Type HP Shut Off Nozzle
Machine shut-off nozzle, type HP
Machine nozzle with needle shut-off type HP
pneumatically or hydraulically controlled
Applications:
Thermoplastics (not applicable for PVC)
Shut-off mechanism:
Needle shut-off with integrated 2-way actuator
pneumatically or hydraulically operated
Index of contents
Chapter
Page
Technical description .................................................................................................. 2
Advantages of needle shut-off type HP ...................................................................... 2
What speaks for Herzog ............................................................................................. 2
Integrated actuator ..................................................................................................... 3
Machine-side actuator ................................................................................................ 3
Assembly alignment ................................................................................................... 3
Risk of collision by diving into the mold ...................................................................... 4
Tip types ..................................................................................................................... 4
Optional Extras ...................................................................................................... 5 - 6
Data sheet .................................................................................................................. 7
Dimension sheet for inquiries or orders ...................................................................... 8
herzog systems ag
Tel. +41 (0)71 394 19 69
Fax. +41 (0)71 394 19 60
www.herzog-ag.com
info@herzog-ag.com
1
T. D. Version 0.8
Machine shut-off nozzle, type HP
Technical 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, dosing with retracted injection unit.
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
independently 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.
Note:
Values and measurements in this documentation refer to standard applications.
Advantages of needle shut-off type HP
Prevents:
 Stringing
 Material leakage when dosing with a retracted injection unit
 Material leakage while vertically injecting
Highlights:
 Melt flow separation at nozzle orifice
 Operating pressure: 3000bar at 400°C
 Proven shut-off with high-speed units
 Robust, reliable separation
 Suitable for special applications
 Compact, interchangeable design
Applicable for special applications such as:
 Physical and chemical 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
Options:
 Filter module
 Mixer
 GIT
 Process monitoring with piston position sensors on the actuator
herzog systems ag
Tel. +41 (0)71 394 19 69
Fax. +41 (0)71 394 19 60
www.herzog-ag.com
info@herzog-ag.com
2
T. D. Version 0.8
Machine shut-off nozzle, type HP
What speaks for Herzog






Nozzle activity is the core business
Many years market presence
Design and assemblies matching today‘s requirements
Development of special applications
Fast delivery
Service performance
Integrated Actuator
Specially manufactured two-way piston cylinders with temperature resistant seals (up to
180°C) are used in the pneumatic and hydraulic actuators. The actuator together with the
nozzle assembly forms a compact unit.
The cylinders are operated from input data on the machine control unit.
Advantages on an integrated actuator:
 No installation errors
 Adjustments such as; stroke, force, etc. on the control unit are eliminated
 No alignment between nozzle and cylinder is required
Control cylinder contruction (acc. to usual energy sources):
 Pnuematic: 5 - 10 bar
 Hydraulic: 40 - 70 bar
Note! Use a flexible cylinder supply
 Air connection G1/8“
 Oil connection G1/4“
 Water connection G1/8“
Water cooling on the hydraulic cylinder
Heat conduction from the nozzle warms the cylinder. To ensure the hydraulic oil does not
degrade, the cylinder temperature should remain between 20 - 60°C.
Machine-side actuator
If a machine-side actuator is to be used, the leverage installation and connection (range,
force and alignment) with the nozzle must be carefully carried out.
For a smooth, trouble-free operation, the following requirements must be met:
Two-way actuator:
 Max. force on lever: HP0 = 800N, HP1 = 900N, HP2 = 2000N
 Min. cylinder range: HP0 = 18mm, HP1 = 20mm, HP2 = 26mm
← 360° →
Assembly alignment
The actuator position is rotational within 360°.
Proven and tested between 4 and 8 o‘clock.
8:00
herzog systems ag
4:00
Tel. +41 (0)71 394 19 69
Fax. +41 (0)71 394 19 60
www.herzog-ag.com
info@herzog-ag.com
3
T. D. Version 0.8
Machine shut-off nozzle, type HP
Risk of collision by diving into the mold
The stars in the graphic represent exposed
areas of the nozzle. The required area
should be checked in the machine plate.
K
(mm)
HP 0
HP 1
HP 2
P
70
77
96
Q
51
64
92
S
84
95
124
T
87
117
173
S
Tip length variable to immersion depth
(see Tip types)
K
P
Q
T
In certain circumstances a longer tip can ensure collision avoidance. In this case the tip
dimension K would be adjusted. For standard sizes see Tip types.
Tip types
K
One-piece tip: two lengths
HP 0
HP 1
HP 2
K length in mm
24 *
40
32 *
50
50 *
80
Heater band (ø x width in mm)
—
Ø26 x 16
—
Ø35 x 18
—
Ø50 x 30
* Standard tip
(included in the base model)
Two-piece tip
HP 0
HP 1
HP 2
K length in mm
60, 80, 100, 130, 160
80, 100, 130, 160, 190
100, 130, 160, 190
Ø35 x K-40mm
Ø40 x K-55mm
Ø60 x K-70mm
K
Heater band ø
Heater band
Option: Other lengths are custom manufactured
Extensions require an adjustable heating system
The star represents an exposed area
tip cap
Heater band
tip base
For restricted spaces different heating possibilites are available, see Alternative tip
heating systems on page 6.
(See Optional Extras, Heating Systems)
herzog systems ag
Tel. +41 (0)71 394 19 69
Fax. +41 (0)71 394 19 60
www.herzog-ag.com
info@herzog-ag.com
4
T. D. Version 0.8
Machine shut-off nozzle, type HP
Optional Extras
Filter → preventive strategy
Keep gates in hot runners free of foreign bodies or filter out unwanted fragments when
using re-grinded material. We offer a low pressure drop screen filter.
(More information under Optional Extras, Melt filter)
Mixer → improved quality on injection molded parts
A homogenized melt (in colour and temperature) reduces the reject rate and produces a
considerable improvement in the quality of the molded part. The installation of the mixer
takes place either before or after the nozzle. We use a static mixer.
(More information under Open machine nozzles, type,M)
GIT (Gas Injection Technology) → cycle time, quality on injection molded parts
Gas is injected through the gate core. To use the nozzle for the GIT process, the tip is
changed. A special valve closes the gas feed area to make it completely polymersealed. The robust, maintenance free gas module ensures a safe process. Optimally the
module is used in combination with the shut-off nozzle, but for certain processes the
module can also be used without the shut-off nozzle.
(More information under Open machine nozzles, type GM)
herzog systems ag
Tel. +41 (0)71 394 19 69
Fax. +41 (0)71 394 19 60
www.herzog-ag.com
info@herzog-ag.com
5
T. D. Version 0.8
Machine shut-off nozzle, type HP
Alternative tip heating systems - Note: requires adjustable heating
Space saving external heating system
A standard heater band requires space in the nozzle immersion area (machine plate mold).
Possibility for restricted spaces:
Heater band with flat cap connection and wedge clamping or cylindrical heat cartridges.
(More information under Optional Extras, Heating systems)
Integrated tip heating system
Tip mounted haterbands have exposed areas. When injecting out the problem of over
injecting can arise. This requires time consuming cleaning which can result in damage to
the heater band.
An alternative to this is a tip with integrated heat cartridges.
Tip with heat conduction jacket
Heat conduction tips are applied in situations of tight mold clearance.
These enable heat distribution until the end of the tip in the immersion area without extra
heating.
(More information under Open machine nozzle, type W)
Position sensor for actuator → process control
A temperature resistant cylinder houses the sensor which detects the position of the
piston ensuring that the nozzle is in an “open“ or „closed“ position.
(More information under Optional Extras for shut-off nozzles)
herzog systems ag
Tel. +41 (0)71 394 19 69
Fax. +41 (0)71 394 19 60
www.herzog-ag.com
info@herzog-ag.com
6
T. D. Version 0.8
Machine shut-off nozzle, type HP
Data sheet - machine needle shut-off nozzle, type HP pneumatically / hydraulically controlled
Operating data
HP0
HP1
HP2
500
1600
3500
bis 50
50 – 120
ab 120
20
50
130
max. contact force (kN)
70
120
180
smallest nozzle orifice (mm) M
at max. injection rate
Ø3
Ø5
Ø8
600 bar
600 bar
600 bar
3
max. injection rate cm / s
based on Polystyrol (PS)
approx. screw diameter (mm)
flow channel cm
3
max. back pressure
 For higher back pressure (melt precompression) or closing against solid melt pressure (physical foaming) please contact us for more
information.
max. injection pressure / temperature
3000 bar / 400°C
3000 bar / 400°C
3000 bar / 400°C
Two-piece tip
Standard dimensions (mm)
Key Description
K
tip length; one-piece
tip length; two-piece
HP0
HP1
HP2
24*, 40**
(60, 80, 100, 130, 160)**
32*, 50**
(80, 100, 130, 160, 190)**
50*, 80**
(100, 130, 160, 190)**
*Standard tip included in base model. **Optional tip dimensions. Other tip dimensions custom manufactured.
M
max. orifice (cylindrical)
N
body length
I
temperature sensor
J
heater band
(manufactured acc. to drawing )
JK
heater band
dimensions
one-piece tip;
two-piece tip;
P
Q
R
pneumatic
hydraulic / water cooling
S
6
8
11
138
176
244
Typ J (FeCuNi)
Typ J (FeCuNi)
Typ J (FeCuNi)
ø60*80 special 600W / 230V
ø80*100 special 1250W / 230V
ø115*140 special
2000W / 230V
Ø26 x 16
Ø35 x K-40
Ø35 x 18
Ø40 x K-55
Ø50 x 30
Ø60 x K-70
70
77
96
51
64
95
G1/8“
G1/4“ / G1/8“
G1/8“
G1/4“ / G1/8“
G1/8“
G1/4“ / G1/4“
84
95
124
Technical modifications reserved. For orders or enquiries please fill out the Dimension sheet.
herzog systems ag
Tel. +41 (0)71 394 19 69
Fax. +41 (0)71 394 19 60
www.herzog-ag.com
info@herzog-ag.com
7
T. D. Version 0.8
Machine shut-off nozzle, type HP
Dimension Sheet for enquiry
Shut-off nozzle type HP, pneu. / hydr. operated
or order
Company:
Contact person:
Street:
Tel.:
City / Zip:
Fax:
Land:
E-Mail:
Standard dimensions, see Datasheet. Measurements in mm.
Thread length
(incl. centering)
Temperature sensor bore
(thread ø, thread pitch)
Connection thread
(thread ø, thread pitch)
Tip length
(check standard dimensions)
Temperature sensor bore
(ø x depth)
Incl. Heater band
Centering length
Centering ø
Orifice
Tip contour
(radius or angle)
Immersion depth
(screw tip / angle)
Inlet ø
Nozzle size
Actuation
HP0 (up to 500 cm³/s with PS)
pneumatic (integrated)
HP1 (up to 1600 cm³/s with PS)
hydraulic (integrated)
HP2 (up to 3500 cm³/s with PS)
none (machine side)
Screw Ø
Processed material
Options
Temperature sensor - Type J (FeCuNi), Cable length 2m
Yes
Tip with abrasion protection (above 30% fillers)
Yes
Corrosion protection; recommended for additives such as flame retardants
Yes
Customer information:
We need additional information for
requirements which vary from our standard
range e.g. drawing sample.
Our customer services will be pleased to
help you.
Optional Extras:
Filter, active opening, mixer ,GIT (Gas Injection Technology), actuator sensors
Special applications:
Physical foaming, melt pre-compression
If optional extras are required or when processing with the above special applications,
please enter here:
herzog systems ag
Tel. +41 (0)71 394 19 69
Fax. +41 (0)71 394 19 60
www.herzog-ag.com
info@herzog-ag.com
8
T. D. Version 0.8
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