| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a polyamide resin plate-shaped molded object capable of eliminating the problem of the sink or voids of the whole of the molded product without being restricted to the bottom part of the molded product, making it hard to produce air bubbles and capable of manufacturing two plate-shaped molded object at once, and a manufacturing method of the polyamide resin plate-shaped molded object. SOLUTION: In the method for manufacturing the polyamide resin plate-shaped molded object by injecting a polymerizable lactam liquid in a mold to polymerize the same, a lower mold 1 having a recessed V-shaped first molding surface 3 and the upper mold 2 having a protruded V-shaped second molding surface 4 fitted to the first molding surface 3 are used, the upper mold 2 is arranged with respect to the lower mold 1 at a predetermined interval to form a cavity C between the first and second molding surfaces 3 and 4, the polymerization of the polymerizable lactam liquid in the cavity C is advanced, the pressurization of the polymerizable lactam liquid is started in the upper mold 2 at the point of time when the polymerization is sufficiently advanced to further continue the polymerization under pressure and, after the polymerization is completed, the upper mold 2 and the lower mold 1 are separated to demold the molded object 5. COPYRIGHT: (C)2009,JPO&INPIT |
