Blown Film Unit 300
A compact unit for blowing,
cooling, take off and wind up
of extruded hoses.
It is suitable for production of
small films used by the food
industry and in the packaging
field where the application of big
production machines is often not
profitable.
application
Production control:
 Monitoring the dispersion performance of compounders
or extruders used in batch production
 Inspection of incoming goods for gels and color distribution
 Inspection in polymer processing
Production:
 Production of small films used by food industry and in the packaging field
Development:
 For control of the maximum polymer extensibility
 To monitor the suitability of polymers or polymer blends in the laboratory
Blown Film Unit 300 with ALR - M station
Combination with MBR Online rheometer to
measure online MFR and Viscosity
Machine Frame:
The machine frame executed
as a stable, movable and fixable
support with a central telescopetype profile system.
Easy installation of all components.
The automatic lifting function
enables the Blown Film Unit to
be easily adjusted to any
take-off height
Lab – extruder with exchangable cylinder
diameter and length ( D= 20 / 30 mm / 1“ )
Blow Film Unit 300 – Göttfert Laboratory extruder
32bit Software running under Windows 2000 and XP
 Trends and Display
 Data base structure with possibility of data
 Free definition of single display
export to Microsoft Excel
trends
 windows for measured
and evaluated parameters
 Shear Viscosity
 Extensional Viscosity
 Correlation for IV
 with PC- Control – Software ROSwin
 Calculation
 Viscosity / Stress /
Extensional Viscosity Curves
 Rheological Model Fits
 First Normal Stress Difference
 with touch srceen operating panel
Lab-Extrusion single screw
Drive:
Laboratory extruder
Extrusiometer
Extrusiometer
2.2 kW
7.5 kW
25-30 kW
Screw diameter:
20 mm
1”
30 mm
45 mm
Screw length [L/D]
20/25
20
20/25
20/25/30
max.screw diameter 30mm
max.screw diameter 30mm
screw diameter 45mm
Dies: rheometer die, round hole die
Downstream equipment: flat film, film blow, tubing device,
filter measuring head, cable sheeting head,
other equipment available
Blow Film Unit 300 - schematic
Deflection rolls
ROSWIN
Tubeless winding
Decoupling
unit
Tubeless
winding
Decoupling unit
Forcetransducer
transducer
Force
software
Blow Film Unit 300 - Blow Film Head / Blow Film Die
Standard dies
30 mm - 50 mm - 60 mm
- other diameter and on request -
Blown Film Head:
 The blown head / blown film die is attached to the laboratory
means of a deflection head.
 The long orifice land ensures good homogenization and
conveyance to the die outlet.
Applications for Polyethylen
-1 x mandrel D = 50 mm
-1 x orifice D = 51,0 mm =
> gap width of 0.50 mm -> LDPE
-1 x orifice D = 51.5 mm =
> gap width of 0.75 mm -> HDPE
-1 x orifice D = 52,0 mm =
> gap width of 1.0 mm -> HDPE
-1 x orifice D = 52.4 mm =
> gap width of 1.2 mm -> LLDPE
-1 x orifice D = 53,0 mm =
> gap width of 1.5 mm -> LLDPE
Blown Film Unit 300 - dual lip cooling ring
The blow cooling ring operated at two blow levels
•
even and sufficient distribution of cooling air
•
very narrow tolerances in film thickness
1
2
3
4
6
7
Basic Body
Cover disc
Air conveyance plate
Distance sleeve
Air guiding ring
Thread insert
8
9
13
15
17
18
Lower Lever
Upper Lever
Connection neck
Insulation Ring
entring Ring
Fixing block
fine adjustment
of the two gaps
Blown Film Unit 300 - Option cooling of cooling air
• The additional cooling of the cooling air is
needed for the production of high
transparency films
Display for set and
actual temperature
Temperature range -0 - + 40°C
• Additional automatic Haze measurement
for QC is available
Blow film unit 300 - take off unit / windig motor
Take-off speed 0.1 - 50 m / min
Maximum winding
diameter 600 mm
Roll width:
320mm
Core-free winding up Flattening width max. 300 mm
Blow Film Unit 300
- Decoupling system
Decoupling system with
adjustable traction force of
0-50 N
Force transducer
Blow Film Unit 300 – Film control system
• inspection of surfaces.
• quality control of transparent
materials such as films, glass
acrylic glass as well.
• detect fisheyes, blackspots, holes
and other inhomogeneities in 10
different class sizes from 5 µm and
upwards.
• lighting unit and high-speed linesensor connected to a high
performance image processing
computer
Blow Film Unit 300 - tempered nip roll
 Nid roll tempered
with water or heat
transfer oil
pressure up to 6 bar
Temperature range
– 30°C - + 150°C
Rubber nip roll
 a strong circulation chiller byside
ensure a precise and constant cooling of
take off rolls or blow film
Blow Film Unit 300 blow support with central adjustment
Blow Film Unit 300 – Features
Modular system:
 It's easy to add options and / or design it to a custom system.
Control:
User friendly control panel:
 Clear arrangement of all control modules
and displays
 Build in SPS control with adjustable parameter
 Error diagnosis
 Central alarm output makes it easy to handle
Decoupling arrangement:
 Isolates the forces of the pull off motor and enables the user to set a force
of
0- 50 N with a constant force on the film
Blow Film Unit 300 - features / options
Features
Options
- Decoupling system
- Dual-lip cooling ring
- Winding-up reels for
core-free winding up
- Cooling of the cooling air
- Central blow support adjustment
- Film quality testing system
- Roll width
- Film tear monitoring
320 mm
(other on request)
- Die dimensions 30/50/60 mm
(other on request)
- Take-off speed
- Film width measurement controlled
- Haze measurement
0,1-50 m/min
- Gloss measurement
- Controlled
take-off force
max. 50N