VAREX Coex-3-LAYER MACHINE

screw dimensions: 50/60/50 - 30D

The machine was only 6500 hours on the net

Counter


Winder-width:             1.200mm

max. Working width:       1.100mm

Film thickness:           8-150 micron 

Distribution of layers(%):1:1:1 to 1:5:1

Capacity:                 Up to 200 kg/h

Products:                 LD, LLD, HD, mPE, PP,
                          mPP,EVA 8%, blends

Die inserts:              160mm and 200mm diam.

BUR possibilities:        LD/LLD up to 4:1
                          HDPE up to 5:1

DESCRIPTION OF EXTRUDERS:

- Inner  layer            VAREX 50/30D
- Middle layer            VAREX 60/30D
- Outer  layer            VAREX 50/30D

- Screw with special mixing and homogenisation zones
- CANTRAC® control system for contactless activation of heating system,tempeature controlled start-up safety feature and hoursrun meters.
- Display and controls at the operator panel.
- Cables with plug connectors between electric cabinet and extruder, for W&H standard configuration.

- screw type:             HPS 
- feed bush:              grooved, with temperature control.
- Cylinder feed-zone:     bimetal
- cylinder-tempering:     4 heating-/cooling zones
- Mechanical screw extractor

Extruder 50mm diam.:

- Screw speed:            4 - 200 ump
- Enginepower:            30kW AC motor

Extruder 60mm diam.:

- Screw speed:            4 - 160 upm
- Enginepower:            55kW AC motor

MANUALLY SCREEN CHANGERS

- 3 screen pack changers with manually operated mechanical slide mechanism for the screen casset. Per each 1 heatingzone and gauge hole for melt pressure and tempeature elements.

CONNECTING FLANGES

- Loacted betwee screen pack changer and die, including heating and gauge holes for melt temperature instruments.

MELT PRESSURE AND MELT TEPERATURE MONITOR FOR ALL 3 EXTRUDERS

- With electrically operating pressure transmitter. Indicator with maximum contacts to release an acoustic alarm and/or shut down the main motor.
- measuring range: 0 -> 700bar.
- special thermocouple with indicator: with read-out via the monitor of PROCONTROL® operator console, subject to OPTIFIL PLUS Module H being incorporated.

3-LAYER DIE HEAD (3-SCHICHT BLASKOPF) Type B 160/250-3-ZIK

mounted on a supporting cart and equipped with:
- electric heating, center-fed design, elbow connecting pieces, spiral mandrel distributor, hard chromed melt contact surfaces, with 4 control zones.

FILM COOLING SYSTEM

- Dual-lip cooling (for 160 mm and 200 mm)
- Frequency control of all three blowers (reproducible)
- Multi-level IBC (for 160 mm and 200 mm)
- Cooling air blowers for internal and external film cooling.
- exhaust fan to remove the warm air from the interior of the bubble.
- automatically controlled butterfly valve ensuring a constant film tube diameter.
- blower output: 60/20/23 Nm³/min

SPEED CONTROL FOR TRIPLE BLOWER UNIT

- for the cooling-air blower for internal bubble cooling.
- for the exhaust fan removing the warm air from the interior of the bubble.

FILM CALIBRATING BASKET

- 380 - max. 1200 mm double -flat film.
- Ultrasonic bubble control (non-contact tube diameter control)

THICKNESS-CONTROL

- Capacitive 360 º reversing thickness gauge above calibrating basket

COLLAPSING FRAME

- Side gusseting unit.
- Combined CFRP-rollers (easy-run) and wooden slats.
- Insulating cover on CFRP-rollers (less wrinkles)
- Tube edge guide with wooden slats.
- Steel - rubber nip rolls (ozone resistant rubber cover)
- Up to 1600 mm tube width.

OSCILLATION HAUL OFF UNIT

- 360 º oscillation, horizontal design.
- Air cushion on turner bars.
- Haul-off speed up to 150 m/min.

CORONA - TREATER

- Segmented, 2-side pre-treatment

TANDEM-WINDER

- Back to back.
- 1200 mm working width.
- Surface driven winding.
- Fully automatic roll change.
- Contact roller (cross-grooved rubber).
- Web tension via dancer roller.
- Web center guiding system (ultrasonic)
- Tube edge slitting, edge trimming and film cut-off on roll change.

CONTROL SYSTEM

- Primarily intended for control and logging.
- Receipt/ temperature storage system.
- Trend display.
- Communication possibilities (optional) with direct transfer of all processing data to spreadsheet.

GRAVIMETRIC FEED SYSTEM

- For 1 primary component and 2 secondary components per extruder.
- Gravimetric throughput of primary component, and screw speed controlled throughput of secondary components.