Herzog HP Installation and maintenance instructions

HP-Nozzle, Installation & Service Instructions
herzog systems ag Tel. [phone]
Fax. [phone] [e-mail] Seite 1 on 10
Version 06/2022
Machine needle shut-off nozzle type HP
pneumatically or hydraulically controlled
Chapter Page
Safety instructions ...................................................................................................... 2
Installation instructions ............................................................................................... 3
- Installation steps ................................................................................................. 3
Initial operation ........................................................................................................... 6
Ideal nozzle actuation stages ..................................................................................... 6
Ser ice instructions .................................................................................................... 7
- Disassembly ....................................................................................................... 7
- Recommended disassembly tool ........................................................................ 8
- Cleaning instructions ........................................................................................... 8
Assembly .................................................................................................................... 9
Parts subject to wear / ordering spare parts ............................................................... 10
Index of contents

HP-Nozzle, Installation & Service Instructions
herzog systems ag Tel. [phone]
Fax. [phone] [e-mail] Seite 2 on 10
Version 06/2022
Please pay attention to the follo ing safety instructions and precautions
Safety instructions
This symbol indicates explanations about important matters.
Failure to read these or false handling could result in injury or damage.
Handling
 Installation and ser icing to be only carried out by suitable personnel according to
the installation and ser ice instructions.
 Nozzle can become extremely hot. Full face protection and heat resistant glo es
must be worn.
Damage precaution
 Nozzle is only to be used for injection molding purposes.
 Torques on screws and threaded parts must be adhered to.
 Maximum injection rate / temperature: 3000 bar at 400°C.
 Shut-off operation according to Melt pressure / time graph.
 Ne er heat steel parts o er 520°C.
 The actuator is designed for temperatures up to 180°C.
 No adjustment or manipulation when nozzle is in operation.
 Take care that no foreign bodies enter the working parts of the nozzle.
 Do not drop the nozzle or exert it to unnecessary forces.
 Noise emissions from the nozzle do not exceed 70 dB(A).
Explosion danger
 Some plastics produce gases if they stay for a longer time in a heated en ironment.
There is a risk that the gas may escape explosi ely through the nozzle orifice.
Keep this manual in a convenient place for future reference.

HP-Nozzle, Installation & Service Instructions
herzog systems ag Tel. [phone]
Fax. [phone] [e-mail] Seite 3 on 10
Version 06/2022
B)
A)
1. Loosen and respecti ely remo e heater band screws
2. Take off heater band
Installation instructions
2.
1.
1. Loosen screws
2. Loosen tip
3. Screw the adapter out
1.
3.
Note: Loosen the screws by four rotations.
4 x 360°
Legend:
with Hand inspection
smear with high temperature lubricant temperature equalisation
tool
Read safety instructions!
Note:
Nozzle is deli ered pre-assembled. The following instructions are for installation on the
machine. For easier handling remo e the actuator.
Tools required:
Hexagonal wrench, allen key, ring spanner, socket wrench, pliers, punch.
See chapter Assembly for tool sizes and torques.
Installation steps A) - G)
2.

HP-Nozzle, Installation & Service Instructions
herzog systems ag Tel. [phone]
Fax. [phone] [e-mail] Seite 4 on 10
Version 06/2022
C)
3.
1. 2.
1. Check surfaces and threads
2. Smear adapter thread with high temperature lubricant
3. Mount adapter; await temperature equalisation and tighten acc.
to machine handbook
4.
4. Tighten two screws crosswise
crosswise
D)
1. Screw nozzle onto the adapter until contact
2. Screw in tip further until contact
3. Loosen the two pre iously tightened screws by four rotations.
4. Screw in tip approx. 180° further
3.
1.
5. Align: Screw nozzle clock ise further onto the machine
Note: min. ¼ rotation
5.
Align nozzle
Rotate clockwise
E)
1. Tighten two crosswise screws
2. Check gap between body and adapter ring max. 2.5 mm
1.
2.
ll = min. 0.5 mm to max. 2.5 mm ll = min. 0 mm to max. 1 mm
Adapter ring gap nonexistent: Loosen the two screws
and screw the nozzle 360° clockwise.
2. + 4.
tip ring adapter ring

HP-Nozzle, Installation & Service Instructions
herzog systems ag Tel. [phone]
Fax. [phone] [e-mail] Seite 5 on 10
Version 06/2022
F)
Torque HP0 HP1 HP2
1. pass handtight handtight handtight
2. pass 7 Nm 15 Nm 35 Nm
3. pass 10 Nm 22 Nm 45 Nm
4. pass 12 Nm 25 Nm 50 Nm
1. Tighten all screws in a crosswise fashion crosswise
1.
1. Mount heater band (1a) and temperature sensor (1b)
2. Attach flexible actuator pipe connections
Note: The actuator can be rotated 180° to suit
3. Tighten tip ith torque according to chapter Assembly*
* Tip is already tight when mounting step E) has been correctly obser ed and the
required gap exists between tip-ring and the nozzle body
G) 1b.
1a.
3.
2.

HP-Nozzle, Installation & Service Instructions
herzog systems ag Tel. [phone]
Fax. [phone] [e-mail] Seite 6 on 10
Version 06/2022
When machine is powered off or idle for a long period:
 Purge processed material from nozzle
 Open nozzle
 Reduce nozzle temperature
Initial operation
Leakage release area
approx. 1cm3 per day
Read safety instructions!
1. Bring nozzle to operating temperature
2. Only for first operation: tighten 8 body screws and heater band screws to maximum
recommended torques
3. Make sure that polymer is completely melted
4. Purge heated melt. This follows after extrusion at low speed (time ca. 25 - 30s) or
through injecting out at three to fi e times injection time
Actuator: Operational data according to engra ing on cylinder.
Leakage: Between needle and guide there is a melt film which pre ents the needle from
blocking. The melt film will be continuously renewed and will e entually leak out of the
nozzle in the area indicated beside.
This melt release is completely normal, especially when low iscosity material is
combined with high back pressure. The material will not affect the function of the
nozzle as the actuator piston stroke and le er mo ement respecti ely keeps the area
clear. If required any gathered residual material can be manually cleaned away.
While injecting no leakage should emit in this area and the nozzle is completely sealed.
Machine do ntime
Actuating nozzle at stages indicated in the graph helps increase longe ity of wear parts.
Melt pressure / time graph:
Nozzle actuation stages
Nozzle open Nozzle closed
Time
Back pressure
Injection
pressure
Actuate nozzle open Actuate nozzle close
Melt pressure
Dosing start
Injection start
Holding pressure
Ideally at 10 to 50bar
melt pressure
Ideally when pressure
is lowest

HP-Nozzle, Installation & Service Instructions
herzog systems ag Tel. [phone]
Fax. [phone] [e-mail] Seite 7 on 10
Version 06/2022
Service instructions
Read safety and cleaning instructions!
Assembly Note: Grease all threads ith high temperature paste!
4.
2.
5.
A)
Disassembly A) - B)
3.
360° x 2
1.
Removing the nozzle from the machine:
1. Heat nozzle to operating temperature
2. Remo e actuator (Actuator ser ice information a ailable seperately in documentation
Actuator. See www.herzog-ag.com)
3. Remo e temperature sensor
4. Remo e heater band
5. Loosen screws (t o rotations)
B)
1a. 1b.
2.* 3a. 3b. 4a. 4b.
1. Remo e tip (1a.), Needle (1b.) and holding pin (1c.)
2. Remo e bushing. *If you ha e difficulty remo ing the bushing we recommend using
our disassembly tool, see Recommended disassembly tool
3. Remo e screws (3a.) and nozzle body (3b.)
4. Remo e bracket (4a.) and adapter (4b.)
5. Strike out the le er bolt using a punch (5a.) and remo e le er (5b.)
1c. 5b. 5a.

HP-Nozzle, Installation & Service Instructions
herzog systems ag Tel. [phone]
Fax. [phone] [e-mail] Seite 8 on 10
Version 06/2022
Recommended disassembly tool
Option:
Our disassembly tool eases the needle bushing remo al.
1. Holding pin must be remo ed or min. 5 mm screwed out
2. Position remo al nut
3. Screw in remo al screw until the bushing is remo ed
Assembly Note:
Bushing bore must be aligned with holding pin. Tighten the holding pin with moderate
strenght (ca. 8Nm).
The end position of the holding pin is approx. 0.5
mm away from the body unit.
More information at www.herzog-ag.com
2.
3.
lubricate
1.
While the nozzle is still installed, clean as far as possible in a heated state and finally
disassemble completely and clean indi idual parts.
Plastics such as; LCP or PPS burn away when the nozzle is heated in an o en for tow
hours at 500°C.
Ne er heat steel parts abo e 500°C!
Clean pneumatic or hydraulic actuator separately with max. 150°C!
A oid kinking the heater band and sensor cables!
Help tools for cleaning:
 Sand fluidized bed
 Glass bead blasting
 Cleaning o en
 Gas burner
 Wire brush
 Steel wool
Before reassembly: check all parts for damage or wear.
Profit from our cleaning ser ice. The nozzle is disassembled, checked and repaired if
necessary after customer appro al.
Cleaning instructions

HP-Nozzle, Installation & Service Instructions
herzog systems ag Tel. [phone]
Fax. [phone] [e-mail] Seite 9 on 10
Version 06/2022
Assemble according to the numerical order.
Assembly
Pos. Qty. Description Tool size (Torque)
HP0 HP1
Metric (Nm) Imperial (lbs/ft) Metric (Nm) Imperial (lbs/ft) Metric (Nm) Imperial (lbs/ft)
1 1 Body - - - - - -
2 1 Needle bushing - - - - - -
3 1 Holding pin SW5 (3) 3/16 (2.2) SW5 (3) 3/16 (2.2) SW8 (5) 5/16 (3.7)
4 1 Le er - - - - - -
5 1 Pi ot bolt - - - - - -
6 12 Screws SW5 (12) 3/16 (8.8) SW6 (25) 1/4 (18.4) SW10 (50) 13/32 (3 .8)
7 1 Bracket / Adapter ring - - - - - -
8 1 Adapter (torque acc. to
machine handbook) SW36 1 7/16 SW46 - 60 1 13/16 - 2 3/8 SW65 - 80 2 6/16 - 3 1/8
9 1 Needle - - - - - -
10 1 Tip SW27 (220) 1 1/16 (1 2) SW36 (500) 1 7/16 (3 8) SW55 (1200) 2 3/16 (885)
10.1 1 Base for two-piece tip SW36 (220) 1 7/16 (220) SW41 (500) 1 5/8 (3 8) SW65 (1200) 2 9/16 (885)
10.2 1 Cap for two-piece tip SW27 (120) 1 1/16 (88.5) SW32 (200) 1 1/4 (147) SW41 ( 00) 1 5/8 (442)
11 1 Actuator - - - - - -
12 2 Bolt screws SW13 (12) 1/2 (8.8) SW17 (30) 11/16 (22.1) SW17 (30) 11/16 (22.1)
13 1 Bolt - - - - - -
14 1 Splint - - - - - -
15 1 Heater band - - - - - -
16 2 Heater band screws SW4 5/32 SW4 5/32 SW4 5/32
17 1 Temperature sensor SW14 9/16 SW14 9/16 SW14 9/16
HP2
Note: Grease all threads with high temperature paste! See also chapter: Disassembly.

HP-Nozzle, Installation & Service Instructions
herzog systems ag Tel. [phone]
Fax. [phone] [e-mail] Seite 10 on 10
Version 06/2022
Parts subject to ear / ordering spare parts
Your contact information:
Company
Street
City / Zip
Contact
Tel. / Fax
E-Mail
Lasered nozzle identity no.: please insert here
Quantity Part (for part name, see chapter Assembly)
Send to:
herzog systems ag
CH-9230 Flawil / Switzerland
Tel. [phone] / Fax [phone]
www.herzog-ag.com / [email protected]