초록 ▼

A free floating runner system wherein runner means, including a runner block and its runner extension, are mounted on their axial center lines on support means, with a gap between the runner structures and surrounding structures to allow the runner structures to freely thermally expand radially and

A free floating runner system wherein runner means, including a runner block and its runner extension, are mounted on their axial center lines on support means, with a gap between the runner structures and surrounding structures to allow the runner structures to freely thermally expand radially and axially. A force compensation system comprised of means, preferably hydraulic, for providing a forward force to the runner structures to offset any rearward force from axial floatation of the runner means and to provide an on-line, effective pressure contact seal between the nozzle sprues and injection cavity sprues. Methods provide an on-line effective pressure contact seal between co-injection nozzle sprues and injection cavity sprues.

대표청구항 ▼

A multi-coinjection nozzle injection molding apparatus for an injection molding machine, which comprises, runner means having channels for a plurality of polymeric material streams, and having a forward end with a plurality of co-injection nozzles mounted therein each having means for receiving the

A multi-coinjection nozzle injection molding apparatus for an injection molding machine, which comprises, runner means having channels for a plurality of polymeric material streams, and having a forward end with a plurality of co-injection nozzles mounted therein each having means for receiving the plurality of streams and for substantially simultaneously co-injecting a plurality of polymeric materials therefrom, support means for supporting the runner means, mounting means for mounting the runner means on the support means, and adapted to allow the runner means to float axially on the center line of the apparatus while the machine is in operation.