(
)
Blow Moulding Process
& Barrier Containers
Part 2
D.1
Equipment
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Major process stages
)
• Feeding system for the
granules, regrind and
masterbatches
• Melting and homogenizing
of the plastic in a single
screw extruder
• blowing of the bottle
• cooling of the bottle
• calibration and de-flashing
• leak proof testing
D.2
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Blow moulding
techniques
)
 Extrusion blow moulding
– continuous extrusion
– intermittent extrusion
 Injection blow moulding
 Injection stretch blow
moulding
D.3
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Extrusion Blow Moulding
– Wheel Machines
D.4
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Continuous extrusion
blow moulding 1
)
Line with double station for Max. 24 cavities
D.5
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.6
Blow Moulding Machine
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.7
Blow Moulding Line
Equipment elements
)
-
Feeding system (volumetric, gravimetric, mixing), hopper
-
Extruder: screw, barrel, adaptor
-
(Filter screen-pack, filter changer)
-
Head, parison control, die: mandrel, bushing
-
Parison cutter
-
Blow unit
-
Mould(s)
-
De-flashing unit
-
On-line test unit (holes, top-load)
-
Labelling (glueing, IML), printing (flaming, Corona)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Equipment set-up
)
Die centering
adjustment bolts
Die
Blow pin
Hot knife
cutter
Parison
D.8
Mould
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.9
Equipment set-up
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
( Dosing and mixing units )
D.10
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
( Dosing and mixing units )
D.11
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.12
Blow Moulding Line –
Extruder
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Blow Moulding Line –
Extruder
)
Functions of the extruder:
- Convey the granules in the screw flight
- Compress the solid granule and remove the air
- Melt the granules
- Mix the melt, to make it as homogeneous as possible
- Produce the desired melt temperature
- Produce the desired pressure to have the melt flowing
D.13
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Blow Moulding Line –
Extruder
)
Typical extruder for blow moulding lines
- Normally with grooved barrel
- 3 zone screw or barrier screw with or without mixing elements
D.14
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
)
Screw
Feeding zone
zone
Connection
to the motor
L
Compression
zone
Metering
zone
D
q
D
q
F
A
M
D.15
F
Screw diameter
Flight angle (17.65)
Feeding zone depth
Feeding zone length/D
Metering z. length/D
P
L
P
H
C
N
H
Screw length
Pitch
Metering zone depth
Compression z. depth/D
Screw speed, rpm
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Screw
)
Typical 3-zone screw:
D= 90 mm
L/D= 25
Compression ratio: 2.0 to 2.5
Length feed section: 10D
Length compression section: 6D
Length metering section: 9D
Typical barrier screw with mixing head:
L/D: 20
D.16
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Screw 3
)
Multi-Purpose Barrier Screw
for Grooved Barrels
D.17
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Mixing elements 2
)
Shear & mixing elements
D.18
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Screw 3
)
Multi-Purpose Barrier Screw for Grooved Barrels
D.19
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
)
DISTRIBUTIVE (ananas, Saxton, Dulmage)
They divide and recombine flow streams
DISPERSIVE (UCC; cavity transfer mix, static mixer)
Cutting strains generate the reduction of particles of immiscible components
D.20
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.21
Mixing elements
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.22
Mixing elements 3
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Grooved barrel
)
Grooved zone
Cooling
D.23
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Filters – Screen pack –
Filter Changer
)
old filter
D.24
new filter
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Types of dies
)
- Spiders (PVC)
- Mandrel
- Spyral
D.25
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Mandrel die
)
- Low cost
- Reduced external dimensions
- High precision with annular die gap
- Difficult centering
- Long time needed for color change
- Output depending
D.26
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.27
Standard die
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.28
Multiple die
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.29
Die design
and polymer swell
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.30
Die design
and polymer swell
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.31
Coextrusion dies
for 3 layers
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Coextrusion die for 6
layers and wall structure
D.32
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
State-of-the-art
structure of
multilayer bottles
(
)
2 layers
PE-LD/PE-HD
3 layers
PET/PET/PET
PET/PA/PET
PE-HD/R PE-HD /PE-HD
PE-HD/Adhesive/PA
PE-HD/Adhesive/EVOH
4 layers
PE-HD/R PE-HD/Adhesive/PA or EVOH
D.33
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
State-of-the-art
structure of
multilayer bottles
(
)
5 layers
PE-HD/adhesive/EVOH/adhesive/PE-HD
PE-HD r PP
EVOH or PA
6 layers
PE-HD/R PE-HD/adhesive/EVOH/adhesive/PE-HD
PE-HD or PP
EVOH or PA
D.34
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Radial flow head – Heart
shaped melt flow
channels
D.35
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Radial flow head – Heart
shaped melt flow
channels
)
- Distance to exit on the back side of the mandrel
is shorter than the one of the extruder side = lower
pressure drop
- Reduces parison bending
- Melt parted in two (180°) for optimized distribution
of thickness
- Fusion lines on the opposite part of entry
D.36
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Die centering
)
Die mandrel can be centered by means of adjustment bolds.
Poor centering leads to uneven wall thickness distribution,
resulting in poor bottle stiffness.
D.37
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Die deformation
)
- No flexibility
- Used for containers with
special form (strong oval shape,
square)
D.38
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Die deformation/Partial
thickness control
(PWDS)
D.39
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
Parison thickness
control
(
)
- Programming parison thickness
through electronic system to optimize
container wall thickness and
performance
D.40
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
Parison thickness
control
(
)
Vertical mandrel movements modify the die gap thus the parison thickness
(and its swell)
D.41
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Blowing systems
)
- Blowing is done aside of the die
- Blowing pin descends in to the neck opening (continuous extrusion
lines, with or without neck calibration)
D.42
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Blowing systems
)
- Blowing pin is part of the mandrel (Uniloy equipments) intermittent,
with neck calibration
- Blowing pin replaced by a needle (carousel lines
for aseptic containers or toys)
D.43
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Blowing systems
)
- Two blowing pins moving aside, used for flat articles with high widening
ratio. One of the pin is the blowing pin.
D.44
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Blowing systems
)
- Blowing air needs high pressure
- Too high air pressure causes protrusions closed to the partition lines of
the mold
- Too low pressure causes air trapping, rough surface and partition lines
not homogeneous
- Pre-cooled air or liquid nitrogen can help reducing cycle time and
increasing production
D.45
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Blowing systems
)
- Pre-blowing with open parison
- avoids parison collapse
- Pre-blowing with closed parison
- reduces parison elongation
- optimize mold filling
- improve formation of partition lines
(by reducing accumulation at the end
of the lines contributes to control
parison/container thickness
- reduce blowing time for large containers
D.46
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Parison cut
)
- Cold knives for HDPE (hot for PP)
- Tear through head movements
(Uniloy lines and large containers)
- Tear through mold movements
D.47
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Moulds
)
- Manufactured using aluminum alloys with high heat transfer
- Inserts for de-flashing made of steel with low abrasion coefficient
D.48
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.49
Moulds 2 –
Mould glossary
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Moulds 3
)
Mould movements
- normally the mould moves aside of the die to avoid the descending
parison stitching on the mould
D.50
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Moulds 4
)
Removal of the air from the mould cavity
The air can be removed from the mould cavity along the partition lines
- through venting
- through sand blasting (rough surface)
- Insufficient air venting causes opaque spots on the surface of glossy
containers
D.51
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Moulds
)
Movements of the extruder instead of the mould
- To avoid the parison stitching on the mould, the extruder raises up
(technique used for large containers)
D.52
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.53
Bottle glossary
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.54
Bottle glossary
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Container cooling
)
- The cooling time is the longest part of the production cycle
- Well designed moulds have cooling channels and chambers
- Recommended mould temperature is 15-30°C
- Use of pre-cooled air is strongly suggested
- Cooling units for medium and large containers are strongly
suggested as well in general foe countries with hot climates
- Polymer shrinkage must be take in consideration by mould design
HDPE (< 2 mm): 0.02-0.035 mm/mm
D.55
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
De-flashing
)
- Blowing in the neck: the parison has the same dimensions of the neck
(thread insert)
- Flashing (neck, bottom and handle) are removed by a device
constructed according to the container shape
- The flash pockets facilitate the removal and optimize the partition lines
D.56
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
De-flashing – Pinch-off
zone and flash pockets
)
- Facilitate flashing removal and correct partition lines formation
- Flash pockets must force the material in the welding lines
Factors influencing de-flashing:
- pinch-off force
- pinch-off angle
- length of the pinch-off zone
- mould closing speed
D.57
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
De-flashing
)
For a good impact resistance
D.58
fk
=
SK/SB ~ 1
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
D.59
De-flashing unit
)
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Mould closing
systems
)
Closing force must be:
- sufficient to keep the mould closed
during blowing
- sufficient to pre-cut the parison
for an easy de-flashing
D.60
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Mould closing
systems
)
3 plates unit
Joint unit for small dimension lines
D.61
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Blow moulding –
Intermittent process
)
Accumulator system:
- Used for large dimensions containers
- Used for resins with low melt tension
- No need for mould movements
D.62
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Blow moulding –
Intermittent process –
Type of accumulators
Type ram + mandrel
D.63
)
Type annular ram
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
)
Production
Maintenance
Processing conditions
Labeling of containers
D.64
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
)
To run a trouble free production the operators must have a
good knowledge of the equipment
- knowledge of the line elements and their function
- minimum and maximum performance, limitations
- calibration (specially for coex lines)
- databank per working conditions and formulations
- die selection in function of container shape, weight and spec
- die setting and thickness control through parison programming
D.65
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
)
Temperature profiles
240
220
Temp set °C
200
180
Flat
Reverse
Hump-Back
Ramp
160
140
120
100
0
1
2
3
4
5
6
Zone
D.66
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Maintenance
)
For maintenance and cleaning operations on head, die, screws and
cylinder can only be used brass, bronze, copper or aluminum tools
(mainly self-made)
REMEMBER: all scratches caused by steel tools remain for life!
Preventive and extraordinary maintenance should only be made by
trained staff
Preventive maintenance plan must be prepared for the full year, in
function of resins and additives used
D.67
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Maintenance
)
Preventive
- program according to manufacturer instructions
- calibration of the screw speed
- calibration of the heating elements
- calibration of the extruder pressure transducers
(by comparison) and thermometers (extruders and molds)
- check of the emergency switches
- check of the working pressure
Special
- Dismantling and cleaning the screw and the cylinder
- Dismantling and cleaning the head and the die
D.68
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]
(
Container labelling
)
- Self adhesives labels, paper or plastic, applied off line
- Paper, plastic labels applied by gluing off line
- IML (In-Mold-Labelling), labelling in the mould, with labels pre-inserted in
the mould by robots, using labels made of polymers compatible with the
one used for the container and shoving very low shrinkage
- Printing in or off-line, using different technologies, after surface
treatment, like flaming or Corona
D.69
www.assocomaplast.org
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected]