Laboratory machines for theprocessing of polymers

E X T R U S I O N L I N E S

F r o m p o l y m e r t o i n f o r m a t i o n

Blown Film Unit Type 180The high performance unit for development work, production control, and small scale production

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F r o m t h e a b s t r a c t p o l y m e r t o t h e r e a l p r o p e r t i e s

A p p l i c a t i o n

B l o w n F i l m D i e

In development work: For approvalof the suitability of polymers or poly-mer blends. To check the maximumstretchability of polymers and theircharacteristics.

In production control: For approvalof specks and pigments dispersion aspart of incoming inspection. In batchproduction for checking the dispersingefficiency of the compounder orextruder.

In production: For production ofsmall diameter film tubes, whichwould be uneconomic to produce onlarge production lines. For examplethe production of thin tubes for foodpackaging, wrapping etc.

Main part of the blown film die is thecentrally fed spiral melt distributor,cobined with the cooling ring — highair stream, perfect distribution — doesgrant small thickness tolerances.

Central Telescope ColumnThe main part of the equipment is thetelescope column which allows thetake-off rolls to be moved up anddown over a distance of approxi-mately 1000 mm or 1500 mm.

This design makes it possible to setthe blowing line in optimum accor-dance to the room height and theextruder position.

Rails at the front side of the columnallow free, stepless positioning andsupporting of the die, the cooling ringand the calibration ring.

Bubble support / calibrationTo stabilize the bubble a hand opera-ted support can as an option be sub-stituted with centrally adjustable cali-bration.

Lay flat unit The blown film is collapsed by meansof adjustable wooden slats. As anoption easy running PTFE-coatedroller-stacks can be delivered.

Take-offThe nip rollers consist of one rubber-coated pneumatically adjustable rolland a chromium-plated coolable roll.They are mounted on top of the central column. Both rollers are drivenvia gears by a geared servo motordirectly attached to the nip rolls.

WinderThe film wind-up is designed withwind-up shaft and bobbin holder. The film wind-up unit is offered assurface and/or central winder.

BaseThe film blowing line also accommo-dates the blower for the cooling air aswell as control valves for inflation airand furthermore, the electric controlcabinet with the control elements forthe take-off and wind-up.The control of the haul-off and wind-up unit as well as the control of thesupporting and cooling air are posi-tioned at the central column in a wayfor easy operation.

Special equipment¥ Dual-lip cooling ring¥ Tubular film guiding support with

central adjustment¥ Automatical lay flat width control¥ Side edge slitting device¥ Additional haul-off unit¥ Second winder¥ Winder for winding without cone¥ Oscillating unit¥ Blown film breaking control¥ Cooling machine¥ Film inspection system

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Blown Film Unit used for productioncontrol with automatic adjustment oflay flat width and special winder forwinding without cone.

consisting of: ¥ Extruder 30 mm ¿ x 25 D with

ECS-microprocessor control,

¥ Blown Film Die with a diameter of 60 mm with Dual-lip cooling ring.

¥ Blown Film Unit 180 / 400 withcentrally adjusted calibration and layflat unit with closed loop control.

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Dr. Collin GmbH Sportparkstr. 2, D-85560 Ebersberg, GermanyPhone ++49 (0)8092/2096-0, Fax ++49 (0)8092/20862

www.drcollin.de, eMail: collin@drcollin.de

Represented by:

D i m e n s i o n s

3200

-420

0

Type 180/400 180/600Roll width (mm) 400 600Lay flat width max. (mm) 380 550Bubble diameter max. (mm) 240 350Die diameter (mm) 50 / 60 / 80 / 100 50 / 60 / 80 / 100Total height (mm) 2200 — 3200 2700 — 4200Cooling height over die (mm) 1000 — 2400 1000 — 3400Take-off speed (m/min) 0 — 12 / 30 0 — 50Throughput max. (kg/h) 2 — 20 5 — 40 Weight (without extruder) (kg) 450 700

Technical data subject to change Version 12E1000

Te c h n i c a l D a t a