Bag product leakage detection machine

I. Product Introduction

1. Performance Description

The MT-DZ-XL-S2-01 is a fully automated functional testing system, capable of handling up to 300 packs per minute. It employs a contact-based online detection method, providing direct and precise measurement of internal pressure characteristics within containers. The sampling results are stable, reliable, and demonstrate a higher level of accuracy compared to similar equipment available domestically and internationally.

The system’s core technology is its belt-squeeze detection mechanism, developed and refined through more than ten years of research and practical application. During operation, a flexible belt applies controlled pressure to the product as it moves along the conveyor. A side-mounted sensor then detects the internal response. This signal is converted into digital form by the controller and processed to evaluate the product’s internal pressure and sealing integrity.

2. Applicable Inspection Objects

• Cartons or pouches containing liquid nitrogen

• Plastic packaging bags filled with gas or steam

• Liquid aluminum foil stand-up pouches

3. Inspection Functions

• Detection of leaks caused by faulty seals

• Identification of insufficient pressure or excessive bulging in bags

4. Performance and Key Parameters

1. Automatically synchronizes with production line speed; stops when the line halts to prevent bursting or clogging.

2. Inspection throughput of over 300 bags per minute.

3. Supports testing of both high-pressure and low-pressure products.

4. Pressure detection accuracy up to ±0.02 MPa.

5. High-speed response and reliable performance.

6. Simple and efficient human-machine interface (HMI).

7. Real-time dynamic display of multiple rejection data sets.

8. Visual alarm for abnormal impact conditions.

9. Full Chinese-language operation menu.

10. Proprietary Maotong DSP digital signal processing technology.

11. 24/7 remote technical support.

12. Automatic continuous rejection and shutdown protection.

5. Schematic diagram of equipment extrusion

We incorporate a front-end guiding mechanism that pre-compresses the product to establish a stable internal pressure. If the product has a leak, the system releases the pressure as much as possible, and the residual pressure is measured at the tail end. For intact products, the pressure variation remains minimal, whereas for defective ones, the deviation is significant. This method enables highly reliable detection of leaks and poor sealing performance.

6. Detection Principle

As each product enters the belt, it is first identified by a positioning sensor, which records both the product ID and the corresponding encoder signal via the control unit. The sensor then activates the force sensor, which measures the instantaneous pressure exerted by the product against the belt. The collected data is transmitted over the network to the Maotong signal processing board, where it is analyzed and processed. The results are displayed dynamically on the HMI (human–machine interface) and simultaneously sent to the control unit. If a product fails the pressure standard, the control unit issues a rejection command, and the rejector removes the specific item using its identification number.

II. Equipment Installation

1. Loading, Unloading, and Storage

During transport, the equipment must be firmly secured and properly packaged, with special care taken to prevent pressure or tension on the sensors. The exterior should be wrapped with moisture-proof and shock-resistant materials to avoid scratches, dents, or humidity damage. The device must be fastened securely to the transport vehicle to avoid movement. When unloading, use specialized lifting tools and ensure the machine is firmly fixed to prevent slipping. For usage and storage, the environment should maintain relative humidity between 10%–80% and temperature between 0°C–50°C.

2. Installation Requirements

2.1 Install the equipment horizontally, ensuring the clamping conveyor belt is aligned parallel with the product’s lower conveyor belt.
2.2 Before powering on, carefully check all cables for looseness and confirm that the control box grounding wire is properly connected.
2.3 Connect power supply: Single-phase AC 220V, 50Hz, total power 250W.
2.4 Connect compressed air correctly: pressure range 4–8 bar, quality must comply with industry standards.
2.5 For optimal results, perform testing after the product has cooled, and install the equipment along a straight conveyor section of 1.5–2m in length.

3. Structure and Appearance

3.1 Dimensions: As illustrated above
3.2 Frame: Made of 304 stainless steel, integrated with a conveyor system
3.3 Weight: Approx. 100 kg

III. Safety Precautions

Before operating the equipment, please review and follow the safety guidelines below:

3.1 Only personnel with general training may operate the machine.
3.2 Only personnel with professional training may conduct maintenance.
3.3 Ensure all safety devices and warnings are properly in place before operation.
3.4 Do not operate with the cover open; only open the cover after switching off both power and air supply.
3.5 Keep hands away from the reject cylinder connecting rod while the machine is running.
3.6 Do not block or touch the photoelectric switch during operation, as this may trigger mis-rejection and cause injury.
3.7 Avoid disconnecting electrical connections while the power is on to prevent damage to components.
3.8 During servicing, always tag equipment with warning labels to avoid accidents.
3.9 Before connecting external devices, ensure both systems are powered off; reconnect power only after completing installation.
3.10 As electronic components are sensitive to static electricity, ensure the machine frame and control cabinet are properly grounded.