Autopack Logo

Shrink Wrapping Machine Standards:

● Stainless Steel Construction  ● Small Footprint  ● Simple Operation  ● Very Low Electrical Power usage

● Dependable Allen-Bradley PLC & Simple HMI Interface  ● Multiple Size Capability with Quick Change Overs

● Reliable & Dependable Customer Service  

Optional Features:

● Available Registered Print Film  ● Film Perforation  ● Castor Wheels for Portability

● Virtual Machine Monitoring for 24/7 On-Line Factory Support

● Corrugated Pad Insertion  ● Diverters & Lane Dividers

 

SLH Horizontal Collator

  • Up to 23 ppm Single Push
  • Versatile in different product shapes
  • Options permit Pre-filled Trays
  • 90° Infeed

CMOS Continuous Motion Overlap

  • Max 45 Cycles/min (Triple tracks push to 135 packs/min)
  • Bottom Overlap Seal
  • Print Film
  • Card Inserter Option

SLN Non-Collating Direct Infeed

  • Up to 28 ppm Single Push
  • Designed to Handle Pre-loaded Trays, Single Boxes, and Stacked Rigid Items
  • Live Infeed
  • Straight or Curved Infeed (90° to Product flow in machine)

SLO Oval Bottles

  • Up to 22 ppm Single Track
  • Oval Shaped Product
  • Single, Double or Triple Tracks
  • Straight or Curved Infeed (90° to Product flow in machine)

SLR Unstable Products

  • Up to 22 ppm Single Track
  • Designed for Unstable Horizontal Collation
  • Single, Double, Triple Tracks
  • Straight or Curved Infeed (90° to Product flow in machine)

SLC Pad Inserter

  • Up to 14 ppm
  • Pad Inserter
  • Collate directly on Pad, Single lane or Multiple Lanes
  • Straight or Curved Infeed (90° to Product flow in machine)

SLV Vertical Collator 90°

  • Up to 40 ppm (twin tracks)
  • Designed for Rectangular Shaped Products
  • Single or Tandem Track (Output of machine)
  • Straight or Curved Infeed (90° to Product flow in machine)

SIV Vertical Collator Inline

  • Up to 28 ppm
  • Designed for Rectangular Shaped Products
  • Collate Single or Multi-Stack Packs
  • Inline Infeed

SIT Tray Handling Inline

  • Up to 22 ppm (CMOS version up to 40 Trays/min)
  • Designed to Handle Pre-loaded Trays, Single Boxes, and Stacked Rigid Items
  • Direction Connection to Autopack Tray Packer
  • Inline Infeed

About Shrink Packaging

Shrink Wrapping, Shrink Packaging, or Bundle Wrapping is a packaging process in where a group of products are wrapped in shrinkable plastic film which, after exposing them to hot air, holds the products firmly together for transport as either a sales unit or for ease of inventory management.

Bottle Wrap Tunnel Closure

Box Wrap Closure

 

 

 

Advantages of shrink wrapping

  • Cost-effective, water resistant, and causes less scuffing of labels.

  • Easier and much cheaper to automate in comparison to tray or case packing.

  • Product can be seen through the film (unlike cardboard)

  • Leaking is mostly contained to single packs, which prevents damage to full pallets.

The shrink wrapping process

Like any packaging process, shrink packaging involves: preparation of wrapping material (film), preparation of products, enclosing (wrapping) in a sleeve of LDPE film, then shrinking / cooling and discharge.

The shrink wrapping process consists of 3 main steps:

Product grouping

    • The products are arranged into a group (e.g. 3×2 bottles to form a 6-pack). In slower machines, the product is fed in a single lane and grouped inside the machine by successive strokes of pneumatic or electric pushers (or lifters). In faster machines, the product is introduced in multilanes or pre-collated outside of the machine.

Bundle forming

    • A sheet of shrink film is wrapped around the products, forming a bundle. There are currently two main ways of wrapping the product:

      • Using two rolls with hot knife cutting and  sealing 

      • Using single roll with cold knife cutting and overlap sealing in tunnel

Heat shrinking

The bundle passes through a heated zone of the shrink tunnel, where re-circulated hot air causes the film to shrink and conform the the shape of  the enclosed products. Once outside, the pack is cooled by forced air to tighten the film; this creates a semi rigid pack that's ready for stacking on pallets or to be moved further down the packaging line..

Weld Bar Sealing vs Overlap Sealing

There are two ways of wrapping the shrink film around the products.

Weld Bar Sealing

      • This is the traditional way of Sleeve Wrapping: two top and bottom film rolls are joined to form a film curtain. When the product is ready, it is pushed through. The Welding Bar (Sealing Bar) then comes down to form a sleeve on the collation of product simultaniously, cutting the film and rejoining the curtain for the subsequent pack.

 

Overlap Seal

      • This process uses a single film roll: a pre-cut sheet of film is wrapped around the product with the loose ends overlapping beneath the pack. The overlapped region is partially fused in the shrink tunnel while the rest of the sleeve is shrunk to enclose the contents.
      • The main advantage of Weld Bar type machines is lower cost and smaller footprint. 
      • The main advantage of overlap machines is that they produce higher throughput.

Shrink wrapping FAQ 

What sorts of products can be shrink wrapped?

Most bottles, cans, cartons and boxes are ideal for shrink wrapping. It is also possible to shrink wrap many other sorts of products. If you're not sure if your product would lend itself well to shrink wrapping, then give us a call--we'll have the answer.

Can the high temperature of the shrink process affect my products?

Due to the short exposure time and protection offered by the shrink film itself, very few products are affected by the process. Even foil-wrapped chocolate can be shrink wrapped. However thin PVC trays, thin PET containers or not fully filled CSD bottles can distort during the shrinking process. 

How many products can fit in a bundle?

It depends on the size and weight of the products. 12 drink cans (4×3) can be securely wrapped. With smaller products, more can be included. Note that we have vertical stacking options to allow multiple layers of cans and boxes

Are the products fully enclosed?

No. Although the film shrinks around the products, there will be a round opening in the film on either side of the pack, called "bulls eyes".

Can I use the same machine for different products?

Certainly!. Most Autopack machines are designed to be rapidly adjustable to a wide range of products. Contact us if you would like to find the best machine to suit your needs.

Pads and trays

For additional pack strength or ease of handling, a cardboard pad or tray can be introduced under the product before being shrink wrapped.

Alternatives to shrink wrapping

All these forms of packaging can have custom designs printed on the packaging.

Cardboard cartons/boxes

One or more products are fully enclosed. The box can be sealed with glue/tape, or with interlocking flaps (like toothpaste carton).

Cardboard trays

The products are placed in a cardboard tray for easier handling.

Cardboard/plastic crates

Similar to trays; however, crates are more durable and reusable.

11
13
14
15
16
17
18
19
20
21
22
23
24
25

Contact Sales

Have a question about our shrink wrappers? Want to request a quick quotation? Send us a message now!

Contact Sales

Please enter your name.

Please enter your email address.

Please enter your message.

Invalid Input