Nozzle and Feeder Storage System

Placement tooling is expensive, numerous and easy to lose control of. A feeder that is not stored properly gets damaged, a nozzle that is stored in the wrong tray is used on the wrong component, and a rack that has no identification becomes a place where unserviceable items accumulate. A storage system is not shelving; it is the part of the maintenance programme that decides which items are available and in what condition.

What the System Has to Do

A storage system has four jobs: protect the item from damage, make it findable, record its condition and prevent an unserviceable item from being used. Each of these is a specific requirement. Protection means a rack or a tray that supports the item without loading the parts that matter; findability means a labelled position that corresponds to the item type, not to whoever last used it; condition means a visible marker for anything awaiting repair or calibration.

The fourth job is the one most often missing. Where a worn nozzle is returned to the general tray, the next operator will use it, and the defect that follows will be attributed to the machine. A system that separates serviceable from unserviceable items, with a quarantine location and a rule that only serviceable items are returned, prevents that defect at essentially no cost. Feeder maintenance and storage are two halves of the same process.

Feeder Racks

Feeders are long, heavy and easily bent, and they take up a great deal of space. A rack that holds them vertically or at a shallow angle, supporting the body rather than the tape path, prevents the deformation that shows up later as a tape advance error. The rack should have a labelled position for each feeder type and size, so that finding one does not involve reading labels on individual units.

The rack also makes the fleet visible. An empty position where a feeder should be is immediately apparent, which supports the inventory count and the repair loop. Where the rack is in the production area rather than in a store, the distance travelled to fetch a feeder is shorter and the temptation to leave a feeder on the machine is lower. Both effects reduce the time lost to tooling handling.

Nozzle Trays

Nozzles are small, precise and easily damaged by contact with each other. A tray with an individual position for each nozzle, lined with a soft material and labelled with the size, protects the tip and makes the inventory obvious at a glance. Nozzles should never be stored loose in a container, because the contact between them is enough to deform a tip or to chip a coating.

The tray should distinguish types as well as sizes, because two nozzles with the same nominal size from different suppliers may not be interchangeable. Where a machine requires a specific nozzle for a specific head, that should be marked on the position rather than remembered. A tray with unmarked positions is an invitation to fit the wrong part. Maintenance intervals should include a check of the tray contents against the fleet list.

Identification and Labelling

Every position should be labelled with the item type, and every item should be traceable to a record. The label should be legible from the position, not hidden behind the item, and it should be durable enough to survive cleaning. Where items are added or retired, the label should be updated the same day, because a stale label is worse than no label at all.

Identification also supports the maintenance history. Where a nozzle carries an identifier, its cleaning and inspection records can be linked to it, and the trend shows how quickly each position degrades. Without an identifier, the records describe the fleet rather than the item, and the tuning of the maintenance interval becomes guesswork. Fixture and tooling records follow the same pattern.

Condition Control

Condition control means a defined rule for what may be returned to the rack. A nozzle that has been cleaned and inspected as acceptable goes back; one that has failed the inspection goes to quarantine with a tag that states what is wrong and who removed it. The same applies to feeders, to test probes and to fixtures. The rule should be stated where the items are stored, not in a manual.

The quarantine location should be physically separate and should be cleared on a defined cycle, because a quarantine that is never emptied becomes a second store. Items that are repairable go into the repair loop, items that are not go to disposal, and the fleet count is updated accordingly. Where the fleet count is not updated, the inventory drifts and the spares requirement becomes wrong.

Inventory and Replenishment

The inventory should be reconciled periodically against the records, because items are lost, damaged and occasionally removed without a note. A physical count at a defined interval, with the differences investigated rather than adjusted, identifies the weaknesses in the storage system: a rack position that is not used, a tray that is not returned, a quarantine area that leaks. The count is much quicker when the storage is organised.

Replenishment follows from the count and the consumption rate. The quantity of each nozzle type held as a spare should be set from the failure rate and the lead time, and the same exercise applies to feeders. Where an item is consumed faster than expected, the cause is usually a process problem rather than a storage one, and it should be investigated rather than merely re-ordered. Record keeping makes that analysis possible.

Space and Layout

The storage should be located where it is used. A rack beside the placement machines saves a walk on every changeover and encourages the discipline of returning items; a store at the far end of the building encourages leaving them on the machine. Where space is limited, a vertical rack or a rolling cart can hold the same inventory in a smaller footprint.

Lighting and access matter more than they appear. A rack that is dark or that requires moving something to reach an item will be used incorrectly, and the errors will be silent. Designing the storage around the way the work is done, rather than around the space that happened to be available, is what makes the system last beyond the first month.

FAQ

How should nozzles be stored? Individually, in a labelled tray with soft lining. Never loose in a container, because contact damages the tips.

What happens to a worn item? It goes to quarantine with a tag, and the fleet record is updated. Returning it to the rack guarantees that it will be used again.

How often should the inventory be counted? At a defined interval, with differences investigated rather than adjusted away. The pattern of differences identifies the system’s weaknesses.

Does storage location matter? Yes. Storage close to the point of use increases the chance that items are returned correctly and shortens every changeover.