Bag product leakage inspection machine

I. Product Introduction

1. Performance Overview

The MT-DZ-XL-S2-01 is a fully automated functional testing system designed for high-speed production lines, with a maximum inspection capacity of 300 packs per minute. It employs a contact-based online testing method that accurately measures and reflects the internal pressure characteristics of product containers, ensuring stable and reliable sampling results. Compared with similar domestic and international equipment, it delivers superior testing precision.

At the heart of the system is Maotong’s belt-squeeze detection technology, refined through more than ten years of development and practical application. As products are conveyed, a flexible belt mechanism applies controlled pressure, while a side-mounted sensor detects the pressure response inside the package. The controller converts these readings into digital signals, which are processed to evaluate internal pressure consistency and sealing quality.

2. Applicable Products

• Cartons or pouches filled with liquid nitrogen

• Plastic packaging bags containing gas or vapor

• Liquid aluminum foil stand-up pouches

3. Inspection Capabilities

• Detection of leakage caused by defective seals

• Identification of low internal pressure or excessive bulging in bags

4. Key Features & Parameters

1. Automatic tracking of production line speed; halts when the line stops to prevent bursting or jamming

2. Inspection capacity of >300 bags per minute

3. Compatible with both high- and low-pressure product testing

4. Pressure detection accuracy of ±0.02 MPa

5. High-speed inspection performance

6. Intuitive human-machine interface (HMI)

7. Real-time dynamic display of multiple rejection datasets

8. Visual alarm indicator for abnormal impacts

9. Fully localized operation with a Chinese-language menu

10. Proprietary Maotong DSP-based digital signal processing algorithm

11. 24/7 remote technical support

12. Automatic continuous rejection shutdown function

6. Schematic diagram of equipment extrusion

We incorporate a front-end guiding mechanism that pre-compresses each product to establish a stable internal pressure before testing. In the event of a leak, the system allows the pressure to be released as much as possible, and the residual pressure is measured at the tail end. For properly sealed products, the pressure variation is minimal, while for defective ones, the pressure deviates significantly from the standard. This approach ensures reliable detection of leaks and poor sealing performance.

7. Equipment Detection Principle

As products move along the conveyor, they pass through a positioning sensor, which registers their arrival and records both the product ID and the current encoder signal via the control unit. The positioning sensor then activates a force sensor to capture the instantaneous pressure exerted by the product on the belt. This pressure data is transmitted to the Maotong signal processing board through the network. The board analyzes the data and relays the processed results simultaneously to the human-machine interface (HMI) for dynamic visualization and to the control unit. If a rejection signal is generated, the control unit instructs the rejector to remove the specific product whose ID matches the failed pressure criteria.

II. Equipment Installation

1. Loading, Unloading, and Storage

During transport, the equipment must be securely fastened and packaged. Extra care should be taken to ensure that the sensor is not subjected to external pressure or tension. The equipment exterior must be wrapped with moisture-proof and shock-resistant materials to prevent scratches, dents, and water damage. The machine should be firmly fixed to the transport vehicle to avoid shifting or impact during movement.
When unloading, use proper lifting and handling equipment, ensuring the machine is stably mounted to avoid slipping.
For storage and use, the environmental conditions must be maintained: relative humidity between 10% and 80%, and ambient temperature between 0°C and 50°C.

2. Installation Guidelines

2.1 Install the equipment on a level surface, ensuring the clamping conveyor belt remains parallel to the product’s bottom conveyor.
2.2 Before powering on, check all wiring connections and confirm that the rack control box is properly grounded.
2.3 Power supply requirements: single-phase AC 220V, 50Hz, total power 250W.
2.4 Compressed air requirements: 4–8 bar, meeting industry quality standards.
2.5 For the most accurate testing, products should be inspected after cooling. The equipment should be positioned on a straight conveyor section of 1.5–2 meters.

3. Equipment Structure and Specifications

3.1 Overall Dimensions: As shown above
3.2 Frame Construction: 304 stainless steel, integrated with conveyor system
3.3 Approximate Weight: 100 kg

III. Safe Operation Guidelines

Before operating this equipment, the following safety precautions must be observed:

3.1 Only trained operators may use the machine.
3.2 Maintenance must be performed exclusively by qualified technical personnel.
3.3 Verify that all safety warnings and protective devices are in place before starting operation.
3.4 Never operate the machine with its cover open. Open the cover only after disconnecting both power and compressed air.
3.5 Keep hands away from the reject cylinder’s connecting rod assembly during operation.
3.6 Do not obstruct or accidentally touch the photoelectric sensor during operation, as this may cause false rejection signals and potential injury.
3.7 Do not disconnect electrical connections while the machine is powered on to avoid damage to components.
3.8 Attach proper warning labels when servicing the equipment to prevent accidents.
3.9 Before connecting external devices, ensure both the equipment and external units are powered off. Reconnect power only after connections are secured.
3.10 Since the electronic components are sensitive to static electricity, always ensure proper grounding of both the machine frame and the control cabinet.