| 摘要 |
PURPOSE:To enable molding whose external appearance is beautiful by preventing the inside from generating unevenness caused by voids and sinks of the surface, by a method wherein a slide is made to follow a balance supporting device, a cavity is filled with a resin material through flowing and lowering control is applied to a slide in order by fixed pressurizing force in accordance with shrinkage caused by thermal reaction. CONSTITUTION:A resin material 10, which is in predetermined capacity obtained in anticipation of a shrinking quantity beforehand, is supplied on a bottom force 8 from a material supply device in a state that a top force 7 has ascended. Then a cavity 13 is filled with the resin material 10 through flowing by changing over to a low speed on the way by lowering a slide 5 at high speed by driving a hydraulic pressure source. The resin material 10 fills up the cavity 13 through flowing in this manner, which is pressurized and held by predetermined pressurizing force. Then when the resin material 10 beings to shrink through thermal reaction, if holding force to be detected by a pressure detector 12 is increased by about 3-4% in accordance with the shrinking quantity, press molding of a molded article having a predetermined form is performed by pressurizing the resin material for a fixed period of time until completion of reactive cure while lowering control of a balance supporting device 11 is being performed in order every 0.01-0.1mm. Therefore, as the slide follows the shrinking quantity according to the same and the slide can be held by constant pressurizing force, a beautiful molded article having neither a warp nor a sink is obtained. |
