Most packaging machine horror stories do not begin with a broken machine. They begin with a clean PDF quote from a company nobody ever visited, signed by a salesperson who stopped replying the week after the deposit landed.
We sell packaging machines, so take this as slightly self-interested advice. But we also get the panicked emails from buyers who already paid someone else, and the pattern repeats almost every time: no factory visit, no spare parts list, no named engineer, and a warranty that turned out to mean “we will think about it”.
None of the checks below need a consultant or a lawyer. They need an afternoon of pointed emails and one awkward video call.
1. Find out who actually builds the machine
Three types of companies sell “automatic packaging machines” online. The first is a factory that machines and assembles its own frames. The second is an assembler that buys frames and components and builds to order, which is very common and perfectly fine. The third is a trading company forwarding your email to a factory it has never audited.
None of those is automatically a problem. Not knowing which one you are talking to is the problem. Ask two questions: how many people work in final assembly, and can I see the assembly floor on a video call tomorrow morning, no appointment. Factories and assemblers say yes. Traders change the subject to price.
2. Ask what is inside the control cabinet
A packaging machine is a frame, a film path, a set of jaws, and a cabinet full of parts. The frame and the jaws are usually made locally, and that is fine. The parts that decide whether the machine still runs in year ten are not local: PLC, servo drives, HMI, photoelectric sensors, pneumatic valves, vacuum pump, bearings.
Ask for brands and model numbers in writing. If the reply is “international brand” with no model number, you will receive whatever was cheapest that month, and the model may change between the machine you approved and the machine that ships.
3. Walk the floor, and look at the boring corners
If you visit, or if you get a video tour, skip the showroom. Look at three places instead: the inside of an open electrical cabinet, the scrap bin, and the shipping area.
Wiring should be numbered, ferruled, and tied, with a schematic in the door pocket. Wires twisted together and wrapped in tape are a preview of your next six months. The scrap bin tells you how a company handles its own mistakes, and the shipping area tells you how your machine will be packed when nobody is watching.
4. Get the spare parts list before you sign, not after
Ask for a recommended two-year spare parts list with unit prices. Then ask separately about lead time on six items: sealing jaws, cutting knife, PTFE tape, vacuum pump vanes, solenoid valves, and the HMI screen. Finally, ask whether those parts sit on a shelf or are made to order.
A machine that needs a four-dollar sensor and cannot supply it for six weeks is not cheaper than the machine that costs eight percent more. The purchase order is the only moment you have leverage on this, so use it.
5. Read the CE certificate like a buyer, not a tourist
The certificate has a number, an issuing body, and a scope. Check that the scope actually lists your model or model series. A certificate issued for a different machine in the same factory protects nobody. Ask who carried out the risk assessment and whether there is an EN ISO 12100 report behind it. If the machine ships with a guarding package, ask for the drawing, not the photo.
6. Call a reference who runs your product
Everybody has three happy references. What you want is a customer running your product type on a similar machine, ideally in your region, ideally for two years or more.
Ask them four things: what broke, how long the part took to arrive, whether anyone answered the phone at 2 a.m. their time, and whether they would buy again. If the supplier hesitates to give you a name in your own country, that hesitation is information too.
7. Put the test in the contract
Your payment schedule should have a hook in it: deposit, then balance after a factory acceptance test that you or your engineer actually witnessed, then the remainder against shipping documents. Write the test into the contract, including the product and film you will bring, the run duration, the acceptance criteria, and what happens if it fails.
Vague acceptance clauses are how buyers end up accepting a machine that “just needs a small adjustment” for the next five months. We walk through the test itself in our factory acceptance test checklist.
8. The warranty sentence that matters
“Two years warranty” means nothing until you know when it starts. On shipment? On arrival? On commissioning, which might be five months later if your building is not ready? Ask, and get the answer in the contract.
Then ask what is excluded. In practice, four exclusions cause most disputes: film quality, water in the air line, voltage fluctuation, and operator error. Three of those are preventable with a refrigerated dryer, a stabilizer, and half a day of proper training, so budget for them instead of arguing later.
9. Test the communication before you test the machine
Send a technical question with a photo of your product and your film specification. Note how long the reply takes and whether it answers what you asked. A supplier who replies vaguely before the sale replies less often after it.
Before you pay, ask who your contact will be after shipping, and get that person’s name, direct email, and WhatsApp number. If the answer is “the sales team”, you have no contact.
The red flags, in one list
- Prices forty percent below everyone else, with no explanation of what was removed
- No factory video call, ever, because of “company policy”
- Spare parts list only available after purchase
- Warranty that covers “the machine” but not the servos or the HMI
- Payment requested to a personal account rather than a company account
- Spec sheet numbers that change between the quote and the contract
- Nobody on the team can tell you the film thickness range without asking a colleague
Seven questions to send tonight
- What PLC, HMI, and servo brands are used, and which models?
- What is the lead time on sealing jaws and the cutting knife, from stock?
- Which model numbers appear on your CE certificate scope?
- Who will be my technical contact after shipment?
- What is the warranty start date, and what is excluded?
- Can I send 20 kg of my product and two rolls of my film for a test before I order?
- What is the total connected load, and what air consumption should I budget for?
None of this is hostile. A good supplier enjoys these questions, because they are the ones that separate a ten-year customer from a one-container sale.
Frequently asked questions
How can I tell whether a supplier is a real manufacturer?
Ask for the assembly headcount, a live video walk of the floor with no advance notice, the component brand and model list, and the factory address printed on the CE certificate. Real factories answer all four within a day. Trading companies usually answer two.
Is buying through a trading company always a bad idea?
Not automatically. A good trader with a strong technical team can be easier to work with than a factory with no export department. The risk is that nobody on your side can make the factory change anything once the order is placed, so ask who signs the FAT report and who pays for the rework.
How long should the warranty run?
Twelve to twenty-four months from commissioning, not from shipment, is the fair version. Anything shorter than twelve months on a new machine usually means the seller expects you to discover the problems yourself.
Should I pay the full amount up front for a discount?
Rarely. A ten percent discount is not worth losing your leverage. Keep at least thirty percent against the acceptance test and shipping documents.
Related reading: what an automatic packaging machine costs and why packaging machine lead times slip.