Expansion units - Simplex Converting Ltd.
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Expansion units

Expansion units by Neuenhauser Vorwald

Expansion shafts, couplings, chucks and shaft pullers

Neuenhauser Vorwald combine traditional skilled craftsmanship, precision machining, technical innovation and commercial foresight, which is the key to their success in the market. With their high standard of qualifications and training, our customers are guaranteed the highest possible quality and maximum flexibility in the execution of standard and special orders.

Mechanical Expansion Shafts

These low-maintenance mechanical expansion shafts are suitable for particularly high specification winding requirements. High standards of quality are shown in absolute true running and concentricity. These shafts can be maintained in operation for many years, after which they can be refurbished with replacement of the worn items.

745

416

410

401

High load capacity of the
expansion shafts with
very low maintenance.

Shaft body made of numerous
materials with various
wall thicknesses.

401

410

Achieves maximum possible moments
of inertia and minimum bending values.

Reliably mounting a number
of narrow individual cores.

Special dimensions possible.

410 MULTICORE © Series

416

Long service life.

Universally applicable, simple
structure, easy handling.

Standard model with individual clamping jaws.

745

For very narrow or
thin-walled cores.

Absolutely concentric clamping.

Very high torque transmission.

High load capacity of the expansion shafts with very low maintenance.

Shaft body made of numerous materials with various wall thicknesses.

Serie 401

Achieves maximum possible moments of inertia and minimum bending values.

Reliably mounting a number of narrow individual cores.

Special dimensions possible.

MULTICORE ©

410 Series

Long service life.

Universally applicable, simple structure, easy handling.

Standard model with individual clamping jaws.

Serie 416

For very narrow or
thin-walled cores.

Absolutely concentric clamping.

Very high torque transmission.

Serie 745

Pneumatic Expansion Shafts

The range of pneumatic shafts are highly robust despite their low weight. Their simple, modular design enables quick exchange of shaft journals and quick repairs. For use in all areas of the paper or plastics processing industries.

409

MB

L

403

A

Quick repairs if necessary.

Long service life.

Standard model with individual expansion ledges.

A

403

Fast and uncomplicated repairs.

High carrying capacity.

Low dead weight.

L

Also for thin-walled cores in which deformation could cause problems.

Special dimensions are possible.

Continuous expansion leaves.

MB

Expanding continuous ledges.

For wide and very narrow reels.

Low dead weight and ease of handling.

409

High flexibility.

Type and number of ledges
accordingly to your application.

Quick repairs if necessary.

Long service life.

Standard model with individual expansion ledges.

Serie A

Fast and uncomplicated repairs.

High carrying capacity.

Low dead weight.

Serie 403

Also for thin-walled cores in which deformation could cause problems.

Special dimensions are possible.

Continuous expansion leaves.

Serie L

Expanding continuous ledges.

For wide and very narrow reels.

Low dead weight and ease of handling.

Serie MB

High flexibility.

Type and number of ledges accordingly to your application.

Serie 409

260

605

SPM/SPZ

609

SMB

SPA

Can be used winding in both directions.

Equipped with freely moving expansion ledges.

Based on the design of the A series winding shaft.

SPA

SMB

Designed for "light" applications.

Length can be adapted
as required, even to
long lengths.

Based on the tried-and-tested design of the MB shafts.

609

Characterised by their light
but extremely robust design.

Used in "harsh" applications.

Based on the 409 series expansion shaft.

SPM/SPZ

Suitable for narrow
sheets and
thin-walled cores.

Based on the principle of the
L series expansion shaft.

260

Special dimensions are possible on request.

For low to medium winding requirements.

Simple and inexpensive.

Expansion Couplings

The Vorwald expansion couplings are fastened on existing shafts to cater quickly for different diameter sizes and a low weight. They expand either pneumatically or mechanically. Their practical design provides for simple handling.

 

All expansion couplings can be optionally equipped with surface protection. Versions suitable for the food industry are also possible. The Vorwald expansion couplings can be converted particularly quickly to other core diameters.

Can be used winding in both directions.

Equipped with freely moving expansion ledges.

Based on the design of the A series winding shaft.

Serie SPA

Designed for "light" applications.

Length can be adapted as required, even to long lengths.

Based on the tried-and-tested design of the MB shafts.

Serie SMB

Characterised by their light but extremely robust design.

Used in "harsh" applications.

Based on the 409 series expansion shaft.

Serie 609

Suitable for narrow sheets and thin-walled cores.

Based on the principle of the L series expansion shaft.

Serie SPM/SPZ

Special dimensions are possible on request.

For low to medium winding requirements.

Simple and inexpensive.

Serie 260

900

860/861

841

834

831

811

Activation via an external push-rod.

Their practical design enables
fast and simple handling with
a long service life.

Standard expansion chucks can be used in almost all winding processes.

811

831

Various expansion lug types are available.

For rewinding and unwinding machines in which the required clamping force is applied by axial displacement of the expansion chuck support.

834

The surface of the steel leaves enables maximum possible torque cardboard, steel and plastic cores.

Expansion chuck expands by means of the existing web tension and is used in unwinders without shafts.

834 Rollmatic ©

841

Expansion lugs are expanded centrally using a transverse clamping piece.

Suitable for shaftless rewinding and winding machines with medium torques.

Manufactured customer-specifically according to the modular construction principle.

860/861

Long service life.

Expansion is carried out pneumatically/mechanically.

Expansion chucks with individual expansion lugs or expansion leaves can be used universally.

900

Manufactured according to Vorwald's proven modular construction principle to meet the specific requirements.

Best option when switching frequently between various core sizes.

Adapter

Expansion Chucks and Adapters

The expansion chucks enable rewinding and unwinding without shafts. Their design ensures particular high torque transmission as well as true running accuracy. Various options such as special dimensions can be implemented to meet customers’ requirements.

 

The mechanical adapters for pushing onto existing expansion shafts or expansion chucks are used if frequent switches between various core diameters are required.

Activation via an external push-rod.

Their practical design enables fast and simple handling with a long service life.

Standard expansion chucks can be used in almost all winding processes.

Serie 811

Various expansion lug types are available.

For rewinding and unwinding machines in which the required clamping force is applied by axial displacement of the expansion chuck support.

Serie 831

The surface of the steel leaves enables maximum possible torque cardboard, steel and plastic cores.

Expansion chuck expands by means of the existing web tension and is used in unwinders without shafts.

Rollmatic ©

Serie 834

Expansion lugs are expanded centrally using a transverse clamping piece.

Suitable for shaftless rewinding and winding machines with medium torques.

Manufactured customer-specifically acc to the modular construction principle.

Serie 841

Long service life.

Expansion is carried out pneumatically / mechanically.

Expansion chucks with individual expansion lugs or expansion leaves can be used universally.

Serie 860/861

Manufactured according to Vorwald's proven modular construction principle to meet the specific requirements.

Best option when switching frequently between various core sizes.

Adapter

Serie 900

Shaft Handling

The ever increasing reel weights and dimensions, automated production processes and the growing awareness of occupational health and safety that is resulting in tighter regulations are leading to a shift away from manual expansion shaft handling and towards the implementation of shaft inserters and pullers. These shaft handling devices are used to pull the expansion shafts out of the finished reel and insert them into the next core.