| 摘要 |
<p>The present invention relates to a cam assembly comprising a cam core fixture, a cam core and a cam rod for treating an inner undercut of a molded product in an injection molding mold. The cam assembly according to an embodiment of the present invention comprises: the cam core fixture which forms a part of a molding side of a molded product by being installed and fixed in an operation mold; the cam core which is able to move forward and backward on a cavity by being inserted into the cam core fixture; and the cam rod which operates the forward movement and backward movement of the cam core by being inserted into the cam core. The cam rod includes a vertical part and an inclination part. The cam core includes a cam rod sliding hole having an inclination angle same with that of the inclination part of the cam rod, and the inclination part of the cam rod is inserted to be slid in the sliding hole of the cam rod. A protrusion part is formed on one side of the cam core, and a chin part protrudes from the end of the protrusion part. The chin part of the cam core forms the inner undercut part of the molded product by moving towards the cavity in the mold when the cam rod moves forward and solves undercut problems by allowing the chin part of the cam core to escape from the inner undercut part of the molded product when the cam rod moves backward. A part applied by injection pressure among the cam core is only the chin part of the cam core.</p> |
