Aluminum Profile Bundle Tying: Stations, Tension and Cycle

Executive summary Our aluminum profile bundle tying machine ties sub-bundles with film bands at 3–4 stations. Each station’s ring holds a film roll on a clutch mandrel that keeps tension constant until the roll is finished. We set the stations to your profile lengths and pass the tied bundles on to wrapping.


Table of Contents

How bundle tying works

Workers load the profile bundle onto the platform, and the machine positions it automatically before tying. At each station, a ring rotates around the bundle and lays a band of film. A blade cuts the film at the end of each cycle, because the stations run in start-and-stop mode.

After tying, a lifter takes the bundles off one by one. The profiles stop at a row of tying stations, each with its own film roll, before moving on to the transfer conveyor.

Layout drawing of aluminum profile line with four bundle tying stations, transfer belts and wrapping machine
Line layout. Four tying stations with transfer belts feed the sub-bundle wrapping machine.

Where the ties go

The machine has 3–4 tying stations. Depending on the layout, the stations either tie several points on one bundle or work side by side on separate bundles. Illustrative tie spacing for a 6 m bundle, with ties a short way in from each end:

Ties per bundle Positions Spacing
3 ends and middle just under 3 m
4 ends and two inner points just under 2 m

Longer or more flexible profiles usually need the fourth tie. For mixed lengths, we set the positions on your length list.

Film tension and roll-out

Each ring holds the film roll on a mandrel with a special clutch. The clutch keeps the tension constant until the roll is finished, so the last bands are as tight as the first.

Item Detail
Ring speed regulated by an electronic inverter
Film tension constant, by clutch on the mandrel
Roll run-out or film tear automatic stop and operator warning
Film cut blade at the end of each cycle
Cycle times set to your needs

Cycle settings

The stations run in start-and-stop mode, and the times can be set to your needs. Illustrative example: if one tying cycle takes 20 s and loading takes 20 s, a station finishes a bundle every 40 s, or 90 bundles per hour. When stations work side by side on separate bundles, output scales with the number of stations.

We confirm the real tying time on your bundle in the proposal.

What happens after tying

After the tying cycle secures the sub-bundle geometry, the load is transferred automatically downstream to secondary protection modules.

Step Equipment Process details
Lift off Lifter mechanism Unloads the sub-bundles one by one from the tying cradle
Transfer Reinforced transfer belts Transports sub-bundles toward the wrapper infeed roller conveyor
Centering Centering rollers Guides and maintains profile alignment before ring infeed
Surface protection (optional) Automatic paper/plastic packing machine Feeding table → automated paper/PE sheet roll clamp feed → cut-to-length → bundle covering + taping [manufacturer rating]
Wrapping Sub-bundle spiral wrapper Orbital ring applies protective paper or stretch film
End taping Synchronised taping head Applies adhesive tape banding over wrapping tail

As part of a continuous extruded aluminum profiles packaging line, tying stations integrate seamlessly with automatic paper sheet applicators, profile stacking machines, and sub-bundle wrapping equipment [manufacturer rating].

Utilities and safety

We design each line to the plant’s real situation, so power and air are listed in the proposal. The automatic stop on film tear or roll run-out protects the bundle and warns the operator. The standards that apply depend on the destination market. For CE markets, ISO 12100 sets the risk-assessment method and EN 415-10 sets general requirements for packaging machines.

Selection checklist for bundle tying

  • Profile lengths and bundle cross-section dimensions.
  • Required ties per bundle and target output (bundles per hour).
  • Manual loading or automated upstream transfer integration.
  • Downstream surface protection: paper sheet covering, stretch wrapping, and end taping.
  • Plant layout drawing with available floor space and clearance.

Engineering FAQ

Q: How many tying stations do we need? A: The machine is configured with 3–4 stations. We determine the exact station count and layout based on your maximum profile lengths and output targets.

Q: Does tension drop as the film roll runs down? A: No. A mechanical clutch on the mandrel maintains constant braking tension from full roll diameter down to the core.

Q: What happens if the film tears? A: The system detects the loss of tension, immediately halts the cycle, and triggers an operator alarm beacon.

Q: Can we adjust the tying cycle time? A: Yes. Stations operate in programmable start-and-stop cycles, allowing inverter frequencies and dwell times to be tailored to your target line speed.

Q: Where do the tied bundles go next? A: An automated lifter transfers them one by one to reinforced transfer belts, feeding either an automated paper-sheeting unit or a sub-bundle spiral wrapper.

Next step

We plan your bundle tying stations in three steps:

  1. Submit your layout drawing with profile lengths and bundle sizes to info@fhopepack.com.
  2. Receive a proposal within 48 hours, with the station count, positions and layout.
  3. Book a site survey to fit the stations to your line.

Sources

Last reviewed: 2026-10-29