Herzog A Series Manual

Nozzle typ A, Installation and Service Instructions
herzog systems ag
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Version 06/2022
Machine shut-off nozzle type A(S)
spring operated
Applications:
Thermoplastics (not applicable for PVC)
Shut-off mechanism:
Operated with one axial high performance spring
Chapter age
Safety instructions ..................................................................................................... 2
Installation instructions .............................................................................................. 3
Initial operation .......................................................................................................... 4
Cleaning instructions ................................................................................................. 4
Assembly .................................................................................................................... 5
Spare part order form ................................................................................................. 6
Index

Nozzle typ A, Installation and Service Instructions
herzog systems ag
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Seite 2 on 6
Version 06/2022
lease pay attention to the following 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
 Do not drop the nozzle or exert it to unnecessary forces.
 Take care that no foreign bodies enter the working parts of the nozzle.
 No adjustment or manipulation when nozzle is in operation.
 Ne er heat steel parts o er 500°C.
 Nozzle is only to be used for injection molding purposes.
Operational notes
 Maximum injection rate / temperature: 2000 bar at 350°C.
 Torques on screws and threaded parts must be adhered to.
 Noise emisions 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.

Nozzle typ A, Installation and Service Instructions
herzog systems ag
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Fax. [phone] [e-mail]
Seite 3 on 6
Version 06/2022
Installation instructions
Read safety instructions!
Note:
Nozzle is deli ered pre-assembled (without optional heater band and temperature
sensor). The following instructions are for installation on the machine.
Tools required:
Hexagonal wrench, Allen key, ring spanner.
Tighten all screws to correct torque. See chapter Assembly for tool sizes and torques.
Installation steps A) - B)
A)
1. Check surfaces and grease threads with high temperature paste.
2. Pre-install heater band and sensor.
1.
B)
2.
1. 2.
1. Await temperature equalization.
2. Tighten (See chapter Assembly for tool sizes and torques).
Legend:
With hand Inspection
Grease with high temperature paste Await temperature equalization
Tool

Nozzle typ A, Installation and Service Instructions
herzog systems ag
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Seite 4 on 6
Version 06/2022
Read safety instructions!
Initial operation:
1. Bring nozzle up to operating temperature
2. For first installation or after assembly: Retighten screws, tip and heater band
with maximum torque.
3. Make sure that material is completely melted.
4. Firstly discharge heated material by extrusion at low speed (time ca. 25 - 30 S) or
through injecting out at three to fi e times the rate of injection.
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.
At machine downtimes; reduce the nozzle temperature.
Initial operation
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!
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

Nozzle typ A, Installation and Service Instructions
herzog systems ag
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Seite 5 on 6
Version 06/2022
os. Description Tool / Size Torque
A0 A1.0 / A1.1 A2 A0 A1.0 / A1.1 A2
1 Needle guide - - - - - -
2 Positioning pin - - - -
3 Pressure pin - - - - - -
4 Spring - - - - - -
5 Spring chamber (standard) SW11 SW18 / 19 SW25 20Nm 40 / 40Nm 50Nm
Spring chamber (filter) SW11 SW17 / 19 SW24 20Nm 40 / 40Nm 50Nm
6 Body - - -
7 Needle - - - - - -
8 Tip SW19 SW24 / 24 SW41 60Nm 200 / 200Nm 520Nm
9 Heater band SW4 SW4 / 4 SW4 on Hand
10 Temperature sensor SW10 SW10 / 10 SW10 on Hand
Torque according to machine handbook
- -
rocedure
1. Clamp the hexagonal part in a ice. Unscrew the tip
2. Remo e shut-off parts using a punch
3. Insert the shut-off part re ersed back into the body and reinsert positioning pin
4. Use a ring spanner on the three stabilisation extrusions to screw off spring chamber
Assembly

Nozzle typ A, Installation and Service Instructions
herzog systems ag
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Fax. [phone] [e-mail]
Seite 6 on 6
Version 06/2022
Your full contact information please:
Company
Street
Zip/City
Contact
E-Mail
Tel / Fax
Engraved identity Nr. Please enter here
Quantity Part name / no.
Spare part order form
Send to:
herzog systems ag
CH-9230 Flawil / Switzerland
Tel. [phone] / Fax [phone]
www.herzog-ag.com / [email protected]