Make PET Bottle Defects Easier To Reject Inline
Inline inspection is a practical safeguard for PET bottling lines where cap placement, fill level, anti-theft ring condition, and inkjet coding must be checked before products move into downstream packaging. A Cap and Liquid Level Inspection Machine is designed for online inspection and automatic rejection of non-conforming PET bottles, helping production teams reduce manual intervention while keeping quality checks consistent at speed.
Equipment Overview
The system is presented as a PET Bottle Cap, Anti-theft Ring, Liquid Level, and Inkjet Printing Inspection System. Its core role is straightforward: inspect PET bottles online, identify defects related to cap condition, anti-theft ring integrity, liquid level, and inkjet printing quality, then remove defective bottles from the production line through an automatic rejection process.
For buyers planning a PET Bottle Inspection System, the key advantage is integration. Instead of separating cap checks, liquid level checks, and code checks into isolated manual steps, the Cap and Liquid Level Inspection Machine brings these critical inspection items into one inline quality-control point. It is suitable for PET bottles with a product volume range from 200 mL to 2 L and supports a maximum throughput of up to 60,000 bottles per hour.
Installation Location Depends On The Line Layout
The installation position should be determined according to the customer’s production line layout. In normal production planning, the inspection system is installed on the conveyor line at a suitable point downstream of the filling machine, where bottles have already passed through filling and capping and are ready for quality confirmation.
A stable conveyor section is important because bottle movement affects image acquisition and rejection timing. The Cap and Liquid Level Inspection Machine should be placed where bottle flow is smooth enough for inspection, and where defective bottles can be rejected without disrupting qualified products.
Filling machine → Conveyor → Inspection system → Rejection unit → Downstream packaging
Inspection Criteria For PET Bottles
The inspection scope is clearly focused on defects that can affect sealing quality, product consistency, and traceability. The machine checks for:
The inspection approach uses multi-angle inspection to reduce blind spots. High-brightness LED lighting with adjustable brightness supports stable imaging, while the graphical man-machine interface makes operation more intuitive for production line staff.
Operating Parameters And Environmental Conditions
The Cap and Liquid Level Inspection Machine is specified for standard industrial operating conditions. Key parameters include:
| Item | Specification |
|---|---|
| Maximum throughput | Up to 60,000 bottles/hour |
| Applicable container | PET bottles |
| Product volume range | 200 mL–2 L |
| Power supply | 220V AC, 50Hz, single-phase |
| Total power consumption | Approx. 2.4 kW |
| Control voltage | 24 VDC |
| Compressed air | 4–12 Pa |
| Operating temperature | 5°C–40°C |
| Relative humidity | 50%–65% RH |
| Installation altitude | 5–3000 m |
Factory conditions such as floor flatness and load-bearing capacity should meet relevant requirements for stable operation. After delivery, equipment and components should be stored properly, with lubrication and maintenance carried out during storage to help prevent surface damage, corrosion, or deformation that may affect installation and commissioning.
How The Inline Process Works
During production, bottles enter the inspection zone by conveyor after filling and capping. LED lighting illuminates the target areas, and the inspection system captures visual information related to the cap, anti-theft ring, liquid level, and inkjet code. The system then compares each bottle against defined inspection criteria. If a bottle is judged non-conforming, the rejection device removes it from the production flow.
This workflow makes the Cap and Liquid Level Inspection Machine especially relevant for beverage bottling quality inspection where speed and consistency are both important. Automated visual inspection helps detect visual defects continuously at high speed instead of relying only on manual checks, which are harder to keep consistent on fast-running lines.
FAQs
What does the Cap and Liquid Level Inspection Machine inspect?
It inspects PET bottle cap defects, anti-theft ring condition, low liquid level, and inkjet printing issues, including missing codes and excessive or abnormal printing.
What bottle sizes are supported?
The system is designed for PET bottles with a product volume range of 200 mL to 2 L.
Where should the machine be installed?
The installation position is determined by the customer’s production line layout. It is generally installed on the conveyor line downstream of the filling machine.
What is the maximum throughput?
The specified maximum throughput is up to 60,000 bottles per hour.
Does the system reject defective bottles automatically?
Yes. The system is designed for online inspection and automatic rejection of non-conforming PET bottles.
