| 摘要 |
A novel and improved metal mold for molding a runnerless product can be provided. The metal mold according to the present invention comprises a stationary and a movable mold halves, one of which is provided at the center thereof with a recess and the other of which is provided with a compression core to be retractably received by said recess, said stationary and movable mold halves defining a cavity for the runnerless product, and further comprises a hot nozzle inserted into the recess or the compression core and having a tip projecting therefrom to allow resin to be left around the nozzle. In such a construction, a runner section and a gate are defined by said recess and the compression core so as that they are closable by the movement of said compression core, and thereby the center of the final product, e.g. a disc can certainly be finished without punching, cutting or the like.
|
