Patent ID: 11964415
Assignee: HUSKY INJECTION MOLDING SYSTEMS LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An apparatus for operating a mold having a cavity and a mold core that cooperatively define a mold for molding of plastic articles, comprising:
a clamping assembly operable to move mold plates relative to each other between a closed position in which said plates abut in clamped contact, and an open position in which the plates are separated;
a core actuator operable to move said mold core relative to said plates along a core axis between a closed position in which said mold core is interposed between said plates, a preload position in which said mold core is compressed from said closed position towards said plates, and a removal position in which said mold core is retracted for removal of a molded article;
wherein said mold core comprises an inner core and an outer core positioned around said inner core, wherein said core actuator is operable to move one of said inner core and said outer core relative to the other of said inner core and said outer core along said core axis and to withdraw said inner core relative to said outer core in said removal position, to dislodge a molded part from said inner core;
a spring load assembly for supporting said mold core against said plates, wherein movement of said mold core from said closed position to said preload position compresses said spring load assembly;
wherein, the spring load assembly is a core reset assembly, such that during molding, core reset assembly is compressed under a preload force with which inner core and outer core are urged into the mold cavity to resist molding pressure, and at mold opening, core reset assembly urges inner core and outer core into neutral positions for release of the molded part.