I. Product Overview

1. Performance Description

The MT-DZ-XL-S2-01 is a fully automated functional testing system capable of inspecting up to 300 packages per minute. Using a contact-based, online detection approach, it directly measures the internal pressure of containers, providing accurate, reliable sampling data. Compared to similar domestic and international equipment, it offers superior precision.

This system utilizes belt-squeeze detection technology, refined through more than ten years of research and industrial application. As products travel along the conveyor, a flexible belt uniformly applies pressure. A side-mounted sensor captures the container’s pressure response, which is converted to digital data by the controller. The system then analyzes this information to assess internal pressure stability and seal integrity.

2. Applicable Products

Cartons or pouches containing liquid nitrogen

Plastic bags filled with gas or steam

Liquid aluminum foil stand-up pouches

3. Inspection Capabilities

Detects leaks caused by defective seals

Identifies abnormal bag pressure, including both underpressure and overexpansion

4. Key Features and Technical Specifications

Automatic synchronization with production lines; the system halts if the line stops, preventing bursting or jamming.

Testing speed: over 300 packages per minute

Suitable for high- and low-pressure products

Pressure measurement accuracy: ±0.02 MPa

Reliable high-speed inspection

Intuitive human-machine interface (HMI) for easy operation

Real-time display of rejection records

Visual alarm system for impact detection

Full Chinese-language interface

Proprietary Maotong DSP-based digital signal processing technology

24/7 remote technical support

Continuous automatic rejection and safety shutdown

5. Front-End Guide Mechanism

A guiding system pre-compresses products to stabilize internal pressure before testing. For leaky items, the system releases excess pressure and measures the remaining pressure at the exit. Well-sealed products show minimal pressure variation, whereas defective items deviate significantly from the normal pressure profile. This method reliably identifies leaks and seal integrity issues.

6. Detection Principle

Each product is first detected by a positioning sensor on the conveyor, recording its ID and encoder signal in the control unit. The sensor triggers the force sensor, which measures instantaneous pressure against the belt. Data is sent to the Maotong signal processing board for analysis, displayed on the HMI for real-time monitoring, and relayed to the control unit. When a defective product is detected, the system instructs the reject mechanism to remove the corresponding item based on its recorded ID.

II. Equipment Installation

1. Transportation, Handling, and Storage

During transport, the equipment must be securely fastened and protected. Avoid external pressure on sensors, and wrap the machine in moisture-proof, impact-resistant materials to prevent damage. Secure it to the transport vehicle to prevent movement or vibration.

Storage and operating conditions:

Relative humidity: 10–80%

Temperature: 10–50°C

2. Installation Requirements

1.Ensure the machine is positioned horizontally and that the clamping conveyor is parallel to the product conveyor.

2.Verify all cable connections and confirm the rack control box is grounded before powering on.

3.Power requirements: Single-phase AC 220V, 50Hz, total 250W

4.Air supply: 4–8 bar, meeting standard quality requirements

5.For optimal accuracy, test products after cooling. Install the system on a straight 1.5–2 meter section of conveyor.

3. Structure and Specifications

Overall dimensions: see reference diagram

Frame: 304 stainless steel, integrated with conveyor system

Weight: approximately 100 kg

III. Safety Guidelines

Before operating the machine, follow these precautions:

1.Only trained personnel should operate the equipment.

2.Maintenance should be performed by qualified staff.

3.Confirm all protective covers and warning labels are in place.

4.Do not operate with the cover open; disconnect power and air supply first.

5.Keep hands away from the reject cylinder’s connecting rod while in operation.

6.Avoid blocking or touching the photoelectric trigger switch to prevent false rejections or injury.

7.Never disconnect electrical connections while powered on to prevent damage.

8.Display visible warning tags during maintenance to avoid accidents.

9.Ensure both the machine and connected devices are powered off before connecting or disconnecting; restore power only after secure connections.

10.As electronics are sensitive to static, ensure proper grounding of the frame and control cabinet.