| 摘要 |
<p>The present invention relates to a two-stage operated injection mold having an undercut molded structure using an undercut molded ring, which comprises: a lower mold (100) formed with a first cooling water flow path (11); an upper mold (20) formed with a protrusion (21) on the lower end of the inner circumferential surface; and a core mold (30) formed with a second cooling water flow path (31) inside, and a mold cavity (50) corresponding to a form of a molded article (60) formed. The core mold (30) is formed with a first core mold (32), a second core mold (33), and a third core mold (34). The outer circumferential surface of the first core mold (32) is formed with an insertion groove (321). An undercut molded ring (40) in a form corresponding to a form of an undercut (61) inside the molded article (60) is inserted and installed in the insertion groove (321). The undercut molded ring (40) is formed with a ring groove (41) on a cross-section unit. The second core mold (33) is coupled to the ring groove (41).</p> |
