A paper cup machine mould changeover is complete when the new application has passed its required checks and production has been released. Replacing a mould is only part of that conversion. Sidewall fans, bottom material, approved settings, collection and packing may also need coordinated changes.
Prepare a changeover plan for each approved cup combination. Keep the supplier's configuration-specific procedure at the machine and identify which tasks operators may perform. This guide organizes production control; it does not provide mechanical adjustment instructions.
Define the old and new application
Record both cup drawing revisions, material references and tooling-set identities. Confirm the next order's artwork and packing specification as well as its geometry. A nominal ounce size is not enough to identify the complete application.
Use the mould selection guide for drawing and change-part planning. The changeover record should refer to an already approved combination or identify the qualification still required for a new cup.
Close the previous run before conversion
Identify accepted production, held cups, samples and rejects before material is removed. Record the run's finishing time and remaining order quantity. Keep unfinished inspection or release decisions visible so the next product does not obscure the previous lot.
Reconcile unused fans, bottom stock and packing material by identity and status. Return acceptable stock through the factory's controlled process. Unidentified loose material should not be mixed into a new batch merely to clear the machine area.
Assemble the required parts and references
Check the conversion kit before the machine stops. Use supplier-approved part identifiers and a list that states what is removed, fitted and retained. Include any specified guides, feeding or handling parts rather than assuming one mould is the whole kit.
Inspect stored parts according to the supplied instructions and escalate damage or uncertain compatibility. A missing part discovered during conversion can extend downtime and encourage an unauthorized workaround. Never substitute a similar-looking part without confirmation.
| Changeover stage | Control to record | Evidence before proceeding |
|---|---|---|
| Old-job closeout | Product and material status | Quantities and open inspections identified |
| Conversion preparation | Required kit and instructions | Correct parts and current references available |
| Authorized work | Responsible person and permitted tasks | Supplier/site procedure followed |
| New-material loading | Fan, bottom and artwork identities | Matches the new application |
| First-piece inspection | Sample references and results | Agreed checks pass |
| Production release | Approver and release time | Trial and unresolved items have a disposition |
Follow the approved conversion sequence
Use the machine manual and factory authorization rules for isolation, access, part replacement and restart. Do not bypass guards or use undocumented settings to shorten the transition. Record any approved deviation with its owner and review condition.
Confirm the fitted parts against the conversion list after the work. Keep removed parts identified for storage and check that tools, loose stock and previous-job material have been cleared through the approved process.
Approve samples before normal production
Inspect the first new cups for dimensions, side seam, bottom seal, rim formation and appearance using the agreed methods. Include lid fit, nesting or packing where they are application requirements. Identify the cup/material/tooling combination on the sample record.
Keep trial output separate until the authorized release. One visually acceptable cup does not necessarily demonstrate a stable run. Define the required trial and sampling with the production and quality teams, supported by the supplier's application instructions.
Measure changeover time with a stated boundary
For scheduling, one useful boundary is the last accepted cup of the old job to the first accepted output released for the new job. If the factory uses another definition, state it and apply it consistently. Separate mechanical work, material waiting, trial time and approval delay.
Do not publish a universal conversion duration. The required parts, cup geometry, operator capability and validation scope differ. The capacity calculation guide shows how the measured interval affects available production time.
Review repeated transition losses
Look for recurring missing parts, unclear instructions, excessive trial rejects or slow inspection handoffs. Improve the preparation or record that causes the delay rather than reducing acceptance checks. Retain the next run's results to verify that the change helped.
Discuss the proposed size mix with the HANNAI equipment team. Configuration planning should account for how the factory will convert between actual orders, not only whether each cup fits a broad application range.
Frequently asked questions
Is a mould changeover just replacing one component?
No. The required conversion may include other change parts, material, settings and downstream checks identified by the supplier.
When should the changeover timer stop?
Use the agreed scheduling boundary, such as the first accepted production release. Do not compare intervals defined differently.
Can trial cups be mixed with released production?
Follow the factory's release process and keep their status clear until required checks are complete.
Can every approved size use the same instructions?
Confirm the applicable procedure and parts for each combination. Shared steps do not remove application-specific requirements.
Prepare a size-change brief
Send the old/new cup drawings, material references, order mix and existing tooling list through the HANNAI inquiry page. Identify where current changeovers lose time or create rejects.