PET Bottle Mouth Inspection Machine Raises Finish Control
In PET and PE packaging lines, the bottle mouth is one of the most important areas for sealing performance. A damaged finish, chipped edge, penetration defect, or oval neck can affect the way the cap fits after filling. Our PET Bottle Mouth Inspection Machine is designed for fully automated, non-contact online inspection of bottle mouth deformation and damage, with a rated capacity of 48,000 bottles per hour.
Why Bottle Finish Inspection Matters Before Filling
For high-speed production, visual inspection cannot depend only on manual checks. The PET Bottle Mouth Inspection Machine uses machine vision technology to inspect PET and PE bottle mouths online, helping identify bottles with deformation or damage before they continue downstream.
Its inspection target is clear: the sealing surface of the bottle finish. This makes the system suitable for production environments where bottle mouth quality must remain consistent as line speed increases. The PET Bottle Mouth Inspection Machine is positioned inside the blow molding machine, at the bottle discharge section, or along the conveyor chain, depending on line layout.
How the PET Bottle Mouth Inspection Machine Works
The inspection process follows a synchronized workflow built around sensor detection, image capture, image processing, and rejection control. As each bottle passes the positioning sensor, the control unit records the bottle ID and the current encoder value. The sensor then triggers the camera to capture the bottle mouth image.
After image acquisition, the image processor analyzes the finish and sends the results to the HMI for real-time display. At the same time, the control unit prepares the rejection action. If the bottle is judged defective, the rejector removes the specific bottle corresponding to the stored ID. This tracking process is central to stable operation at 48,000 bottles per hour.
Camera Lighting and Control Components
The PET Bottle Mouth Inspection Machine combines an area-array CCD analog camera, LED area lighting, fixed-focus optics, image processing, and HMI operation. The camera resolution is 640 × 480 pixels, with an acquisition rate of up to 60 frames per second.
The lighting system uses an LED area light source with a service life of up to 30,000 hours. With front illumination, the bottle mouth appears as a continuous bright ring in the captured image. This bright-ring effect helps make the finish features visible for processing. A fixed-focus lens with manual aperture adjustment supports image clarity and brightness tuning.
A 15-inch touchscreen HMI provides intuitive display and operation. For plants evaluating a Bottle Mouth Inspection Machine, this combination of optical design and control coordination is an important part of day-to-day usability and operator training.
Inspection Scope and Detection Accuracy
The PET Bottle Mouth Inspection Machine focuses on the defects that directly relate to bottle finish condition. Its inspection scope includes through-holes, internal chipping, external chipping, spot chipping, and deformed or oval-shaped bottle necks.
| Inspection item | Defect dimension | Detection accuracy | False rejection rate |
|---|---|---|---|
| Penetration | Vertical section width 0.8 mm, depth 0.25 mm | ≥99.99% | ≤0.03% |
| Internal defects | Vertical section width 0.8 mm, depth 0.25 mm | ≥99.95% | |
| External defects | Vertical section width 0.8 mm, depth 0.25 mm | ≥99.95% | |
| Point defects | Diameter 0.8 mm, depth 0.25 mm | ≥99.99% | |
| Neck deformation | Diameter difference 2 mm | ≥99.95% |
These figures make the PET Bottle Mouth Inspection Machine suitable for lines that require high-speed Preform Mouth Defect Detection Machine capability and consistent bottle finish screening.
Installation and Operating Requirements
The system is designed for standard industrial conditions. Recommended operating altitude is 5–3000 meters, ambient temperature is 5°C–40°C, and relative humidity is 50%–65% RH. Factory floor flatness, load-bearing strength, and related site conditions should meet applicable national standards.
Power and utility requirements include 3 × 380V AC ±10%, 50 Hz, 3PH + N + PE for the main power supply, 220V AC, 50 Hz single-phase for lighting, 24 VDC control voltage, approximately 1.0 kW total power consumption, and 4–6 bar compressed air. Noise level is specified as ≤85 dB, with actual values depending on container type, equipment power, and site acoustics.
FAQs
What bottles can the PET Bottle Mouth Inspection Machine inspect?
The system is suitable for PET and PE bottles on compatible high-speed production lines.
Is the inspection contact-based?
No. The PET Bottle Mouth Inspection Machine performs fully automated, non-contact online inspection using machine vision technology.
Where is the system normally installed?
It can be installed inside the blow molding machine, at the bottle discharge section, or on the conveyor chain.
What defects are included in the inspection scope?
The system detects through-holes, internal chipping, external chipping, spot chipping, and oval-shaped neck deformation.
What is the rated capacity?
The PET Bottle Mouth Inspection Machine is designed for a rated capacity of 48,000 bottles per hour.
