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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 4596Frank.Schorzmann@Voith.com

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