PDF-Download - GÜNTHER Hot Runner Technology

Technical data
Order code
All GÜNTHER valve-gate systems offer a wide range of possibilities for meeting optical requirements at the gating.
They prevent stringing on the product and make it possible to reduce the cycle time and keep shear stress low in the plastic being processed.
Valve- gate technology is ideal for producing large shot volumes and wide gating point cross-sections.
The innovative design of the contouring needle guide and the optimised valve-gate needle allow non-contact and low-wear gate closing.
The PM needle guide made of metallurgical powder steel ensures economical and virtually wear-free operation. While closing, the needle is first
centred through a tapered guide until it lowers precisely into the cylindrical guide.
Another advantage is the separation of needle guide and material tube, which means that any necessary change of needle guide is a simple
procedure. Special openings in the clamping plate allow the valve-gate needles to be adjusted individually from the outside.
“ Electromagnet ME 10/UV75”, electric drive for valve-gate systems, chapter 5.
• for electric injection moulding machine
• absolute clean room compatible
Technical data
Type Valve-gate nozzles used as a single nozzle or in a multi cavity system.
Heating element Pressed-in 230 VAC* heating elements, the capacity depends on the nozzle size and length, easy to exchange.
The connections are mounted externally.
T = Voltage 230 VAC *
Only for single nozzle/ pneumatic
S = Steel piston ring
E = Single nozzle, with shaft/ without shaft
H = Nozzle with shaft
M = Nozzle for limited tool space, with shaft
T = Nozzle screwed from parting line, with shaft
N = Valve-gate nozzle
8 = Material tube diameter (Ød)
Material tube-Ø
Needle guide
From Ø3.8 mm to Ø12 mm, depending on nozzle type.
Valve-gate nozzles are equipped with a wear-resistant needle guide made of PM steel. This can be replaced
when necessary.
1 = Model
Order code:
8 N E S T 1 60 LA S R
Nozzle shaft
Nozzle length
Ø15 mm to Ø38 mm (depending on size)
From 40 mm to 250 mm, depending on nozzle type. >250 mm on request.
60 = Nozzle length (L)
Thermocouple
Thermo connection
Measuring point at the gate.
Fixed or pluggable with flexible cable.
LA =
LAZ =
PM needle guide
Power receptacle
Pitch center
Part weight
Operating pressure
Fixed or pluggable with flexible cable.
Starting at 22.5 mm (nozzle is reduced to size "W"),

Notes
PM needle guide
1 Heat expansion gap “K”
The "K" dimension required for the heat expansion must be ensured
by grinding the titanium ring (5 mm)! The heat expansion
gap is calculated by determining the difference between the
nozzle (position of the titanium ring in the head of the nozzle)
and the height of the mould (position of the centring ring)
when assembled.
* T specifies the difference between the processing temperature
and the mould temperature!
Nozzle type NEST, NEST1
Typ
5,
6, 8
10, 12
T(°C)* 100 150 200 250 300 350
K (mm)
K (mm)
0.09
0.11
0.16
0.19
0.23
0.26
0.29
0.33
The “K” dimensions allow for 0.03 mm pretensioning!
2
3
4
5
6
Recess for the M5 screws of the nozzle head.
If you have any questions please call our technical
consulting at +49 (0) 6451 - 50 08 0.
0.36
0.41
0.42
0.48
Power and thermo connection may be bent only once in this area.
Minimum bending radius R8.
The cable channel layout is determined by the pitch center and
location.
Measurement L +0.02 refers to the gate diameter.
If the valve gate nozzle is fitted with the nominal length, the
needle projects 0.2 mm into the part.
Please note
1. Positive sealing
There is no positive sealing between the nozzles and the
manifold when the hot runner system is cold. The system is
sealed when the operating temperature is reached.
2. Hot runner nozzle
a. In case of limited installation dimensions, the nozzle
head can be flattened to fit the dimension W when using
the following nozzle types: NHT, NHT1, NMT, NTT2
b. The nozzle type NMT, NTT2 hot runner nozzles are not
screwed to the manifold .
c. Disassemble the nozzle out of the cavity plate please
use a nozzle extractor tool, chapter 8.
3. Gate diameter
The gate diameter D depends on the material used, part weight
and nozzle diameter.
4. Pitch center
a. The minimum pitch center depends on the nozzle type.
If the nozzle heads are close together than a support piece
is not necessary.
b. Please note the dimensions of the needle actuation.
5. High temperature application
Please call our technical consulting if you have questions about
high temperature applications >320°C.
6. Dimensions and tolerances
Dimensions and tolerances given refer to the mold.
7. Heat expansion gap "K”
Please see chapter 4 (yellow page) for the heat expansion gap
dimension “K”.
8. Maximum tightening torque
Threads
M4
M5
M6
M8
M10
M12
M16
Materialtube
Ø
mm
Property class
10.9 12.9
3.8 Nm
8.0 Nm
13.0 Nm
34.0 Nm
68.0 Nm
117.0 Nm
285.0 Nm
9. Technical information, chapter 1.4.
4.6 Nm
9.5 Nm
16.0 Nm
39.6 Nm
80.0 Nm
137.0 Nm
333.0 Nm
10. NEST, NEST1 Single valve-gate nozzle
Caution! When assembling / dismantling the needle holder (A/F 10),
care must be taken not todeform the steel piston rings. Use the flat
of the piston!
It is essential to put the metal o-ring back in after replacing the
disk package.
The piston and/or the steel piston rings must be greased again
before assembly (GÜNTHER recommends Klüber paste
UH 196-402 [NSF registered]).
It is essential to ensure that the steel piston rings have been
inserted correctly. The rings have a marking (XXX) on the faces surface,
indicating the side that must point towards the pressurised side.
When maintenance work is being done, the screws
(property class 12.9) which attach the upper section must be in a
heated state (300°C) when they are tightened.
5, 6NEST....
8NEST1...
10, 12NEST1...
Inlet/ outlet pipes for activating the needle
It is preferable to use channels with diameters of 6 mm and a
minimum length of 200 mm. The inlet and outlet lines must be
placed in the temperature-controlled mould plate in order to
prevent the compressed air overheating.The temperature should
be between 40°C and 70°C.
If the mould temperatures exceed the thermal stress capability of
the pneumatic valves, a separately cooled manifold must be
installed. The mechanics of the needle drive and the valve-gate
nozzle are absolutely capable of withstanding high temperatures.
11. Gate diameter Ø
Valveneedle
Ø mm
2
3
3
3
5
4
5
6
8
10, 12
M5
M6
M8
Gate diameter Ø mm
9.5 Nm
16.0 Nm
39.6 Nm
Tolerance zone for the nozzle seat in the cavity plate:
H6
Dimensions Ø to 3 =
> 3....6 =
H7
Dimensions Ø > 10...18 =
0.8 1.0 1.2 1.4 1.6 2.0 2.5 3.0 3.5 4.0
Gate diameter-Ø: standard, delivery time upon request
> 18...30 =
+0.006
0
+0.008
0
+0.018
0
+0.021
0
> 30...50 = +0.025 0
Order code
Following parts must be ordered separately:.
1. CMLK thermoplug
for nozzle type NEST, NHT
2. CMT power receptacle
for nozzle type NEST, NHT
Please note:
The mechanic of the single nozzle type NEST/ NEST1 is equipped
with fixed power- and thermo couple connection.
PM needle guide LA Cut-out in the gate area
7
PM needle guide LA
of metallurgical powder steel
The needle guide can be easily chan-ged as required. By
replacing the PM needle guide and the needle, the injec-tion gate
diameter can be enlarged or reduced without any re-machining of
the mold nest. The precision of the needle guide allows a virtually
wear-free seal and a clean gate without burrs.
Advantages:
• High longevity due to extreme wear resistance
• Insert exchangeabal
• Short cycle times
• Excellent and vestige-free gating quality
• Very good cosmetic quality
• No need to replace or re-machine mold inserts
• Low shear stress
For more technical information please see the respective nozzle
type page.
PM-needle guide
Valve needle
3. The needle is not a component of the valve-gate nozzle because
the needle length depends on the nozzle length, actuation
mechanism and manifold assembly.
4. Slide extractor tool to exchange the needle guide, chapter 8.
5. Steel piston ring, to exchange, chapter 8.
Nozzle size 4-6 (material tube-Ø mm)
R0.4
sharp edged
deburred
Nozzle size
4
5
6
Nozzle size 8-12 (material tube-Ø mm)
R
R1
sharp edged
deburred
Nozzle size
8
10
12
R
Angle (Wi)
ØS5 -0.1
ØS5
4.1
5.0
5.0
0.4
0.8
0.8
0.4
0.4
60°
Ø3.5
R1
0.4
1.2
1.2
A
H7
ØS6 -0.1
90°
ØS5 -0.1
60°
H7
ØS7
A
ØS6 -0.1
ØS6
3.9
4.6
4.6
ØS5
7.4
10.8
10.8
ØS6
7.0
10.4
10.4
Ø0.01 A
t6
1.85
1.25
1.25
Ø0.01 A
ØS7
5.0
6.5
6.5
0.01 A
t5
t6
1 +0.1
t6
t5 ±0.05
1.20
1.32
1.32
0.4
3.2 -0.02
Angle (Wi)
60°
90°
90°
0.01 A
0.4
t6
t7 -0.02
2.2
2.6
2.6
5
5
t7
4.2
4.8
4.8
2.3. 4
www.guenther-hotrunner.com
Subject to technical changes 3/13

PM needle guide
PM needle guide LA
Special design with titanium ring
Cut-out in the gate area
Nozzle size 4-6 (material tube-Ø mm)
Ø0.01 A
R0.4
R0.4
R0.2
sharp edged
deburred
0.4
H7
ØS5
0.4
60°
Ø3.5
H7
A
30°
Ø0.01 A
1 +0.1
0.01 A
1.4 -0.02 t5
3.2
5
7
PM needle guide LA
Special design with titanium ring
The thermal insulation of the PM needle
guide provided by a titanium ring allows
a much wider range of applications of
the valve gate nozzle with the following
plastics
•
•
•
•
Polyamides (PA4.6, PA6.6, HTN)
Thermoplastic polyesters
(PBT, PET)
Liquid crystalline polymer (LCP)
Polyetheretherketone (PEEK)
Nozzle size
4
5
6
ØS5
6.5
7.0
7.0
t5
1.4
1.5
1.5
Nozzle size 8-12 (material tube-Ø mm)
Ø0.01 A
H7
ØS5
A
30°
0.01 A
5
R0.4
R0.2
R
sharp edged
deburred
0.4
0.4
60°
H7
ØS6
Ø0.01 A
t5 ±0.05
t6 -0.02 t7
t8
Nozzle size
R
ØS5
ØS6
t5
t6
t7
t8
8
0.4
10.0
5.0
1.20
2.4
1.5
4.2
10
1.2
14.5
6.5
1.32
2.2
2.3
4.8
12
1.2
14.5
6.5
1.32
2.2
2.3
4.8
Titanium ring
PM needle guide
Valve needle
www.guenther-hotrunner.com
11/12 Subject to technical changes
2.3. 6

PM needle guide
PM needle guide LAZ
Cut-out in the gate area
Nozzle size 4-6 (material tube-Ø mm)
R0.4
sharp edged
deburred
Nozzle size
4
5
6
8
Angle (Wi)
ØS5 -0.1
0.4
ØS5
4.1
5.0
5.0
7.4
70°
H6
ØS7
ØS6 -0.1
A
ØS6
3.9
4.6
4.6
7.0
t5
Ø0.01 A
0.58
0.58
0.58
0.63
t7
0.01 A
+0.05
t5
± 0.05
t6
3.2
3.2
3.2
4.2
0.4
t7 -0.02
Angle (Wi)
60°
90°
90°
90°
5
7
PM needle guide LAZ
of pulvermetalurgical steel
The needle guide can be easily changed
as required. By replacing the PM
needle guide and the needle, the injection
gate diameter can be enlarged or
reduced without any re-machining of
the mold nest. The precision of the
needle guide allows a virtually wearfree
seal and a clean gate without
burrs.
The LAZ needle guide is tapered in
form with a smaller contact area,
which reduces the imprint made.
This version is suitable for molding
parts with a small wall thickness, or
for parts which contours do not
permit any larger imprint.
Advantages:
• High longevity due to extreme wear
resistance
• Insert exchangeable
• Short cycle times
• Excellent and vestige-free gating
quality
• Very good cosmetic quality
• No need to replace or re-machine
mold inserts
• Low shear stress
Assembly
dimensions
ØD
0.8
Nozzle
size
ØS7
2.2
4
t6
1.41
5
t6
0.91
6 8
t6 t6
0.91 -
1.0
2.4
1.55
1.05
1.05
-
1.2
2.6
1.70
1.20
1.20
-
1.4
2.8
1.84
1.34
1.34
-
1.6
3.0
-
-
1.48
-
2.0
3.5
-
-
-
1.07
2.5
4.0
-
-
-
1.43
PM needle guide
Valve needle
2.3. 7
www.guenther-hotrunner.com
Subject to technical changes 11/12

Nozzle/ material compatibility
Nozzle type
NEST
Page 2.3. 20
NEST1
Page 2.3. 20/22
NHT
Page 2.3. 60
NHT1
Page 2.3. 65
5
6
8
10
12
4
5
6
8
10
12
ABS
LCP 2)
PA 4.6
PA 6
PA 6.6
3) 4)
PA 6.6+V0+GF
PA 6.6+V0+ W
1)
PA 11
PA 12
PA 6+V0+W 1)
PBT
PC
PE
PBT+V0
PBT+V0+W 1)
PEEK 2)
PEI
PES
PET
PMMA
PP
PPA
PPO
PPS 2)
PPSU
PS
PSU
POM
4)
Homo
POM Copolimer
PVC, soft
PVC, hard
SAN
TPE 5)
TPU
Nozzle type
E
H
M
T
= Single-nozzle with shaft
= screwed to the manifold with shaft
= for limited tool space, not screwed to the
manifold with shaft
= screwed from parting line, with shaft
The nozzle size depends on the shot weight, taking
into consideration pressure drop and dwell time. To
confirm material/nozzle compatibility please contact
our technical consulting department.
1) Heatstabilized, please contact us
2) Only nozzles for high temperature applications, no
standard version
3) Up to a shot weight of approx. 5 g per nozzle a titanium
ring should be inserted under the nozzle head (nozzle
type NMT).
4) For applications of the nozzle types NHT1/ NMT with
long cycle times the use of a titanium ring under the
nozzle head is recommended.
5) For the processing of TPE in multiple cavity tools it is
advisable to use valve-gate systems.
NMT
Page 2.3. 100
4
5
6
3) 3) 3) 3) 3) 3)
3) 3) 3) 3)
3) 3) 3) 3) 3)
3) 3) 3)
3) 3) 3) 3) 3)
PBT
PA 12
PA 11
NTT2
Page 2.3. 140
4
5
6
PMMA
PET
PES
PEI
PEEK 2)
PE
PC
PBT+V0+W 1)
PBT+V0
TPU
TPE
SAN
PVC, hard
PVC, soft
PSU
PS
PPSU
PPS 2)
PPO
PPA
PP
PA 6
PA 4.6
LCP 2)
PA 6.6
4)
PA 6+V0+W 1)
Suitable Limited suitability On request
ABS
PA 6.6+V0+
1)
PA 6.6+V0+GF
POM Copolimer
POM
4)
Homo
W
www.guenther-hotrunner.com
11/12 Subject to technical changes
2.3. 8

Valve-gate nozzle type
type
5-6NEST,
pneumatic
8NEST1,
pneumatic
Nadelverschlussdüsen, Einzeldüse mit Schaft verschraubt von Trennebene, mit Schaft.
Assembly
141.13
5
136.03
5 +0.1
0.5x45°
B
0.25x45°
Detail X
136.03
2.5 - 3 mm revolving
1
K
A
Detail X
ØS1 H7
View B-B: Bore hole/thread in the cavity plate
12.3 H7 11 tief
20°
20°
10.74 ±0.01
29.51 ±0.,01
Insulation ring
Clamping
plate
Frame
plate
Cavity plate
Ø56
B
A
View A-A: Frame plate
7
ca. 102
R2
90°
+0.4
ØS2
R2
6.3
ØS3 +0.1
ØS H7
5)
Power- and thermoconnections
shown
rotated 90°et
Confer with technical consulting
6.3
A
1.6
0.4
45°
min. 10
V -0.2
Ø0.02 A
min. t1
5
A
28
80
Order code
Example: Single valve-gate nozzle
6NEST50/LA-0.8/ R 40
6 = Material tube Ø d 6 mm,
NEST = Single valve-gate nozzle,
with steel piston ring,
50 = Lenght mm,
LA = PM needle guide,
0.8 = Gate Ø mm,
R 40 = Nozzle head radius
Please indicate material type, article, part
weight, kind of gating, gate-Ø and machine
nozzle radius/angle in your order.
Notes
Actuation medium: pneumatic
Pneumatic tube, inside diameter min. 6 mm
Pneumatic valve size min. 750 L/min.
Power and thermo conntections shown
rotated 90°
1)
2)
3)
4)
1
Fixed power connection
incl. 2 m flexible cable
Fixed thermo connection
incl. 2 mflexible cabel
Power receptacle CMT
Thermoplug CMLK
The position of the nozzle can be secured by
the flute in the housing (anti-twist protection).
If you have any questions regarding the
altered piping for the driving medium, we
recommend that you consult the technical
consulting.
Recommendation: for better cooling, the air
supply lines provided in the mould should be
as long as possible.
For an optimum thermal separation between
the nozzle and the mould, use the (blue)
insulation ring.
The needles are adjusted precisely by means
of shims (0.1 mm) in the piston.
The nozzle is actuated with 2 control circuits.
t1
R/W
5)
The dimension can be extended as
required to achieve a larger fitting
diameter ØS H7.
The construction of the machine nozzle
determines which type of connecting
piece should be use
straight, R (radius) R 13, (R ½”), R 15,
R 20 (R ¾”) R 40
W (angle) 90°, 120
Screw centring with at least 6x M10
(12.9) (DIN EN ISO 4762) screws, with
due consideration to lift forces.
.... as well as further technical notes
on the “yellow page”.
Dimensions
Nozzle type
5NEST
6NEST
8NEST1
Nozzle (mm)
Ød
4.8
6.0
7.5
ØS
22
26
26
23
27
27
Assembly (mm)
ØS1 ØS2 ØS3 t1 V
22.5
26.5
26.5
10.6
10.6
12.6
32
35
35
Detail Radius R/
Angle W
9.0
11.0
10.9
L 141.13
38
6
Single valve-gate nozzle
with steel piston ring, with shaft
Valve
needle
7
Part edge
4
137.13
Delivery time
Nozzle type
5NEST
6NEST
8NEST1
Ø82 +1
Ø39
Detail Radius R/ Angle W
R
Ød
ØS1
ØS
Ø6.5
4
Nozzle length L (mm)
W
40 50 60 80 100 120 150 200 250
= short delivery time, = delivery time upon request
3
1)
2)
Nozzle size 5 + 6NEST
4) 3)
Nozzle size 8NEST1
2) 1)
Ø6.5
N E ST/...1 HK-S I
NHT HK-S II
NTT2 NMT NHT1
www.guenther-hotrunner.com
11/12 Subject to technical changes
2.3. 20

Valve-gate nozzle type 10-12NEST1,
pneumatic
Nadelverschlussdüsen, verschraubt von Trennebene, mit Schaft.
Assembly
154.88
149.78
Detail X
Clampin
plate
A
3)
Order code
Example: Single valve-gate nozzle
10NEST1-100/LA-3.0/ R 40
10 = Material tube Ø d 10 mm,
NEST1 = Single valve-gate nozzle,
with steel piston ring,
100 = Lenght mm,
LA = PM needle guide,
3.0 = Gate Ø mm,
R 40 = Nozzle head radius
Please indicate material type, article, part
weight, kind of gating, gate-Ø and machine
nozzle radius/angle in your order.
Notes
Detail Radius R/
Angle W
154.88
Single valve-gate nozzle
with steel piston ring, with shaft
Ø100.5 +1
Ø39
Ød
3
1)
N E ST/...1 HK-S I
5
0.5x45°
10 +0.1
B
0.25x45° 0,25x45°
A
ØS1 H7
View B-B: Bore hole/thread in the cavity plate
12.3 H7 11 depth
15°
15°
8.22 ±0.01
Detail X
149.78
2.5 - 3 mm revolving
1
K
Insulation ring
30.67 ±0.01
Frame
plate
Cavity plate
Ø56
B
View A-A: Frame plate
7
R2
ca. 122
+0.4
ØS2
R0.4
90°
A
20 +0.1
ØS
H7
Power- and thermoconnections
shown
rotated 90°et
Confer with technical consulting
6.3
6.3
1.6
1.6
min. 10
45°
V -0.2
min. t1
5
Ø0.02 A
A
17 11
80
Actuation medium: pneumatic
Pneumatic tube, inside diameter min. 6 mm
Pneumatic valve size min. 750 L/min.
Power and thermo conntections shown
rotated 90°
1)
2)
1
Dimensions
Nozzle type
NEST1
10
12
Fixed power connection
incl. 2 m flexible cable
Fixed thrmo connection
incl. 2 m flexible cable
The position of the nozzle can be secured by
the flute in the housing (anti-twist protection).
If you have any questions regarding the
altered piping for the driving medium, we
recommend that you consult the technical
consulting.
Recommendation: for better cooling, the air
supply lines provided in the mould should be
as long as possible.
For an optimum thermal separation between
the nozzle and the mould, use the (blue)
insulation ring.
The needles are adjusted precisely by means
of shims (0.1 mm) in the piston.
The nozzle is actuated with 2 control circuits.
t1
R/W
3)
The dimension can be extended as
required to achieve a larger fitting
diameter ØS H7.
The construction of the machine nozzle
determines which type of connecting
piece should be use
straight, R (radius) R 13, (R ½”), R 15,
R 20 (R ¾”) R 40
W (angle) 90°, 120
Screw centring with at least 6x M10
(12.9) (DIN EN ISO 4762) screws,
with due consideration to lift forces.
.... as well as further technical notes
on the “yellow page”.
Nozzle (mm)
Ød
10
12
ØS
32
38
33
39
Assembly (mm)
ØS1 ØS2 t1
32.5
38.5
38
39
V
13.9
15.3
L
6
38
Part edge
Delivery time
Nozzle type
NEST1
10
12
ØS1
ØS
Detail Radius R/ Angle W
4
150.88
R
7
3
Valve needle
8
8
167 ±15
7
Fixed thermo
connection incl.
2 m flexible cable
Ø10
4
8
W
Nozzle lengt L (mm)
9
10
40 50 60 80 100 120 150 200 250
2)
Ø10
12
Fixed power
connection incl.
2 m flexible cable
NHT HK-S II
NTT2 NMT NHT1
= short delivery time, = delivery time upon request
www.guenther-hotrunner.com
11/12 Subject to technical changes
2.3. 22