How to identify preform issues when blow-fill-capper detects missing bottles?

Chuxin Mingwei’s fully automatic bottled water filling lines (e.g., models for 5 L, 11.3 L, and 18.9 L PET bottles) do not include integrated blow molding — they are fill-only systems designed to process pre-blown bottles. Therefore, 'missing bottles' detected at the filler or capper stage are never caused by preform feeding or blow-molding faults within our equipment scope.

This is a critical boundary: Chuxin Mingwei supplies bottle washing–filling–capping units (as highlighted in both the Bottled Spring Water Filling Line and Bottled Purified Water Filling Line product specs), not blow-fill-cappers. Missing bottles at the filler inlet point to upstream issues — most commonly inconsistent bottle supply from external blow molders, misaligned bottle transfer conveyors, sensor calibration drift, or mechanical jamming in the bottle unscrambler or starwheel feeders.

To systematically identify root cause: (1) Verify bottle presence upstream — check photoelectric sensors at the bottle infeed station; (2) Inspect bottle orientation and neck integrity — warped or off-center necks disrupt gripper engagement; (3) Review PLC alarm logs for timing mismatches between bottle arrival and filler indexing; (4) Confirm compatibility — our lines support standard 18.9 L, 11.3 L, and 5 L drinking water bottles, but require consistent wall thickness and base geometry per batch.

If your facility uses an integrated blow-fill-capper, that system falls outside Chuxin Mingwei’s engineering scope and service coverage. For accurate diagnosis, we recommend coordinating with your blow molder’s technical team and sharing synchronized video of the missing-bottle event. Our after-sales engineers can assist with interface verification — e.g., signal handover timing, bottle centering tolerance (±0.8 mm), and air-pressure stability at the filler gripper station — provided the issue occurs after bottles enter our washing-filling-capping unit.

Next step: Contact Chuxin Mingwei’s project support team with your line model ID, PLC alarm snapshot, and a short video clip showing the missing-bottle condition. We’ll conduct remote diagnostics and, if needed, dispatch field engineers for on-site interface validation — included under standard commissioning and extended support plans.