Executive summary
Bus bars and steel bundles need repeatable, protective packaging, and the machines that do it run through a fixed sequence: infeed, film wrapping, heat sealing, a shrink tunnel and a cooling outfeed. This complete guide covers automatic back packing and shrinking machines for bus bars, steel bundles and industrial packaging. We build these packing and shrinking lines for electrical and steel product plants. Product range and film plan are confirmed per project.
Table of Contents
- What the guide covers
- The five-stage cycle
- Infeed conveying
- Film wrapping
- Heat sealing
- Shrink tunnel and cooling
- Typical configuration
- What the video shows
- Selection checklist
- Operation and safety
- Engineering FAQ
- Next step
- Related reading
- Sources and standards
What the guide covers
This guide covers automatic back packing and shrinking machines for bus bars, steel bundles and industrial packaging applications. These products are long, heavy and often conductive or sharp-edged, so the package has to be repeatable and protective rather than improvised. Automated packing and shrinking takes the variability out of the package, giving a repeatable protective layer without the operator differences of hand wrapping. The product types and the package they need are confirmed per project.
The five-stage cycle
Automated busbar packaging follows a five-stage sequence: infeed conveying, film wrapping, heat sealing, shrink tunnel passage and cooling outfeed. Each stage has one job, and the stages run one after another under control rather than by operator feel. The cycle is what makes the package repeatable: film, seal and shrink act the same on every product. A programmable control system holds this with minimal operator intervention,
so the same settings produce the same result run after run. The five stages and their settings are confirmed per project on the real product range. The five stages and their settings are confirmed per project on the real product range.
Infeed conveying
Products enter the machine through a synchronized belt or roller system, and the spacing between them is set as they feed. Sensors detect the presence of the product and trigger the next stage, so wrapping starts from the product itself rather than from a guess. Precise spacing at the infeed is what lets every following stage hit its product cleanly. Conveyor length and interface are confirmed per project on the surrounding line.
Film wrapping
A roll of shrink film is applied over the product, covering it before the heat step. The film is fed and wrapped so the covering reaches the edges that need it, and the amount follows the product dimensions. Wrapping must be even, because the shrink step can only pull what the film gives it. Film plan and wrap settings follow the product and package, confirmed per project.
Heat sealing
The wrapped film is sealed to close the package before it enters the tunnel. Sealing turns the loose film into a closed cover, and a good seal is what holds when the film shrinks. The seal is made on the film material at the sealed edges, following the product and the package, confirmed per project. A sealed package is the one that shrinks tight rather than opening in the tunnel.
Shrink tunnel and cooling
The sealed product passes through a heated shrink tunnel, where the film tightens around the product, then moves to a cooling outfeed that sets the package. Shrinking is what pulls the film flush against the bus bar or bundle, and cooling locks the package into its stable shape. Tunnel temperature and dwell follow the film and the product, confirmed per project, so the package comes out tight without over-shrinking.
Typical configuration
Figures below list functional design boundaries rather than numeric values, and are confirmed per project.
| Parameter | Typical range, confirmed per project |
|---|---|
| Product | bus bars, steel bundles |
| Film | shrink film plan |
| Stages | five-stage cycle |
| Tunnel | temperature, dwell |
| Control | programmable cycle |
| Electrical supply | 380 V three phase 50 Hz, or 220 V single phase for light machines, selected per project |
What the video shows
Our footage shows an automatic back packing and shrinking line for elongated products. It is a general demonstration, so your product range and film plan are confirmed with us per project.
Selection checklist
| Question | Confirm per project |
|---|---|
| Product range | bus bars, bundles |
| Film | shrink film plan |
| Stages | five-stage set |
| Tunnel | temperature |
| Control | recipes |
| Electrical supply | voltage, phase and frequency on site |
Operation and safety
Run the recipe from the panel and the line feeds, wraps, seals, shrinks and cools each product in sequence. Keep clear of the infeed, wrap section, seal head and shrink tunnel while the line runs, with guarding and emergency stops at the operator position. Routine checks cover the conveyor, film feed, seal unit, tunnel and cooling, per the machine manual. Confirm the recipe against the product before each run so the cycle stays consistent.
Engineering FAQ
Q: What products does this equipment pack? A: Bus bars, steel bundles and industrial products that need repeatable protective packaging.
Q: What is the five-stage cycle? A: Infeed conveying, film wrapping, heat sealing, shrink tunnel passage and cooling outfeed.
Q: Why is sealing done before shrinking? A: Sealing closes the film cover so it shrinks tight rather than opening in the tunnel.
Q: How is the cycle kept consistent? A: A programmable control system runs the stages and stores recipes per product.
Q: What sets tunnel temperature? A: Temperature and dwell follow the film and product, confirmed per project.
Next step
- Email us at info@fhopepack.com with your product range, films and volumes.
- We send a packing and shrinking proposal and a layout drawing within 48 hours.
- We arrange a site survey to confirm product range and plant layout.
Related reading
- Automatic back packing and shrinking line for furniture
- Automatic film sealing machine on panel and door
- Automatic shrink packaging machine for plates
- FHOPE packing machinery product lines
Sources and standards
- ISO 12100:2010 Safety of machinery, general principles for design and risk assessment
- EN 415-10:2014 Safety of packaging machines, general requirements
- EN ISO 13849-1:2023 Safety of machinery, safety-related parts of control systems
FHOPE automatic packing and shrinking line demonstration video. Reviewed as a general demonstration; product range confirmed per project.
Last reviewed: 2026-10-10
