Patent ID: 6159000
Filing Date: 2000-12-12
Classification: B29C

Abstract:
A hot runner valve gated system which directs melt to a melt cavity, which comprises:at least one nozzle body adapted to be positioned in a mold plate;a mold cavity gate with a gate orifice therein adapted to be positioned adjacent a mold cavity;channel means extending through the nozzle body for directing melt to said gate;a reciprocable valve stem positioned within the nozzle body;means for reciprocating said valve stem for opening and closing the gate orifice;a fixed guide sleeve positioned within the nozzle body and surrounding at least a portion of the valve stem to guide the valve stem, provide sliding engagement of the valve stem inside the guide sleeve and to provide a sealing means at the gate end of the nozzle body; andat least one annular melt channel communicating with said channel means and surrounding said guide sleeve, including flow guiding means adjacent the valve stem to guide the melt flow to the annular melt channel,wherein the guide sleeve is operative to deflect against the valve stem when subjected to plastic pressure.