| 摘要 |
A lower mold and an upper mold are combined to form an enclosed space containing a production cavity and a sealed room. A base fiber material is placed in the production cavity. The production cavity has a first space and a second space. After a gas in the enclosed space has been discharged, a first predetermined amount of a liquid resin is supplied to the first space. After supply of the liquid resin is stopped (or while the liquid resin is continuously supplied), the upper mold is lowered relatively further toward the lower mold, whereby the volume of the production cavity becomes reduced. Preferably, a second predetermined amount of the liquid resin is supplied to the first space having a large volume, whereupon the supplied liquid resin flows from the first space into the second space having a small volume. |
| 主权项 |
1. A molding method for impregnating a base fiber material placed in a production cavity defined between a lower mold and an upper mold, with a liquid resin supplied to the production cavity, in order to produce a molded article of a fiber-reinforced plastic,
wherein: a first sealing member and a second sealing member are disposed respectively on the lower mold and the upper mold, or both the first sealing member and the second sealing member are disposed on the lower mold or the upper mold; and at least one of the lower mold and the upper mold has an exhaust passage; and the method comprises: a first step of, when the upper mold is moved relatively toward the lower mold, using the first sealing member to form an enclosed space containing the production cavity between the lower mold and the upper mold; a second step of, after formation of the enclosed space, discharging a gas in the enclosed space from the exhaust passage; a third step of, when the upper mold is moved relatively further toward the lower mold, using the second sealing member to divide the enclosed space into the production cavity and a sealed room, wherein the sealed room is formed between the first sealing member and the second sealing member and communicates with the exhaust passage, and thereafter supplying a first predetermined amount of the liquid resin to the production cavity; a fourth step of, when the upper mold is moved relatively further toward the lower mold, reducing the volume of the production cavity; a fifth step of, at same time or after a reduction in volume of the production cavity, supplying a second predetermined amount of the liquid resin to the production cavity and allowing the liquid resin to flow; and a sixth step of hardening the liquid resin, with which the base fiber material has been impregnated, to thereby prepare the molded article, and thereafter releasing the molded article from the lower mold and the upper mold. |
