초록 ▼

As in the conventional manner for molding an optical component, a molding cavity is used in combination with a relief chamber with which the molding cavity can selectively communicate. There is no communication between the relief chamber and the molding cavity while the latter is filled. The molding

As in the conventional manner for molding an optical component, a molding cavity is used in combination with a relief chamber with which the molding cavity can selectively communicate. There is no communication between the relief chamber and the molding cavity while the latter is filled. The molding cavity is then placed in communication with the relief chamber. Subsequently, relative displacement of the relief chamber and the molding cavity parallel to the axis of the combination interrupts such communication. The optical component thus molded may be of any kind, such as an optical lens, specifically an ophthalmic lens.

대표청구항 ▼

A method for molding an optical component from synthetic material in a molding device including a suitably shaped molding cavity and a relief chamber for accommodating excess synthetic material selectively communicable with the molding chamber, the molding cavity and the relief chamber being relativ

A method for molding an optical component from synthetic material in a molding device including a suitably shaped molding cavity and a relief chamber for accommodating excess synthetic material selectively communicable with the molding chamber, the molding cavity and the relief chamber being relatively axially displaceable, the method comprising the steps of: filling the molding cavity with an appropriate amount of synthetic material while the molding cavity is out of communication with the relief chamber, pressurizing the molding cavity and bringing the molding cavity into communication with the relief chamber, thereafter axially displacing the molding cavity relative to the relief chamber to interrupt communication therebetween and to sever synthetic material in the molding cavity from synthetic material in the relief chamber, and opening the molding cavity and discharging the molded optical component. A device for molding optical components from synthetic material, said device comprising means defining a molding cavity having a configuration adapted to form a desired optical component, means for filling said molding cavity with synthetic material, means defining a relief chamber selectively communicable with said molding cavity, means for pressurizing the synthetic material in said molding cavity and means for controlling communication between said molding cavity and said relief chamber so that during filling of said molding cavity said molding cavity and said relief chamber are out of communication with each other and during pressurization said molding chamber and said relief chamber are in communication with each other, and means for mounting said molding cavity relative to said relief chamber for relative axial displacement for interrupting communication between said molding cavity and said relief chamber, and for severing synthetic material in said molding cavity from the synthetic material in such relief chamber.