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Transcript of )( D.1 Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy -...
)(
D.1
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Blow Moulding Process
& Barrier Containers
Part 2 Equipment
)(
D.2
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
• 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
Major process stages
)(
D.3
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Extrusion blow moulding
– continuous extrusion
– intermittent extrusion Injection blow moulding Injection stretch blow
moulding
Blow moulding techniques
)(
D.4
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Extrusion Blow Moulding – Wheel Machines
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D.5
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Continuous extrusionblow moulding 1
Line with double station for Max. 24 cavities
)(
D.6
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Blow Moulding Machine
)(
D.7
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- 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)
Blow Moulding Line Equipment elements
)(
D.8
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Die
Hot knifecutter
Blow pin
MouldParison
Die centeringadjustment bolts
Equipment set-up
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D.9
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Equipment set-up
)(
D.10
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Dosing and mixing units
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D.11
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Dosing and mixing units
)(
D.12
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Blow Moulding Line – Extruder
)(
D.13
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
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.14
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
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.15
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Screw
D Screw diameter L Screw lengthq Flight angle (17.65) P PitchF Feeding zone depth H Metering zone depthA Feeding zone length/D C Compression z. depth/DM Metering z. length/D N Screw speed, rpm
Feeding zonezone
Compression zone
Meteringzone
P
Connectionto the motor
D
F H
L
)(
D.16
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Typical 3-zone screw: D= 90 mm L/D= 25 Compression ratio: 2.0 to 2.5Length feed section: 10DLength compression section: 6DLength metering section: 9D
Typical barrier screw with mixing head:L/D: 20
Screw
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D.17
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Screw 3
Multi-Purpose Barrier Screw for Grooved Barrels
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D.18
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Shear & mixing elements
Mixing elements 2
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D.19
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Screw 3
Multi-Purpose Barrier Screw for Grooved Barrels
)(
D.20
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
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.21
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Mixing elements
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D.22
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Mixing elements 3
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D.23
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Grooved zone
Cooling
Grooved barrel
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D.24
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Filters – Screen pack – Filter Changer
old filter new filter
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D.25
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- Spiders (PVC)
- Mandrel
- Spyral
Types of dies
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D.26
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- Low cost
- Reduced external dimensions
- High precision with annular die gap
- Difficult centering
- Long time needed for color change
- Output depending
Mandrel die
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D.27
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Standard die
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D.28
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Multiple die
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D.29
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Die design and polymer swell
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D.30
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Die design and polymer swell
)(
D.31
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Coextrusion dies for 3 layers
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D.32
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Coextrusion die for 6 layers and wall structure
)(
D.33
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
2 layersPE-LD/PE-HD
3 layersPET/PET/PETPET/PA/PETPE-HD/R PE-HD /PE-HDPE-HD/Adhesive/PAPE-HD/Adhesive/EVOH
4 layersPE-HD/R PE-HD/Adhesive/PA or EVOH
State-of-the-art structure of
multilayer bottles
)(
D.34
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
5 layersPE-HD/adhesive/EVOH/adhesive/PE-HDPE-HD r PPEVOH or PA
6 layersPE-HD/R PE-HD/adhesive/EVOH/adhesive/PE-HDPE-HD or PPEVOH or PA
State-of-the-art structure of
multilayer bottles
)(
D.35
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Radial flow head – Heart shaped melt flow
channels
)(
D.36
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- 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
Radial flow head – Heart shaped melt flow
channels
)(
D.37
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Die mandrel can be centered by means of adjustment bolds.Poor centering leads to uneven wall thickness distribution,
resulting in poor bottle stiffness.
Die centering
)(
D.38
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- No flexibility- Used for containers with special form (strong oval shape, square)
Die deformation
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D.39
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Die deformation/Partial thickness control
(PWDS)
)(
D.40
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- Programming parison thickness
through electronic system to optimize
container wall thickness and
performance
Parison thickness control
)(
D.41
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Vertical mandrel movements modify the die gap thus the parison thickness (and its swell)
Parison thickness control
)(
D.42
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- Blowing is done aside of the die- Blowing pin descends in to the neck opening (continuous extrusion lines, with or without neck calibration)
Blowing systems
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D.43
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- 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)
Blowing systems
)(
D.44
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- Two blowing pins moving aside, used for flat articles with high widening ratio. One of the pin is the blowing pin.
Blowing systems
)(
D.45
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- 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
Blowing systems
)(
D.46
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- 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
Blowing systems
)(
D.47
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- Cold knives for HDPE (hot for PP)
- Tear through head movements (Uniloy lines and large containers)
- Tear through mold movements
Parison cut
)(
D.48
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- Manufactured using aluminum alloys with high heat transfer- Inserts for de-flashing made of steel with low abrasion coefficient
Moulds
)(
D.49
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Moulds 2 – Mould glossary
)(
D.50
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Mould movements
- normally the mould moves aside of the die to avoid the descending parison stitching on the mould
Moulds 3
)(
D.51
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
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
Moulds 4
)(
D.52
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
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)
Moulds
)(
D.53
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Bottle glossary
)(
D.54
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Bottle glossary
)(
D.55
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- 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
Container cooling
)(
D.56
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- 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
De-flashing
)(
D.57
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- 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
De-flashing – Pinch-off zone and flash pockets
)(
D.58
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
De-flashing
For a good impact resistance fk = SK/SB ~ 1
)(
D.59
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
De-flashing unit
)(
D.60
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Closing force must be: - sufficient to keep the mould closed during blowing
- sufficient to pre-cut the parison for an easy de-flashing
Mould closing systems
)(
D.61
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
3 plates unit
Joint unit for small dimension lines
Mould closing systems
)(
D.62
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Accumulator system:
- Used for large dimensions containers
- Used for resins with low melt tension
- No need for mould movements
Blow moulding – Intermittent process
)(
D.63
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Type ram + mandrel Type annular ram
Blow moulding – Intermittent process – Type of accumulators
)(
D.64
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Production
Maintenance Processing conditions
Labeling of containers
)(
D.65
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
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.66
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
Temperature profiles
100
120
140
160
180
200
220
240
0 1 2 3 4 5 6
Zone
Te
mp
se
t °C
Flat
Reverse
Hump-Back
Ramp
)(
D.67
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
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
Maintenance
)(
D.68
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
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
Maintenance
)(
D.69
Assocomaplast - Centro Direzionale Milanofiori - Palazzo F/3 - 20090 Assago - Milan - Italy - tel +39 02 8228371 - fax +39 02 57512490 - e-mail: [email protected] www.assocomaplast.org
- 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
Container labelling