What is the Maotong Bagged Product Leak Detection Equipment?
The Maotong Bagged Product Leak Detection Equipment (commonly known as an Online Squeeze Leak Detector, Checkweigher, or In-line Crush Tester) is an industrial quality control machine manufactured by Jinan Maotong Testing Equipment Co., Ltd. It is specifically designed for the food, pharmaceutical, and daily chemical industries to perform fully automatic online inspection of seal leaks, micro-leaks, and abnormal bag inflation in flexible packaging (including gas-flushed packaging).
🔧 Basic Configuration
Common models include MT-YLDJ-03 and MT-DZ-XL-S1. Installed at the end of a packaging line, it integrates seamlessly with production flow to automatically handle feeding, squeeze detection, and sorting (rejection). The detection speed typically ranges from 110 to 180 bags per minute.
⚙️ Working Principle — Kinetic Squeeze Detection Technology
This is the core feature of the equipment, distinguishing it from traditional "water bath" or "vacuum decay" methods:
Pre-squeezing: Flexible belts or upper/lower pressure plates clamp the moving bags, applying moderate pressure to build up internal air pressure.
Pressure Maintenance & Conveyance: While being clamped, the bags travel along the compression section. If there is a leak, internal gas escapes through the defect, causing a noticeable drop in pressure.
Data Acquisition & Judgment: High-precision pressure sensors embedded in the belts capture real-time pressure feedback. The controller converts this into digital signals for analysis—a properly sealed bag maintains a standard pressure curve, while a leaking bag shows abnormal pressure drops. The system then triggers a rejection mechanism (striking or air-blowing) to remove defective products.
✅ Dry Testing: Requires no water immersion or chemical reagents, complying with food industry hygiene standards.
🎯 Detectable Defects
Micro-leaks / Air leaks caused by poor heat sealing
Pinholes or punctures in the packaging film
Insufficient inflation (low pressure) or abnormal bag swelling
✨ Key Features & Advantages
Feature | Description |
|---|---|
100% Online Inspection | Integrates with high-speed lines for full inspection instead of sampling. |
Non-destructive & Dry | No water contact; qualified products remain intact and marketable. |
Digitalization | Real-time data display, rejection statistics, and data storage for traceability. |
Automation | HMI operation, automatic alarms, and automatic rejection of defective items. |
Wide Compatibility | Suitable for bread, puffed food, seasoning packets, pharmaceutical powder sachets, etc. |
🏭 Typical Applications
Food Industry: Chips/puffed food bags, bread bags, sauce packets, instant soup bags.
Pharma/Chemical: Bagged powders, small sachets for daily chemicals.
