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Roller Systems / Link Aprons

Less space but a lot of protection - roller covers for tight spaces

There are several reasons for using roller blind systems: In some applications, there is not enough room for a bellow cover, in others, a complete cover is not necessary. For these cases, HEMA manufactures a range of compact roller covers and aprons, which offer effective protection against small amounts of chips and coolants.

What are the typical applications for roller covers? 

Roller covers can be installed on many machines. They are always prefered when a protection against chips or coolant is necessary, but only little space is available. We manufacture roller covers for different installation situations: 

  • Without housing: this type needs less space, best used with smaller diameters and short extensions
  • With housing: We recommend this type for safety reasons when longer extensions are used and especially when steel is used for the band material.

Always the right drive

HEMA offers three different drive concepts for its roller blind covers:

Torsion springs TF

This drive is suitable for high mileages at low stress and for plastic belts. The springs are made of a high-quality special wire, which achieves an up to ten times longer service life than conventional spring wires.

Steel belt motor SA

A steel belt motor should be used in applications with high tensile load. The outer band used for the cover serves as a spring motor at the same time.

Steel belt motor FM

This motor is also suitable for high tensile load.

Your advantages with roller systems

Flexible mounting

For roller blind covers with housing, you can choose between twelve standard mounting positions.

Individual equipment

Depending on the application, we use cover strips made of steel or robust plastics.

Variable mounting positions

The operating position can be vertical, horizontal or transverse, with an extension to the left, right, up or down.

Compact construction

Our roller shutter covers without housing and our link aprons can be easily installed even in tight installation spaces.

Der TF-RS-Antrieb für Rollbandabdeckungen - Schnelle und langlebige Antriebe für anspruchsvolle Anwendungen

Platzsparende Schutzabdeckungen für extra hohe Verfahrgeschwindigkeiten: HEMA präsentiert den optimierten TF-RS-Antrieb für Rollbandabdeckungen.

Rollbandabdeckungen von HEMA sind ideale, platzsparende Schutzvorrichtungen für beengte Platzverhältnisse bei Werkzeugmaschinen. Geeignet sind die Rollos vor allem für Anwendungen, die keine vollständige Abdichtung erfordern, aber durchaus einen gewissen Schutz vor Spänen oder Kühlmittel benötigen. Rollbandabdeckungssysteme von HEMA werden ab sofort bei Bedarf mit dem neuen, optimierten TF-RS-Antrieb ausgestattet, der Verfahrgeschwindigkeiten von bis zu 80 m/min erlaubt.

Success in the long-term test 
Roller conveyor covers have to meet special requirements in terms of durability. For this reason, HEMA paid special attention to durability and low maintenance during the development of the drive. The drive was also subjected to a long-term test in the test laboratory and tested in over 1.25 million cycles at 80 m/min. and an acceleration of 1g. The result is promising: there were no effects on the functionality. Thanks to the new type of connection and bearing of the TF-RS drive, roller conveyor covers with plastic belts achieve a significantly longer service life.

HEMA supplies roller blinds both with and without housing, depending on requirements. While the roller blind without housing is particularly suitable as a space-saving version for confined spaces, the housing version is the safer choice for longer extensions. Both versions are available with the TF-RS drive as original equipment. However, adaptation to the new drive concept can also be carried out in the retrofit of existing applications. Translated with (free version)

Aprons: Cost-effective protection

If your machine is exposed to a low chip load from the front, a link apron is sufficient as a protective measure completely. HEMA manufactures these devices in different variants: 

FLEXPRO Link aprons
The metal sections are flat or semi-circular aluminium, brass or steel sections. They are bonded and riveted on a very tear resistant synthetic carrier material.

These aprons are made up of anodized hollow aluminum sections joined with a polyurethane strip. On the visual side the glider elements are rounded at the edges. FLEXSTAR-S can move freely in both directions, FLEXSTAR-C/CR permits only one-way bending, adopting a stable flat position in the other direction.

FLEXSTAR aprons combined with vision inserts are very popular in the assembly sectors.

Link aprons are also available as a "walk-on" design.

Combination of link aprons with ROLLER system

The link aprons can be combined with a system of roller blinds. The link apron is wound on top of the ROLLER standard system. The ROLLER diameter is considerably increased in its wound-up state.The drive unit is exactly matched to the additional weight and forces. We offer complete guide systems based on travel rails, steel cables or aluminium profiles.

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