SLN Shrink Wrap Bundler for Trays and Boxes
The SLN is a non-collating, side-infeed shrink wrap bundler with a welding bar. Pre-loaded trays, single boxes, or stacked rigid items feed in live, in front of the pusher. The pusher sends the pack through a film curtain; the bar seals and cuts; the tunnel shrinks a tight sleeve.
There is no grouping section. If a tray packer, case erector, or operator already built the pack, you do not pay for a collator you will not use. Direct infeed in front of the pusher also makes the SLN Autopack’s fastest single-track welding-bar machine: 12–28 packs per minute.
How the SLN wraps a pack
- Live side infeed. Product arrives from the side — straight conveyor or a 90° curve — already in the pack you want to wrap.
- Sensor + pneumatic pusher. The pack stops at the lay; the pusher fires and drives it through the film curtain. No collation flights.
- Welding bar. Two film rolls (top and bottom) form the curtain. The bar seals top and bottom, cuts, and remakes the curtain for the next pack.
- Shrink tunnel. Heat tightens the sleeve. Autopack’s airflow is built for a strong sleeve with small bullseyes on the ends.
- Discharge. 90° or inline outfeed to the palletizer or takeaway.
That “infeed in front of the pusher” layout is why SLN outruns other Autopack single-track weld-bar models.
Why plants choose the SLN
No collator to buy or change over. The pack is finished before it hits the wrapper.
Fastest Autopack single-track welding bar. Up to 28 cycles/min — quicker than the welding-bar SIT (~12–22 trays/min) when the product can feed live from the side.
Small floor, flexible infeed. Straight or curved (90°) infeed; 90° or inline outfeed. Compact wrapper + tunnel.
Simple, serviceable mechanics. Pneumatic pusher, welding bar, stainless frame, Allen-Bradley PLC/HMI on Holland-supplied systems.
Economical sleeve vs. a second carton. Film around an existing tray or box is the usual way to cut board and still ship a protected pack.
At a glance
- Non-collating welding-bar shrink bundler
- Live side infeed in front of the pusher (straight or 90°)
- For pre-loaded trays, single boxes, stacked rigid items
- Two film rolls, welding-bar sleeve (top and bottom seal)
- 12–28 packs per minute; up to 28 ppm single push
- Autopack’s fastest single-track welding-bar wrapper
- Pneumatic pusher
- 90° or inline outfeed
- Compact stainless wrapper and tunnel
- Integrated control and user-friendly HMI
- Custom infeed and discharge conveyors
Popular Options:
Either. Straight if the pack comes from the side in a line; 90° curve if the line must turn into the pusher. Discharge can be 90° or inline.
Two — top and bottom — joined at the welding bar. For one-roll printed film, look at CMOS overlap machines.
SIM collates bottles, cans, or jars into a multipack, then sleeves. SLN has no collator.
Both wrap trays. SIT is inline behind a tray packer (~12–22 trays/min). SLN is side infeed, live, no tray-packer coupling required, and faster on a single track (up to 28 ppm).
Typically 12–28 packs per minute. With direct infeed in front of the pusher, it is Autopack’s fastest single-track welding-bar bundler (up to 28 cycles/min). Final speed depends on pack size.
Pre-loaded trays, single boxes, and stacked rigid items that need a film sleeve for protection or unitizing.
The machine does not group loose bottles or cans. The tray, box, or stack is already assembled. SLN only sleeves it.
