Needle shut-off nozzle HP series
injectionfor meltfor special applications

Needle shut-off nozzle - HP series - Herzog AG - injection / for melt / for special applications
Needle shut-off nozzle - HP series - Herzog AG - injection / for melt / for special applications
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Characteristics

Function
injection
Fluid
for melt
Applications
for special applications
Other characteristics
pneumatic actuation, needle shut-off
Orifice diameter

3 mm, 5 mm, 8 mm
(0.118 in, 0.197 in, 0.315 in)

Pressure

Min.: 0 bar
(0 psi)

Max.: 600 bar
(8,702.3 psi)

Media temperature

400 °C
(752 °F)

Description

The pneumatically or hydraulically actuated machine needle shut-off nozzles type HP are used in processing of thermoplastics, principally with low viscosity materials such as: PA, PPS, PE, POM,PP. In this nozzle’s favour are: Cycle time reduction, shut-off at the nozzle orifice, withdrawal while dosing. Finds application in: Packaging, automobile and leisure industries, medicinal and electronic equipment. Operation: The assembly integrated actuator (pneumatically or hydraulically activated) controls a nozzle-axis positioned needle via a lever mechanism. The melt flow is therefore process dependently separated at the nozzle orifice. The needle mechanism is constructed in such a way, that with over-pressure an automatic opening of the nozzle is ensured. Modules for filters, mixers and GAIM-applications complete the range of shut-off nozzle products. Prevents: • Filamentation • Air pockets during screw retraction • Material leakage when dosing with a withdrawn injection unit • Material leakage while vertically injecting Applicable for special applications such as: • Physical foaming • Pre-compressing the melt • Hot-runner injection molding (e.g.. containers, pots) Supported process control: • Actuator piston position sensors (indicates if nozzle is “open” or “closed”) Productivity factors: • Controlled, clean shut-off of the melt stream • Shorter cycle times - increase in productivity • Increased process reliability and repeatability • Usability with increased back pressure - improved homogenization • Add-on capability (on tool side) Options: • Filter module • Mixer • GIT • Process monitoring with piston position sensors on the actuator
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.