Control PET Bottle Finish Defects Before Filling
Our PET Bottle Mouth Inspection Machine is designed for automated, non-contact online inspection of bottle mouths on high-speed PET/PE bottle packaging lines. In PET and PE bottle production, the bottle finish is one of the most important quality points because it directly affects sealing performance. A small chip, through-hole, deformation, or oval neck can create problems later during filling, capping, storage, or transport.
The PET Bottle Mouth Inspection Machine, focuses on defects related to the top sealing surface of the bottle finish, rather than general appearance inspection across the full container. It helps identify nonconforming containers before they move further downstream.
Why Bottle Finish Inspection Matters
The sealing surface is the contact area between the bottle and closure. If this area is damaged or deformed, the bottle may not seal correctly and can cause leakage, contamination, or shelf-life issues. On a high-speed line, manual checking is hard to keep consistent, especially when the line is designed for continuous operation.
A PET Bottle Mouth Inspection Machine supports early detection and stable quality control by automatically removing bottles with finish damage at the proper point in the process. By inspecting every container online, it reduces the risk of defective bottles reaching filling and capping, where they become much more costly to handle.
PET Bottle Mouth Inspection Machine Equipment Overview
The MT-PK021 is configured as 1 set and is listed as a Bottle Finish Inspection Machine for PET/PE bottles. It is suitable for a 48,000 bottles/hour PET/PE bottle packaging line, with a rated speed of 48,000 bottles/hour. The system is installed inside the blow molding machine, either at the bottle discharge section or on the conveyor chain.
Key equipment information includes:
| Item | Specification |
|---|---|
| Equipment name | Bottle Finish Inspection Machine |
| Model | MT-PK021 |
| Quantity | 1 set |
| Rated speed | 48,000 bottles/hour |
| Applicable containers | PET / PE bottles |
| Compatible line | 48,000 bottles/hour PET/PE bottle packaging line |
| Installation position | Inside the blow molding machine, at the discharge section or on the conveyor chain |
| Function | Inspects and rejects PET/PE bottles with deformation or damage on the sealing surface |
This configuration matches high-speed PET and PE bottle lines that require continuous, reliable bottle finish inspection without slowing production.
How the PET Bottle Mouth Inspection Machine Works
The MT-PK021 follows a coordinated detection and rejection process to keep inspection and bottle tracking synchronized.
First, as each bottle passes the positioning sensor, the sensor detects the bottle and records its ID together with the current encoder value through the control unit. This allows the system to track the bottle position accurately along the conveyor.
Next, the positioning sensor triggers the camera to capture an image of the bottle mouth. The image is processed by the image processor, then sent to the HMI for real-time display and also to the control unit for rejection preparation. When the control unit receives a rejection signal based on the inspection result, it activates the rejector to remove the bottle matching the stored ID.
This workflow makes the PET Bottle Mouth Inspection Machine suitable for online inspection where detection, tracking, display, and rejection all need to stay synchronized at high speed.
Image Acquisition and Defect Visibility
The inspection system uses an LED area light source with a service life of up to 30,000 hours. With front illumination, the inspected bottle mouth appears in the image as a continuous bright ring, which gives clear contrast for defect recognition and simplifies analysis of the bottle finish area.
The camera is an area-array CCD analog camera with a resolution of 640 × 480 pixels and an image acquisition speed of up to 60 frames per second. A fixed-focus lens with manual aperture adjustment is used. The focus ring is adjusted for image clarity on the CCD sensor surface, while the aperture ring is adjusted to optimize brightness for stable detection.
Inspection Scope and Accuracy
The MT-PK021 PET Bottle Mouth Inspection Machine is built to inspect defects that affect the bottle finish and sealing surface. Its test 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 specifications suit manufacturers that need stable bottle finish quality at a rated line speed of 48,000 bottles per hour, with high detection accuracy and controlled false rejection.
Operating Conditions
Stable installation conditions help the PET Bottle Mouth Inspection Machine perform as intended. The listed operating altitude is 5–3000 meters above sea level, with an ambient temperature range of 5°C–40°C and relative humidity of 50%–65% RH. Factory floor flatness, load-bearing capacity, storage conditions, lubrication, and maintenance should comply with national standards.
Electrical and utility requirements include:
Practical Value for PET and PE Bottle Lines
By placing inspection inside the blow molding machine at the bottle discharge section or on the conveyor chain, the MT-PK021 checks the bottle finish close to the forming stage. This installation approach helps remove bottles with sealing surface deformation or damage before they proceed to later production steps such as rinsing, filling, and capping.
For buyers comparing online bottle inspection options, the key points to review are:
The MT-PK021 presents these specifications clearly for PET/PE bottle lines operating at 48,000 bottles per hour, supporting consistent sealing performance and more reliable downstream packaging.
FAQs
What containers can the MT-PK021 inspect?
It is suitable for PET and PE bottles used on compatible PET/PE bottle packaging lines.
Where is the machine installed?
It is installed inside the blow molding machine, either at the bottle discharge section or on the conveyor chain.
What defects can this PET Bottle Mouth Inspection Machine detect?
It detects through-holes, internal chipping, external chipping, spot chipping, and deformed or oval-shaped bottle necks.
What is the rated speed of the MT-PK021?
The rated speed is 48,000 bottles/hour.
What camera does the system use?
It uses an area-array CCD analog camera with 640 × 480 pixel resolution and image acquisition up to 60 frames per second.
