초록 ▼

A nozzle head of thermoplastic material injection nozzle is closed in the customary manner with a closure head which has a jet orifice. A jet needle closes the jet orifice in a closed position. The needle is held axially displaceable in a needle bearing. An actuation lever is set into a slit-like re

A nozzle head of thermoplastic material injection nozzle is closed in the customary manner with a closure head which has a jet orifice. A jet needle closes the jet orifice in a closed position. The needle is held axially displaceable in a needle bearing. An actuation lever is set into a slit-like recess in the needle bearing and it is supported with a bearing ball carried at the rear wall of the needle bearing. A stroke transmission bolt set inbetween jet needle and actuation lever in overhung position serves for transmitting the closing force from the actuation lever to the jet needle. Upon opening, the injection pressure pushes the jet needle rearward if the actuation lever is rotated into the open position. In this arrangement a locking spring becomes superfluous and, consequently, no force counter to the spring force must be effected by the injection force.

대표청구항 ▼

An injection nozzle for thermoplastic synthesis processing injection molding machines, comprising a tubular nozzle head having a discharge end and an opposite infeed end, a closure head closing the discharge end having a jet discharge orifice and having a hollow interior, a needle bearing having an

An injection nozzle for thermoplastic synthesis processing injection molding machines, comprising a tubular nozzle head having a discharge end and an opposite infeed end, a closure head closing the discharge end having a jet discharge orifice and having a hollow interior, a needle bearing having an interior cavity with a bearing opening extending toward said nozzle head and having a lever opening extending in a lateral direction, a jet needle having a conical tip facing into the orifice and a shaft portion journalled in the bearing opening of said needle bearing and having an end facing into the cavity with a shaft end which has a substantially spherical recess, an actuation lever pivotally mounted in said needle bearing and having a face directed toward said shaft portion with a substantially spherical recess and having a tongue projecting through the lever opening, and a stroke transmission member disposed between said actuation lever and said jet needle having substantially spherical ends engaged in respective recesses in the needle shaft and said lever.