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Blown film lines: Modules

Schematic representation of a 5-layer blown film line

1	Extruder, Reitorque

2	Film blowing die-head with air cooling ring

3	Sizing unit

4	Thickness measuring unit

5	Haul-off unit with collapsing boards

6	Reversing unit

7	Winder

8	Automation

The basis for the global success of Reifenhäuser blown film lines is a mature, modular concept, which provides a high degree of flexibility and economy. Individual modules, such as extrusion, forming and cooling, sizing and haul-off modules, winders, automation and additional units can be combined to create endless new line variations, for flexible manufacturing of a wide range of different products.

1 Extruder, Reitorque

Thanks to the compact design of extruders with Reitorque technology, they are especially suitable for multi-layer blown film lines. They are equipped with gearless drive technology. These extruder series are characterised by:


	30 % reduction in required space
	Torques of 300 to 11,000 Nm at the usual extrusion speeds
	Low maintenance requirements and high machine operability
	Minimised noise (values below 78 dBA)
	Simple screw change, to the front or back of the extruder

Gearless Reitorque extruders are characterised by reduced
energy costs and space requirements.

Standard extruder program

Standard extruder program for blown film lines
with screw diameters of 50 to 200 mm, 30 D

2 Film blowing die-head with air cooling ring

The newly developed blown film die-heads made by Reifenhäuser cater for all needs in the realm of 1 - 7 layer films. Die-heads with diameters between 150 - 2200 mm are available

Spiral mandrel die-heads are used for the extrusion of 1 to 5 layer films. Stack dies are used for 5 - 7 layer barrier films and offer excellent film tolerances, quick product changeover times during production, and a broad range of applications for barrier films in the 25 - 300 µm range.

Stationary die-heads are primarily used nowadays, but reversible and rotating film blowing die-heads are available for special applications

3-layer film blowing die-head with central air supply

7-layer filmblowing die-head

7-layer film blowing die-head with horizontal spiral distributor (HDS)

3-layer filmblowing die head

3-layer film blowing die-head for agricultural films

Reifenhäuser air cooling ring

Reifenhäuser air cooling ring with chambers

3 Sizing unit

By developing own sizing baskets for blown film extrusion, Reifenhäuser has created an important basis for achieving perfect film quality (prevention of basket marks and scratches), with a very robust and stable system. The design of the sizing basket is determined by the customer-specific application.

Sizing basket on roller bearings

Sizing basket with guide bush

Sizing basket with guide bush

4 Thickness measuring unit

Reifenhäuser has partnerships with the most renowned supliers of thickness measuring systems. The measuring data is used to automate the tolerance control systems Reicoflow^® or Reicotherm^® .

Capacitive measuring device with radial adjustment

5 Haul-off unit with collapsing boards

Reifenhäuser has the optimal solution for crease-free collapsing for all film applications. The guiding surface for the various film products is selected from various collapsing angles and lengths.

	Smooth-running rolls for special films
	Carbon-fibre rolls for films
	Wooden guide for HDPE films
	Combinations
In Reifenhäuser designs, the haul-off unit (nip rolls) is always driven by servomotors.

Haul-off unit with carbon fibre roll / wooden slat collapsing unit

6 Reversing

The Reicofly reversing bar system enables contactless guiding of high-quality adhesive film. The microporous rolls are supplied with a low volume of compressed air - instead of being equipped with a complicated blower. The stable design of the reversing bar system prevents the rolls from tipping and ensures creaseless randomizing of the film.

New reversing bar system: Reicofly II

7 Winder

Reifenhäuser also offers its own winder series, for the perfect line. Engineering follows a modular design and provides all possible equipment variations for all product- and customer-specific solutions.
Regardless of whether a winder is used as a single or tandem winder, your product is guaranteed optimal quality. These winders enable all winding methods (contact, contact with central drive, gap with central drive).

SFA II film winder for standard-quality blown film

UFA III high-performance film winder

UFA III high-performance film winder for fine gauge film, adhesive film and sensitive composite film

FAC II film winder

FAC II film winder for short-yardage wide films, side gusset films and 8-ply folded films.

8 Automation

The development of the new generation of the REIcofol® automation system has been based on the following premises:


	Modular, Windows®-based design
	Easy handling with comfortable operator guidance
	Ease of maintenance
	Use of all possibilities for recording operating data

Additional characteristics of Reifenhäuser automation


	Decentralised design, use of modern bus systems (Profibus, Industrial Ethernet)
	Modular programming, in acc. with IEC 1131-3
	Digital drive technology and signal processing
	Network- and web-capable visualisation systems

New generation of the REIcofol® automation system

Your contact person


	The blown film line team can be reached at: +49 (0)2241 481-795 blownfilm@reifenhauser.com > Send message