Patent ID: 6273706
Filing Date: 2001-08-14
Classification: B29C

Abstract:
A valve nozzle (10) for connection to a separable and coolable tool having at least one mold cavity (K) for forming injection-molded items,said nozzle (10) formed of heatable material and comprising:a material pipe (14) through which a plastic material melt is fed under high pressure;a needle valve (20); andsliding guides within the nozzle supporting said needle valve (20),said needle valve having a lower section (22) adapted to permit the melt fed through said material pipe (14) to pass around at least said lower section (22) of the needle valve (20);said nozzle having an antechamber (30) upstream of the mold cavity (K);an end piece (24) of said lower section (22) received in a closely fitting outlet (18) of said antechamber (30);said antechamber (30) being in direct flow-connection with a pressure-relief means (32, 34) in a portion of said lower section (22) upstream of the end piece (24),wherein a guide piece (40) includes a branch-off bore (32) of said pressure-relief means, said branch-off bore (32) having an angle (W) relative to a longitudinal direction (L) of said needle valve (20).