Automatic L-Bar Sealer with Shrink Tunnel
Wraps boxes, trays and bundles in polyolefin film.
Built around your product
Products are fed into centre-folded film, sealed on two sides by the L-bar and shrunk in the matching tunnel. It is the standard set-up for cosmetics, stationery, printed matter and food cartons.
The product is enveloped in centre-folded or flat film and the open edges are sealed by a hot knife or impulse wire. In the tunnel, recirculated hot air shrinks the film evenly around the product. Polyolefin is used for retail display packs; polyethylene for heavier transit bundles.
Key features
- Photo-eye pack-length detection
- Powered film unwind with pin perforation
- Temperature-controlled sealing knife
- Recirculating-air tunnel with variable speed
Process sequence
Infeed
Products are spaced or collated into the pack pattern.
Wrap
Film is drawn around the product from one or two reels.
Seal
An L-bar, side-seal or cross-seal jaw closes and trims the film.
Shrink
The tunnel heats the film to its shrink temperature.
Cool
A cooling fan sets the film before discharge.
Machine video
A closer look at a typical shrink packaging installation. Ask us for a live demonstration of the SW-L45 on your own product.
Specifications
| Model | SW-L45 |
|---|---|
| Sealing type | Automatic L-bar, PTFE-coated knife |
| Max pack size | 450 × 350 × 150 mm |
| Speed | Up to 30 packs/min |
| Film | POF centre-fold, 12–30 µm |
| Tunnel opening | 450 × 220 mm |
| Heater power | 10 kW |
| Power supply | 380 V three phase |
| Air supply | 6 bar |
Typical configuration. Final values depend on your product and are confirmed in the quotation.
Add-ons
- Automatic collating infeed
- Print-registered film control
- Tray or pad feeder
- Cooling conveyor
Suitable materials and packs
Questions
POF, PE or PVC film?
L-sealer or side-sealer?
Why do packs show “dog ears”?
Get a proposal for this machine
- Application review by an engineer — material, code and line speed
- Trial marking, printing or packing on your own samples
- Quotation with layout, lead time, installation and service
Prefer to talk? Email info@motionworksrobotics.com or call +91 98100 93680.
