Bottling-Line Changeovers: What to Check Before Adding a New Bottle

A new bottle touches more of the line than its volume suggests. The infeed screw, starwheels, guide rails, filling valve centering bells, capping chucks, labeler platforms and case packer grids can all be format-dependent, along with inspection recipes and sensor positions. Before adding a bottle, list every item that must be changed, adjusted, cleaned or reverified, then check the new bottle’s height, diameter, shoulder, finish and label panel against each.

Do this on paper first, with the actual bottle drawing and samples, and then in a documented trial. This guide lists the parts a new bottle usually touches, the bottle data that decides whether they fit, and what a trial record should capture. It is editorial analysis of published sources, and every line depends on the configuration.

Change parts a new bottle touches

Change Parts Inc., a parts maker, describes change parts as guides, starwheels and infeed systems for bottles of different sizes and shapes; chucks, grippers and heads for closures; and rollers, guides or applicator parts for label types. A specification article on filling lines (MarketBrief360) adds that the visible parts are only some of the format-dependent items: filling tubes, bottle lifts, centering bells, vent components, capper heads, inspection recipes and labeler setup may also be format-dependent, and the question to ask is what must be changed, adjusted, cleaned and reverified before the next product runs within specification.

Station	Parts a new bottle may touch	What to check
Infeed	Infeed screw (timing screw), guides, single-file rails	Body diameter and pitch, stability, spacing
Transfer	Starwheels, neck rails, base supports	Pocket fit to diameter, contact point, height
Filler	Valve centering bells, lifts, fill tubes or nozzles	Finish diameter and rim, bottle height, nozzle clearance
Capper	Chucks, grippers, cap delivery and heads	Finish and closure compatibility, height under chuck
Labeler	Platforms or pallets, guides, label sensors	Panel position and height, body shape
Inspection	Camera positions, recipes, reject timing	Bottle height, silhouette, finish
Case packer	Grids, partitions, pick heads	Bottle diameter, height and layout

The case packer row follows from the same logic and rests on editorial analysis, not a specific source; confirm it with the packer supplier. Depending on the line, some parts need no change at all. Fogg Filler, a filler maker, describes universal bottle handling where expandable guides and starwheels are adjusted and color-coded keys are swapped per bottle, and igus reports that a Krones clamping starwheel replaces pocket starwheels that otherwise take around two hours per change. Both are supplier descriptions. Whether such a system suits your bottle range is a question for the supplier and a trial. See the filling machines guide for how filling principle affects format flexibility.

Bottle data to check

Use the supplier drawing, not the catalog photo. The checklist from the bottle specification guide applies, and these items matter most for fit.

• Height. Controls infeed and transfer rail positions, filler stroke or lift, capper clearance, label position and inspection recipes.
• Body diameter and ovality. Controls infeed pitch, pocket sizes, centering and guide spacing. Mojonex, an equipment vendor, notes that a shared nominal volume does not mean two containers share handling characteristics.
• Shoulder and heel shape. Controls neck rails, base supports and whether a bottle tips or catches at transfers. If the bottle is a stock or custom design not yet run, the stock vs. custom guide covers sampling and line trials before ordering.
• Finish. Controls filling valve centering, capping chuck and closure compatibility, and sealing-surface cleanliness. The neck finishes guide covers finish designations; do not infer a fit from the nominal diameter alone.
• Label panel. Controls labeler platform or pallet shape, label sensor position and whether the panel is cylindrical or interrupted. See bottle labeling methods.
• Weight and variation. Mojonex recommends recording empty and filled mass and noting stable support surfaces and areas that must not be clamped. Sample variation matters as well as the drawing.

Mojonex also advises marking unknown dimensions as open rather than copying values from a similar bottle, and attaching the supplier lot or revision to the record. That is vendor guidance, but it prevents a common error.

Trial runs

Bottleunscramblers.co.uk, a vendor, recommends several empty bottles rather than one because they show variation and allow feeding behavior to be checked, and running the smallest, largest and least stable bottles using documented settings. It also advises recording evidence of stability, damage, orientation, recovery and changeover, and notes that where verified numerical acceptance criteria are not available, agree clear qualitative evidence instead of inventing a figure. Sheenstar, a filler vendor, advises checking material, neck size, diameter and height before starting and noting present conditions such as fill volume, conveyor speed and sensor calibrations so settings can be restored.

A practical trial plan has these steps.

1. Dimensional check of delivered samples against the drawing, including finish gauging.
2. Handling run through infeed, transfers and conveyors, with a planned downstream stop and restart.
3. Filling and closing run with the intended product or an agreed substitute.
4. Labeling run with production-equivalent labels.
5. Inspection run with test bottles for the new format.
6. Pack-out run through the case packer.
7. A repeat of the worst-case bottle and any step affected by adjustments.

Wine, beer and sauce lines weight these steps differently; the application guides on wine, beer and sauce bottling cover them.

Documentation to keep

For each format, keep a changeover record that another operator could follow: the parts installed, settings, recipe, sample and lot or revision, and the checks that define an accepted package. Mojonex suggests listing, per format, the installed parts, recipe, observed sample revision and acceptance checks, and keeping untested future formats as open scope instead of presenting them as validated. The bottleunscramblers.co.uk trial advice asks for a change-part list, a settings sheet and the outcome for each extreme bottle. The MarketBrief360 article adds that each planned changeover should document the parts, adjustments, recipe parameters, verification checks and product displaced from the filler circuit, and that a machine with few change parts can still need manual tuning if bottle height references are not recipe-controlled.

Record the final guide positions, speed settings and sensor locations after any adjustment so the result can be reproduced. If the line will carry more formats later, the line planning guide explains how to leave room for them, and the RFQ checklist shows how to ask suppliers to quote changeovers on the same basis.

Questions to send suppliers

1. Which parts must be changed, adjusted or cleaned for each format, and which are recipe-controlled?
2. Which change parts are included in the quote, how many sets, and who supplies parts for future bottles?
3. What bottle drawing data, samples and tolerances do you need, and how many samples?
4. How are bottle height references set and confirmed at the filler, capper and labeler?
5. What range of diameter, height and shape does the proposal cover, and what is outside it?
6. How are guides, starwheels and rails stored, identified and verified as the right set?
7. What changeover documentation, checklists and setting records do you deliver?
8. What trial do you propose for a new bottle, and who attends and signs off?
9. Which inspection and reject recipes change per format, and how are they validated?
10. What assumptions in the quote depend on the finish, shoulder or label panel of the specific bottle?

Evidence and limitations

The line’s design decides the answer beyond this point. Which parts change, how much adjustment is recipe-based and how long a changeover takes depend on machine make, bottle range and operator practice. Several sources are vendors describing their own approach, and none is an independent measurement. No changeover times, success rates or costs are offered; the igus figure is a supplier statement about one clamping starwheel.

• Why Choose CPI for Custom Bottling Change Parts?, Change Parts Inc.: categories of change parts and data to supply (vendor source).
• Injection-moulded clamps in Krones bottlers, igus: pocket starwheel changes versus a clamping starwheel (supplier statement).
• Universal Change Parts, Fogg Filler: expandable guides and keyed starwheels (manufacturer page).
• Container, Closure & Label Data for Compact Filling Lines, MUJIU Industry: bottle data and per-format records (vendor source).
• Bottle Sample Testing for Unscramblers, Bottle Unscramblers: trial sample selection and evidence recording (vendor source).
• How to Specify Bottle Filling Lines for Carbonated Drinks, MarketBrief360: format-dependent parts and changeover records.
• Techniques for Multi-Bottle Size Changeovers in Glass Bottle Filling Machines, Sheenstar: pre-change bottle checks and recording present settings (vendor source).