| 摘要 |
PURPOSE:To manufacture a molded product with continuous voids which enhances an acoustic effect by cutting a cloth material such as unwoven cloth to a specified size and drying/curing the cloth material after applying a thermally curable resin to the cloth material and molding it under pressure in a die. CONSTITUTION:A polyester unwoven cloth 1b which becomes a core material is previously cut to a specified size, then an unsaturated polyester resin 1c is sprayed to both front and rear surface of the unwoven cloth 1b, and the cloth 1b is impregnated with the resin 1c to form a coated cloth sheet 1a. This coated cloth sheet 1a is deposited in a bottom force 3 of a die and a top force 2 is allowed to descend to press the bottom force 3 so that the coated sheet material 1a is molded to a specified shape. Further, the coated sheet material 1a as it is pressed is preliminarily heated, and is thermally cured after parting from the die to obtain a completely molded product. Using this manufacturing method, the unsaturated polyester resin 1c is hardened in a state that the unwoven cloth 1b is not completely impregnated with the resin 1c. Therefore, numerous voids communicating with the surface are formed in a stabilizer 1 as a molded product by scattering of volatile component and consequently, the acoustic effect is enhanced. |
