What is the Maotong PET Bottle Cap, Liquid Level & Coding Inspection System?
The Maotong PET Bottle Cap, Liquid Level & Coding Inspection System (commonly referred to as a 3-in-1 Vision Inspector) is an automated machine vision solution deployed on filling production lines for industries such as food & beverage and pharmaceuticals. It is designed to automatically verify the integrity of bottle caps, accuracy of fill levels, and quality of printed codes on PET bottles post-filling, capping, and coding, and to automatically reject non-conforming products.
Detailed Inspection Items
Inspection Item | Detection Content |
|---|---|
Cap Inspection | Missing cap, high cap, crooked/skewed cap, broken tamper-evident band. |
Liquid Level Inspection | Under-fill (Low level) / Over-fill (High level). Analyzes the meniscus or liquid line via imaging. |
Coding Inspection | Missing code, incomplete/broken characters, blurred print, incorrect position. |
2. Working Principle
Trigger & Capture: A photoelectric sensor detects the bottle, triggering industrial cameras to capture images of the cap, liquid level zone, and coding area from multiple angles.
Image Processing: Built-in vision algorithms compare captured images against standard templates to determine cap alignment, fill height, and code presence/quality.
Decision & Rejection: The PLC receives the results; defective products (NG) are diverted by pneumatic pushers or diverters, while conforming products (OK) proceed downstream.
Data Management: The HMI displays real-time yield rates and alarm logs, supporting production data traceability.
![Maotong PET Bottle Cap, Liquid Level & Coding Inspection.png]( "Maotong PET Bottle Cap, Liquid Level & Coding Inspection.png")
3. Key Features
Non-contact & Non-destructive: Ensures product integrity at high speeds.
High-Speed Compatibility: Typical models support 24,000 – 72,000 bottles/hour (depending on bottle geometry).
High Rejection Accuracy: Defect rejection rate ≥ 99.9%.
Robust Construction: Stainless steel, waterproof housing (typically IP65 rated) suitable for wet environments in filling areas.
Flexible Changeover: Supports rapid switching between multiple PET bottle formats with storable recipes.
4. Typical Applications
Beverage Industry: Mineral water, carbonated drinks, tea drinks.
Alcohol & Daily Chemicals: Small-volume PET bottles requiring code verification.
Pharmaceuticals & Nutraceuticals: Quality control for PET bottles of oral liquids and health supplements.
