| 摘要 |
<p>A method and apparatus for selectively separating runners and molded products from an injection mold assembly (20). The apparatus comprises first and second mold portions (25, 27) having mating surfaces formed to define a runner channel (51) and product cavity (43). A plurality of ejector pins (39, 47) are disposed within the second mold portion (27) and adapted to translate within the second mold portion (27) so as to retractably extend into the cavities (43) for forming the runner and molded product. An ejector plate assembly (29) is provided which translates the ejector pins (39, 47) a predetermined distance within the mold. A pin extension mechanism (59) is connected to the ejector plate assembly (29) and at least one ejector pin. The pin extension mechanism (59) selectively extends the connected ejector pin (34) a predetermined distance beyond the stroke of the ejector plate assembly (29) such that the connected pin (39) is extended into contact with the channels for forming the runner, or the molded product (45).</p> |
