In modern industrial production, hermeticity and airtightness testing is essential to ensure product quality. Whether it is automotive parts, medical devices, home appliances, or packaging containers, leak testing is required to ensure that there is no leakage, no air permeability, and no liquid leakage. The traditional leakage testing method relies on manual testing or inefficient semi-automatic equipment, which is not only inefficient and has a high misdetection rate, but is also difficult to meet the needs of batch production. The emergence of automatic leak detection machine has completely changed this situation. The equipment can quickly and accurately detect the airtightness or liquidtightness of the product to ensure product qualification rate and sealing performance, widely used in automotive, electronics, medical, packaging and aerospace and other fields.

　　I. The working principle and structure of automatic leakage testing machine

　　1. The automatic leak testing machine mainly adopts the principles of differential pressure detection, flow detection or vacuum detection, etc. By applying pressure or vacuum in the testing chamber, it detects whether there is leakage of the tested workpiece. Its core detection methods include:

　　Differential pressure method of leakage detection: the product to be tested is put into the sealed cavity, and constant air pressure is applied to the cavity. By detecting the pressure difference between inside and outside the chamber and the product, we can determine whether there is any leakage.

　　Vacuum method of leakage detection: The test chamber is vacuumed and the air pressure inside the chamber is monitored for changes. If the air pressure rises, it means that there is external air infiltration, that is, there is a leak.

　　Helium Leak Detection: Fill the product with helium and determine the leakage by mass spectrometer to detect the helium concentration.

　　Water bath leakage detection method: Place the product in water, apply pressure to the interior and observe whether there are air bubbles overflowing.

　　2. Automatic leak detection machine usually consists of the following parts:

　　Feeding system: including conveyor belt, manipulator or automatic feeding device, transferring the products to be tested to the testing station.

　　Sealing and Leak Detection System: The testing chamber seals the products to be tested by air cylinder or vacuum pump. High-precision sensors or flow meters are used to detect the airtightness or liquidtightness.

　　Inspection and Rejection System: The inspection results are fed back through PLC and sensors, and the non-conforming products are automatically rejected.

　　Control and display system: equipped with PLC control and touch screen operation, real-time display of leakage data and storage of inspection records.

　　Discharging system: qualified products are automatically discharged and rejected.

　　Second, the technical characteristics of automatic leakage testing machine

　　1. High-precision detection, improve quality control: adopting differential pressure method or vacuum method to detect leakage, the detection accuracy can reach ± 0.1 Pa. It can accurately detect tiny leakage (10^6mbar-L/s) to ensure the sealing of the products. Avoid manual testing errors and ensure the consistency of batch testing.

　　2. Automation and efficient detection: the equipment supports automatic loading, detection and rejection, realizing unattended detection. The inspection speed of single machine can reach 530 pieces/minute, which greatly improves the inspection efficiency. The inspection process is fully automated, fast and stable.

　　3. Multi-functional detection, adapt to a variety of products: support for airtight and liquid tightness detection, can detect a variety of materials and specifications of products. Can quickly switch the detection parameters to adapt to different product requirements. Applicable to plastic parts, metal parts, rubber parts and other materials leak detection.

　　4. Data recording and tracing function: equipped with data storage and recording system, can save the test results and parameters. The test data can be exported for quality traceability and analysis. Support docking with MES, ERP and other production management systems to achieve production traceability.

　　Advantages of automatic leakage testing machine

　　1. Improvement of detection efficiency and accuracy: automatic leakage testing machine can continuously detect and reject nonconforming products to improve detection efficiency. High precision, able to detect trace gas or liquid leakage, to ensure product sealing performance. Realize 100% full inspection, to ensure that the factory product qualification rate.

　　2. Reduce labor costs and misdiagnosis rate: automatic detection instead of manual leakage detection, reduce labor costs. Avoid manual misjudgment, improve the consistency and reliability of detection. Stable operation for a long time, effectively reducing manual intervention.

　　3. High stability and reliability: adopting high precision sensor and PLC control, stable detection accuracy. Stable operation of equipment, suitable for batch and continuous production. Real-time monitoring of detection data to ensure the accuracy of detection.

　　4. Strong flexibility, wide range of application: can detect a variety of specifications and materials of products, adaptability. According to different product requirements to adjust the detection parameters and mode. Support non-standard customization, suitable for special specifications or high-precision detection requirements.

　　As an indispensable quality testing equipment in modern industrial production, automatic leak detector is widely used in automotive, electronics, medical and packaging industries. It can accurately detect product sealing, improve production efficiency and product qualification rate, and effectively protect product quality. In the era of intelligent manufacturing, automatic leak detection machine will continue to help industrial production to automation, high efficiency and intelligent development.