1 VariFit TM Product Presentation 20.01.22
1
VariFitTM Product Presentation09.04.23
2VariFit | 09.04.23
VariFitTM Contents
• VariFitTM Benefits and Layout
• Layout Data
• Key features
- Unwind
- Web threading
- Guide and Spreader Rolls
- Automatic Slitter Station
- Rewind with Automatic Roll Set Change
• Pre-Commissioning
• Automation Concept
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VariFit™ Benefits and Layout
• High capacity - optimized machine set up - high speed winding - fast & reliable roll set change - fast & reliable format change
• Highest roll quality - excellent and constant roll quality - large roll diameter - high number of rolls within a set
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VariFit™ Benefits and Layout
• Highest flexibility due to covered winder drums
• Compact & proven design - pre-commissioned - trouble-free operation
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VariFit™ Benefits and Layout
Unwind Web threading Rewind with ejector and integrated core loader
Winder drumsdia.800mm
Set ChangeEquipment
Spreader rolls
AutomaticSlitter Station
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Layout Data
Paper Grades WFU
Basis weight 50 - 100 g/m²
Design speed 2.800 m/min
Operating speed 2.500 m/min
Parent Reel diameter 3.500 mm
Parent Reel weight 47 t
Trimmed width 5.200 mm
Slitting width 480 - 1.700 mm
Roll diameter 1.000-1.600 mm
Core inner diameter 3, 6 “
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Unwind
Unwind station with gearbox
• Unwind with forks to clamp the reel spool - Gear box (optional) - Coupling - Brake - Hydraulic axial adjustment
• Rapid reel spool change
• Safety guard with interlocked doors on both sides
• Safety light to prevent lifting the spool in engaged condition
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Unwind
The hydraulic axial adjustment shift the parent reel within ± 75 mm in order to align the web into the middle of the maschine as well as to perform the oscillation.
Hydraulic axial adjustmen Pneumatic centering
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Web threading
Air floater
Driven roll
Guide plates
Driven roll Web conveyors
Web picked up by operator
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Guide and spreader rolls
Spreader roll in an arc shape
2 grooved and anodizedguide rolls with diameter 225 mm
Web tension guide rollwith load cells
Guide roll belowslitter station beam
Spreader roll with 150mm wide segmentsarranged in an arcshapeVertically adjustableover a flexible bar
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Spreader Roll System
• The guide roll before the slitter station with the segments arranged in an arc shape introduces shear forces into the web and tensions it in order to perform a clean cut
• The spreader roll is also arranged in an arc shape to assure a good web separation. The spreader rolls are also vertically punctually adjustable to amplify the spreading if necessary due to possible profile or moisture fluctuations.
• The adjustment valves are positioned at the safety guard for change during operation. Spreader roll
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Flexible steel plate
Dimension: Diameter 123 mm, width 150 mm Grooved aluminium roll with molybdencoating
Pneumatic cylinder
Spreader Roll System
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Automatic Slitter Station - TruSet™
• Fully automatic slitter positioning system using two endless belts for the Top- and Bottom slitters
• Three point pneumatic cylinder for positioning and fixing of Top- and Bottom slitters
• Positioning of all Top- and Bottom slitters simultaneously in approx. 15-20 sec - Format change speed 35 mm/s to reach rough position - Fine tuning time to enable “Position reached” 13 s
Automatic Slitter Positioning
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Automatic Slitter Station - TruSet™
• Mechanical accuracy +/- 0.25 mm with MT magnetic rods
• No mechanical connection between top- and bottom slitters - makes it possible to perform format changes although the web is feeded
• Power supply with sliding contacts,
• Bus connection and low voltage supply (24 V) with spiral cables
Automatic Slitter Positioning
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Slitter Position Measurement
• Permanent positioning measurement by magnetic measurement via rods
• Reliable position measurement
• No calibration necessary after electrical shut down
• Maintenance free operation by magnets at each slitter carriage
• Voith Experience and continuous development since
more than 10 years
Automatic slitter position measurement
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Slitting Station
• Positioning of all slitters simultaneously
• Highest positioning accuracy
• Reliable slitter positioning
• Easy to operate
• Maintenance friendly
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Bottom and Top slitter (easy adjustment)
• Overlap top and bottom knife: 1,5 – 2 mm
• Radial and axial movement by top knife
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Bottom and Top slitter (easy adjustment)
• Bottom slitter
- Hard metal knife
- Hardness 1300 HV
- Diameter 240 mm
• Top slitter
- Powder metallurgical knife
- Hardness 800 HV
- Diameter 200 mm
Bottom Slitter: No calibration after regrinding necessary.
Top Slitter: Easy & fast adjustment via Scale
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Rewind
Winder drum 1 Winder drum 2
Automatic set change equipment
Rider roll
Core guidance
Lowering unit
Roll ejector
Safety guard
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Rewind – Winder drums
• Winder drum 1
- Diameter 800 mm
- Made of steel with grooved surface
• Winder drum 2
- Diameter 800 mm
- Made of steel with tungsten carbide
coating
• Each drum has a standstill break
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Rewind - Rider roll
• Stiff design of rider roll crossbeam
• The line load (or load release) is made by the hydraulic cylinder
• Cross shaft with cog wheels for synchronous movement Gear rack on both sides
• Rider roll in plain steel - Diameter 269 mm
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Rewind - Core guidance
• The core chucks are axially guided and tensioned by an electro motor
-The axial adjustment is 300 mm per side
• The core chucks are vertically guided by
hydraulic cylinders
-This means that the chuck is weigh compensated and no vertical forces act on the core edges
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Rewind – Roll ejector
• The ejector beam is pivoted around the first winder drum. The movment is carried out hydraulically
• A machine wide segmented roll is installed on the ejector beam to perform the web separation and the end gluing
• Max loadable core outer diameter is 185 mm
• Minimal roll diameter to be ejected is 500mm
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Rewind - Core table and core pusher
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Rewind – Safety guard
• Hydraulic safety guard with adjustment valves for the spreader roll
• Interlocked safety doors at both sides
• Working area for the roll lowering unit interlocked with light gates during roll change
Yellow safety doors
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Automatic Roll Set Change
• Fast and reliable roll set change
• The innovative roll set change combines web perforation
with the hot melt technology in one process step
• The start- and end gluing is applied from the coated application roll simultaneously as the web is being perforated for the roll set change. The process step is performed at the end of the deceleration phase
• This eliminates the separate web separation with a severing pan at zero speed
• Simplified tail threading using Voith Tail Threading Technology
Automatic Roll Set Change
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Automatic Roll Set Change
Glue nozzletraveling in CD
Perforating roll with counter holder
Inflatable hose to hold the web during set change
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Automatic Roll Set Change
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Gecko™Roll Start and End Gluing
321
Design and Components
(1) Hotmelt Tank
(2) Melting unit with gear-type pump
(3) Control cabinet
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Gecko™ Roll Start and End Gluing
• Hotmelt glue especially developed for the demands of the paper industry
• No risk for the stock circulation
• Dissolutes in pulper from the carrier material, clogs and can be filtered
• Tack time > 30 mins
• Suitable for all current paper, packaging and board grades
• Extremely high agglomerating power
• Good handling since packed in bags
• Suitable for indirect contact to food (acc. to FDA 21CFR175.105)
PowerTack™ M700
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Pre-Commissioning at the Voith Workshop
• The VariFit™ will be completely pre-erected and pre-commissioned
• This allows short erection and commissioning time on site
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Pre-Commissioning at the Voith Workshop
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MP370 Panel Field
PROFIBUS DP - 1
Unwind Drumsknifes
Drive package optional
SPS
S7 416F.2DP
(Controls)
MMM
MMM
PROFIBUS DP - 2
Knife Section
TruSet
Valves
ET 200 M
Hydr. Unit
DP/AS-LINK
ET 200 M
SENSOR PUSH BOTTOM
Hydraulic Valves
SENSOR PUSH BOTTOM
SENSOR PUSH BOTTOM
SENSOR PUSH BOTTOM
TS Column
Unwinder/Reel Section
TS Column
Knife Section
DP/AS-LINK
ET 200 M
SENSOR PUSH BOTTOM
Hydraulic Valves
SENSOR PUSH BOTTOM
SENSOR PUSH BOTTOM
SENSOR PUSH BOTTOM
DS Column
Unwinder/Reel Section
DS Column
M
CCMMotores CA
ET 200 M
MCC
ASI
SENSOR PUSH BOTTOM
ASI
KNIFE SECTION ANDTRUE SET
Base Scope
VariFit Control System
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Contact:Frank SchorzmannApplication Engineer WinderTel. +49 2151 896 799Mobile: +49 175 292 [email protected]
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