Puffed food air leakage detection machine

I. Product Introduction

1. Performance Overview

The MT-DZ-XL-S2-01 is a fully automatic functional inspection system designed for high-speed production lines, capable of testing up to 300 packs per minute. It adopts a contact-based online detection method, enabling direct and precise measurement of pressure characteristics inside product containers. The system provides stable and reliable sampling data, achieving an inspection accuracy that surpasses both domestic and international counterparts.

Its core technology is the belt-squeeze detection method, which has been continuously developed and optimized over more than a decade of research and field application. During operation, a flexible belt clamp gently compresses the product as it is conveyed, while a side-mounted sensor detects the internal pressure response. The controller converts this signal into a digital output, which is further processed to evaluate the container’s internal pressure and product quality.

2. Applicable Inspection Objects

Cartons or bags containing liquid nitrogen

Plastic bags filled with gas or steam

Liquid aluminum foil stand-up pouches

3. Inspection Capabilities

Identification of leakage caused by defective seals

Detection of insufficient pressure or abnormal bulging in packaging

4. Key Features and Technical Parameters

Adaptive synchronization with production line speed; the machine stops automatically during line downtime to prevent bag rupture or jamming

Inspection throughput of >300 packs/minute

Compatible with both high- and low-pressure product inspection

Pressure detection accuracy up to ±0.02 MPa

High resistance to mechanical shock and vibration

User-friendly HMI (Human-Machine Interface) operation

Real-time dynamic monitoring and display of multiple rejection data sets

Visual light alarm for abnormal impacts

Full Chinese-language menu for localized operation

Proprietary Maotong DSP digital signal processing algorithm

24/7 remote technical support capability

Continuous rejection with automatic shutdown protection

6. Schematic diagram of equipment extrusion

Leak Detection Mechanism

At the front end of the system, a guide mechanism is added to pre-compress the product, maintaining a stable internal pressure. If a leak exists, the system releases pressure to the maximum extent, and the tail-end pressure measurement reveals a significant deviation from the expected value. Conversely, products without leakage exhibit only minor pressure changes. This method enables reliable detection of leaks and poor sealing performance.

7. Detection Principle

As the product moves along the conveyor, it is first identified by the positioning sensor, which records its arrival, product identification number, and encoder signal via the control unit. This action triggers the force sensor, which measures the instantaneous pressure exerted by the product against the conveyor belt.

The captured pressure data is transmitted through the network to the Maotong signal processing board, where it undergoes analysis and processing. The results are then sent to both the human–machine interface (HMI) for real-time display and to the control unit. If the system identifies a product that fails to meet pressure requirements, the control unit issues a rejection signal, and the rejector removes the corresponding defective product.

II. Equipment Installation

1. Loading, Unloading, and Storage

During transportation, the equipment must be firmly secured and properly packaged. Special attention should be paid to protecting the sensors from pressure or tension. The exterior must be wrapped with moisture-proof and impact-resistant materials to avoid scratches, dents, or water damage. The equipment must be tightly fixed to the transport vehicle to prevent movement and vibration.

When unloading, use specialized lifting equipment, ensuring the machine is securely mounted to avoid slipping. During storage and operation, environmental conditions should be maintained within:

Relative humidity: 10%–80%

Temperature: 0°C–50°C

2. Installation Requirements

2.1. Place the equipment horizontally, ensuring the clamping conveyor belt is parallel to the bottom conveyor belt.
2.2. Before powering on, carefully inspect all cable connections and confirm the grounding of the rack control box.
2.3. Electrical requirements: Single-phase AC 220V, 50Hz, total power 250W.
2.4. Pneumatic requirements: Compressed air 4–8 bar, meeting industry quality standards.
2.5. For optimal detection accuracy, it is recommended to test products after cooling. The equipment should be installed on a straight conveyor section 1.5–2m in length.

3. Structure and Appearance

3.1. Overall dimensions: As illustrated in the design diagram
3.2. Frame structure: 304 stainless steel, integrated with conveyor system
3.3. Approximate weight: 100 kg

III. Safety Precautions

Before operating this equipment, please follow the safety guidelines below:

3.1. Only personnel with basic equipment training may operate the machine.
3.2. Maintenance and servicing must be carried out by qualified professionals.
3.3. Ensure that all safety warnings and protective devices are in place before operation.
3.4. Do not operate the equipment with the cover open. The cover should only be opened when both power and compressed air are disconnected.
3.5. Keep hands away from the reject cylinder connecting rod during operation.
3.6. Do not block or touch the photoelectric sensor while the system is running, as this may cause false triggering of the rejector and pose a safety hazard.
3.7. Do not disconnect electrical connections while the system is powered on, to prevent damage to electronic components.
3.8. During maintenance, clearly mark the equipment with safety identification tags to avoid accidental startup.
3.9. When connecting external devices, ensure both systems are powered off. Reconnect power only after completing all connections.
3.10. Since electronic components are sensitive to static discharge, the frame and control cabinet must be reliably grounded.