초록 ▼

Apparatus for unit cavity and multi-cavity, multi-layer injection molding and injection blow molding machines are provided, which, in preferred embodiments, include: Coinjection nozzle means, each for plural polymers, valve means for each nozzle, the valve means being adapted to move through a nozzl

Apparatus for unit cavity and multi-cavity, multi-layer injection molding and injection blow molding machines are provided, which, in preferred embodiments, include: Coinjection nozzle means, each for plural polymers, valve means for each nozzle, the valve means being adapted to move through a nozzle central channel to clear the nozzle channel of melt, a feed-block for each nozzle, polymer melt splitters, drive means for each valve means, a free floating runner system and a force compensation system to provide an effective pressure seal between the nozzles and the cavity block.

대표청구항 ▼

Apparatus for simultaneously driving each of a plurality of valve means identically through each of a plurality of co-injection nozzle means mounted in a multi-nozzle, multi-polymer injection molding machine, which comprises, a plurality of co-injection nozzle means, each adapted to receive valve me

Apparatus for simultaneously driving each of a plurality of valve means identically through each of a plurality of co-injection nozzle means mounted in a multi-nozzle, multi-polymer injection molding machine, which comprises, a plurality of co-injection nozzle means, each adapted to receive valve means, and each having plural passages for feeding plural polymeric materials, a plurality of identical valve means one only being for each of the co-injection nozzle means and each adapted to operate therewithin to, in each nozzle means, identically initiate, regulate and terminate the flow of the respective, plural polymeric materials therethrough, drive means adapted for simultaneously and identically driving the plurality of valve means, including common moving means to which each of the valve means is connected in a manner that simultaneously provides identical movements of each of the valve means within the co-injection nozzle means within which it operates, and provides in each nozzle simultaneous identical control over the initiation, regulation and termination of the flow of said plural polymeric materials through each of the co-injection nozzle means, and control means connected to the common moving means, for moving the common moving means in a desired mode which provides said identical simultaneous movements and said identical simultaneous flow controls.