How to choose a case packer

What a case packer actually does

A case packer is the machine between your product and your pallet. It takes finished product, groups it into the arrangement that will go inside a shipping case, loads it in, and closes the case so it is ready to be stacked. It is secondary packaging: the case is the shipping container, not the thing the customer opens on a shelf.

Almost every case packer does the same three jobs in the same order, and the differences between machines come down to how they do each one. Collation is where the product gets grouped. Loading is where it goes into the case. Closing is where the case gets sealed. When people say a case packer is a good fit or a bad fit for an application, they are almost always talking about collation and loading.

Collation

Grouping product into the pattern that goes in the case. The most application-specific part of the machine and the usual source of difficulty.

Loading

Placing the grouped product into the case. The T-BOT does this with a Cartesian gantry, which moves on fixed axes rather than an articulated arm.

Closing

Sealing the packed case. Unglamorous, and a common source of nuisance stoppages when case blanks vary.

Product handling decides almost everything

This is the part of a case packer that does not transfer between applications. A machine that runs beautifully with a rigid carton can struggle with a pouch, because the pouch changes shape at exactly the moment the machine needs it not to. Bottles introduce a different problem: they are rigid, but standing upright they are unstable, and how they are held during grouping matters more than how fast the machine moves.

The practical consequence is that you cannot evaluate a case packer on a spec sheet alone, and you should be suspicious of anyone who lets you try. Bring a sample. A supplier who puts your actual product in front of the machine is telling you something no published figure can.

It also means honest suppliers narrow rather than broaden. If someone tells you their machine handles everything, they have either not understood your application or are not telling you where it stops.

Case formats and changeover: the cost nobody quotes

Purchase price is a single event. Changeover is a cost you pay every time the line switches, for the whole life of the machine. Multiply the time by how often you switch and it frequently outweighs the difference between two machines you were agonising over.

Two things decide that cost: how long a changeover takes, and who can perform it. A changeover an operator completes from the HMI is a fundamentally different operating model than one that needs a technician with tools, even if the clock time is similar.

We publish that the T-BOT's case-size adjustments are fast and intuitive, and that they help reduce setup and changeover time. We do not publish a number of minutes, because it depends on your formats. Ask us for it against your actual case sizes — and ask every other supplier the same question, in the same terms.

Ask for a time, against your formats

Not a generic figure. Two of your real case sizes, start to finish.

Ask who performs it

Operator from the HMI, or a technician with tools. This shapes your staffing.

Ask to watch one

A changeover performed in front of you, on your own formats, is worth more than any number on a datasheet.

What “up to 12 cartons per minute” actually means

Every throughput figure in this industry is conditional, including ours. The number is measured with a particular product, in a particular carton, in a particular configuration. Change any of those and the number changes with it. That is not evasion; it is how the machines work.

So the useful question to ask any supplier is never the headline rate. It is what that rate was measured with, and what your format would do to it. A supplier who answers with a range and the conditions attached is being straight with you. A supplier who repeats the headline number without qualification has told you they are quoting marketing, not engineering.

The second useful question is about sustained versus peak. A machine that hits a rate briefly and a machine that holds it across a shift are different machines, and only one of them solves your problem.

Controls, safety and how the machine joins your line

Controls decide what happens on a bad day. When the machine stops at 2am, can the person standing in front of it see why on the screen and clear it, or does that stoppage become a phone call? That difference does not appear in a purchase price and dominates how the machine feels to own.

Networking matters for the same unglamorous reason. A machine that speaks the protocols the rest of your line already speaks is one you can monitor and integrate; one that does not becomes an island with a separate screen nobody looks at.

Safety is not optional, but its scope is negotiable, and that has cost implications. Standard guarding covers the common case; specific facilities need more. Get the safety scope written into the quote rather than discovered during installation.

When a case packer is not the answer yet

We would rather say this here than after you have spent money. Automating case packing is the wrong first move in a few common situations, and recognising yours can save you a year.

If the bottleneck is upstream, a case packer will sit waiting for product and you will have bought capacity you cannot use. If your product or pack format is about to change, wait until it settles — a machine configured around a format you are retiring is an expensive lesson. And if palletizing is still manual while case packing is mostly fine, the pallet is usually the better project, because manual palletizing is heavier work and harder to keep staffed.

None of this means never. It means sequence matters, and the right order is worth more than the right machine bought early.

The bottleneck is upstream

Fix the constraint first, or the new machine idles behind it.

The pack format is changing

Configure around the format you are keeping, not the one you are leaving.

Palletizing is still manual

Usually the heavier, harder-to-staff job, and often the better first project. You can size that one yourself with our palletizer ROI calculator.