Why delivery paperwork matters more than it looks
A slit coating machine usually arrives with a crate, a pallet of loose parts and a folder of paperwork. Most of that folder is generic and only matters at customs. The documents worth chasing are the ones you will still need a year later: when you commission the line, when a coating defect appears and someone asks what the machine was actually built to do, or when an auditor wants proof that the acceptance run was done with your own materials.
Before you send a checklist to a vendor, it helps to state the purpose. Useful delivery documentation answers three questions:
One: does the delivered configuration match the configuration you agreed to? Two: was the acceptance evidence produced with your materials, against criteria you agreed before shipment? Three: can your own team run and maintain the machine without phoning the vendor?
Packing list and shipping documents
Start with the boring set: packing list, commercial invoice, bill of lading or airway bill, and a certificate of origin if your customs authority requires one. The packing list is the one that deserves attention. It should itemise the machine, the coating head and pump unit, the unwind and rewind sections, the oven, and every loose item separately: spare shims and gaskets for the coating die, hose fittings, hand tools, and any shaft adapters supplied with the machine. A line that reads "accessories as usual" settles nothing when a part is missing at unpacking and neither side can prove it was in the crate.
Check that the invoice, the bill of lading and the packing list describe the same machine, with the same model and options. A mismatch costs you days at customs and makes a later warranty claim harder to support. Ask for the crate to carry a visible label with your order number, so the paperwork can be tied to the physical machine on arrival day.
As-built configuration sheet
This is the document most often missing. A published specification, such as the one on the slit coating equipment product page, gives a starting point: a machine footprint of 2540 × 800 × 1650 mm, a coating speed that can be set from 1 to 10 m/min, a coating thickness range of 5–200 μm, and a stated product pass rate of ≥99.5%. What a listing cannot tell you is the exact build you bought: the coating width fitted to your machine and the unit it is quoted in, the oven length and how many heating zones it has, the pressure unit used for the coating supply and how that pressure is set, the air shaft diameter, and whether the deviation-correcting device is fitted and how it is configured.
An as-built configuration sheet records what was actually built for your order, with every variable option filled in and signed by both parties. If your purchase order differs from the standard listing, the as-built sheet is where that difference becomes part of the record. Request it before shipment, so you can compare it against your purchase order while changes are still cheap.
Installation and utility requirements
You need a drawing or datasheet your facilities team can act on, not a brochure page. It should state the power connection: supply voltage, total connected load, and how the electric heating oven is fed; the exhaust and ventilation points, including the airflow needed to carry solvent vapour away from the oven section; the compressed-air connection, its pressure and quality, and where the supply line terminates, with the pressure unit used on the specification sheet confirmed in writing; and the access route and floor space, which must cover the full 2540 × 800 × 1650 mm envelope plus clearance for loading rolls and for opening oven panels. Floor loading and door widths belong in the same document, because a machine that fits the production room but not the corridor is still a project delay.
Commissioning and acceptance report
This is the document that protects you most, and it is worth agreeing its content before the machine ships. A useful acceptance report records a run using your own substrate and your own coating liquid, not the vendor's test foil. It should include:
- coating runs at the speed and thickness settings you intend to use, including both ends of your working thickness range, since a machine that coats cleanly at 5 μm can behave differently near 200 μm;
- cross-web thickness measurements at left, centre and right for each recorded run;
- a written definition of what counts as a defect, and a continuous-run record that turns the pass-rate figure on the data sheet into something both sides can audit;
- drying results against your own drying profile for the oven section supplied;
- the settings that produced the accepted result, so they can be saved as a recipe and restored after a shutdown.
If the acceptance criteria are only agreed after the machine arrives, the report becomes the vendor's document rather than a shared one.
Calibration and material traceability
Ask for calibration certificates for the instruments that define your process: oven temperature controllers and thermocouples, the pressure regulation and display for the coating supply, and speed measurement. A certificate without a date and traceability note is decoration. Material certificates for parts that touch the coating liquid, such as the die internals and pump wetted parts, answer corrosion and contamination questions before they are asked. The serial-number plate on the machine should match every certificate and report in the folder.
Operation and maintenance documentation
The operator manual should cover startup and shutdown sequences, web loading and threading through the oven, cleaning and changeover between coating liquids, recipe management and the meaning of each adjustable parameter, and the fault-handling meaning of the three-colour warning light: what each state indicates and what the operator should do. If your technicians do not read Chinese, confirm in writing that the manual and the on-screen text on the control interface will be in the language your team uses.
The maintenance section should be specific to this machine: scheduled maintenance with intervals and the role responsible, a wear-parts list with names and quantities (die shim and gasket kits, pump seals and tubing, shaft components), and consumable specifications rather than brand names alone, so you can source substitutes locally. A spare-parts recommendation that matches the wear list lets you hold the right stock instead of guessing.
Warranty and after-sales terms
Warranty terms belong in the delivery folder as a single written page, not scattered through email threads. It should state what is covered and for how long, what actions void the cover, how remote support is requested and how quickly you can expect a reply, spare-part lead times and who pays freight, and which commissioning tasks are yours and which are the vendor's. When a line stops on a Tuesday afternoon, these sentences decide what happens next.
Before you sign the delivery note
A short closing check saves more trouble than any clause:
- the packing list itemises loose parts one by one;
- the as-built sheet matches your purchase order, including units and model options;
- utility requirements are written for the delivered machine, not a generic series page;
- the acceptance report uses your materials and the criteria you agreed before shipment;
- manuals and control-screen text are in the language your team reads.
Anything missing goes on a punch list with an owner and a date, and you keep the final payment open until the list is closed. If you are still comparing candidate machines, ask each vendor which of these documents they supply as standard and which they will produce for your configuration; the answer tells you as much about the project as the specification table does. PowerDe's thin-film solar equipment range covers slit coating alongside related R&D and production equipment, and you can request the document set for a specific configuration through the contact page.
