Full-automatic orbital stretch wrapper machine for steel tube pipe bundles

Summary: A full‑automatic orbital stretch wrapper uses a motor‑driven ring to wrap steel tube bundles horizontally with stretch film or kraft paper while a power conveyor feeds the product through. Typical configurations support two‑layer packaging (e.g., printed PE film plus kraft paper) in a single pass, with adjustable ring speeds and compatibility with multiple material widths.

🛠️ Core Questions

How does a full‑automatic orbital stretch wrapper work for steel tube bundles?

A bundle is conveyed into a rotating ring that applies film or paper horizontally while the product moves forward on a powered conveyor. The ring orbits the bundle, applying tension and overlap. In a typical cycle, the conveyor indexes the bundle, the ring applies 1–2 layers, then the conveyor ejects the wrapped bundle.

This is a pass‑through process: no pallet or product rotation is required. The orbital ring (typically 18–24 RPM) spins the packaging material from a roll mounted on the ring. For steel tube bundles, the conveyor speed (commonly 8–15 m/min) is matched to the ring rotation to achieve a recommended overlap ratio of 30–50% for secure bundling.

Key Point: Two‑layer capability can be configured to apply printed PE film then kraft paper in a single pass, or to combine both materials simultaneously if dual‑film carriages are installed. Check your material width (typically 500–1500 mm) against the ring inner diameter (e.g., 800–2000 mm, as specified by the supplier).

What types of products can this machine wrap?

It is engineered for long, linear bundles such as steel tubes, pipes, galvanized profiles, solar mounting rails, aluminum extrusions, lumber, and pre‑cut metal sections. The machine handles rectangular or round bundles up to the ring opening size, with typical bundle lengths from 3 to 12 m.

Common applications include:

• Galvanized steel profiles (for solar racking) – bundle length 3–12 m

• Steel pipe bundles (OD 50–400 mm per pipe) – weight up to 3 tons per bundle

• Wooden planks or plastic profiles

Check: Ensure the bundle’s cross‑section fits within the ring clearance. For example, a ring inner diameter of 1200 mm typically accepts a bundle up to 1000 mm wide × 800 mm tall (with margin).

Which packaging materials are compatible?

The machine works with heat‑sealable stretch film (LLDPE, PE), printed PE film, kraft paper, and VCI paper. For bundles needing both corrosion protection and branding, printed PE film can be used as the inner layer and kraft paper as the outer layer.

Material spec table:

Note from supplier context: The machine can be configured to wrap two layers simultaneously – e.g., PE film + kraft paper – using dual film carriages. Verify material roll core diameter (commonly 50–76 mm) and max roll weight (typically 20 kg). For printed film, align the print registration sensor. For exact specifications, refer to the supplier’s datasheet and demonstration video.

What conveyor options are available for feeding tubes?

Three powered conveyor types are standard: chain plate, roller, and belt conveyors. The choice depends on product shape, weight, and surface sensitivity. Chain plate handles heavy, uneven bundles; roller suits long straight profiles; belt protects delicate surfaces.

Recommendation: For galvanized profiles and solar mounting components, the supplier suggests using a conveyor type matching the demo video (visible link: chain plate conveyor example). Key Point: Ensure conveyor width is typically 200 mm wider than the bundle to allow for side guides.

🏗️ Advanced Questions

How do I choose between chain plate, roller, and belt conveyors for my tube bundle line?

Select chain plate for bundles over 1.5 tons or with sharp edges (e.g., steel pipes). Choose roller for long, straight profiles that need gentle handling. Use belt only for light, surface‑sensitive products like pre‑finished aluminum extrusions.

Decision checklist:

1. Weight per bundle: >1.5 tons → chain plate; 0.5–1.5 tons → roller; <0.5 tons → belt.

2. Product surface: Raw steel (no coating) → any type; painted/anodized → belt or rubber‑coated roller.

3. Bundle shape: Round pipes → roller (they may roll slightly on rollers but can be guided); square profiles → chain plate for positive drive.

4. Speed requirement: Chain plate typically allows 10–15 m/min; roller up to 18 m/min; belt up to 12 m/min.

Warning: Do not use belt conveyor for hot‑cut steel bundles (surface temperature above 80°C). Belt materials (typically PVC or rubber) degrade above 60°C. This temperature limit is based on common belt material specifications; verify with your supplier for specific conditions.

How does the two‑layer wrapping work in a single pass?

The orbital ring can be configured with two film carriages: one for printed PE film and one for kraft paper (or a second film). As the bundle passes through, both materials unwind simultaneously, overlapping as the ring rotates. The outer layer (e.g., kraft paper) provides mechanical protection; the inner layer (PE film) seals the bundle and carries labeling.

The process:

1. Both materials are guided to the ring with tension rollers.

2. Ring rotates; both rolls unwind at a ratio determined by material thickness (typically 1:1.2 for film/paper).

3. A photo‑eye sensor (photoelectric detector) detects the bundle leading edge and triggers the wrapping start.

4. After wrap, the film and paper are cut and sealed by a cutting and sealing mechanism (e.g., hot knife or ultrasonic).

Pass/Fail Criteria:

• Pass: both layers lay flat, no wrinkles >10 mm, overlap consistent within ±5%.

• Fail: film breaks due to insufficient tension (adjust dancer arm), or paper tears (add anti‑tear edge strip).

What bundle dimensions and weights can the machine handle?

Based on typical industry specifications, a full‑automatic orbital wrapper for steel tubes accepts bundle length 2–12 m, width 100–800 mm, height 100–600 mm, and weight up to 3,000 kg. These are example values; verify with your supplier the exact ring diameter and conveyor load capacity.

From original content query: The supplier asks for your product size (Length × Width × Height) and max weight to prepare a quotation. Provide these numbers; the machine will be customized accordingly. For exact parameter limits, reference the supplier’s technical documentation.

How much floor space and electrical power does this machine need?

A typical horizontal orbital wrapper occupies approximately 10–15 m² of floor space (excluding infeed/outfeed conveyors). Power supply requirements are example values: 380V/415V 3‑phase, 50/60 Hz, 5–10 kVA depending on ring motor and conveyor drives.

Layout guide (example for a 1.2 m ring):

• Machine footprint (ring section): 3 m long × 2 m wide.

• Infeed conveyor: 3–6 m (depends on bundle length and buffer).

• Outfeed conveyor: 3–6 m (for accumulation and strapping / labeling stations).

• Clearance: Add 1 m on each side for maintenance access.

Electrical connection: Check your local voltage (e.g., 220V 3‑phase is available with a transformer). Pneumatic air: 6 bar, clean, oil‑free (if the cut‑and‑seal unit is pneumatic). These values are representative; always confirm with the supplier for your specific machine configuration.

📈 Selection Checklist

Use this checklist to specify your full‑automatic orbital stretch wrapper for steel tube bundles. Tick each item after verification.

1. Bundle geometry
   [ ] Maximum L, W, H measured (include 50 mm clearance per side)
   [ ] Bundle weight (kg) confirmed
   [ ] Bundle shape: round / rectangular / irregular

2. Packaging material
   [ ] Inner layer: PE film ( µm ) / printed film – roll width and OD
   [ ] Outer layer: kraft paper ( gsm ) / VCI paper / second film
   [ ] Single pass two‑layer required? Yes / No

3. Conveyor selection
   [ ] Weight ≤1 ton → belt (preferred) or roller
   [ ] Weight 1–1.5 tons → roller power conveyor
   [ ] Weight >1.5 tons → chain plate conveyor
   [ ] Surface protection needed (e.g., painted steel) → belt or rubber‑topped roller

4. Speed & production rate
   [ ] Target bundles per hour: __ (typical: 10–30 bundles/h)
   [ ] Conveyor speed min./max. (m/min): __ / __
   [ ] Ring RPM requirement: 18–24 RPM standard; higher RPM for thin films

5. Additional requirements
   [ ] Printed PE film registration sensor required?
   [ ] Kraft paper anti‑tear reinforcement?
   [ ] Infeed/outfeed accumulation conveyor (roller or chain)
   [ ] Safety fencing / light curtains
   [ ] CE / UL certification (verify with supplier – not assumed)

6. Site utilities
   [ ] Power: 380V/3ph/50Hz or 415V/3ph/60Hz
   [ ] Compressed air: 6 bar, dry
   [ ] Floor space: __ m (L) × __ m (W) for machine + conveyors

Final check: Ask the supplier for a detailed quotation including conveyor type, ring diameter, and custom modifications. Reference the original equipment video – horizontal orbital wrapping machine for steel tubes – to confirm functional expectations.

Tip: If your bundles exceed 3 tons or 12 m length, request a customized heavy‑duty version with reinforced ring supports and dual‑drive conveyors. Always request a test wrap with your actual product before purchase – most suppliers offer video trials.

🛡️ Compliance Note: This equipment is designed to meet ISO and ASTM requirements. Verify with the manufacturer.