Can internal pressure testing machine

1. Performance Description

The MT-YLG-XL-C0-04 is a fully automated pressure inspection system, designed to test up to 1,200 cans per minute. It employs a contact-based online measurement method that provides a direct and highly accurate reflection of internal container pressure. The system delivers stable and reliable sampling data, achieving a level of precision that surpasses comparable domestic and international solutions.

At the heart of the system is the belt squeeze detection technology, refined through more than three years of R&D and testing. During operation, products are conveyed by a flexible belt, while sensors positioned on the belt’s side measure the pressure inside cans or bottles. The captured data is converted into digital signals by the controller and analyzed to evaluate container pressure and overall quality.

2. Applicable Inspection Objects

• Aluminum cans filled with liquid nitrogen

• PE/PP plastic bottles containing gas or steam

• Other gas-containing containers (excluding CO₂)

3. Inspection Capabilities

• Pressure measurement

• Leak detection

• No-lid detection

• Inverted can identification

• Blocked can detection

• Automatic rejection of non-compliant products based on user-defined criteria

4. Performance and Parameters

1. Adaptive synchronization with line speed; system halts automatically when the line stops, preventing product rupture caused by idle operation

2. Testing speed exceeding 1,200 cans/minute

3. Capable of both high- and low-pressure testing

4. Static accuracy: ±0.01 MPa

5. Dynamic accuracy: ±0.02 MPa

6. High-speed impact resistance

7. Intuitive human–machine interface

8. Real-time monitoring and display of rejection data

9. Visual light alarm for abnormal impacts

10. Built-in Chinese language operating menu

11. Proprietary Maotong DSP digital signal processing algorithm

12. 24/7 remote technical support

13. Continuous rejection with automatic shutdown

5. Detection Accuracy

• Range: 0.08 – 0.5 MPa

• Accuracy: better than 0.01 MPa (note: excessive vertical vibration of conveyor chains may affect readings)

• Rejection Rate: ≥99.99%

• False Rejection Rate: ≤0.01%

6. Extrusion Detection Principle

A guide mechanism is installed at the inlet to apply a preliminary squeeze, establishing baseline pressure inside the container. If a leak is present, most of the pressure is released before the final measurement at the outlet. For intact containers, pressure variation remains minimal; for defective ones, the difference is significant. This method ensures reliable identification of leaks and poor sealing performance.

7. Equipment detection principle

When a product is conveyed along the belt, it first passes the positioning sensor. This sensor detects the product’s arrival, logs its identification number, and records the corresponding encoder signal through the control unit. The positioning sensor then triggers the force sensor, which captures the instantaneous pressure exerted by the product against the belt. This pressure data is transmitted via the network to the Maotong signal processing board, where it is analyzed and processed. The results are displayed dynamically on the human–machine interface and simultaneously sent to the control unit. If the analysis determines that the product does not meet the pressure requirements, the control unit issues a rejection command, instructing the rejector to remove the product with the matching identification number.

II. Equipment Installation

1. Equipment Handling, Transportation, and Storage

During transportation, the equipment must be firmly secured and properly packaged to avoid damage. Special care should be taken to ensure that the sensors are not subjected to mechanical pressure or tensile stress. The outer surface of the equipment should be protected with moisture-resistant and impact-absorbing materials to guard against scratches, dents, or water ingress. The machine must be fastened securely to the transport vehicle to prevent movement or vibration-related damage.

When unloading, use appropriate lifting equipment and confirm that the machine is safely positioned on the handling equipment to avoid slipping.

For use and storage, the environment must meet the following requirements:

• Relative humidity: 10% – 80%

• Ambient temperature: 0°C – 50°C

2. Installation Specifications

2.1. The equipment should be installed on a level surface, ensuring that the clamping conveyor belt is precisely aligned and parallel with the product’s bottom conveyor belt.

2.2. Before switching on the power, carefully inspect all cables to confirm they are securely connected, and verify that the rack control box is properly grounded.

2.3. Power Supply: Single-phase AC 220V, 50Hz, with a total power consumption of 250W.

2.4. Compressed Air: Pressure range 4–8 bar; air quality must comply with relevant industry standards.

2.5. For best testing accuracy, products should be inspected only after cooling. The machine should be positioned on a straight conveyor section of 1.5–2 meters in length.

3. Equipment Structure and Dimensions

3.1. Overall Size: 600 mm × 1000 mm × 1700 mm
3.2. Frame Material: 304 stainless steel, integrated with conveyor design
3.3. Net Weight: Approx. 100 kg

III. Safety Guidelines for Operation

To ensure safe use, please observe the following precautions:

3.1. Only trained personnel are permitted to operate the equipment.
3.2. Maintenance must be performed exclusively by qualified technicians.
3.3. Confirm that all safety labels and protective devices are correctly installed before operation.
3.4. Do not operate the machine with the cover open. The cover may only be removed after shutting off both power and compressed air.
3.5. Keep hands clear of the reject cylinder connecting rod during machine operation.
3.6. Avoid blocking or touching the photoelectric switch during operation, as this may cause false triggering and lead to potential injury.
3.7. Do not unplug or disconnect electrical connections while the system is powered on, as this may damage sensitive components.
3.8. During maintenance, clearly label the equipment with a warning tag to prevent accidental operation.
3.9. Before connecting external devices, ensure that both the equipment and the external device are powered off. Restore power only after all connections are securely made.
3.10. Since internal electronic components are static-sensitive, both the frame and control cabinet must be properly grounded.

IV. Commercial Terms

1. Delivery: To the buyer’s production facility.

2. Warranty: 12 months from the date of acceptance, not exceeding 14 months from shipment.

3. Post-Warranty Service: For two years beyond the warranty, only engineer travel and spare parts costs will be charged.

4. Preventive Maintenance: Two on-site inspections per year (two days each); the purchaser covers only spare parts. Inspection requests must be submitted at least two weeks in advance by fax.

5. Software: Free long-term software upgrades will be provided, with no hardware modifications required.

6. Service Response: Upon receiving a written request, the supplier will dispatch service personnel to the buyer’s production site in mainland China within 72 hours.