| 摘要 |
PURPOSE:To adhere a reinforcing material to a base material, make a foamable material to be foamed and harden a resin material efficiently by a method wherein a reinforcing material containing a thermosetting resin and a foaming material is adhered to a base material after under-coating the base material, and is foamed and hardened by using the heat supplied at the time of drying a top coat. CONSTITUTION:Press working of an outer panel 2 and an inner panel 5 for a door 1 and the like and assembling thereof are conducted in a car body assembling step A. In a coating step B a pretreating step 20 for carrying out degreasing, washing, chemical conversion treatment and the like, a drying step 21, an under-coating step 22, a baking step 23, an intermediate coating step 24, a baking step 25, a top coating step 26, a baking step 27, an inspection and touching-up step 28, etc. in that order are provided. The reinforcing material 13 containing a thermosetting resin material 11a and a foamable material 14 is first adhered to the base material 2a for forming a panel at a part requiring stiffness, after under-coating the base material 2a. Then, by using the heat supplied in the top coating step, the foamable material 14 is foamed to expand the reinforcing material 13 and the material 13 is hardened, whereby a reinforcing rib 12 in the form of a tunnel is molded as one body with the base material 2a. |
