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PET Air Conveyor Neck Sticking: Bottle and Guide Review
Investigate PET air-conveyor sticking using neck/support-ring evidence, guide revision, accumulation and point-of-use air conditions.
What to establish first
Compare the neck support and bottle presentation with the qualified package. Intermittent sticking can follow a material or format change and requires an interface review rather than a general increase in air supply.
Three checks before a change
- Confirm neck geometry, bottle mass and sample lot against the approved drawing. Identify changes in container or preform supply.
- Mark the first sticking location and line state. Review guide cleanliness, adjustment and transitions using the authorised service procedure.
- Confirm the specified air condition and trial the intended package through starts, accumulation and release. Retain affected bottles and the setup revision.
Interpret the observed pattern
| Observed pattern | Next review |
|---|---|
| Sticking follows one bottle lot | Compare actual neck/support-ring evidence against the approved interface range. Do not infer complete compatibility from a nominal finish name. |
| Sticking repeats at a guide location | Document the location and guide revision, then request an isolated interface review. Keep packaging and equipment responsibilities explicit. |
| Sticking follows accumulation or restart | Compare bottle spacing, downstream state and point-of-use air conditions. Verify the authorised recovery case, including neck damage and later closure requirements. |
Evidence to record
Use these fields as a worksheet. Keep individual results and comparison samples; an overall average alone may hide the affected condition.
| Record item | Required evidence |
|---|---|
| Bottle neck and drawing revision | Identify the exact format, lot and document revision; attach a representative sample or record. |
| Material lot and bottle condition | State the location, method, instrument and operating condition so a comparison can be repeated. |
| First sticking location | Link the observation to an individual sample and a common timestamp; retain both normal and affected cases. |
| Air and format-trial results | Record the approved assessment, action, verification result and responsible person; keep unresolved items visible. |
Controlled trial and acceptance
Agree the observation, affected boundary and acceptance method before starting a trial. Identify the product-package combination, approved settings and responsible equipment or quality owner. A test must have a clear question and a controlled disposition for trial material.
Compare the existing and proposed condition with identified samples using the same measurement basis. Change only what the responsible owner has authorised. Include the relevant steady-running, stop or restart case; one passing sample does not establish repeatable operation.
Keep results, samples and configuration revisions together. Record what passed, what remains open and the exact approved scope. If a correction moves the defect to another process step or compromises another acceptance requirement, retain that result and continue the assessment.
Common question
Should blower output be increased whenever bottles stick?
First inspect the neck-guide interface and operating pattern. More air does not establish correct geometry, adjustment or transition behaviour.
Technical reading
The linked manufacturer material provides engineering context. This worksheet is an independently written diagnostic framework; the installed equipment’s approved instructions and the site’s product acceptance determine the actual procedure and limits.
China Beverage Machinery is operated by Allot Tech (Suzhou) Co., Ltd. for machinery sourcing, configuration planning and export project coordination.