturing bathtub and bathtub, and method of manufacturing resin molded product with heat insulating material and resin molded product with heat insulating material

摘要

PROBLEM TO BE SOLVED: To reduce the burden on a worker and reduce the man-hours for manufacturing a bathtub, and suppress the deterioration of the heat retention performance of the bathtub. SOLUTION: A bathtub body (3) made of a thermosetting resin and a heat insulating material (5) provided on the surface of a thermosetting resin (51) having an uncured state are prepared. Next, the heat insulating material (5) and the bathtub body (3) are held by the outer surface of the wall portion (7, 9) of the bathtub body (3) via the heat insulating material (5) with respect to the holding type (101). Set to face the mold (101). Next, while giving the heat insulating material (5) a temperature at which the thermosetting resin (51) cures, the bathtub body (3) and the heat insulating material (5) are brought into contact with each other in a pressurized state to be joined. [Selection diagram] FIG. 8