Screw caps
Threaded plastic closures orientated open-side down or to the presentation required by the chute and capping head.
High-speed closure orientation
Centrifugal cap feeder systems.
Sort and orient caps, lids and rigid closures for controlled presentation into automatic capping, inspection and assembly machinery.
Quick answer
How does a centrifugal cap feeder work?
Loose caps are metered into a rotating bowl. The centre disc separates the bulk mass and moves closures towards perimeter tooling, where the required orientation is selected. Incorrectly presented caps are returned for another pass while accepted closures transfer to the capper chute, conveyor or placement system.
The engineering boundary includes more than the bowl: hopper supply, bowl level, track capacity, cap detection, capping-machine demand and stop/restart behaviour all affect line performance.
- Bulk cap loading and controlled replenishment
- Rapid separation without excessive recirculation
- Correct thread, face or open-side orientation
- Stable transfer into chute or conveyor
- Demand signals coordinated with the capper
Closure applications
Start with cap geometry and capper demand.
Rigid closures with repeatable features can be strong candidates for centrifugal feeding. More flexible or tangled formats need a wider technology comparison.
Flat caps and lids
Low-profile closures separated and selected using face, rim, liner or profile differences.
Overcaps
Protective caps and covers presented to placement, pressing, inspection or assembly operations.
Dispensing closures
Suitable rigid flip-tops, plugs and fitments reviewed for hinge, spout and open-side behaviour.
Rings and inserts
Annular packaging components orientated for insertion, assembly, inspection or counting.
Complex closures
Pumps, triggers and dip-tube assemblies require specific trials and may favour another feeder route.
Capping-line integration
Supply the capper without starving or flooding it.
The accepted result is a controlled reserve of correctly orientated closures available when the capping machine calls for them.
Bulk storage
Hopper capacity and refill level are matched to the desired operator attendance interval.
Level control
Sensors regulate replenishment so the bowl remains productive without excessive cap pressure.
Orientation checks
Mechanical selection and optional verification manage inverted or incorrectly presented closures.
Vision verification →Transfer route
Chutes, belts or air-assisted tracks preserve orientation between feeder and cap applicator.
Accumulation
A controlled buffer absorbs short capper pauses without compressing or damaging closures.
Machine handshake
Full-track, low-level, run demand and fault signals coordinate the feeder with the line.
Specify the cap family, not one perfect sample
A closure can change between mould cavities, suppliers, colours, materials and batches. Liners, tamper features, flash, distortion and surface finish can all affect separation or selection. The approved sample set should represent the range production will actually use.
Define the orientation at the capper
State whether the cap must arrive thread-down, open-side down, hinge-leading, face-up or in another controlled presentation. Also define the permitted rotation and the exact point at which orientation is accepted.
Measure accepted closures per minute
The useful rate is not the number circulating inside the bowl. Count correctly orientated caps at the capper interface under normal replenishment and demand. Record rejects, interventions, blocked chutes and recovery after short stops.
Plan format changeover
Where several caps share the system, identify change parts, tool-free adjustments, recipe settings, line-clearance points and verification checks. A fast feeder provides little value if changeover is slow or settings are difficult to reproduce.
See how the complete automatic feeding path connects to production machinery →
Best first step
Send closure samples, a marked orientation image, target bottles per minute and the receiving capper details. This allows the feeder route and trial plan to be narrowed quickly.
Cap feeder FAQ
Practical answers for closure-feeding projects.
What is a centrifugal cap feeder?
A centrifugal cap feeder uses continuous rotary motion and closure-specific tooling to separate bulk caps, reject incorrect presentations and deliver correctly orientated closures to a capping, inspection or assembly process.
Which caps and closures can be fed?
Potential applications include screw caps, flat caps, overcaps, dispensing closures, rings, plugs and suitable lids. Pumps, triggers and closures with flexible dip tubes may require a different feeding principle or specialist handling.
How fast can a cap feeder supply a capping line?
The sustainable rate is application-specific. Cap geometry, orientation yield, lane count, outfeed accumulation, capper demand and replenishment all affect accepted closures per minute.
Can one centrifugal feeder handle several cap sizes?
A part family may be possible when the closures share suitable geometry and change parts or repeatable settings can control the differences. Each variant must be trialled and the changeover method defined.
How is an inverted cap detected?
Mechanical tooling can reject an incorrect presentation and optional sensors or vision can verify visible orientation before the cap reaches the application point. The inspection method depends on the closure and required assurance.
What samples are needed for a cap feeder trial?
Send caps from multiple production batches and every cavity, colour, material, supplier or revision expected in use. Include normal flash, distortion, liner variation and the bottles or downstream interface where relevant.
Technical content reviewed by Sortation Solutions · Updated 1 September 2026